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Realization and characterization of a 2.4 GHz radio system based on frequency offset division multiple access

The ultra-wideband communication systems that appear on the market at this moment are based on transmitting streams of extremely short pulses. A problem with this technique is synchronization of the receiver. In the Telecommunication Engineering group of the University of Twente a lot of research has been done on the coherence multiplexing technique for the optical domain. The coherence multiplexing technique can also be used in the RF domain. Two techniques have been developed: Time offset division multiple access (TODMA) and Frequency offset division multiple access (FODMA). In this report, results of extensive simulations in a microwave simulation 
program are presented. The simulations show the behavior as predicted by theory. A testbed has been built and the performance of this testbed is thoroughly examined. As a consequence of signal losses and leakage in components, there is a discrepancy between the predictions from simulations and practical measurements. Apart from this discrepancy, the system shows the expected behavior.