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Cognitive Radio (CR) Technology has emerged for the future of wireless communications, its key parameters of interest are frequency, power and modulation techniques. The Spectrum Sensing is an important task to determine the availability of the vacant channels. In Multicarrier Communication using Digital Signal Processing Techniques, Filter Bank Multi Carrier (FBMC) has an edge over other technologies...
In this paper, we introduce the impact of non-linear high-power amplifier (NL HPA) on the bit error rate (BER) and on the spectrum efficiency of multicarrier techniques. A comparison between two multicarrier transmission techniques based on cognitive radio (CR) is presented: the classical orthogonal frequency division multiplexing (OFDM), based on cyclic prefix (CP), and the filter bank-based multicarrier...
A 4 Gbit/s radio link using impulse-based on-off keying at 60 GHz is demonstrated. The input baseband signals are transferred to radio frequency wavelets through direct conversion, by switching a GaAs gated tunnel diode oscillator on and off. The wavelet generator drives an antenna directly without any buffer or power amplifier. The peak output power is -11 dBm at a power consumption of 30 mW. The...
Medical industry is potentially a big market for the wireless applications in the coming years. As the number of elder people is increasing, the need for various wireless body monitoring and measurement equipment is increasing as well. However, having any kind of electronic device next to the human body, or even inside of a body, faces challenges. For wireless body area network (WBAN) solutions, the...
In an Ultra-WideBand (UWB) Low-Rate (LR) Wireless Personal Area Network (WPAN) application low-cost, low-power and low-complexity systems are expected to meet the requirements of the typical applications. These demands can only be satisfied by simple modulation schemes and easy to implement noncoherent receiver configurations. However performed field tests showed that the noise performance of such...
In this paper, we propose a novel autocorrelation receiver (AcR) for transmitted-reference signaling that alleviates excessive noise collection. Specifically, we employ a stop-and-go strategy based on energy detection in the AcR to selectively collect portions of effective signal. This avoids noise collection from time regions within the integration interval that do not contain useful energy contributions...
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