Beam management and antenna calibration in MIMO systems

Patent metadata

Field	Value
Publication number	US-12009875-B2
Application number	US-201917761940-A
Country	US
Kind code	B2
Filing date	Dec 27, 2019
Priority date	Dec 27, 2019
Publication date	Jun 11, 2024
Grant date	Jun 11, 2024

Abstract

Millimeter-wave (mmWave) and sub-mmWave technology, apparatuses, and methods that relate to transceivers and receivers for wireless communications are described. The various aspects include an apparatus of a communication device including an antenna array and processing circuitry coupled to the antenna array. The processing circuitry is configured to initialize a beam tracking algorithm based on received signals received at the antenna array, wherein antenna phases used in the beam tracking are bound by an upper phase limit and a lower phase limit, to generate a beam tracking result. The processing circuitry is further configured to generate a calibration vector based on the beam tracking result and receive subsequent transmissions using a codebook adapted based on the calibration vector.

First claim

What is claimed is:

1. An apparatus of a communication device, comprising:
an antenna array; and
baseband circuitry coupled to the antenna array and configured to:
perform a transmit sector sweep to determine a transmit direction;
perform a receive sector sweep based on the transmit direction;
using the transmit direction and a receiver direction associated with the receive sector sweep, measure a signal-to-noise ratio at a receiver; and
compute a power allocation for subsequent transmissions based on the signal-to-noise ratio, the subsequent transmissions based on a reduced channel matrix associated with the antenna array.

2. The apparatus of claim 1 , wherein the baseband circuitry is further configured to:
generate the reduced channel matrix based upon geometry of a transmit antenna array and a receive antenna array of the communication device.

3. The apparatus of claim 2 , wherein the baseband circuitry is further configured to:
generate an approximation of a full channel matrix based on the reduced channel matrix.

4. The apparatus of claim 2 , wherein the baseband circuitry is further configured to multiplex a plurality of data streams based on the reduced channel matrix.

5. The apparatus of claim 4 , wherein precoders for the multiplexing are Eigen vectors of a channel extracted from the reduced channel matrix.

6. The apparatus of claim 2 , wherein the reduced channel matrix is further based on a selected distance between the transmit antenna array and the receive antenna array.

7. The apparatus of claim 6 , wherein the baseband circuitry is further configured to estimate the distance based on the signal-to-noise ratio.

8. The apparatus of claim 1 , wherein computing the power allocation includes executing a water-filling algorithm.

9. The apparatus of claim 8 , wherein the water-filling is applied over multiplexed streams with an adaptive number of streams.

10. The apparatus of claim 9 , wherein the adaptive number of streams is based on the signal-to-noise ratio.

11. The apparatus of claim 1 , wherein power is equally allocated to active streams.

12. The apparatus of claim 11 , wherein a number of the active streams is determined based on the signal-to-noise ratio.

13. The apparatus of claim 1 , wherein the baseband circuitry is further configured to:
perform MIMO detection of multiple streams subsequent to receive sector sweeping.

14. A method comprising:
performing, at a baseband circuitry coupled to an antenna array of a communication device, a transmit sector sweep to determine a transmit direction;
performing a receive sector sweep based on the transmit direction;
using the transmit direction and a receiver direction associated with the receive sector sweep, measuring a signal-to-noise ratio at a receiver; and
computing a power allocation for subsequent transmissions based on the signal-to-noise ratio, the subsequent transmissions based on a reduced channel matrix associated with the antenna array.

15. The method of claim 14 , further comprising:
generating the reduced channel matrix based upon geometry of a transmit antenna array and a receive antenna array of the communication device.

16. The method of claim 15 , further comprising:
generating an approximation of a full channel matrix based on the reduced channel matrix.

17. The method of claim 15 , further comprising:
multiplexing a plurality of data streams based on the reduced channel matrix, wherein precoders for the multiplexing are Eigen vectors of a channel extracted from the reduced channel matrix.

18. The method of claim 15 , wherein the reduced channel matrix is further based on a selected distance between the transmit antenna array and the receive antenna array, and wherein the baseband circuitry is further configured to estimate the distance based on the signal-to-noise ratio.

19. The method of claim 14 , wherein computing the power allocation includes executing a water-filling algorithm, wherein the water-filling is applied over multiplexed streams with an adaptive number of streams, and wherein the adaptive number of streams is based on the signal-to-noise ratio.

20. The method of claim 14 , wherein power is equally allocated to active streams, and wherein a number of the active streams is determined based on the signal-to-noise ratio.

21. The method of claim 14 , further comprising:
performing MIMO detection of multiple streams subsequent to receive sector sweeping.

Assignees

• Intel Corp

Inventors

• Orhan Oner
• Nikopour Hosein
• Talwar Shilpa
• Shaviv Dor
• Doostnejad Roya
• Sajuyigbe Adesoji J

Classifications

• H04B7/0868 Primary

  Hybrid systems, i.e. switching and combining · CPC title

• H04B7/0491

  using two or more sectors, i.e. sector diversity · CPC title

• H04B17/221

  of receiver antennas, e.g. as to amplitude or phase · CPC title

• H04B17/12

  of transmit antennas, e.g. of the amplitude or phase · CPC title

• H04B7/06952 Primary

  Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping · CPC title