32 results about "Line-of-sight propagation" patented technology

A intelligent backhaul system is disclosed to manage and control multiple intelligent backhaul radios within a geographic zone. The intelligent backhaul system includes multiple intelligent backhaul radios (IBRs) that are able to function in both obstructed and unobstructed line of sight propagation conditions, one or more intelligent backhaul controllers (IBCs) connecting the IBRs with other network elements, and an intelligent backhaul management system (IBMS). The IBMS may include a private and / or public server and / or agents in one or more IBRs or IBCs.

A intelligent backhaul system is disclosed to manage and control multiple intelligent backhaul radios within a geographic zone. The intelligent backhaul system includes multiple intelligent backhaul radios (IBRs) that are able to function in both obstructed and unobstructed line of sight propagation conditions, one or more intelligent backhaul controllers (IBCs) connecting the IBRs with other network elements, and an intelligent backhaul management system (IBMS). The IBMS may include a private and / or public server and / or agents in one or more IBRs or IBCs.

A intelligent backhaul system is disclosed to manage and control multiple intelligent backhaul radios within a geographic zone. The intelligent backhaul system includes multiple intelligent backhaul radios (IBRs) that are able to function in both obstructed and unobstructed line of sight propagation conditions, one or more intelligent backhaul controllers (IBCs) connecting the IBRs with other network elements, and an intelligent backhaul management system (IBMS). The IBMS may include a private and / or public server and / or agents in one or more IBRs or IBCs.

A intelligent backhaul system is disclosed to manage and control multiple intelligent backhaul radios within a geographic zone. The intelligent backhaul system includes multiple intelligent backhaul radios (IBRs) that are able to function in both obstructed and unobstructed line of sight propagation conditions, one or more intelligent backhaul controllers (IBCs) connecting the IBRs with other network elements, and an intelligent backhaul management system (IBMS). The IBMS may include a private and / or public server and / or agents in one or more IBRs or IBCs.

A channel characteristic analyzing apparatus that can ensure modeling of a more adequate propagation path by processing position parameters needed in a two-wave model which is used as a line-of-sight propagation path model in a stochastic manner is provided. The channel characteristic analyzing apparatus for analyzing the propagation channel characteristics of a reception apparatus 11b which has received a radio signal of a millimeter wave band, transmitted from a transmission antenna 13a of a transmission apparatus 11a, via a reception antenna 13b, includes computation means which computes h(t) expressed by the following equation (1) as a channel response to the propagation channel characteristic.h(t)=βδ(t)  (1)where β is derived as a result of processing the position parameters needed also in the two-wave model in the stochastic manner.

A chemical gas phase deposition process comprises steps of providing a high vacuum chamber, and inside the high vacuum chamber: positioning a substrate surface; positioning a mask parallel to the substrate surface, whereby the mask comprises one or more openings; adjusting a gap of determined dimension between the substrate surface and the mask; and orienting a plurality of chemical precursor beams of at least one precursor species towards the mask with line of sight propagation, each of the plurality of chemical precursor beams being emitted from an independent punctual source, and molecules of the chemical precursor pass through the one or more mask openings to impinge onto the substrate surface for deposition thereon. At least a part of the chemical precursor molecules decompose on the substrate surface at a decomposition temperature. The process further comprises adjusting a temperature of the substrate surface greater or equal to the chemical precursor molecule decomposition temperature, thereby remaining greater than a mask temperature, and maintaining the mask temperature below the decomposition temperature, thereby causing a decomposition of the chemical precursor and a growth of a film on the substrate surface, but not on the mask; and heating the substrate surface using a heating device.

The invention provides a method and device for recognizing a line-of-sight propagation path of wireless signals. The method includes the steps that CSI corresponding to each antenna is obtained from the received wireless signals to be detected; the variance of the phase differences between each antenna and the other antennas is calculated according to the CSI corresponding to each antenna; the phase difference factor corresponding to each variance is calculated according to a first formula (please see the first formula in the specification), and the mid-value of all the phase difference factors is calculated; whether the mid-value is smaller than or equal to a preset phase difference factor threshold value or not is judged, if yes, line-of-sight propagation of the wireless signals is determined, and otherwise non-line-of-sight propagation of the wireless signals is determined. Through the method and the device, the line-of-sight propagation path of the wireless signals can be recognized in real time in a wireless network with the bandwidth limited extremely.

The embodiment of the invention provides a method and a device for identifying non-line-of-sight propagation and a base station. The method comprises the following steps of: obtaining the channel power spectrum corresponding to each group of signals according to K groups of signals transmitted by MS (Mobile Station) received in a preset period to obtain K groups of channel power spectrum, whereinK is greater than a first threshold which is a positive integer; determining N channel power spectrum subsets according to the K groups of channel power spectrums, wherein N is less than K; obtainingN accumulated channel power spectrums according to N channel power spectrum subsets and obtaining the extreme value position of the N accumulated channel power spectrums; obtaining the first standarddeviation of the signal transmission distance between MS and BS (Base Station) according to the N extreme value positions; and identifying whether non-line-of-sight propagation occurs between the MS and BS or not according to the magnitude relation between the first standard deviation and the second standard deviation. The technical scheme ensures that the first standard deviation with higher precision between the MS and BS can be obtained so as to effectively improve the identifying accuracy of the non-line-of-sight propagation environment.

The invention provides a relay emergency wireless data communication frame. A relay net is formed by a single low-altitude relay platform; the relay platform is hung below a balloon tied on a rope fixed on a trolley; and an application scene is a land cellular network with one part of damaged base stations and fewer base stations (reserved base stations) which can realize physical connection. A low-altitude relay physical layer can utilize a cognitive radio technology to detect signal frequency spectrums of the reserved base stations so as to carry out radio resource management of emergency data communication; the relay platform can realize following functions: 1) connection close to line-of-sight propagation is provided for a land user; 2) the position of the relay platform is adjusted to guarantee that links among the relay platform and a plurality of land base stations have better channel quality; 3) a certain cognitive radio function is realized; 4) communication with an external network is realized by a gateway which is used as the reserved base station.

The present invention is a viewing device (40) for positioning in front of a locay display (18) of an industrial transmitter (10). The viewing device (40) has optics (42) that receive light from the local display (18) along a first line of sight, redirect the light, and transmit the light along a second line of sight. The second line of sight is disposed at an angle relative to the first line of sight.

The invention discloses a positioning method for inhibiting non-line-of-sight error and a mobile table, and relates to the technical field of wireless positioning. The positioning method comprises the following steps: the mobile table acquires position coordinate information of three base stations and multi-group propagation time measurement values, wherein each group propagation time measurement value comprises the propagation time between the mobile table and each base station; the mobile table determines the error between the non-line-of-sight and the line-of-sight corresponding to each group propagation time measurement value based on a geometrical distance constraint relation between the mobile table and each base station and the position coordinate information of each base station; the mobile table selects one group propagation time measurement value, which enables the error between the non-line-of-sight and the line-of-sight to minimum, for mobile table positioning. Therefore, multi-group measurement values are acquired and the measurement value most approach to the LOS propagation is screened out based on a geometrical constraint relation, which should be satisfied under the line-of-sight propagation environment, of the mobile table and the base station, the measurement value error caused by NLOS is effectively reduced, and the advanced sampling is unnecessary, and the efficiency is higher.