Patent ID: 6188879
Filing Date: 2001-02-13
Classification: H04B

Abstract:
A diversity receiving system comprising:an array of antenna systems for receiving modulated radio-frequency signals via a plurality of independent propagation paths and respectively recovering information signals from the modulated signals;a plurality of detectors connected respectively to said antenna systems for producing strength data indicating respective strengths of the information signals;a diversity switch;call processing circuitry connected to the diversity switch for establishing a connection from a transmit site;a diversity controller for selecting a highest strength signal from said information signals and controlling said diversity switch to supply the selected information signal to said call processing circuitry; anda memory having a plurality of locations respectively mapped to said antennas,said diversity controller being responsive to each connection established by said call processing circuitry for storing the strength data of the selected signal in a corresponding one of the memory locations, analyzing contents of the memory locations when a predetermined number of strength data are stored therein, generating an alarm indication of the whole array of antenna systems if none of said strength data exceeds a threshold value, and generating an alarm indication of the antenna mapped to a memory location which contains no strength data if at least one strength data exceeds the threshold value.