Apparatus and method for testing voltage standing wave ratio in a W-CDMA mobile communication system

• US 7,076,213 B2
• Filed: 03/26/2003
• Issued: 07/11/2006
• Est. Priority Date: 04/24/2002
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Jin-Su
• Primary Examiner(s): Nguyen, Lee
• Assistant Examiner(s): TRAN, TUAN A
• Application Number:
  US10/396,809
• Publication Number:
  US 20040203447A1
• Time in Patent Office: 1,203 Days
• Field of Search: 455/63.1, 455/67.11, 455 6713- 16, 455/67.7, 455/78, 455 80- 83, 4551151- 4, 455/117, 455/121, 455124-126, 455/129, 4552261- 4, 455423-425, 324/637, 324/642, 324645-647, 375224-228, 375/219, 343/703, 343/822, 343/828
• US Class Current: 455/67.14
• CPC Class Codes: H04B 17/0085 using test signal generators
• CPC Class Codes: H04B 17/318 Received signal strength

Abstract

An apparatus and method for testing a voltage standing wave ratio (VSWR) in a wideband code division multiple access (W-CDMA) mobile communication system. Upon detecting a VSWR test request, a controller determines an oscillation frequency information and a power level information of a test signal for a VSWR test, and generates a test signal generation request including the determined oscillation frequency information and power level information. Upon detecting the test signal generation request, a test signal generator generates a test signal corresponding to the oscillation frequency information and power level information, and provides the generated test signal to an antenna. A VSWR detector receives the test signal and a reflected signal of the test signal from the antenna, and calculates a VSWR using the received test signal and reflected signal.

Claims

1. An apparatus for testing a voltage standing wave ratio (VSWR) in a wideband code division multiple access (W-CDMA) mobile communication system, the apparatus comprising:

a controller for determining, upon detecting a VSWR test request, oscillation frequency information and a power level information of a test signal for a VSWR test, and generating a test signal generation request including the determined oscillation frequency information and power level information, wherein the controller selects two arbitrary frequency assignments (FAs) employed in the W-CDMA mobile communication system, and defines a frequency between center frequencies of the two selected FAs as the oscillation frequency information;

a test signal generator for generating, upon detecting the test signal generation request, a test signal corresponding to the oscillation frequency information and power level information, and providing the generated test signal to an antenna; and

a VSWR detector for receiving the test signal and a reflected signal of the test signal from the antenna, and calculating a voltage standing wave ratio using the received test signal and reflected signal.

2. The apparatus of claim 1, wherein the controller determines the power level information considering a noise floor level of a signal received at the W-CDMA mobile communication system, a peak power level of the received signal, and a data rate provided by the W-CDMA mobile communication system.

3. The apparatus of claim 1, further comprising a surface acoustic wave (SAW) filter for filtering the received signal at a frequency distanced by a prescribed value from a center frequency of each of the FAs.

4. The apparatus of claim 3, wherein the SAW filter rejects a power level of the test signal if the power level of the test signal is below a power level of the received signal.

5. An apparatus for testing a voltage standing wave ratio (VSWR) in a wideband coded division multiple access (W-CDMA) mobile communication system employing a plurality of frequency assignments (FAs), the apparatus comprising:

a controller for defining, upon detecting a VSWR test request, an oscillation frequency information of a test signal for a VSWR test as a frequency between center frequencies of two arbitrary FAs among the plurality of FAs, determining a power level information of the test signal, and generate a test signal generation request that includes the determined oscillation frequency information and the power level information;

a test signal generator for generating, upon detecting the test signal generation request, a test signal corresponding to the oscillation frequency information and the power level information, and providing the generated test signal to an antenna; and

a VSWR detector for receiving the test signal and a reflected signal of the test signal from the antenna, and calculating the VSWR using the received test signal and the reflected signal.

6. The apparatus of claim 5, wherein the controller is further adapted to determine the power level information using a noise floor level of a signal received at the W-CDMA mobile communication system, a peak level of the received signal, and a data rate provided by the W-CDMA mobile communication system.

7. The apparatus of claim 6, further comprising a surface acoustic wave (SAW) filter for filtering the received signal at a frequency distanced by a prescribed value from a center frequency of each of the FAs.

8. The apparatus of claim 7, wherein the SAW filter rejects a power level of the test signal if the power level of the test signal is below a power level of the received signal.

9. A method for testing a voltage standing wave ratio (VSWR) in a wideband code division multiple access (W-CDMA) mobile communication system, the method comprising the steps of:

upon detecting a VSWR test request, determining oscillation frequency information and power level information of a test signal for a VSWR test, and generating a test signal generation request including the determined oscillation frequency information and power level information, wherein the oscillation frequency information is defined as a frequency between center frequencies of two arbitrary frequency assignments (FAs) selected from a plurality of FAs employed in the W-CDMA mobile communication system;

upon detecting the test signal generation request, generating a test signal corresponding to the oscillation frequency information and power level information, and providing the generated test signal to an antenna; and

receiving the test signal and a reflected signal of the test signal from the antenna, and calculating a voltage standing wave ratio using the received test signal and reflected signal.

10. The method of claim 9, wherein the power level information is determined considering a noise floor level of a signal received at the W-CDMA mobile communication system, a peak power level of the received signal, and a data rate provided by the W-CDMA mobile communication system.

11. A method for testing a voltage standing wave ratio (VSWR) in a wideband coded division multiple access (W-CDMA) mobile communication system employing a plurality of frequency assignments (FAs), the method comprising the steps of:

defining an oscillation frequency information of a test signal for a VSWR test as a frequency between center frequencies of two arbitrary FAs among the FAs upon detecting a VSWR test request;

determining power level information of the test signal;

generating a test signal generation request including the determined oscillation frequency information and the power level information;

generating a test signal corresponding to the oscillation frequency information and the power level information upon detecting the test signal generation request; and

providing the generated reflected signal of the test signal from the antenna; and

calculating the VSWR using the received test signal and reflected signal.

12. The method of claim 11, wherein the power level information is determined using a noise floor level of a signal received at the W-CDMA mobile communication system, a peak level of the received signal, and a data rate provided by the W-CDMA mobile communication system.