Communication station with automatic cable loss compensation
First Claim
1. A base station used in a wireless communication system, comprising:
- an antenna;
a remote power amplifier coupled to the antenna and co-located proximate to the antenna;
a ground based transmitter coupled to the remote power amplifier by an RF cable, comprising;
a first power level detector located at the front end of the RF cable configured to detect a first power level of the RF signal;
an attenuator coupled to the transmit signal line for adjustment to the transmit signal strength; and
a controller for controlling the attenuator;
a second power level detector located at the back end of the RF cable configured to detect a second power level of the RF signal;
whereby said controller compares said first and second detected power levels of the RF signal and controls the attenuator accordingly.
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Accused Products
Abstract
A wireless communications systems employing code-division multiple access information transmission techniques includes a transmission facility having ground-based transmission and reception electronic equipment, a remotely located RF power amplifier, an antenna, and an RF cable connecting the ground-based equipment with the remotely located RF power amplifier. Power level detectors in the ground-based equipment and in the remotely located RF power amplifier measure the signal level at each end of the RF cable. A microcontroller compares these measurements and adjusts a variable attenuator in the transmission signal path and a variable attenuator in the received signal path to compensate for signal level variability due to variations in signal loss.
39 Citations
8 Claims
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1. A base station used in a wireless communication system, comprising:
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an antenna;
a remote power amplifier coupled to the antenna and co-located proximate to the antenna;
a ground based transmitter coupled to the remote power amplifier by an RF cable, comprising;
a first power level detector located at the front end of the RF cable configured to detect a first power level of the RF signal;
an attenuator coupled to the transmit signal line for adjustment to the transmit signal strength; and
a controller for controlling the attenuator;
a second power level detector located at the back end of the RF cable configured to detect a second power level of the RF signal;
whereby said controller compares said first and second detected power levels of the RF signal and controls the attenuator accordingly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification