Improvised K-Deep Relative Power Jump Processing for DFS Radar Signal Detection in 5 GHz U-NII Frequency Bands
Original Publication Date: 2004-Oct-21
Included in the Prior Art Database: 2004-Oct-21
This memo describes an improved method to detect the presence of radar signals for the purposes of utilizing an unlicensed 5 GHz band on a secondary-use basis in order to comply to mandate by most spectrum regulation bodies around the world. The primary use of these unlicensed bands are reserved for the incumbent radar community. Existing prior art developed so far utilizes a method by which the differential power jump between two sample measurements of received power is used to decide whether a radar signal is present. Indeed, this method results in an improved detection under certain conditions, such as, received pulse width, pulse BW, sampling rate, received signal strength, number of pulses processed, etc. The concepts described in this memo are simply an extension to existing method to improve the efficiency of detection (that is, in deciding whether the sample measurement indicates presence of a radar signal) of one-deep (or one measurement) correlation to an appropriate (to a particular situation) "K-deep" one; where, K = 1, 2, 3, . . . (sample measurements and/or pulses being sampled on) depending on the parameter-set (such as, PRF, number of pulses processed, sampling rate, pulse width of incoming radar signal, pulse BW or extent of band-limitation, received signal level, etc.). Initial simulation conducted resulted in significant improvement in radar detection over the conventional one-deep method.