Patent ID: 6801758
Filing Date: 2004-10-05
Classification: H04B

Abstract:
A method of selecting a diversity branch from a list of pilot signals detected by and sent from a mobile station and informing said mobile station of identity of the selected diversity branch as an additional diversity branch, said pilot signals indicating their power levels and identities of diversity branches through which the pilot signals are respectively transmitted to said mobile station, the method comprising the steps of:a) storing diversity gain data in a first memory which indicates an amount to be gained when maximal ratio combining is performed on signals from intra-cell diversity branches and storing diversity gain data in a second memory which indicates an amount to be gained when selective combining is performed on signals from inter-cell diversity branches; b) determining whether the diversity branch of each pilot signal of said list is an intra-cell diversity branch or an inter-cell diversity branch; c) if the diversity branch of said each pilot signal is said intra-cell diversity branch, reading a diversity gain from said first memory and summing the read gain with the power level of said each pilot signal; d) if the diversity branch of said each pilot signal is said inter-cell diversity branch, reading a diversity gain from said second memory and summing the read gain with the power level of said each pilot signal; and e) selecting one of said diversity branches of said list corresponding to the highest of sums obtained by steps (c) and (d).