用于罗兰C接收机天波识别的IFFT频谱相除技术探讨

罗兰C无线电导航接收机所接收的是带有天波干扰的地波信号。为了有效的将天波分离，给出了一种简单但是有效的IFFT的频谱相除技术，应用于罗兰c接收机中采样点的适应性调节，并给出了一种会影响到整体性能的全面、综合的参数分析。仿真结果表明，运算能够在极高噪声环境下成功运行。

IFFT Spectral-Division Technique for Skywave Identification Receivers

Receivers for the Loran-C terrestrial radio-navigation system are designed to distinguish pulses received by groundwave propagation from skywave interference components that arrive later. Skywave interference affects the performance of receivers greatly because of finite bandwidth of filter in receivers. The skywave rejection methods employed in current design of receivers are not optimal because they use fixed, worst-case, sample timing. This paper presents a simple but efficient technique for adaptive adjustment of the sampling point in LORAN-C receivers, and provides a full comprehensive analysis of the parameters that might affect its performance. Simulation results show that the algorithm is successful under the high noise environment.