All-digital PPM impulse radio for multiple-access through frequency-selective multipath

被引：10

作者：

Le Martret, CJ ^{[1
]}

Giannakis, GB ^{[1
]}

机构：

[1] Univ Minnesota, Dept Elect & Comp Engn, Minneapolis, MN 55455 USA

来源：

SAM 2000: PROCEEDINGS OF THE 2000 IEEE SENSOR ARRAY AND MULTICHANNEL SIGNAL PROCESSING WORKSHOP | 2000年

关键词：

D O I：

10.1109/SAM.2000.877960

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Impulse radio (IR) is an ultra-wideband system with attractive features for baseband asynchronous multiple access (MA), multimedia services, and tactical wireless communications. Implemented with analog components, the continuous-time IRMA model utilizes pulse-position modulation (PPM) and random time-hopping codes to alleviate multipath effects and suppress multiuser interference (MUI). We introduce a novel continuous-time PPM-IRMA model, deduce a low-complexity approximate one, and derive its discrete-time equivalent model. Relying on a time-division-duplex access protocol and orthogonal user codes, we design composite linear/non-linear receivers for the downlink. The linear step eliminates MUI deterministically and accounts for frequency-selective multipath while a Maximum Likelihood (ML) receiver achieves symbol detection.

引用

页码：22 / 26

页数：5

共 12 条

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