Transmit diversity fo base stations
OwnerGideon Argaman, Paul Lemson +2inventors
InventorsGideon Argaman, Paul Lemson, Shmuel Miller, Joseph Shapira
Life of this patent
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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.
Claims40
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.
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:
- 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.
Dependencies are inferred from the claim text.