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cs.IT2008
Comparative Study of Open-loop Transmit Diversity Schemes for Four Transmit Antennas in Coded OFDM Systems
Chau Yuen, Yan Wu, Sumei Sun
We compare four open-loop transmit diversity schemes in a coded Orthogonal Frequency Division Multiplexing (OFDM) system with four transmit antennas, namely cyclic delay diversity…
cs.IT2008
Comparative Study of SVD and QRS in Closed-Loop Beamforming Systems
Chau Yuen, Sumei Sun, Jian-Kang Zhang
We compare two closed-loop beamforming algorithms, one based on singular value decomposition (SVD) and the other based on equal diagonal QR decomposition (QRS). SVD has the advanta…
cs.IT2008
Beamforming Matrix Quantization with Variable Feedback Rate
Chau Yuen, Sumei Sun, Mel Meau Shin Ho
We propose an improved beamforming matrix compression by Givens Rotation with the use of variable feedback rate. The variable feedback rate means that the number of bits used to re…