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FFH-BFSK multiuser detection in uncoordinated narrow-band FH systems

We propose a multiuser detection scheme for channelized fast frequency hopping with binary frequency shift keying in uncoordinated, narrow-band frequency hopping systems. "Multiuser" here means uncoordinated users and the desired user. This scheme consists of channel state detector and multiuser detector. Both detectors are Gaussian approximated energy combiners and are sub-optimal in the maximum a posteriori probability sense. In a symbol interval, the channel state detector first detects the existence of narrow-band frequency hopping signals for each chip, and then the multiuser detector properly combines the received chip energies to make the decision. Simulation results show the superiority of this scheme over other existing approaches.