Nyquist folding receiver (NYFR) is a new kind of interception architecture, which can simultaneously intercept wideband signals in multi-Nyquist zones with one or two analog-to-digital converters (ADCs). A parameter estimation algorithm of the linear frequency modulated (LFM) signal intercepted by an improved NYFR is presented. Firstly, the NYFR is improved by introducing a synchronous mechanis...

The first experiment showing the effects of specific interaction forces using lateral force microscopy (LFM) was demonstrated for lectin-carbohydrate interactions some years ago. Such measurements are possible under the assumption that specific forces strongly dominate over the non-specific ones. However, obtaining quantitative results requires the complex and tedious calibration of a torsional...

Abstract Aiming at the problem of estimation hybrid modulated signal combining Binary Phase Shift Keying and Linear Frequency Modulation (LFM-BPSK), existing methods have low accuracy in SNR. To solve this problem, algorithm based on Born-Jordan time-frequency distribution (BJD) is proposed, which uses Hough transform (HT) to estimate initial frequency chirp rate LFM-BPSK signal, then estimates...

Linear frequency-modulated (LFM) pulse signals are probably the most common type of pulse compression waveforms for various radar systems (Barton, 2005; Cook&Bernfeld, 1967; Curlander & McDonough, 1991; Levanon & Mozeson, 2004; Richards, 2005; Skolnik, 2008). LFM signals are also often the waveform of choice for wideband systems, where the required bandwidth may be hundreds of megahertz. The am...

Learning from one's mistakes is an effective human learning technique where the learners focus more on topics were made, so as to deepen their understanding. In this paper, we investigate if strategy can be applied in machine learning. We propose a novel method called From Mistakes (LFM), wherein learner improves its ability learn by focusing during revision. formulate LFM three-stage optimizat...

Porcine Reproductive and Respiratory Syndrome Virus (PRRSV) infection of pregnant females causes fetal death and increased piglet mortality, but there is substantial variation in the extent of reproductive pathology between individual dams. This study used RNA-sequencing to characterize the whole blood transcriptional response to type 2 PRRSV in pregnant gilts during the first week of infection...

Unfortunately, traditional RF pulse measurements become less effective predictors of performance in radars that use pulse compression. For example, the width of an uncompressed radar pulse is directly related to spatial resolution. In contrast, the resolution depends on pulse width, chirp bandwidth and chirp linearity in a compressed radar system that uses linear frequency modulated (LFM) chirp...

Abstract: It is shown that replacing the sinusoidal chip in Golay complementary code pairs by special classes of waveforms that satisfy two conditions, symmetry/anti-symmetry and quazi-orthogonality in the convolution sense, renders the complementary codes immune to frequency selective fading and also allows for concatenating them in time using one frequency band/channel. This results in a zero...

In comparison to orthogonal frequency division multiplexing (OFDM), the OFDM linear modulation (OFDM-LFM) signal has similar time-bandwidth product, lower peak-to-average power ratio, and higher sensitivity Doppler shift, making it a promising candidate waveform for multiple-in multiple-out (MIMO) radar applications. However, OFDM-LFM is unsatisfactory in practical applications due challenges d...