ISOLATION MEASUREMENT AND SELF-OSCILLATION PREVENTION IN TDD-OFDM REPEATER FOR WIRELESS BROADBAND DISTRIBUTION TO SHADOWED AREAS
First Claim
1. A method of establishing and maintaining isolation status of a radio frequency (RF) repeater, the method comprising the steps of:
- registering the RF repeater with a base transceiver station (BTS) using a subscriber modem device coupled to the RF repeater;
calibrating uplink output levels of a donor RF transceiver and storing output level values in the modem device;
synchronizing the modem device to a BTS transmission received at the donor RF transceiver;
providing synchronization information to a server RF transceiver of the repeater;
performing isolation detection and measurement between donor transmit antenna and receive server antenna of the RF repeater; and
adjusting automatic gain control parameters of donor RF transceiver and server RF transceiver based upon the isolation detection and measurement value.
5 Assignments
0 Petitions
Accused Products
Abstract
A method for determining isolation status of the RF repeater is provided. A modem in the repeater registers with a base transceiver station (BTS). Uplink output levels of a donor RF transceiver are calibrated and stored in the modem. The modem is synchronized to a BTS transmission received at the donor RF transceiver and the synchronization information is provided to a server RF transceiver of the repeater. Isolation detection and measurement can then be performed between donor transmit antenna and receive server antenna of the RF repeater and the automatic gain control parameter of donor RF transceiver and server RF transceiver are adjusted based upon the isolation detection and measurement value. The isolation and detection can be implemented in a co-processor coupled to the donor and server transceivers.
154 Citations
20 Claims
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1. A method of establishing and maintaining isolation status of a radio frequency (RF) repeater, the method comprising the steps of:
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registering the RF repeater with a base transceiver station (BTS) using a subscriber modem device coupled to the RF repeater; calibrating uplink output levels of a donor RF transceiver and storing output level values in the modem device; synchronizing the modem device to a BTS transmission received at the donor RF transceiver; providing synchronization information to a server RF transceiver of the repeater; performing isolation detection and measurement between donor transmit antenna and receive server antenna of the RF repeater; and adjusting automatic gain control parameters of donor RF transceiver and server RF transceiver based upon the isolation detection and measurement value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16)
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10. A processor, in a radio frequency (RF) repeater, for establishing and maintaining isolation status of the RF repeater, the method performing the steps of:
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registering the RF repeater with a base transceiver station (BTS); calibrating and storing uplink output levels of a donor RF transceiver and storing in the processor; synchronizing to a BTS transmission received at the donor RF transceiver; providing synchronization information to a server RF transceiver of the repeater; performing isolation detection and measurement between donor transmit antenna and receive server antenna of the RF repeater; and adjusting automatic gain control parameter of donor RF transceiver and server RF transceiver based upon the isolation detection and measurement value.
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17. An radio frequency (RF) repeater comprising:
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a donor transceiver coupled to a donor antenna having a transmit portion and a receive portion; a server transceiver coupled to a server antenna having a transmit portion and a receive portion; a modem, coupled to the donor transceiver and the server transceiver, the modem performing the steps comprising; registering the RF repeater with a base transceiver station (BTS); calibrating uplink output levels of a donor RF transceiver and storing output level values; synchronizing to a BTS transmission received at the donor RF transceiver; providing synchronization information to a server RF transceiver of the repeater; performing isolation detection and measurement between donor transmit antenna and receive server antenna of the RF repeater; and adjusting automatic gain control parameters of donor RF transceiver and server RF transceiver based upon the isolation detection and measurement value. - View Dependent Claims (18, 19, 20)
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Specification