|
|
|
| Optimal linear space-time multiuser detector for analychonous DS-CDMA systems |
| Wang Wenjie; Zhang Jianguo; Yin Qinye |
| Inst. of Info. Eng.,School of Electron. & Info. Bug.,Xi an Jiaotong Univ., Xi' an 710049 China |
|
|
|
|
Abstract A versatile signal model suitable for linear space-time multiuser detectors in asynchronous DS-CDMA systems is proposed. Based on the model, a versatile linear space-tine multiuser detector is presented and its optimal solution according to the Liner Constrained Minimum Variance (LCMV) criterion is deduced. The analyses of the existent linear multiuser detectors demonstrate that these methods are just the special cases of the versatile detector in this paper and can only achieve the suboptimal solution. Hence their interference canceling performance is inferior to the optimal detector in this paper. Finally, numerical simulations are presented.
|
|
Received: 16 June 2000
|
|
|
|
|
|
|
|
|
2002, Vol. 24 
