In this paper, the k-th order autoregressive moving average (ARMA(k)) Gaussian wiretap channel with noiseless causal feedback is considered, in which an eavesdropper receives noisy observations of the signals in both forward and feedback channels. It is shown that a variant of the generalized Schalkwijk-Kailath scheme, a capacity-achieving coding scheme for the feedback Gaussian channel, achiev...

—In optical, magnetic recording and FrequencyHopping communication with narrow band interference, white Gaussian noise and random erasures are existing all at once. We call this mixed channel. To analyze performance of low density parity-check (LDPC) codes over mixed channel, the stability condition for LDPC codes over it is proposed, from which we can draw a conclusion that a good degree sequ...

Bounds are presented on Zi,i,d,-the achievable information rate for a discrete Gaussian channel with intersymbol interference (IS11 present and i.i.d. channel input symbols governed by an arbitrary predetermined distribution p , (x ) . Upper bounds on I , the achievable information rate with the symbol independence demand relaxed, are given as well. The bounds are formulated in terms of the ave...

In this paper, we investigate the capacity problem of Gaussian fading multiple access relay channel with orthogonal components from the senders to the relay receiver and from the senders and relay to the receiver. This model is motivated by the practical constraint that a node cannot send and receive at the same time or in the same frequency band. We derive a capacity region for the model where...

In this paper, some new results on the multiple-access wiretap channel (MAC-WT) are provided. Specifically, first, we investigate the degraded MAC-WT, where two users transmit their corresponding confidential messages (no common message) to a legitimate receiver via a multiple-access channel (MAC), while a wiretapper wishes to obtain the messages via a physically degraded wiretap channel. The s...

In this paper, we identify and quantify loss factors causing sub-optimal performance in joint source-channel coding. We show that both the loss due to non-Gaussian distributed channel symbols and the loss due to non-Gaussian quantization error equals the relative entropy between the actual distribution and the optimal Gaussian distribution, given an average power constraint and an mean-squared ...

In this paper, we propose to use Brownian motions to model families of continuoustime multiuser Gaussian channels without bandwidth limit. It turns out that such a formulation allows parallel translation of many fundamental notions and techniques from the discrete-time setting to the continuous-time regime, which enables us to derive the capacity regions of a continuous-time white Gaussian mult...

Interaction and Secrecy in Gaussian Diamond Relay Networks Wanyao Zhao Master of Applied Science Graduate Department of Electrical and Computer Engineering University of Toronto 2015 In this thesis, the physical layer secrecy for several Gaussian network models are studied. We first establish the secure degrees of freedom (d.o.f.) of helper-assisted Gaussian wiretap channel with shared keys bet...