This paper describes the implementation of a scanning signal detector and automatic modulation classification system. The classification technique is a completely blind method, with no prior knowledge of the signal’s center frequency, bandwidth, or symbol rate. An energy detector forms the initial approximations of the signal parameters. The energy detector used in the wideband sweep is reused ...

nowadays, in the modern wars, radars have faced with many threats. therefore, low probability of interception (lpi) capability is considered as an important factor in military radars. on the other hand, research on the interception of their signals is started and so far several methods are presented for detection of these signals. by using of time-frequency techniques, we can estimate signal pa...

The CMOS PLL based Frequency Synthesizer is a vital role in Receiver front end Sub component. The main objective of this paper is to design a high frequency of oscillation, less phase noise and power efficient PLL. In general, the PLL contains PFD, Loop Filter, VCO and Frequency Divider. The VCO is a critical component in Phase Locked Loop for low power CMOS designs. Here the Source Coupled VCO...

INTRODUCTION.The RATIO DETECTOR uses a double-tuned transformer to convert the instantaneous frequency variations of the fm input signal to instantaneous amplitude.AM version is shown at A to make it a CWSSB receiver, change the detector to a. 4An FM ratio detector of the type mentioned in the text. It is similar to the.Ratio detector or discriminator was widely used for FM demodulation within ...

Pulsars are a form of variable celestial source that have shown to be usable as aids for autonomous, deep space navigation. Particulary those sources emitting in the X-ray band are ideal for navigation due to smaller detector sizes. In this paper X-ray photons arriving from a pulsar are modeled as a non-homogeneous Poisson process. The method of pulse phase tracking is then investigated as a te...

Two phase frequency detectors (PFDs) are proposed in this paper that can overcome the speed and area limitations of conventional PFD. The AND gate based PFD uses 22 transistors. It consumes 161.41uW power when operating at 50MHz clock frequency with 1.8V supply voltage. The NOR gate based PFD uses 20 transistors and preserves the main characteristics of conventional PFD. It consumes 96.67uW pow...

In this paper , a dual-slope phase frequency detector and charge pump architecture for fast locking of PLL is proposed and analyzed. The proposed PLL circuit is designed based on the 0.11um CMOS process with 1.2V supply voltage. The modified delay cell circuit of Ring Oscillator is used in the design of VCO and the frequency range of VCO is from 23MHz to 522MHz. This frequency synthesizer has a...

We present a method by which the effect of laser field variations on the signal output of an interferometric gravitational wave detector is rigorously determined. Using the Laser Interferometer Gravitational Wave Observatory (LIGO) optical configuration of a power recycled Michelson interferometer with Fabry-Perot arm cavities as an example, we calculate the excess noise after the input filter ...

An ASIC design of Dual Edge Triggered Phase Detector(DET PD) for Delay locked loop(DLL) and Phase locked loop(PLL) applications is proposed in this paper.The proposed DET PD has high locking speed and less jitter. The designs are based on TSPC flip flop logic, which overcomes the issue of narrow capture range. The Double edge triggered phase detector dissipates less power than conventional desi...