OFDM transmission and reception for non-OFDM signals

• US 9,363,120 B2
• Filed: 04/18/2014
• Issued: 06/07/2016
• Est. Priority Date: 05/08/2007
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Inventors: Hassan, Amer A., Huitema, Christian
• Primary Examiner(s): HA, DAC V
• Application Number:
  US14/256,709
• Publication Number:
  US 20140211872A1
• Time in Patent Office: 781 Days
• Field of Search: 375/260, 375/267, 375/285, 375/340, 375/346, 375/347, 375/349, 370/203, 370/208, 370/319, 370/344, 370/437, 370/441, 370/442, 370/464, 370/465, 370/480, 370/482, 370/487, 370/490
• US Class Current: 1/1
• CPC Class Codes: H04B 1/0003 Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain digital baseband systems H04L25/00; digital modulation/demodulation H04L27/00; CDMA H04B1/707; TDMA H04B7/2643; image transmission H04N5/00
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04L 27/2647 Arrangements specific to the receiver only equalisation H04L27/01
• CPC Class Codes: H04L 27/26524 Fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators in combination with other circuits for demodulation
• CPC Class Codes: H04L 69/12 Protocol engines
• CPC Class Codes: H04L 69/18 Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

Methods and apparatuses for Orthogonal Frequency-Division Multiplexing (OFDM) communication of non-OFDM radio signals are disclosed. The non-OFDM radio signals are force-modulated into OFDM signals. In one example, a non-OFDM signal is received and is processed into an OFDM signal to produce a created OFDM signal. An actual OFDM signal is also received and is processed together with the created OFDM signal.

Claims

1. A method performed on a computing device that includes at least one processor, memory, a demodulator, and radio hardware, the method comprising:

receiving, via the radio hardware, a non-Orthogonal Frequency-Division Multiplexing (“

OFDM”

) radio signal and an actual OFDM radio signal, where the received actual OFDM radio signal is channelized over a first plurality of subchannels of an available channel bandwidth;

processing, by the at least one computing device, the received non-OFDM radio signal into a created OFDM radio signal that is channelized over a second plurality of subchannels of the available channel bandwidth;

demodulating, via the demodulator, the created OFDM radio signal along with the received actual OFDM radio signal, where a width of each of the first and second pluralities of subchannels is based on the non-OFDM radio signal.

2. The method of claim 1 where the processing is based on force-modulation of the non-OFDM radio signal.

3. The method of claim 1 where the non-OFDM radio signal is a Bluetooth signal.

4. The method of claim where the processing is performed at least in part by a Software Defined Radio (“

SDR”

) implemented on the computing device.

5. The method of claim further comprising processing the created OFDM radio signal as an original OFDM radio signal.

6. The method of claim further comprising processing the received actual OFDM radio signal together with the created OFDM radio signal.

7. The method of claim further comprising receiving the non-OFDM radio signal along with the received actual OFDM radio signal.

8. A computing device comprising:

radio hardware via which the computing device receives a non-Orthogonal Frequency-Division Multiplexing (“

OFDM”

) radio signal and an actual OFDM radio signal, where the received actual OFDM radio signal is channelized over a first plurality of subchannels of an available channel bandwidth;

at least one processor via which the computing device processes the received non-OFDM radio signal into a created OFDM radio signal that is channelized over a second plurality of subchannels of the available channel bandwidth; and

a demodulator via which the computing device demodulates the created OFDM radio signal along with the received actual OFDM radio signal, where a width of each of the first and second pluralities of subchannels is based on the non-OFDM radio signal.

9. The computing device of claim 8 where the non-OFDM radio signal is processed based on force-modulation of the non-OFDM radio signal.

10. The computing device of claim 8 where the non-OFDM radio signal is a Bluetooth signal.

11. The computing device of claim 8 where the non-OFDM radio signal is processed at least in part by a Software Defined Radio (“

SDR”

) implemented on the computing device.

12. The computing device of claim 8, the at least one processor via which the computing device further processes the created OFDM radio signal as an original OFDM radio signal.

13. The computing device of claim 8, the at least one processor via which the computing device further processes the received actual OFDM radio signal together with the created OFDM radio signal.

14. The computing device of claim 8, the radio hardware via which the computing device further receives the non-OFDM radio signal along with the received actual OFDM radio signal.

15. At least one memory that comprises computer-readable instructions that, based on execution by a computing device that includes at least one processor, memory, a demodulator, and radio hardware, configure the computing device to:

receive, via the radio hardware, a non-Orthogonal Frequency-Division Multiplexing (“

OFDM”

) radio signal and an actual OFDM radio signal, where the received actual OFDM radio signal is channelized over a first plurality of subchannels of an available channel bandwidth;

process, via the at least one processor, the non-ODFM radio signal into a created OFDM radio signal that is channelized over a second plurality of subchannels of the available channel bandwidth; and

demodulate, via the demodulator, the created OFDM radio signal along with the received actual OFDM radio signal, where a width of each of the first and second pluralities of subchannels is based on the non-OFDM radio signal.

16. The at least one memory of claim 15 where the non-OFDM radio signal is processed based on force-modulation of the non-OFDM radio signal.

17. The at least one memory of claim 15 where the non-OFDM radio signal is a Bluetooth signal.

18. The at least one memory of claim 15 where the non-OFDM radio signal is processed at least in part by a Software Defined Radio (“

SDR”

) implemented on the computing device.

19. The at least one memory of claim 15 where the computer-readable instructions further configure the computing device to process the created OFDM radio signal as an original OFDM radio signal.

20. The at least one memory of claim 15 where the computer-readable instructions further cause the computing device to:

receive the non-OFDM radio signal along with the actual OFDM radio signal;

or process the received actual OFDM radio signal together with the created OFDM radio signal.