Adaptive Power Allocation for OFDM Systems with Joint Tx-Rx Beamforming

Author

Liu, Hongwu ; Li, Ji

Author_Institution

Sch. of Inf. Sci. & Technol., Southwest Jiaotong Univ.

fYear

2006

fDate

25-27 Oct. 2006

Firstpage

1

Lastpage

5

Abstract

Orthogonal frequency division multiplexing (OFDM) is a promising scheme for broadband wireless communications. The combination of joint transmit-receive (Tx-Rx) beamforming with OFDM promises an enhanced performance. Two kinds of adaptive power allocation schemes are proposed for OFDM systems with joint Tx-Rx beamforming. The optimal power allocation schemes are based on the criterions of maximizing signal-to-noise ratio (SNR) and maximizing average throughput, respectively. Simplified schemes with complexity reduction are also presented. The performance potentials of the proposed schemes are demonstrated by simulation results

Keywords

OFDM modulation; antenna arrays; broadband networks; matrix algebra; radio networks; OFDM systems; SNR; Tx-Rx beamforming; adaptive power allocation; broadband wireless communications; orthogonal frequency division multiplexing; signal-to-noise ratio; transmit-receive beamforming; Adaptive arrays; Array signal processing; Fading; Information science; MIMO; OFDM; Power system modeling; Receiving antennas; Throughput; Transmitting antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications and Networking in China, 2006. ChinaCom '06. First International Conference on

Conference_Location

Beijing

Print_ISBN

1-4244-0463-0

Electronic_ISBN

1-4244-0463-0

Type

conf

DOI

10.1109/CHINACOM.2006.344801

Filename

4149766