Method and system for measuring standing wave ratio in a mobile communications system

A method for measuring a standing wave ratio for a transmission antenna in a base station of a mobile communications system which includes a test terminal, at least one transmission antenna and a variable attenuator, the method comprising the steps of:

• (a) generating a test signal by using said test terminal and transmitting said generated test signal to said transmission antenna;
• (b) when said test signal is transmitted to said transmission antenna, measuring the strength of a forward signal and a reflect signal for said transmission antenna;
• (c) adjusting said variable attenuator to make the strength of said forward signal equal to the strength of said reflect signal;
• and
• (d) calculating the standing wave ratio for said transmission antenna by using the strength of said adjusted signal;
• wherein said test terminal has a closed loop power control function which is disabled upon measurement of the standing wave ratio for said transmission antenna.

A method for measuring a standing wave ratio for an antenna in a base station of a mobile communications system which includes a test terminal and at least one antenna, the method comprising the steps of:

• (a) generating a test signal by using said test terminal and transmitting said generated test signal to said antenna;
• (b) when said test signal is transmitted to said antenna, measuring the strength of a forward signal and a reflect signal for said antenna;
• and
• (c) obtaining a difference between the strength of said forward signal and the strength of said reflect signal and calculating the standing wave ratio for said antenna by using said obtained difference therebetween;
• wherein step (a) comprises said test terminal assuming a test mode in response to a requirement for measurement of the standing wave ratio for said antenna, and said test signal has a given power strength upon measurement of the standing wave ratio for said antenna;
• and
• wherein said test terminal has a closed loop function which is disabled upon measurement of the standing wave ratio for said antenna.

A method for measuring a standing wave ratio for a reception antenna in a base station of a mobile communications system which includes a test terminal, at least one reception antenna, a transceiver and a variable attenuator, the method comprising the steps of:

• (a) generating a test signal by using said test terminal and transmitting said generated test signal to said reception antenna;
• (b) when said test signal is transmitted to said reception antenna, measuring the strength of a forward signal and a reflect signal for said reception antenna;
• (c) adjusting said variable attenuator to make the strength of said forward signal equal to the strength of said reflect signal;
• and
• (d) calculating the standing wave ratio for said reception antenna by using the strength of said adjusted signal;
• wherein step (a) comprises said test terminal assuming a test mode in response to a requirement for measurement of the standing wave ratio for said reception antenna, and
• wherein said test signal has a given power strength upon measurement of the standing wave ratio for said reception antenna;
• and
• wherein said test terminal has a closed loop function which is disabled upon measurement of the standing wave ratio for said reception antenna.

A system for measuring a standing wave ratio for an antenna in a base station of a mobile communications system which includes at least one antenna, comprising:

• test terminal means for generating a test signal and transmitting said generated test signal to said antenna;
• measuring means responsive to transmission of said test signal for measuring the strength of a forward signal and a reflect signal for said antenna;
• and
• calculating means for calculating a difference between the strength of said forward signal and the strength of said reflect signal and for obtaining the standing wave ratio for said antenna by using said calculated difference;
• wherein said test terminal has a closed loop power control function which is disabled upon measurement of the standing wave ratio for said antenna.

A system for measuring a standing wave ratio for an antenna in a base station of a mobile communications system which includes at least one antenna, comprising:

• test terminal means for generating a test signal and transmitting said generated test signal to said antenna;
• measuring means responsive to transmission of said test signal for measuring the strength of a forward signal and a reflect signal for said antenna;
• attenuator means for adjusting the strength of at least one of said forward signal and said reflect signal to make them equal to each other;
• and
• calculating means for calculating the standing wave ratio for said antenna by using the strength of said adjusted signal;
• wherein said test terminal means has a closed loop power control function which is disabled upon measurement of the standing wave ratio for said antenna.