Differential modulation for two-user cooperative diversity systems

This paper introduces a novel differential modulation scheme for a two-user cooperative diversity system which does not require channel state information at either the users or the destination. The performance of fixed decode-and-forward and selection relaying protocols is evaluated in both symmetri...

Full description

Saved in:
Bibliographic Details
Published in:IEEE journal on selected areas in communications 2005-09, Vol.23 (9), p.1891-1900
Main Authors: Tarasak, P., Hlaing Minn, Bhargava, V.K.
Format: Article
Language:English
Subjects:
Asymmetric interuser channels
Asymmetry
Block codes
Channel estimation
Channel state information
Channels
cooperative diversity
decode-and-forward relaying
Decoding
differential modulation
Digital relays
Errors
Frequency diversity
Gain
Lower bounds
Mobile antennas
Modulation
Multiaccess communication
Performance gain
Protocols
Relaying
selection relaying
Signal to noise ratio
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:This paper introduces a novel differential modulation scheme for a two-user cooperative diversity system which does not require channel state information at either the users or the destination. The performance of fixed decode-and-forward and selection relaying protocols is evaluated in both symmetric and asymmetric interuser-channel cases. The lower bound on the performance of the decode-and-forward protocol is given, while the exact bit-error probability of the selection relaying protocol is thoroughly derived. The decode-and-forward relaying protocol achieves a performance gain when the signal-to-noise ratios in the interuser channels are symmetric and sufficiently high. The selection relaying protocol shows a larger performance gain and does not exhibit an error floor like in the case of the decode-and-forward protocol. In addition, it is robust to the asymmetric interuser channels.
ISSN:0733-8716
1558-0008
DOI:10.1109/JSAC.2005.853792