Method, apparatus, and systems for wireless event detection and monitoring

An apparatus for detecting a plurality of events, comprising:

• a processor;
• a storage device storing a set of instructions that when executed by the processor cause the processor to:
• train at least one classifier configured to classify channel state information and detect an event based on the classification of the channel state information, in which the training of the at least one classifier includes:
• for each of a plurality of known events to be detected by the apparatus, during a time period in which the known event occurs in a venue, obtain at least one set of training channel state information (CSI) of a wireless multipath channel between a wireless transmitter and a wireless receiver in the venue, in which the at least one set of training channel state information is derived from at least one first probing signal sent from the wireless transmitter through the wireless multipath channel to the wireless receiver, and
• train the at least one classifier based on the plurality of known events and the at least one set of training channel state information associated with each of the plurality of events;
• during a period when a current event is occurring, receive a set of measured channel state information of a wireless multipath channel between the wireless transmitter and the wireless receiver, in which the set of measured channel state information is derived from at least one second probing signal sent from the wireless transmitter through a wireless multipath channel and received at the wireless receiver;
• and
• apply the classifier to at least one of the set of measured channel state information or data derived from the set of measured channel state information to determine which of the known events matches the current event;
• wherein each of the wireless transmitter and the wireless receiver has at least one antenna,
• wherein each set of training channel state information is derived from one of the at least one first probing signal sent through a wireless multipath channel from one of the at least one wireless transmitter antenna to one of the at least one wireless receiver antenna during a time period in which one of the known events occurs, and
• wherein each set of measured channel state information is derived from one of the at least one second probing signal sent through a wireless multipath channel from one of the at least one wireless transmitter antenna to one of the at least one wireless receiver antenna.