COHERENT DETECTION OF INTERLEAVED TRELLIS ENCODED CPFSK ON SHADOWED MOBILE SATELLITE CHANNELS

被引：24

作者：

KERR, RW ^{[1
]}

MCLANE, PJ ^{[1
]}

机构：

[1] QUEENS UNIV,DEPT ELECT ENGN,KINGSTON K7L 3N6,ONTARIO,CANADA

来源：

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY | 1992年 / 41卷 / 02期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1109/25.142774

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：

To date, modems for use on fading land mobile satellite (MSAT) channel, which employ coherent detection and interleaving, have used forms of phase shift keying (PSK) for the modulation scheme. The objective of this paper is to present a receiver that utilizes trellis coded continuous phase frequency shift keying (CPFSK) with coherent detection and convolutional interleaving of the coded symbols. An earlier study considered trellis coded CPFSK with differential detection where decoding is based solely on the code trellis. A new decoding algorithm that copes with the interleaving is presented and uses information from both the modulation trellis and the code trellis. The performance results are obtained by Monte Carlo simulation and are partially verified through analysis. The fading model is Rician, but the line-of-sight (LOS) component is subjected to a log-normal transformation that represents attenuations due to foliage, which is referred to as shadowing. The main application for the receiver is to data transmission which requires a low bit error rate (BER) and has relaxed delay constraints relative to digital speech transmission. The system studied in not suitable for digital speech applications as the required interleaving depths lead to an unacceptable time delay.

引用

页码：159 / 169

页数：11

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