In this communication, necessary and sufficient conditions are presented for the unique blind identification of possibly nonminimum phase channels driven by cyclostationary processes. Using a frequencydomain formulation, it is first shown that a channel can be identified by the second-order statistics of the observation if and only if the channel transfer function does not have special uniformly spaced zeros. This condition leads to several necessary and sufficient conditions on the observation spectra and the channel impulse response. Based on the frequency-domain formulation, a new identification algorithm is proposed

Blind channel identification based on second-order statistics: a frequency-domain approach

Thank you for downloading conformal array antenna theory and design. As you may know, people have look hundreds times for their favorite books like this conformal array antenna theory and design, but end up in malicious downloads. Rather than enjoying a good book with a cup of tea in the afternoon, instead they are facing with some harmful virus inside their laptop. conformal array antenna theory and design is available in our digital library an online access to it is set as public so you can get it instantly. Our books collection hosts in multiple countries, allowing you to get the most less latency time to download any of our books like this one. Kindly say, the conformal array antenna theory and design is universally compatible with any devices to read.

Conformal Array Antenna Theory And Design

This paper presents a dual band circular microstrip patch antenna with an elliptical slot for future 5G mobile communication networks. The antenna has resonating frequencies of 28 GHz and 45 GHz, with bandwidths of 1.3 GHz and 1 GHz, respectively. Efficiency of the antenna is 85.6% at 28 GHz and 95.3% at 45 GHz. The return loss at 28 GHz is −40 dB, with maximum gain of 7.6 dB while at 45 GHz return loss is −14 dB with maximum gain of 7.21 dB. The antenna is designed on a Rogers RT5880 (lossy) substrate with dielectric constant of 2.2 and loss tangent (tan δ) of 0.0013. The antenna has a compact size of 6× 6× 0.578 mm3. Array configuration is used to achieve 12 dB gain, required for mobile communication. The proposed array has resonance frequencies of 28 GHz, 34 GHz and 45 GHz with maximum gain of 13.5 dB and radiation efficiency of 98.75%. Centre series fed technique is used for the excitation of array. SAR value of array antenna obtained at 28 GHz is 1.19 W/kg, at 34 GHz is 1.16 W/kg, and at 45 GHz is 1.2 W/kg. CST Microwave Studio, a 3D simulating tool, is used for the antenna design and calculation of the antenna parameters along with the SAR analysis.

https://www.jpier.org/download/18101401.pdf

Elliptical slot circular patch antenna array with dual band behaviour for future 5G mobile communication networks

https://cyberleninka.org/article/n/192835.pdf

Symmetric encryption algorithms using chaotic and non-chaotic generators: A review.

A depth camera-based novel method is proposed here for efficient facial expression recognition. For each pixel in a depth image, eight local directional strengths are obtained and ranked. Once the rank of all pixels is obtained, eight histograms are developed for the eight surrounding directions. The histograms are then concatenated to represent features for a depth image of a face. This approach is named local directional rank histogram pattern (LDRHP). To combine with LDRHP features, one more robust feature extraction technique named local directional strength pattern (LDSP) is proposed. Typical local directional pattern (LDP) considers only absolute values of edge strengths for a pixel. This generalization in LDP may generate the same patterns for two different kinds of edge pixels. LDSP can overcome this problem. It considers the binary values of the position with the directions representing the highest and lowest original strengths. The highest strength indicates the strongest direction on the bright side of a pixel and the lowest one indicates the strongest direction in the dark side of that pixel. Hence, combining binary positions of these two directions can generate more robust patterns than LDP. Besides, LDSP pattern of a pixel is of six bits, whereas traditional LDP-based patterns are of eight bits (e.g., local directional deviation-based pattern and local directional position pattern). Thus, LDSP reduces the dimension of features with the same time adding robustness. For a depth image in a depth video, LDSP features are augmented with LDRHP features followed by Kernel principal component analysis and generalized discriminant analysis to generate more robust features. At last, the features are trained with a deep learning approach and convolutional neural network for successful facial expression recognition. The proposed approach is compared and shown to outperform the traditional expression recognition methods.

Facial Expression Recognition Using Salient Features and Convolutional Neural Network

Antenna Miniaturization for IoT Applications

I n this Paper I have taken the different buffer (packet) size for different Routing Protocols and study the different performance matrices where we will get the optimize result and where we will get the worst result i.e. where we get the maximum packets and where packet reception at receiver is minimum..In this paper we have taken the one Protocol from each category of Routing Protocols.

Comparative study of different Parameters of MANET Routing Protocol for different Buffer Size

Abs tract—In this paper we show the experimental characterization of optical fiber long period grating for the reduced temperature sensitivity by optimizing the refractiveindex profile of the host fiber. In Long Period Fiber grating the fundamental guided mode light couple with the into copropagating cladding modes at various wavelengths. The two layer Geometry later on the three layer geometry which is useful for refractive index sensing sensing application. The sensitivity of LPFGs to environmental parameters is influenced by the period of the LPFG by the order of the cladding mode to which coupling takes place and by the composition of the optical fiber. A novel method to compensate the temperature sensitivity using a boron co-doped germanosilicate core fiber is used as a host fiber. The Theoretical Characteristic Results matches with the experimental results which demonstrate that such gratings with reduced temperature coefficient retain their capability to detect strain and ambient index variations.

/pdf/experimental-characterization-of-optical-fiber-long-period-4gz1bxh9v8.pdf

Sandip Vijay

Papers

Antenna Miniaturization for IoT Applications

Comparative study of different Parameters of MANET Routing Protocol for different Buffer Size

Experimental Characterization of Optical Fiber Long Period Grating with Reduced T emperature Sensitivity

Underwater images quality improvement techniques for feature extraction based on comparative analysis for species classification

Conformal Wearable Antenna Design, Implementation and Challenges