We investigate the joint source–channel coding (JSCC) excess distortion exponent (the exponent of the probability of exceeding a prescribed distortion level) for some memoryless communication systems with continuous alphabets. We first establish upper and lower bounds for for systems consisting of a memoryless Gaussian source under the squared-error distortion fidelity criterion and a memoryles...

We investigate the joint source-channel coding (JSCC) excess distortion exponent EJ (the exponent of the probability of exceeding a prescribed distortion level) for memoryless communication systems with continuous alphabets. We first establish upper and lower bounds for EJ for systems consisting of a memoryless Gaussian source under the squared-error distortion fidelity criterion and a memoryle...

In this work, the design of a -bit (scalar and vector) soft-decision demodulator for Gaussian channels with binary phase-shift keying modulation is investigated. The demodulator is used in conjunction with a soft-decision channel-optimized vector quantization (COVQ) system. The COVQ is constructed for an expanded ( 1) discrete channel consisting of the concatenation of the modulator, the Gaussi...

The capacity region of the two-user Gaussian CDMA channel is shown to be achievable when the (stationary, ergodic) noise is not Gaussian, using a decoder matched to the Gaussian distribution. Similarly, the capacity of the exponential server timing channel is shown to be achievable when the service distribution is not exponential, using a decoder matched to the exponential distribution. The cod...