Joint Synchronization and Calibration of Multi-channel Transform-domain Charge Sampling Receivers. (May 2009) Pradeep Kotte Prakasam, B.E., Anna University, Chennai, India Chair of Advisory Committee: Dr. Sebastian Hoyos Transform-domain (TD) sampling is seen as a potential candidate for wideband and ultra-wideband high-performance receivers and is investigated in detail in this research. TD re...

| 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...

ABSTRACT This paper describes a fully-differential anti-alias filter (AAF) and analog-to-digital converter (ADC) for baseband processing of a wideband RF signal. The AAF is a third order elliptic low-pass filter. The ADC is a 2-2 cascade sigma-delta architecture with a single-bit quantizer in the first stage and a 13-level quantizer in the second stage. The system converts a 2.5 MHz input signa...

This paper presents analysis of a digital Ultrawideband (UWB) radio receiver operating in the 3.1 GHz to 10.6 GHz band. Analog to digital converter (ADC) bit precision is analyzed on two types of UWB signals OFDM UWB and pulsed UWB all in the presence of Additive White Gaussian Noise (AWGN) and a narrowband interferer in the channel. This paper shows how probability of error and the bit resolut...

• Installation of a wideband " UWL " receiver covering the band 0.7 GHz to 4.0 GHz on the Parkes 64-m telescope, together with the 20cm Multibeam receiver, would allow more than 90% of current Parkes observations to be made with no receiver changes, greatly improving the efficiency of Parkes operations. • The digital receiver system could be configured for all types of pulsar observation (excep...

This thesis concerns the design of transmitter-receiver chains for wideband radar systems. The transmitter side employs one, or several, highly flexible signal generators, which are able to generate signals with a large bandwidth. At the receiver side, when we are are able to select receiver filters, we have the freedom to optimize also the receiver filters. Herein, the transmit waveforms and r...

In a conventional radar receiver errors are introduced due to mismatch between the ADCs and gain and phase mismatch in the I/Q demodulation. By performing the I/Q demodulation in the digital domain some of these errors are alleviated. In this paper several different filter structures suitable for digital I/Q demodulation are evaluated. Three different structures for such a digital down converte...

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An approach is proposed to the filtering of an additive mixture ultra-wideband chaotic signals and white Gaussian noise, in order retrieve useful signal receiver. The role filter performed by a passive frequency-selective circuit, identical one involved formation oscillations chaos generator. A mathematical model modulating generator, detecting receiving sequence radio pulses noisy channel desi...

Most high performance GPS receivers today are wideband. In most cases, they require the wider precorrelation bandwidth for enhanced multipath mitigation capability. Wideband receivers, however, are still significantly more susceptible to electromagnetic interference. In addition, they are more likely to produce unacceptably large pseudorange errors in the presence of satellite signal anomalies,...