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Design plan for two-dimension interlacing device based on pseudo-random sequence

A pseudo-random sequence and wireless communication technology, which is applied in the field of interleaver and deinterleaver, can solve the problems of time delay exceeding the tolerance range of the system, unconstrained interleaving address interleaving distance, and restricting coding performance, etc.

Inactive Publication Date: 2012-06-27
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

These two types of interleaving mapping rules are relatively simple, but when the interleaving depth increases, the time delay caused by this type of interleaving scheme may exceed the tolerance of the system
The so-called PN pseudo-random interleaver refers to the interleaving design method based on PN sequences. This method uses linear shift registers to directly generate interleaving addresses. This method can greatly simplify hardware circuit design, but this method does not constrain the interleaving of interleaving addresses. Distance, it is possible that two adjacent bits before interleaving are still adjacent after interleaving, thus restricting the coding performance of Turbo to a certain extent

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  • Design plan for two-dimension interlacing device based on pseudo-random sequence
  • Design plan for two-dimension interlacing device based on pseudo-random sequence
  • Design plan for two-dimension interlacing device based on pseudo-random sequence

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Embodiment Construction

[0015] The present invention is a device and method for interleaving coding. The present invention may be used in satellite communication systems, wireless telephone systems, and the like.

[0016] figure 1 A standard Turbo encoder is shown. Component encoder 108 and interleaver 107 receive data information sequence 101 . Component encoder 108 generates parity symbols 104 . The component encoder 109 receives the input data 102 generated by the interleaver 107 and generates parity symbols 103 . Puncturing matrix 110 receives parity symbols 103 and 104 . According to a specific code rate requirement, the check symbol 105 is output after the puncturing matrix 110 is punctured. The multiplexer 111 receives the data information sequence 101 and the check symbol 105 . The multiplexer 111 outputs the encoded sequence 106 .

[0017] figure 2 is the view of the PN sequence generator configured according to this embodiment. The flip-flops 203(1)-203(n) in the PN sequencer oper...

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Abstract

The invention discloses a design method for a two-dimensional interleaving machine based on a pseudo-random PN sequence. Before the prior packet interleaving machine sends data, the invention adopts a rower and a line sign of an address interleaving packet matrix generated by the same PN sequence generator, and then reads out the data. Based on the principle, the invention establishes the design method of the two-dimensional interleaving machine, and describes a work method of each component.

Description

technical field [0001] The invention belongs to the field of wireless communication, and in particular relates to an interleaver and a deinterleaver used in codec modulation. Background technique [0002] Error correction coding is an important part of digital communication systems. In 1948, Shannon's "Mathematical Theory in Communication" proposed the famous noisy channel coding principle, which laid the cornerstone of error control codes. Since the 1940s, many remarkable achievements have been made in the research on error correction coding technology. At the International Conference on Communications (ICC'93) in 1993, Professor Claude Berrou of the British University of Communications in France proposed a Turbo code scheme. Due to the good use of the random coding and decoding conditions in Shannon's channel coding theorem, this coding method has obtained a decoding performance that is almost close to the limit of Shannon's theory. [0003] The design of the interleave...

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Application Information

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IPC IPC(8): H03M13/27H04L1/00
Inventor 胡剑浩张承海
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA