This letter proposes a joint discrete Fourier transform (DFT)—estimation of signal parameters via rotational invariance techniques (ESPRIT) estimator for time-of-arrival (TOA) and direction-of-arrival (DOA) in vehicle frequency-modulated continuous-wave (FMCW) radars. Since the FMCW radar should recognize vehicles side/rear area when driver initiates lane change, estimation TOA/DOA between targets is an important issue solving complicated location tasks. However, conventional methods such as...

For an automotive pedestrian detection radar system, fast-ramp based 2D range-Doppler Frequency Modulated Continuous Wave (FMCW) is effective for distinguishing between moving targets and unwanted clutter. However, when a weak target such as exists together with strong clutter, the may be masked by side-lobe of clutter even though they are notably separated in Doppler dimension. To prevent this problem, one popular solution use windowing scheme weighting function. method leads to spread...

A low complexity range-azimuth frequency-modulated continuous-waveform (FMCW) radar sensor using joint angle and delay estimation method without singular value decomposition (SVD) eigenvalue (EVD) is presented in this paper. Conventional techniques exploit the dual-shift-invariant structure of received signals through matrix decompositions, such as SVD EVD, which increases computational burden. The proposed utilizes inversion performs extended one-dimensional pseudospectrum searching instead...

We propose a frequency-modulated continuous wave (FMCW) radar estimation algorithm with high resolution and low complexity. The fast Fourier transform (FFT)-based algorithms multiple signal classification (MUSIC) are used as for estimating target parameters in the FMCW systems. FFT-based MUSIC have tradeoff characteristics between performance While advantage of very complexity, they disadvantage low-resolution performance; that is, targets similar single target. On other hand, subspace-based...

A novel super-resolution angle estimation algorithm using low complexity-multiple signal classification (LC-MUSIC)-based relaxation (RELAX) for multiple-input multiple-output (MIMO) frequency-modulated continuous-wave (FMCW) radar is proposed in this paper. FMCW widely used to estimate target location information various fields, including autonomous driving, defense, and robotics. However, struggles provide high-resolution direction of arrival (DOA) data. To obtain precise positions,...

We propose a novel discrete Fourier transform (DFT)-based direction of arrival (DOA) estimation by virtual array extension using simple multiplications for frequency modulated continuous wave (FMCW) radar. DFT-based DOA is usually employed in radar systems because it provides the advantage low complexity real-time signal processing. In order to enhance resolution or decrease missing detection probability, essential have considerable number channel signals. However, due constraints space and...

In this paper, a novel equivalent circuit and modeling method for defected ground structure is proposed to design an optimized DGS lowpass filter circuit. The presented in paper has parallel capacitance explain the fringing fields due defects on metallic plane. Several comparisons between EM-simulations circuits simulations its are demonstrated show validity of model. Optimization carried out by using Simulation measurements fabricated passband stopband performance.

In this paper, we proposed an automotive radar signal processing scheme for target detection, tracking, and classification. The detection part consists of range-processing, moving indication using the coherent phase difference method, Doppler-processing, digital beam forming, hit decisions to determine strong stationary targets. To delete ghost targets compensate missing targets, design tracking stage include clustering, data association, track management, a filter. Finally, classification...

This paper proposes a high-efficiency super-resolution frequency-modulated continuous-wave (FMCW) radar algorithm based on estimation by fast Fourier transform (FFT). In FMCW systems, the maximum number of samples is generally determined detectable distance. However, targets are often closer than this case, even if reduced, ranges can be estimated without degrading performance. Based property, proposed adaptively selects used as input to depends coarsely using FFT. The employs reduced...

In this paper, we aim to reduce the channel switching time for Internet protocol TV (IPTV) without unduly influencing picture quality. For purpose, propose adopt H.264 scalable video coding scheme, which allocate a base layer and enhancement layers of each two separate multicast groups. preview mode, users access different channels already stored in buffer, so they can switch between delay. watching use both selected achieve full While providing fast our approach proves maintain quality...

An efficient mobile video streaming system needs to cope with unstable network bandwidth and limited battery life. We propose a novel which jointly considers picture quality, bit-rate energy consumption. Reducing the spatial resolution of stream adaptively proves be more in terms quality consumption than conventional rate control using only adjustment quantization parameter. apply same scheme scalable coding for large-scale streaming. This extends adaptation an SVC lower bit-rates, while...

Cloud computing can bring many advantages for companies such as cost efficiency, reducing time to access the market, ease use, flexibility and adaptability change different condition, etc. However, adoption rate in Vietnam is still beginning stage with not adopters. As a result, this study focuses on of cloud among Vietnamese companies. Eight factors were identified determinants by combining two widely applied IT theories i.e. Diffusion Innovation Technology-Organization-Environment...

To compensate for the temperature dependency of a standard FBG, cladding-etched FBG immersed with liquid mixture having negative thermo-optic coefficient is presented, and its characteristics are investigated. The Bragg wavelength shifted counter to direction shift conventional according mixing ratio glycerin water; thus, temperature-dependent was almost compensated by using water (50%) −5 × 10−4 °C−1.

This paper proposes a low-complexity frequency-modulated continuous wave (FMCW) surveillance radar algorithm using random dual chirps in order to overcome the blind-speed problem and reduce computational complexity. In algorithm, most widely used moving target indicator (MTI) is proposed effectively remove clutter. However, MTI has so-called ‘blind-speed problem’ that cannot detect of specific velocity. this paper, we try solve by randomly selecting two beat signals selected for each frame....

FMCW(frequency modulation continuous wave) radar has many useful applications but a serious problems can occur in multi-target situations. Range-velocity processing should suppress so-called ghost targets and detect missing presented by beat frequency shift with Doppler frequency. In this paper, new method is proposed for effective identification of the correct pairs frequencies received from real targets.

FMCW (Frequency Modulation Continuous Wave) radar has been a popular method for automotive applications. The typical radar, however, serious problems in multi-target situations. That is, range-velocity processing gives rise to so-called ghost targets due Doppler shift the received beat-frequency. In this paper, we propose new transmit wave and detection algorithm. proposed method, rough range is detected first period, fine velocity are obtained second period.

We proposed a dual smoothing superresolution direction-of-arrival (DOA) estimation for multitarget detection with two-channel frequency modulated continuous-wave (FMCW) radar. For the conventional FMCW radar, number of detectable targets DOA is limited by RX antenna arrays. To enable more than receiving channels, we propose exploiting shift invariant structure smoothed matrix. implemented radar and tested performance method.

This paper proposes a low complexity multiple-signal-classifier (MUSIC)-based direction-of-arrival (DOA) detection algorithm for frequency-modulated continuous-wave (FMCW) vital radars. In order to reduce redundant complexity, the proposed employs characteristics of distance between adjacent arrays having trade-offs field view (FOV) and resolution performance. First, performs coarse DOA estimation using fast Fourier transform. On basis estimation, number channels as input MUSIC are selected....

For radar systems, target detection procedures need to be conducted with a received signal amplitude that exceeds the CFAR (Constant False Alarm Rate) threshold. An Ordered Statistics (OS-CFAR), based on sorting algorithm, is useful for an automotive system in multi-target situation. However, it has limitation requires higher computation effort than typical Cell Averaging CFAR. In this paper, we propose new OS-CFAR architecture low computational effort. proposed approach, single step...

Object detections are critical technologies for the safety of pedestrians and drivers in autonomous vehicles. Above all, occluded pedestrian detection is still a challenging topic. We propose new scheme by means lidar–radar sensor fusion. In proposed method, lidar radar regions interest (RoIs) have been selected based on respective measurement. Occluded depth to determine whether an target exists or not. The region projected out expanding longitudinal distance with maintaining angle formed...