Title :
Optimized non-unitary linear precoding for orthogonal space-time block codes
Author :
Huang, Haiyang ; Wu, Gang ; Li, Shaoqian
Author_Institution :
Nat. Key Lab. of Commun., Univ. of Electron. Sci. & Technol. of China, Chengdu
fDate :
6/1/2009 12:00:00 AM
Abstract :
This letter proposes a novel optimized non-unitary linear precoding design for orthogonal space-time block codes (OSTBCs). We dig out the transmission potentials by the analysis from eigen-space point of view according to the unique structure of OSTBCs. The proposed precoding form is proved to be theoretically optimized. Compared with the classical unitary Grassmannian codebook design, in the sense of restriction on the time average power of transmit signal, the proposed non-unitary codebook further improves the overall performance of practical systems. The new constraint on codebook size to guarantee full diversity order is given and proved. The advantages of our proposed design are verified in the numerical simulations.
Keywords :
block codes; numerical analysis; orthogonal codes; precoding; space-time codes; block codes; diversity order; nonunitary codebook; numerical simulations; optimized nonunitary linear precoding; orthogonal codes; space-time codes; Block codes; Design optimization; Feedback; Numerical simulation; Quantization; Receiving antennas; Signal design; Transmitters; Transmitting antennas; Wireless communication; Multi-antenna, linear precoding, orthogonal space-time block codes, non-unitary design;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2009.090480