Hybrid automatic repeat request method based on polarization code and device using same

A hybrid automatic retransmission and polarization coding technology, applied in the field of wireless communication, to achieve the effects of low cost, easy implementation, and simple coding and decoding

Inactive Publication Date: 2017-07-07
SHANGHAI RES CENT FOR WIRELESS COMM
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  • Abstract
  • Description
  • Claims
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  • Hybrid automatic repeat request method based on polarization code and device using same
  • Hybrid automatic repeat request method based on polarization code and device using same
  • Hybrid automatic repeat request method based on polarization code and device using same

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Embodiment Construction

[0032] The technical content of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] Such as figure 2 As shown, when sending the information sequence, the sending end first performs a polar encoding on the information sequence. The bit sequence for the first transmission, that is, the bit sequence encoded by the information sequence for the first transmission Where N is the code length after encoding.

[0034] The encoded codeword is sent to the receiving end through the channel, and the receiving end performs channel decoding on the received signal, and performs CRC check on the decoding result. If the test is passed, an acknowledgment signal (ACK) is sent to the sending end through the feedback link; otherwise, a non-acknowledgment signal (NACK) is sent. If the sending end receives NACK, it means that the receiving end failed to receive the information sequence and needs to send it again...

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Abstract

The invention discloses a hybrid automatic repeat request method based on a polarization code and a device using the same. The method comprises the following step: when repeat is initiated automatically under the condition of transmission failure, first transmission bit sequences polarization-coded at a certain code rate are linearly combined to get second transmission bit sequences, wherein the code rate of the second transmission bit sequences is lower than that of the first transmission bit sequences. The second transmission bit sequences are set to linear combination of the first transmission bit sequences. After second transmission, soft information received through two times of transmission is serially combined according to a certain way. Decoding is performed with a lower-rate and longer polarization code. Certain coding gain is achieved while diversity gain is obtained.

Description

technical field [0001] The invention relates to a hybrid automatic repeat request method, in particular to a polar code-based hybrid automatic repeat request method, and also relates to a device using the method, belonging to the technical field of wireless communication. Background technique [0002] With the further expansion of the scope of wireless communication services, the Internet of Things, sensor networks, data acquisition and other businesses have an increasing demand for communication. These networks have the characteristics of small data packets, low power consumption, and massive connections. There is an urgent need for low-complexity short-packet channel coding. [0003] Polar codes have a deterministic construction method, which is the first and only known channel coding method that has been strictly proved to "reach" the limit of channel capacity. According to the channel polarization theory proposed by Arikan, by occupying the channel W N times, N independ...

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Application Information

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IPC IPC(8): H04L1/18H04L1/00
CPCH04L1/1819H04L1/0009
Inventor 钱骅戴胜辰朱鸿斌杨旸胡宏林
Owner SHANGHAI RES CENT FOR WIRELESS COMM
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