CAJ | 학술논문

提出了一种信号检测与频偏估计算法，通过对同步头做 FFT变换来进行信号检测与频偏估计。与常规的算法相比，该算法不仅可以同时进行信号检测和频偏估计，而且可在较低信噪比、较大载波频偏和较大的信号动态范围内工作，适合于突发通信。在已有理论的基础上对算法进行了分析与仿真，仿真结果表明，32个符号同步头就可以有效地实现突发信号的检测和频偏估计。
제출료일충신호검측여빈편고계산법，통과대동보두주 FFT변환래진행신호검측여빈편고계。여상규적산법상비，해산법불부가이동시진행신호검측화빈편고계，이차가재교저신조비、교대재파빈편화교대적신호동태범위내공작，괄합우돌발통신。재이유이론적기출상대산법진행료분석여방진，방진결과표명，32개부호동보두취가이유효지실현돌발신호적검측화빈편고계。
This paper presents a signal detection and frequency offset estimation algorithm by performing FFT transform to synchronization symbols in a preamble. Compared with common algorithms,it can perform signal detection and frequency offset estimation simultaneously,also it can operate under the condition of lower signal-to-noise,larger carrier frequency deviation and larger signal dynamic range.The method is readily implemented in burst-mode transmission. The paper analyzes and simulates the algorithm based on the known theory and simulation results show that thirty-two synchronization symbols in a preamble can achieve effectively signal detection and frequency offset estimation.