A deterministic multiuser code-timing estimator for long-code band-limited CDMA systems

被引：0
|
作者：
Wang, RS [1 ]
Li, HB [1 ]
机构：
[1] Stevens Inst Technol, Dept Elect & Comp Engn, Hoboken, NJ 07030 USA
来源：
IEEE COMMUNICATIONS LETTERS | 2004年 / 8卷 / 08期
关键词：
aperiodic/long spreading codes; band-limited chip waveforms; code-division multiple access (CDMA); parameter estimation; synchronization;
D O I：
10.1109/LCOMM.2004.833818
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
In this letter, we present a deterministic multiuser code-timing estimator for asynchronous direct-sequence (DS) code-division multiple-access (CDMA) systems with aperiodic long spreading codes and band-limited chip waveforms. A key feature of the proposed estimator is that it captures and capitalizes a deterministic structure of the overall interference, namely multiaccess interference (MAI) and intersymbol interference (ISI), in the frequency domain. This allows complete interference elimination in a deterministic manner, which is in general more effective and data-efficient than stochastic approaches. Numerical results show that the proposed estimator can achieve fast acquisition; it is also near-far resistant, providing accurate code acquisition for even overloaded systems (i.e., systems with more users than the processing gain) in multipath fading environments.
引用
收藏
页码：535 / 537
页数：3
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