Complex Filters, Convolvers, and Multipliers.
DEPARTMENT OF THE NAVY WASHINGTON DC
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Many signal processing systems require complex multiplications, complex filters, complex convolutions, or complex cross-correlations. Such applications include sonars, radars, frequency-domain beamformers, and image-processing transform apparatus. As the real multipliers, filters, or corss-convolvers used to implement the corresponding complex operations tend to be relatively high-cost components in terms of dollars, power dissipation, etc., either for the device itself or for the associated driver amplifiers or clock generators, it is desirable to minimize the number of real multipliers, filters, or convolvers used to implement the corresponding complex operation. The complex multipliers, complex filters, and complex-cross convolvers, of this invention require only three real multipliers, three real filters, or three real cross-convolvers, respectively, rather than the usual four. This results in an overall reduction of system size, cost, and power dissipation.
- Electrical and Electronic Equipment