CAJ | 학술논문

随着数字移动电视技术的发展,公交电视几乎已经覆盖了整个北京的公交系统。但是在公交电视节目的传送过程中受到多径衰落、多普勒频移等的影响,经常会出现接收信号差或无信号的现象。为了解决衰落,改善数字电视广播移动接收的信号质量,这里引入了基于空时分组码的MIMO技术,来提高公交电视的接收效果。仿真结果说明了MIMO技术可以有效克服多径衰落,提高信号的误码率。
수착수자이동전시기술적발전,공교전시궤호이경복개료정개북경적공교계통。단시재공교전시절목적전송과정중수도다경쇠락、다보륵빈이등적영향,경상회출현접수신호차혹무신호적현상。위료해결쇠락,개선수자전시엄파이동접수적신호질량,저리인입료기우공시분조마적MIMO기술,래제고공교전시적접수효과。방진결과설명료MIMO기술가이유효극복다경쇠락,제고신호적오마솔。
With the development of wireless digital television technology,television programs can be enjoyed on almost every bus in Beijing whenever and wherever.However,the receive signals often in poor quality due to the influences of doppler shifts and carrier frequency offsets.Multiple-transmit antenna and multiple-receive system based on the technology of MIMO is proposed here to improve the quality of TV programs.Besides,Space-time block code is also employed.Simulation results indicate that it has better error performance.