Method for Antenna Array Partitioning

• US 20080136735A1
• Filed: 07/12/2007
• Published: 06/12/2008
• Est. Priority Date: 08/15/2006
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Navini Networks, Inc. (Cisco Systems, Inc.)
• Inventors: Jin, Hang, Hedayat, Ahmadreza
• Granted Patent: US 8,098,212 B2
• Time in Patent Office: Days
• US Class Current: 343/893
• CPC Class Codes: H01Q 3/26 varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture H01Q3/12, H01Q3/22, H01Q3/24 take precedence
• CPC Class Codes: H04B 7/0686 Hybrid systems, i.e. switching and simultaneous transmission
• CPC Class Codes: H04B 7/0689 using different transmission schemes, at least one of them being a diversity transmission scheme
• CPC Class Codes: H04B 7/0691 using subgroups of transmit antennas
• CPC Class Codes: H04L 5/0023 Time-frequency-space

Abstract

A method for partitioning a plurality of antennas in a wireless communication system, in which the antennas are grouped into a first set of partitions and a second set of partitions. One or more signal transmission schemes are performed with the antennas grouped into the first set of partitions for a first time period, and then with the antennas grouped into the second set of partitions for a second time period.

Claims

1. A method for partitioning a plurality of antennas in a wireless communication system, comprising:

grouping the antennas into a first set of partitions;

grouping the antennas into a second set of partitions;

performing one or more signal transmission schemes with the antennas grouped into the first set of partitions for a first time period; and

performing the one or more signal transmission schemes with the antennas grouped into the second set of partitions for a second time period.

2. The method of claim 1, wherein the first and second sets of partitions are selected pseudo-randomly.

3. The method of claim 1, wherein the first and second sets of partitions are selected without acquiring statistical knowledge of wireless channels in the wireless communication system.

4. The method of claim 1, wherein the second time period follows the first time period immediately.

5. The method of claim 1, wherein the partitions have different numbers of antennas.

6. The method of claim 1, wherein the first and second time periods have different durations.

7. The method of claim 1, wherein the one or more signal transmission schemes comprise beam forming and space-time code technologies.

8. A method for partitioning a plurality of antennas in a wireless communication system, comprising:

grouping the antennas into a first set of partitions;

grouping the antennas into a second set of partitions;

performing one or more signal transmission schemes with the antennas grouped into the first set of partitions in a first slot of channel resources defined by a first time period multiplied by a first frequency range; and

performing the one or more signal transmission schemes with the antennas grouped into the second set of partitions in a second slot of channel resources defined by a second time period multiplied by a second frequency range.

9. The method of claim 8, wherein the first and second sets of partitions are selected pseudo-randomly.

10. The method of claim 8, wherein the first and second sets of partitions are selected without acquiring statistical knowledge of wireless channels in the wireless communication system.

11. The method of claim 8, wherein the partitions have different numbers of antennas.

12. The method of claim 8, wherein the first and second time periods have different durations, and the first and second frequency ranges have different bandwidths.

13. The method of claim 8, wherein the one or more signal transmission schemes comprise beam forming and space-time code technologies.

14. The method of claim 8, wherein the wireless communication system uses orthogonal frequency-division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA) technology.

15. A wireless communication system comprising:

a plurality of antennas grouped into at least a first set of partitions and a second set of partitions; and

a wireless node for receiving signals from the antennas,

wherein the antennas transmit the signals using a combination of beam forming and space-time code technologies via virtual antennas defined by the first set of partitions for a first portion of channel resource, and by the second set of partitions for a second portion of channel resource.

16. The wireless communication system of claim 15, wherein the first and second portions of channel resources are time periods.

17. The wireless communication system of claim 15, wherein the first and second portions of channel resources are defined by time periods multiplied by frequency ranges.

18. The wireless communication system of claim 15, wherein the first and second sets of partitions are selected pseudo-randomly.

19. The wireless communication system of claim 15, wherein the first and second sets of partitions are selected without acquiring statistical knowledge of wireless channels in the wireless communication system.

20. The wireless communication system of claim 15, uses orthogonal frequency-division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA) technology.