Optimum energy allocation for cooperative networks with differential modulation

Woong Cho, Liuqing Yang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations


The development of relay transmissions have recently attracted increasing interests in wireless communications since they provide cooperative diversity gains by forming virtual antenna arrays. In such relay networks, optimum energy allocation is critical to enhance their performance and efficiency. However, existing works on performance analysis and optimization mainly focus on single-relay systems. In this paper, an upper bound of the error performance is derived with arbitrary number of relays. Based on this bound, we then develop the optimum energy allocation schemes that minimize the average system error. Equally attractive is that our investigation is tailored for differential modulations, which bypass the channel estimation at the receiver and are particularly suitable for wireless relay networks. The performance improvement of the optimized systems over the un-optimized ones is confirmed by analytical and simulated comparisons.

Original languageEnglish (US)
Title of host publicationMilitary Communications Conference 2006, MILCOM 2006
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)1424406188, 9781424406180
StatePublished - 2006
Externally publishedYes
EventMilitary Communications Conference 2006, MILCOM 2006 - Washington, D.C., United States
Duration: Oct 23 2006Oct 25 2006

Publication series

NameProceedings - IEEE Military Communications Conference MILCOM


OtherMilitary Communications Conference 2006, MILCOM 2006
Country/TerritoryUnited States
CityWashington, D.C.


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