Title:
IN-PHASE COMBINATION SPACE DIVERSITY RECEIVER
Document Type and Number:
Japanese Patent JPH1117596
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To avoid effect at an inverse phase point of a dead band provided to improve noise improvement and improve a control speed for in-phase combination control in the in-phase combination space diversity receiver where a lead/ lag is discriminated based on a phase difference of two reception input signals so as to control the phase difference when both input signals are put together. SOLUTION: When a phase relation of two reception input signals S1, S2 is discriminated to be in an inverted phase range (90 deg.<Δθ<270 deg.) by a 2nd phase difference discrimination means 24, a phase shift amount control means 25 receiving the discrimination signal controls a phase shift means 21 to change the phase shift amount of the phase shift means by 180 deg. at that point of time. The phase control based on the discrimination result of the 1st phase difference discrimination means 23 is conducted always within an in-phase range (-90 deg.<Δθ<90 deg.), the effect of a dead band in an inverse phase point is not received and even in the case of phase control near an inverted phase with a high phase difference is converted to the in phase point at a high speed.
Inventors:
ATSUTA HIROSADA
Application Number:
JP16305397A
Publication Date:
January 22, 1999
Filing Date:
June 19, 1997
Export Citation:
Assignee:
NEC CORP
International Classes:
H04B7/08; (IPC1-7): H04B7/08