Patent ID: 8279113

Claim:
A method for use in a radar for filtering a received signal, the received signal being a signal emitted by the radar and reflected by a target, the target being at a location corresponding to an n th range resolution cell of the radar, the method comprising the following steps: transmitting a sampled signal s=[s 0 . . . s N−1 ] T containing N samples in a range dimension, N being an integer greater than or equal to 1, the sampled signal s satisfying s=z+d where z=[z 0 . . . z N−1 ] T is a reference template signal and d=[d 0 . . . d N−1 ] T is unwanted distortion; using the radar to receive a signal y, the signal y being a sampled signal {tilde over (y)}(n)=[y(n) . . . y(n+N−1)] T containing N samples corresponding to a measurement of the signal y in N consecutive resolution cells following the n th cell; and applying a filter w to the signal y, w being a set of N weighting factors, wherein w is applied to y by calculating the convolution w H {tilde over (y)}(n); wherein determining the filter w comprises performing the following steps M times, M being an integer greater than or equal to 1 and p being an integer ranging from 1 to M: a step S 1 of calculating, based on an estimated distortion d (p−1) , a reference signal s (p) ; a step S 2 of calculating, based on s (p) , an estimated filter w (p) ; and a step S 3 of calculating, based on w (p) , an estimated distortion d (p) ; the M th iteration of S 3 providing w (M) =w.