Multi-mode high-sensitivity high-speed signal receiving circuit

Abstract

According to the multimode high-sensitivity high-speed signal receiving circuit disclosed by the invention, the communication reliability and the transmission efficiency can be improved. According to the technical scheme, a fixed-point sampling module converts an input analog signal into a digital signal and sends the digital signal to a time delay calculation module, the time delay between two paths of signals is calculated and corrected, and a decimation filtering module recovers a baseband digital signal and sends the baseband digital signal to a self-adaptive equalization module 1 for dynamic correction; sending a cancellation result to a mode identification module, sending an identification result to a carrier tracking module, selecting a corresponding carrier tracking algorithm to carry out carrier tracking, sending the carrier tracking algorithm to a symbol tracking module to carry out symbol tracking, sending a symbol tracking result to an adaptive equalization module 2, and carrying out channel equalization by adopting a blind equalization algorithm; processing results are respectively sent to a variable code modulation processing channel and a fixed mode code modulation processing channel, and lossless receiving of self-adaptive code modulation signals is realized by adopting automatic mode recognition, unified carrier tracking, symbol tracking and decoding processing.

Description

Technical field [0001] The present invention belongs to the field of unlimited communications, mainly relates to a multi-mode high-sensitivity high-speed signal receiving circuit particularly suitable for satellite communications, satellite remote sensing and other wireless communication occasions. Background [0002]Satellite remote sensing is an important technical means for collecting earth data information, with many characteristics such as borderless restrictions, wide coverage area, periodic observation, and objective data. The remote sensing image data with the characteristics of high spatial resolution, high temporal resolution, high spectral resolution and high radiation resolution obtained by it can provide information and services for the application of the national economic industry through basic processing and information extraction by the remote sensing image processing platform. With the development of satellite remote sensing technology, the resolution of remote s...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems existing in the existing high-speed signal receiving process that cannot adapt to the new system adaptive coded modulation signal lossless reception, the receiving effect is sensitive to the polarization interference existing in the transmission link, and the rece

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