Patent ID: 8228840
Filing Date: 2012-07-24
Classification: H01Q,H04B

Abstract:
1. A method for reducing the number of feeders between a radio base station and a diversity antenna system at a base station site of a frequency divided mobile cellular system with sectorized cells, the diversity antenna system comprising combinations of antennas for transmitting and receiving in a respective cell sector, each such antenna combination comprising at least two branches for providing diversity, an operator of said cellular system being assigned a predefined operator frequency band which in its turn is divided into a plurality of bands, each for transmitting and receiving, the method comprising: assigning each sector one RX band and one TX band, dividing the assigned TX bands into one or more sub bands so as to provide two or more diversity branches, branch-wise diplexing the TX bands assigned to the sectors of a branch so that in each sector of a branch, signals are transmitted on the TX band assigned to this sector, sector-wise combining signals received in a sector's own assigned RX band with signals received in the other sectors at the same branch, and transmitting the diplexed TX signals and receiving the combined RX signals in all sectors of a branch on a single feeder.