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A Channel Coding and Decoding Method and Device for Adaptive Sampling Rate

An adaptive sampling and encoding device technology, applied in the field of communication, can solve problems such as delay fluctuations, different numbers of data packets, and lower reliability of delay, so as to reduce delay, increase the probability of correct decoding, and reduce the amount of calculation Effect

Active Publication Date: 2020-08-07
HUAWEI TECH CO LTD +1
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Problems solved by technology

[0003] However, for a time-varying rate source, since the number of data packets per unit time is different
When uniform sampling probability is used, delay fluctuations will be generated on the decoding side, resulting in reduced delay reliability

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  • A Channel Coding and Decoding Method and Device for Adaptive Sampling Rate

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Embodiment Construction

[0036]Channel coding is an important technique in wireless communication to solve data transmission errors in time-varying wireless channels. Generally, channel coding is a specific coding operation on the source data, which will introduce a certain degree of redundancy. When the time-varying attenuation of the wireless channel causes errors in decoding at the receiving end, the decoding of the channel coding can The error is identified and, to a certain extent, corrected or restored to the data in which the error occurred, thereby improving the efficiency and reliability of the transmission. The degree of redundancy introduced in channel coding determines the error correction capability of the receiving end. Generally, the higher the degree of redundancy introduced in channel coding, the lower the coding rate, the lower the channel utilization rate, and the stronger the error correction capability of the receiving end, which is resistant to wireless The stronger the time-vary...

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Abstract

The invention discloses a sampling frequency self-adaptive channel coding method and device. The method comprises the steps of configuring a time window of preset duration for information source data, wherein the time window is used for dividing one or more information source data units according to the information source data, and each information source data unit comprises a plurality of data packets; determining a sampling probability according to the number of the data packets in each information source data unit; sampling and coding the information source data according to the sampling probability, thereby forming one or more coding data packets; and sending the one or more coding data packets and the sampling probability to a decoding device, thereby carrying out coding by the decoding device. The technical scheme provided by the invention has the advantage of improving the time delay reliability.

Description

technical field [0001] The present application relates to the communication field, and in particular to a channel coding and decoding method and device for adaptive sampling rate. Background technique [0002] Fountain code (English full name: Fountain Code) is an existing rateless channel coding method, which has been adopted in the broadcast channel by the LTE-A system. Fountain Code is the basis of the rateless channel coding adopted by the LTE-A broadcast channel. In the process of rateless channel coding, the source data is divided into data packets (English: packet) of equal size. The basic unit of channel coder operation is Data packet, the data obtained by decoding at the decoder is also based on the data packet. When using Fountain Code for channel coding of source data, a set of several data packets is usually defined as a coding batch on the coding side, and coding is performed in batches (English: batch). Specifically, the encoding side uniformly extracts and e...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H03M13/37
CPCH03M13/3761H04L1/0009H04L1/0041
Inventor 孙慨然罗泽宙吴大鹏庄宏成
Owner HUAWEI TECH CO LTD
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