Patent ID: 7327990
Filing Date: 2008-02-05
Classification: H04B,H04W,Y02D

Abstract:
1. A reception diversity system comprising a wireless apparatus including an RF unit which amplifies radio waves respectively received by antennas with reception gains respectively set for systems and demodulates the radio waves to output analog reception signals, an analog signal processing unit which A/D-converts the respective analog reception signals from said RF unit for the respective systems and outputs the signals as digital reception signals, a digital signal processing unit which decodes and combines the respective digital reception signals from said analog signal processing unit to output desired reception information, sequentially adjusts a reception gain of each system in said RF unit on the basis of a reception level of each of the digital reception signals, and stores an arbitrary reception gain used for the adjustment, and a control unit which controls said RF unit, said analog signal processing unit, and said digital signal processing unit, wherein said control unit operates only a predetermined system of the respective systems while stopping the remaining systems for at least each intermittent operation period in intermittent reception operation of said RF unit, and stops all the systems in an intermittent stop period in the intermittent reception operation, and said digital signal processing unit sets, in said RF unit, an initial reception gain estimated from an arbitrary past reception gain used in a past intermittent operation period as a first reception gain in a new system which is operated in accordance with arrival of a next intermittent operation period, thereby performing switching control of a plurality of systems which respectively demodulate received radio waves, and obtaining desired reception data.