Using ideas from Chu and Bode/Fano theories, we characterize the maximum achievable rate over single-input single-output wireless communication channels under a restriction on antenna size at receiver. By employing circuit-theoretic multiport models for radio systems, derive information-theoretic limits of compact antennas. We first describe an equivalent Chu’s circuit physical realizability co...

This paper aims at investigating the superiority of power allocation strategies, based on calculus of variations in a point-to-point two-way relay-assisted channel incorporating the amplify and forward strategy. Single and multilayer coding strategies for two cases of having and not having the channel state information (CSI) at the transmitters are studied, respectively. Using the notion of cal...

An achievable rate for the discrete memoryless relay channel with receiver-transmitter feedback is proposed based on Block-Markov superposition encoding. The achievable rate can also be extended to Gaussian channels. A second achievable rate for the Gaussian relay channel based on a Schalkwijk-Kailath type scheme is presented. For some channels both achievable rates strictly improve upon all pr...

This paper introduces a novel information-theoretic approach for studying the effects of mutual coupling (MC), between transmit and receive antennas, on overall performance single-input-single-output (SISO) near-field communications (NFC). By incorporating finite antenna size constraint using Chu’s theory under assumption canonical-minimum scattering (CMS), we derive MC two radiating volumes fi...

In a premier paper on the information-theoretic analysis of a two-user cognitive interference channel (CIC) [1], Devroye et al. presented an achievable rate region for the two-user discrete memoryless CIC. The coding scheme proposed by Devroye et al. is correct but unfortunately some rate-terms in the derived achievable rate region are incorrect (in fact incomplete) because of occurring some mi...

In this letter, we study the wireless point-to-point communication from a transmitter (Tx) to receiver (Rx), which is jointly aided by an active intelligent reflecting surface (AIRS) and passive IRS (PIRS). We consider two practical transmission schemes deploying IRSs in different orders, namely, Tx <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/19...