Digital multichannel correlated processing system and output method for buffer module in same

Abstract

The invention discloses a digital multichannel correlated processing system which comprises at least one acquisition processing module, at least one data sending module, at least one data receiving module and at least one correlated processing module. The acquisition processing module is used for carrying out digital sampling and quadrature filtering processing on input multichannel intermediate frequency analog signals, packing the input multichannel intermediate frequency analog signals into frames and sending the frames to the data sending module; the data sending module is used for outputting the received data frames to the data receiving module according to sampling moments in time slots; the data receiving module is used for packing the received data frames according to the sampling moments and outputting data packets to the correlated processing module; and the correlated processing module is used for carrying out unpacking on the received data packets, carrying out correlated operation and packing the data packets into frames to be output. The invention also discloses an output method for a buffer module in the system. The digital multichannel correlated processing system and the output method for the buffer module, which are disclosed by the invention, have the advantages of low hardware complexity, high system expandability, strong processing structure universality, low system resource consumption and high application flexibility.

Description

technical field [0001] The invention relates to the field of digital signal processing, in particular to a digital multi-channel correlation processing system and an output method of a buffer module used in the system. Background technique [0002] Correlation operation is a commonly used operation form in the field of digital signal processing, which is used to measure the similarity between two signals and extract the information required by the application. Correlation operation functions are divided into two types: autocorrelation and cross-correlation. The autocorrelation function is used to study the information of the signal itself, such as the synchronization and periodicity of the signal waveform; the cross-correlation function is used to study the information between signals, such as two Signal arrival time difference, consistency, etc. [0003] With the development of array signal processing technology, the digital signal processing system gradually expands to mu...

AI Technical Summary

Problems solved by technology

However, in the actual integrated circuit design and engineering implementation of array signal processing technology, the correlation processing of digital multi-channel often faces many difficulties.

High-performance array signal processing systems usually require that the sampling synchronization error between channels is on the order of ten picoseconds, the bandwidth of analog signals is on the order of 100 megahertz, and the number of digital quantization bits is 8 bits or more. and processing has brought a lot of pressure, making the traditional centralized processing structure difficult to apply

[0004] After searching the existing technical literature, it is found that the Chinese patent with the patent number 200810145389.3, the patent name is: Correlation computing system and method for GNSS receivers, the patent proposes a GNSS receiver Correlation calculation system and method of the receiver, the method uses the fast Fourier transform engine to perform the correlation calculation and utilizes the back-end fast Fourier transform to improve the performance of the receiver, but its disadvantage is that the method is generally In the relevant processing system requirements of the situation, the computing speed can be improved, but it cannot be applied to the complex array signal processing system with multiple channels, high data transmission and processing flow

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