Modeling of RF in W-CDMA with SystemView RENE: Wireless Cellular Radio Srikrishna Bhashyam, Sridhar Rajagopal, Kanu Chadha, Dinesh Rajan, Bryan Jones, Yuanbin Guo, Ahmad Khoshnevis, Frank Livingston, Charles Camp, Behnaam Aazhang, Joseph Cavallaro RENE Receiver Next Generation Cellular System Multimedia capabilities Multirate services Guaranteed Quality of service Higher Data Rates: 2 Mbps, 384 Kbps, 128 Kbps. antenna Cellular phone Basestation (Cellular tower) - or a - and are… Come from a Channel estimator Web pages Videophone calls and  Web page Sent via RF (radio waves) over the air RF receiver / demodulator Detector Decoder Videophone call Algorithm Implementation Theory Practice Then, take these algorithms (theory)… …to implementation in a prototype basestation (practice) Channel Effects Multiple Users share spectrum Multiple Access Interference Multipath Fading Additive White Gaussian Noise Multiprocessor Basestation Implementation 2.4 GHz ISM hardware DSP + FPGA Performs channel estimation Performs detection Performs decoding Performs RF reception antenna The Wireless Channel Direct Reflections noise + interference User 1 User 2 Base-station 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) 5 10 15 20 25 30 35 -6 -5 -4 -3 -2 Execution time (in seconds) Users Single DSP implementation 2 DSP implementation Target data rate - 128 Kbps/user 2 DSPs + 2 FPGAs Modeling of RF in W-CDMA with SystemView -148 -140 -130 -120 -110 1.00e-2 1.00e-1 BER Path loss in dB BER vs Path loss in dB Baseband Simulation Scheme with RF -102 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 Complete System with DSP+RF Distortion True RF modeling (IP3,P1dB, NF…) Real world Component Specification Multi-domain Integration ( SystemView + Matlab) Software Radio design with DDC/DDS