Transceiver apparatus having self-calibration mechanism and self-calibration method thereof
The present disclosure discloses a transceiver apparatus having self-calibration mechanism that includes a signal transmission path, a signal receiving path, a path switching circuit, a transceiver circuit and a self-calibration circuit. The path switching circuit includes a switch to switch a connection relation among an antenna, the signal transmission path and the signal receiving path. The transceiver circuit is coupled to the signal transmission path and the signal receiving path. The self-calibration circuit controls the transceiver circuit to transmit a transmission signal through the signal transmission path to the path switching circuit and receives a leakage signal generated according to the transmission signal through the signal receiving path, so as to perform a self-calibration process on the transceiver circuit based on the transmission signal and the leakage signal. The leakage signal has a leakage signal strength larger than a predetermined level.
1 . A transceiver apparatus having self-calibration mechanism, comprising:
a plurality of signal transmission paths and a plurality of signal receiving paths;
a path switching circuit coupled to the signal transmission paths and the signal receiving paths at a first side, coupled to an antenna at a second side and comprising a switch to switch a connection relation among the antenna, the signal transmission paths and the signal receiving paths;
a transceiver circuit coupled to the signal transmission path and the signal receiving path; and
a self-calibration circuit configured to control the transceiver circuit to transmit a transmission signal through one of the signal transmission paths to the path switching circuit and receive a leakage signal generated according to the transmission signal through the signal receiving paths, so as to perform a plurality of different self-calibration processes on the transceiver circuit based on the transmission signal and the leakage signal, wherein the leakage signal has a leakage signal strength larger than a predetermined level.
2 . The transceiver apparatus of claim 1 , wherein at least a part of the signal transmission paths and at least a part of the signal receiving paths comprises a filter.
3 . The transceiver apparatus of claim 1 , wherein when the self-calibration circuit performs the self-calibration process, the transceiver circuit simultaneously performs at least one of signal transmission and signal receiving through the signal transmission paths and the signal receiving paths not corresponding to the performance of the self-calibration process.
4 . The transceiver apparatus of claim 1 , wherein the transmission signal transmitted to the path switching circuit has a transmission signal strength, the path switching circuit generates an isolation amount between the signal transmission paths and the signal receiving paths, and the leakage signal strength is a difference between the transmission signal strength and the isolation amount.
5 . The transceiver apparatus of claim 1 , wherein the path switching circuit is a single pole multiple throw switch circuit coupled to a single antenna or a multiple pole multiple throw switch circuit coupled to a plurality of antennas.
6 . The transceiver apparatus of claim 1 , further comprising an amplifier circuit disposed at the signal transmission paths and configured to perform power amplification on the transmission signal.
7 . The transceiver apparatus of claim 1 , wherein the self-calibration process comprises an IQ image rejection calibration, a digital pre-distortion calibration, a LO leakage calibration, DC offset calibration, a transmitter output power calibration or a combination thereof.
8 . A self-calibration method of a transceiver apparatus, the self-calibration method comprising:
switching a connection relation among an antenna, a plurality of signal transmission paths and a plurality of signal receiving paths by a switch comprised by a path switching circuit, wherein the path switching circuit is coupled to the signal transmission paths and the signal receiving paths at a first side and is coupled to the antenna at a second side;
transmitting a transmission signal through one of the signal transmission paths to the path switching circuit and receiving a leakage signal generated according to the transmission signal through the signal receiving paths by a transceiver circuit coupled to the signal transmission paths and the signal receiving paths, wherein the leakage signal has a leakage signal strength larger than a predetermined level; and
performing a plurality of different self-calibration processes on the transceiver circuit by a self-calibration circuit based on the transmission signal and the leakage signal.
9 . The self-calibration method of claim 8 , wherein at least a part of the signal transmission paths and at least a part of the signal receiving paths comprises a filter.
10 . The self-calibration method of claim 8 , further comprising:
when the self-calibration circuit performs the self-calibration process, simultaneously performing at least one of signal transmission and signal receiving through the signal transmission paths and the signal receiving paths not corresponding to the performance of the self-calibration process by the transceiver circuit.
11 . The self-calibration method of claim 8 , wherein the transmission signal transmitted to the path switching circuit has a transmission signal strength, the path switching circuit generates an isolation amount between the signal transmission paths and the signal receiving paths, and the leakage signal strength is a difference between the transmission signal strength and the isolation amount.
12 . The self-calibration method of claim 8 , wherein the path switching circuit is a single pole multiple throw switch circuit coupled to a single antenna or a multiple pole multiple throw switch circuit coupled to a plurality of antennas.
13 . The self-calibration method of claim 8 , wherein the transceiver apparatus further comprises an amplifier circuit disposed at the signal transmission paths, the self-calibration method further comprises:
performing power amplification on the transmission signal by the amplifier circuit.
14 . The self-calibration method of claim 8 , wherein the self-calibration process includes an IQ image rejection calibration, a digital pre-distortion calibration, a LO leakage calibration, DC offset calibration, a transmitter output power calibration or a combination thereof.