Over-the-air test

• US 9,786,999 B2
• Filed: 02/25/2009
• Issued: 10/10/2017
• Est. Priority Date: 10/06/2008
• Status: Active Grant

• Current Assignee: Keysight Technologies Singapore Sales Pte Ltd (Keysight Technologies, Inc.)
• Original Assignee: Keysight Technologies Singapore (Holdings) Pte. Limited. (Keysight Technologies, Inc.)
• Inventors: Kyosti, Pekka, Nuutinen, Jukka-Pekka
• Primary Examiner(s): HSIEH, PING Y
• Application Number:
  US13/121,691
• Publication Number:
  US 20110189962A1
• Time in Patent Office: 3,149 Days
• Field of Search: 455 6711, 455 6712, 455425, 4552261, 455304, 4551152, 455146, 455225, 455303, 455500, 455501, 455502, 455503, 455504, 455505, 455506
• CPC Class Codes: H01Q 21/20 the units being spaced along or adjacent to a curvilinear path slotted waveguide arrays H01Q21/005; circularly or helically slotted waveguides H01Q21/0062
• CPC Class Codes: H01Q 25/00 Antennas or antenna systems providing at least two radiating patterns arrangements for changing or varying the orientation or the shape of the directional pattern H01Q3/00
• CPC Class Codes: H04B 17/3912 Simulation models, e.g. distribution of spectral power density or received signal strength indicator [RSSI] for a given geographic region

Abstract

A testing system optimizes a cost function of a theoretical spatial cross correlation and a spatial correlation obtained with antenna elements for determining weights of the antenna elements, and forms a beam of a signal of at least one path of a simulated radio channel with at least two antenna elements of a plurality of antenna elements coupled to an emulator in an anechoic chamber. The at least two antenna elements are capable of polarizing the beam in a known manner.

Claims

1. A method of communicating with an electronic device under test through a simulated radio channel of an emulator, the method comprising:

optimizing a cost function of a theoretical spatial cross correlation and a spatial correlation associated with a plurality of antenna elements coupled to an emulator in an anechoic chamber to determine weights of the plurality of antenna elements; and

forming, based on the weights, a beam of a signal of at least one path of a simulated radio channel with at least two antenna elements of the plurality of antenna elements, wherein a direction of each path depends on a direction of each antenna element.

2. A method of communicating with an electronic device under test through a simulated radio channel of an emulator, the method comprising:

optimizing a cost function of a theoretical spatial cross correlation and a spatial correlation associated with a plurality of antenna elements coupled to an emulator in an anechoic chamber to determine optimized weights of the antenna elements; and

forming, based on optimized the weights, a beam of a signal of at least one path of a simulated radio channel with at least two antenna elements of the plurality of antenna elements, the at least two antenna elements being coupled to the emulator in the anechoic chamber, the at least two antenna elements polarizing the beam.

3. A testing system of communicating with an electronic device under test through a simulated radio channel of an emulator, wherein the testing system is configured to:

optimize a cost function of a theoretical spatial cross correlation and a spatial correlation associated with a plurality of antenna elements coupled to emulator in an anechoic chamber to determine weights of the plurality of antenna elements; and

form, based on the weights, a beam of a signal of at least one path of a simulated radio channel with at least two antenna elements of the plurality of the antenna elements.

4. A testing system of communicating with an electronic device under test through a simulated radio channel of an emulator, wherein the testing system is configured to:

optimize a cost function of a theoretical spatial cross correlation and a spatial correlation associated with a plurality of antenna elements coupled to an emulator in an anechoic chamber to determine optimized weights of the plurality of antenna elements; and

form, based on the optimized weights, a beam of a signal of at least one path of a simulated radio channel with at least two antenna elements of the plurality of the antenna elements, the at least two antenna elements being coupled to the emulator in an anechoic chamber, die at least two antenna elements being configured to polarize the beam.