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Channel interleaving method, channel interleaver and channel encoding device

A channel interleaver and channel interleaving technology, applied in digital transmission systems, electrical components, error prevention, etc., can solve the problems of decoder performance impact, IEEE802.16e channel interleaver error bits, etc.

Active Publication Date: 2015-08-26
HFI INNOVATION INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Due to intra-block and inter-block continuity issues, the IEEE 802.16e channel interleaver produces bursts of erroneous bits and decoder performance suffers

Method used

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  • Channel interleaving method, channel interleaver and channel encoding device
  • Channel interleaving method, channel interleaver and channel encoding device
  • Channel interleaving method, channel interleaver and channel encoding device

Examples

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Embodiment approach

[0060] Figure 13A , 13B with 13C is Figure 4 A schematic diagram of other different implementations of the channel interleaver 43 is shown. exist Figure 13A In the example of , the bit separation module 46 receives a plurality of encoded bit sets 101 from the FEC encoder 42 and distributes the encoded bits to a plurality of information sub-blocks and parity sub-blocks. The sub-block interleaver 47 interleaves all sub-blocks independently. Bit grouping module 48 multiplexes and reassembles the interleaved sub-blocks into multiple sub-blocks. The constellation based permutation module receives the interleaved bits 105 from the bit grouping module 48 and scrambles the interleaved bits to rearranged bits 106 . exist Figure 13B In the example of , constellation-based permutation module 49 receives interleaved bits 105 from sub-block interleaver 47 and scrambles the interleaved bits to rearranged bits 106 . The bit grouping module 48 then multiplexes and regroups the rear...

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Abstract

A channel interleaver comprises a novel constellation-based permutation module. The channel interleaver first receives a plurality of sets of encoded bits generated from an FEC encoder. The encoded bits are distributed into multiple subblocks and each subblock comprises a plurality of adjacent bits. A subblock interleaver interleaves each subblock and outputs a plurality of interleaved bits. The constellation-based permutation module rearranges the interleaved bits and outputs a plurality of rearranged bits. The rearranged bits are supplied to a symbol mapper such that a plurality of consecutively encoded bits in the same set of the encoded bits generated from the FEC encoder is prevented to be mapped onto the same level of bit reliability of a modulation symbol. In addition, the plurality of adjacent bits of each subblock is also prevented to be mapped onto the same level of bit reliability to achieve constellation diversity and to improve decoding performance.

Description

[0001] This application is a divisional application. The international filing date of the parent case of this case is December 31, 2009. The international application number or patent number is PCT / CN2009 / 076334, and the national application number or patent number is 200980100885.X. The stage date is May 5, 2010, and the title of the invention is: channel interleaving method, channel interleaver and channel coding device. technical field [0002] The present invention relates to interleaver design for error correcting codes, and in particular to constellation-based permutations for channel interleaving. Background technique [0003] Most error correction codes (Error Correction Code, ECC) are designed to correct random channel errors. Decoder performance is often affected by a cascade of channel errors. Channel interleaving improves performance by averaging out burst channel errors. At the transmitter, channel interleaving scrambles the coded bits so that the effects of s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04L1/00H04B7/02
CPCH04L27/34H04L1/0071H04L1/0066H04L1/0042
Inventor 吴秋萍廖培凯张育豪陈义升
Owner HFI INNOVATION INC
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