Design of a low-complexity adaptive interference mitigating detector for DS/SS receivers in CDMA radio networks

被引:15
作者
De Gaudenzi, R [1 ]
Giannetti, F
Luise, M
机构
[1] European Space Agcy, European Space Res & Technol Ctr, RF Syst Div, NL-2200 AG Noordwijk, Netherlands
[2] Univ Pisa, Dept Informat Engn, I-56126 Pisa, Italy
关键词
adaptive signal detection; code-division multiaccess; interference suppression;
D O I
10.1109/26.655410
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Code-division multiple-access (CDMA) with direct-sequence/spread-spectrum (DS/SS) modulated signals emerged as a strong candidate for the air interface personal communication network planned for the end of the century, In this paper, we take into consideration a recently proposed low-complexity blind adaptive interference-mitigating detector (BALD) scheme that minimizes the detrimental effect of the multiple-access interference (IMAI) on the bit-error-rate (BER) performance of a CDMA data demodulator, We describe a few modifications to the original algorithm that make it more suitable to a practical implementation with dual-binary phase-shift keying (D-BPSK)-modulated DS/SS signals, Specifically, we show how to make the BAID invariant to a possible carrier phase offset introduced in the front-end of the data demodulator, and we also suggest how to increase the robustness of such detector to asynchronous MAI. The uncoded BER performance of the resulting "extended" detector is then evaluated theoretically and by computer simulation in the case of coherent and differential signal detection.
引用
收藏
页码:125 / 134
页数:10
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