Radio apparatus, and method and program for controlling spatial path

• US 8,934,851 B2
• Filed: 03/06/2013
• Issued: 01/13/2015
• Est. Priority Date: 03/22/2002
• Status: Expired

• Current Assignee: Hera Wireless S.A. (Fineur International S.A.)
• Original Assignee: Hera Wireless S.A. (Fineur International S.A.)
• Inventors: Doi, Yoshiharu
• Primary Examiner(s): Wendell, Andrew
• Application Number:
  US13/786,888
• Publication Number:
  US 20130183909A1
• Time in Patent Office: 678 Days
• Field of Search: 455/561, 455/562.1, 455/575.1, 455/101, 455/112, 455/115.1, 455/132, 455/140, 455/216, 455/225, 455/67.11, 455/69, 455/522, 375/220, 375/221, 370/332
• US Class Current: 455/69
• CPC Class Codes: H01Q 1/246 specially adapted for base stations
• CPC Class Codes: H01Q 3/2605 Array of radiating elements provided with a feedback control over the element weights, e.g. adaptive arrays
• CPC Class Codes: H04B 7/04 using two or more spaced independent antennas
• CPC Class Codes: H04B 7/0408 using two or more beams, i.e. beam diversity
• CPC Class Codes: H04B 7/0417 Feedback systems
• CPC Class Codes: H04B 7/06 at the transmitting station
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/086 using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming
• CPC Class Codes: H04B 7/10 Polarisation diversity; Directional diversity

Abstract

A PDMA terminal (1000) establishes communication by forming a plurality of spatial paths to another single radio apparatus. A plurality of antennas constituting an array antenna are divided into a plurality of subarrays corresponding to the plurality of spatial paths respectively. An adaptive array processing unit (USP) can perform an adaptive array processing for each of the plurality of subarrays. A memory (MMU) stores in advance information on the number of antennas associated with the number of spatial paths that can be formed by the array antenna. A control unit (CNP) controls a processing to transmit possible multiplicity information to another radio apparatus at a prescribed timing.

Claims

1. A radio apparatus capable of communicating with another radio apparatus, comprising:

a communication unit configured to communicate using an antenna; and

a reception unit configured to receive, from said another radio apparatus, a value indicating possible multiplicity associated with the number of spatial paths that can be formed by said another radio apparatus, at a predetermined timing.

2. The radio apparatus according to claim 1, wherein said reception unit receive the value indicating possible multiplicity from said another radio apparatus in such a manner that the predetermined timing comes before a communication.

3. A radio apparatus according to claim 1, wherein said reception unit receives the number of spatial paths that the said another radio apparatus is capable of receiving, as the value indicating possible multiplicity.

4. A radio apparatus capable of communicating with another radio apparatus, comprising:

a communication unit configured to communicate using a plurality of antennas;

a storage unit configured to store beforehand a value indicating possible multiplicity associated with the number of spatial paths formable by said communication unit; and

a control unit configured to control a processing of transmitting the value indicating possible multiplicity to said another radio apparatus, at a predetermined timing.

5. A radio apparatus according to claim 4, wherein said control unit controls the processing of transmitting the value indicating possible multiplicity to said another apparatus in such a manner that the predetermined timing comes before a communication.

6. A radio apparatus according to claim 4, wherein said storage unit stores beforehand the number of spatial paths that the said radio apparatus is capable of receiving, as the value indicating possible multiplicity.

7. A radio apparatus capable of communicating with another radio apparatus, comprising:

a communication unit configured to communicate using a plurality of antennas; and

a reception unit configured to receive, from said another radio apparatus, a value indicating possible multiplicity associated with the number of spatial paths that can be formed by said another radio apparatus, at a predetermined timing.

8. A radio apparatus according to claim 7, wherein said reception unit receives the value indicating possible multiplicity from said another radio apparatus in such a manner that the predetermined timing comes before a communication.

9. A radio apparatus according to claim 7, wherein said reception unit receives the number of spatial paths that the said another radio apparatus is capable of receiving, as the value indicating possible multiplicity.