THE DEVELOPMENT OF A CODED 8 PSK MODEM USING DIGITAL SIGNAL PROCESSORS

被引：0
|
作者：
HERON, R
MARSTON, P
GARRETT, P
REECE, I
机构：
[1] Communication Systems Research Ltd, United Kingdom
来源：
INTERNATIONAL JOURNAL OF SATELLITE COMMUNICATIONS | 1989年 / 7卷 / 02期
关键词：
Codes; Symbolic--Encoding - Modems - Signal Processing--Digital Techniques;
D O I：
10.1002/sat.4600070202
中图分类号：
V [航空、航天];
学科分类号：
08 ; 0825 ;
摘要：
A prototype 64 kb/s coded eight phase shift key (C8PSK) modem has been successfully developed using a combination of conventional analogue circuitry and software-based digital signal processing. The C8PSK scheme is fully compatible regarding interference criteria with existing satellite FDMA access requirements and offers more efficient use of the satellite resource than conventional quaternary PSK (QPSK) systems. The prototype modem was developed in a general way so that other PSK modulation schemes could be accommodated by replacing PROM units. Software processing also allows adaptive operation which adjusts the processing technique to optimize operation for a degraded signal-to-noise environment.
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页码：67 / 77
页数：11
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