The improved energy detector in the Cognitive Radio Network is modified by replacing the squaring operation of the received signal amplitude in the conventional energy detector with an arbitrary positive power p. In this paper, the cognitive radio networks take a decision of the presence or absence of...

High-speed mobile wireless communication system always goes through the doubly selective wireless fading channels, which seriously affects the performance of communication systems. In this paper, a non-coherent chirp spread spectrum (CSS) communication method is proposed based on CORDIC algorithm and...

In view of the security issue of the simultaneous wireless information and power transmission (SWIPT), this paper presents a secrecy SWIPT communication system based on code division multiple access (CDMA) architecture. The transmitter uses different spread spectrum polynomials to spread spectrum information...

Software-defined network (SDN) has received great concern because of its prominent advantages in some aspects such as high flexibility, programmability and dynamic management, etc. Recently, some works begin to apply the concept of SDN in mobile networks to make the networks more open and agile. However,...

With the development of wireless communication and computer networks, wireless network has a very wide range of applications on instruments to improve information acquisition and processing capabilities. A peristaltic pump controller with MCU is designed. The controller is constructed with the working...

Characteristics of a rectangular waveguide array with a frequency-selective shield of semielliptical shape with expansion of an operating band are investigated. It is shown that the region of transparency of the shield displaces down in a frequency in a comparison with the plane infinite frequency-selective...

The extremely high sampling rate is a challenge for ultra-wideband (UWB) communication. In this paper, we study the compressed sensing (CS) based impulse radio UWB (IR-UWB) signal detection and propose an IR-UWB signal detection method based on compressive sampling matching pursuit (CoSaMP) algorithm....

In the surface stress detection system of the mine hoist machine drum, the wireless sensor nodes placed on the drum need to be powered by a battery. Since the sampling frequency is high and the wireless transmitting and receiving data is enormous, the battery needs to be replaced very frequently. To...

In wireless sensor networks, the average cycle method is used to analyze the proposed protocol: the discrete time non-persistent CSMA protocol with functions of monitoring and multichannel mechanism based on binary tree conflict resolution; accurate mathematical expressions of related indicators are...

In this paper, we propose an efficient soft iterative decoding method for raptor codes, which are customized for satellite broadcasting systems. The raptor codes presented in this paper are composed of a systematic LDPC code concatenated with another systematic Luby transform (LT) code. The outer codes...

Transmission control protocol veno is a wireless transmission congestion control algorithm which can better distinguish different loss. It determines whether the packets random loss or congestion loss through calculate to the packets number of backlog in the network. However, transmission control protocol...

To decrease the Inter-Symbol Interference (ISI) for the frequency selective channel at low SNR, a spectrum combining technique based on average phase from the multiple sensors without synchronization is proposed. The combining signal’s phase will converge to the average phase instead of the value of...

In order to solve channel estimation problem in OFDM (orthogonal frequency division multiplexing) systems, a decision–directed method is proposed for channel estimation and equalization based on OFDM. The proposed method uses a received subcarrier-symbol to represent the competitive neural network, uses...

To address the contradiction between data aggregation and data security in wireless sensor networks, an integrity-assured concealed data aggregation scheme is proposed based on the privacy homomorphism and the aggregate message authentication code techniques. The proposed scheme provides both end-to-end...

A novel compact wideband circularly-polarized (CP) helix antenna is presented in this paper. Unlike conventional helical geometry, our design adopts a tapered metal strip which is rolled into a conical shape and is simply fed by attaching to a 50? coaxial cable. All the configuration parameters are optimized...

Spatial Modulation (SM) is a recently emerged Multiple-Input Multiple-Output (MIMO) technique, which has been proved to be low-complexity and more energy-efficient compared with classical MIMO techniques. As an entirely novel hybrid modulation scheme, the performance of SM is highly dependent on the...

The software engineering is applying the engineering discipline to the design, development, maintenance of software. In this paper, a dual environment design is introduced to prove the power of the software engineering to integrate the advantages of two different environments (VB.NET and MATLAB). The...

The main research in this article is wireless sensor network design problem about radar engineering vehicle. The core of the research in the text relates to a multi-sensor energy nodes arrangement based and covering algorithm. Firstly, Sensor nodes arrangements and coverage area was descript in this...

In this paper, approximate formulas are obtained for the monostatic and bistatic diagrams of radar cross-section of waveguide Van-Atta array considering excitation and propagation of higher types of waves in tracts. Their contribution to the scattered field is studied. The required number of higher types...

In order to obtain the performance of high gain and omnidirectional radiation pattern, an antenna array composed of four elements is proposed in this paper. The antenna achieves a bandwidth of 8.5% (190MHz) for a return loss (RL)

In order to further improve the communication efficiency and communication rate of space laser communication, we used Circle Polarization Phase Shift Keying (CPolSK) and Circle Polarization Differential Orthogonal Phase Shift Keying (CPolDQPSK) modulations to adapt to the demands of the rapid development...

Rocky desertification is a typical type of land degradation in the Southwestern China. It has great economical and ecological implications for the local people. Landsat images for Qingzhen city of Guizhou Province collected in 2000, 2005 and 2010 were used for Karst rocky desertification monitoring....