Method and apparatus for detecting offset signal of transmission leakage signal in RF transceiver
AssigneeNethom
InventorsHeon soo Choi, Chang su Choi, Hyung jun Jeon, Yeong chan Kim
Life of this patent
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Abstract
Disclosed is an RF transceiver in which transmission and reception are simultaneously performed, wherein a magnitude of a transmission leakage signal mixed into a receiving signal is measured, the maximum and minimum scopes on I/Q vector phase-plane in which an offset vector exists is set using the measured magnitude of the transmission leakage signal, the offset vector offsetting the transmission leakage signal as much as possible, a detection area in which the offset vector exists is determined in the set scope, and the offset vector is detected.
Claims10
A method for detecting an offset signal of a transmission leakage signal in an RF transceiver, the method comprising:
- measuring, by the RF transceiver that is used to simultaneously transmit and receive an RF signal, a magnitude of a transmission leakage signal mixed into the received RF signal;
- setting maximum and minimum scopes on an I/Q vector phase-plane in which an offset vector exists by using the measured magnitude of the transmission leakage signal, the offset vector offsetting the transmission leakage signal;
- and
- determining a detection area in which the offset vector exists and detecting the offset vector in the determined detection area, wherein setting the maximum and minimum scopes comprises:
- setting a first circle whose size is smaller than the measured magnitude of the transmission leakage signal on the I/Q vector phase-plane in the minimum scope, and
- setting a second circle whose size is greater than the measured magnitude of the transmission leakage signal in the maximum scope.
An apparatus for detecting an offset signal of a transmission leakage signal in an RF transceiver, the apparatus comprising:
- a leakage signal detector for detecting amplitude information of a transmission leakage signal that is mixed into a received signal;
- a controller for determining an offset vector using the amplitude information of the transmission leakage signal detected by the leakage signal detector and controlling a generation of the offset signal to offset the transmission leakage signal;
- and
- a leakage signal offset unit for generating the offset signal according to a control of the controller, outputting the generated offset signal and cancelling the transmission leakage signal mixed into the received signal,
- wherein the controller is configured to:
- set maximum and minimum scopes within which the transmission leakage signal exists on I/Q vector phase-plane according to the amplitude information of the transmission leakage signal detected by the leakage signal detector,
- divide an area between the set maximum and minimum scopes into a plurality of areas with the measured magnitude of the transmission leakage signal as a reference point on the I/Q vector phase-plane,
- determine a sample point for each divided area,
- detect a vector for each sample point,
- determine an area in which the offset vector exists using the detected vector for the sample point in each of the plurality of areas, and
- detect an offset vector at the determined area.
Dependencies are inferred from the claim text.