Performance of Noncoherent MFSK Channels with Coding

• Main Authors: Butman, S. A., Lyon, R. F.
• Other Authors: California Institute of Technology
• Language: en_US
• Published: International Foundation for Telemetering 1974
• Online Access: http://hdl.handle.net/10150/608954; http://arizona.openrepository.com/arizona/handle/10150/608954

International Telemetering Conference Proceedings / October 15-17, 1974 / International Hotel, Los Angeles, California === Computer simulation of data transmission over a noncoherent channel with predetection signal-to-noise ratio ST/N₀ = 1 shows that convolutional coding can reduce the energy requirement by 4.5 dB at a bit error rate of 0.001. The effects of receiver quantization and choice of number of tones are analyzed; nearly optimum performance is attained with eight quantization levels and sixteen tones at ST/N₀ = 1. The effects of changing ST/N₀ are also analyzed; for lower ST/N₀, accurate extrapolations can be made from the data, but for higher ST/N₀ the results are more complicated. These analyses will be useful in designing telemetry systems when coherence is limited by turbulence in the signal propagation medium or oscillator instability.