| 摘要 |
The invention relates to a mobile radio receiver comprising a receiving device ( 22, 19 ) for receiving time reference signals. In order to allow a precise real-time indication on mobile radios, a mobile radio is proposed comprising a GSM receiving unit ( 1 ) with a next-in-line analog-to-digital converter ( 3 ) for converting analog signals into digital signals, a digital signal processor ( 4 ) for reconstructing and processing the received signals, a system controller ( 5 ) for controlling the components of the mobile radio, a real-time circuit ( 7 ) comprising an oscillator ( 8 ) and a display ( 6 ) for showing information, in which mobile radio a further receiving unit ( 19, 22 ) is arranged for receiving a time reference signal, which further receiving unit ( 19, 22 ) comprises an antenna ( 18, 13 ) for receiving time reference signals, tunable capacitors ( 12 ) for being tuned to the transmit frequency and an amplifier ( 11 ) for amplifying the received time reference signal, and a multiplex unit ( 2 ) inserted between the GSM receiving unit 1 ) and the analog-to-digital converter ( 3 ), which multiplex unit ( 2 ) can be supplied with the received analog mobile radio signal and the time reference signal and in which mobile radio the received time reference signal can be applied at a predetermined instant to the digital signal processor DSP ( 4 ) for demodulation and filtering and to the system controller ( 5 ) for decoding, and there is provided to update the real-time circuit ( 7 ) with the decoded time reference signal. In this way a GSM mobile radio is obtained with little hardware or software supplements, which mobile radio is in a position to receive and decode a time reference signal and use the time reference signal for updating the real-time circuit ( 7 ). |
