More Results on Diversity Codes for Differential Phase Modulation in Correlated Rayleigh Fading Channels

• Main Authors: Dhih-Chang Chen, 陳智章
• Other Authors: Char-Dir Chung
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/98199326788360619286

碩士 === 國立中央大學 === 電機工程研究所 === 90 === This thesis discusses more further results on diversity scheme[1]. In the first place, a new way for searching diversity codes is proposed in the first half part of this thesis. A closed form formula is derived for the cutoff rate of diversity codes for differential phase modulation in correlated Rayleigh fading channels. Using the cutoff rate as the code metric figure (CMF), useful short diversity codes are found by computer search and compared with the conventional diversity codes that are searched by using the codeword error probability as the CMF. Furthermore, it is worthwhile noting that multipath effects in wireless communication systems can be a great detriment to system performance. In the second half part of this thesis, it is analytically shown that the diversity systems employing the searched short-blocklength codes can offer remarkable gain in error performance on the multipath effects.