Topic
Phase noise
About: Phase noise is a research topic. Over the lifetime, 25920 publications have been published within this topic receiving 355333 citations.
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24 Apr 1995
TL;DR: The influence of clock jitter in synchronized measurement systems (signal generator + data acquisition) on the quality of the measurements is studied and explicit expressions for the measurement errors are derived for sinusoidal phase noise.
Abstract: The influence of clock jitter (for example, phase noise) in synchronized measurement systems (signal generator + data acquisition) on the quality of the measurements is studied. Explicit expressions for the measurement errors are derived for sinusoidal phase noise. These expressions can be used to specify the required clock stability of data acquisition systems.
7 citations
09 Apr 2000
TL;DR: In this paper, an experimental scheme was developed to study medium noise properties at various off-track positions by projecting the measured noise onto the two leading noise modes: amplitude fluctuation and position jitter.
Abstract: An experimental scheme is developed to study medium noise properties at various off-track positions. Amplitude fluctuation and transition jitter are studied by projecting the measured noise onto the two leading noise modes: amplitude fluctuation and position jitter. Comparison with the directly measured waveform shows that these two modes well represent the actual amplitude and position fluctuations and that these two modes dominate the entire noise distribution. The magnitudes corresponding to both modes increase with off-track position. Off-track dependence of the power percentages from the two leading noise modes for dibit transitions is investigated in detail. This dependence is found to be influenced by the noise level of the disk as well as the sequence of the dibit pattern, i.e., Hard-Easy (HE) and Easy-Hard (EH).
7 citations
TL;DR: In the VCO core, in order to achieve the best phase noise and power consumption trade-off, an optimization method based on symbolic expressions is presented and a switchable bias current technique is proposed to achieve lower phase noise.
7 citations
TL;DR: In this paper, the maximum likelihood optimal MC-DPSK receiver is derived and synthesized using integrated-optic Mach-Zehnder delay interferometers, whose electrical outputs are interpreted as generalized Stokes' parameters.
Abstract: The recently introduced multichip differential phase-shift keying (MC-DPSK) optical transmission format, entailing the modulation of relative phases over a moving transmission window of successive chip intervals, is analytically and numerically analyzed. The maximum-likelihood optimal MC-DPSK receiver is derived and synthesized using integrated-optic Mach-Zehnder delay interferometers, whose electrical outputs are interpreted as generalized Stokes' parameters. The MC-DPSK performance over a nonlinear fiber channel, limited by the combination of amplified spontaneous emission noise and self-phase modulation, is further derived and simulated, demonstrating that the lowest complexity three-chip binary-phase MC-DPSK receiver provides an ~1-dB Q-factor advantage over conventional DPSK.
7 citations
TL;DR: It is found that the long-term phase stability of the master oscillator is well transferred to the opto-RF oscillator, even in the chaotic regime.
Abstract: A driven opto-RF oscillator, consisting of a dual-frequency laser (DFL) submitted to frequency-shifted feedback, is experimentally and numerically studied in a chaotic regime. Precise control of the reinjection strength and detuning permits isolation of a parameter region of bounded-phase chaos, where the opto-RF oscillator is frequency-locked to the master oscillator, in spite of chaotic phase and intensity oscillations. Robust experimental evidence of this synchronization regime is found, and phase noise spectra allow us to compare phase-locking and bounded-phase chaos regimes. In particular, it is found that the long-term phase stability of the master oscillator is well transferred to the opto-RF oscillator, even in the chaotic regime.
7 citations