Method for realizing rectangular interweaving

Abstract

The invention provides a device for realizing rectangular interweaving, which conducts the operation of reading first and then writing to the same address and finishes the interweaving process by controlling the reading and writing address of RAM. The structure of the device comprises an address generator and an RAM. The address generator of the device for realizing rectangular interweaving provided by the invention comprises a counter module, a Delta generating module and an address generating module, as shown in the picture. The counter module conducts counting to a clock and also conducts counting to the output times of the address. The output of the address is transported to the Delta generating module and the address generating module. The Delta value generated by the Delta generating module is transported to the address generating module. The address generating module generates a correct address in time under the control of the clock by certain operation. The device for realizing rectangular interweaving only uses the size the same as the space of a memory block, and can realize the continuous reading and writing operation in the interweaving process.

Description

technical field [0001] The invention belongs to the field of digital signal processing of digital communication. Background technique [0002] In modern digital communication systems, transmission channels are often affected by various interferences and attenuations, so errors in transmitted signals may occur. To this end, channel coding and interleaving are generally used to improve system performance. Channel coding often uses a forward error correction code (FEC, Forward Error Correction) as an outer code, and uses an interleaved code as an inner code. For random errors, it can generally be corrected by channel error correction coding, but for burst errors, interleaving technology must be added. That is, at the transmitting end, the order of the data to be transmitted is disrupted through interleaving, and then at the receiving end, the original order of the data is restored through deinterleaving. This allows clusters of burst errors to be discretized and turned into ...

AI Technical Summary

Problems solved by technology

The advantage of this kind of interleaving is that it is simple in structure and easy to implement, but the disadvantage is that it requires a large storage space, and the delay of interleaving and deinterleaving is long.

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