System for regulating the power output of and linearizing the tr

Details System for regulating the power output of and linearizing the tr System for regulating the power output of and linearizing the tr

1997-06-27

1998-10-06

Urban, Edward F.

Telecommunications

Transmitter

With feedback of modulated output signal

455 84, 455115, H04B 7005

Patent

active

058191658

ABSTRACT:
The invention is based on utilizing the receiver of a radio device to detect measured quantities related to a transmission signal. In the power regulating method according to the present invention, which is based on a power regulating loop, transmission power is detected in the receiver of the radio device. Part of the transmission signal (f.sub.TX) is input to the carrier frequency part of the signal path of the receiver by and detected. A signal that is proportional to the power level is produced by a RSSI detector of the receiver, for example. The same circuit can also be utilized in the linearization of a transmission signal based on a closed loop by means of predistortion. Both the power regulation method and the linearization method can be applied in radio telephone systems based on both time-division and continuous transmission and reception.

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