Super-imposed pilot-aided channel estimation and power allocation for relay systems

Authors:
Gongpu Wang;Chintha Tellambura
Affiliations:
University of Alberta, Edmonton, Alberta, Canada;University of Alberta, Edmonton, Alberta, Canada
Venue:
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Year:
2009

Citing 4
Cited 1

On superimposed training for channel estimation: performance analysis, training power allocation, and frame synchronization

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A performance study of dual-hop transmissions with fixed gain relays

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Channel Estimation for Amplify and Forward Relay Based Cooperation Diversity Systems

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On channel estimation and optimal training design for amplify and forward relay networks

IEEE Transactions on Wireless Communications - Part 2

Superimposed training-based joint CFO and channel estimation for CP-OFDM modulated two-way relay networks

EURASIP Journal on Wireless Communications and Networking - Special issue on physical-layer network coding for wireless cooperative networks

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Abstract

Super-imposed pilots can be used as an alternative to traditional pilots that are used for channel estimation. Superimposed pilots improve bandwidth efficiency. We apply it to the Amplify and Forward (AF) relay systems. In this paper we give the channel estimation (CE) results, analyze the system performance, study the power allocation methods and extend our result to multi-hop relay systems. Our main contribution is that we suggest and prove the existence of minimum bit error rate (BER) as a function of pilot signal power, find the best power allocation ratio value that can reach the minimum BER, analyze parameters' influence on the ratio value, and extend our result to multi-hop systems.