The main works of the dissertation can be summarized as follows : 1 . by exploring the model of ds-cdma systems, the performances of the decorrelating multi-user detector and minimum mean square error ( mmse ) multi-user detector are studied . further, the performances of blind adaptive mud and adaptive mmse mud ( lms style ) with fixed step size and varied step size respectively are studied based on mmse linear detect algorithms 本文主要研究次最優(yōu)的線性多用戶檢測(cè)技術(shù),工作具體如下:從ds-cdma系統(tǒng)模型出發(fā),研究了解相關(guān)多用戶檢測(cè)器和mmse多用戶檢測(cè)器的性能,并以mmse線性檢測(cè)技術(shù)為基礎(chǔ),研究了變步長(zhǎng)和固定步長(zhǎng)的lms-mmse自適應(yīng)多用戶檢測(cè)器和基于最小輸出能量準(zhǔn)則的盲自適應(yīng)多用戶檢測(cè)器。