# US 2021/0242967 A1 · Parity check bits for non-coherent communication

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- Number: US 2021/0242967 A1
- Document ID: US20210242967A1
- Status: Published application
- Kind: A1
- Application number: 17/166,993
- Filed: 2021-02-03
- Published: 2021-08-05
- Earliest claimed: 2020-02-04
- Assignees: QUALCOMM Incorporated
- Applicants: QUALCOMM Incorporated
- Inventors: Wei YANG; Yi HUANG; Hung Dinh LY; Gokul SRIDHARAN; Hwan Joon KWON; Wanshi CHEN
- Web page: https://patentgrep.com/patent/US20210242967A1

## CPC

- H04L 1/0061: {Error detection codes}
- H04L 1/0063: {Single parity check}
- H04B 7/0413: MIMO systems
- H04J 13/0074: {Code shifting or hopping}
- H04J 13/0077: {Multicode, e.g. multiple codes assigned to one user}
- H04L 1/0041: {Arrangements at the transmitter end}
- H04L 1/0047: {Decoding adapted to other signal detection operation (in conjunction with sequence estimation or equalization H04L25/03286)}
- H04L 1/0065: {Serial concatenated codes}
- H04L 1/0072: {Error control for data other than payload data, e.g. control data}
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04B: TRANSMISSION
- H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S)

## Abstract

A method of wireless communication at a transmitting device includes adding parity check bits to a set of information bits. The method also includes generating a non-coherent transmission signal by mapping the parity check bits and the set of information bits into a sequence of complex symbols. Further, the method may include transmitting the non-coherent transmission signal to a receiving device. A method of wireless communication at a receiving device includes receiving, from a transmitting device, a non-coherent signal having at least one segment. Each segment comprises a sequence of complex symbols corresponding to information bits and parity check bits. The method also includes jointly detecting the sequences from each segment of the received non-coherent signal by using the parity check bits.

## Claims

### Claim 1

A method of wireless communication at a transmitting device, comprising:
adding parity check bits to a set of information bits;
generating a non-coherent transmission signal by mapping the parity check bits and the set of information bits into a sequence of complex symbols; and
transmitting the non-coherent transmission signal to a receiving device.

### Claim 2 (depends on 1)

The method of claim 1, in which the parity check bits comprise cyclic redundancy check (CRC) bits.

### Claim 3 (depends on 2)

The method of claim 2, in which the parity check bits further comprise additional parity check bits based on the set of information bits and/or the CRC bits.

### Claim 4 (depends on 1)

The method of claim 1, in which generating the non-coherent transmission signal comprises:
segmenting the set of information bits and the parity check bits into a plurality of segments comprising subsets of information plus parity bits; and
mapping each subset to a respective sequence of a plurality of sequences for the non-coherent transmission signal, each sequence comprising n complex symbols.

### Claim 5 (depends on 4)

The method of claim 4, in which the parity check bits comprise cyclic redundancy check (CRC) bits and additional parity check bits that are based on at least two different subsets of the set of information plus parity bits and/or at least two different subsets of the CRC bits.

### Claim 6 (depends on 4)

The method of claim 4, in which the plurality of sequences are concatenated to form the sequence of complex symbols for the non-coherent transmission signal.

### Claim 7 (depends on 4)

The method of claim 4, in which the plurality of sequences are super-positioned to form the sequence of complex symbols for the non-coherent transmission signal.

### Claim 8 (depends on 4)

The method of claim 4, further comprising determining a quantity of the plurality of segments based on a quantity of bits for a payload, in response to the set of information bits comprising the payload.

### Claim 9 (depends on 1)

The method of claim 1, in which the information bits comprises an uplink control information (UCI) payload transmitted on a physical uplink control channel (PUCCH).

### Claim 10 (depends on 1)

The method of claim 1, in which the parity check bits comprise a first quantity of cyclic redundancy check (CRC) bits when a payload corresponding to the set of information bits is smaller than a threshold and the parity check bits comprise a second quantity of bits when the payload corresponding to the set of information bits is greater than the threshold.

### Claim 11 (depends on 1)

The method of claim 1, in which the parity check bits comprise a first quantity of cyclic redundancy check (CRC) bits and a second quantity of additional parity check bits when a payload corresponding to the set of information bits is smaller than a threshold, and the parity check bits comprise a third quantity of CRC bits a fourth quantity of additional parity check bits when the payload corresponding to the set of information bits is greater than the threshold.

### Claim 12 (depends on 1)

The method of claim 1, further comprising determining a quantity of parity check bits based on a quantity of segments into which the set of information bits are partitioned.

### Claim 13

A method of wireless communication at a receiving device, comprising:
receiving, from a transmitting device, a non-coherent signal having at least one segment, each segment comprising a sequence of complex symbols corresponding to information bits and parity check bits; and
jointly detecting the sequence from each segment of the received non-coherent signal by using the parity check bits.

### Claim 14 (depends on 13)

The method of claim 13, in which the jointly detecting comprises:
generating a list of candidates for each sequence; and
finding the sequence in each list of candidates based on the parity check bits.

### Claim 15 (depends on 14)

The method of claim 14, in which finding the sequence further comprises finding the sequence such that corresponding information bits and parity check bits of the sequence in each list of candidates satisfy parity check conditions represented by the parity check bits.

### Claim 16 (depends on 15)

The method of claim 15, in which a product of a size of each list is smaller than a threshold that is based on a predetermined false alarm rate and a quantity of parity check bits.

### Claim 17 (depends on 13)

The method of claim 13, further comprising determining a quantity of parity check bits based on a quantity of bits for a payload in response to the information bits comprising the payload.

### Claim 18 (depends on 13)

The method of claim 13, further comprising determining a quantity of the at least one segment based on a quantity of bits for a payload in response to the information bits comprising the payload.

### Claim 19 (depends on 13)

The method of claim 13, further comprising determining the information bits based on jointly detecting the sequences.

### Claim 20

A transmitting device for wireless communication comprising:
a memory, and
one or more processors operatively coupled to the memory, the memory and the one or more processors configured:
to add parity check bits to a set of information bits;
to generate a non-coherent transmission signal by mapping the parity check bits and the set of information bits into a sequence of complex symbols; and
to transmit the non-coherent transmission signal to a receiving device.

### Claim 21 (depends on 20)

The transmitting device of claim 20, in which the parity check bits comprise cyclic redundancy check (CRC) bits.

### Claim 22 (depends on 21)

The transmitting device of claim 21, in which the parity check bits further comprise additional parity check bits based on the set of information bits and/or the CRC bits.

### Claim 23 (depends on 20)

The transmitting device of claim 20, in which the one or more processors are further configured:
to segment the set of information bits and the parity check bits into a plurality of segments comprising subsets of information plus parity bits; and
to map each subset to a respective sequence of a plurality of sequences for the non-coherent transmission signal, each sequence comprising n complex symbols.

### Claim 24 (depends on 23)

The transmitting device of claim 23, in which the parity check bits comprise cyclic redundancy check (CRC) bits and additional parity check bits that are based on at least two different subsets of the set of information plus parity bits and/or at least two different subsets of the CRC bits.

### Claim 25 (depends on 23)

The transmitting device of claim 23, in which the plurality of sequences are concatenated to form the sequence of complex symbols to form the non-coherent transmission signal.

### Claim 26 (depends on 23)

The transmitting device of claim 23, in which the plurality of sequences are super-positioned to form the sequence of complex symbols to form the non-coherent transmission signal.

### Claim 27 (depends on 20)

The transmitting device of claim 20, in which the parity check bits comprise a first quantity of cyclic redundancy check (CRC) bits when a payload corresponding to the set of information bits is smaller than a threshold and the parity check bits comprise a second quantity of bits when the payload corresponding to the set of information bits is greater than the threshold.

### Claim 28 (depends on 20)

The transmitting device of claim 20, in which the parity check bits comprise a first quantity of cyclic redundancy check (CRC) bits and a second quantity of additional parity check bits when a payload corresponding to the set of information bits is smaller than a threshold, and the parity check bits comprise a third quantity of CRC bits a fourth quantity of additional parity check bits when the payload corresponding to the set of information bits is greater than the threshold.

### Claim 29 (depends on 20)

The transmitting device of claim 20, in which the one or more processors are further configured to determine a quantity of parity check bits based on a quantity of segments into which the set of information bits are partitioned.

### Claim 30

A receiving device for wireless communication comprising:
a memory, and
one or more processors operatively coupled to the memory, the memory and the one or more processors configured:
to receive, from a transmitting device, a non-coherent signal having at least one segment, each segment comprising a sequence of complex symbols corresponding to information bits and parity check bits; and
to jointly detect the sequences from each segment of the received non-coherent signal by using the parity check bits.