Transmitting a wireless signal based on detected signal interference

• US 9,001,927 B2
• Filed: 01/31/2013
• Issued: 04/07/2015
• Est. Priority Date: 01/31/2013
• Status: Active Grant

• Current Assignee: Hewlett Packard Enterprise Development LP (Hewlett-Packard Enterprise Company)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Chai, Eugene, Lee, Jung Gun, Lee, Sung-Ju, Etkin, Raul Hernan, Shin, Kang
• Primary Examiner(s): Phillips, Hassan
• Assistant Examiner(s): GEORGE, AYANAH S
• Application Number:
  US13/755,694
• Publication Number:
  US 20140211883A1
• Time in Patent Office: 796 Days
• Field of Search: None
• US Class Current: 375/296
• CPC Class Codes: H04J 11/0023 Interference mitigation or co-ordination direct sequence spread spectrum [DSSS] systems H04B1/7097; frequency hopping H04B1/713; allocation criteria for ingress interference avoidance H04L5/0062; frequency allocation criteria for requirements on out-of-channel emissions H04L5/0066; arrangements for removing intersymbol interference or baseband equalisers H04L25/03006; peak power aspects in multicarrier modulation H04L27/2614; power management H04W52/00; traffic scheduling H04W72/54, H04W72/541
• CPC Class Codes: H04L 1/0034 where the transmitter decides based on inferences, e.g. use of implicit signalling
• CPC Class Codes: H04L 27/0006 Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio for spectrum sharing between different networks H04W16/14
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0041 Frequency-non-contiguous
• CPC Class Codes: H04L 5/0064 Rate requirement of the data, e.g. scalable bandwidth, data priority
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided
• CPC Class Codes: H04W 72/542 using measured or perceived quality

Abstract

A computing device can determine a radio frequency (RF) bandwidth in which one or more frames are to be transmitted by the computing device. The RF bandwidth is within the operating transmission bandwidth of the computing device. A signal interference having an interference bandwidth can interfere with the transmission of the one or more frames. In response to detecting the signal interference, one or more frames can be transmitted within the operating transmission bandwidth and not within the interference bandwidth.

Claims

1. A method for transmitting a wireless signal from a computing device, the method comprising:

determining a radio frequency (RF) bandwidth in which a plurality of frames are to be transmitted by the computing device, the RF bandwidth being within an operating transmission bandwidth;

detecting a signal interference that can interfere with transmission of the plurality of frames, the signal interference having an interference bandwidth that is within the RF bandwidth;

in response to detecting the signal interference, transmitting a first data frame of the plurality of data frames as a first shaped data frame comprising a first set of sub-bands within the operating transmission bandwidth and not within the interference bandwidth, wherein the first set of sub-bands comprises discontiguous sub-bands; and

in response to detecting a change in the signal interference or detecting additional signal interference, transmitting a second subsequent data frame of the plurality of data frames as a second shaped data frame comprising a second set of sub-bands within the operating transmission bandwidth and not within the interference bandwidth, wherein the second set of sub-bands comprises discontiguous sub-bands, the first set and the second set being different.

2. The method of claim 1, wherein detecting the signal interference includes monitoring for interference using a receiving antenna of the computing device.

3. The method of claim 1, wherein transmitting the first data frame includes processing the first data frame to generate the first shaped data frame, wherein processing the first data frame includes (i) copying a signal stream of the first data frame, and (ii) modulating the signal stream and the copy of the signal stream to align with a low-pass filter.

4. The method of claim 3, wherein processing the first data frame includes applying a low-pass filter to each of the modulated signal stream and the modulated copy of the signal stream.

5. The method of claim 4, wherein processing the first data frame includes (i) modulating the filtered signal stream and the filtered copy of the signal stream to create two sub-bands within the operating transmission bandwidth but not within the interference bandwidth, and (ii) combining the two sub-bands to generate the first shaped data frame.

6. The method of claim 4, wherein the low-pass filters are selected to divide a spectrum of the first data frame into one or more sub-bands with partially overlapping spectrum.

7. The method of claim 1, further comprising:

generating a preamble to transmit with the first data frame to provide frequency information about the first data frame to a receiving device.

8. A computing device comprising:

a radio module to provide a radio frequency signal;

two or more antennas including a transmission antenna and a receiving antenna; and

programmable hardware coupled to the radio module and the two or more antennas, the programmable hardware to implement;

a frequency manager to (i) detect, via the receiving antenna, a signal interference that can interfere with transmission of a data frame, the signal interference having an interference bandwidth, and (ii) determine that the interference bandwidth is within a radio frequency (RF) bandwidth in which the data frame is to be transmitted, the RF bandwidth being within an operating transmission bandwidth;

a frequency shaper to process the data frame to generate a shaped data frame, the shaped data frame comprising discontiguous frequency sub-bands within the operating transmission bandwidth and not within the interference bandwidth; and

a transmitting module to transmit the shaped data frame via the transmission antenna.

9. The computing device of claim 8, wherein the frequency shaper processes the data frame by (i) copying a signal stream of the data frame, (ii) modulating each of the signal stream and the copy of the signal stream to align with a low-pass filter, (iii) applying a low-pass filter to each of the modulated signal stream and the modulated copy of the signal stream, (iv) modulating the filtered signal stream and the filtered copy of the signal stream to create two sub-bands within the operating transmission bandwidth but not within the interference bandwidth, and (v) combining the two sub-bands to generate a shaped data frame.

10. The computing device of claim 8, wherein the transmitting module generates a preamble to transmit with the shaped data frame to provide frequency information about the shaped data frame to a receiving device.

11. The computing device of claim 10, wherein the preamble is transmitted in a frequency bandwidth that is equal to a frequency bandwidth the shaped data frame is to be transmitted so that the preamble is transmitted within the operating transmission bandwidth but not within the interference bandwidth.

12. The computing device of claim 8, wherein the programmable hardware implements a receiving module to receive a preamble and a data frame transmitted from another computing device.

13. A method for transmitting a wireless signal from a computing device, the method comprising:

determining a radio frequency (RF) bandwidth in which a data frame is to be transmitted by the computing device, the RF bandwidth being within an operating transmission bandwidth;

detecting a signal interference that can interfere with transmission of the data frame, the signal interference having an interference bandwidth that is within the RF bandwidth;

in response to detecting the signal interference, transmitting the data frame as a shafted data frame comprising a set of sub-bands within the operating transmission bandwidth and not within the interference bandwidth, wherein the set of sub-bands comprises discontiguous sub-bands.