RF signal repeater in mobile communications systems
First Claim
1. A signal repeater comprising:
- a receive antenna;
a receiver coupled to the receive antenna to receive radio frequency communication bursts from a mobile unit of a wireless mobile communications network;
a mixer to translate the carrier frequency of the received bursts;
a signal processor to tag the received bursts with a digital modulation identifying the signal repeater, the digital modulation being synchronous with the burst timing;
a transmit antenna; and
a transmitter coupled to the transmit antenna to transmit the frequency translated tagged bursts from the signal repeater to a base station of the wireless mobile communications network.
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Abstract
A RF signal repeater system is added to a wireless communications network which increases user data rates at the periphery of the cellular coverage area by boosting the downlink (base station to mobile user) signal and uplink (mobile user to base station) signal. The RF signal repeater system includes a signal tagging means that adds a unique electronic signature to the repeated signal such that position determination errors due to a non-line of sight propagation path can be corrected. The repeated signal is received and processed with a location measurement unit to determine the time of arrival and to extract the signal tag of the repeated signal. The time of arrival measurement and recovered signal tag are then processed at a mobile location center to determine the true position of the transmitter.
139 Citations
26 Claims
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1. A signal repeater comprising:
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a receive antenna;
a receiver coupled to the receive antenna to receive radio frequency communication bursts from a mobile unit of a wireless mobile communications network;
a mixer to translate the carrier frequency of the received bursts;
a signal processor to tag the received bursts with a digital modulation identifying the signal repeater, the digital modulation being synchronous with the burst timing;
a transmit antenna; and
a transmitter coupled to the transmit antenna to transmit the frequency translated tagged bursts from the signal repeater to a base station of the wireless mobile communications network. - View Dependent Claims (2, 3)
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4. A method of communication comprising:
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receiving at a signal repeater of a wireless mobile communications network, a communications burst from one of a base station of the wireless mobile communications network and a mobile unit of the wireless mobile communications network;
imposing a digital modulation on the received communications burst to identify the signal repeaters, the imposed modulation being synchronous with the burst timing; and
transmitting the modulation imposed burst from the signal repeater to the other of the base station and the mobile unit. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An apparatus comprising:
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means for receiving a radio frequency communication burst from one of a base station of a wireless mobile communications network and a mobile unit of the wireless mobile communications network;
means for tagging the received burst with digital modulation identifying a signal repeater, the digital modulation being synchronous with the burst timing; and
means for transmitting the tagged burst from the signal repeater to the other of the base station and the mobile unit. - View Dependent Claims (19, 20, 21)
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22. A signal repeater comprising:
- a receiver to receive radio frequency communication burst from one of a base station of a wireless mobile communications network and a mobile unit of the wireless mobile communications network;
a signal processor to tag the received communication burst with digital modulation identifying the signal repeater, the digital modulation being synchronous with the burst timing; and
a transmitter to transmit the tagged burst from the signal repeater to the other of the base station and the mobile unit. - View Dependent Claims (23, 24, 25, 26)
- a receiver to receive radio frequency communication burst from one of a base station of a wireless mobile communications network and a mobile unit of the wireless mobile communications network;
Specification