Sine Non-linear Chirp Keying And Methods Of Parameters Estimation

Due to the weaker Doppler frequency shift and multipath resolution capability ofsingle-frequency wave modulation techniques, its band-pass development was limited inwireless communication technology. So in the high-speed wireless mobile communicationfield, a kind of technology was needed having a strong inhibit ability for Doppler frequencyshift, the capability can adapt various kinds of communication situation and its signalprocessing are a challenge in the field of nowadays communication development. Routingalong the path of single-frequency wave modulation technology, this paper proposed a newnonlinear modulation－the Sinusoidal Nonlinear Chirp Keying(SNCK). SNCK modulationtechnique which carrier is Sinusoidal model, having a high capability of Doppler frequencyshift suppression, flexible configuration parameters and easy analysis for cooperationrecipient receivers, difficult analysis for noncooperation recipient receives. A better signalanalysis method can be prepared for demodulation at the receiver, and this improves theusefulness and value of this signal. So this paper used two signal analysis ways for thecharacteristic about non-stationary of SNCK modulated signal to estimate its parameters, andanalysis every applicable occasion.SNCK modulation techniques was proposed in This paper, introduced technology SNCKmodulation principle, including the theoretical formula derivation, waveform simulation,SNCK modulated signal’s characteristics, including the degree of energy concentration,waveform samples relationship and theoretical bit error rate under Gaussian white noisechannel, as well as SNCK signal channel adaptability, including white Gaussian noise channel,Doppler frequency shift channel, multipath channel, adjacent channel interference; Secondestimated the parameters based on the spectral characteristics of the cycle the stationary, andthe estimation performance analysis through software simulation under the white Gaussiannoise channel; Then using discrete sine the FM transform to estimate the parameters underwhite Gaussian noise channel, and estimation performance analysis through softwaresimulation; At last summarized the advantages and disadvantages of the two parameterestimation methods applicable occasions.