Process of human body target tracking based on wireless pyroelectric infrared（ PIR） sensor can be divided into five steps

which are event detection

event digitalization

event registration

target location and trajectory estimation. Research direction is mainly focused on data collection and signal processing in event detection process

region-segmentation coding in event registration

data processing in target location

as well as data fusion and trajectory prediction in trajectory estimation. Illustrate realization principles of side-view sensing mode

and top-view sensing mode

analyze method for solving main problems and compare experimental results of the two kinds of sensing modes

analyze the advantages and disadvantages of two sensing modes and discuss improving direction according to the analysis.