Chinese Terrestrial Digital Tv Standard Channel Estimation And Equalization For Simulation And Verification,

The paper is written according the scheme of channel estimation and equalization put forward in China digital television terrestrial broadcasting standard GB20600-2006《Framing Structure,Channel Coding and Modulation for Digital Terrestrial Television》. Since a good receive and BER performance in a multi-carrier transmission system needs precise channel estimation and equalization,the wireless channel character of scurciness is introduced at first with a channel estimation method of circular correlation in time domain based on PN sequence being mentioned later.The specific application of this method is fully analyzed and discussed in three kinds of multi-channel with different length and also two equalization methods in two typical channel models.Then,the channel estimation and equalization in mobile channel was studied,and a method using decision feed back based on the assumption the channel variations are linear within an OFDM block was put forward.At last,simulation and much improvement are done to realize the algorithms in project and FPGA designs of channel estimation and equalization are completed. The work I finished is as following:1.Read papers associated with the project and get familiar with system.2.Established the transmitter and channel model for the receiver simulation,including Ricean channel and Rayleigh channel.3.Wrote codes of channel estimation and equalization in OFDM system for performance test and BER analysis,includes three different estimation methods in the condition of three typical channel length,and two equalization methods with channel information.4.put farward ICI cancellation method using decision feedback in mobile channel.5.Utilized QuartusⅡand Modelsim simulation tools for FPGA design,obtained the accurate data of function simulation and time-sequential simulation with resource optimized...