Abstract: The present disclosure provides a phase sensitivity calibration method based on a phase generated carrier (PGC) technology, which is characterized in that in the operation process of a PGC algorithm, an additional calibration signal with a phase of known magnitude is applied through a phase modulator. This signal is demodulated through an arctangent algorithm or a differential cross multiplication algorithm, and a demodulated output value corresponding to a unit phase in the algorithm is obtained. The phase of known magnitude can be obtained by converting a carrier modulation depth parameter according to a certain ratio.

Abstract: The present disclosure provides a phase sensitivity calibration method based on a phase generated carrier (PGC) technology, which is characterized in that in the operation process of a PGC algorithm, an additional calibration signal with a phase of known magnitude is applied through a phase modulator. This signal is demodulated through an arctangent algorithm or a differential cross multiplication algorithm, and a demodulated output value corresponding to a unit phase in the algorithm is obtained. The phase of known magnitude can be obtained by converting a carrier modulation depth parameter according to a certain ratio.

Abstract: The present invention provides a method for establishing a service connection, comprising: before initiating a service request, UE will select a cell that can provide the said service; if a cell that can provide the said service is selected, UE will send a service request to the network in the cell that can provide the said service, and establish the service connection with the network; if no cell that can provide the said service is selected, UE will notify the subscriber that service connection is unsuccessful. UE performs cell selection/reselection according to the requested service and will not send a service request to the network until selecting a proper cell to reside, the process thereof can greatly increase service access probability and improve service quality, thus increasing subscribers' satisfaction toward services and promoting service expansion and application.