원문정보
초록
영어
The periodic estimation method of the PN sequence in DS Signal is researched. It is hard for traditional methods to estimate PN period of DS/SS accurately in the condition of low Signal-to-noise ratio. On the basis of the traditional spectrum reprocessing and the cepstrum method, a PN period estimation method which has integrated serial average with spectrum reprocessing and the cepstrum are put forward to solve this problem and meet the requirements of lower Signal-to-noise ratio. The simulation results show that, when the period of PN sequence is estimated accurately, the cepstrum method has better estimating performance than the spectrum reprocessing method, and the spectral estimation method has lower Signal-to-noise ratio tolerance after improvements.
목차
1. Introduction
2. Theory About Spectral Estimation of DSSS Signal Pseudo Code Period
2.1. Traditional Secondary Spectrum Theory
2.2. Traditional Cepstrum Theory
2.3. Improved Spectral Estimation Theory
3. Simulation and Estimation Performance Analysis
3.1. Quadratic Spectrum Estimation Results
3.2. Cepstrum Estimation Results
3.3. Estimation Performance Analysis
4. Conclusion
References