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Permuter read-write method

A read-write method and interleaver technology, applied in digital transmission systems, electrical components, error prevention, etc., can solve problems such as poor interleaving flexibility, poor channel adaptability, system performance changes, etc., to avoid sudden or continuous errors wrong effect

Inactive Publication Date: 2013-06-19
WUXI ZGMICRO ELECTRONICS CO LTD
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] Traditional interleavers usually use row-to-column to read or column-to-row to read, that is, write operations row-by-row, read operations column-by-column, or write operations column-by-column, and read operations row-by-row. Simple, but the flexibility of interleaving is poor, and the interleaving depth of each group of symbol blocks is the same
Therefore, the adaptability to the channel is not good, and it is possible to transform the original periodic distribution or approximate periodic distribution errors into burst errors, thus causing changes in system performance

Method used

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Embodiment Construction

[0017] The read and write operations of the traditional interleaver usually adopt the method of writing by row and reading by column. Such as Figure 1a and Figure 1b As shown, the arrows indicate the direction of the read and write operations of the traditional interleaver. When writing data, it is in order from top to bottom, and when reading data, it is in order from left to right. Here, the memory unit opened up for the interleaver is 10×10, and the symbols at intervals of 10 from the first one in the original symbols at the time of writing are read out sequentially, and the symbols in the read symbol group becomes adjacent symbols. For example, the 1st, 11th and 21st symbols in the original symbols are read sequentially, and for the read symbols, they become adjacent symbols. After all rows in the memory unit are written and all columns are read, the interleaver completes an interleaving process.

[0018] However, in the implementation scheme of the interleaver propo...

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Abstract

The invention discloses a permuter read-write method. The method comprises the following steps: opening an internal memory space for a permuter and expressing the space with a rectangle; when writing operation is conducted, writing input code elements of the permuter into an internal memory unit in the direction of a main diagonal of the rectangle; and when reading operation is conducted, sequentially reading out the code elements of the permuter along an auxiliary diagonal of the rectangle.

Description

technical field [0001] The invention relates to the field of mobile multimedia communication, in particular to a method for reading and writing an interleaver. Background technique [0002] Interleaving is a technology used for data processing in communication systems. In essence, an interleaver is a device that can change the information structure to the greatest extent without changing the information content. Traditionally speaking, it is to maximize the dispersion of the concentrated errors that occur suddenly during channel transmission. The interleaver usually performs random permutation on the input original information sequence and reads it from front to back. The functions of the interleaver are: 1. It can generate long codes. Second, make the inputs of the two RSC encoders uncorrelated, and the encoding process tends to be independent. Interleaving makes the code generate randomness, makes the code random and uniform, plays a role in shaping the code weight, and...

Claims

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Application Information

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IPC IPC(8): H04L1/00
Inventor 黄晓
Owner WUXI ZGMICRO ELECTRONICS CO LTD
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