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Interleaver apparatus and receiver for a signal produced by the interleaver apparatus

一种交织器、接收机的技术，应用在数字传输领域，能够解决码字增加等问题，达到减小端到端延迟、减小管理成本以及存储器成本的效果

Active Publication Date: 2009-06-24
FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG EV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this is not yet so important in relatively small codewords, the problem increases the longer the codewords become

Method used

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  • Interleaver apparatus and receiver for a signal produced by the interleaver apparatus
  • Interleaver apparatus and receiver for a signal produced by the interleaver apparatus
  • Interleaver apparatus and receiver for a signal produced by the interleaver apparatus

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Embodiment Construction

[0068] Before explaining the figures in detail, as will be based on figure 1 Described, the specific advantages of the preferred interleaver arrangement will first be shown. In particular, in the case of long convolutional interleavers, the invention allows for an efficient implementation, which yields specific advantages not only in the invention itself, but also in combination with specific decoder strategies.

[0069] It is an object of the present invention to allow for efficient implementation of an interleaver structure, particularly in very long time interleavers. The advantage of this structure lies in the combination with the decoder strategy.

[0070] Decoder strategies can be subdivided into the following groups.

[0071] - No channel state information

[0072] Errors need to be identified and corrected without additional information.

[0073] -soft decoding

[0074] The probability of a transmission error can be estimated for each bit or symbol.

[0075] - e...

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Abstract

A convolution interleaver for processing a codeword which is derived from an input block of symbols using a redundancy-adding code (22) and which has more symbols than the input block, where the codeword has a sequence of interleaving units, each interleaving unit having at least two symbols, comprises an interleaving device (10). The interleaving device alters the sequence of interleaving units in order to obtain an interleaved codeword which has an altered sequence of interleaving units. In particular, the interleaving device does not alter the order of the symbols within an interleaving unit. However, the order of the interleaving units in the codeword is altered among one another or in respect of a preceding or succeeding codeword.

Description

technical field [0001] The present invention relates to digital transmission technology and, in particular, to a transmission concept particularly suitable for time-varying transmission channels as can be found in mobile radio and broadcasting. Background technique [0002] like Image 6 As shown, time interleaving and / or frequency interleaving combined with error correction codes (Forward Error Correction, FEC) belongs to the basic principles of transmission technology. [0003] Here an information word consisting of information bits is input into an FEC encoder which builds a codeword, ie a vector of code symbols or code bits, from this information word. The codewords and / or blocks thus formed are passed to an interleaver. The interleaver changes the order of the symbols and transmits the resulting mixed symbols onto the transport channel. Re-sorting of symbols can take place in the time axis ("time interleaving") and / or the frequency axis ("frequency interleaving"). ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M13/27
CPCH03M13/275H03M13/2732H04L1/0071H03M13/2707H03M13/27
Inventor 恩斯特·埃伯莱因马尔科·布瑞林塞德里克·凯普霍尔格·斯戴德里艾伯特·阿伯格
Owner FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG EV
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