Research And Design, Digital Television Channel State Information Estimated

Digital Television Terrestrial Broadcasting (DTTB) is recently one of hot points researched by universities and enterprises around the world. But DTTB has the stumbling block of serious signal fading, which is caused by multi path pevrasion in wireless broadcasting channel; especially, it is more difficult to recovery signals in moving receive renvironment, due to the fast time varibale characteristic of the channel. DTTB basically represents the developing precursor of broad band digital communication. Its potential of product value arouses the most care among the industry. These days, China has come out with Digital Television Terrestrial Broadcasting standard. Research on terrestrial transmission technique acording to digital television standard of our countyr has far-reaching meaning, especially in the field of Channel State Information (CSI) estimation.The main work described in this project is listed as follows:(1) By making use of the frequency autocorrelation characteristics of the TPS data, the PN codes and the coefficients of the sub-channels, a new noise power estimation method in Chinese DTTB systems is presented.(2) By using interference suppression solution in receved data, a new channel estimation method is submitted in in Chinese DTTB systems.(3) Based on mix algorithms of Cooley-Tukey, PFA and Winograd, a way for 3780 points FFT design is introduced by details.(4) Matlab program Design and simulate for noise power estimation, channel information estimation, channel state information estimation and 3780 points FFT.(5) Write verilog codes and simulate for 3780 points FFT based on Xilinx ISE FPGA foundation.