초록 ▼

Apparatus for rejecting multipath reply signals received from a target transponder within a selectable time period, comprising: a top antenna and a bottom antenna to detect reply signals; means for determining an altitude code associated with each reply signal detected by the antennas respectively;

Apparatus for rejecting multipath reply signals received from a target transponder within a selectable time period, comprising: a top antenna and a bottom antenna to detect reply signals; means for determining an altitude code associated with each reply signal detected by the antennas respectively; means for determining a differential time of arrival (DTA) value for each reply signal detected by the antennas respectively; and processing means for: 1) producing, for each top antenna reply signal, a top antenna target report that includes the altitude code and DTA values; 2) producing for each bottom antenna reply signal, a bottom antenna target report that includes the altitude code and DTA data; and 3) comparing each top antenna report data with corresponding data from each bottom antenna report, and marking out each bottom antenna report that is a multipath reply based on such comparison.

대표청구항 ▼

A method for rejecting multiple reply signals received from a target transponder within a selectable time period, comprising the steps of: a. determining an angle of arrival (AOA) value for each reply signal using an antenna that produces, in response to said reply signals, phase related signals cor

A method for rejecting multiple reply signals received from a target transponder within a selectable time period, comprising the steps of: a. determining an angle of arrival (AOA) value for each reply signal using an antenna that produces, in response to said reply signals, phase related signals corresponding to target bearing; b. determining an altitude code associated with each reply signal; c. determining a differential time of arrival (DTA) value for each reply signal based on the difference between the time the reply signal was received and a predetermined reference time; d. producing, for each reply signal, a target report that includes said altitude code, AOA and DTA values; and e. comparing said altitude code, AOA and DTA data of an anchor target report with other target reports for matching, within defined limits, corresponding data of each other target report and said anchor target report to identify matched target reports and marking out such matched target reports as multiple replies from the target corresponding to the anchor target report.