A carrier separated OFDM system is proposed to support high data rates in mobile multiple access environments. OFDM is considered to support high data rates and carrier separation is introduced to combat multipath fading. The performance is comparable to that of a frequency hopped OFDM system. While promising robustness against multipath fading, the computational complexity of a carrier separat...

Antenna diversity is an effective solution to mitigate multipath fading signals and enhance the system capacity. Ultra wide band has become one of the most favourable technologies for wireless communications owing to its promising features such as low susceptibility to multipath fading, reduced probability of detection and intercept, and potentially high data rates. The aim of project is to des...

The behavior of MAC protocols for wireless ad hoc networks is conditioned by multipath fading, especially with regard to the links stability and the differences between channel errors and collisions due to interference. In this paper, we evaluate the impact of multipath fading on the performance of a TDMA proposal designed to provide QoS in wireless ad hoc networks. It lies in a frame subdivisi...

The aim of this project is to know how OFDM performs in multipath conditions. We have seen in class that OFDM performs better in this kind of scenarios, but is it really worth using it? why? These are two of the questions we will try to answer with this project. This report is presented in a way that rst it introduces the underlying theory, and then analyzes the simulations performed. All in or...

Multipath is one of the most dominant sources of errors in Global Navigation Satellite Systems (GNSS). In this paper we present two tracking structures with multiple gate delays and compare their performance with the performance of Narrow Correlator and High Resolution Correlator. The performance criteria are based on the Multipath Error Envelopes (MEEs), the Root Mean Square Errors (RMSEs) and...

Most analytical studies of the performance of space diversity systems on fading channels assume a very rich multipath environment. In certain wireless applications, however, the number of significant multipath components can be small. In this letter, we consider a multipath channel in which the signal propagates from the transmitter to the receiver via discrete paths which are uniformly distrib...

The Orthogonal Frequency Division Multiplexing-Interleave Division Multiple Access (OFDM-IDMA) scheme, which offers significant improvement on the performance of the conventional IDMAtechnique, has been in the forefront of recent mobile communication researches as it is expected to deliver a high quality, flexible and efficient high data-rate mobile transmission. Most papers on OFDM-IDMA scheme...

An argument of common probability density function (pdf) is generally a real number, which describes the density, or mass in case of discrete random variable, of a random variable. However, in some applications, the pdf can be a complex function, so called complex probability density function. This kind of pdf is then, as general complex function, characterized by the amplitude and phase and is...

This paper focuses on the synchronization of two chaotic systems, when they are connected, using a multipath fading channel. The proposed algorithm is then applied to secure communication and realizing it using VHDL. The results reveal that signals to chaos ratio of -248 dB and synchronization are achieved. Performance analysis have been conducted to investigate the robustness of the encryption...

This study attempts to develop a time-scale deconvolution filter for optimal signal reconstruction of nonstationary processes with a stationary increment transmitted through a multipath fading and colored noisy channel with stochastic tap coefficients. A deconvolution filter based on wavelet analysis/synthesis filter bank is proposed to solve this problem via a three-stage filter bank. A fracta...