A contemporary perspective on the tradeoff between transmit antenna diversity and spatial multiplexing is provided. It is argued that, in the context of most modern wireless systems and for the operating points of interest, transmission techniques t
Abstract—We present a multi-layer protocol based on power control and virtual Multi-Input Single-Output (VMISO). Specifically, we discuss the influence of rate, cluster size, and transmission range of the VMISO link on the whole performance improvem
The authors consider a cooperative communication system where multiple sources transmit data to multiple destinations, being helped by multiple half-duplex relay nodes: relay nodes perform ‘amplify and forward’ as their cooperative technique, with t
Mobile users’ data rate and quality of service are limited by the fact that, within the duration of any given call, they experience severe variations in signal attenuation, thereby necessitating the use of some type of diversity. In this two-part pa
This is the second in a two-part series of papers on a new form of spatial diversity, where diversity gains are achieved through the cooperation of mobile users. Part I described the user cooperation concept and proposed a cooperation strategy for a
An Adaptive Cooperation Diversity Scheme With Best-Relay Selection in Cognitive Radio Networks An Adaptive Cooperation Diversity Scheme With Best-Relay Selection in Cognitive Radio Networks An Adaptive Cooperation Diversity Scheme With Best-Relay Se
This paper presents a simple two-branch transmit diversity scheme. Using two transmit antennas and one receive antenna the scheme provides the same diversity order as maximal-ratio receiver combining (MRRC) with one transmit antenna, and two receive
MATLAB based code of receiver diversity techniques, including selection combing, equal gain, and maximum combing. Comparison of BER performance can be plotted by the code.
To eectively combat multipath fading across multiple protocol layers in wireless networks, this dissertation develops energy-ecient algorithms that employ certain kinds of cooperation among terminals, and illustrates how one might incorporate these
