Method and device for distance ambiguity resolution applied particularly to a frequency hopping radar

摘要

The procedure for calculating distance to detected targets sensed by a radar system includes use of several estimation functions (21-23). When the estimation functions give practically the same result for the measurement of distance, the targets are defined as being within a non-ambiguous range of distances. When the estimation functions give different results, the targets are defined as being with an ambiguous range of distance. The estimation functions are based on the use of up to four different frequencies of radar, each consisting of a base frequency plus an integer multiple of a frequency supplement. The estimation functions may be based on the phase difference between the difference signals obtained from pairs of received signals.