摘要
为了精确消除相位误差影响,获得良好系统性能,提出了一种新的OFDM(OrthogonalFrequencyDivi sionMultiplexing)公共相位误差消除方法,该方法给出了在频率同步和信道均衡两级联合完成公共相位误差校正的结构,利用全导频,提出新的公共相位误差估计算法。理论分析和计算机仿真表明,两级联合校正结构非常适合OFDM系统中的公共相位误差校正,全导频公共相位误差估计算法可以获得优于传统方法的估计性能,特别在恶劣信道条件下,提出的全导频估计算法非常适用。
For cancelling the effect of phase error accurately and obtaining good performance,a new CPE (Common Phase Error) cancellation scheme is proposed for OFDM(Orthogonal Frequency Division Multiplexing) system, which corrects the CPE with two steps in frequency synchronization and channel equalizer, and estimates the CPE using all pilots in an OFDM symbol including CP (Continual Pilots) and SP (Scattered Pilots). The analysis and the simulations show that the proposed CPE correction structure with two steps adapts to the CPE correction in OFDM system, and the new CPE estimation algorithm using all pilots can obtain more accurate results than the conventional method, especially, under the severe channel conditions.
出处
《吉林大学学报（信息科学版）》
CAS
2005年第3期232-236,共5页
Journal of Jilin University（Information Science Edition）
基金
国家自然科学基金重大研究资助项目(60496316)
关键词
正交频分复用
数字电视地面广播
公共相位误差
导频
orthogonal frequency division multiplexing
digital terrestrial video broadcasting(DVB-T)
common phase error
pilots
