| 引用本文: | 侯永宏,戴居丰,王安国.数字电视多媒体广播系统的相位噪声抑制[J].哈尔滨工业大学学报,2011,43(1):134.DOI:10.11918/j.issn.0367-6234.2011.01.027 |
| HOU Yong-hong,DAI Ju-feng,WANG An-guo.Phase-noise suppress scheme for DTMB system[J].Journal of Harbin Institute of Technology,2011,43(1):134.DOI:10.11918/j.issn.0367-6234.2011.01.027 |
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| 摘要: |
| 为提高数字电视多媒体广播(DTMB)系统抗相位噪声的能力,提出了利用DTMB系统保护间隔内所填充的PN序列的时域公共相位误差校正方案,以及利用传输参数信令(TPS)的判决辅助子载波间干扰抑制方案.计算机仿真结果表明,该方法可有效地抑制接收机本振相位噪声引起的相位旋转和子载波间干扰,降低系统误符号率.而且时域公共相位误差校正方案具有抗噪声、抗干扰能力强的优点. |
| 关键词: 时域同步正交频分复用 相位噪声 公共相位误差 子载波间干扰 |
| DOI：10.11918/j.issn.0367-6234.2011.01.027 |
| 分类号:TN949.197 |
| 基金项目:国家重点基础研究计划资助课题(2007CB310605);天津市科技支撑计划重点项目资助课题(09ZCKFGX01700) |
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| Phase-noise suppress scheme for DTMB system |
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HOU Yong-hong, DAI Ju-feng, WANG An-guo
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School of Electronic & Information,Tianjin University,300072 Tianjin,China
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| Abstract: |
| To improve the phase noise immunity of Chinese Digital Terrestrial/Television Multimedia Broad-casting ( DTMB) system,a time domain CPE ( Common Phase Error) correction scheme utilizing PN sequence which was filled in the guard interval of DTMB signal frame,and a decision aided ICI ( Inter-Carrier Interference) eliminating scheme which used Transmission Parameters Signaling ( TPS) in DTMB signal frame,were proposed. Simulation results showed that the proposed schemes can eliminate the ICI and CPE,which were caused by phase noise of receiver local oscillator,and improve the symbol error rate. In addition,the time domain CPE correction scheme exhibits excellent performance in strong noise and interference environment. |
| Key words: Time-domain Synchronous Orthogonal Frequency Division Multiplexing ( TDS-OFDM) phase noise common phase error ( CPE) Inter-Carrier Interference ( ICI) |
