Radio paging receiver capable of establishing clock synchronizat

Details Radio paging receiver capable of establishing clock synchronizat Radio paging receiver capable of establishing clock synchronizat

1993-05-28

1995-02-14

Urban, Edward F.

Telecommunications

Transmitter and receiver at separate stations

375106, H04B 700

Patent

active

053903404

ABSTRACT:
In a radio paging receiver operable in response to a radio signal which includes a preamble signal, a call number signal, and a display information signal to decode the call number signal and the display information signal in synchronism with a sequence of internal clock pulses produced from a clock synchronization circuit, the internal clock pulses are also produced from the clock synchronization circuit during a time interval except for the preamble signal with reference to electric field intensity and a phase or a frequency difference between the internal clock pulse sequence and a sequence of digital signal derived from the radio signal. Specifically, the internal clock pulse sequence is produced again when the electric field intensity and the phase or the frequency difference become large so as to keep synchronization of the internal clock pulse sequence during reception of the radio signal.

REFERENCES:
patent: 4573173 (1986-02-01), Yoshida
patent: 4953185 (1990-08-01), Goode

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