Environmental simulator for a wireless communication device

• US 6,208,841 B1
• Filed: 05/03/1999
• Issued: 03/27/2001
• Est. Priority Date: 05/03/1999
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Dhaliwal, Upkar, Draxler, Paul J., Wallace, Raymond C.
• Primary Examiner(s): Eisenzopf, Reinhard
• Assistant Examiner(s): Mehrpour, Naghmeh
• Application Number:
  US09/305,256
• Time in Patent Office: 694 Days
• Field of Search: 455/423, 455/424, 455/562, 455/67.1, 455/67.6, 455/67.4, 455/446
• US Class Current: 455/67.12
• CPC Class Codes: H04B 17/0087 using auxiliary channels or channel simulators
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements

Abstract

An environmental simulator for use in the testing of wireless devices comprises a base station simulator, a signal manipulator, a switch and an antenna array. The environmental simulator is configured to couple wireless signals to and from a device under test in order to test the performance of the device over a variety of real world operating conditions.

Claims

1. An environmental simulator for use in the testing of wireless devices, comprising:

a base station simulator configured to create forward link signaling intended for a wireless remote unit;

a signal manipulator coupled to said base station simulator and configured to impose a measure of manipulation of said forward link signaling in order to produce one or more manipulated forward link signals;

a switch having a plurality of input ports coupled to said one or more manipulated forward link signals and having a series of output ports, wherein said switch is configured to programmably couple one or more input port to one or more output port;

an antenna array comprising a plurality of antennas, each antenna coupled to at least one of said series of output ports, said antenna array configured to couple wireless signals to a wireless remote unit; and

a controller coupled to said signal manipulator and said switch, said controller controlling said measure of manipulation imposed by said signal manipulator and said programmable coupling of said switch.

2. The environmental simulator of claim 1, further comprising an element to simulate the effects of a human located within said antenna array.

3. The environmental simulator of claim 1, wherein said antenna array forms a hemispherical dome.

4. The environmental simulator of claim 1, wherein said controller is configured to command said signal manipulator to generate time offset versions of said forward link signaling and to command said switch to couple said versions to a first set of said antennas within said array of antennas in order to simulate a multipath environment.

5. The environmental simulator of claim 1, wherein said controller is configured to command said signal manipulator to generate interference signals and to command said switch to couple said interference signals to a first set of said antennas within said array of antennas.

6. The environmental simulator of claim 5, wherein said interference signals simulate other forward link signaling.

7. The environmental simulator of claim 5, wherein said interference signals simulate jammers.

8. The environmental simulator of claim 1, wherein said base station simulator is further configured to receive reverse link signaling from said wireless remote unit and to determine a level of performance based upon said reverse link signaling.

9. The environmental simulator of claim 8, wherein said wireless remote unit is a CDMA unit capable of demodulating multipath signals.

10. The environmental simulator of claim 8, wherein said wireless remote unit reflects data from said forward link signaling on said reverse link signaling.

11. A method of wireless remote unit testing, comprising the steps of:

generatrng wireless for ward link signaling;

manipulating said forward link signal link to generate specified test conditions thereby creating one or manipulated signals;

coupling said one or more manipulated signals to a set of selected antennas within an array of antennas; and

collecting a set of test data from a wireless device under test wherein said device under test is wirelessly coupled to said antenna array and is capable of separately receiving multipath signals.