Synchronization Key Technology Research And Realization Of The Software Radio Platform

In a wireless communication system, synchronization is refers to the sending and receiving ends on the time, frequency and phase are consistent, sending and receiving ends of sync will seriously affect the performance of the system.But in actual data transmission, sending signals by the wireless channel fading, propagation delay and its thermal noise conditions, the influence of the receiver system parameter is difficult, reduce the receiver correctly restore the original data signal probability of success.Software radio system is implemented through software radio part of the hardware to realize the function, based on the general software radio platform SP2010wide operating frequency range, high accuracy, through the platform on which to set parameters configuration and function, can apply to a variety of wireless system and the work scene.SP2010baseband processing unit consists of three pieces of DSP and FPGA, the paper is mainly based on the platform structures, communication system, the development in the DSP to realize the function of the wireless communication system.Thesis mainly discusses SP2010based on software radio platform based on MPSK modulation technology of wireless communication system. Encountered in the work of the system to transmit data synchronization, synchronization algorithm is mainly studied the key technology in software radio platform, including the design and implementation of timing synchronization and phase synchronization and frequency synchronization algorithm, the synchronization technology in MATLAB and build system model and the simulation analysis. Especially for frequency synchronization, on the basis of the analysis of the existing algorithm and meanwhile, put forward a kind of adaptive frequency shift estimation algorithm based on Fitz, this algorithm can solve the problem of frequency offset estimation range and estimation precision at the same time. Finally, in the SP2010software radio platform based on DSP to build communication system and synchronization algorithm. At the same time in view of the DSP implementation of timing synchronization and frequency synchronization optimization scheme, put forward the corresponding algorithm greatly reduces the time and space complexity. In the operation of the system need to be according to the requirement of the performance of algorithm is the key variable in fixed-point processing, processing in balancing the processor speed and performance loss between the algorithm to optimize, in order to improve the performance of the whole system.