Signal processing of indoor intrusion detection and estimation

In this paper a new RF (Radio Frequency) intrusion detection system has been descried. It uses one or few RF transmitters that emit RF into the space, then strategically place a number of RF receivers at a few locations, RF signals are captured and processed using digital algorithms that will be developed in the space. The situation is a bit like ultrasound detector but the RF signals will have a much better clarity due to higher frequency. When there is no intrusion, the signal pattern from those RF receivers will exhibit a consistent pattern. If there is an intrusion, even the direct path is not obstructed, the reflected paths are definitely affected and hence the signals captured will change. Hence, theoretically, there is no blind spot in this kind of detection system, which gives a truly gapless indoor intrusion detection system.