An efficient, stable and reliable system to detect the unknown phase of the input sinusoidal signal is presented. The proposed design is a feedback loop consists of subtractor, peak detector and direct digital synthesizer (DDS). DDS generates a sinusoidal signal with the same frequency of input signal and with initial zero phase. An error signal is the output of subtracor after subtracting DDS ...

Electromagnetic phase measurement is a key measurement technology in optical communication as well as in microwave photonics. The present lecture re-examines recent progress in electromagnetic phase control and its relevance to future communication systems. Electromagnetic phase measurement and regulation techniques are presented while tracing a path through a communication system from transmit...

The nonlinear distortion of a PLL frequency discriminator is addressed using the Volterra Series approach. The analysis, made entirely in the frequency domain, allows distortion calculations for periodic and non-periodic sets of discrete excitation frequencies and random inputs. It also includes, simultaneously, the two major sources of nonlinearity: Phase Detector and VCO.

in this paper, a ground early warning receiver is introduced and explained for the reception and monitoring of signal from a space-borne synthetic aperture radar. this receiver can be used for various electronic warfare applications and implemented in two sectors of time parameter detector and frequency parameter detector. it can measure power, bandwidth, central frequency, pulse width, pulse r...

This paper describes a delta-sigma ( A-Z ) modulation and fractional-S frequency division technique to perform indirect digital frequency synthesis based on the use of a phaselocked loop (PLL). The use of 1 Y modulation concepts results in a beneficial noise shaping of the phase noise (jitter) introduced by fractional-S division. The technique has the potential to provide low phase noise, fast ...

Phase-measurement interferometry (PM!) techniques enable quantitative measurements to be performed in optical testing, holographic interferometry, and speckle metrology. This paper will present results of error analyses of the most common errors in phase-measurement techniques. These errors include miscalibrated and nonlinear phase shifters, detector nonlinearities, detection quantization, vibr...

In this paper a new variety of the digitized version of an analog phase locked loop has been proposed in order to overcome the conditionally stable nature of a software controlled phase locked loop. Also the conventional need of a low pass filter to filter out the high frequency components at the output of a phase detector is avoided through the use of In-phase and Quadrature signals. MATLAB si...

Abstract  In this paper, the bit error rate of a recently proposed modified minimum mean squared error (MMSE) detector in Rayleigh flat fading channels is improved. It is also shown that the new detector is less sensitive to changes in the number of users. This improved detector is then adapted for use in a Rayleigh faded frequency-selective channel. An asynchronous binary phase shift keying (...

We report a 1.5- mum band polarization independent single photon detector based on frequency up-conversion in periodically poled lithium niobate (PPLN) waveguides. To overcome the polarization dependence of the PPLN waveguides, we employed a polarization diversity configuration composed of two up-conversion detectors connected with a polarization beam splitter. We experimentally confirmed polar...