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The phenomenon of multipath propagation has contributed significantly towards deterioration of quality of signal received in a wireless communication system. Several techniques for multipath mitigation are in use in the current wireless communication technology standards. With the steady rise in the number of wireless devices active in the environment, the concept of beamforming has also gained popularity...
Pulse position modulation (PPM) is a popularly adopted modulation scheme in the impulse radio based ultra wideband (UWB) systems. In order to shape the spectrum of the signal, a time dither on generated pulses leading to so-called Time Hopping UWB (TH-UWB) is introduced. Although of many advantages, the TH-PPM scheme faces serious challenges which are the cross modulation interference (CMI) and the...
In this paper we consider the coexistence issue between OFDM-based WLANs of the 802.11a family and time-hopping ultra wideband (TH-UWB) systems. A general analytical expression is provided for the bit error rate (BER) of the OFDM transceiver operating in the presence of UWB interference and the interferences caused by the multipath propagation phenomenon on the 802.11a OFDM signal, comprising intersymbol...
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