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Optical Communications and a Comparison of Optical Technologies for a High DataRate Return Link from Mars

机译:光通信与火星高数据率返回链路的光学技术比较

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The important principles of direct- and heterodyne-detection optical free-spacecommunications are reviewed. Signal-to-noise-ratio (SNR) and bit-error-rate (BER) expressions are derived for both the direct-detection and heterodyne-detection optical receivers. For the heterodyne system, performance degradation resulting from received-signal and local oscillator-beam misalignment and laser phase noise is analyzed. Determination of interfering background power from local and

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