Data processing method and equipment

Abstract

Embodiments of the present invention provide a data processing method and apparatus for scrambling the bit sequence of a user's bitstream to which multiple resource units (RUs) are allocated, using one interleaver or one low-density parity check code (LDPC) tone mapper. [Solution] A data processing method in a wireless local area network (WLAN) system, comprising the steps of: performing channel coding on bits using an encoder; assigning coded bitstreams output by the encoder to different spatial streams using a stream parser; and rearranging spatial streams to be assigned to M RUs output by the stream parser using a first tone mapper.

Claims

1. A data processing method in a wireless local area network (WLAN) system, The encoder performs channel coding on the bits, The steps include: performing stream parsing on the coded bitstream output by the encoder using a stream parser; A step of rearranging the spatial stream output by the stream parser using a first tone mapper, wherein the spatial stream output by the stream parser is assigned to M RUs, A method that includes this.

2. The value of the number of data subcarriers in the first tone mapper is any positive integer within [NSD_min / Q, NSD_max / Q], The method according to claim 1, wherein NSD_min is the sum of the data subcarriers contained in all M RUs, NSD_max is the sum of the number of subcarriers contained in all M RUs, and Q is the number of data subcarriers to which one data bit is mapped.

3. The method according to claim 1 or 2, wherein the tone mapping distance parameter DTM of the first tone mapper is a common divisor of NSD, where NSD is the number of data subcarriers of the first tone mapper.

4. The aforementioned method, The following method: Method 1: A positive integer is selected as DTM from [DTM_min, DTM_max], where DTM_min is the tone mapping distance parameter corresponding to the second tone mapper corresponding to the RU closest to the NSD, where the number of included data subcarriers is less than the NSD, and DTM_max is the tone mapping distance parameter corresponding to the third tone mapper corresponding to the RU closest to the NSD, where the number of included data subcarriers is greater than the NSD. Method 2: A positive integer that minimizes the PER at the receiving end, or, when the PER at the receiving end is a preset value, a positive integer that minimizes the SNR, is selected as the DTM from [DTM_min, DTM_max]. Method 3: The ratio of NSD to NCOL of a first interleaver having the same RU size as the first tone mapper, NSD / NCOL, is used as the DTM. One of the following is the step to decide on DTM, The method according to any one of claims 1 to 3, further comprising:

5. The aforementioned M RUs include one 26-tone RU and one 52-tone RU. When dual-carrier modulation mode is not used, NSD=72, DTM is 4 or 6, or The method according to any one of claims 1 to 4, wherein when the dual-carrier modulation mode is used, NSD = 36 and DTM is 2 or 3.

6. The M RUs include one 26-tone RU and one 106-tone RU. When dual-carrier modulation mode is not used, the NSD is 126 or 128, or The method according to any one of claims 1 to 4, wherein when the dual-carrier modulation mode is used, the NSD is 63 or 64.

7. The M RUs are M 242-tone RUs, When M=2, if dual-carrier modulation mode is not used, NSD is 468 and DTM is 12; if dual-carrier modulation mode is used, NSD is 234 and DTM is 9. When M=3, if dual-carrier modulation mode is not used, NSD is 702 and DTM is 13 or 18; if the dual-carrier modulation mode is used, NSD is 351 and DTM is 9 or 13, or When M=4, if dual-carrier modulation mode is not used, NSD is 980 and DTM is 20; if dual-carrier modulation mode is used, NSD is 490 and DTM is 14. The method according to any one of claims 1 to 4.

8. A data processing method in a wireless local area network (WLAN) system, The encoder performs channel coding on the bits, The steps include: performing stream parsing on the coded bitstream output by the encoder using a stream parser; A first interleaver rearranges the spatial stream output by the stream parser, wherein the spatial stream output by the stream parser is assigned to M RUs. A method that includes this.

9. The number of data subcarriers NSD in the first interleaver is a positive integer within [NSD_min / Q, NSD_max / Q], The method according to claim 8, wherein NSD_min is the sum of the data subcarriers contained in the M RUs, NSD_max is the sum of the subcarriers contained in the M RUs, and Q is the number of data subcarriers to which one data bit is mapped.

10. The method according to claim 8 or 9, wherein the number of columns NCOL and the number of rows NROW of the first interleaver satisfy: (NCOL × NROW) / NBPSCS = NSD, where NBPSCS is the number of coded bits carried by each subcarrier of each spatial stream.

11. The method according to any one of claims 8 to 10, wherein the frequency rotation parameter NROT of the first interleaver is determined based on the following equation: NROT = floor(NSD / 4), where floor() represents the floor function.

12. The aforementioned M RUs include one 26-tone RU and one 52-tone RU. The method according to any one of claims 8 to 11, wherein when dual-carrier modulation mode is not used, NSD = 72, NCOL = 18, NROW = 4 × NBPSCS, and NROT = 18.

13. The M RUs include one 26-tone RU and one 106-tone RU. When dual-carrier modulation mode is not used, NSD is 126, NROT is 31, or The method according to any one of claims 8 to 11, wherein the NSD is 63 when the dual-carrier modulation mode is used.

14. A device comprising an encoder, a stream parser, and a first tone mapper, which performs the method according to any one of claims 1 to 7.

15. A device comprising an encoder, a stream parser, and a first interleaver, which performs the method according to any one of claims 8 to 13.

16. A program that causes a computer to perform the method described in any one of claims 1 to 7.

17. A program that causes a computer to perform the method described in any one of claims 8 to 13.

18. A computer-readable recording medium on which a program is recorded, wherein when the program is executed, the computer can perform the method according to any one of claims 1 to 7.

19. A computer-readable recording medium on which a program is recorded, wherein when the program is executed, a computer can perform the method described in any one of claims 8 to 13.

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