An Adaptive Receiver Design for OFDM Systems Using Conjugate Transmission
作者： Chin-Liang Wang , Po-Chung Shen , Ying-Chang Lin , Jia-Hong Huang
DOI: 10.1109/TCOMM.2012.100512.110213
关键词: Bit error rate 、 Communication channel 、 Transmitter 、 Engineering 、 Carrier frequency offset 、 Phase (waves) 、 Orthogonal frequency-division multiplexing 、 Transmission (telecommunications) 、 Frequency offset 、 Control theory
摘要: In this paper, we propose an adaptive receiver for efficient intercarrier interference (ICI) cancellation in orthogonal frequency division multiplexing (OFDM) systems using two-path conjugate transmission. This design is based on the phase rotated (PRCC) concept presented recently, where two individual rotations are employed receive paths, rather than only one rotation adopted transmit paths PRCC scheme. We derive optimal criterion of maximizing carrier-to-interference ratio, and then develop normalized block least mean-squared algorithm to approach solutions. With such receiver, carrier offset (CFO) variations due channel effect mismatch between oscillators at transmitter can effectively be tracked without feeding back CFO estimate as required PRCC. Simulation results demonstrate that proposed has better bit error rate performance conventional CC scheme various time-varying channels, even when CFO/channel estimation considered.
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