201results about How to "Reduce fading" patented technology

Satellite radioterminal communications systems, methods and components thereof, can use multiple frequency segments of at least one satellite frequency band, multiple air interfaces, multiple spectrum reuse cluster sizes and/or multiple geographic cell sizes. For example, a space-based component is configured to communicate with first radioterminals in first satellite cells over a first frequency segment of a satellite frequency band, such as a first frequency segment of a satellite L-band, and to communicate with second radioterminals in second satellite cells over a second frequency segment of the same or different satellite frequency band. The space-based component also may be configured to communicate with a first radioterminal over a first air interface and to communicate with the second radioterminals over a second air interface.

An optical system and method includes a source-free optical network unit coupled to an optical fiber for receiving a centralized lightwave carrier signal with downstream data over the optical fiber. The optical network unit includes a coupler configured to split the original carrier signal into a first path and a second path. The first path includes an optical filter configured to reduce fading effects of the carrier signal. The second path includes a modulator configured to remodulate the centralized lightwave carrier signal with upstream data to produce an upstream data signal for upstream transmission.

In a wireless communication system the receiver includes a first plurality of receive chains and a second plurality of antennas. Each receive chain is selectively connectable to selected antennas. The antennas are selected based on criteria obtained from a received RF signal to produce an antenna configuration connected to the receive chains to reduce RF fading at the receiver. An electronic switch connects the antennas to the receive chains. The receiver is programmed to determine which antenna should be connected to each receive chain by the switch by measuring characteristics of the received signal for each allowed antenna configuration and selecting the best antenna configuration. Transmitters may be similarly configured.

An active antenna element to transmit and/or receive RF (Radio Frequency) signals is positioned in relation to a backplane that reflects RF signals. One or more passive antenna elements can be disposed on a similar side of the backplane as the active antenna element. Settings of the one or more passive antenna elements are adjusted to produce an input/output beam pattern that varies depending on whether the at least one passive antenna element is reflective or transmissive. Based on this technique, an RF input output beam pattern of an antenna assembly including the backplane, active antenna element and passive antenna elements can be controlled for better reception and transmission of RF signals.

A method and apparatus for interference suppression in wireless communication systems, especially Orthogonal Frequency Division Multiplexed (OFDM) systems. The array apparatus includes a two-tier adaptive array system which provides for both spatial diversity and beamforming at the uplink. The adaptive array is comprised of sub-arrays spaced at a distance sufficient to provide spatial diversity, ideally 5 to 15 wavelengths at the frequency of operation. Each sub-array is composed of at least two antenna elements spaced in proximity sufficient to provide effective beamforming or scanning, ideally less then one-half of one wavelength at the frequency of operation. The Direction of Arrival (DOA) of signals impinging upon the array can be calculated by comparing signals from sub-array elements. Each sub-array can then be filtered or beamformed so as to provide high gain to desired signals received from the DOA (which may be a multipath signal) while at the same time damping out undesired signals such as co-channel interference (CCI) in the frequency band of operation. The DOA is also used in a method of allocating frequency bins for data signals, such as in an OFDMA system, to provide weighted guidelines for bin allocation to maximize received signal power.

The object of the present invention is to improve the quality of picture in the image. According to the present invention, by forming the luminance signal of pixel based on red signal, green signal and blue signal per pixel of video signal by the luminance signal forming means and detecting the saturation per pixel of the video signal by the detection means, and compression processing the red signal, green signal and blue signal of the corresponding pixel without changing the hue and saturation but changing the brightness of pixel based on the luminance signal and the detection result of the saturation of the corresponding pixel by the compression processing means, and by controlling signal levels of red signal, green signal and blue signal compression processed by the compression processing means as necessary without changing hue and luminance but changing saturation of pixel by the control means, the red signal, green signal and blue signal can be compression processed with greatly reduced color fading of pixels and the image can be prevented from losing the chromatic tone. And thus, the video signal processing device and its method capable of improving the quality of picture in the image can be realized.

The invention relates to a power control method and a cellular radio system used for power control, comprises at least one subscriber terminal, one base station and means for changing the step size to be used for power control. The means receive information on the speed of the subscriber terminal and the cellular radio system uses a fading channel. The means change the step size to be used for power control on the basis of the information on hte speed of the subscriber terminal for diminishing fading in the channel.

The invention discloses a drying and color-retaining method for camellia petals. The drying and color-retaining method comprises the following steps of: soaking bright red, full and half-opened camellia flowers without black spots in a shape protection liquid for 20 minutes after the camellia flowers are picked off to protect the shape of the camellia petals and prevent the camellia petals from being oxidized to generate color spots, picking off the petals from the camellia flowers after the shapes of the camellia petals are stable, soaking the petals in a tartaric acid solution to protect the stable colors of the petals so that the petals are hard to fade away and can still keep bright colors during enzyme deactivation and drying; and carrying out microwave/steam enzyme deactivation treatment, rapidly deactivating the oxidizing enzymes in the petals to reduce the decompression of nutrients, and drying the petals at 40-70 DEG C till the water content of the petals is less than or equal to 10% to obtain dried camellia petals. Therefore, the drying and color-retaining method for camellia petals, disclosed by the invention, has the advantages of low color fading degree, no color spots, stable shapes of the petals and better toughness of the petals.

An improved chlorination system for pools, spas, potable water supplies, and the like, provides a vertically oriented electrolytic cell connected between a pump and a lightly salinated pool. The cell preferably contains a metallic electrode, such as titanium, and a precious metal coated titanium electrode, and has means for passing an electric current through the cell. The present invention further provides a novel electrode stack design, conducive for forming an efficient chlorinator comprising a plurality of interconnecting electrode stacks of separate electrical cells.

The invention discloses a production process of colorful soft denim. The production process comprises the specific steps as follows: pre-treating; feeding cloth-immersing in water and penetrating-straightening weft; and overfeeding-drying-dyeing-dehydrating-washing with ferment-washing and whitening-feeding a softening agent-sizing. By virtue of the process, the air permeability can be effectively improved, the light shading property is reduced, the perspective property of a fabric is avoided and an ultra-soft denim fabric with soft and light texture is prepared; a condition that the denim is faded can be effectively reduced, the stability of the shrinkage rate and the gram weight of the denim are guaranteed and the sizing property is good; and an optimal fabric condition is created for clothes manufacturing. Meanwhile, the problems of traditional denim that the color is single, a fabric surface style is dull and visual impact is lacked are solved, and the trend of times is adapted.

The invention discloses a bidirectional relay transmission system and method. The transmission method comprises the following steps of: in the multiple access transmission time slot, all the users pre-code the signal vectors to be transmitted and simultaneously transmit the pre-coded information flow to a relay node; the relay node receives the signals and decodes the received signals based on physical layer network codes; and in the broadcast time slot, first relay-user joint pre-coding design is carried out and then the relay node broadcasts the pre-coded signals to all the users; and the users demodulate the received signals and extract the required signals according to the signals transmitted by themselves in the previous time slot. By adopting the system and the method, the multi-antenna X-shaped bidirectional transmission system which completes terminal information exchange of the two users in two time slots is realized, the degree of freedom of the system is maximized and the system performances are promoted.

A transflective liquid crystal display is provided which includes a color-filter substrate, an active matrix substrate, and a liquid crystal layer interposed between them. The active matrix substrate includes a first transparent substrate and includes a plurality of switching devices, a plurality of transparent pixel electrodes and a plurality of reflective pixel electrodes formed on the first transparent substrate. The color-filter substrate includes a second transparent substrate, a first and second transparent conducting layers and a dielectric layer. The first transparent conducting layer is interposed between the second transparent substrate and the second transparent conducting layer, and the dielectric layer is interposed between the first and second transparent conducting layers. The second transparent conducting layer in each pixel area has at least one opening. The openings positionally correspond to the reflective pixel electrodes.

A health-care Chinese medicine for regulating metabolism, qi and blood, nourishing viscera, and beautifying skin is prepared from 22 Chinese-medicinal materials including wolfberry fruit, astragalus root, Chinese angelica root, fleece flower root, etc.

The invention relates to the field of electrical exploration and to the methods of determination of subterranean formations properties by means of electric parameters of subterranean formations measuring and separating of the parameters measured. The invention can be applied both in surface and marine electrical exploration using controlled sources of electromagnetic field, and is used in gas and oil exploration for searching and delimitation of oil and gas reservoirs basing on segregation of response from stratum, secondarily changed due to hydrocarbons migration, to split the measured signal to available components. The invention provides for a set of techniques that enable a layer-by-layer determination of geoelectrical parameters values, as well as process characteristics of induced medium polarization and electromagnetic induction.

Hair care compositions are disclosed which comprise a silicone polyurethane polymer, an ester, and a fluorosilicone. The compositions are useful for improving color retention of artificially colored hair.

The invention discloses a preparation method of bombax ceiba three-dimensional dried flowers. The preparation method comprises following steps: (1), pretreatment, wherein fresh bombax ceiba flowers are immersed in a color retention agent so as to maintain original color and quality of bombax ceiba flowers in subsequent drying processes, and the color retention agent is a mixture of citric acid and glycerin; (2) embedding, wherein gaps of the bombax ceiba flowers processed via step (1) are filled with degreasing cotton, the whole bombax ceiba flowers are coated with degreasing cotton, and the obtained bombax ceiba flowers are coated with granular silica gel; (3) drying, wherein vacuum freeze drying or refrigerator freeze drying are used to dry the coated bombax ceiba flowers so as to remove water in the bombax ceiba flowers; and (4), the granular silica gel and the degreasing cotton are removed so as to obtain the bombax ceiba three-dimensional dried flowers. The preparation method is used for preparing the bombax ceiba three-dimensional dried flowers; original shape, color, texture, softness, and straight shape of the bombax ceiba flowers are basically maintained; the bombax ceiba three-dimensional dried flowers can be further made into bombax ceiba three-dimensional dried flower souvenirs in forms of single flower, flowering branch, or other forms; and supply of the bombax ceiba flowers all year round becomes possible.

The invention discloses a preparation method of a PE (Poly Ethylene)/EVA (Ethylene Vinyl Acetate) composite fabric. The preparation method comprises the following steps: a, selecting materials; b, shaping base cloth; c, primarily fractioning and coloring the front surface; d, primarily fractioning and coloring the back surface; e, secondarily fractioning and coloring the front surface; f, attaching EVA on the front surface; g, secondarily fractioning and coloring the back surface; h, attaching EVA on the back surface; and I, cooling and winding. According to the preparation method of the PE/EVA composite fabric, the PE fabric is used as the base cloth; colorless EVA films are used; the composite fabric is produced by the steps of shaping the base cloth, primarily fractioning and coloring the front surface, primarily fractioning and coloring the back surface, secondarily fractioning and coloring the front surface, attaching EVA on the front surface, secondarily fractioning and coloring the back surface, attaching the EVA on the back surface, cooling and winding; the produced PE/EVA composite fabric is relatively even, stable, bright in color, capable of effectively slowing the fading, and durable in use.

Biocide compositions capable of increasing the fading resistance of a coating material, which compositions preferably comprise a nano-sized halogenated benzonitrile and a nano-sized zinc oxide, are disclosed. Coating compositions, which comprise the biocide compositions, binders, and pigments are disclosed. The biocide compositions are particularly suitable for use in paints. Methods for reducing the fading of pigmented coating compositions upon exposure to light are also disclosed.

A composition, method, and system for recording an image. The system includes a multiphase imaging material in which energy is absorbed by an antenna material. The absorbed energy causes the reaction of an activator and a color-forming material to form a mark. A fixer is employed to retard the fading of the mark.

The invention discloses a preparation method of a novel wood-plastic composite material capable of greatly improving the weather resistance. The preparation method comprises the following steps: uniformly mixing the thermoplastic plastics, wood fibers, high-temperature lubricating agent and high-temperature coupling agent according to a ratio to obtain a mixed material; and carbonizing granulating, carbonizing extruding, conventionally cooling, stretching and cutting to obtain the wood-plastic material, wherein the carbonizing granulating temperature and the carbonizing extruding temperature are 250 to 290 DEG C. The surface and sections of the wood-plastic composite material are black, have metal luster and have metal sound when being knocked; the heat expansion and cold shrinkage deformation is small, and the thermal deformation temperature is greatly increased; the moisture absorption performance is significantly reduced, the corrosion and decomposition are unlikely to occur, and the weather resistance is good; and the ultraviolet resistance is improved.