Repeat Problem 12.19 when fast frequency hopping is performed with L hops per coded bit and the decoder is a hard-decision Viterbi decoder. The L chips per coded bit are square-law-detected and combined prior to the hard decision.
Problem 12.19
Determine the error probability for an FH spread spectrum signal in which a binary convolutional code is used in combination with binary FSK. The interference on the channel is AWGN. The FSK demodulator outputs are square-law-detected and passed to the decoder, which performs optimum soft-decision Viterbi decoding as described in Chapter 8. Assume that the hopping rate is 1 hop per coded bit.