Pulse or digital communications – Repeaters – Testing
Patent
1989-10-13
1991-04-23
Cangialosi, Salvatore
Pulse or digital communications
Repeaters
Testing
H04K 104
Patent
active
050105574
ABSTRACT:
A mobile radio transmitter loaded on a traveling object which transmits high-frequency signals as a carrier signal in order to provide information about a temporary location of the mobile object to a control station independently of the number of the mobile objects, and regardless of the occurrence mutual interference in frequency, by adapting a frequency expanding method. The transmitter includes a first amplifier 10 for amplifying a high-frequency signal; a demodulator 20 for demodulating a calling code signal and a received carrier signal; a decoder 30 for decoding the calling code signal; a pseudo noise generator 40 for generating pseudo noise; a modulator 50 for executing a first modulation of said pseudo noise; a second amplifier 60 for amplifying the high-frequency signal generated from said modulator; a duplexor 70 for transmitting the amplified high frequency signal or outputting the high frequency signal received through an antenna ANT to the first amplifier; and controller 80 for the overall operation.
REFERENCES:
patent: 3714573 (1973-01-01), Grossman
patent: 3860922 (1975-01-01), Wagner
patent: 4736390 (1988-04-01), Ward et al.
patent: 4894841 (1990-01-01), Martinino et al.
patent: 4910521 (1990-03-01), Mellon
Bushnell Robert E.
Cangialosi Salvatore
Lee Keon-Joo
Rhee Chul
Samsung Electronics Co,. Ltd.
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