异步WCDMA上行链路用户数估计
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摘要
针对非合作通信场景中异步WCDMA上行链路用户数估计问题,提出了基于载波调制混合矩阵WCDMA系统用户数估计的方法。将接收到的长码扩频载波调制WCDMA信号建模成短码载波调制混合矩阵模型,经过公式推导得到异步WCDMA信号中的用户数目与信号协方差矩阵中信号特征值个数的关系,然后设置判定门限来获得协方差矩阵中的信号特征值个数,进而估计出用户个数。理论分析和仿真结果表明:算法能有效识别载波调制WCDMA信号中的用户数目。
Aiming at the problem of user number estimation of asynchronous WCDMA uplink signal in non-cooperative communication scenarios,a method for estimating the number of users in WCDMA system based on carrier modulation hybrid matrix is proposed.In this method,the received long-code spread-spectrum WCDMA signal modulated by carrier is modeled as a mixed matrix model of short code carrier modulation,by analyzing the relationship between the signal eigenvalues and the number of users in the covariance matrix of the WCDMA signal mixing matrix,the number of users is estimated.Theoretical analysis and simulation results show that the proposed method is effective for estimating the number of users of WCDMA signals modulated by carrier.
Aiming at the problem of user number estimation of asynchronous WCDMA uplink signal in non-cooperative communication scenarios,a method for estimating the number of users in WCDMA system based on carrier modulation hybrid matrix is proposed.In this method,the received long-code spread-spectrum WCDMA signal modulated by carrier is modeled as a mixed matrix model of short code carrier modulation,by analyzing the relationship between the signal eigenvalues and the number of users in the covariance matrix of the WCDMA signal mixing matrix,the number of users is estimated.Theoretical analysis and simulation results show that the proposed method is effective for estimating the number of users of WCDMA signals modulated by carrier.
引文
[1]李淼.长码直扩信号多伪码盲估计[D].杭州:杭州电子科技大学,2016.
[2]贺广龙.DS/CDMA信号盲检测技术研究[D].成都:电子科技大学,2005.
[3]HUANG L,LONG T,WU S.Source enumeration for High-Resolution array processing using improved Gerschgorin Radii without eigendecomposition[J].IEEE Transactions on Signal Processing,2008,56(12):5916-5925.
[4]刘飞.DS/CDMA信号盲检测与分离技术研究[D].成都:电子科技大学,2006.
[5]HAGHIGHAT A,SOLEYMANI M R.A blind MUSIC-based algorithm for user identification in multiuser DS-CDMA[C]//Global Telecommunications Conference,2003.GLOBECOM′03.IEEE,2003:2447-2452.
[6]马瑞琪.DS-CDMA信号盲解扩关键技术研究[D].西安:西安电子科技大学,2011.
[7]尹涛,杨东升,郑好望.WCDMA物理信道技术[J].现代电子技术,2006(21):62-64.
[2]贺广龙.DS/CDMA信号盲检测技术研究[D].成都:电子科技大学,2005.
[3]HUANG L,LONG T,WU S.Source enumeration for High-Resolution array processing using improved Gerschgorin Radii without eigendecomposition[J].IEEE Transactions on Signal Processing,2008,56(12):5916-5925.
[4]刘飞.DS/CDMA信号盲检测与分离技术研究[D].成都:电子科技大学,2006.
[5]HAGHIGHAT A,SOLEYMANI M R.A blind MUSIC-based algorithm for user identification in multiuser DS-CDMA[C]//Global Telecommunications Conference,2003.GLOBECOM′03.IEEE,2003:2447-2452.
[6]马瑞琪.DS-CDMA信号盲解扩关键技术研究[D].西安:西安电子科技大学,2011.
[7]尹涛,杨东升,郑好望.WCDMA物理信道技术[J].现代电子技术,2006(21):62-64.