The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Pulse position and frequency modulation (PPFM) is proposed as a new modulation to mitigate narrow-band interferences (NBIs) in multiband wireless communications. PPFM is proposed based on conventional pulse position modulation (PPM), where in PPFM position of a pulse is changed both in time and frequency. Then we propose a demodulating (receiving) algorithm for PPFM modulated signal which makes it...
This paper (1) presents a new centralized collaborative sensing technique for cognitive radio systems which combines algebraic tools and compressive sampling techniques. The proposed approach consists of the detection of spectrum holes using spectrum distribution discontinuities detector fed by compressed measurements. The compressed sensing algorithm is designed to take advantage from the primary...
In this paper, we consider the problem of measurement allocation in a spatially correlated sensor field. Our objective is to determine the probability of each sensor's being measured for improved observability; the sensor located at less correlated area should be assigned more probability. To this end, we quantify the level of correlation of each sensor through the mutual information criterion reflecting...
Impulse radio ultra-wideband (IR-UWB) communication is a strong candidate for short range wireless sensor networks (BWSN). One of the biggest challenges in IR-UWB is to suppress the performance degradation due to concurrent narrowband interferences (NBIs). There are two main possible ways of NBI suppression, namely, cancellation and avoidance. The former is difficult to be implemented since it makes...
Impulse radio-ultra wideband (IR-UWB) communication is a strong candidate for short-range biomedical wireless sensor networks (BWSN). In this paper, we propose a multiband/multiuser IR-UWB scheme, which is robust against unknown narrowband interference (NBI), by deploying multiband signaling with forward error correction (FEC) coding and subband scheduling. We define our problem with an n-transmitter...
Impulse radio-ultra wideband (IR-UWB) communication technique is considered as a strong candidate for short range biomedical wireless sensor networks (BWSN). Coexistence with other systems in the ISM band is important, where narrow band interference (NBI) can become a threat to this system. This paper proposes a method to increase robustness of IR-UWB system in the existence of NBI. This method takes...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.