Title :
ANovel Method for Binary Chirp-Rate Modulation and Demodulation
Author :
Deng, Bing ; Tao, Ran ; Chen, Enqing
Author_Institution :
Dept. of Electron. Eng., Beijing Inst. of Technol.
Abstract :
Chirp-rate modulation (CRM) is a kind of technique of spread spectrum which has the ability of anti-multipath and anti-interception. Meanwhile as a modulation method, CRM can be combined with other spread spectrum methods to compose a hybrid-spread-spectrum scheme and increase the system capability. In this paper, the method for binary CRM based on the fractional Fourier transform is investigated, and a convenient noncoherent demodulation method is presented. The peak of the output of the demodulator is derived. And the effect of Doppler shift is analyzed, which shows the inherent immunity against Doppler shift. Finally, simulation results show that the performance of this proposed method is worse than optimal matched demodulation by about 3 dB, but without needing of rigorous phase synchronization
Keywords :
Doppler shift; Fourier transforms; demodulation; modulation; spread spectrum communication; Doppler shift; anti-interception; anti-multipath; binary chirp-rate modulation; demodulation; fractional Fourier transform; spread spectrum methods; Bit error rate; Chirp modulation; Demodulation; Digital modulation; Fourier transforms; Frequency shift keying; Modulation coding; Phase shift keying; Signal processing; Spread spectrum communication;
Conference_Titel :
Signal Processing, 2006 8th International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-9736-3
Electronic_ISBN :
0-7803-9736-3
DOI :
10.1109/ICOSP.2006.345831
