نتایج جستجو برای: gaussian channel
تعداد نتایج: 294663 فیلتر نتایج به سال:
In many applications, the Middleton Class-A model is used to describe the impulsive noise. A very useful and interesting aspect for a channel affected by such, non-Gaussian noise, is to find an expression for the channel capacity. In this paper we present the calculation of capacity for a channel affected by additive Middleton Class-A noise (AWCN), with binary input. We considered the case when...
We consider the problem of transmission of several distributed correlated sources over a multiple access channel (MAC) with side information at the sources and the decoder. Source-channel separation does not hold for this channel. Sufficient conditions are provided for transmission of sources with a given distortion. The source and/or the channel could have continuous alphabets (thus Gaussian s...
Shannon’s entropy power inequality (EPI), e ) ≥ e + e ) for independent continuous random variables X and Y , with h(X) the differential entropy of X , has found many applications in Gaussian channel coding theorems. Equality holds iff both X and Y are Gaussian. For all the major applications of the EPI, it suffices to restrict Y to be Gaussian. The statement of this restricted EPI is that give...
Recently, there is an increased interest in the study of modulo analog to digital converters (ADCs). These new systems can reconstruct a signal whose amplitude much higher than conventional ADC's dynamic range. Modulo ADCs are characterized by their threshold and current literature, all existing works limited real-valued moduli. In this paper, we propose multi-channel samplers with complex-valu...
We prove that Gaussian operations are of no use for protecting Gaussian states against Gaussian errors in quantum communication protocols. Specifically, we introduce a new quantity characterizing any single-mode Gaussian channel, called entanglement degradation, and show that it cannot decrease via Gaussian encoding and decoding operations only. The strength of this no-go theorem is illustrated...
We extend a recently proposed wiretap coding scheme to the Gaussian wiretap channel and show that it is semantically-secure. Denoting by SNR the signal-to-noise ratio of the eavesdropper’s channel, the proposed scheme converts a transmission code of rate R for the channel of the legitimate receiver into a code of rate R− 0.5 log(1 + SNR) for the Gaussian wiretap channel. The conversion has a po...
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