Massive MIMO prototype and mmw OTA Test challenge

Transcription

1 Massive MIMO prototype and mmw OTA Test challenge Philip Chang Senior Project Manager July, 2017

2 5G Market direction Expected timeline Pre-3GPP specifications Pre-commercial trials Low volume, but influential market Proprietary solutions superseded by 3GPP-standardised equipment Commercial deployment Some operators seeking to commercialise Acceleration V1 (NSA) v2 (SA/NSA) 5G Phase 1 Specification 3GPP Rel-15 New Radio Research 3GPP Infra deployment Initial UE development Proprietary pre-commercial solutions 3GPP-based solutions 5G Network commercialisation Infrastructure trials 5G Phase 2 Specification Carrier test 3GPP Rel-16 KMF

3 Verizon Pre-5G Mobile Test Low Latency Test 3

4 Market Trend: 5G Spectrum Availability mmwave Frequency Opens New Possibilities.and Challenges! 5G mmwave bands ad/ay 24 GHz GHz GHz 52 GHz 57 GHz GHz GHz GHz GHz 88 GHz Open Spectrum 5G will include both mmwave and <6 GHz Broad range of mmwave spectrum identified for 5G 28GHz & 39GHz are targeted for early mmwave 5G Integrated RFIC/Antenna (Massive MIMO) No connectorized access to DUT TX/RX Traditional cabled test methods obsolete Key Driver for mmwave OTA in Test Frequency Europe FCC (2016/6) ITU (2015/10) SI Japan Korea 28GHz (25-27GHz) BW 425MHzx GHz GHz 37GHz BW 400MHzX GHz 39GHz BW 200MHzX GHz UK at least FFS GHz GHz UK at least GHz GHz GHz 57-66GHz GHz (extend 64-71GHz 66-71GHz ISM unlicensed) 66-76GHz 71-76GHz 81-86GHz UK at least KMF

5 Array Antenna Technology LTE MIMO Horizontal antenna array Massive MIMO 2-D antenna array Key technology BF and spatial multiplexing Antenna Technology Capacity Challenge Confidentiality Label 5

6 Demonstration Test System in MWC 2017 Hardware structure ~ 1m Far Field: 2*D 2 /λ ~ 0.32m <MF

7 Demonstration Test System in Taiwan Hardware structure N9040B UXA ~ 60cm Far Field: 2*D 2 /λ ~ 0.32m M8190A Wideband AWG (I/Q Generation) Differential IQ E8267D PSG Verizon 5G, Pre-5G <MF

8 Testing OTA: The Cable is Gone Extending Metrology Over the Air Radiated Antenna TRP, TIS Beam Profiles Side-Lobes Individual Element RF Parametric EVM, ACLR PER, Emissions Functional Performance Modem Test, Full Stack Testing, Data Throughput, Mobility Elements of Beamforming & Beamsteering OTA TODAY mmwave 5G OTA Today: Traditional OTA Cellular & A/D Radiated Antenna Tomorrow: New OTA in mmw 5G RF Parametric Functional Performance KMF

9 Testing OTA: The Cable is Gone Working with a wide range of equipment Radiated Antenna RF Param. Function al Perform. Signaling test OTA Nonsignaling RF test Antenna Test KMF

10 OTA Chamber Types Direct Far Field test system is based on combination of the antenna aperture (D) and the operating frequency/wavelength (λ) to measure a true far field distance defined as FF= 2D 2 /λ. AUT 2D 2 /λ Source Horn What is D? Compact Test Range (CATR) uses reflectors to focus the RF energy into a plane wave within a much shorter distance than would normally be required to achieve radiated far field measurements. AUT Source Horn Near-field test system measures the energy in the radiating nearfield region and converts those measurements by a Fourier transform into the far-field result. AUT Near Field Probing KMF

11 Antenna Measurements Far-Field Range Carried out at a relatively long distance from the Antenna Under Test (AUT), usually the Fraunhofer distance (2D 2 /λ, D = aperture diameter, λ = test wavelength) Advantages Antenna parameters are defined for the far-field so no additional calculations Disadvantages Fraunhofer distance is an approximation Results in 22.5º phase taper over the antenna aperture Require a lot of real estate, weather dependent Application Antenn a size Frequency Far field distance Backhaul 20cm 28GHz 7.5 m CPE 10cm 28GHz 1.9 m Device 2cm 28GHz 0.1 m Source/Receiver AUT Distance > 2D2 λ 22.5 Phase Front D AUT 2017 AD Symposium 11

12 Antenna Measurements Far-Field Distributed Measurement System 2017 AD Symposium 12

13 Antenna Measurements Compact Antenna Test Range (CATR) Achieves a far-field range in a compact distance Advantages No (22.5º) phase taper across the antenna aperture Small amount of real estate, weather independent Disadvantages Expensive Test Antenna Reflector Reflector Test Antenna Source Antenna Source Antenna 2017 AD Symposium 13

14 Antenna Measurements CATR Measurement System 2017 AD Symposium 14

15 Antenna Measurements Near-Field Range Planar Carried out close to the AUT by scanning a small probe antenna Measurements transformed to far-field range Planar For highly directive antennas Cylindrical For antennas with energy in the azimuth plane Spherical - For low gain omnidirectional antennas Cylindrical Advantages No (22.5º) phase taper across the antenna aperture Determines the infinite far-field pattern Small amount of real estate, weather independent Spherical Disadvantages Requires precise positioning of the probe antenna Estimated far-field pattern 2017 AD Symposium 15

16 Antenna Measurements Near-Field Measurement System PNA-X PNA-X 2017 AD Symposium 16

17 N5290A/N5291A mmwave NA systems N5291A 900Hz 120 GHz mmwave Network Analyzer System N5290A 900Hz 110 GHz mmwave Network Analyzer System (no need of export license) New N5292A 2/4 port test set controller PNA: 2-port, 26.5/67 GHz PNA-X: 4-port, 26.5/67 GHz ) Keysight Design and Compact frequency extender module N5293AX03 / N5295AX03 (110GHz/120GHz) 17

18 Testing OTA: The Cable is Gone Working with a wide range of equipment Radiated Antenna RF Param. Function al Perform. Signaling test OTA Nonsignaling RF test Antenna Test KMF

19 Device Non-signaling OTA Measurement Far-Field Distributed Measurement System Far Field: 30cm EIRP: mmw input: -27dBm -12 dbm Air loss: 50dB 15dB gain horn ~4cm effective DUT Antenna Keysight OTA Test Chamber Confidential 7/18/2017

20 Device Non-signaling OTA Measurement CATR Measurement System z 1 DUT y x Range antenna reflector Feed antenna Positioner controller PM/SG PC 3GPP TR Figure : CATR measurement system setup Keysight OTA Test Chamber Confidential 7/18/2017

21 Device Non-signaling OTA Measurement Near-Field Measurement System Device Control mmw Testhead 2017 AD Symposium 21

22 Introducing E7760A and M1650A World s 1 st ad Non Signaling One Box Tester 1 st Y7707A ad Application SW Performs all tests in the ad standard Runs inside the E7760A E7760A Wideband Transceiver 1 VSA, 1 VSG in 2U form factor saves rack space 2 x IFIO ports (SMA): 2 18 GHz 6x RF ports (Type N): 55-68GHz for mmwave Transceivers (M1650A) M16M1650A mmwave Transceiver, 55 68GHz Each M1650A is bidirectional and tunable Includes 2 meter cable to deliver signals near the DUT Single cable from E7760A provides the LO, power, and control signals 22

23 N9041B UXA Lockouts A series of firsts 1 st 3 Hz GHz Continuous sweeps 1 st 5 GHz BW (with external oscilloscope) 1 st Up to 1 GHz internal BW -150 dbm/hz DANL up to 110 GHz 1 st Industry s first integrated 110 GHz signal analyzer 10/4/2016 N9041B introduction 23

24 Testing OTA: The Cable is Gone Working with a wide range of equipment Radiated Antenna RF Param. Function al Perform. Signaling test OTA Nonsignaling RF test Antenna Test KMF

25 Typical SISO OTA system Anechoic chamber Mechanical positioner and/or circular measurement antennas & electronic switching Keysight MXA UE under test Coaxial relays Keysight UXM Communication uplink Communication downlink In very large chambers ~30dB of fixed gain may be necessary Optional power combiner for Carrier Aggregation Keysight MBO

26 Typical multi-probe MIMO OTA system Anechoic chamber Keysight FS32 16 or 32 output channel emulator Keysight UXM 16 or 32 DL antennas Communication uplink In very large chambers ~30dB of fixed gain may be necessary Keysight MBO

27 Multi-probe MIMO OTA system Keysight Confidential 27

28 Summary Keysight Solutions Cover the Wide Range of OTA Testing Industry s first 120 GHz mmwave Network Analyzer Industry s first integrated 110 GHz Signal Analyzer Industry s first mmw One Box signaling/non-signaling Tester Keysight provide flexible SW for OTA performance and functional Testing

29 Questions? Keysight Confidential 29