Spectral masking for wideband wireless local area network transmissions

• US 10,355,956 B2
• Filed: 09/08/2016
• Issued: 07/16/2019
• Est. Priority Date: 10/30/2015
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Yang, Lin, Tian, Bin, Kim, Youhan
• Primary Examiner(s): Pasia, Redentor
• Application Number:
  US15/260,131
• Publication Number:
  US 20170126529A1
• Time in Patent Office: 1,041 Days
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 27/26025 Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking allocating sub-channels of the transmission path H04L5/003
• CPC Class Codes: H04L 43/0876 Network utilisation, e.g. volume of load or congestion level
• CPC Class Codes: H04L 43/18 Protocol analysers
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• 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]
• CPC Class Codes: H04W 88/02 Terminal devices

Abstract

Methods, systems, and devices are described for wireless communications. A wireless station includes a transmitter to generate a wideband contiguous waveform in a band. The transmitter transmits the waveform that conforms to spectral masking attributes and spectral flatness attributes. The wireless station, or another device supporting spectrum analysis functions, detects a wideband contiguous waveform and performs spectrum analysis of the waveform. The wireless station includes a resolution bandwidth of 25 KHz and a video bandwidth of 7.5 KHz.

Claims

1. A method for wireless communication, comprising:

generating, by a wireless communication device, a wideband contiguous waveform comprising a predefined band comprising a bandwidth (β

), a center frequency (fc), and a number of tones in the bandwidth (β

), the number of tones comprising 2,024 tones; and

transmitting the wideband contiguous waveform using a transmitter conforming to a spectral mask;

wherein the spectral mask comprises a 0 dBr bandwidth of 159 MHz, a −

20 dBr point at an 80.5 MHz frequency offset from the center frequency, a −

28 dBr point at a 160 MHz frequency offset from the center frequency, and a −

40 dBr point at 240 MHz frequency offset and higher from the center frequency.

2. The method of claim 1, wherein β

=160 MHz.

3. The method of claim 1, wherein a tone spacing of β

is a function of β

divided by the number of tones.

4. The method of claim 3, wherein the bandwidth (β

) comprises an inner region and an outer region, the inner region comprising subcarriers from −

696 to −

515, from −

509 to −

166, from +166 to +509, and from +515 to +696 from fc, and

the outer region comprising subcarriers from −

1012 to −

697, from −

165 to −

12, from +12 to +165, and from +697 to +1012 from fc.

5. The method of claim 1, wherein the spectral mask further comprises a first rolloff portion of 20 dBr/MHz between a 0 dBr bandwidth point at a 79.5 MHz frequency offset from the center frequency and the −

20 dBr point at the 80.5 MHz frequency offset from the center frequency.

6. The method of claim 1, wherein transmitting the wideband contiguous waveform comprises:

transmitting a 160 MHz packet layer convergence protocol (PLCP) protocol data unit (PPDU) of a high efficiency (HE) format using the transmitter conforming to the spectral mask.

7. A method for wireless communication, comprising:

generating, by a wireless communication device, a wideband contiguous waveform comprising a predefined band comprising a bandwidth (β

), a center frequency (fc), and a number of tones in the bandwidth (β

), the number of tones comprising 2,024 tones; and

transmitting the wideband contiguous waveform using a transmitter conforming to a spectral mask;

wherein the spectral mask comprises a 0 dBr bandwidth of 159 MHz, a −

20 dBr point at an 80.5 MHz frequency offset from the center frequency, a −

28 dBr point at a 120 MHz frequency offset from the center frequency, and a −

40 dBr point at a 160 MHz frequency offset and higher from the center frequency.

8. The method of claim 7, wherein β

=160 MHz.

9. A method for wireless communication, comprising:

generating, by a wireless communication device, a wideband contiguous waveform comprising a predefined band comprising a bandwidth (β

), a center frequency (fc), and a number of tones in the bandwidth (β

), the number of tones comprising 2,024 tones; and

transmitting the wideband contiguous waveform using a transmitter conforming to a spectral mask;

wherein the spectral mask comprises a 0 dBr bandwidth of 159 MHz, a −

20 dBr point at an 80.5 MHz frequency offset from the center frequency, a −

34 dBr point at a 160 MHz frequency offset from the center frequency, and a −

40 dBr point at a 240 MHz frequency offset and higher from the center frequency.

10. The method of claim 9, wherein β

=160 MHz.

11. An apparatus for wireless communication, comprising:

a wireless communication device to generate a wideband contiguous waveform comprising a predefined band comprising a bandwidth (β

), a center frequency (fc), and a number of tones in the bandwidth (β

), the number of tones comprising 2,024 tones;

a transmitter to transmit the wideband contiguous waveform conforming to a spectral mask;

wherein the spectral mask comprises a 0 dBr bandwidth of 159 MHz, a −

20 dBr point at an 80.5 MHz frequency offset from the center frequency, a −

28 dBr point at a 160 MHz frequency offset from the center frequency, and a −

40 dBr point at 240 MHz frequency offset and higher from the center frequency.

12. The apparatus of claim 11, wherein β

=160 MHz.

13. The apparatus of claim 11, wherein a tone spacing of β

is a function of β

divided by the number of tones.

14. The method of claim 13, wherein the bandwidth (β

) comprises an inner region and an outer region, the inner region comprising subcarriers from −

696 to −

515, from −

509 to −

166, from +166 to +509, and from +515 to +696 from fc, and

the outer region comprising subcarriers from −

1012 to −

697, from −

165 to −

12, from +12 to +165, and from +697 to +1012 from fc.

15. The apparatus of claim 11, wherein the spectral mask comprises a first rolloff portion of 20 dBr/MHz between a 0 dBr bandwidth point at a 79.5 MHz frequency offset from the center frequency and the −

20 dBr point at the 80.5 MHz frequency offset from the center frequency.

16. The apparatus of claim 11, wherein the transmitter to transmit the wideband contiguous waveform comprises:

the transmitter to transmit a 160 MHz packet layer convergence protocol (PLCP) protocol data unit (PPDU) of a high efficiency (HE) format conforming to the spectral mask.

17. An apparatus for wireless communication, comprising:

a wireless communication device to generate a wideband contiguous waveform comprising a predefined band comprising a bandwidth (β

), a center frequency (fc), and a number of tones in the bandwidth (β

), the number of tones comprising 2,024 tones; and

a transmitter to transmit the wideband contiguous waveform conforming to a spectral mask;

wherein the spectral mask comprises a 0 dBr bandwidth of 159 MHz, a −

20 dBr point at an 80.5 MHz frequency offset from the center frequency, a −

28 dBr point at a 120 MHz frequency offset from the center frequency, and a −

40 dBr point at a 160 MHz frequency offset and higher from the center frequency.

18. The apparatus of claim 17, wherein β

=160 MHz.

19. An apparatus for wireless communication, comprising:

a wireless communication device to generate a wideband contiguous waveform comprising a predefined band comprising a bandwidth (β

), a center frequency (fc), and a number of tones in the bandwidth (β

), the number of tones comprising 2,024 tones; and

a transmitter to transmit the wideband contiguous waveform conforming to a spectral mask;

wherein the spectral mask comprises a 0 dBr bandwidth of 159 MHz, a −

20 dBr point at an 80.5 MHz frequency offset from the center frequency, a −

34 dBr point at a 160 MHz frequency offset from the center frequency, and a −

40 dBr point at a 240 MHz frequency offset and higher from the center frequency.

20. The apparatus of claim 19, wherein β

=160 MHz.