Research On Theory And Performance Analysis Of1/3Continues Phase Chirp Keying

The digital bandpass modulation technology with high bandwidth efficiency has becomea hot issue in the field of wireless communication in order to solve the conflict betweenincreasingly growing demand for communication capacity and increasing scarcity of thespectrum resource.In this paper, after drawing on the thinking of Ural Narrow Band (UNB) modulationtechnologies,1/3Continuous Phase Chirp Keying (1/3-CPCK) is proposed as a new digitalbandpass modulation technology which based on the Linear Frequency Modulation (LFM)signal and directing at the technical defects of VMCK, and the performance of1/3-CPCKmodulation is analysed and proved emphatically.The main contents of this paper are as follows.First, the mathematical expression of1/3-CPCK modulated signals is built and thesystem scheme based on1/3-CPCK modulation in wireless communication is designed.Second, the technical performance of1/3-CPCK modulated signals (energy distributionof modulated signals in the frequency domain, correlation of waveform samples of modulatedsignals, etc.) is analysed in theory and simulated by computer.Then, the performance in noise suppression of wireless communication system based on1/3-CPCK modulation is analysed and proved, the expression of bit error rate (BER) isderived under the condition of full-band, and the above results are all analysed and simulated.Finally, the BER and the bandwidth efficiency of wireless communication system basedon1/3-CPCK modulation under the definition of relative bandwidth (full-band signal) andabsolute bandwidth (band-limited signal) are analysed emphatically, and the adaptability of1/3-CPCK modulation under fading channel is analysed and simulated.