CAJ | 학술논문

正交频分复用（OFDM）对同步偏差十分敏感,同步偏差的产生会使OFDM系统性能大大降低。通过对训练符号在时域乘以特殊伪随机序列来消除定时同步中的峰值平台问题,仿真结果表明,与传统算法相比,改进算法在同步位置具有很尖锐的峰值,同步性能更好,符号定时更精确。
정교빈분복용（OFDM）대동보편차십분민감,동보편차적산생회사OFDM계통성능대대강저。통과대훈련부호재시역승이특수위수궤서렬래소제정시동보중적봉치평태문제,방진결과표명,여전통산법상비,개진산법재동보위치구유흔첨예적봉치,동보성능경호,부호정시경정학。
Orthogonal Frequency Division Multiplexing（OFDM） is particularly sensitive to the synchronization errors that can greatly decrease the OFDM system performance.The plateau in timing synchronization is eliminated by multiplying the special pseudo random sequence in time domain.The simulation results show that the proposed scheme is more efficient in comparison with the conventional algorithm,the improved algorithm has a very sharp peak in synchronization position and a better performance in synchronization,and it is more accurate in symbol timing.