Increasing user capacity by interference avoidance and intentional asynchrony in CDMA systems

被引：1

作者：

Hombs, Brandon ^{[1
]}

Lehnert, James S. ^{[2
]}

机构：

[1] BAE Syst Adv Syst & Technol, Merrimack, NH 03061 USA

[2] Purdue Univ, Dept Elect & Comp Engn, W Lafayette, IN 47907 USA

来源：

IEEE TRANSACTIONS ON INFORMATION THEORY | 2008年 / 54卷 / 04期

关键词：

code-division multiple access (CDMA); interference avoidance; user capacity;

D O I：

10.1109/TIT.2008.917677

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

This correspondence examines the number of users that can be supported at a given signal-to-interference ratio in asynchronous direct-sequence code-division multiple-access (DS-CDMA) systems. It is shown that for many chip waveforms the user capacity for asynchronous systems is larger than for optimally designed synchronous systems. The degree to which the user capacity improves by exploiting asynchrony is characterized by defining the effective dimension of the chip waveform. Finally, simulation results are shown to verify the analysis.

引用

页码：1754 / 1760

页数：7

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