TY - JOUR
T1 - Differential modulation for cooperative wireless systems
AU - Zhao, Qiang
AU - Li, Hongbin
PY - 2007/5
Y1 - 2007/5
N2 - This paper examines differential binary modulation for wireless networks that utilize wireless relays to seek cooperative diversity and improved performance. Two differential cooperative transmission schemes, referred to as differential amplify-and-forward (DAF) and differential decode-and-forward (DDF), respectively, are introduced. These schemes require no channel state information at any node in the system. A set of analytical results pertaining to the probability density function of the instantaneous signal-to-noise ratio, average bit error rate, outage probability, and diversity order of the proposed schemes in Rayleigh fading channels are obtained. The analytical results are confirmed by numerical simulations. It is shown that the differential cooperative DAF and DDF schemes achieve cooperative diversity and outperform the conventional noncooperative differential modulation.
AB - This paper examines differential binary modulation for wireless networks that utilize wireless relays to seek cooperative diversity and improved performance. Two differential cooperative transmission schemes, referred to as differential amplify-and-forward (DAF) and differential decode-and-forward (DDF), respectively, are introduced. These schemes require no channel state information at any node in the system. A set of analytical results pertaining to the probability density function of the instantaneous signal-to-noise ratio, average bit error rate, outage probability, and diversity order of the proposed schemes in Rayleigh fading channels are obtained. The analytical results are confirmed by numerical simulations. It is shown that the differential cooperative DAF and DDF schemes achieve cooperative diversity and outperform the conventional noncooperative differential modulation.
KW - Average bit error rate (BER)
KW - Cooperative diversity
KW - Differential modulation
KW - Outage probability
KW - Wireless relays
UR - http://www.scopus.com/inward/record.url?scp=34247877539&partnerID=8YFLogxK
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U2 - 10.1109/TSP.2006.890922
DO - 10.1109/TSP.2006.890922
M3 - Article
AN - SCOPUS:34247877539
SN - 1053-587X
VL - 55
SP - 2273
EP - 2283
JO - IEEE Transactions on Signal Processing
JF - IEEE Transactions on Signal Processing
IS - 5 II
ER -