Joint Source Channel Coding With Side Information Using Hybrid Digital Analog Codes

On the transmission of a Gaussian source over an AWGN channel with correlated interference

“…Coding) [19] In [18] by defining a new auxiliary random variable U = X + αS, where X is independent of S (interference) and α = P P +N , Costa shows that the capacity for an AWGN channel corrupted by an i.i.d. Gaussian interfering signal known only at the transmitter is the same as when the interfering signal does not exist.…”

“…Hybrid digital-analog (HDA) coding schemes: In order to exploit the advantages of both analog transmission and digital techniques, a family of HDA schemes were introduced in the literature, see e.g., [10], [11], [12], [13], [7], [14], [15], [16], [17]. These methods usually offer better distortion performance than the purely analog or digital schemes; they do not suffer from the leveling-off effect, have a less severe threshold effect [12] compared to digital tandem sourcechannel coding schemes, and they can asymptotically achieve Shannon's OPTA limit at the designed CSNR.…”

“…What is noticeable here is that performance of this system does not improve when there is SNR mismatch in the channel or there is a correlation between the source and the interference. In 2007, Wilson et al [15], [19] introduce some new hybrid digital analog schemes with the assumption of uncorrelated interference and source that not only can achieve the minimum distortion but also have better performance when there is SNR mismatch in the channel.…”

Secure joint source–channel coding with interference known at the transmitter

“…For a fixed information leakage rate to the eavesdropper, [26] has shown that superimposing the secure digital signal with the analogue (quantisation error) part has better performance compared with the separation-based scheme and the uncoded scheme. In [27], the problem of transmitting a Gaussian source over a (non-secure) Gaussian channel with side information is studied. Wilson and Narayanan [27] has introduced several hybrid digital -analogue forms of the Costa and Wyner -Ziv coding [28] schemes.…”

“…In [27], the problem of transmitting a Gaussian source over a (non-secure) Gaussian channel with side information is studied. Wilson and Narayanan [27] has introduced several hybrid digital -analogue forms of the Costa and Wyner -Ziv coding [28] schemes. In [27], the results of Bross et al [29] are extended to the case in which the transmitter or receiver has side information, and have shown that there are infinitely many schemes for achieving the optimal distortion.…”