A decoder architecture for high-speed free-space laser communications

被引：10

作者：

Cheng, M ^{[1
]}

Nakashima, M ^{[1
]}

Hamkins, J ^{[1
]}

Moision, B ^{[1
]}

Barsoum, M ^{[1
]}

机构：

[1] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

来源：

Free-Space Laser Communication Technologies XVII | 2005年 / 5712卷

关键词：

laser communication; error correction code; turbo codes; MAP decoding; FPGA implementation;

D O I：

10.1117/12.591043

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

We present a decoding architecture for high-speed free-space laser communications. This system will be used by NASA's Mars Laser Communication Demonstration (MLCD) project, the first use of high-speed laser communication from deep space. The Error Correction Code (ECC) and modulation techniques for this project have been motivated by an analysis of capacity, and existing designs have been shown to operate within 0.9 dB of the Shannon limit on the nominal operating point. In this paper, we give the algorithmic description and FPGA implementation details that led to the development of a 50 Mbps hardware decoder.

引用

页码：174 / 185

页数：12

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