The aim of this paper is to analyze the bit error rate (BER) performance of WiMAX physical layer with the implementation of different concatenated channel coding schemes under QAM and 16QAM digital modulations over realistic channel conditions (i.e. noise and multipath fading). In concatenated channel coding, the WiMAX system incorporates CRC-CC (Cyclic Redundancy Check and Convolutional) or RS...

The enhanced Loran signal transmits the through atmospheric channel. Considering obstacles and other factors, radio wave will be affected by path loss, shadow fading multipath fading. Therefore, power at different distances from transmitting point is different. scaled model antenna used to transmit receive signal, receiver receive. According of received receiver, propagation distance can deduce...

OF THE DISSERTATION Wireless Networks in Non-Ergodic Multipath Fading: Capacity and Relaying Performance Analysis by Yoav Nebat Doctor of Philosophy in Electrical Engineering (Communication Theory and Systems) University of California, San Diego, 2007 Professor Laurence B. Milstein, Chair Professor Rene L. Cruz, Co-Chair Wireless channels experience random multipath fading. Reliable and efficie...

In this paper, we have proposed multipath fading channel simulation model for wireless communication. We have tested the model for sine wave and complex wave inputs. The effects of noise on fading and scattering property of the channel were tested. The results show that the BER performance is improved dramatically in low SNR than in high SNR. This is reasonable since at low SNR, white Gaussian ...

We consider initial timing acquisition in DS-CDMA when propagation is affected by multipath and fading and where the base-station broadcasts a synchronization pilot signal in the form of bursts of modulated chips transmitted periodically and separated by long silent intervals. Subject to certain simplifying assumptions we derive the maximum likelihood (ML) estimator by solving a constrained max...

Energy detection is a widely used method of spectrum sensing in cognitive radio and Radio Detection And Ranging (RADAR) systems. This paper is devoted to the analytical evaluation of the performance of an energy detector over Weibull fading channels. This is a flexible fading model that has been shown capable of providing accurate characterization of multipath fading in, e.g., typical cellular ...

Tracking performance of the I-Q carrier recovery loop for BPSK signal in bandlimited channel with multipath interference is analysed. The multipath fading channel is characterised by the Rummler’s model (a simplified three-ray model) for line-of-sight digital radio system. A closed-form expression for the phaseerror variance related to the multipath interference, intersymbol interference and ch...

In this paper we review the most peculiar and interesting information-theoretic and communications features of fading channels. We first describe the statistical models of fading channels which are frequently used in the analysis and design of communication systems. Next, we focus on the information theory of fading channels, by emphasizing capacity as the most important performance measure. Bo...

We analyze the performance of Differential Chaos Shift Keying (DCSK) over communication channels exhibiting multipath fading. Formulas are derived for the bit error rate (BER) performance in the single user case and compared with simulation results. Keywords—chaos, communication, fading, DCSK