Nonlinear amplitude detector

Details Nonlinear amplitude detector Nonlinear amplitude detector

1979-12-19

1981-11-03

Smith, Jerry

Boots, shoes, and leggings

328144, 343 5NQ, 364752, G06F 1520, G06F 7552

Patent

active

042989426

ABSTRACT:
A nonlinear amplitude detector generates signal amplitude from the signal's inphase and quadrature components based on a Binomial series expansion. The amplitude detector significantly reduces the processing requirement from an ideal square root operation and yet provides much improved error performance over a conventionally used linear amplitude detector. In operation, the inphase and quadrature signal components are compared for relative magnitude and the smaller magnitude signal component is squared and divided by the large magnitude signal component. The quotient from this operation is multiplied by a coefficient that is selected to provide desired amplitude error deviation characteristics. Signal amplitude is then determined by summing this product with the larger magnitude signal component.

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patent: 3858036 (1974-12-01), Lunsford
patent: 4079329 (1978-03-01), England et al.
patent: 4173017 (1979-10-01), Burlage et al.

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