As a low-cost and low-power-consumption passive reflector, intelligent reflecting surface (IRS) can make significant rate improvement by building programmable wireless environment. To improve the performance coverage range of networks, an IRS-aided decode-and-forward (DF) relay network is proposed with multiple antennas at station (RS). achieve high rate, alternately iterative structure (AIS) m...

This paper demonstrates the significant gains that multi-access users can achieve from sharing a single amplify-forward relay in slow fading environments. The proposed protocol, namely the multiaccess relay amplify-forward, allows for a low-complexity relay and achieves the optimal diversitymultiplexing trade-off at high multiplexing gains. Analysis of the protocol reveals that it uniformly dom...

A symmetric butterfly network (BFN) with a full-duplex relay operating in a bi-directional fashion for feedback is considered. This network is relevant for a variety of wireless networks, including cellular systems dealing with cell-edge users. Upper bounds on the capacity region of the general memoryless BFN with feedback are derived based on cut-set and cooperation arguments and then speciali...

In this work we focus on the general relay channel. We present a new coding strategy that yields a rate increase over the point-to-point rate for any channel conditions without the use of auxiliary random variables. Specifically, even when Cover & El-Gamal’s decode-and-forward or estimate-and-forward strategies do not exceed the point-to-point rate, our method results in a rate to the destinati...