Enabling Future Wireless Technology Research through Flexible & Modular Platforms
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1 Enabling Future Wireless Technology Research through Flexible & Modular Platforms Richard Silley Business Development Manager RF & Communications
2 Evolution of Wireless Communications How can we increase throughput? Simple Modulation Schemes Complex Modulation Schemes MIMO 2
3 Global Mobile Data Traffic, by Type 3
4 Cellular Evolution x2 5 MHz Peak Rate Targets (Mbps) 4x4 20 MHz 8x8 5x20 MHz 3G (2005) LTE (2010) LTE Advanced (>2015) 4
5 RF Engineering Experience NI s RF Growing Investment Bangalore, India RF Software (Cellular, Wireless Connectivity, Navigation, etc) Santa Rosa & San Jose, CA RF HW design centers Austin, TX RF HW design, SW driver and utilities Global RF Systems Engineers 5
6 NI s Key Technology Investments Optimizing for multicore and FPGAs High-speed data movement Timing and synchronization NI STCIII, PCIe x4, 800 MB/s sustained data transfer 6
7 PXI: A Solution to Next-Gen RF Instrumentation Industry trends produce Increasing emphasis on measurement speed RF instruments more applications Pushing the limits of RF performance Multi-Core CPU Industry-leading Speed Flexible HW & SW Solve Unique Apps High-Performance RF High Accuracy 7
8 NI Software for Connectivity & Cellular GSM/EDGE + WCDMA & HSPA+ LTE (UE FDD/TDD) WiMAX ZigBee RFID/NFC WLAN a/b/g/n/ac GNSS GPS, GLONASS, GALIELO AM/FM/RDS Bluetooth (2.1+EDR) Early Access CDMA2000 Early Access EV-DO 8
9 RF Power Amplifier Testing Challenge: Changing PA Market dynamics More modes + more bands = more measurements Increasing time-to-market pressure RF instruments test faster & cheaper Solution: Migrate existing test bench to PXI Reduce test time and maintain accuracy With PXI, we were able to reduce the characterization time of new parts from two weeks to about a day Gary Shipley, Senior Engineer 9
10 Solution: PXI-Based Tester Previous Characterization Test Bench PXI-Hybrid Characterization Test Set Original Test Time PXI Test Time Speedup GSM Test 6 sec 1.1 sec 6x EDGE Test 14 sec 1.1 sec 14x WCDMA Test 9 sec 1.1 sec 9x 10
11 NI PXIe-5665: 14 GHz Spectrum Analyser Specifications Freq Range: 20 Hz to 3.6 / 14 GHz Analysis BW: 25/50 MHz with DDC Noise Floor : < -154 dbm/hz (< GHz IP3: > +24 dbm (700 MHz to 3.6 GHz) Phase Noise: -129 dbc/hz (800 MHz at 10 khz offset) Form Factor: PXI Express (x4), 3.6 GHz - 5 slots 14 GHz - 7 slots Features Preselector from 3.6 to 14 GHz RF List Mode Multichannel receiver architecture High-speed data streaming and P2P 11
12 Modular Architecture Pre amp 5605 Low Path <3.6G 3.6G BPF 4.6G 612.5M Cal Tone MHz to MHz 4GHz 800 MHz NI PXIe-5622 Digitizer 2. NI PXIe-5605 Downconverter 3. NI PXIe-5653 Synthesizer RF In 5605 High Path Doubler x2 800 MHz MHz to MHz MHz to MHz 300 khz 1 Preselector Filter Bank DAC DDC/ FFT Cal Tone LPF 5 MHz
13 Phase Coherent Signal Gen./Analysis NI PXI-5611 PLL NI PXI-5611 PLL 90 + NI PXI Traditional Shared 10 MHz Clock National Instruments Shared Local Oscillator 13
14 Channel-to-Channel Phase Accuracy STDEV = 0.37 STDEV =
15 Best in Class Synchronization Example: 6 Channel Phase Coherent Record Setup Shared LO Architecture for phase coherence Less than 0.1 of channel-to-channel jitter 50 MHz BW Each Channel, Total of 1.5 GB/sec Streamed to Disk 15
16 NI PXI Express System Streaming Rates 800 MB/s 700 MB/s 700 MB/s Streaming to/from Controller Memory Can sustain 7 unidirectional streams at 800 MB/s for a total of 5.6GB/s Streaming to/from Disk Can sustain 4 streams at 700 MB/s for 2.8GB/s/direction (5.6GB/s total system) Peer-to-Peer Streaming Can sustain 8 streams at 700 MB/s for 5.6GB/s/direction (11.2GB/s total system)
17 FPGA Processing with NI FlexRIO Xilinx Virtex-5 SXT-series FPGAs Direct access to FPGA GPIO Use with adapter module for I/O Peer-to-peer streaming 800 MB/s across PXI Express backplane 16 simultaneous streams Onboard DRAM 2x 256 MB banks 1.6 GB/s per bank Enhanced Synchronization Share PXI 10 MHz reference clock or DSTAR_A with adapter module
18 Video Transmission Video Reception Video Over LTE-Advanced 8x8 MIMO 2x20 MHz OFDM Tx OFDM Rx MIMO Encoder Carrier 1 OFDM Tx OFDM Tx OFDM Rx OFDM Rx MIMO Decoder Carrier 1 OFDM Tx OFDM Rx OFDM Tx OFDM Rx MIMO Encoder Carrier 2 OFDM Tx OFDM Tx OFDM Rx OFDM Rx MIMO Decoder Carrier 2 OFDM Tx 8x8 MIMO Wireless Channel OFDM Rx 18
19 8x8 MIMO LTE-Advanced Testbed 19
20 8x8 MIMO LTE-Advanced Testbed Demo 20
21 HW Block Diagram 21
22 8x8 MIMO LTE-Advanced Testbed Demo 22
23 Summary NI has a strong and growing investment in RF & Communications Instrumentation (HW & SW) Benefit from PCs, FGPAs, and PXI NI s architecture enables more advanced RF solutions with P2P streaming and LabVIEW FPGA 23
24 Questions? For more information and to arrange a demonstration please contact: Richard Silley Business Developer Manager RF & Comms richard.silley@ni.com
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