关键词: 幅度估计, 解相关判决反馈检测器, 判决排序, 误码性能

Abstract:

An iterative formula of the amplitude estimate is presented based on Cholesky decomposition for the signal power order. The decision arrangement in the order of decreasing amplitude is implemented by permutation matrix in decorrelating decision-feedback multiuser detector, it will make the strongest user get a very first decision. Performance analysis shows that the decision arrangement can improve the bit error rate (BER) performance of the detector. The simulation results accord with theoretical prediction which summarizes that the decision arrangement will enhance the BER performance of the weaker user and equalize that of the whole system.

Key words: amplitude estimate, decorrelating decision-feedback detector, decision arrangement, bit error rate