Diversity codes for MPSK modulation in an AWGN channel

• Main Authors: Ya-Wen Yang, 楊雅雯
• Other Authors: Char-Dir Chung
• Format: Others
• Language: zh-TW
• Published: 2001
• Online Access: http://ndltd.ncl.edu.tw/handle/58093802306100611058

碩士 === 國立中央大學 === 電機工程研究所 === 89 === A simple diversity scheme [2] which operates on an AWGN channel is proposed in this thesis. The transmitter consists of a nonlinear block encoder and MPSK modulator. Bandwidth-preserving, bandwidth-expanding and bandwidth-reducing signaling formats are considered. The performance analysis with maximum-likelihood (ML) coherent receiver is presented to detect the received diversity signal codeword by codeword. According to the union bound as the code merit figure (CMF), useful short diversity codes are searched based on the code search procedure and compared with error control codes. It is concluded that diversity systems using the found short-blocklength codes not only exhibit good performance gain but also little procession delay. The effect of imperfect phase synchronization to the proposed diversity coding systems is also taken into account in this thesis.