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1. 发明申请

US20030223507A1 Coded digital modulation method for communication system 有权
标题翻译：通信系统编码数字调制方法
公开(公告)号：US20030223507A1
公开(公告)日：2003-12-04
申请号：US10163167
申请日：2002-06-04
申请人： Agence Spatiale Europeenne
发明人： Riccardo De Gaudenzi , Alberto Guillen i Fabregas , Alfonso Martinez Vicente , Beatrice Ponticelli
IPC分类号： H04L027/10 , H04L027/18 , H04L023/02 , H04L005/12
CPC分类号： H04L27/3411
摘要： A new class of 16-ary Amplitude and Phase Shift Keying (APSK) coded modulations, called double-ring APSK modulation, based on an amplitude and phase shift keying constellation in which the locations of the digital signals to be encoded are placed on two concentric rings of equally spaced signal points. The APSK constellation parameters are optimised so as to pre-compensate the impact of non-linearities. The new modulation scheme is suited for being used with different coding schemes. It is shown that, for the same coding scheme, pre-distorted double-ring APSK modulation significantly outperforms classical 16-QAM and 16-PSK over a typical satellite channel, due to its intrinsic robustness against the high power amplifier non-linear characteristics. The proposed coded modulation scheme is shown to provide a considerable performance advantage for future satellite multi-media and broadcasting systems.
摘要翻译：基于振幅和相移键控星座的新一代16位幅度和相移键控（APSK）编码调制，称为双环APSK调制，其中要编码的数字信号的位置放置在两个同心等距信号点的环。对APSK星座参数进行优化，以预补偿非线性的影响。新的调制方案适合于使用不同的编码方案。显示出，对于相同的编码方案，由于其对高功率放大器非线性特性的固有鲁棒性，预失真双环APSK调制在典型的卫星信道上显着优于经典的16-QAM和16-PSK。所提出的编码调制方案被显示为将来的卫星多媒体和广播系统提供了相当大的性能优势。

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