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Rate matching method and device of Polar code, and communication equipment
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A rate matching and channel technology, applied in the field of communication, can solve problems such as reducing the performance of Polar codes
Active Publication Date: 2018-10-23
HUAWEI TECH CO LTD
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Using random punching to achieve rate matching reduces the performance of Polar codes
Method used
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Embodiment 1
[0075] Embodiment 1 of the present application provides a Polar code rate matching method 300a, such as Figure 3a As shown, specifically, the rate matching method includes:
[0076] S310. Acquire an information bit sequence, the information bit sequence includes K information bits, and the code length of the mother code used to encode the information bit sequence is N;
[0077] S320, the mother code corresponds to N subchannels, and the N subchannels include S intervals, and the position of the information bits mapped in each interval is determined according to the number of information bits mapped in each interval, the construction sequence and the rate matching method , the construction sequence is used to indicate the reliability ranking of the N subchannels, and S is a positive integer;
[0078] The construction sequence in the present invention includes but not limited to the reliability sorting sequence Reliability sequence PW 1 N , normalized reliability sequence ...
example 1
[0083] Example 1: When the N subchannels include two intervals [1, N / 2] and [N / 2+1, N], the adjustment amount ΔK corresponding to the interval [1, N / 2] is calculated by the following formula :
[0084]
[0085] Among them, -ΔK is the adjustment amount corresponding to the interval [N / 2, N], P is the number of holes punched or shortened in the interval [1, N / 2] under the rate matching mode, and N is the mother code The code length, K1 is the number of sub-channels in the interval [1, N / 2] in which the first K sub-channels with the highest reliability in the constructed sequence are located.
example 2
[0086] Example 2: Unevenly divide the polarized channel sequence number interval [1, N] into 3 (ie S=3) polarized channel sequence number intervals [1, N / 4], [N / 4+1, N / 2 ] and [N / 2+1, N], the adjustments corresponding to the three intervals are in turn Δk 1 , Δk 2 and Δk 3 , the adjustment amount ΔK corresponding to each interval is given as follows j , where 1≤j≤3, N is the code length, and P is the total number of punctures or shortens.
[0087] When P
[0088]
[0089]
[0090]
[0091] When N / 4≤P
[0092] Δk 1 =-k 1
[0093]
[0094]
[0095] It should be noted that the rounding function int() includes but is not limited to rounding up, rounding down, rounding, etc.; in addition, the adjustment amount can be negative, and the adjustment amount being negative means that the number of information bits will decrease .
[0096] Since there are S polarized channel sequence number intervals, and each polarized channel sequence number interval has ...
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Abstract
The invention discloses a rate matching method and device of a Polar code, and communication equipment. The rate matching method comprises the following steps: acquiring an information bit sequence, wherein the information bit sequence comprises K information bits, and the code length of a master code for encoding the information bit sequence is N, the master code is corresponding to N sub-channels, the N sub-channels comprises S intervals, the location of the mapped information bit in each interval is determined according to the amount of the mapped information bit in each interval, a construction sequence and rate matching way, the construction sequence is used for indicating the reliability sorting of the N sub-channels, and the S is the positive integer; and performing Polar code encoding and rate matching on the information bit sequence according to the location of the mapped information bit in each interval. The performance of the Polar performance can be improved through the location of the information bit mapped by N sub-channels determined by adopting the above rating matching method disclosed by the invention.
Description
technical field [0001] The embodiments of the present application relate to the communication field, and more specifically, relate to a polar code rate matching method and device, and a communication device. Background technique [0002] The rapid evolution of wireless communication indicates that the future 5G communication system will present some new features. The three most typical communication scenarios include eMBB, mMTC and URLLC. The requirements of these communication scenarios will pose new challenges to the existing LTE technology. As the most basic wirelessaccess technology, channel coding is one of the important research objects to meet the needs of 5G communication. After the Shannon theory was put forward, scholars from various countries have been working hard to find encoding and decoding methods that can reach the Shannon limit and have relatively low complexity. Although Turbo codes and re-proposed LDPC codes, which have become mainstream research direct...
Claims
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