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The Impact of Pulsed RFI on the Coded BER Performance of the Nonlinear Satellite Communication Channel

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1 Author(s)
A. Weinberg ; Stanford Telecommunications, Inc., McLean, VA, USA

The coded bit error rate (BER) performance of a satellite communications system, wherein the satellite repeater contains an arbitrary nonlinearity and the system operates in the presence of pulsed radio frequency interference (RFI), is examined. A major result is an analytic method for determining soft decision statistics of the receiver demodulator output in which pulsed RFI effects are accounted for. It is further demonstrated how this result can be analytically applied to the approximate determination of the BER at the output of the Viterbi decoder when convolutional coding is employed. Computed results specialize the nonlinearity to either a hard limiter or clipper, in conjunction with an arbitrarily specified AM/PM characteristic. Performance curves examine BER sensitivity to RFI duty cycle, form of RFI (CW or noise), and various coding/decoding conditions.

Published in:

IEEE Transactions on Communications  (Volume:29 ,  Issue: 5 )