An Improved Synchronization Scheme for Non-Integer Multiple Spread Spectrum

6th Annual 2018 International Conference on Geo-Spatial Knowledge and Intelligence

Miao, Gumin^1 ; Feng, Man^1 ; Xu, Liang^1

Southeast University, Nanjing, China^1

关键词: Carrier frequency estimation;    FFT algorithm;    Hardware resources;    Pseudo codes;    Spread spectra;    Spread spectrum systems;    Synchronization scheme;    Zero padding;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/234/1/012110/pdf
DOI  :  10.1088/1755-1315/234/1/012110

来源: IOP

【 摘 要 】

Non-integer multiple spread spectrum systems are gradually being widely used in civil and military communications due to their superior communication security and signal privacy. For the difficulties in the capture of pseudo-codes in the non-integer multiple DSSS-DQPSK system under the large Doppler shift, a fourth power PMF-FFT (4th-Power-PMF-FFT) scheme is proposed. The system is optimized by zero-padding and batch FFT algorithms to eliminate scallop loss, improve carrier frequency estimation accuracy, and reduce hardware resource consumption The simulation results proved the effectiveness of the method.