This paper demonstrates optimum receiver performance in terms of bit error rate (BER) for time hopping pulse position modulation (TH-PPM) ultra wideband (UWB) system in multiple user interference environment for indoor radio communication. Equal gain combining and selective gain combining have been demonstrated in terms of ideal RAKE (ARAKE), selective RAKE (SRAKE) and partial RAKE (PRAKE) rece...

An FPGA implementation of WCDMA-RAKE receiver architecture 1 2 Rakesh Kr. Jha, Mamta Sood Dept. BIST Bhopal, (M.P.) India EC Dept., TIT College, Bhopal, (M.P.) India This paper deals with the WCDMA Rake-receiver architecture for 3G communications. Third generation mobile communication is vastly advanced and emerging technology in the field of wireless communication. Third generation communicati...

The third-generation universal mobile telecommunications system (UMTS) uses direct-sequence code division multiple access (DS-CDMA) to transmit data. DS-CDMA is well suited to transmit data over the multipath fading channel. The high signal bandwidth for the WCDMA system (5 MHz) allows the received signal to be split into distinct multipaths with high resolution. For the first generation of UMT...

Performance of multistage interference cancellation (MIC) and three combining techniques, i.e., multipath decorrelating (MIC-DECO), optimum combining (MIC-OPTM), and Rake combining (MIC-RAKE) for asynchronous QPSK/ DS/CDMA over frequency-selective multipath Rayleigh fading channels is studied. The analytical bit error probabilities of the MIC-DECO and MIC-OPTM are derived and shown to be in a g...

We consider the effect of mobility on a wideband direct sequence spread spectrum (DSSS) communication system, and study a scale-lag Rake receiver capable of leveraging the diversity that results from mobility. A wideband signal has a large bandwidthto-center frequency ratio, such that the typical narrowband Doppler spread assumptions do not apply to mobile channels. Instead, we assume a more ge...

The industrial environments are an important scenario for ultra wideband (UWB) communication systems. However, due to large number of metallic scatterers in the surroundings, the multipath offered by UWB channels is dense with significant energy. In this paper, the performance of RAKE receivers operating in a non line-of-sight (NLOS) scenario in these environments is evaluated. The channels use...

| Conventional RAKE receiver is near-far limited in code-division multiple-access (CDMA) systems. Linear minimum mean squared error (LMMSE) criterion can be used to obtain near-far resistant single-user receivers. Depending on the optimization criterion diierent adaptive receivers are obtained. In this paper, a novel adaptive LMMSE-RAKE receiver based on two diierent LMMSE criteria is presented...

In this paper, an advanced closed loop polarized Multiple-Input Multiple-Output antenna system employing Pre-RAKE and Combined Transmit Diversity techniques “Polarized MIMO Pre-RAKE CTD system” is proposed in Frequency Division Duplex (FDD) mode. The proposed system introduces a significant performance gain without increasing the complexity and the power consumption of the mobile terminal as we...

The third-generation universal mobile telecommunications system (UMTS) uses direct-sequence code division multiple access (DS-CDMA) to transmit data. DS-CDMA is well suited to transmit data over the multipath fading channel. The high signal bandwidth for the WCDMA system (5 MHz) allows the received signal to be split into distinct multipaths with high resolution. For the first generation of UMT...

RAKE receiver is used in CDMA-based (Code Division Multiple Access) systems and can combine multipath components, which are time-delayed versions of the original signal transmission. Combining is done in order to improve the signal to noise ration at the receiver. RAKE receiver attempts to collect the time-shifted versions of the original signal by providing a separate correlation receiver for ...