摘要
本文以线性解相关多用户检测为基础，提出了一种新的相干CDMA多用户检测方案．这种方案引入辅助的连续导频，使相干估计和话音间歇内的定时容易实现．引入自动时延控制并减小相关时间，使相关结果与前后码元无关．采用话音激活，又使解相关矩阵的阶降低65％，求逆计算复杂性降低95．71％．理论分析和模拟结果证明本方案不但计算复杂性大大降低，系统性能也得到了改善．
Based on the decorrelating linear multiuser detection (DCLMUD) scheme, a new coherent CDMA multiuser scheme is pmposed. It introduces aided continuous pilot to implement the coherent estimation and timing recovery. In addition, auto time delay control is inedced and the cedation time is rcduced to make the correlation independent on the past and future sndls. By adapting voice activation, the order of decorrelating matrix is reduced by 65 %, computahon complexity is reduced by 95 .71%. The theoretical analysis and simulation results prove that not only the complexity of the proposed scheme is reduced significantly, but also its performance is improved.
出处
《电子学报》
EI
CAS
CSCD
北大核心
1998年第1期65-69,共5页
Acta Electronica Sinica
