Quasi-orthogonal Space Time Coding
LI Xuan
SHAO Chao
Abstract：With the development of the wireless communications industry ,the available spectrum resources are in in‐creasingly tension .How to improve the system spectral efficiency has become the focus issue of the wireless communication’s development .Space‐Time coding ,which is a signal processing technique that combines channel coding with antenna diversi‐ty ,can close to the theory capacity of MIMO systems limitly and achieve the high‐speed data rate with no need of additional bandwidth and effectively resist the fading in mobile communications .In the paper ,firstly the encoding and decoding algo‐rithms of orthogonal space‐time coding are studied .However ,as for complex signal constellation ,the rate of 1 orthogonal design only exists in two transmit antennas .In order to apply the rate of 1 orthogonal design to any antennas ,this paper fo‐cus on full‐rate quasi‐orthogonal space‐time block coding and full‐rate full diversity quasi‐orthogonal space‐time block coding based on the constellation rotation ,and also give the optimal rotation angle with different modulation .Finally its performance is verified by simulation .
Keywords：space-time block codingquasi-orthogonal space-time block codingfull-ratefull diversity
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 1780-1785 )