Software portable telephone

Details Software portable telephone Software portable telephone

2006-04-18

2006-04-18

Urban, Edward F. (Department: 2685)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S095000, C455S550100, C455S129000

Reexamination Certificate

active

07031749

ABSTRACT:
Received signal inputted from an antenna1is fed via a received signal mixer2and an A/D converter3to a demodulator4. The demodulator4is operated according to software down-loaded in a software memory5from a program memory6. A demodulator output digital signal is fed to a base-band signal processor8for signal processing, and then fed out through a man-machine interface9to the outside. On the transmission side, a signal to be transmitted is inputted to a modulator10though a route converse to that of the received signal. The modulator output is fed to a D/A converter11for conversion to an analog signal, which is in turn fed to a transmission signal mixer12for conversion to a carrier frequency, and then fed to a module, which includes a power amplifier21, a transmission signal filter22and an isolator23, to be transmitted via the antenna1.

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