Simulation of ultra‐wideband indoor propagation

Time-domain UWB transmission model for three-dimensional environments with low-loss obstacles

“…1) for different Rx positions, with dry concrete [11]. tangent which is generally true for various structures such as dryconcrete/dry-wall, brick-wall etc [2,7,9]. In many results from literature [9,18,30], it is evident that for many common building materials, the value of relative permittivity and conductivity are almost constant for a wide frequency range including the FCC approved UWB bandwidth.…”

“…L total,s,h (u) [11,12] represents the total propagation path-loss suffered by the transmitted field during transmission between Tx to Rx. The corresponding TD transmitted field through the building or wedge structure is given as e RX;s;h ðtÞz e inc ðtÞ r total *G total;s;h ðtÞ*l total;s;h ðtÞ (2) with '*' representing the convolution operator. G total,s,h (t) and l total,s,h (t) [11,12] are TD counterparts of T total,s,h (u) and L total,s,h (u)…”

“…In recent years, research in ultra wideband (UWB) propagation through indoor scenario has received great attention because of unique features of UWB communication like resilient to multipath phenomena, good resolution, high bit rates, accurate positioning and ranging, low power density, low complexity and low cost [1,2]. In radio propagation of UWB signals, especially in non-line-of-sight (NLOS) communication in deep shadow regions, transmitted field component proves to be very significant [3,4].…”

Ultra-compact parametric modelling of three-dimensional antenna radiation pattern for impulse radio-ultra-wide band ray tracing

“…Generally, RT simulation models that have been proposed so far for UWB radio channels, insert analytical expressions of measured/simulated antenna radiation patterns in the received signal formula [9][10][11]. For wideband frequency applications, describing an antenna over the full 4p steradians and all the frequency band of interest, leads to an extremely large amount of data that are required to be stored.…”

Characterization of building materials for propagation modelling: frequency and time responses

“…The challenge which is in progress in our laboratory [2] is to develop a wideband channel modelling based on deterministic approaches. Such a modelling will be all the more realistic since it includes pertinent information concerning construction materials and antenna characteristics [3]. This paper focuses on extracting frequency-dependent responses of building materials over an extremely wide band to build a database for ray-tracing simulations.…”