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Encoding method and encoding apparatus based on mixed automatic retransmission communication

A technology of hybrid automatic retransmission and coding methods, applied in the directions of coding, coding components, code conversion, etc., can solve the problems of increasing the complexity of the mobile station, the cost of the mobile station, high power consumption, and increasing the system overhead, so as to reduce the cost. and power consumption, simplifying processing, reducing the effect of system overhead

Active Publication Date: 2011-11-30
DATANG MOBILE COMM EQUIP CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] 1. It cannot check itself, and needs to add cyclic redundancy check code (CRC) check bits, which increases system overhead
[0006] 2. Poor performance when compiling medium and long codes
[0007] 3. For downlink transmission services with high data rates, the processing workload of the algorithm is concentrated on the mobile station, which increases the implementation complexity of the mobile station, resulting in high cost, high power consumption and short standby time of the mobile station

Method used

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  • Encoding method and encoding apparatus based on mixed automatic retransmission communication
  • Encoding method and encoding apparatus based on mixed automatic retransmission communication
  • Encoding method and encoding apparatus based on mixed automatic retransmission communication

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Embodiment Construction

[0046] The present invention will be further described in detail below through specific embodiments and accompanying drawings.

[0047] The core idea of ​​the present invention is: using layered low-density parity check code (LDPC) as an error correction code, and using the LDPC code at the data sending end to perform layered coding on pre-sent data.

[0048] figure 1 It is a flowchart of the embodiment of the present invention. see figure 1 , the process includes:

[0049] Step 101: Construct parity check matrices of each layer of the layered LDPC code according to the service and the retransmission HARQ mechanism.

[0050] Step 102, the data sending end encodes the pre-transmission data with the N-th layer parity check matrix of the LDPC code to obtain the N-th layer data, and then sends it.

[0051]The initialization value of N is 1, and this step is to use the first-layer check matrix of the LDPC code to encode the pre-transmitted data to obtain the first-layer data. ...

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Abstract

The invention discloses a coding method based on the hybrid automatic retransmission (HARQ) communication, according to the method, the layering LDPC code is used as the error correcting code, and the layering LDPC code is used to perform the layering coding on the received data at the data transmitting end. The invention also discloses a coding device based on the hybrid automatic retransmission communication, comprising an error correcting code structural unit, for structuring each layer of check matrix of the layering LDPC code, and using the layering LDPC code as the error correcting code. The device also includes a code unit arranged at the data transmitting end, for performing the layering code on the received data through the layering LDPC code structured by the error correcting code structural unit. According to the method and the device, the cost of the system is reduced, the coding delay is shortened, the coding performance is advanced, which is applicable for the high speed data operation.

Description

technical field [0001] The present invention relates to communication technology, in particular to a coding method and coding device based on Hybrid Automatic Repeat reQuest (HARQ, Hybrid-Automatic Repeat reQuest) communication. Background technique [0002] The most notable feature of current communication technology is the complexity and time-varying nature of communication system channels, and the resulting bit errors. In view of this characteristic, at present, automatic repeat request (ARQ, Automatic Repeat reQuest) and forward error correction (FEC, Forward Error Correction) are usually used for error control. ARQ and FEC are technologies for error control using error detection codes and error correction codes respectively. The principle of ARQ is that the receiving end feeds back information through the reverse channel, so that the sending end resends the wrong data packet, and stops resending until the receiving end judges that it has been received correctly; the pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18H03M13/00
Inventor 曹晏波李洪强安璐乔元新孙建勋董育新
Owner DATANG MOBILE COMM EQUIP CO LTD
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