The downlink (base-to-mobile) bit error rate (BER) performance for a mobile user with relatively weak received signal in a multicarrier-CDMA (MC-CDMA) cellular system can be improved by utilizing the site diversity reception. With joint use of MMSE-based frequency domain equalization (FDE) and antenna diversity combining, the site diversity operation will increase the downlink capacity. In this...

In this paper we introduce a wideband threeelement diversity antenna for compact wireless communication systems operating at the 4-6 GHz band. A series of experiments to characterize the diversity performance of the antenna for non-line-of-sight (NLOS) indoor multipath environments have been conducted. From these experiments, we calculate e n v e l o p e correlation, power imbalance, and divers...

Millimetre-waves offer the possibility of wide bandwidth and consequently high data rate for wireless communications. For both uniand dual-polarized systems, signals sent over a link may suffer severe degradation due to antenna misalignment. Orientation robustness may be enhanced by the use of mutual orthogonality in three dimensions. Multipleinput multiple-output polarization diversity offers ...

This paper presents a general method for calculaling the average error rates and outage performance of a broad class of coherent, differentially coherent and noncoherent communication systems with/without diversity reception in a myriad of fading environments. Unlike the moment generating function (MGF) technique, the proposed characteristic function (CHF) method based on Parseval's theorem ena...

191 REFERENCES [lOI __ “More on uncertainty feedback: The bandlimited case” IEEL? Trans. Inform. Theory, vol. IT-l?, Mar. 1968, pp. 321-32:. A. J. Kramer, “Improving communication reliability by use of an intermittent feedback channel.” IEEE Trans. Inform. Theory, ~1. DX;nJa11;<1969, pp. 52-66. . Phase incoherent feedback communication,” Commun. Theory Lab., California. Inst. Technol., Pasadena...

In this paper, we present a comprehensive performance evaluation of chip interleaving effect on turbo coded direct sequence spread spectrum (DS-SS) system in a frequency non-selective Rayleigh fading channel with antenna diversity reception. At the transmitter, chip interleaver scrambles the SF (spreading factor) chips associated with a data symbol and transforms the transmission channel into a...

SIMULATION ANALYSIS OF ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEMS WITH DIVERSITY RECEPTION SAI SRAVAN BHARADWAJ KARRI, M.S The University of Texas at Arlington, 2008 Supervising Professor: Vasant K Prabhu With the rapid increase in the utility of voice and data services, there is a demand for higher data rates and reliability in wireless communications. A wireless communication channel ...

In free-space optical communication links, atmospheric turbulence causes fluctuations in both the intensity and the phase of the received light signal, impairing link performance. In this paper, we describe several communication techniques to mitigate turbulence-induced intensity fluctuations, i.e., signal fading. These techniques are applicable in the regime in which the receiver aperture is s...

Millimetre-waves offer the possibility of wide bandwidth and consequently high data rate for wireless communications. For both uni- and dual-polarized systems, signals sent over a link may suffer severe degradation due to antenna misalignment. Orientation robustness may be enhanced by the use of mutual orthogonality in three dimensions. Multiple-input multiple-output polarization diversity offe...

A coherent rake combiner is employed as the channel matched filter in a DS-CDMA mobile radio. However, as the number of propagation paths increases, the coherent rake receiver incurs a serious degradation in the bit error rate (BER) performance due to severe inter-path interference (IPI). In this paper, frequency-domain equalization employed in multi-carrier code division multiple access (MC-CD...