Time-delay transmit diversity add-on to a multicarrier base transceiver system
First Claim
1. A base station system for implementing forward link delay diversity in a multicarrier wireless communication system, comprising:
- a base station transceiver system configured to generate multicarrier transmit signals;
a directional coupling mechanism configured to sample and combine the multicarrier transmit signals from said base station transceiver system to produce a composite multicarrier transmit signal;
a delay mechanism configured to introduce a predetermined delay into the composite multicarrier transmit signal; and
a plurality of antenna arrangements, wherein the plurality of antenna arrangements includes at least two antenna arrangements that radiate the multicarrier transmit signals generated by said base station transceiver system and at least one antenna arrangement that radiates the delayed composite multicarrier transmit signal in order to provide forward link delay diversity.
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Accused Products
Abstract
At least two passive antenna arrays of an existing multicarrier base station transceiver system are supplemented by an auxiliary antenna array to provide a system and method of enhancing reverse link sensitivity and reducing the effects of multipath fading in a wireless communication system without the need for modifications to the mobile station. The auxiliary antenna array provides a complementary transmit diversity path for the two passive antennas such that a predetermined time delay is implemented to a composite transmit signal and the delayed composite transmit signal is fed directly to the auxiliary antenna array. The delayed signal and the signals from the passive antenna arrays provide a reduced noise figure and time delay transmit diversity for the multicarrier BTS operation.
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Citations
23 Claims
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1. A base station system for implementing forward link delay diversity in a multicarrier wireless communication system, comprising:
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a base station transceiver system configured to generate multicarrier transmit signals;
a directional coupling mechanism configured to sample and combine the multicarrier transmit signals from said base station transceiver system to produce a composite multicarrier transmit signal;
a delay mechanism configured to introduce a predetermined delay into the composite multicarrier transmit signal; and
a plurality of antenna arrangements, wherein the plurality of antenna arrangements includes at least two antenna arrangements that radiate the multicarrier transmit signals generated by said base station transceiver system and at least one antenna arrangement that radiates the delayed composite multicarrier transmit signal in order to provide forward link delay diversity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of implementing forward link delay diversity in a multicarrier wireless communication system, comprising:
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supplementing a plurality of antenna arrangements of a base station transceiver system with an auxiliary antenna array;
generating multicarrier transmit signals at the base station transceiver system;
combining the multicarrier transmit signals from the base station transceiver system to produce a composite multicarrier transmit signal; and
implementing a predetermined delay to the composite multicarrier transmit signal to produce a delayed composite high-power transmit signal, wherein the plurality of antenna arrangements includes at least two antenna arrangements that radiate the multicarrier transmit signals generated by the base station transceiver system and at least one antenna arrangement that radiates the delayed composite multicarrier transmit signal in order to provide forward link delay diversity. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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Specification