Complex Monopulse Processing, A Technoque For Hydrographic Mapping

The complex monopulse technique is a processing approach which uses simultaneous in-phase and quadrature data from two beams to obtain amplitude and angle information from the backscattered acoustic signal. This approach is advantageous for hydrographic applications because the algorithm´s simple implementation can allow rapid processing of the data. Another feature of this technique is that the imaginary part of the monopulse ratio provides a measure of the spatial coherence of the signal under consideration and, hence, can be used to edit the received signal in order to minimize the effects of interference due to multipath returns. In this paper, different implementations of the monopulse processing are examined and the resulting performances are presented.