Patent ID: 9154177
Filing Date: 2015-10-06
Classification: H04B,H04W

Abstract:
1. A method for controlling a transmission and reception timing of a Base Station (BS) antenna for Time Division Duplexing (TDD) wireless communications, the method comprising: separating a control signal and a downlink Radio Frequency (RF) signal from a modulated signal received from a base station; monitoring a TDD synchronization signal derived from the received modulated signal; detecting the downlink RF signal in a transmission path of the BS antenna; checking a periodic signal derived from at least the detected downlink RF signal and indicating respective downlink RF transmission and uplink RF reception time periods; calculating an error comprising a timing difference between the TDD synchronization signal and the periodic signal; and outputting at least one transmission and reception switching control signal to a reception signal amplifier that isolates a downlink transmission mode path and prevents introduction of a downlink transmission signal into an uplink reception path containing a reception amplifier and an isolator in response to the error equaling or exceeding a predetermined threshold.