Title :
Post-IDFT multidimensional beamforming for STC-OFDM systems
Author :
Liu, Hongwu ; Feng, Quanyuan
Author_Institution :
Southwest Jiaotong Univ., Chengdu
Abstract :
A post-inverse discrete Fourier transform (post-IDFT) multidimensional beamforming for space-time coded-orthogonal frequency division multiplexing (STC-OFDM) systems is proposed. By the combination of STC and post-IDFT beamforming, the proposed scheme has better performance than STC- OFDM system in the low signal-to-noise ratio (SNR) range and better tradeoff between performance and complexity. The proposed scheme also achieves the same space-diversity gain as the subcarrier beamforming, while keeping lower computational complexity and being easier to implement.
Keywords :
OFDM modulation; communication complexity; discrete Fourier transforms; diversity reception; interference (signal); space-time codes; STC-OFDM systems; computational complexity; inverse discrete Fourier transform; orthogonal frequency division multiplexing systems; post-IDFT multidimensional beamforming; signal-to-noise ratio; space-diversity gain; space-time coding; subcarrier beamforming; AWGN; Array signal processing; Discrete Fourier transforms; Eigenvalues and eigenfunctions; Frequency division multiplexing; Multidimensional systems; OFDM modulation; Receiving antennas; Transmitters; Transmitting antennas; OFDM; Space-time coding; beamforming; diversity;
Conference_Titel :
Microwave Conference, 2006. APMC 2006. Asia-Pacific
Conference_Location :
Yokohama
Print_ISBN :
978-4-902339-08-6
Electronic_ISBN :
978-4-902339-11-6
DOI :
10.1109/APMC.2006.4429829
