The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 01, 1998
Filed:
Feb. 24, 1997
John W Diehl, Elmhurst, IL (US);
Henry L Kazecki, Arlington Heights, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A complex constellation point multiplier (600) multiplies a complex number by a point in a digital modulation constellation. The desired constellation point is mapped to a digital control word. The complex number is connected to multiplicand input nodes (610, 615) and the digital control word is connected to control input nodes (620, 623, 626). Via logic gates (602, 603, 605, 606, 607, 609), the control word controls switches (651-658) and simple arithmetic blocks, such as accumulators (650, 659), scaler blocks (663, 665), and negation blocks (643, 646), to generate an output complex number that is the product of the input complex number and the constellation point. This complex constellation point multiplier provides a lower size and lower power-consumption alternative to traditional complex number multipliers.