A Novel Modulation And Demodulation Method Based On Reverse Boundary Component Analysis

Digital modulation and demodulation technology study and its performance improvement are important,which is one of the key technologies of digital communication system.A new modulation and demodulation method will create greater application value.Matrix multiplication of linear instantaneous mixed blind source separation(BSS)mathematical model is suitable for modeling signal modulation.And blind source separation algorithms can be seen as demodulation methods.Therefore,in this paper,a novel modulation and demodulation method based on reverse bounded component analysis(RBCA)is proposed by using BSS mathematical model and a BSS algorithm.And then,using this novel method to doing applications study in communication field,communication jamming field and communication jamming intergration field.Firstly,this paper introduces the bounded component analysis perimeter matching(BCAPM)algorithm,including the mathematical model of linear instantaneous mixed blind source separation,and ambiguities.Then using simulates of separating two mixed signals to campare the BCAPM algorithm and the transcendental complex non-gaussianity maximization(TCMN)algorithm.The BCAPM algorithm shows better performance than the TCMN algorithm when source signals are the gaussian distribution,or have character of correlation or have few sample points.These studies provide theoretical supports for the research of this subject.Secondly,this article proposes the theory of RBCA modulation and demodulation.Using the BSS mathematical model for designing RBCA modulation method.Using BCAPM algorithm with the designed RBCA demapping method as RBCA demodulation method to extract information.The provements of theory ensure the correctness and feasibility of the method.Then,parameters' simulations help to select reasonable parameters.After that,the power spectral density of RBCA modulated signal is analyzed.The conclusion is drawn that RBCA modulated signal power spectral density is similar to that of the modulated signal which ensures the rationality of the application of the method.Finally,this article applies RBCA modulation and demodulation method in three aspects.first,giving an application of the communication scheme based on RBCA modulation and demodulation.The simulations show that RBCA modulation under different modulated signals has different anti-noise performance when symbol rate,center frequency and sampling rate are fixed.The communication signal based on RBCA modulation has 4dB advantage than 4QAM signal when the modulated signal selects 4QAM mapping or 16 QAM mapping.This conclusion verifies the communication feasibility and advatages of this method.Second,giving a jamming scheme based on RBCA modulation.In the simulation experiments of jamming in 4QAM and 16 QAM signals,results show that the jamming signals based on RBCA modulation have more effect JSR range than the spread spectrum jamming signals and single-tone jamming signals which determines the application value in the field of jamming.Third,proposing a communication jamming integration system based on RBCA modulation and demodulation.Comparing with the integration system based on direct sequence spread spectrum.Simulations shows the proposed integration signal has more effect communication and jamming SJR range at the same time.This scheme has two meanings that innovation and practicality.