Abstract:
A directional sensing algorithm is proposed employing
doppler radar and low-complexity 2-D IIR spatially bandpass
filters. The speed of the scatterer is determined by the
frequency shift of the received signal following down-conversion.
The downconversion is done by mixing it with the instantaneous
transmitted signal. The direction of the scatterer is determined by
the means of 2-D plane-wave spectral characteristics, using 2-D
IIR beam filters. The proposed architecture was simulated for
three scatterers at 10,o 30,o 60o from array broadside, traveling
at speeds of 31 ms,−1 18 ms−1 and 27 ms−1, respectively. A
doppler radar module was used to transmit and receive reflected
signals, that has a carrier frequency of 2.4 GHz. Simulations
show both direction and doppler information being enhanced.
