The FPGA Implementation Of Time And Frequency Synchronization Based On NGB-W System

Synchronization is a technology to coordinate various signals working incommunication network and the signals’ working is the foundation for informationtransmission in the communication network. Synchronization technology is a key anddifficult technology in OFDM. But due to the randomness of the wireless channel, thetraditional method on the threshold setting cannot consider performance of bothaccuracy and computational complexity. On this basis, analyse the synchronizationtechnology in time domain and frequency domain, and introduce the key algorithms andhardware implementation scheme and code simulation in detail in time domain andfrequency domain.As Internet commercialized by a live video, audio, and the development of digitalcommunication, people have the higher expectations for wireless communication. Thenext generation wireless communication system is facing more and more severechallenges.To solve the large capacity of communication requirements of a largenumber of users and the contradiction between the limited spectrum resources supply,Orthogonal Frequency division multiplexing (Orthogonal FrequencyDivisionMultiplexing, OFDM) technology as the representative of the technology hasgot the attention and research of the academia and industry, and widely accepted as thefirst choice for the next generation wireless communication system architecture.NGB-W means the Next Generation wireless networks. NGB-W is on the basis ofthe results of cable network digital integral transformation and mobile multimediabroadcasting (CMMB).With independent innovation of "high performance broadbandinformation network" the core technology to support, to build suitable for China’snational conditions,"triple play" of the combination of wireless, cable, the whole entirenetwork of the next generation of radio and television networks. NGB-W isnext-generation wireless radio and television networks that based on the technicalstandards of the independent intellectual property rights as its core, can transmiss bot hdigital and analog signals at the same time and has two-way interaction, multicast, pushon deposit and radio in four work modes, is controllable credible to care, to the entire network broadband interactive.This paper is by NGB-W time and frequencysynchronization in wireless communication system hardware FPGA implementationissues as the main research object and describes the algorithm and hardwareimplementation scheme, and the hardware implementation of the simulation in detail.