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Rate adaption method and device

A technology of rate matching and starting position, applied in the field of communication, can solve the problem of high probability of rate matching processing overlapping phenomenon, and achieve the effect of avoiding overlapping phenomenon and enhancing performance

Active Publication Date: 2013-03-27
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0032] The present invention is made in consideration of the high probability of occurrence of rate matching processing overlap phenomenon in the related art. Therefore, the main purpose of the present invention is to provide a rate matching method and device to solve the above problems

Method used

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  • Rate adaption method and device

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0100] Example 1, the present invention will be described in detail below by taking 1 / 3 code rate as an example (but not limited to 1 / 3 code rate).

[0101] Such as Figure 11 Shown, under the situation of 1 / 3 code rate, the processing procedure of the present invention is as follows:

[0102] (111) The information that length is K is sent to 1 / 3 code rate Turbo code encoder, produces a system bit stream S and the first, the second parity bit stream P1 and P2;

[0103] (112) For the code word compiled by the Turbo encoder, the system bit stream S and the first and second parity bit streams P1 and P2 are respectively interleaved in a block through a sub-interleaver to generate a new system bit stream S and the first bit stream 1. The second verification bit streams P1 and P2;

[0104] (113) Put the system bits in front of the circular buffer, and the first and second parity bit streams are interleaved and placed behind the system bit streams through an inter-block interleaver...

example 2

[0128] In Example 2, the present invention will be described in detail below by taking 1 / 3 code rate as an example (but not limited to 1 / 3 code rate).

[0129] Such as Figure 12 Shown, under the situation of 1 / 3 code rate, the processing procedure of the present invention is as follows:

[0130] (121) The information that length is K is sent to 1 / 3 code rate Turbo code encoder, produces a system bit stream S and the first, the second parity bit stream P1 and P2;

[0131] (122) the code word compiled by the Turbo encoder, the system bit stream S and the first and second check bit streams P1 and P2 are stored in the memory;

[0132] (123) For the codeword in the memory, the system bit stream S and the first and second parity bit streams P1 and P2 are respectively interleaved in the block through the address generator to generate a new system bit stream S and the first and second check bit streams Verify bit streams P1 and P2 to form a virtual circular buffer;

[0133] (124) ...

Embodiment 1

[0160] In the first embodiment, a rate matching device is provided.

[0161] Such as Figure 15 As shown, the rate matching device according to Embodiment 1 includes:

[0162] Encoder (also can be referred to as mother code encoder) 10, is used for encoding information grouping, produces the code word that length is L;

[0163] An interleaving module (also referred to as an interleaver) 20, configured to interleave a codeword sequence of length L;

[0164] Circular buffer (not shown), for storing the interleaved mother code word sequence of length L;

[0165] The rate matcher (also referred to as a sub-packet generating device) 30 is configured to select codeword bits from the mother code codeword to generate a currently transmitted HARQ sub-packet. Further includes:

[0166] In the case of the first transmission of a HARQ subpacket, select the first L from the mother code word of length L 1 bits constitute the HARQ subpacket for the first transmission, where L 1 is the ...

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Abstract

The present invention discloses a rate matching method and device. The method includes the following steps. An information bit sequence is encoded and interleaved to obtain a mother codeword with the length L, wherein the mother codeword includes a systematic bit part and a parity bit part. In the case of the first HARQ subpacket transmission, the first L1 bits starting from the predetermined position in the mother codeword are selected to compose the HARQ subpacket of the first transmission, wherein L1 is the predetermined length of the HARQ subpacket of the first transmission. In the case of the second HARQ subpacket transmission, the last L2 bits of the mother codeword with the length L are selected to compose the HARQ subpacket of the second transmission, wherein L2 is the predetermined length of the HARQ subpacket of the second transmission. By means of the present invention, the subpacket changes its bit selection solution from the mother code, the possibility of overlapping can be reduced and the coverage over the whole mother code can be increased.

Description

technical field [0001] The present invention relates to the communication field, and in particular, relates to a rate matching method and device. Background technique [0002] Digital communication system is a very common communication system at present. figure 1 Shows the structure of a digital communication system in general. Such as figure 1 As shown, generally, a digital communication system is composed of a transmitter, a channel, and a receiver. The transmitter usually includes a source, a source encoder, a channel encoder, and a modulator, and the receiver usually includes a demodulator, channel Decoder, source decoder and sink, there is a channel (or storage medium) between the transmitting end and the receiving end, and there is a noise source in the channel. [0003] In a digital communication system, the channel coding link (including channel coding, modulation and demodulation, etc.) is the most critical technology in the physical layer of the entire digital c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18H04L1/00
CPCH04L1/1819H04L1/0067
Inventor 徐前子徐俊袁志锋许进胡留军卢科学
Owner ZTE CORP