Scopus İndeksli Yayınlar Koleksiyonu

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Browsing Scopus İndeksli Yayınlar Koleksiyonu by Journal "2013 21st Signal Processing and Communications Applications Conference, SIU 2013"

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    MP-SAGE based channel estimation for underwater cooperative OFDM systems
    (2013) Şenol, Habib; Senol, H.; Panaytrel, E.; Uysal, M.
    In this paper, an efficient ehannel estimation algorithm is proposed fOl' amplify-And-forward (AF) eooperative relay based orthogonal fl'equency division multiplexing (OFDM) system in the presenee of sparse underwater aeoustic ehannels and of the cOITelative non-Gaussian noise, The algorithm is based on the eombinations of the matching pursuit (MP) and the spaee- alternating generalized expectation-lnaxiInization (SAGE) teehnique, to impl'ove the estimates of the ehannel taps and their loeation as weil as the Gaussian mb.."ture noise distribution paramete..s in an itel'ative way, Computer simulations show that underwater aeoustie ehannel is estimated very effectively and the proposed algorithm has exeellent symbol error rate (SER) and ehannel estimation performance, as eompared to the existing ones,. © 2013 IEEE.
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    A new technique for OFDM: OFDM-index modulation
    (2013) Basar, E.; Panayırcı, Erdal; Aygölü, Ü.; Panayırcı, Erdal
    In this study, a novel scheme called orthogonal frequency division multiplexing with index modulation (OFDMIM) is proposed for frequency selective channels. In this scheme, the information is conveyed not only by only M-Ary signal constellations as in classical OFDM, but also by the indices of the active subcarriers, which are determined according to the information bits. Different transceiver structures have been investigated for the proposed scheme and it has been shown via computer simulations that OFDM-IM system achieves significantly better error performance than the classical OFDM. © 2013 IEEE.
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    Primary User Detection in Ieee 802.15.4a Based Wireless Sensor Networks
    (2013) Sabucu, Y.; Erküçük, Serhat; Erküçük, S.
    Ultra wideband impulse radio (UWB-IR) technology has been defined in the IEEE 802.15.4a standard for location and ranging applications. In this paper, UWB-IR sensors are considered in wireless sensor networks (WSNs) with two different IEEE 802.15.4a based signalling; (i) binary pulse position modulation (BPPM) and (ii) combined BPPM/binary phase shift keying (BPPM/BPSK) modulation, for the detection of primary users. In addition to the modulation effects, the effects of each sensor's false alarm and misdetection performances and the effect of signal-to-noise ratio (SNR) of the sensor-fusion center link have been investigated. For practical implementation of the WSN, some suggestions have been provided. © 2013 IEEE.