Accession Number : ADA303432

Title :   Phase Noise Cancellation in a Mixer Circuit: Analysis Using a Random Phase Function.

Descriptive Note : Technical rept.,

Corporate Author : ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER PICATINNY ARSENAL N J FIRE SUPPORT ARMAMENT CENTER

Personal Author(s) : Podesta, John J.

PDF Url : ADA303432

Report Date : JAN 1996

Pagination or Media Count : 48

Abstract : A stochastic signal model is used to study the phase noise suppression in an ideal mixer circuit. The phase noise in a harmonic oscillator is modeled by a sinewave containing a random phase term. The random phase term is a random walk stochastic process. The problem is to calculate the phase noise reduction (i.e., the decrease in sideband power) which occurs when the oscillator signal is coherently mixed with a time delay replica of itself. The results confirm the validity of the well know engineering formula for the phase noise reduction as a function of the time delay. An improved formula is also obtained. Although the results are derived for a pure sinusoidal oscillator, the same analysis can also be applied to modulated signals such as FMCW, etc.

Descriptors :   *NOISE REDUCTION, *NOISE(RADAR), MATHEMATICAL MODELS, SIGNAL PROCESSING, TIME INTERVALS, STOCHASTIC PROCESSES, VALIDATION, AUTOCORRELATION, RADAR SIGNALS, REPLICAS, CANCELLATION, PHASE MODULATION, LOCAL OSCILLATORS, HARMONIC GENERATORS, RANDOM WALK, COHERENT RADAR.

Subject Categories : Active & Passive Radar Detection & Equipment
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE