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Hybrid automatic repeat request transmission method based on polarization code

A technology of hybrid automatic retransmission and transmission method, which is applied in the field of channel coding of digital communication, can solve problems such as large system throughput and channel capacity, not particularly bad channels, and limited adjustment range of code length, etc., to achieve improved The probability of correct decoding, overall complexity reduction, and the effect of accurately estimating throughput

Active Publication Date: 2013-09-04
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0022] The disadvantage of the above-mentioned prior art is that because the code length of a practical coding system cannot be infinitely long, after performing polarization operations on a limited number of channels, there will still be some channels whose transmission performance is not particularly good or not particularly bad
Therefore, under the existing decoding methods, the anti-noise performance of polar codes with limited code length is not ideal
Therefore, directly applying the polar code to the actual system cannot obtain a very ideal throughput rate
On the other hand, most of the HARQ systems that have been applied in actual systems are based on turbo codes or LDPC codes. Due to the limitation of the code construction method, the adjustment range of the code length is limited, resulting in a large system throughput and channel capacity. the distance

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  • Hybrid automatic repeat request transmission method based on polarization code
  • Hybrid automatic repeat request transmission method based on polarization code
  • Hybrid automatic repeat request transmission method based on polarization code

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Embodiment Construction

[0043] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0044] The operation content of the hybrid automatic repeat request (HARQ) transmission method based on the puncturing polar code of the present invention is: the signal transmitting end performs a polar coding on the information bit sequence to be sent, and the obtained coded bits are punctured and are Send it into the channel for transmission; the signal receiving end decodes the received signal, and performs a cyclic redundancy code (CRC) check on the decoding result; if the verification is passed, the signal receiving end sends a confirmation to the sending end through the feedback link (ACK) signal; otherwise, send a non-acknowledgment (NACK) signal to the sending end; if the sending end receives the NACK signal, part of the information bits will be sent direc...

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Abstract

The invention discloses a hybrid automatic repeat request transmission method based on a polarization code. The hybrid automatic repeat request transmission method based on the polarization code comprises the following steps: after a coding bit sequence obtained after polarization coding is carried out to a sent information bit sequence is punched via a sending end, sending into a channel to be transmitted; decoding a received signal by a receiving end for CRC (cyclic redundancy check); if the received signal passes the check, feeding back an ACK (acknowledgement character) signal to the sending end, and otherwise, sending a NACK (negative acknowledgement) signal; if the sending end receives the NACK signal, sending one part of uncoded information bits to a receiving end again; according to the coding bit received for the first time and a newly-received information bit, decoding again by the receiving end; if a decoding result still does not pass the CRC, sending the other part of uncoded information bits to the receiving end again by the sending end; according to the coding bit received for the first time, the information bit received in the previous time and the newly-received information bit, decoding again by the receiving end; continuously executing the process; and finishing one whole transmission process until the sending end receives the ACK signal or the number of sending times reaches a preset maximum value.

Description

technical field [0001] The invention relates to a hybrid automatic repeat request transmission method based on polar codes, which is used to solve the problem of errors in transmitted data due to the interference of transmission channels on the communication process in digital communication systems; In digital communication systems where polar codes are used as error-correcting codes, a method for signal transmission through hybrid automatic repeat requests. The invention belongs to the technical field of channel coding of digital communication. Background technique [0002] Polar Codes (Polar Codes) is a constructive channel coding method proposed by E.Arikan in 2009 that has been strictly proven to achieve channel capacity. Before polar encoding, N=2 n independent binary input channels (or N consecutive uses of the same channel, i.e. N available time slots of a channel), the application figure 1 The shown basic unit of channel polarization repeatedly polarizes binary in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04L1/00
CPCH03M13/13H03M13/6362
Inventor 牛凯陈凯
Owner BEIJING UNIV OF POSTS & TELECOMM
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