中文

Journal of Shanghai University（Natural Science Edition） ›› 2010, Vol. 16 ›› Issue (4): 331-335.

• Communication and Information •     Next Articles

Optimization of Very Minimum Chirp Keying Modulation Waveforms Based on Sinusoidal Basis Fitting

JIA Dong-li1,2,ZHENG Guo-xin1,ZHANG Li1,ZHU Ya-zhou1   

  1. (1. Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200072, China;
    2. School of Information and Electronic Engineering, Hebei University of Engineering, Handan 056002, Hebei, China)
  • Received:2009-07-03 Online:2010-08-30 Published:2010-08-30

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Abstract:

Very minimum chirp keying (VMCK) is a novel ultra narrow band modulation method with the advantages of narrow band occupancy, intensive sideband suppression, and high transmission efficiency. However, since an analytical solution of the VMCK spectrum cannot be obtained directly, further optimization is limited. This paper presents a VMCK modulation optimization scheme based on sinusoidal basis fitting. The theoretical analysis and simulation show that the proposed scheme can successfully remove harmonic spectral lines and obtain an optimized VMCK waveform with narrower bandwidth and lower sidebands, and good demodulation performance. 

Key words: very minimum chirp keying (VMCK); sinusoidal basis fitting; waveform optimization

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