Implications of Millimeter Wave for 5G System Design

Transcription

1 Sildes are Robert W. Heath Jr Implications of Millimeter Wave for 5G System Design Professor Robert W. Heath Jr. Wireless Networking and Communications Group Department of Electrical and Computer Engineering The University of Texas at Austin Also with PHAZR (see for more information) Thanks to the National Science Foundation Grant No. NSF-CCF , NSF-CCF , NSF- CCF , the Intel / Verizon 5G program, the U.S. Department of Transportation through the Data-Supported Transportation Operations and Planning (D-STOP) Tier 1 University Transportation Center, the the Texas Department of Transportation under Project , and gifts from Nokia, MERL, Huawei, and Toyota.

2 Current cellular spectrum in US Total available bandwidth = ~600MHz 700MHz auctioned in $18,957,582, licenses AWS-3 auctioned in $41,329,673, licenses Sildes are Robert W. Heath Jr : CLR : AWS-1 : PCS : AWS-3 : 700 MHz : 800 MHz : Unlicensed : BRS/EBS 300MHz MHz 900MHz 1.7GHz 1.8-2GHz 2.1GHz 2.4GHz GHz 3GHz See e.g. u Spectra below 3 GHz is packed and $$/Hz of bandwidth is huge To get more bandwidth, need to go to higher carrier frequencies 2

3 Sildes are Robert W. Heath Jr The future is in the mmwave bands (30GHz to 300GHz) ~4 GHz LMDS 1.6 GHz 0.85 GHz 1.4 GHz Unlicensed 7 GHz 7 GHz 7 GHz : Proposed by FCC in GHz E-band 27 GHz 37 GHz 40 GHz 57 GHz 64 GHz 71 GHz Auctioned in 2000 Expected to be unlicensed - $410,649,085 / 2,173 licenses u Lots of potential spectrum currently used for backhaul or legacy systems u Different licensing options available for many bands Spectrum for 5G is (almost) ready!!! Even more is available above 90GHz 86 GHz Robert * S. Rangan, W. Heath T.S. Jr. Rappaport, E. Erkip, "Millimeter-Wave Cellular Wireless Networks: Potentials and Challenges,, Proc. IEEE,

4 Implications on 5G systems mmwave spectrum and higher data rates 4

5 Implications of using millimeter wave spectrum Sildes are Robert W. Heath Jr Shared licensed access possible to reduce cost, give carriers access to more spectrum* satellite communications Cognitive radio for shared spectrum with satellite or radar carrier A cellular communications surface movement radar (K, Ka bands) Higher data rates carrier B New applications possible** * A. Gupta, J. Andrews, R.W. Heath Jr., On the Feasibility of Sharing Spectrum Licenses in mmwave Cellular Systems,, arxiv v1, Dec Robert ** Osseiran W. Heath et al.,"scenarios Jr. for 5G mobile and wireless communications: the vision of the METIS project," IEEE Commun. Mag., May

6 X capacity improvement Sildes are Robert W. Heath Jr What are the potential rate gains with mmwave? % 38x * Note the fine print about dense networks, more to come Baseline 2 GHz w/ Upper cmwave 28 GHz: 50 MHz BW 500 MHz (expect 10x) 62x 28 sparse 28 dense 72 sparse 72 dense MmWave gains are more than a spectrum multiplier Average 58x 95x 28 sparse 28 dense 72 sparse 72 dense mmwave 72 GHz: 2 GHz (expect 40x) * T. Bai and R. W. Heath Jr., Coverage and rate analysis for millimeter wave cellular networks, IEEE Trans. Wireless Commun., Feb ** T. Bai, A. Alkhateeb, and R. W. Heath, Jr., ``Coverage and Capacity of Millimeter Wave Cellular Networks," IEEE Communications Magazine, Sept

7 New 5G killer apps enabled by mmwave AUTONOMOUS ROBOTS small size equipment Vehicle driving cloud mmwave base station VIRTUAL REALITY high data rate V2X COMMUNICATIONS low latency AUTOMATED DRIVING high data rates MmWave high data rates are required in different 5G scenarios Robert W. Heath Jr. 7 * Osseiran et al.,"scenarios for 5G mobile and wireless communications: the vision of the METIS project," IEEE Commun. Mag., May 2014

8 Robert W. Heath Jr. Implications on 5G systems mmwave differentiating features 8

9 Sildes are Robert W. Heath Jr ROH_LAYOUT.qxp_Layout 1/30/14 1:20 PM Page 109 Differentiating features of mmwave Transmitter.. Phase shifters. Mixer... RF beamformer Nar ADC ADC Ncr FFT RF chains S/P DAC MIMO channel H Nat... FFT RF beamformer MIMO decoder.. RF chains. P/S IFFT DAC Receiver LNA Baseband combiner Nct P/S Baseband precoder MIMO encoder Blockage IFFT... S/P PA Baseband channel Array ant. Advanced MIMO architectures Figure 2. Block diagram of a hybrid beamforming architecture. presented in [5], where link- and system-level simulation results are provided with various numbers of transmit/receive antennas and RF chains. Using a 500 MHz bandwidth at 28 GHz, [5] presents some notable results for the hybrid beamforming system including an 8 db gain over the conventional spatial multiplexing scheme and 8 Gb/s average sector throughput with 16 antennas with 4 RF chains at the base station and 8 antennas with a single RF chain at the mobile station. RF/antenna upper array blocked with MMWAVE BEAMFORMING fingersin this section, weprototype present a detailed description of the mmwave beamforming prototype developed and tested at the DMC R&D Center, Samsung Electronics, Korea, including system configuration, key parameters, and capabilities. The main purposes of the mmwave prototype are to check the feasibility of mmwave bands for sufficiently large geographical coverage for cellular services and support for mobility even in NLoS environments. As a result, an mmwave adaptive beamforming prototype was developed including RF units, array antennas, baseband modems, and a diagnostic monitor (DM), as shown in Fig. 3. Both transmit and receive array antennas have two channels and each comprises 32 antenna elements arranged in the form of a uniform planar array (UPA) with 8 horizontal and 4 vertical elements, confined within an area of 60 mm 30 mm. This small footprint was made possible by the short wavelength of the carrier frequency at GHz. Two channels at the transmit and receive array antennas are designed to support various multi-antenna schemes such as MIMO and diversity. The array antenna is lower array blocked by person RF Chain Modem Nr Array antenna RF combining Diagnostic monitor Figure 3. Configuration of the mmwave beamforming prototype. 8 antennas into a sub-array, thus requiring only 4 RF units per channel instead of 32. The reduction in the number of RF paths results in a reduction of antenna gain at the desired angle (except antenna boresight), a reduction of beam scanning ranges, and an increase in side lobe levels, but still meets the overall beamforming requirements. The resulting full width at half maximum (FWHM) of the beam at the antenna boresight is approximately 10 horizontally and 20 vertically with an overall beamforming gain of 18 dbi. In addition, a set of beam patterns is predefined to reduce the feedback overhead required for the adaptive beamforming operation between the transmitter and the receiver, where the overlapped beam patterns cover the intended service area with a unique beam identifier (ID) for each beam. These beam IDs are WRF ADC Lr RF Chain ADC Baseband Combining Ns WBB Directional and adaptive antenna arrays Which are the impacts on a 5G system? R. Heath,W. N.Heath González-Prelcic, S. Rangan, W. Roh and A. Sayeed, An Overview of Signal Processing Techniques for Millimeter Wave MIMO Systems, IEEE JSTSP, Robert Jr.

10 Sildes are Robert W. Heath Jr Implications of adaptive arrays Initial access and handoff become more difficult Interference is bursty, less severe, SINR higher stronger interference weaker interference Large arrays at BS and UE Cell boundaries blur New antennas, cables, infrastructure, baseband Robert * A. W. Thornburg, Heath Jr. T. Bai, and R. W. Heath, Jr., "Interference Statistics in a Random mmwave Ad Hoc Network, ICASSP

11 Implications of more advanced MIMO solutions Sildes are Robert W. Heath Jr Hardware power consumption plays a bigger role in PHY design RF Chain 1-bit ADC ADC Process more signals with fewbit ADCs RF combining Baseband Combining N r L r N s RF Chain 1-bit ADC ADC Hybrid architecture at the BS and the UE with many fewer RF chains than antennas Compressive channel estimation, new pilot designs *A. Alkhateeb, J. Mo, N. González Prelcic and R. W. Heath, Jr., ``MIMO Precoding and Combining Solutions for Millimeter Wave Systems,'' IEEE Commun. Mag., ** R. Méndez-Rial, C. Rusu, N. González-Prelcic, A. Alkhateeb and R. Heath Hybrid MIMO Architectures for MmWave Communications: Phase shifters or switches?, Robert IEEE Access W. Heath Jr. 11

12 Robert W. Heath Jr. Implications on 5G systems Blockage 12

13 Sildes are Robert W. Heath Jr Blockage is a major channel impairment line-of-sight non-line-of-sight X blockage due to buildings hand blocking Handset blockage due to people User X BS Blocked by users body self-body blocking Need models for blockage & system analysis including blockage * W. Roh et al. "Millimeter-wave beamforming as an enabling technology for 5G cellular communications: theoretical feasibility and prototype results," in IEEE Commun. Mag., ** M. Akdeniz, Y. Liu, S. Sun, S. Rangan, T. Rappaport, E. Erkip, Millimeter Wave Channel Modeling and Cellular Capacity Evaluation, IEEE JSAC June

14 Sildes are Robert W. Heath Jr Implications of blockage More BS/km 2 and multibase connectivity provide diversity user with no coverage Indoor users not covered by outdoor infrastructure blocked interferer upper array blocked with fingers Multiple arrays on handset lower array blocked by person unblocked interferer used for macro diversity Blockages reduce the impact of interference * T. Bai and R. W. Heath Jr., Coverage and rate analysis for millimeter wave cellular networks, IEEE Trans. Wireless Commun., Feb Robert * *T. W. Bai Heath and R. Jr. W. Heath Jr., Analysis of self-body blocking effects in millimeter wave cellular systems, in Proc. of Asilomar Conf., Nov

15 Sildes are Robert W. Heath Jr Solutions to building blockage Add more infrastructure Fallback to lower frequency and lower rate User go around the building if you want coverage Line-of-sight link Non-line-of-sight link (blocked by building) Add enough antenna gain to work effectively when blocked Need to cover the non-line-of-sight user 15

16 Solution to body and self-body blocking for 5G Network supports fast switching Sildes are Robert W. Heath Jr System detects blockage and reroutes signals Unblocked BS v X Body blocked BS Similar solutions as building blockage, but different timescale Tianyang Bai and R. W. Heath, Jr., ``Analysis of Self-body Blocking Effects in Millimeter Wave Cellular Networks,' Asilomar Conf. Nov. 2-5,

17 Sildes are Robert W. Heath Jr Solution to hand blockage for 5G 16-element array 1 <0.2 mm no handset diversity handset diversity 16-element array 2 u Multiple arrays on handset if space is available (hard with multi-band) u Train users not to block the arrays with their fingers (warning labels or shock) Hand blockages and variable orientation require careful device engineering Device picture from W. Roh et al. "Millimeter-wave beamforming as an enabling technology for 5G cellular communications: theoretical feasibility and prototype results," in Communications Magazine, IEEE, vol.52, no.2, pp , February (b)

18 A vision for 5G mmwave infrastructure New concepts for the infrastructure Robert W. Heath Jr. 18

19 Sensing at the infrastructure BS supporting V2X Radar operating in another band antennas Robert W. Heath Jr. Radar at the infrastructure can help predict blockages Could leverage communication at other bands A vision of future 5G mmwave infrastructure Improves communication link efficiency and reduces overheads * J. Choi, N. González Prelcic, R. Daniels, C. R. Bhat, and R. W. Heath, Jr., `` Millimeter Wave Vehicular Communication to Support Massive Automotive Sensing,'' submitted to IEEE Communications Magazine, February Also available on ArXiv. ** N. Gonzalez-Prelcic, Roi Mendez-Rial, and R. W. Heath Jr., Radar aided beamforming in mmwave V2I communications support antenna diversity," ITA

20 Sildes are Robert W. Heath Jr Backhaul at mmwave Out-of-band wireless backhaul possible in other mmwave spectra mmwave backhaul links Inband wireless backhaul will work due to pointy beams with low overlap macrocell BS Wired backhaul will require very high capacity Tens of Gbps Backhaul is a 5G killer Zhouyue Pi, Junil Choi, and R. W. Heath, Jr., Millimeter-wave Gbps Broadband Evolution towards 5G: Fixed Access and Backhaul, Robert W. Heath Jr. to appear in IEEE Communications Magazine, June Available at ArXiv. 20

21 Many new components of 5G infrastructure Sildes are Robert W. Heath Jr Self-backhauled network mmwave sensing-bs Combination of sensing, learning and communication mmwave relay mmwave backhaul mutiband BS Multiband-connectivity Relays Robert W. Heath Jr. 21

22 Robert W. Heath Jr. Millimeter wave is coming to 5G Check out research videos at goo.gl/yyx250 22

23 References from Heath research group u u Robert W. Heath Jr. MmWave book ª T. Rappapport, R. W. Heath, Jr., R. Daniels, J. N. Murdock, Millimeter Wave Wireless Communications, Pearson Education, Inc Overview papers ª R. W. Heath, Jr., N. Gonzalez Prelcic, S. Rangan, Wonil Roh, and A. Sayeed, An Overview of Signal Processing Techniques for Millimeter Wave MIMO Systems, to appear in IEEE Journal on Sel. Topics in Sig. Proc., special issue on Massive MIMO. Available on ArXiv. ª Zhouyue Pi, Junil Choi, and R. W. Heath, Jr., Millimeter-wave Gbps Broadband Evolution towards 5G: Fixed Access and Backhaul, submitted to the IEEE Communications Magazine, June Available at ArXiv. ª Shu Sun, T. Rappapport, R. W. Heath, Jr., A. Nix, and S. Rangan, MIMO for Mil- limeter Wave Wireless Communications: Beamforming, Spatial Multiplexing, or Both?, IEEE Communications Magazine, vol. 52, no. 12, pp , Dec ª Ahmed Alkhateeb, Jianhua Mo, N. Gonz ález Prelcic and R. W. Heath, Jr., MIMO Pre- coding and Combining Solutions for Millimeter Wave Systems, IEEE Communications Magazine, vol. 52, no. 12, pp , Dec ª Tianyang Bai, Ahmed Alkhateeb, and R. W. Heath, Jr., Coverage and Capacity of Millimeter Wave Cellular Networks, IEEE Communications Magazine, vol. 52, no. 9, pp ,

24 References from Heath research group u Robert W. Heath Jr. 5G cellular performance analysis with millimeter wave ª Abhishek Gupta, J. G. Andrews, and R. W. Heath, Jr., On the Feasibility of Sharing Spectrum Licenses in mmwave Cellular Systems, submitted to IEEE Trans. on Communications, December Available at ArXiv. ª Tianyang Bai and R. W. Heath, Jr., Coverage and Rate Analysis for Millimeter Wave Cellular Networks, IEEE Trans. on Wireless, vol. 14, no. 2, pp , Feb Previous version available at ArXiv. ª Tianyang Baiand R. W. Heath, Jr., Uplink Massive MIMO SIR Analysis: How do Antennas Scale with Users?, to appear in Proc. of the IEEE Global Telecommu n ication s Con f., San Diego, CA, USA Decemb er 6-10, ª Tianyang Bai and R. W. Heath, Jr., Asymptotic SINR for millimeter wave massive MIMO cellular networks, Proc. of IEEE Int. Workshop on Signal Processing Advances in Wireless Communication, Stockholm, Sweden, June 28 - July 1, ª Tianyang Bai and R. W. Heath, Jr., Asymptotic Coverage and Rate in Massive MIMO Networks, Proc. of the IEEE Global Signal and Information Processing Conference, Atlanta, GA, Dec. 3-5, Video of presentation. 24

25 Robert W. Heath Jr. References from Heath research group u Millimeter wave ad hoc networks ª A. Thornburg, Tianyang Bai, and R. W. Heath, Jr., Performance Analysis of mmwave Ad Hoc Networks, submitted to IEEE Trans. on Signal Processing, July Avail- able at ArXiv. ª A. Thornburg and R. W. Heath, Jr. Ergodic Capacity in mmwave Ad Hoc Network with Imperfect Beam Alignment, Proc. of the Military Communications Conference, Tampa, FL, October 26-28, ª A. Thornburg, Tianyang Bai and R. W. Heath, Jr., MmWave Ad Hoc Network Cov- erage and Capacity, Proc. of the IEEE Int. Conf. on Communications, London, UK, June 8-12, Video of presentation. 25

26 Robert W. Heath Jr. References from Heath research group u Millimeter wave wearables ª K. Venugopal, M. Valenti, and R. W. Heath, Jr., Device-to-Device Millimeter Wave Communications: Interference, Coverage, Rate, and Finite Topologies, submitted to IEEE Trans. on Wireless, June Available at ArXiv. ª K. Venugopaland R. W. Heath, Jr., Millimeter Wave Networked Wearables in Dense Indoor Environments, to appear in IEEE Access. ª K. Venugopal, M. Valenti, and R. W. Heath, Jr., Analysis of Millimeter-Wave Net- worked Wearables in Crowded Environment, (invited) to appear in Proc. of the Asilomar Conf. on Signals, Systems, and Computers, November 8-11, ª K. Venugopal, M. Valenti, and R. W. Heath, Jr., Interference in finite-sized highly dense millimeter wave networks, (invited) Proc. of the Information Theory and Applications, San Diego, California, February 1-6,

27 References from Heath research group u Single user narrowband hybrid precoding (part 1/2) ª Duy H. N. Nguyen, Long B. Le, Tho Le-Ngoc, and R. W. Heath, Jr., Hybrid MMSE Precoding and Combining Designs for mmwave Multiuser MIMO Systems, submitted to IEEE Trans. on Wireless, March ª R. Mendez-Rial, C. Rusu, N. Gonzalez Prelcic, and R. W. Heath, Jr., Low Complexity Hybrid Precoding Strategies for Millimeter Wave Communication Systems, submitted to IEEE Trans. on Wireless, February ª Pengfei Xia, R. W. Heath, Jr., N. Gonzalez Prelcic, Jun Wu, Robust Analog Precoding Designs for Millimeter Wave MIMO Transceivers in Frequency Selective Fading Channels, submitted to IEEE Trans. on Communications, December ª R. Mendez-Rial, C. Rusu, N. Gonzalez Prelcic, Ahmed Alkhateeb and R. W. Heath, Jr., Hybrid MIMO Architectures for Millimeter Wave Communications: Phase Shifters or Switches?, to appear in IEEE Access, November Available on ArXiv. ª Ahmed Alkhateeb, Jianhua Mo, N. Gonzalez Prelcic and R. W. Heath, Jr., MIMO Precoding and Combining Solutions for Millimeter Wave Systems, IEEE Communications Magazine, vol. 52, no. 12, pp , Dec

28 References from Heath research group u Single user narrowband hybrid precoding (part 2/2) ª O. El Ayach, S. Abu-Surra, S. Rajagopal, Z. Pi, and R. W. Heath, Jr., Spatially Sparse Precoding in Millimeter Wave MIMO Systems, IEEE Trans. on Wireless, vol. 13, no. 3, pp , March Previous version available at ArXiv. ª Roi Mendez-Rial, Cristian Rusu, N. Gonzalez Prelcic, and R. W. Heath, Jr., Dictionary-free hybrid precoders and combiners for mmwave MIMO systems, Proc. of IEEE Int. Workshop on Signal Processing Advances in Wireless Communication, Stockholm, Sweden, June 28 - July 1,

29 References from Heath research group u Single user frequency selective hybrid precoding ª Ahmed Alkhateeb and R. W. Heath, Jr., Frequency Selective Hybrid Precoding for Limited Feedback Millimeter Wave Systems, to appear in the IEEE Trans. on Communications, October Available at ArXiv. ª Ahmed Alkhateeband R. W. Heath, Jr., Gram Schmidt Based Greedy Hybrid Precod- ing for Frequency Selective Millimeter Wave MIMO Systems, to appear in the Proc. of the IEEE Int. Conf. on Acoustics, Speech, and Signal Proc., Shanghai, China, March, ª Sungwoo Parkand R. W. Heath, Jr., Frequency Selective Hybrid Precoding in Millimeter Wave OFDMA Systems, to appear in Proc. of the IEEE Global Telecommunications Conf., San Diego, CA, USA December 6-10,

30 References from Heath research group u Multiple user hybrid precoding ª Ahmed Alkhateeb, G. Leus and R. W. Heath, Jr., Limited Feedback Hybrid Precoding for Multi-User Millimeter Wave Systems, to appear in IEEE Trans. on Wireless. Available at ArXiv. ª R. Mendez-Rial, N. Gonzalez Prelcic, and R. W. Heath, Jr., Adaptive Hybrid Pre- coding and Combining in MmWave Multiuser MIMO Systems based on Compressed Covariance Estimation, to appear in Proc. of the IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP), Cancun, Mexico, December 13-16,

31 References from Heath research group u Channel estimation for mmwave systems ª Ahmed Alkhateeb, O. El Ayach, G. Leus and R. W. Heath, Jr., Channel Estimation and Hybrid Precoding for Millimeter Wave Cellular Systems, IEEE Journal on Sel. Topics in Sig. Proc., special issue on Massive MIMO Communication, vol. 8, no. 5, pp , October Previous version available at ArXiv. ª Dalin Zhu, J. Choi, and R. W. Heath, Jr., Auxiliary beam pair design in mmwave cellular systems with hybrid precoding and limited feedback, to appear in the Proc. of the IEEE Int. Conf. on Acoustics, Speech, and Signal Proc., Shanghai, China, March, ª Mohammed E. Eltayeb, Ahmed Alkhateeb, R. W. Heath, Jr., and Tareq Y. Al-Naffouri, Opportunistic Beam Training with Hybrid Analog/Digital Codebooks for mmwave Systems, to appear in the Proc. of the IEEE Global Conference on Signal and Information Processing (GlobalSIP), Orlando, FL, December, ª R. Mendez-Rial, N. Gonzalez Prelcic, and R. W. Heath, Jr., Adaptive Hybrid Pre- coding and Combining in MmWave Multiuser MIMO Systems based on Compressed Co- variance Estimation, to appear in Proc. of the IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP), Cancun, Mexico, December 13-16, ª R. Mendez-Rial, C. Rusu, Ahmed Alkhateeb, N. Gonza ĺez Prelcic, and R. W. Heath, Jr., Channel Estimation and Hybrid Combining for mmwave: Phase Shifters or Switches?, (invited) Proc. of the Information Theory and Applications, San Diego, California, February 2-6,

32 References from Heath research group u Low resolution ADCs including one-bit ADCS 1 / 2 ª C. Mollen, J. Choi, Performance of the Wideband Massive Uplink MIMO with One- Bit ADCs, submitted to IEEE Trans. on Wireless, February ª Junil Choi, Jianhua Mo and R. W. Heath, Jr., Near Maximum-Likelihood Detector and Channel Estimator for Uplink Multiuser Massive MIMO Systems with One-Bit ADCs, submitted to IEEE Trans. on Signal Processing, September Available at ArXiv. ª Jianhua Mo and R. W. Heath, Jr., Capacity Analysis of MIMO Systems with One-Bit Quantization, IEEE Trans. on Signal Processing, vol. 63, no. 20, pp , July Previous version available at ArXiv. ª C. Rusu, N. Gonzalez Prelcic, and R. W. Heath, Jr. The use of unit norm tight measurement matrices for one-bit compressed sensing, to appear in the Proc. of the IEEE Int. Conf. on Acoustics, Speech, and Signal Proc., Shanghai, China, March, ª C. Mollen, J. Choi, E. G. Larsson, and R. W. Heath, Jr., One-bit ADCs in Wideband Massive MIMO systems with OFDM transmission, to appear in the Proc. of the IEEE Int. Conf. on Acoustics, Speech, and Signal Proc., Shanghai, China, March,

33 References from Heath research group u Low resolution ADCs including one-bit ADCS 2 / 2 ª C. Mollen, J. Choi, E. G. Larsson, and R. W. Heath, Jr., Performance of Linear Receivers for Wideband Massive MIMO with One-Bit ADCs, to appear in the Proc. of the 20th International ITG Workshop on Smart Antennas (WSA), Munich, Germany, March 9-11, ª Jianhua Mo, Ahmed Alkhateeb, and R. W. Heath, Jr., Achievable Rates of Hybrid Architectures with Few-Bit ADC Receivers, to appear in the Proc. of the 20th International ITG Workshop on Smart Antennas (WSA), Munich, Germany, March 9-11, ª C. Rusu, R. M éndez-rial, N. Gonz ález Prelcic, and R. W. Heath, Jr., Adaptive One- bit Compressive Sensing with Application to Low-Precision Receivers at mmwave, to appear in Proc. of the IEEE Global Telecommunications Conf., San Diego, CA, USA December 6-10, ª Jianhua Mo and R. W. Heath, Jr., Limited Feedback in Multiple-Antenna Systems with One-Bit Quantization, (invited) to appear in Proc. of the Asilomar Conf. on Signals, Systems, and Computers, November 8-11, Video of presentation. ª Jianhua Mo, P. Schniter, N. Gonza ĺez Prelcic and R. W. Heath, Jr., Channel Estimation in Millimeter Wave MIMO Systems with One-Bit Quantization, Proc. of the Asilomar Conf. on Signals, Systems, and Computers, November 2-5,

34 References from Heath research group u Applications in V2X systems ª Vutha Va, J. Choiand R. W. Heath, Jr., The Impact of Beamwidth on Temporal Channel Variation in Vehicular Channels and its Implications, submitted to IEEE Trans. on Veh. Tech., November Available at ArXiv. ª Vutha Va,Takayuki Shimizu, Gaurav Bansal, and R. W. Heath, Jr., Beam Design for Beam Switching Based Millimeter Wave Vehicle-to-Infrastructure Communications, to appear in the Proc. of the IEEE International Conference on Communications, Kuala Lumpur, Malaysia, May 23-27, ª Vutha Vaand R. W. Heath, Jr., Basic Relationship between Channel Coherence Time and Beamwidth in Vehicular Channels, to appear in Proc. of the Vehicular Technology Conference, Boston, USA, September 6-9, Video of presentation. ª Vutha Vaand R. W. Heath, Jr., Beam Switching for Millimeter Wave Communication to Support High Speed Trains, to appear in Proc. of the Vehicular Technology Conference, Boston, USA, September 6-9, Video of presentation. ª P. Kumari, N. Gonza ĺez Prelcic, and R. W. Heath, Jr., Investigating the IEEE ad Standard for Millimeter Wave Automotive Radar, to appear in Proc. of the Vehicular Technology Conference, Boston, USA, September 6-9, Video of presentation. ª N. Gonza ĺez Prelcic, R. M éndez-rial, and R. W. Heath, Jr., Radar Aided Beam Alignment in MmWave V2I Communications Supporting Antenna Diversity, (invited) to appear in Proc. of the Information Theory and Applications, San Diego, California, January 31 - February 5,

35 Other references u W. Roh et al. "Millimeter-wave beamforming as an enabling technology for 5G cellular communications: theoretical feasibility and prototype results," in IEEE Commun. Mag., u M. Akdeniz, Y. Liu, S. Sun, S. Rangan, T. Rappaport, E. Erkip, Millimeter Wave Channel Modeling and Cellular Capacity Evaluation, IEEE JSAC June 2014 u F. Aryanfar et al., * Millimeter-Wave Base Station for Mobile Broadband Communication, IEEE International Microwave Symposium (IMS), u X. Lin and J. G. Andrews, Connectivity of millimeter wave networks with multi-hop relaying, IEEE Wireless Letter 2015 u S. Singh, M. N. Kulkarni, A. Ghosh, and J. G. Andrews, Tractable model for rate in self-backhauled millimeter wave cellular networks, JSAC 2015 u T. Marzetta, Noncooperative cellular wireless with unlimited numbers of base station antennas, IEEE Trans. Wireless Commun., Nov u F Boccardi, RW Heath Jr, A Lozano, TL Marzetta, P Popovski, Five Disruptive Technology Directions for 5G, IEEE Communications Magazine, 2014 u T. Bai, R. Vaze, and R. W Heath, Jr., Analysis of Blockage Effects on Urban Cellular Networks, IEEE Trans. Wireless, u ETSI White paper no. 9, E-Band and V-Band - Survey on status of worldwide regulation, June Robert W. Heath Jr. 35