Performance of Coded FH/MFSK with a Quantizer-Limiter in a Worst-Case Partial Band Gaussian Interference Channel

The performance of coded FH/MFSK with a quantizerlimiter soft decision metric is presented for a worst-case two-level partial band Gaussian interference channel. This receiver structure is easy to implement and does not require side information concerning the on-off state of the interference. For a constraint length seven (K = 7), rate one-half (R = 1/2) convolutional code with Viterbi decoding, this receiver performs within 1.4 dB of the required Eb/No at Pb = 10^-5 when compared to an ideal unquantized soft decision receiver assisted by perfect side information. The cutoff rate parameter Ro is plotted versus channel symbol signal-to-noise ratio for alphabet sizes M = 2, 4, 8, 16, and 32.