Pulse radar apparatus

Claim 1

Pulse radar apparatus comprising a transmitter and receiver, whereby the target returns - after detection - are sampled and digitised per range quant, an n-point FFT processing unit, and a threshold circuit for determining a threshold value for each of the n frequency output channels of the FFT processing unit, above which threshold value the output signals of the FFT processing unit are passed, characterised in that a cell classification unit, connected to the threshold circuit, is provided for deriving from the spectrum of the target returns processed per radar cell a cell classification signal (FQ), whose logical values indicate that the target returns within such a cell are classified, in the first instance, to be from a moving target or from a fixed target, while a microprocessor is further provided, comprising: means for combining the cells which collectively cover one single target to form a cluster and for determining a signal representative of the target covered by the cluster; means for deriving, from the cell classification signals of the cluster cells, a cluster classification signal (CLUC), whose logical values indicate that the target returns within the cluster are classified to be from a moving target or from a fixed target; and means for reading the signal representative of the target covered by the cluster out of the microprocessor with the use of the cluster classification signal, in so far as the read-out signal is derived from target returns classified to be from moving targets.