tailieunhanh - Báo cáo hóa học: " OFDM versus Single Carrier: A Realistic Multi-Antenna Comparison"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: OFDM versus Single Carrier: A Realistic Multi-Antenna Comparison | EURASIP Journal on Applied Signal Processing 2004 9 1275-1287 2004 Hindawi Publishing Corporation OFDM versus Single Carrier A Realistic Multi-Antenna Comparison Jan Tubbax Interuniversity Micro-Electronics Center IMEC Kapeldreef 75 3001 Leuven Belgium Email Liesbet Van der Perre Interuniversity Micro-Electronics Center IMEC Kapeldreef 75 3001 Leuven Belgium Email Marc Engels Interuniversity Micro-Electronics Center IMEC Kapeldreef 75 3001 Leuven Belgium Email Hugo De Man Interuniversity Micro-Electronics Center IMEC Kapeldreef 75 3001 Leuven Belgium Email Marc Moonen Department of Electrical Engineering Catholic University of Leuven KUL Kasteelpark Arenberg 10 3001 Leuven Belgium Email Received 20 June 2003 Revised 20 November 2003 There is an ongoing discussion in the broadband wireless world about the respective benefits of orthogonal frequency division multiplexing OFDM and single carrier with frequency domain equalization SC-FD . SC-FD allows for more relaxed front-end requirements of which the power amplifier efficiency is very important for battery-driven terminals. OFDM on the other hand can yield improved BER performance at low complexity. Both schemes have extensions to multiple antennas to enhance the spectral efficiency and or the link reliability. Moreover both schemes have nonlinear versions using decision feedback equalization DFE to further improve performance of the linear equalizers. In this paper we compare these high-performance OFDM and SC-FD schemes using multiple antennas and DFE while also accounting for the power amplifier efficiency. To make a realistic comparison we also consider most important digital imperfections such as channel and noise estimation transmit and receive filtering clipping and quantization as well as link layer impact. Our analysis shows that for frequency-selective channels the relative performance .