TONE INTERLEAVING METHODS FOR MULTI-BANDS AND WIDE BANDWIDTH TRANSMISSIONS IN WLAN

• US 20200136756A1
• Filed: 09/27/2019
• Published: 04/30/2020
• Est. Priority Date: 10/25/2018
• Status: Active Grant

• Current Assignee: MediaTek Singapore Pte. Ltd. (MediaTek, Inc.)
• Original Assignee: MediaTek Singapore Pte. Ltd. (MediaTek, Inc.)
• Inventors: LIU, Jianhan, HU, Shengquan
• Granted Patent: US 11,677,499 B2
• Time in Patent Office: Days
• CPC Class Codes: H03M 13/255 with Low Density Parity Check [LDPC] codes
• CPC Class Codes: H03M 13/276 Interleaving address generation
• CPC Class Codes: H04L 1/0063 Single parity check
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

Embodiments of the present invention provide a method and apparatus for tone interleaving wide channel bandwidths or transmissions using multiple-bands. Embodiments of the present invention are designed to accommodate new generations of WLAN. According to some embodiments, existing communication standards of the current generations of WLAN are used to simplify the implementation of the tone mapping schemes described herein. For example, some embodiments of the present invention use an 80 MHz channel bandwidth with resource units having 996 tones as a building block to efficiently implement new tone mapping and interleaving schemes for wider bandwidth channels.

Claims

1. A method of tone mapping for WLAN transmissions, the method comprising:

dividing a wireless channel into a plurality of subcarriers, wherein the wireless channel comprises a wireless bandwidth of 320 MHz, wherein the wireless channel is operable to carry WLAN transmissions comprising codewords, and the codewords comprise a plurality of complex constellation points; and

mapping each complex constellation point of the codewords of the WLAN transmissions to tones of subcarriers of the plurality of subcarriers, wherein consecutive complex constellation points of codewords are mapped to nonadjacent tones of a respective subcarrier by;

a) mapping a first complex constellation point of the codewords to a first tone of a first subcarrier of the plurality of subcarriers;

b) mapping a second complex constellation point of the codewords to a second value of the first subcarrier;

c) mapping a third complex constellation point of the codewords to a third value of the first subcarrier;

d) mapping a fourth complex constellation point of the codewords to a fourth value of the first subcarrier;

e) repeating steps a)-d) for each subcarrier of the plurality of subcarriers; and

f) repeating step e) until all tones of the plurality of subcarriers have been mapped.

2. The method as described in claim 1, wherein said mapping further comprises mapping each complex constellation point using a tone mapping distance parameter of 20.

3. The method as described in claim 1, wherein said subcarriers comprise a channel bandwidth of 80 MHz and wherein said mapping is performed according to an IEEE 802.11ax tone plan.

4. The method as described in claim 1, wherein said mapping is performed using 160 MHz or 80+80 MHz tone interleavers, and wherein a distance parameter of 20 is used for said 160 MHz tone interleaver.

5. The method as described in claim 1, wherein said mapping reduces an error rate of the transmission caused by burst errors.

6. A method of tone mapping for WLAN transmissions, the method comprising:

dividing a wireless channel into a plurality of subcarriers, wherein the wireless channel comprises a wireless bandwidth of 240 MHz, wherein the wireless channel is operable to carry WLAN transmissions comprising codewords, wherein the codewords comprise a plurality of complex constellation points; and

mapping each complex constellation point of the codewords of the WLAN transmissions to tones of subcarriers of the plurality of subcarriers, wherein consecutive complex constellation points of codewords are mapped to nonadjacent tones of a respective subcarrier by;

a) mapping a first complex constellation point of the codewords to a first tone of a first subcarrier of the plurality of subcarriers;

b) mapping a second complex constellation point of the codewords to a second value of the first subcarrier;

c) mapping a third complex constellation point of the codewords to a third value of the first subcarrier;

e) repeating steps a)-c) for each subcarrier of the plurality of subcarriers; and

f) repeating step e) until all tones of the plurality of subcarriers have been mapped.

7. The method as described in claim 6, wherein said mapping further comprises mapping each complex constellation point using a tone mapping distance parameter of 20.

8. The method as described in claim 6, wherein said subcarriers comprise a channel bandwidth of 80 MHz and wherein said mapping is performed according to an IEEE 802.11ax tone plan.

9. The method as described in claim 6, wherein said subcarriers comprise 980 data tones.

10. The method as described in claim 6, wherein said dividing and said mapping are performed by a wireless access point.

11. The method as described in claim 6, wherein said dividing and said mapping are performed by a wireless station.

12. The method as described in claim 6, further comprising transmitting the WLAN transmissions using the tones mapped to the complex constellation points.

13. A method of tone mapping for WLAN transmissions, the method comprising:

determining a wireless channel bandwidth of a wireless channel, wherein the wireless channel is operable to carry WLAN transmissions comprising codewords, wherein the codewords comprise a plurality of complex constellation points;

dividing the wireless channel into a plurality of subcarriers; and

mapping each complex constellation point of the codewords of the WLAN transmissions to tones of subcarriers of the plurality of subcarriers, wherein consecutive complex constellation points of codewords are mapped to nonadjacent tones of a respective subcarrier until all tones of the respective subcarrier have been mapped.

14. The method as described in claim 13, wherein said mapping comprises mapping each complex constellation point using a tone mapping distance parameter of 20.

15. The method as described in claim 13, wherein said subcarriers comprise a channel bandwidth of 80 MHz.

16. The method as described in claim 13, wherein said wireless channel bandwidth equals 240 MHz and said plurality of subcarriers comprises three subcarriers.

17. The method as described in claim 13, wherein said wireless channel bandwidth equals 320 MHz and said plurality of subcarriers comprises four subcarriers.

18. The method as described in claim 13, wherein said subcarriers comprise 980 data tones.

19. The method as described in claim 13, wherein said mapping reduces an error rate of the transmission caused by burst errors.

20. The method as described in claim 13, further comprising transmitting the WLAN transmissions using the tones mapped to the complex constellation points.