Noncoherent Equalizer for DECT System
2010
Digital European Cordless Telecommunication (DECT), as a standard for cordless indoor wireless communication in
Europe, is widely used in hospitals, offices and factories. But its performance can be constrained by channel
dispersion, and this can limit the use of DECT system in reflective environments. In this master thesis project,
non-coherent equalization schemes are investigated. Different equalization algorithms are simulated in Matlab
and a least mean square (LMS) algorithm based baseband equalizer is implemented in a field programmable gate
array (FPGA). But this method is proved insufficient to solve the severe multipath fading problem. Another type
of equalizer called passband equalizer is stated afterwards, and a required bit error rate (BER) can be achieved
in multipath fading channels up to 500 ns delay spread.
This project includes both simulation and hardware implementation. In this thesis, simulations of two types of
equalization methods (LMS baseband and passband equalizer) and implementation of the LMS baseband equalizer in
FPGA are introduced. The challenge of future work and its possible refinement are also analyzed.
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