Traffic condition monitoring system, method, and storage medium

A traffic condition monitoring system provided in a base station installed by a side of a road for monitoring a traffic condition based upon communication signals transmitted from mobile terminals of a plurality of vehicles traveling on the road, the system comprising:

• a receiver part operable to receive the communication signals transmitted from the mobile terminals of the respective vehicles to output received signals;
• a speed/direction estimation part operable to estimate traveling speeds and traveling directions of the respective vehicles based upon frequency shifts estimated from the received signals;
• and
• a traffic condition analysis part operable to determine effective traveling speeds of the respective vehicles in each traveling direction, to calculate an average traveling speed of a group of vehicles in each traveling direction, and to analyze a traffic condition in each traveling direction based upon the average traveling speed of the group of vehicles in each traveling direction, wherein the receiver part includes:
• first to Mth array antennas including M antenna elements where M is an integer not less than 2;
• and
• first to Mth radio receiver parts operable to convert first to Mth radio signals received by the first to Mth array antennas into first to Mth baseband signals and to output the first to Mth baseband signals as the received signals.