Patent ID: 7139334

Claim:
A receiver of a code-enhanced multiuser communications system comprising: a signal sampler for converting a received composite waveform signal to a digitized composite signal; a signal point to cluster mapper, coupled to said digitized composite signal, for calculating a closest pseudo-constellation point of said digitized composite signal and mapping said point to a specific phase and amplitude on a constellation diagram; a bit sum look-up table for receiving said closest pseudo-constellation point and generating a composite symbol bit sum; a multiuser convolutional decoder for decoding said composite symbol bit sum to generate individual user data streams; wherein said multiuser convolutional decoder comprises a deterministic loop for testing said bit sum, received from said bit sum lookup table, by state machine means for determining bits of said bit sum that are not ambiguous; and said multiuser convolution decoder comprises a guess loop for testing said bit sum after said deterministic loop test and performing guesses until all bits have been decided for each user.