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Cellular phone

-2. 10. noise + interference. Base-station. -3. 10. Direct. Reflections. -4. 10. Execution time (in seconds). User 1. User 2. -5. 10. Single DSP implementation. 2 DSP implementation. Target data rate - 128 Kbps/user. 2 DSPs + 2 FPGAs. -6. 10. 0. 5. 10. 15. 20. 25. 30.

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Cellular phone

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  1. -2 10 noise + interference Base-station -3 10 Direct Reflections -4 10 Execution time (in seconds) User 1 User 2 -5 10 Single DSP implementation 2 DSP implementation Target data rate - 128 Kbps/user 2 DSPs + 2 FPGAs -6 10 0 5 10 15 20 25 30 35 Users Web pages Come from a Cellular phone and - or a - Basestation (Cellular tower) Videophone calls BER vs Path loss in dB and are… Then, take these algorithms (theory)… -148 -140 -130 -120 -110 -102 …to implementation in a prototype basestation (practice) Scheme with RF 1.00e-1 BER Baseband Simulation 1.00e-2 antenna DSP + FPGA Performs channel estimation -148 -140 -130 -120 -110 -102 2.4 GHz ISM hardware DSP + FPGA DSP + FPGA Path loss in dB Performs RF reception Performs detection Performs decoding Next Generation Cellular System Multimedia capabilities Multirate services Guaranteed Quality of service Higher Data Rates: 2 Mbps, 384 Kbps, 128 Kbps. RENE: Wireless Cellular RadioSrikrishna Bhashyam, Sridhar Rajagopal, Kanu Chadha, Dinesh Rajan, Bryan Jones, Yuanbin Guo, Ahmad Khoshnevis, Frank Livingston, Charles Camp, Behnaam Aazhang, Joseph Cavallaro RENE Receiver antenna Channel estimator  Web page Sent via RF (radio waves) over the air RF receiver / demodulator Detector Decoder Videophone call Algorithm Implementation Theory Practice Channel Effects • Multiple Users share spectrum • Multiple Access Interference • Multipath Fading • Additive White Gaussian Noise Multiprocessor Basestation Implementation The Wireless Channel The Sundance board contains 2 DSPs and 2 FPGAs. Multiprocessor Simulations The channel estimator and detector have been implemented on this platform. Measurements show a 2 DSP solution to be faster than a single DSP solution. Projects demonstrate using both DSPs and FPGAs provides even greater performance. Larger values are worse (slower) Modeling of RF in W-CDMA with SystemView Output BW=InFs/N N: 2~64 --wideband 32~65536--narrow Decimation factor >40MSPS Future Work Welkin >40MSPS Complete system evaluation on multiple DSPs and RF hardware Carrier offset and synchronization - multiple users Mobile handset - low power, fixed point DSP implementation Integrating physical layer with higher layers Task partitioning and Parallel architectures for acceleration Welkin • CompleteSystem withDSP+RF • Distortion TrueRF modeling (IP3,P1dB, NF…) • Real worldComponent Specification • Multi-domain Integration ( SystemView + Matlab) • Software Radio design with DDC/DDS

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