Transmit diversity fo base stations
First Claim
1. Upgrading apparatus for obtaining a transmit diversity signal for transmission alongside a main R.F. signal using at least one antenna, the apparatus comprising:
- an R.F. operable signal extractor for extracting a sample of said R.F. main signal, and an R.F. operable diversity unit for transforming said R.F. sample signal thereby to form said transmit diversity signal, said apparatus being configured for insertion between at least one R.F. output of an existing cellular base station and a passive diversity antenna, said main R.F. signal being obtained from said R.F. output, thereby to confer upon said existing cellular base station a transmit diversity capability.
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Accused Products
Abstract
A method and corresponding upgrade kit, for enhancing a base station (10) having a CDMA air interface and a passive antenna (12) with receive space diversity capability so as to provide the base station with transmit diversity capability. The method comprises attaching a radio frequency interface unit to an R.F. output of the base station to obtain a sample of a main R.F. signal, attaching a diversity unit (20) to the radio frequency interface unit to generate a transmit diversity signal, and connecting the diversity unit to the passive antenna to transmit the transmit diversity signal.
96 Citations
40 Claims
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1. Upgrading apparatus for obtaining a transmit diversity signal for transmission alongside a main R.F. signal using at least one antenna, the apparatus comprising:
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an R.F. operable signal extractor for extracting a sample of said R.F. main signal, and an R.F. operable diversity unit for transforming said R.F. sample signal thereby to form said transmit diversity signal, said apparatus being configured for insertion between at least one R.F. output of an existing cellular base station and a passive diversity antenna, said main R.F. signal being obtained from said R.F. output, thereby to confer upon said existing cellular base station a transmit diversity capability. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A method of enhancing a base station having a CDMA air interface with receive space diversity capability so as to provide said base station with transmit diversity capability, the method comprising:
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attaching a radio frequency interface unit to an R.F. output of said base station to obtain a sample of a main R.F. signal, attaching a diversity unit to said radio frequency interface unit to generate a transmit diversity signal, and connecting said diversity unit to a diversity antenna of said base station to transmit said transmit diversity signal. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification