Ihan Martoyo

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Adaptive networks are envisaged to play a significant part in the future, where the time and space variations in the traffic pattern will necessitate the ability to continuously amend the Radio Access Technologies' (RATs') operating parameters. Reconfiguration of communications systems is a facilitator towards this convergence and enables the dynamic(More)
Public mobile radio spectrum has become a scarce resource while wide spectral ranges are only rarely used. Here, we consider a new strategy called Spectrum Pooling (SP) enabling public access to these spectral ranges without sacrificing the transmission quality of the actual license owners. By temporarily leasing their spectrum during idle periods the(More)
The paper introduces a two stage multiuser detector for CDMA downlink systems. Frequency domain equalization (FDE) is used at the first stage as a single-user detector. A RAKE receiver is then employed at the second stage, following a parallel interference cancellation (PIC) process. The performance of the FDE-RAKE detector is evaluated in a UTRA-TDD(More)
One of the main advantages of ultra wide band (UWB) systems is the extreme time resolution due to the huge bandwidth of several GHz. This allows the distinction between many different propagation paths in multipath environments and thus transmits with very low power. In order to benefit from the advantages of UWB, accurate estimations of the current channel(More)
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