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Recently, the LTE (Long Term Evolution) and LTE-Advanced systems, developed by the 3GPP (Third Generation Partnership Project), has been proposed as the candidate for the 4G systems (forth mobile communication systems). The combination of OFDM (orthogonal frequency division multiplexing) and MIMO (multiple-input multiple-output) transmission technologies has been introduced into LTE systems for achieving...
Closed-loop transmission combined with MIMO (multiple-input multiple-output) and OFDM (orthogonal frequency division multiplexing) technologies have drawn most attentions during development of the 4G systems (fourth generation of mobile communication systems). In LTE (Long Term Evolution) and LTE-Advanced systems, which are proposed by 3GPP (Third Generation Partnership Project) to be the most competitive...
The 3GPP (Third Generation Partnership Project) LTE (Long Term Evolution) and LTE-Advanced activities work toward the evolved UMTS (Universal Mobile Telecommunications System) Terrestrial Radio Access (E-UTRA), and the solution of IMT-Advanced (International Mobile Telecommunications) and systems beyond. The combination of OFDM (orthogonal frequency division multiplexing) and MIMO (multiple-input...
Spectrum sensing is a central part in a cognitive radio and therefore a thorough design of a spectrum sensor is of highest priority. Here, a novel implementation of a spectrum sensing technique, using a generalized version of the Neyman Pearson test, is considered. This novel implementation overcomes the usual prerequisite of the known noise power. This benefit is achieved by normalizing the signal...
To support high definition television (HDTV), the revision of DVB-T, the terrestrial digital video broadcasting standard, has recently been developed under the abbreviation DVB-T2. The provision of the anticipated high data rate services requires a highly accurate synchronization and frequency acquisition and tracking. Setting out from the procedure defined by the DVB-T2 implementation guidelines...
Cognitive radios require spectrum sensing. IEEE 802.22 defines constraints on conceivable spectrum sensing techniques. In order to fulfill theses constraints on the required detection probability and allowed false alarm probability, the signal sensing requires a certain sensing time period and an appropriately adjusted decision threshold. This manuscript presents a novel dynamic spectrum sensing scheme...
In the recent years, Bluetooth has become an important short range transmission system which provides data rates up to 3 Mbit/s in its enhanced data rate mode (EDR). In this communication, the authors will illustrate low-cost intermediate frequency (IF) zero-crossing detector (ZXD) for Bluetooth EDR. The IF ZXD facilitates analog signal processing at low IF and the digitization is carried out by a...
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