A NOVEL DETECTION METHOD FOR WEAK M-ARY SIGNALS IN ULTRA WIDEBAND MULTIPLE ACCESS SYSTEMS

A new detection method appropriate for weak M-ary signals in a ultra wideband multiple access system is provided to be capable of having the smallest error probability when the strength of signals gets near to 0, and of realizing a simpler structure and almost the same performance compared to an optimum detector based on maximally similar detection standards. A demodulator receives a reception signal r(t) in N-dimensional vectors. A detector determines signals sent in every symbol section Ts. The demodulator integrates the reception signal r(t) by multiplying the reception signal r(t) by an orthogonal-based function, and conducts a detection function on the basis of the outputted signal.