A load balancing system for dynamic balancing of load between sectors of a sectored cellular base station, comprises a plurality of repeaters with local coverage in the sectors, and a switching matrix, for associating between the repeaters and the base station, and for allowing the repeaters to be switched between d...

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. samp...