Adaptive Bit and Power Allocation for Two Hop OFDM-AF Relaying Systems

doi:10.13190/jbupt.200803.107.289

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2008, Vol. 31 ›› Issue (3): 107-110.doi: 10.13190/jbupt.200803.107.289

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Adaptive Bit and Power Allocation for Two Hop OFDM-AF Relaying Systems

ZHOU Ming-yu1,2, LI Li-hua1,2, ZHANG Ping1,2, ZHANG Xiao-xia1,2, WANG Hai-feng3

1. Key Laboratory of Universal Wireless Communications (Beijing University of Posts and Telecommunications), Ministry of Education, Beijing 100876, China; 2. Beijing University of Posts and Telecommunications Wireless Technology Innovation Institute, Beijing 100876, China; 3. Technology Platform, Nokia, Shanghai 200002, China

Received:2007-08-29 Revised:1900-01-01 Online:2008-06-28 Published:2008-06-28
Contact: ZHOU Ming-yu

Abstract

Abstract:

Adaptive bit and power allocation is introduced in two hop orthogonal frequency division multiplexing – amplify and forward (OFDM-AF) relaying systems. The optimization problem for bit and power allocation in the systems is presented. Aiming at the problem, an adaptive bit and power allocation algorithm is proposed, it takes advantage of the idea of Greedy algorithm to maximize throughput subject to the constraint of reliable transmission requirement and transmit power. Simulations indicate that the algorithm will improve the system availability greatly with guaranteeing reliable transmission.

Key words: relaying system, orthogonal frequency division multiplexing, amplify and forward, adaptive bit and power allocation

CLC Number:

TN911.2

ZHOU Ming-yu1,2, LI Li-hua1,2, ZHANG Ping1,2, ZHANG Xiao-xia1,2, WANG Hai-feng3
. Adaptive Bit and Power Allocation for Two Hop OFDM-AF Relaying Systems[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2008, 31(3): 107-110.

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Adaptive Bit and Power Allocation for Two Hop OFDM-AF Relaying Systems

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