An advanced base station receiver concept for DECT

The concept of a simple non-coherent equaliser receiver for DECT, as a means to obtain robust performance in outdoor and large indoor applications is discussed. This simple structure renders the receiver insensitive to dispersion but cannot substitute diversity in flat fading channels. The authors describe practical approaches leading to a high performance base station receiver for DECT-type systems, based on the above concept. It is shown that a significant portion of the DECT preamble is not required by the present equaliser receiver, and that this interval can be used to emulate ideal selection diversity (without the need for two parallel receivers). In addition, the authors also introduce an approach to further extend the receiver's frequency offset tolerance. They therefore propose a novel integrated structure that performs both equalisation and selection diversity in a single base station receiver. It is shown through simulation that this receiver provides robust radio performance.