In this thesis , the zero correlation zone ( zcz ) or generalized orthogonal ( go ) sequences are applied to direct - sequence cdma ( ds - cdma ) systems , and the corresponding system performance are analysed . topics on the correlation property analysis of hadamard walsh ( wh ) sequences , go sequences , and loosely synchronous ( ls ) sequences are performed , and the system model and performance evaluation of single - cell and multi - cell synchronous cdma ( s - cdma ) systems employing go sequences , and the applications of go sequences in quasi - synchronous cdma ( qs - cdma ) systems are elaborated 本文研究了零相關(guān)區(qū)( zcz )或廣義正交( go )序列在直接序列碼分多址( ds - cdma )系統(tǒng)中的應(yīng)用并給出了系統(tǒng)性能分析結(jié)果,包括hadamardwalsh ( wh )序列集、廣義正交序列集與松散同步( ls )序列集相關(guān)特性分析,采用廣義正交序列的單小區(qū)與多小區(qū)同步cdma ( s - cdma )系統(tǒng)模型與性能分析,以及廣義正交序列在準同步cdma ( qs - cdma )系統(tǒng)中的應(yīng)用等問題。