Radio transceiver and control method thereof

摘要

In order to reduce deterioration of reception performance even further in a case of simultaneously performing transmission and reception, a transmitting circuit (20), which forms a radio transceiver (1), outputs a transmission signal (110) to be wirelessly transmitted through an antenna (10). A duplexer (30) conducts the transmission signal (110) to the antenna (10), and outputs, as differential signals (102p and 102n), a reception signal wirelessly received through the antenna (10) to a receiving circuit (40). The receiving circuit (40) regulates phases of the differential signals (102p and 102n) based on a first characteristic of the reception signal under a condition that the transmission signal (110) is not output, and a second characteristic of the reception signal under a condition that the transmission signal (110) is output. Further, the receiving circuit (40) regulates gains of the differential signals (102p and 102n) based on a result obtained by comparing the first and second characteristics after the regulation of phases.

主权项

1. A radio transceiver comprising:
a transmitter that outputs a transmission signal to be wirelessly transmitted through an antenna; a duplexer that conducts the transmission signal to the antenna, and that outputs, as differential signals, a reception signal wirelessly received through the antenna; and a receiver, the differential signals being input to the receiver, wherein the receiver is configured to regulate phases of the differential signals based on a first characteristic of the reception signal under a condition that the transmission signal is not output, and a second characteristic of the reception signal under a condition that the transmission signal is output, and wherein the receiver is configured to:
compare, as the first and second characteristics, receiving sensitivities of the reception signal under both of the conditions; andregulate the phases of the differential signals relatively so that a difference between the receiving sensitivities becomes less than a predetermined threshold.