The objective of this paper is to compare the performance of coherent and non-coherent modulation schemes with the use of error correcting codes and Artificial Neural Network (ANN) assisted equalization as an aid to Maximal Ratio Combining (MRC) in order to improve bit error rate (BER) values of demodulated signals in wireless channels. The wireless channels are assumed to have both Gaussian an...

Multi-Carrier CDMA (MC-CDMA) systems using the Orthogonal Frequency Division Division Multiple Access (OFDM) technique resolve the frequency se-lectivity in multipath fading channels and have good spectral properties. The addition of a spread spectrum component to the OFDM introduces a frequency diversity gain that can combat deep multipath fading situations. In this paper a MC-CDMA system oper...

This paper presents a novel receiver design from signal processing viewpoint for direct-sequence code-division multiple access (DS-CDMA) systems under multipath fading channels. A robust adaptive decision-feedback equalizer (DFE) is developed by using optimal filtering technique via minimizing the mean-square error (MSE). The multipath fading channels are modeled as tapped-delay-line filters, a...

The timeand frequency-varying behavior of an indoor power-line network is the result of variable impedance loads connected to its termination points. In fact, any signal transmitted through such a communications network is subject to time-varying multipath fading. In this paper, an analytical calculation method is presented, which can be used to determine the multipath components of any point-t...

In this paper, we develop a statistical geometric propagation model for a macrocell mobile environment that provides the statistics of angle-of-arrival (AOA) of the multipath components, which are required to test adaptive array algorithms for cellular applications. This channel model assumes that each multipath component of the propagating signal undergoes only one bounce traveling from the tr...

Multipath fading is one of the major practical concerns in wireless communications. Multipath problem always exists in mobile environment, especially for mobile unit which is often embedded in its surroundings. A time-variant tapped line delay model has been used for multipath fading in a wide-band spread spectrum mobile system. In this paper, we proposed to use the detection and estimation tec...

Diversity schemes are being used on mobile cellular networks to combat the effect of multipath fading mainly at the base station site. Since digital TV will be deployed using UHF bands, this paper proposes to study the feasibility of using space diversity for the mobile digital TV reception since these kind of system is also subjected to multipath effects. This work experimentally investigates ...

Aalto University, P.O. Box 11000, FI-00076 Aalto www.aalto.fi Author Zhong Zheng Name of the doctoral dissertation Statistical Analysis of Cascaded Multipath Fading Channels Publisher School of Electrical Engineering Unit Department of Communications and Networking Series Aalto University publication series DOCTORAL DISSERTATIONS 209/2015 Field of research Communications Engineering Manuscript ...

A transmitted radio wave interacts with various physical objects within the channel; a process that manifest itself as a multipath propagation, i.e., the transmitted wave reaches the receiver through many different propagation paths. The principle of superposition leads to constructive and destructive interference of the waves, which is evidenced as a variation in the received signal power, ref...

Mitigation of multipath fading effects and suppression of multiuser interference (MUI) constitute major challenges in the design of wide-band third-generation wireless mobile systems. Space–time (ST) coding offers an effective transmit-antenna diversity technique to combat fading, but most existing ST coding schemes assume flat fading channels that may not be valid for wide-band communications....