Analysis of bandwidth efficiency and modulation parameter for chirp-rate modulation

A code transmission method of chirp-rate modulation is proposed based on partial overlap of the pulse-width. Accordingly the improving coefficient of bandwidth efficiency is derived, and the analytic expression of improving maximum is obtained using the demodulation method in the fractional Fourier...

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Bibliographic Details
Published inProceedings of 2013 2nd International Conference on Measurement, Information and Control Vol. 1; pp. 394 - 398
Main Authors Bing Deng, Shiqi Cui, Xiaochen Li
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.08.2013
Subjects
bandwidth efficiency
Chirp
chirp-rate modulation
Customer relationship management
Demodulation
Floors
modulation parameter
Multiaccess communication
Radio access networks
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Summary:A code transmission method of chirp-rate modulation is proposed based on partial overlap of the pulse-width. Accordingly the improving coefficient of bandwidth efficiency is derived, and the analytic expression of improving maximum is obtained using the demodulation method in the fractional Fourier domain. Next, the chirp-rate modulation parameter is analyzed from the orthogonality of modulated signals and the error about discrete sampling position. It is found that not only the cross-correlation function but also the error of sampling position run to zero as the time-bandwidth product of modulated signal increases. Even if the time-bandwidth product is not large enough, the appropriate modulation parameter can be accepted for maintaining the orthogonality or reducing this error. Finally, the simulations are made to prove the above-mentioned theories.
DOI:10.1109/MIC.2013.6757990