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

页码：535 / 537

页数：3

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