It is a review of the distinct physical characteristics of left-handed materials. A new idea is proposed that the left-handed materials are applied to the design of microstrip antenna. Two microstrip antennas are designed based on the new left-handed Structure which definitely enhance the directivity...

The time-frequency double selective characteristic of wireless fading channel destroys the orthogonality among subcarriers, thus generating ICI, which affects the quality of communication seriously. Starting from subcarriers, an ICI suppression scheme based on affine fourier transform was proposed to...

To enhance the WLAN data transmission capacity and improve network coverage, with ad hoc relay nodes introduced in WLANS, proposed a network structure, which can construct multi-hop network and realize ad-hoc networking. This paper first introduced network model structure of WLAN multiple hops ad hoc,...

To reduce the interference of Ad hoc-cellular network system, and ensure the normal communication of chief users, this paper proposes an improved distributed channel allocation algorithm based on game theory. The algorithmic utility function not only considers secondary users’ interference each other,...

As more and more Fiber Channel related products are being used, the needs of a FC test & analysis system are more urgent now. A FC system is a test & analysis system that can test the performance of the network, can capture the Fiber Channel data and can simulate and analysis the protocols. This paper...

This work proposes a Dynamic Bandwidth Allocation (DBA) scheme for next-generation OFDMA-PON to accommodate wireless signals. We transform DBA into a multi-objective optimization problem, and Non-dominated Sorting Genetic Algorithm is applied to get best-fitted individuals for each Optical Network Unit...

Performance of medium length LDPC codes is directly proportional to error floor .In these codes, error floor can be mainly improved through elimination of short cycles. Hence, for effective elimination of short cycles, it is customary to use a girth conditioning in random construction process. Various...

Aiming at the issue of communication training in radar equipment with great difficulty, this paper advances the solution of designing radar communications training simulation system. Researching the simulation system functional orientation, programs the system required modules. Focuses on the modeling...

In this paper, simple and low profile wideband U- shape radiating structure with rectangular ground microstrip monopole antenna is proposed. Designed antenna has control over the entire ultra wideband. It is suitable for 3.5 to 13.6 GHz by controlling the dimension of U-shape radiating structure and...

The paper investigates the performance of packet loss rate and packet time delay in IEEE 802.11 wireless local area networks (WLANs) with distributed coordination function (DCF). We derive an analytical model to study these performance metrics in terms of the data payload length, wireless channel condition,...

Aiming to characteristics of transmission path loss in mobile channel which is caused by complex electromagnetic environment on an open sea area, an improved Irregular Terrain Methodology ITM model is proposed in this paper. The algorithm first uses a Two-Path Model to calculate the transmission loss...

Several Weighted BF (WBF) algorithms are investigated in this paper, and a novel modified reliability-ratio based WBF (MRWBF) decoding algorithm for LDPC codes is proposed. WBF algorithm considers the influence of parity information on the error metric. Based on WBF, the improved WBF (IWBF) algorithm...

Increasing attention is being paid to solving engineering design optimization problems which are generally nonlinear and constrained. In this paper, the Seven-spot Ladybird Optimization (SLO) algorithm is developed to obtain the solution of such optimization problems. This paper presents the basic concepts...

Considering the energy balance of nodes and “hot spots” in the non-uniform distribution wireless sensor networks in a large region, non-uniform region based clustering routing algorithm(NRBC) for wireless sensor networks is proposed. According to NRBC, the non-uniformly distributed nodes are divided...