Coding and modulation techniques for high speed data services by satellite

M. Rice, P. Gray, A. Barbulescu
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引用次数: 11

Abstract

Data traffic in satellite systems is likely to increase, similar to the trend in terrestrial systems. In particular, demand for high speed data services will increase. These new services require more power and bandwidth than is currently required for speech and low rate data/fax services. High order modulation schemes such as 8 PSK and 16 QAM, when combined with turbo coding provide a good solution in terms of both power and bandwidth efficiency. Moreover, the low operating signal to noise ratio (SNR) of such schemes increases their robustness to interference and distortion. Key issues such as delay, complexity and performance are discussed indicating that significant gains are possible for current and future high speed data services provided by satellite.
卫星高速数据业务的编码和调制技术
卫星系统的数据流量可能会增加,与地面系统的趋势类似。特别是对高速数据服务的需求将会增加。这些新服务需要比当前语音和低速率数据/传真服务更多的功率和带宽。高阶调制方案,如8 PSK和16 QAM,当与turbo编码相结合时,在功率和带宽效率方面都提供了很好的解决方案。此外,这些方案的低信噪比提高了它们对干扰和失真的鲁棒性。讨论了延迟、复杂性和性能等关键问题,表明卫星提供的当前和未来高速数据服务有可能取得重大进展。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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