| 摘要 |
The present invention discloses a method for determining a Voltage Standing Wave Ratio (VSWR) in downlink period of a radio communication, comprising: coupling a forward signal into a Transmitter Observation Receiver (TOR) via a Radio Frequency (RF) switch; feeding a reversed signal in a reversed path from a third port of a circulator into the TOR via the RF switch; making down conversion, filtering and converting the forward signal and the reversed signal from an analog signal into digital base-band signal respectively; measuring and storing power levels of the forward signal and the reversed signal in form of digital baseband; and calculating VSWR or Return Loss (RL) value from the stored power levels of the forward signal and the reversed signal. A corresponding apparatus and radio communication system are also provided. This provides an improved VSWR detection method with low complexity and low cost, etc. |
