Title :
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.
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;
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
DOI :
10.1109/CHINACOM.2006.344801
