The Research On Key Technologies Of Demodulation In UFMC High Speed Data Transmission System

Wireless broadband high-speed data transmission technology is also one of the key technologies for building a space-based integrated information network.At present,because the universal filtering multi-carrier(UFMC)technology does not require a cyclic prefix,and with good out-of-band interference suppression,it may be used as a key technology for next-generation communications It is widely concerned.This paper studies the existing technical problems of the two key technologies that UFMC still faces: large computational complexity,synchronization technology of UFMC high-speed data transmission receiving end and non-ideal characteristic compensation,and optimizes the performance of UFMC high-speed data transmission system and reduces the implementation.Complexity is of great significance.This paper takes the “13th Five-Year Plan” civil aerospace pre-research project“Phase Array System Data Transmission Load Technology on Millimeter Wave Plates”as the background,simplifies the complexity of the UFMC high-speed data transmission system,and studies the synchronization and non-ideal characteristics compensation technology,The research results are as follows:1.Design 10 Gbps high-speed systems,analyze and compare several FFT methods,use reasonable FFT methods,and analyze and compare several existing UFMC simplified algorithms,simulate and compare the complexity of each algorithm,and select transceivers for high-speed digital UFMC systems,And propose a reasonable simplification.2.Analyze the effect of symbol timing synchronization error,carrier frequency offset synchronization error and sampling point synchronization error on the UFMC system in the UFMC system,combined with the traditional OFDM classic algorithm for analysis,and combined with the ZC sequence to design a suitable for UFMC system Frequency domain training sequence.An algorithm for estimating carrier frequency offset and symbol timing using a single sequence is designed,and simulation proves that it has good accuracy and a large estimation range.And the algorithm has the advantages of low complexity and fast convergence speed,without iteration,suitable for UFMC high-speed data transmission system.3.Analyze the non-ideal characteristics of the UFMC system-the impact of IQ imbalance and phase noise,analyze and classify the traditional OFDM compensation algorithm,and propose a method that can use a single training sequence to work on a complex channel or In the Gaussian white noise channel,the IQ imbalance estimation and compensation algorithm is performed,and the simulation proves that it has good estimation accuracy and performance.The phase noise compensation algorithm is studied,the performance of each algorithm is compared,and the advantages and disadvantages are analyzed.Finally,the frequency domain coefficient estimation algorithm combined with continuous pilot is selected as the high-speed digital transmission UFMC phase noise estimation algorithm.It is suitable for UFMC high-speed data transmission system.This paper mainly studies the complexity,synchronization problems and non-ideal characteristics in the UFMC high-speed data transmission system,proposes several algorithms and compensation algorithms for the UFMC high-speed data transmission system,and simplifies the overall complexity.The complexity of the transmission system,the synchronization,and the compensation of non-ideal characteristics provide important references,which are of great reference significance for engineering implementation.