Patent · US Expired

Reference frequency spur cancellation in synthesized measurement receivers

US6384589B1 · kind B1 · utility

6Cited by

2References

3Claims

0Family size

Assignee

Tektronix, Inc. · US

Inventors

Linley F. Gumm · Beaverton, US
Thomas L. Kuntz · Portland, US
Xiaofen Chen · West Linn, US

Key dates

Filing date	Apr 4, 2001
Grant date	May 7, 2002
Priority date	—
Expiry date	Apr 4, 2021

Classification

Technology area (CPC H)Electricity
CPC primaryH04L27/0002
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

Reference frequency spur cancellation in a synthesized measurement receiver is achieved by determining for any given frequency to which the receiver is tuned a list of integer multipliers of the reference frequency that produce spurious signals in the receiver's passband. For those values the amplitude and phase for each spurious signal is determined in the digital domain and subtracted from the digital signal from the receiver. The reference frequency is then offset slightly and the measurement repeated. The maximum values between each measurement are combined to produce a measurement for the input signal without spurious signals.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.