Uwe Lambrette

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|For burst oriented data transmission over frequency selective fading channels, the problem of optimum frame synchronization is discussed. A new criterion for frame synchronization accuracy is derived. In the following, we propose new algorithms that allow to estimate the frame start of a data packet transmitted over a noisy unknown dispersive fading(More)
We suggest two algorithms that allow e cient timing recovery for MSK based on the computation of the Fourier spectrum of the absolute value of the di erential phases. One is suited for parallel frequency estimation while the second is less complex but requires previous frequency correction. The algorithms are investigated using both analysis and simulation.(More)
In this contribution we describe the use and implementation of a new tool allowing the joint simulation of MATLAB and COSSAP 1 routines. In order to achieve this, the MATLAB simulation process is controlled from COSSAP via named pipes. Our tool provides the user with automatic and exible interface generation. Any MATLAB function can be mapped on a COSSAP(More)
In this paper, we propose a burst frequency synchronization procedure which is based on the usage of single{carrier training data and OFDM payload modulation. The payload modulation format is similar to the one that is used in the DAB standard 1], whereas training data is chosen as simple CAZAC sequences. It is shown that the resulting modulation and(More)
Modeling of the mobile radio channel is considered. Starting from a physical model, a frequency domain description of the channel is obtained. It is then shown that the effect of fading and dispersion can be entirely modeled using frequency transform techniques. Due to the bandlimitation of the simulated stochastic processes, the channel impulse response(More)
as simple implementation and is suited for use in broadcast networks due to the exploitation of the capture phenomenon. During the design process we utilized a novel methodology involving multirate dynamic data ow system level simulation, exploitation of a generic VHDL based implementation library, automatic VHDL generation based on the data ow description(More)
We present a di erential MSK receiver with coarse frame synchronization using a RSSI Signal and thus allowing the use of the capture phenomenon. The capture event is detected by an ML{derived circuit. Our investigations include all synchronization units allowing a tradeo between preamble length and implementation efciency. We provide a performance study(More)