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A K-user direct-sequence spread-spectrum code-division multiple-access (CDMA) system with (q log 2 K)-bit baseband signal quantization at the demodulator is considered. It is shown that additionally quantizing the K + 1 level output signal of the CDMA modulator into q bits improves significantly the average bit-error performance in a non-negligible regime of noise variance, σ 2 , and user load, β, under various system settings, like additive white Gaussian noise (AWGN), Rayleigh fading,doi:10.1088/1751-8113/41/36/365004 fatcat:2g4tvjxy3vgbnm3zeuopygqzli