Coding orthogonal frequency division multiplexing wireless signal receiving and processing device and processing method thereof

Abstract

The invention discloses a coding orthogonal frequency division multiplexing wireless signal receiving and processing device and a processing method thereof. The device comprises a receiving synchronizer, a channel equalizer and a decoder. The receiving synchronizer comprises a frame detection module, a time domain decimal frequency offset rectifying module, a sign timing rectifying module, a frequency rectifying module, a Fourier transform module, an integer frequency offset estimation module, a pilot frequency extraction module, a frequency domain decimal frequency offset estimation module, a sign timing offset estimation module, an inherent spurious frequency offset tracking module and a sampling frequency offset rectifying module. The receiving synchronizer comprehensively takes the effects of carrier synchronization offset, carrier phase offset, sampling interval offset, sampling timing offset and orthogonal frequency division multiplexing (OFDM) sign timing offset on OFDM signal demodulation into consideration to design a receiving synchronization algorithm from the three aspects of carrier synchronization, sign timing synchronization and sampling synchronization. The coding orthogonal frequency division multiplexing wireless signal receiving and processing device further has the advantages of being high in video definition, small in transmission delay, strong in interference resistance, high in reliability and the like. The invention further discloses the processing method of the device.

Description

technical field [0001] The invention relates to data processing technology, in particular to a coded orthogonal frequency division multiplexing wireless signal receiving and processing device and a processing method thereof. Background technique [0002] In recent years, with the rise of wireless communication networks such as GPRS, CDMA, 3G (TD-SCDMA, WCDMA, CDMA2000), OFDM, etc., wireless video transmission systems have been widely used in the military due to their flexibility, intuitive image, and convenient operation. Individual combat, public security remote monitoring and evidence collection, TV program broadcasting, mine oil field safety monitoring, underground garage supermarket environmental monitoring, community environmental monitoring and other fields have become an important means for people to achieve long-distance and large-scale on-site monitoring. COFDM technology is characterized by its high transmission rate and strong anti-interference ability, which make...

AI Technical Summary

Problems solved by technology

[0003] At present, there are many companies at home and abroad carrying out the research and sales of products in the field of wireless video surveillance. Judging from the mainstream OFDM-based video transmission products abroad, the transmission image resolution is D1 (720×480p), and some products are embargoed to China. ; while most domestic products have core technology (baseband coding, modulation, decoding boards) dependence on imports, high prices, and single product applications, while the introduction of foreign advanced video surveillance systems has problems such as high prices, key technologies controlled by others, and poor scalability.

Images