초록 ▼

In a radio communication system, an adaptive transmitter power control system is described wherein the signal level at each receiver is monitored and a control signal, which is a function of the signal level, is transmitted back to the transmitting station to adjust the transmitter output power, as

In a radio communication system, an adaptive transmitter power control system is described wherein the signal level at each receiver is monitored and a control signal, which is a function of the signal level, is transmitted back to the transmitting station to adjust the transmitter output power, as required. By transmitting the lowest power level consistent with system objectives, the repeater circuits operate in a highly linear mode, and cochannel interference is significantly reduced.

대표청구항 ▼

A radio transceiver comprising: a receiver section capable of receiving an information signal destined for an end user in a predetermined channel from a remote, immediately preceding, transmitter of a radio system, the receiver section comprising amplifier means including an automatic gain control (

A radio transceiver comprising: a receiver section capable of receiving an information signal destined for an end user in a predetermined channel from a remote, immediately preceding, transmitter of a radio system, the receiver section comprising amplifier means including an automatic gain control (AGC) arrangement capable of generating a d-c control signal which has a magnitude that (a) is a function of the amplitude of the received information signal at any instant of time and (b) can vary between a predetermined range of amplitude levels; means responsive to the d-c control signal from the AGC arrangement of the amplifier means in the receiver section for generating an a-c control signal whose frequency is (a) a function of the magnitude of the d-c control signal at any instant of time, and (b) lies within a predetermined band of frequencies within a range of a loop bandwidth of the AGC arrangement of the receiver section; and a transmitter section capable of transmitting an information signal destined for a remote end user in a predetermined transmission channel to a remote, next sequential, receiver of the radio system associated with said remote transmitter, the transmitter section comprising amplifier means including an AGC arrangement which is responsive to the a-c control signal from the generating means for amplitude modulating (AM) the amplitude of the information signal transmitted in the predetermined transmission channel to the remote, next sequential, receiver in accordance with the frequency variations of said a-c control signal from the generating means.