this paper proposes a new method for parameter estimation of distorted single phase signals, through an improved demodulation-based phase tracking incorporated with a frequency adaptation mechanism. the simulation results demonstrate the superiority of the proposed method compared to the conventional sogi (second-order generalized integrator)-based approach, in spite of the dc-offset and harmon...

In a conventional radar receiver errors are introduced due to mismatch between the ADCs and gain and phase mismatch in the I/Q demodulation. By performing the I/Q demodulation in the digital domain some of these errors are alleviated. In this paper several different filter structures suitable for digital I/Q demodulation are evaluated. Three different structures for such a digital down converte...

Analysis of amplitude and phase characteristics for delta, theta, and alpha bands at localized time instant from EEG signals is important for the characterizing information processing in the brain. In this paper, complex demodulation method was used to analyze EEG (Electroencephalographic) signal, particularly for auditory evoked potential response signal, with sufficient time resolution and de...

Direct discrimination of FM and FSK optical signals using injection-locked DFB semiconductor lasers is analysed. The demodulation eficiency is found to be independent of the optical injection level in the steady state. However, the optical injection level is important in determining the dynamic response. There exists an optimum optical injection rate to achieve the highest demodulation speed. T...

A single sideband (SSB) demodulation method is described, in which frequency mixing is not required. The proposed method is based on the phase shift method, but no local oscillator is employed. The IQ demodulator is replaced with an envelope detector and an FM demodulator. It can replace the synchronous demodulation method, whch requires an expensive phase-locked loop for carrier recovery. Not ...

This work presents a generalization of the Principal Component Analysis (PCA) demodulation approach that is renamed as Quadrature Component Analysis. We show a new and general mathematical analysis of this demodulation algorithm and we demonstrate that this method is not affected by the number of fringes limitation. Additionally, we show that any asynchronous phase-shifting demodulation method ...

The following methods of CPFSK signals demodulation are compared for phase and polarization diversity receivers: single filter, dual filter, delay and multiply. BER values are obtained in each case showing that for negligible laser linewidths the delay demodulation method outperforms the dual-filter method by approximately 3 dB, and the single-filter method by 6 dB. Since the noise bandwidth fo...

In this paper, an optimized programmable demodulation scheme suitable for M-PSK/16QAM signals is proposed. The scheme adopts the conception of component reuse by exploring the demodulation structures of M-PSK and 16QAM respectively. The carrier phase recovery circuit uses the reduced complexity Costas loop. The symbol timing synchronization circuit adopts Gardner loop with offset cancellation. ...

Abstract. This paper describes a new technique for the demodulation of Sagnac fiber optic gyroscopes, based on the zero-crossing technique. The technique uses a digital approach with a quasi-synchronous clock, which allows for the implementation of very high resolution and low cost gyroscope demodulation circuits. The proposed demodulation circuit was tested in laboratory, using a emulated gyro...