SFN Channel Measurements in Brazil
نویسندگان
چکیده
In this paper, field measurements carried out in a suburban SFN network with two synchronized transmitters are reported. It is found that the radio signal coverage of the distributed transmission scheme is distinctly improved when compared to a single transmitter system. The path loss gain and improvement associated to the SFN scheme are obtained as well as the multipath channel parameters including the mean and RMS delay spread. A tapped delay line is used to model the average power delay profile (PDP) in the distributed transmission cases and shows rather different features than the single transmission case.
منابع مشابه
Gain of function Naν1.7 mutations in idiopathic small fiber neuropathy.
OBJECTIVE Small nerve fiber neuropathy (SFN) often occurs without apparent cause, but no systematic genetic studies have been performed in patients with idiopathic SFN (I-SFN). We sought to identify a genetic basis for I-SFN by screening patients with biopsy-confirmed idiopathic SFN for mutations in the SCN9A gene, encoding voltage-gated sodium channel Na(V)1.7, which is preferentially expresse...
متن کاملDigital Terrestrial Television Broadcasting (DTTB)
A report on the digital terrestrial television broadcasting system (ISDB-T: Integrated Services Digital Broadcasting-Terrestrial) was presented to the Minister of Post and Telecommunication by the Telecommunications Technology Council (TTC) in May 1999 after the largescale field trials conducted by the Association of Radio Industries and Businesses (ARIB). At the ITU-R Study Group 11 Meeting in...
متن کاملMarine Octocoral Phyllogorgia dilatata: Identification of Sesquiterpenes and Activity as a Natural and Renewable Corrosion Inhibitor
In the context of highly efficient, non-toxic and natural organic corrosion inhibitors, Phyllogorgia dilatata was studied as an anticorrosive for mild steel in acid medium. The marine octocoral crude extract (PDCE) was characterized and analyzed by LC-HRMS, revealing the presence of 16 different organic molecules. The corrosion inhibition was evaluated via weight loss study and electrochemical ...
متن کاملGenetic aspects of sodium channelopathy in small fiber neuropathy.
Small fiber neuropathy (SFN) is a disorder typically dominated by neuropathic pain and autonomic dysfunction, in which the thinly myelinated Aδ-fibers and unmyelinated C-fibers are selectively injured. The diagnosis SFN is based on a reduced intraepidermal nerve fiber density and/or abnormal thermal thresholds in quantitative sensory testing. The etiologies of SFN are diverse, although no appar...
متن کاملSmall-fiber neuropathy Nav1.8 mutation shifts activation to hyperpolarized potentials and increases excitability of dorsal root ganglion neurons.
Idiopathic small-fiber neuropathy (I-SFN), clinically characterized by burning pain in distal extremities and autonomic dysfunction, is a disorder of small-caliber nerve fibers of unknown etiology with limited treatment options. Functional variants of voltage-gated sodium channel Nav1.7, encoded by SCN9A, have been identified in approximately one-third of I-SFN patients. These variants render d...
متن کامل