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 that includes a modem device, in a time-division-multiplexed (TDD) system, 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;
adjusting the RF output level of a donor RF transceiver,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 via said modem device;
performing isolation detection and measurement between a donor transmit antenna and a receive server antenna of the RF repeater via said modem device; and
adjusting automatic gain control parameters of the donor RF transceiver and the server RF transceiver based upon the isolation detection and measurement value via said modem device.
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.
6 Citations
21 Claims
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1. A method of establishing and maintaining isolation status of a radio frequency (RF) repeater that includes a modem device, in a time-division-multiplexed (TDD) system, 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; adjusting the RF output level of a donor RF transceiver, 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 via said modem device; performing isolation detection and measurement between a donor transmit antenna and a receive server antenna of the RF repeater via said modem device; and adjusting automatic gain control parameters of the donor RF transceiver and the server RF transceiver based upon the isolation detection and measurement value via said modem device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of establishing and maintaining isolation status of a radio frequency (RF) repeater that includes a modem device, in a time-division-duplexed (TDD) system, the method comprising:
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registering the RF repeater with a base transceiver station (BTS); adjusting the RF level of a donor RF transceiver; synchronizing said modem device to a BTS transmission received at the donor RF transceiver; providing synchronization information to a server RF transceiver of the repeater via said modem device; and performing isolation detection and measurement between donor transmit antenna and receive server antenna of the RF repeater via said modem device; and adjusting automatic gain control parameter of donor RF transceiver and server RF transceiver based upon the isolation detection and measurement value via said modem device. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A radio frequency (RF) repeater that includes a modem device, for use in a time-division-duplexed (TDD) system, 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); adjusting the RF levels of a donor RF transceiver and storing output level values; 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 via said modem device; performing isolation detection and measurement between donor transmit antenna and receive server antenna of the RF repeater via said modem device; and adjusting automatic gain control parameters of donor RF transceiver and server RF transceiver based upon the isolation detection and measurement value via said modem device. - View Dependent Claims (19, 20, 21)
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Specification