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Studies were performed in three aspects of radar system digital signal processors viz., (1) theoretical analysis of the quantization errors in fixed-point and floating-point realizations of quadrature channel processor, (2) simulation analysis of the processors, and (3) floating-point hardware considerations. These efforts included the effects of (1) the quantization errors of the quadrature channel analog-to-digital converters, (2) the finite word length coefficients used in the moving target indicator, (3) the vector magnitude approximation involved in the residue calculation, and (4) the truncation of products and/or sums. Numerous graphical presentations are given for the average value and variance of the error at the processor output.