Beam codebook generation method, beam search method and related apparatuses

• US 9,160,433 B2
• Filed: 01/30/2015
• Issued: 10/13/2015
• Est. Priority Date: 07/31/2012
• Status: Expired due to Fees

• Current Assignee: Beijing University of Posts and Telecommunications, Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Beijing University of Posts & Telecommunications, Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Liu, Pei, Du, Guanglong, Zou, Weixia
• Primary Examiner(s): FILE, ERIN M
• Application Number:
  US14/610,583
• Publication Number:
  US 20150171945A1
• Time in Patent Office: 256 Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/0456 Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
• CPC Class Codes: H04B 7/0465 taking power constraints at power amplifier or emission constraints, e.g. constant modulus, into account
• CPC Class Codes: H04B 7/06 at the transmitting station
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04L 25/03898 codebook-based design selection of codebook or precoding matrix for MIMO diversity systems H04B7/0456

Abstract

Embodiments of the present invention disclose a beam codebook generation method, includes: calculating a first array response factor of a reference beam according to the number of actually generated beam signal channels, and calculating a second array response factor of the reference beam according to the preset number of target beam signal channels; performing radiated power normalization processing on the first array response factor to obtain a first radiation factor of the reference beam, and performing radiated power normalization processing on the second array response factor to obtain a second radiation factor of the reference beam; performing normalization processing on the first radiation factor and second radiation factor to obtain a beam codebook of the reference beam; and performing rotation processing on the obtained beam codebook of the reference beam to obtain a beam codebook of one or more other beams except the reference beam in the target beams.

Claims

1. A beam codebook generation method, comprising:

calculating a first array response factor of a reference beam with a specified sequence number in target beams according to the number of actually generated beam signal channels, and calculating a second array response factor of the reference beam in the target beams according to the preset number of target beam signal channels;

performing radiated power normalization processing on the first array response factor to obtain a first radiation factor of the reference beam, and performing radiated power normalization processing on the second array response factor to obtain a second radiation factor of the reference beam;

performing normalization processing on the obtained first radiation factor and second radiation factor of the reference beam to obtain a beam codebook of the reference beam; and

performing rotation processing on the obtained beam codebook of the reference beam to obtain a beam codebook of one or more other beams except the reference beam in the target beams.

2. The beam codebook generation method according to claim 1, wherein a value of the number of the target beam signal channels is less than or equal to the number of the actually generated beam signal channels.

3. The beam codebook generation method according to claim 1, wherein the number of the target beams is less than or equal to twice of the number of the target beam signal channels, and the sequence number of the reference beam in the target beams is less than or equal to the number of the target beam signal channels.

4. The beam codebook generation method according to claim 1, the calculating a first array response factor of a reference beam with a specified sequence number in target beams according to the number of actually generated beam signal channels comprises:

calculating the first array response factor of the reference beam in the target beams according to a formula

5. The beam codebook generation method according to claim 4, wherein the performing radiated power normalization processing on the first array response factor to obtain a first radiation factor of the reference beam comprises:

calculating the first radiation factor of the reference beam according to a formula

6. The beam codebook generation method according to claim 5, wherein the performing normalization processing on the obtained first radiation factor and second radiation factor of the reference beam to obtain a beam codebook of the reference beam comprises:

calculating the beam codebook of the reference beam according to a formula

7. The beam codebook generation method according to claim 5, wherein the performing normalization processing on the obtained first radiation factor and second radiation factor of the reference beam to obtain a beam codebook of the reference beam comprises:

calculating the beam codebook of the reference beam according to a formula

8. The beam codebook generation method according to claim 5, wherein the performing normalization processing on the obtained first radiation factor and second radiation factor of the reference beam to obtain a beam codebook of the reference beam comprises:

calculating the beam codebook of the reference beam according to a formula

9. The beam codebook generation method according to claim 5, wherein the performing rotation processing on the obtained beam codebook of the reference beam to obtain a beam codebook of one or more other beams except the reference beam in the target beams comprises:

calculating the beam codebook of one or more other beams except the reference beam in the target beams according to a formula

10. A beam codebook generation apparatus, comprising:

an array response factor obtaining unit, configured to calculate a first array response factor of a reference beam with a specified sequence number in target beams according to the number of actually generated beam signal channels, and calculate a second array response factor of the reference beam in the target beams according to the preset number of target beam signal channels;

a radiation factor obtaining unit, configured to perform radiated power normalization processing on the first array response factor, which is obtained by the array response factor obtaining unit, to obtain a first radiation factor of the reference beam, and perform radiated power normalization processing on the second array response factor, which is obtained by the array response factor obtaining unit, to obtain a second radiation factor of the reference beam;

a first beam codebook obtaining unit, configured to perform normalization processing on the first radiation factor and the second radiation factor of the reference beam, which are obtained by the radiation factor obtaining unit, to obtain a beam codebook of the reference beam; and

a second beam codebook obtaining unit, configured to perform rotation processing on the beam codebook of the reference beam to obtain a beam codebook of one or more other beams except the reference beam in the target beams, wherein the beam codebook of the reference beam is obtained by the first beam codebook obtaining unit.

11. The beam codebook generation apparatus according to claim 10, further comprising:

a setting unit, configured to set the number of the target beam signal channels and the sequence number of the reference beam, wherein a value of the set number of the target beam signal channels is less than or equal to the number of the beam signal channels.

12. The beam codebook generation apparatus according to claim 10, wherein the setting unit sets the sequence number of the reference beam to be less than or equal to the number of the target beam signal channels.

13. The beam codebook generation apparatus according to claim 10, wherein the array response factor obtaining unit is specifically configured to calculate the first array response factor of the reference beam in the target beams according to a formula

14. The beam codebook generation apparatus according to claim 13, wherein the radiation factor obtaining unit is specifically configured to calculate the first radiation factor of the reference beam in the target beams according to a formula

15. The beam codebook generation apparatus according to claim 14, wherein the first beam codebook obtaining unit is specifically configured to:

according to a formula

16. The beam codebook generation apparatus according to claim 14, wherein the first beam codebook obtaining unit is specifically configured to:

according to a formula

17. The beam codebook generation apparatus according to claim 14, wherein the first beam codebook obtaining unit is specifically configured to:

according to a formula

18. The beam codebook generation apparatus according to claim 14, wherein the second beam codebook obtaining unit is specifically configured to:

according to a formula

19. The beam codebook generation apparatus according to claim 10, wherein the beam signal channel is an antenna array element channel or a filter channel.