CAJ | 학술논문

随着无线通信业务的发展，可用的频谱资源越来越紧张，如何有效地提高系统的频谱利用率成为通信发展的焦点。空时编码是一种结合信道编码和分集的新型的编码和信号处理技术，它能够在不牺牲带宽的情况下有限接近 MI‐MO 系统的理论容量和实现全速率，有效地抵抗了衰落问题。论文首先研究了正交空时分组码的编译码算法，其次针对复信号的星座图，速率为1的正交设计仅存在于两根发射天线中，为能在多发天线中实现高速率传输，重点研究了全速率准正交空时分组码和基于全速率满分集的星座图旋转的准正交空时分组码，并给出了不同调制方式下的最优旋转角，最后通过仿真比较了其性能。
수착무선통신업무적발전，가용적빈보자원월래월긴장，여하유효지제고계통적빈보이용솔성위통신발전적초점。공시편마시일충결합신도편마화분집적신형적편마화신호처리기술，타능구재불희생대관적정황하유한접근 MI‐MO 계통적이론용량화실현전속솔，유효지저항료쇠락문제。논문수선연구료정교공시분조마적편역마산법，기차침대복신호적성좌도，속솔위1적정교설계부존재우량근발사천선중，위능재다발천선중실현고속솔전수，중점연구료전속솔준정교공시분조마화기우전속솔만분집적성좌도선전적준정교공시분조마，병급출료불동조제방식하적최우선전각，최후통과방진비교료기성능。
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 .