Reduction of time-domain correlation for secure sounding signal

Patent metadata

Field	Value
Publication number	US-2025168627-A1
Application number	US-202418885504-A
Country	US
Kind code	A1
Filing date	Sep 13, 2024
Priority date	Oct 15, 2020
Publication date	May 22, 2025
Grant date	—

Abstract

This disclosure describes systems, methods, and devices related to correlation reduction. A device may generate a sequence of pseudo-random symbols associated with a sounding signal to be transmitted to a first station device. The device may apply a modifier to the sequence of pseudo-random symbols. The device may generate a secure sounding signal from the modified sequence of pseudo-random symbols. The device may send the secure sounding signal to a first station device.

First claim

What is claimed is:

1 . A device, the device comprising processing circuitry coupled to storage, the processing circuitry configured to:
generate a sequence of pseudo-random symbols associated with a sounding signal to be transmitted to a first station device; apply a modifier to the sequence of pseudo-random symbols; generate a secure sounding signal from the modified sequence of pseudo-random symbols; and send the secure sounding signal to a first station device.

2 . The device of claim 1 , wherein the modifier is a time-domain filter.

3 . The device of claim 2 , wherein using the time-domain filter is linear filtering and not circular filtering.

4 . The device of claim 1 , wherein the modifier reduces time-domain correlation of the secure sounding signal for a given bandwidth.

5 . The device of claim 4 , wherein a reduction of time-domain correlation is based on a time-domain impulse response of the modifier having minimal or no direct current (DC) component.

6 . The device of claim 1 , wherein the modifier is a frequency-domain mask.

7 . The device of claim 5 , wherein a frequency-domain response of the modifier has smaller magnitudes at band edges than an average magnitude of the band.

8 . The device of claim 7 , wherein a magnitude of a frequency-domain response of the modifier comprises a peak or two peaks.

9 . The device of claim 1 , wherein a time-domain impulse response of the modifier comprises a main pulse or two opposite main pulses.

10 . The device of claim 8 , wherein a signal magnitude away from the main pulse quickly diminishes to minimal or zero.

11 . The device of claim 1 , wherein a sum of the sequence of pseudo-random symbols may equal zero for reducing a time-domain correlation of the secure sounding signal for a given bandwidth.

12 . A non-transitory computer-readable medium storing computer-executable instructions which when executed by one or more processors result in performing operations comprising:
generating a sequence of pseudo-random symbols associated with a sounding signal to be transmitted to a first station device; applying a modifier to the sequence of pseudo-random symbols; generating a secure sounding signal from the modified sequence of pseudo-random symbols; and sending the secure sounding signal to a first station device.

13 . The non-transitory computer-readable medium of claim 12 , wherein the modifier is a time-domain filter.

14 . The non-transitory computer-readable medium of claim 13 , wherein using the time-domain filter is linear filtering and not circular filtering.

15 . The non-transitory computer-readable medium of claim 12 , wherein the modifier reduces time-domain correlation of the secure sounding signal for a given bandwidth.

16 . The non-transitory computer-readable medium of claim 15 , wherein a reduction of time-domain correlation is based on a time-domain impulse response of the modifier having minimal or no direct current (DC) component.

17 . The non-transitory computer-readable medium of claim 12 , wherein the modifier is a frequency-domain mask.

18 . The non-transitory computer-readable medium of claim 16 , wherein a frequency-domain response of the modifier has smaller magnitudes at band edges than an average magnitude of the band.

19 . The non-transitory computer-readable medium of claim 18 , wherein a magnitude of a frequency-domain response of the modifier comprises a peak or two peaks.

20 . A method comprising:
generating a sequence of pseudo-random symbols associated with a sounding signal to be transmitted to a first station device; applying a modifier to the sequence of pseudo-random symbols; generating a secure sounding signal from the modified sequence of pseudo-random symbols; and sending the secure sounding signal to a first station device

Assignees

• Intel Corp

Inventors

• Li Qinghua
• Chen Xiaogang
• Lin Xintian
• Shor Gadi
• Stacey Robert
• Kojokaro Chen
• Segev Jonathan

Classifications

• H04L1/0008

  by supplementing frame payload, e.g. with padding bits · CPC title

• H04L27/2278

  using correlation techniques, e.g. for spread spectrum signals · CPC title

• H04L5/0048

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title

• H04W12/037 Primary

  of the control plane, e.g. signalling traffic · CPC title

• H04L27/2613 Primary

  Structure of the reference signals · CPC title