Thomas Zasowski

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— The paper presents UWB channel measurements from 3 to 6 GHz for a body area network (BAN) in an anechoic chamber and an office room. Both, transmit and receive antenna were placed directly on the body. Channel parameters as delay spread and path loss are extracted from the measurements and the influence of the body is highlighted. We show that in some(More)
— Due to the ongoing miniaturization of electronic devices and due to a multitude of applications, wireless body area networks (WBANs) have gained much interest recently. Ultra wideband (UWB) communication is one promising transmission technology for WBANs due to reduced hardware complexity. To optimize receiver structures and antennas for UWB WBANs it is(More)
— A wireless body area network with an average throughput of 500 kbps based on ultra-wideband pulse position modulation is considered. For a long battery autonomy a hardware aware system optimization with respect to the specific applications at hand is essential. A key feature to achieve power savings is low duty cycle signaling, and its effectiveness when(More)
— We consider an UWB PPM based wireless body area network with an average throughput of about 1Mbps. For a long battery autonomy a low duty cycle operation of the nodes and thus a high peak data rate is essential. Due to the moderate path loss a peak data rate in excess of 50 Mbps would be feasible within the FCC transmit power constraints. With current low(More)
— Transmitted-Reference (TR) receivers represent a low complexity alternative to RAKE receivers, which are widely used in Ultra Wideband (UWB) communications. Known TR schemes are not very energy efficient since two pulses represent one bit value only. Therefore, we present a TR Pulse Interval Amplitude Modulation (PIAM) scheme which reduces the required(More)
— To enable reliable transmission, UWB receivers have to cope with interference from several existing wireless services. Based on spectrum analyzer measurements we will show that stationary or quasi-stationary noise can be handled using a high pass filter. For a narrowband interferer (NBI) in close vicinity such a filtering is not sufficient since the(More)
Non-coherent receivers such as transmitted reference receivers recently attracted much interest due to the complexity of coherent ultra wideband (UWB) receivers. In this paper, we investigate the impact of channel state information (CSI) on UWB transmitted reference (TR) maximum likelihood (ML) receivers in the presence of a UWB co-channel interferer (CCI).(More)