An Analysis of Linear and Non-Linear Coherent Detection in Atmospheric Noise at Very Low Frequency
ROME AIR DEVELOPMENT CENTER GRIFFISS AFB NY
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The report is concerned with the performance analysis of coherent modems in atmospheric noise. Specifically, Phase Shift Keying PSK, biphase, Coherent Frequency Shift Keying CFSK, and Minimum Shift Keying MSK modems are described and analyzed for error rate performance in the non-Gaussian, impulsive atmospheric noise typical of a very low frequency VLF radio communication channel. The analyses include both linear and non-linear band-pass, hard-limiting pre-detection signal processing. In each case, experimentally derived error rate performance data is presented which shows close agreement with the computational results of the analyses.
- Electrical and Electronic Equipment
- Radio Communications