Monitoring changes in an environment by means of communication devices

A method of monitoring changes in an environment by means of one or more communication devices, each of which is configured to receive a wireless communication signal transmitted from a source, the method conducted at a communication device comprising:

• receiving a wireless communication signal;
• performing channel equalisation on the received wireless communication signal to determine channel equalisation information;
• and,
• transmitting device data including the channel equalisation information to a central computing device for generating an estimate of the environment.

A system for monitoring changes in an environment by means of one or more communication devices, each of which is configured to receive a wireless communication signal transmitted from a source, the system comprising a central computing device which includes:

• a device data receiving component arranged to receive, from each communication device, device data including channel equalisation information, the channel equalisation information being determined by the device performing channel equalisation on a wireless communication signal received by the communication device;
• an estimate generating component arranged to use the received device data to generate an estimate of the environment;
• and,
• a recording component arranged to record changes in the generated estimate of the environment over time so as to monitor changes in the environment.