US 11,876,538 B2Granted

Convolutional code rate matching method and wireless communication apparatus

AssigneeHuawei Technologies Co., Ltd.

InventorsGuido Montorsi, Sergio Benedetto, Wei Lin, Yan Xin, Ming Gan

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Abstract

A convolutional code rate matching method and a communication apparatus are provided. A puncturing pattern of a second codeword at a second code rate is obtained based on a puncturing pattern of a first codeword at a first code rate. A second puncturing location set of the second codeword is a subset of a first puncturing location set of the first codeword. When a transmit device decreases a code rate from the first code rate to the second code rate, a redundant bit is sent at a location of a complementary set of the second puncturing location set relative to the first puncturing location set. Compared with the first puncturing location set, the second puncturing location set may obtain more incremental redundant bits, to decrease a channel encoding rate. This can improve decoding performance of a convolutional code.

Claims11

Dependent claims

A convolutional code rate matching method, comprising:

generating a second codeword, wherein a puncturing pattern of the second codeword is generated based on a puncturing pattern of a first codeword, the puncturing pattern of the first codeword comprises a first puncturing location set, the puncturing pattern of the second codeword comprises a second puncturing location set, and the second puncturing location set is a subset of the first puncturing location set;
and
sending the second codeword,
wherein the first codeword corresponds to a first code rate, the second codeword corresponds to a second code rate, either the first code rate or the second code rate is a code rate in Table A, the first puncturing location set comprises a first puncturing location corresponding to the first code rate in Table A and all puncturing locations located before the first puncturing location in Table A, and the second puncturing location set comprises a second puncturing location corresponding to the second code rate in Table A and all puncturing locations located before the second puncturing location in Table A;
and
Table A is shown as follows:
TABLE A
Code rate
Index of a puncturing location
0.500
0.508
59
0.517
31
0.526
11
0.536
39
0.545
51
0.556
19
0.566
3
0.577
43
0.588
23
0.600
15
0.612
47
0.625
55
0.638
27
0.652
7
0.667
35
0.682
0
0.698
36
0.714
8
0.732
32
0.750
53
0.769
21
0.789
4
0.811
45
0.833
16
0.857
28
0.882
24
0.909
48
0.938
56
0.968
38
1.000
46

67 more elements

A communication apparatus, comprising:

a processor, configured to generate a second codeword, wherein a puncturing pattern of the second codeword is generated based on a puncturing pattern of a first codeword, the puncturing pattern of the first codeword comprises a first puncturing location set, the puncturing pattern of the second codeword comprises a second puncturing location set, and the second puncturing location set is a subset of the first puncturing location set;
and
a transceiver, configured to send the second codeword,
wherein the first codeword corresponds to a first code rate, the second codeword corresponds to a second code rate, either the first code rate or the second code rate is a code rate in Table A, the first puncturing location set comprises a first puncturing location corresponding to the first code rate in Table A and all puncturing locations located before the first puncturing location in Table A, and the second puncturing location set comprises a second puncturing location corresponding to the second code rate in Table A and all puncturing locations located before the second puncturing location in Table A;
and
Table A is shown as follows:
TABLE A
Code rate
Index of a puncturing location
0.500
0.508
59
0.517
31
0.526
11
0.536
39
0.545
51
0.556
19
0.566
3
0.577
43
0.588
23
0.600
15
0.612
47
0.625
55
0.638
27
0.652
7
0.667
35
0.682
0
0.698
36
0.714
8
0.732
32
0.750
53
0.769
21
0.789
4
0.811
45
0.833
16
0.857
28
0.882
24
0.909
48
0.938
56
0.968
38
1.000
46

67 more elements

A computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and when the computer instructions are run on a computer, a method as following is implemented:

generating a second codeword, wherein a puncturing pattern of the second codeword is generated based on a puncturing pattern of a first codeword, the puncturing pattern of the first codeword comprises a first puncturing location set, the puncturing pattern of the second codeword comprises a second puncturing location set, and the second puncturing location set is a subset of the first puncturing location set;
and
sending the second codeword,
wherein the first codeword corresponds to a first code rate, the second codeword corresponds to a second code rate, either the first code rate or the second code rate is a code rate in Table A, the first puncturing location set comprises a first puncturing location corresponding to the first code rate in Table A and all puncturing locations located before the first puncturing location in Table A, and the second puncturing location set comprises a second puncturing location corresponding to the second code rate in Table A and all puncturing locations located before the second puncturing location in Table A;
and
Table A is shown as follows:
TABLE A
Code rate
Index of a puncturing location
0.500
0.508
59
0.517
31
0.526
11
0.536
39
0.545
51
0.556
19
0.566
3
0.577
43
0.588
23
0.600
15
0.612
47
0.625
55
0.638
27
0.652
7
0.667
35
0.682
0
0.698
36
0.714
8
0.732
32
0.750
53
0.769
21
0.789
4
0.811
45
0.833
16
0.857
28
0.882
24
0.909
48
0.938
56
0.968
38
1.000
46

67 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/856,773Filed 1 Jul 2022 · continuation
Priority: CN 202010006457.93 Jan 2020
Published: US 2022/0337272 A120 Oct 2022
Granted: 16 Jan 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H03M 13/6362
Error control coding in combination with rate matching: by puncturing
H03M 13/6375
Using rate compatible puncturing or complementary puncturing: rate compatible punctured convolutional [RCPC] codes
H03M 13/23
Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words:…
H03M 13/235
Using convolutional codes, e.g. unit memory codes: encoding of convolutional codes, e.g. methods or arrangements for parallel or block-wise encoding