An accurate MATLAB-based CAD algorithm for quickly designing microstrip-based stepped-impedance resonator (SIR) low-pass filter is reported. The algorithm uses a circuit-theory approach to implement speedy computations, compared to the time-consuming computations involved in using electromagnetic theory.
The accuracy of the proposed algorithm is verified for two widely-different practical examples in the 0-4GHz frequency range, against results obtained using Ansoft/Ansys circuit simulation tool, and against results obtained using the 3D electromagnetic simulator HFSS. The agreement among the three sets of data is seen to be excellent for most cases, and is found to be practically acceptable in the worst-case.

A mobile ad hoc network is a collection of wireless nodes without any fixed structure and connected with each other through wireless links. MANETs have self-organized topology in which mobile nodes are free to move, as a result establishing a stable and reliable network is a difficult and critical task. Nodes in Nobile Ad-hoc network acts as sender, receiver and router for communicating data and control packets. Using NS-2 simulator Performance of AODV, DSDV and DSR is analyzed under varying pause time in this paper. Performance of these routing protocols are analyzed on the base of following performance metrics: packet delivery ratio, average end to end delay, throughput, no of sent packets, no of receive packets, no of routing packets, normalized routing load and no of dropped packets under variant Pause time. Results of Comparison analysis of Routing Protocols are generated with the help of Simulation in the form of graphs. The simulation result shows the significance of each protocol in different situations. We believe that this study will provide comprehensive comparative study of AODV, DSR and DSDV based on varying pause time at one place, which will help the researcher to further investigate any particular metrics value of particular protocol.

Researches in the reduction of peak-to-average power ratio (PAPR) from orthogonal frequency division multiplexing (OFDM) output signals are being done using many techniques. Selected mapping (SLM) technique is a distortion-less technique and is a well known method to reduce high PAPR of OFDM signal. One drawback of SLM is its requirement of side information bits to recover original data block at the receiver side which lead rate of data loss. In this paper, we have proposed a sequential phase sequence SLM (SPS-SLM) based OFDM transceiver without side information and studied its performance. For the proposed method, a specific set of phase sequences is designed. MATLAB simulation shows that the proposed scheme performs well in terms of PAPR. Proposed method provides almost the same PAPR reduction performance compared to the conventional SLM method requiring side information.