parameters on the capacity of fixed-gain AF dual-hop relaying systems. Index Terms—Amplify-and-forward (AF) relaying, dual-hop transmission, ergodic capacity, fading channels. I.

to better ap-proximate the Nakagami-m/lognormal model, compared with the Nakagami-m/gamma model. We study both fixed- and variable-gain relaying systems and present analytical upper and lower bounds for the ergodic capacity of dual-hop relaying systems with not necessarily identical hops; these bounds

) or decode-and-forward (DF) modes. For each protocol, we study the ergodic and outage capacity behavior (assuming Gaussian code books) under the AF and DF modes of relaying. We analyze the spatial diversity performance of the various protocols and find that full spatial diversity (second-order in this case

Efficient performance bounds for multihop wireless communications systems with non-regenerative fixed-gain relays operating over non-identical generalized fading channels, are presented. More specifically, the end-to-end signal-to-noise ratio (SNR) is formulated and upper bounded by using the well

Abstract: In this paper, we investigate the end-to-end performance of a dual-hop fixed gain relaying system with semi-blind relay under asymmetric fading environments. In such environments, the wireless links of the considered system un-dergo asymmetric multipath/shadowing fading conditions, where

We consider three-node wireless relay channels in a Rayleigh-fading environment. Assuming transmitter channel state information (CSI), we study upper bounds and lower bounds on the outage capacity and the ergodic capacity. Our studies take into account practical constraints on the transmission

Abstract — Efficient performance bounds for multihop wireless communications systems with non-regenerative fixed-gain relays operating over non-identical generalized fading channels, are presented. More specifically, the end-to-end signal-to-noise ratio (SNR) is formulated and upper bounded

fundamental design guidelines for selecting hardware that satisfies the requirements of a practical relaying system. Index Terms—Amplify-and-forward, decode-and-forward, dual-hop relaying, ergodic capacity, Nakagami-m fading, outage probability, transceiver hardware impairments. I.

Abstract not found

that researchers are currently resolving. The current state of the art of sensor networks is captured in this article, where solutions are discussed under their related protocol stack layer sections. This article also points out the open research issues and intends to spark new interests and developments