Wireless communication device using adaptive beamforming

• US 7,904,117 B2
• Filed: 08/12/2005
• Issued: 03/08/2011
• Est. Priority Date: 08/12/2005
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: SiBEAM, Inc. (Lattice Semiconductor Corporation)
• Inventors: Shung, Chuen-Shen, Williams, Tim Arthur, Marshall, John, Poon, Ada Shuk Yan, Doan, Chinh H., Gilbert, Jeffrey M., Emami-Neyestanak, Sohrab, Brodersen, Robert W.
• Primary Examiner(s): Corsaro; Nick
• Assistant Examiner(s): Ho; Huy C
• Application Number:
  US11/202,995
• Publication Number:
  US 20070037528A1
• Time in Patent Office: 2,034 Days
• Field of Search: 455/562.1, 455/550.1, 455/556.1, 455/575.7, 370/468, 342/374
• US Class Current: 455/562.1
• CPC Class Codes: H04B 7/0615 of weighted versions of same signal
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/0619 using feedback from receiving side feedback signaling for adaptive modulation/coding H04L1/0001

Abstract

A method and apparatus is disclosed herein for wireless communication with adaptive beamforming. In one embodiment, the apparatus comprises a processor, a radio frequency (RF) transmitter having a digitally controlled phased array antenna coupled to and controlled by the processor to transmit content using adaptive beamforming, and an interface to a wireless communication channel coupled to the processor to communicate antenna information relating to the use of the phased array antenna and to communicate information to facilitate playing the content at another location.

Claims

1. An apparatus comprising:

a processor;

a radio frequency (RF) transmitter having a digitally controlled phased array antenna coupled to and controlled by the processor to transmit content using adaptive beamforming over a first wireless communication channel to a receiver of the content; and

an interface to a second wireless communication channel coupled to the processor to communicate antenna information relating to the use of the phased array antenna to enable the processor to select a direction for the phased array antenna of the RF transmitter based on antenna location information of a phased array antenna of the receiver and performance information corresponding to the antenna location of the phased array antenna of the receiver, and to communicate information to facilitate playing the content, being wirelessly transferred on the first communication channel, at another location, including content protection information transmitted from the processor to the receiver through the second wireless communication channel, wherein the processor receives from the receiver through the interface to the second wireless communication channel an indication of the status of the first communication channel when the phased array antenna is operating in a mode during which the content may be transferred, and wherein the indication of the status comprises an indication from the receiver that prompts the processor to steer the beam of the digitally controlled phased array antenna in another direction in response to interference with transmission of portions of the content; and

wherein the content protection information comprises one or more of encryption keys sent by the processor and one or more acknowledgments sent from a receiver of one or more encryption keys from the processor.

2. The apparatus defined in claim 1 wherein the processor receives information via the interface to the second wireless communication channel when the phased array antenna of the RF transmitter is being initialized to enable the processor to select a direction to steer a beam formed by the phased array antenna of the RF transmitter.

3. The apparatus defined in claim 2 wherein the information to enable the processor to select a direction to steer the beam formed by the phased array antenna of the RF transmitter comprises antenna location information of the phased array antenna of the receiver and performance information corresponding to the antenna location.

4. The apparatus defined in claim 3 wherein the antenna location information and the performance information comprises one or more pairs that include an antenna position of the phased array antenna of the receiver and the signal strength of the channel for that antenna position.

5. The apparatus defined in claim 2 wherein the information to enable the processor to select a direction to steer the beam formed by the phased array antenna of the RF transmitter comprises information identifying one or more channels to be used by the processor.

6. The apparatus defined in claim 1 wherein the indication to prompt the processor to steer the beam in another direction includes information specifying one or more alternative channels.

7. The apparatus defined in claim 1 wherein the antenna information comprises information specifying one or more characteristics of a receiver to receive the content.

8. The apparatus defined in claim 1 wherein the second wireless communication channel is bi-directional.

9. The apparatus defined in claim 1 wherein the antenna information comprises information sent by the processor to specify a location to which a receiver designated to receive the content is to direct itself.

10. The apparatus defined in claim 9 wherein the location specifying the location indicates the receiver it to direct itself to the next location in a predetermined location order.

11. The apparatus defined in claim 1 wherein the antenna information indicates the quality of one or more channels and an indication from a receiver of the content to the processor to steer the beam to a different location.

12. The apparatus defined in claim 1 wherein the processor sends digital control information to the phased array antenna to indicate an amount to shift one or more phase shifters in the phased array antenna.

13. The apparatus defined in claim 12 wherein the digital control information comprises a set of coefficients.

14. The apparatus defined in claim 1 wherein the processor comprises a digital signal processor.

15. The apparatus defined in claim 1 wherein the processor generates baseband signals.

16. The apparatus defined in claim 15 wherein the baseband signals are orthogonal frequency division multiplex (OFDM) signals.

17. The apparatus defined in claim 1 further comprising:

a digital-to-analog converter to convert baseband signals into analog signals at a first frequency; and

a mixer to mix the analog signals with a signal from a local oscillator to produce adjusted analog signals with a second frequency higher than first frequency, the adjusted analog signals being sent to the phased array antenna for transmission thereby.

18. The apparatus defined in claim 17 wherein the phased array antenna comprises:

a demultiplexer coupled to receive the adjusted analog signals;

a plurality of phase shifters coupled to the demultiplexer to shift the phase of the adjusted analog signals based on control signals from the processor;

a plurality of amplifiers, wherein each of the plurality of amplifiers is coupled to an output of one of plurality of phase shifters; and

a plurality of antennas, wherein each of the plurality of antennas is coupled to an output of one of plurality of amplifiers.

19. The apparatus defined in claim 1 wherein the content adheres to the HDMI standard.

20. The apparatus defined in claim 1 wherein the content adheres to the DVI standard.

21. The apparatus defined in claim 1 wherein the transmitter is part of a transceiver.

22. An apparatus comprising:

a processor;

a radio frequency (RF) receiver having a digitally controlled phased array antenna coupled to and controlled by the processor to receive content from a transmitter using adaptive beamforming over a first wireless communication channel to a transmitter of the content; and

an interface to a second wireless communication channel coupled to the processor to communicate antenna information related to use of the phased array antenna to enable the transmitter to select a direction for a phased array antenna of the transmitter based on the antenna location information of the phased array antenna of the receiver and performance information corresponding to the antenna location of the phased array antenna of the receiver, and to communicate information to facilitate playing the content received from the transmitter over the first communication channel, including content protection information received by the receiver over the second wireless communication channel, wherein the processor sends an indication of the status of the first communication channel being received by the phased array antenna via the interface when the phased array antenna is operating in a mode during which content may be transferred, and wherein the indication from of the status comprises an indication from the receiver that prompts the transmitter to steer the beam of the phased array antenna of the transmitter in another direction in response to interference with transmission of portions of the content; and

wherein the content protection information comprises one or more of encryption keys sent by the processor and one or more acknowledgments sent from a receiver of one or more encryption keys from the processor.

23. The apparatus defined in claim 22 wherein the processor sends information via the second wireless communication channel interface when the phased array antenna of the RF receiver is being initialized to enable the transmitter to select a direction to steer a beam formed by its phased array antenna.

24. The apparatus defined in claim 23 wherein the information to enable the transmitter to select a direction to steer the beam formed by the phased array antenna comprises antenna location information of the phased array antenna of the receiver and performance information corresponding to the antenna location.

25. The apparatus defined in claim 24 wherein the antenna location information of the phased array antenna of the receiver and the performance information comprises one or more pairs that include an antenna position of the phased array antenna of the receiver and the signal strength of the channel for that antenna position.

26. The apparatus defined in claim 23 wherein the information to enable the transmitter to select a direction to steer the beam formed by the phased array antenna of the transmitter comprises information identifying one or more channels to be used by the transmitter.

27. The apparatus defined in claim 22 wherein the indication to prompt the transmitter to steer the beam in another direction includes information specifying one or more alternative channels.

28. The apparatus defined in claim 22 wherein the antenna information comprises information specifying one or more characteristics of a receiver.

29. The apparatus defined in claim 22 wherein the second wireless communication channel is bi-directional.

30. The apparatus defined in claim 22 wherein the antenna information comprises information sent by the processor to specify a location to which a receiver designated to receive the content is to direct itself.

31. The apparatus defined in claim 30 wherein the location specifying the location indicates the receiver it to direct itself to the next location in a predetermined location order.

32. The apparatus defined in claim 22 wherein the antenna information indicates the quality of one or more channels and an indication from a receiver of the content to the processor to steer the beam to a different location.

33. The apparatus defined in claim 22 wherein the processor sends digital control information to the phased array antenna to indicate an amount to shift one or more phase shifters in the phased array antenna.

34. The apparatus defined in claim 33 wherein the digital control information comprises a set of coefficients.

35. The apparatus defined in claim 22 wherein the processor comprises a digital signal processor.

36. The apparatus defined in claim 22 wherein signals from the phased array antenna are processed by the processor as baseband signals.

37. The apparatus defined in claim 36 wherein the baseband signals are orthogonal frequency division multiplex (OFDM) signals.

38. The apparatus defined in claim 22 further comprising:

an amplifier coupled to receive signals received by the phased array antenna;

a mixer to combine the analog signals with a signal from a local oscillator to produce adjusted analog signals a frequency lower than the frequency of the analog signals;

an analog-to-digital converter coupled to the mixer to convert the adjusted analog signals to digital signals that are processed by the processor.

39. The apparatus defined in claim 22 wherein the content adheres to the HDMI standard.

40. The apparatus defined in claim 22 wherein the content adheres to the DVI standard.

41. The apparatus defined in claim 22 wherein the receiver is part of a transceiver.

42. A peripheral comprising:

a receiver comprising

a processor,

a radio frequency (RF) receiver having a digitally controlled phased array antenna coupled to and controlled by the processor to receive content from a transmitter using adaptive beamforming, and

an interface to a second wireless communication channel coupled to the processor to communicate antenna information related to use of the phased array antenna to enable the transmitter to select a direction for a phased array antenna of the transmitter based on the antenna location information of the phased array antenna of the receiver and performance information corresponding to the antenna location of the phased array antenna of the receiver, and to communicate information to facilitate playing the content received from the transmitter over the first communication channel, including content protection information received by the receiver over the second wireless communication channel, wherein the processor sends an indication of the status of the first communication channel being received by the phased array antenna via the interface when the phased array antenna is operating in a mode during which content may be transferred, and wherein the indication from of the status comprises an indication from the receiver that prompts the transmitter to steer the beam of the phased array antenna of the transmitter in another direction in response to interference with transmission of portions of the content, and

wherein the content protection information comprises encryption keys sent by the processor and wherein the receiver sends, on the second wireless communication channel, one or more acknowledgments corresponding to one or more encryption keys from the processor;

a display screen;

a display controller coupled to receive the content and to cause the content to be displayed on the display screen.

43. A peripheral comprising:

a receiver comprising

a processor,

a radio frequency (RF) receiver having a digitally controlled phased array antenna coupled to and controlled by the processor to receive content from a transmitter using adaptive beamforming, and

an interface to a second wireless communication channel coupled to the processor to communicate antenna information related to use of the phased array antenna to enable the transmitter to select a direction for a phased array antenna of the transmitter based on the antenna location information of the phased array antenna of the receiver and performance information corresponding to the antenna location of the phased array antenna of the receiver, and to communicate information to facilitate playing the content received from the transmitter over the first communication channel, including content protection information received by the receiver over the second wireless communication channel, wherein the processor sends an indication of the status of the first communication channel being received by the phased array antenna via the interface when the phased array antenna is operating in a mode during which content may be transferred, and wherein the indication from of the status comprises an indication from the receiver that prompts the transmitter to steer the beam of the phased array antenna of the transmitter in another direction in response to interference with transmission of portions of the content, and

wherein the content protection information comprises encryption keys sent by the processor and wherein the receiver sends, on the second wireless communication channel, one or more acknowledgments corresponding to one or more encryption keys from the processor; and

a DVD device coupled to receive and play the content.