User Cooperation in TDMA Wireless System

Abstract

Reliability of radio link is limited, owing to path loss, shadowing and multi-path fading. This necessitates the use of a certain type of diversity. In recent years, cooperative diversity has gained considerable attention.Here, wireless nodes cooperate in such a way that they share their antennas and other resources, to create a virtual array through distributed transmission and signal processing. This increases coverage and reduces transmitted power, thereby bringing down co-channel interference, which results in increased system capacity. This paper gives an overview of the state of art of various cooperation schemes and issues related to their implementation.

A Review on Cooperative Communication Protocols in Wireless World

“…An overview of various cooperation schemes related to their implementation has been discussed in [40] . In [41] , closed form expressions of OP and bit error rate (BER) for binary phase shift keying (BPSK) are derived for case where communication between source and destination is supported by multiple-antenna relay and both relay and destination performs MRC of signals in Rayleigh fading channel.…”

Performance Analysis of Multi Hop Relay Network in Rayleigh Fading

“…In [10], closed form expressions of average bit error rate, amount of fading and outage probability have been derived for Rayleighfading channel where relay works in non-regenerative mode and destination performs equal gain combining. An overview of various cooperation schemes and issues related to their implementation has been discussed in [11]. Various power allocation strategies for non-generative relay network have been studied in [12].…”