Fusion implementation architecture for national standard digital television ground broadcast demodulator

Abstract

The invention discloses a demodulator fusion realization architecture of a nationwide standard digital television terrestrial broadcast receiver, which comprises a analog-to-digital conversion module, a midfrequency processing module, a PN data separation module, a blind mode detection module, a channel estimate module, an interference cancellation module, a first general time-frequency transformation processing module, a second general time-frequency transformation processing module and a frequency-domain equalizing module; signals after frequency-domain equalizing are controlled by a first select switch to be input to a multicarrier transformation processing module so as to form frequency-domain multicarrier signals meeting the multicarrier standards, and then enter a QAM demodulation and channel decoding module by a second select switch; or the signals after frequency-domain equalizing are controlled by the first select switch to be input to a third general time-frequency transformation processing module so as to form time-domain single carrier signals meeting the single carrier standards, and then enter the QAM demodulation and channel decoding module by the second select switch to form MPEG TS code stream finally. The demodulator fusion realization architecture not only can realize the fusion of the single carrier and the multicarrier, but also has high resource reusability and low realization complexity.

Description

technical field [0001] The invention relates to the field of wireless signal transmission, in particular to a national standard digital TV terrestrial broadcast demodulator fusion realization system. Background technique [0002] The national standard for terrestrial digital TV (GB20600-2006) is the first national standard in the field of digital TV transmission in my country. [0003] This standard stipulates the frame structure, channel coding and modulation technical requirements of digital TV terrestrial broadcast transmission system signals in UHF (Ultra High Frequency) and VHF (Very High Frequency) frequency bands, within each 8MHz digital TV band. Support standard resolution and high resolution digital TV signal transmission, support fixed reception and mobile reception. [0004] This standard combines the multi-carrier solution of Tsinghua University and the single-carrier solution of Shanghai Jiaotong University. Because there is a big difference in principle betw...

AI Technical Summary

Problems solved by technology

Due to the large difference in principle between single carrier and multi-carrier, in terms of implementation, if a mixed solution is adopted, the complexity will be very high

The current all-in-one machine adopts the combination of two chips: multi-carrier and single-carrier use one chip each, and its shortcomings are very obvious, such as not easy for system integration; switching between single-carrier and multi-carrier is very inconvenient, The time is also long; it is very unfavorable for the development of industrialization

Images