Abstract The uplink performance of a direct-sequence code division multiple access (DS-CDMA) packet cellular system is limited by multi-access interference (MAI) from the other users. On one hand, adaptive antenna array (AAA) is a promising technique to increase the link capacity by suppressing the MAI of mobile radio communications systems. On the other hand, transmit power control (TPC) is an...

The effects of multipath and tracking error on a RAKE receiver have been analyzed in this paper. It has been shown that in the presence of unresolvable multipath, the RAKE receiver, formed by combining same samples that are used for tracking, is less sensitive to the tracking error, and that there is a wide range of tracking errors for which such receiver outperforms conventional receiver. Also...

The performance of coherent antipodal chaos-shift-keying (CSK) communication systems in a multipath channel is evaluated. A two-ray independent Rayleigh fading channel model is considered. Also studied is the performance when a Rake demodulator is employed. The analytical method for computing the bit error rate (BER) of such systems is derived. The theoretical BER results are presented and comp...

In this paper, we propose an MCCDMA model using Rake Receiver and different equalization techniques (ZF, MMSE, EGC and MRC) are used. Rake receiver using different number of fingers has been considered for performance evaluation. Simulation has been carried out using MATLAB 2010a. Additionally, we examine its BER v/s SNR graph for different types of equalizers in Rayleigh fading channel. Simula...

Location finding searchers have recently emerged as essential elements in future CDMA wireless systems. In this paper we present a new combined architecture for location searchers and conventional RAKE receivers, which IS based on multiplexing common hardware blocks between the two structures. In so doing, most of the needed hardware for the conventional RAKE fingers and channel searcher is sav...

Several power control methods in cellular radio systems are reviewed. An adaptive power control scheme based on the adaptive optimization of transmitter power and receiver filter coefficients is analyzed. We implement the power control algorithm, adaptive RAKE receiver and analog RF power amplifier in HP Advanced Design System. We perform the co-simulation in HP Advanced Design System to prove ...

A novel method using luminescent molecule sensors is described for in situ measurement of fluid film thickness along the tool rake face in machining. The method uses an optically transparent sapphire tool to access the rake face, and measurement of radiation emitted by luminescing molecules dispersed in a machining fluid. By measuring the intensity of the emission, the film thickness is estimat...

Wideband Multicarrier code division multiple access (MCCDMA) and Rake receivers for wavelet video transmission with four levels of unequal error protection (UEP) codes over additive white Gaussian noise (AWGN) and Rayleigh fading channels are performed and evaluated. The deployment of Wavelets has approached a powerful technique and high quality for compressing video sequence. A spatially scala...