A method and device for realizing cirrocumulus interweaving/de-interweaving based on external memory

Abstract

The invention relates to a method and a device for utilizing an external memory to realize convolutional interleaving and deinterleaving. The method of the invention comprises the following steps that: interleaving and deinterleaving data is cached in an on chip buffer; when the on chip buffer is written or read, the on chip buffer is communicated with a storage controller; the interleaving / deinterleaving data is written in an external memory through the storage controller or is read out from the external memory. The method and the device utilize the on chip buffer to cache the interleaving / deinterleaving data, thereby the read-write efficiency on the external memory is greatly improved and the demand on read-write clock frequency of the external memory is reduced; the external memory is operated by a special external interface through the storage controller, thereby complex read-write time sequence can be screened and multiplexing of the external memory with other functional modules is also convenient.

Description

technical field [0001] The invention relates to the field of digital communication, in particular to a method and device for realizing convolution interleaving / deinterleaving by using an external memory. Background technique [0002] In a digital communication system, the transmission process usually suffers from burst noise interference and produces a large number of continuous bit errors, which leads to exceeding the error correction capability of the decoder. In order to discretize the burst errors and improve the error correction capability of the system, it is necessary to add an interleaver and a deinterleaver in the transmitter and receiver respectively. [0003] All kinds of digital TV broadcasting transmission systems contain time-domain interleaving part, mainly adopting the method of convolution interleaving. When the interleaving width and depth are large, the size of the required storage unit is correspondingly increased. For example, in the national standard ...

AI Technical Summary

Problems solved by technology

This method only reads and writes one data at a time, the read and write efficiency is very low, it is difficult to multiplex the external memory with other functional modules, and when the read and write clock frequency is not high, the read and write operations cannot even be completed before the arrival of the next interleaved data

[0007] To sum up, the current technical solutions related to interleaving mainly use RAM to realize the address generation method when interleaving, but do not elaborate on the relevant optimization measures that should be taken after using external memory

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