Cordic complex multiplier

Details Cordic complex multiplier Cordic complex multiplier

1988-05-31

1990-01-23

Harkcom, Gary V.

Boots, shoes, and leggings

G06F 752

Patent

active

048962872

ABSTRACT:
A CORDIC (COordinate Rotation DIgital Computer) subsystem for multiplication of two complex digital numbers B and C, where one number is the sum of real and imaginary data portions, expressed in rectangular form (say C.sub.r or C.sub.I), and the other number can be expressed in the rectangular form or can be represented by magnitude data, expressed in polar form (say, .vertline.B.vertline., .phi.). An N-stage CORDIC portion of either recursive or pipeline sequential form, but devoid of multipliers, is used to rotate the I and Q terms of the first number through a phase angle .phi. of the polar-form multiplier number of the equivalent, taken from the rectangular form. The final computed data are the real and imaginary parts of the product.

REFERENCES:
patent: 3868680 (1975-02-01), Rhodes
patent: 3926367 (1975-12-01), Bond et al.
patent: 4231102 (1980-10-01), Barr et al.
patent: 4344151 (1982-08-01), White
patent: 4354249 (1982-10-01), King et al.
patent: 4680727 (1987-07-01), White
patent: 4769779 (1988-09-01), Chang et al.
The Cordic Trigonometric Computing Technique, Volder, IRE Transactions on ELectric Computers, Sep., EC-8, pp. 330-334 (1959).

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