Research On FBMC Modulation Technology Based On Kalman Filter

(1)With the widespread use of 5G new air interface signal processing technology and ultra-large-scale MIMO dense networking user technology,the channel transmission capacity and signal modulation technology schemes in current communication systems are not easy to match the ultra-high-density networking application scenarios.In the context of large-scale multiple-input multiple-output(MIMO)communication systems,this paper studies the FBMC modulation scheme of filter bank multi-carrier technology based on Kalman filtering algorithm.Because the FBMC modulation technology scheme has the ability to resist multipath distortion in super-large-scale multiple input multiple output(MIMO)dense networking and multipath random channel transmission.It can well solve the problems of scarcity of system spectrum resources and reduce communication transmission delay,and enhance the reliability and effectiveness of communication systems and communication links.It has more application prospects than the traditional OFDM scheme.(2)First,I explored the traditional multi-carrier modulation technology OFDM in the communication system,and analyzed the principle and architecture of its baseband processing module.It is concluded that although the transmission rate and channel anti-fading performance of OFDM,and the transmission system's anti-inter-symbol interference ability are still good,its biggest disadvantage is the use of carrier cyclic prefix,which has a great impact on the spectrum efficiency of the communication system,so that It is incapable of matching the application scenarios of ultra-high-density multi-input multi-output networking.Future air interface signal processing technical solutions will focus on high-speed,high-density,multi-connection,high-reliability,multi-dimensional(Multi-Dimension,MD),multi-input multi-output MIMO user transmission and other holographic interactive VR application scenarios and communication The matching problem of system capacity and signal modulation processing.(3)Secondly,verify and analyze the structural principles of the classic FBMC modulation technology scheme,and optimize and analyze the feasibility of the FBMC modulation scheme through the design of the prototype filter bank,and compare its design scheme with OFDM modulation.FBMC maintains the main advantages of OFDM/OFDMA,such as the use of sub-carrier orthogonality to eliminate inter-area crosstalk,and effectively improve spectrum efficiency.At the same time,under the background of mature large-scale integrated circuit technology,the fast Fourier transform(FFT)and inverse fast Fourier transform(IFFT)block processing in the digital baseband processing is easy to implement,and the adaptive coupling and The large-scale antenna array hardware module is easy to integrate.It has more attractive information processing capabilities than OFDM,but it also has some obvious shortcomings,such as the increased complexity of its baseband fast processing,and the relay channel transmission performance is affected by the relay selection scheme.(4)Finally,the Kalman filter algorithm and filtering structure are introduced on the basis of the FBMC modulation technology scheme,which aims to reduce the complexity of the baseband module in the transmission channel and the problem of matching the transmission performance of the relay channel.The Kalman filter algorithm has excellent processing effects on random signals and known signals,Gaussian and non-Gaussian,stationary and non-stationary,low-dimensional and multi-dimensional,and has the ability to quickly track and process the channel state in a timely manner.Based on this,I explored the FBMC carrier modulation technology scheme based on Kalman filtering.The system complexity and performance feasibility study of its corresponding filter implementation scheme is carried out,and the random relay transmission model is simulated and verified by MATLAB2018 a platform.The performance simulation analysis of the complexity and spectrum efficiency of the optimal relay transmission scheme in the communication system is carried out,and finally a more ideal relay selection scheme and performance parameters are obtained by exploring.