Changchun Shi and Robert W. Brodersen

ISSCC 2004

Abstract:

Most existing analyses of quantization effects are given under the condition that all decision-making blocks, if exist in a system, produce identical decisions in both fixed-point and infinite-precision (IP) implementations. However, in doing floating-point to fixed-point conversion (FFC), a fixed-point design with occasional such decision errors may still be an acceptable approximation of the IP system. We study the effect of this decision error, and relate its probability to the fixedpoint data types. Our previous FFC methodology is then extended to include systems with possible decision errors due to quantization. The analysis is applied to both CORDIC and BPSK transceiver.

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