Most of the near-field source localization methods are developed with approximated signal model, because phases received highly non-linear. Nevertheless, model based suffer from mismatch and performance degradation while exact estimation usually involve parameter searching or multiple decomposition procedures. In this paper, a search-free method is proposed model. Firstly, approximative estimat...

At present, microseismic technology is a widely used method for monitoring the rock burst phenomenon during construction of deep-buried tunnels. The fracture in tunnel will generate seismic waves. wave has strong randomness and low energy usually mixed with environmental noise, which called signal. signal received by geophone contain other noises. So, there an urgent need algorithm that can qui...

In this paper, a new RF/Microwave source is presented. This source is able to generate a Continuous Waveform (CW) signal as well as a modulated signal like GFSK for Bluetooth and GMSK for GSM. The RF source presented here is based on a direct modulation All-Digital Phase-Locked-Loop (ADPLL) architecture that was originally designed for a Bluetooth transmitter in the 2.4GHz in industry, science,...

In this paper, we investigate the importance of the high frequencies in the problem of convolutive blind source separation (BSS) of speech signals. In particular, we focus on frequency domain blind source separation (FD-BSS), and show that when separation is performed in the low frequency bins only, the recovered signals are similar in quality to those extracted when all frequencies are taken i...

the analytic signal for magnetic anomalies was initially defined as a “complex field deriving from a complex potential” (nabighian, 1972). this function can be computed easily in the frequency domain, its real part is the horizontal derivative of the field and its imaginary part is the vertical derivative. analytic signal processing and interpretation requires few initial assumptions regarding ...