A Reduced Overhead OFDM Relay System with Clusterwise TMRC Beamforming

We consider a relay clustering system using decode and forward (DF) relaying, orthogonal frequency division multiplexing (OFDM), and transmit maximal ratio combining beamforming (TMRC-BF) at the relays. We address channel estimation at the destination for the above system. A cluster pairing scheme w...

Full description

Saved in:
Bibliographic Details
Published in:IEEE communications letters 2012-12, Vol.16 (12), p.1913-1916
Main Authors: Xie, B., Munoz, D., Minn, H.
Format: Article
Language:English
Subjects:
Access methods and protocols, osi model
Antennas
Applied sciences
Array signal processing
Channel estimation
Detection, estimation, filtering, equalization, prediction
Exact sciences and technology
Frequency division multiplexing
Information, signal and communications theory
Multiplexing
OFDM
pilot designs
Relay
relay cluster pairing
Relays
Signal and communications theory
Signal to noise ratio
Signal, noise
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Teleprocessing networks. Isdn
TMRC-BF
Transmission and modulation (techniques and equipments)
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We consider a relay clustering system using decode and forward (DF) relaying, orthogonal frequency division multiplexing (OFDM), and transmit maximal ratio combining beamforming (TMRC-BF) at the relays. We address channel estimation at the destination for the above system. A cluster pairing scheme with corresponding pilot designs is proposed. It reduces both necessary pilot overhead and computational complexity by half. Simulation results show that if the signal to noise ratio (SNR) of pilots for channel estimation for TMRC-BF at the relays is kept above a threshold (5 dB below the SNR of the pilots sent to the destination by the cluster pairing strategy), nearly optimal channel estimation performance can be achieved.
ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2012.101712.121450