660 results about "Full band" patented technology

An apparatus, system, and method are disclosed for rapid wireless network association. The apparatus includes a logic unit containing a plurality of modules configured to functionally execute the necessary steps of conducting a preliminary full band search on a predefined frequency spectrum to identify the frequency of an active communication channel, investigate the availability of the active communication channels identified during the preliminary search, and associate with a wireless network device on the available active communication channel. These modules in the described embodiments include a search module, an investigation module, and an association module. Beneficially such an apparatus, system, and method provide for more efficient searching, scanning, and association than typically found in wireless networks.

A technique for concealing the effect of a lost frame in a series of frames representing an encoded audio signal in a sub-band predictive coding system is provided. In accordance with the technique, one or more received frames in the series of frames are decoded to generate a full-band output audio signal, wherein the full-band output audio signal comprises a combination of at least a first sub-band decoded audio signal and a second sub-band decoded audio signal. The full-band output audio signal corresponding to the one or more received frames is stored. Then, a full-band output audio signal corresponding to the lost frame is synthesized, wherein synthesizing the full-band output audio signal corresponding to the lost frame comprises performing waveform extrapolation based on the stored full-band output audio signal corresponding to the one or more received frames.

The invention relates to a self-adaptive method for fault line selection of a cable-wire mixed line of an electric distribution network by using full-band wavelet energy relative entropy. The method comprises the following steps: when the zero-sequence voltage instantaneous value of a bus is out of limit, starting a fault line selection device immediately; performing wavelet decomposition on zero-sequence current in 1/4 cycle after the fault of each line, performing single reconstruction on wavelet decomposition coefficients under each scale, and calculating the wavelet energy under each band of the zero-sequence current of each line by using reconstruction coefficients; and calculating the wavelet energy relative entropy under each band of each line and solving the comprehensive wavelet energy relative entropy of each line by combining the super-strong recognition capability of the relative entropy to slight differences between signals, and self-adaptively selecting out the fault line by comparing the size of the full band comprehensive wavelet energy relative entropy of each line. Theoretical analyses and a large number of emulations show that the method effectively avoids the influence caused by a CT saturation discontinuous angle on the line selection, and is applicable to the cable-wire mixed lines, pure cable lines and pure aerial lines.

The invention discloses a micropower wireless network ad-hoc networking method based on multi-channel frequency hopping. A coordinator node is used for starting building of a whole sub network, an in-network routing node is controlled to conduct hop-by-hop grouping in a specified period to start broadcast networking of out-network routing nodes in the first hop range, manage complete routes from itself to the routing nodes in the region of the in-network routing node and conduct link maintenance and transparent transmission of application messages. The routing nodes are used for conducting multi-channel passive scanning receiving, automatically select an optimized route by capturing the whole route from a coordinator to the neighborhood nodes in the first hop range and actively report the whole captured route to the coordinator in a communication link active period. The whole networking process is quick, simple, free of manual participation and the like. Meanwhile, the coordinator controls the communication link active period, effectively prevents broadcast storm, prevents the out-network routing nodes from actively starting access applications periodically in full band and can share spectrum resources with other devices in a day parting mode. System expandability and scalability are good.

The invention discloses a multi-channel self-adaptation frequency-hopping processing method suitable for an aeronautical ad-hoc network. The method comprises the steps of (1) evaluating all frequency points; (2) dividing a frequency-hopping full band into m physical channels, and initially allocating n frequency points to each physical channel to form frequency sets; (3) selecting frequency points with the lowest power in other physical channels to replace interfered frequency points in the selected physical channel; (4) dynamically selecting the current idlest physical channel according to the idleness degree of the current physical channels when information to be sent of a node MAC layer is sent; (5) carrying out modulation and frequency-hopping transmission on framed data through the selected physical channels. The invention further discloses a multi-channel self-adaptation frequency-hopping processing system suitable for the aeronautical ad-hoc network. The system comprises a spectrum sensing module, a self-adaptation frequency point allocating module and channel idleness degree statistics module. According to the multi-channel self-adaptation frequency-hopping processing method and system suitable for the aeronautical ad-hoc network, the network reliability is improved through spectrum sensing processing and design of self-adaptation frequency point allocation protocols.

An organic electroluminescent device with the feature of three-wavelength luminescence is provided. The device includes a hole transporting layer, an electron blocking layer, a first host material layer, a second host material layer, a hole blocking layer, and an electron transporting layer placed between an anode and a cathode in turn. In which, the first host material layer has a first guest luminous substance mixed therein for projecting a first color light source (B), while the second host material layer correspondingly has a second guest luminous substance and a third guest luminous substance mixed therein for projecting a second color light source (G) and a third color light source (R), respectively, under the effect of an external bias voltage, wherein said second guest luminous substance or said third guest luminous substance may be a phosphorescence substance. Thus, not only a continuously full-band, full-colored light source featuring three-wavelength may be acquired directly by means of the combination of RGB colors, but also an effective utilization of phosphorescence substance and thus significantly raised luminescence efficiency may be obtained.

The invention discloses a method for coating an infrared stealth coating on an object surface coated with a radar absorbing coating, and belongs to the technical field of a functional material. The method comprises the following concrete processes: 1, preparing each coating carrier of a corresponding infrared stealth coating, a component A of the infrared stealth coating and a component B of the infrared stealth coating; 2, cleaning the object surface coated with the radar absorbing coating; 3, mixing and evenly agitating a to-be-used inner coating carrier with the component A and the component B, and spraying on the surface of the radar absorbing coating by adopting a compressed gas manner, and drying; 4, sequentially taking the to-be-used coating carrier to mix and evenly agitate with the component A and the component B in a manner same as spraying of the inner layer, spraying and drying by adopting the compressed gas manner to the outermost layer. The method has the advantages that the infrared emitting ability can be reduced to below 0.25, meanwhile, the radar absorbing performance of the coating can be significantly improved within the full-band range of 1-18GHz, and excellent infrared/radar and stealth performances are achieved.

Methods and systems for a mixed time-frequency domain compander, where the expander and compressor are applied in the frequency domain (subbands), while the limiter and the linear gain are applied in the time-domain (full band). Far-end noise reduction is achieved by adapting the expander gain to the far-end noise, near-end noise compensation is achieved by adapting the linear gain and the compressor gain to the near-end noise. The range of the linear gain section is set individually for each subband, but the linear gain is essentially applied to the full band signal via a scaling procedure. The scaling procedure first reduces the compander gain in the frequency domain by a scaling factor and then performs the reciprocal reverse scaling in the time domain. Far-end noise reduction is coupled to near-end noise compensation in order to avoid cross-modulation of the far-end noise by the near-end noise.

The invention discloses a light two-component soft thin layer local resonance acoustic material structure. The same kind of light flexible materials provide weight and elasticity, and another kind of light flexible materials provide a two-component soft thin type local resonance unit with local rigidness. The local resonance unit can control transmission of mechanical waves 2-3 magnitude orders larger than structure size, and a wide band gap is achieved. According to the structure, a full band gap can be opened under the low-frequency stage below 500 Hz, a vertical band gap can be formed at the super-low-frequency stage below 100 Hz, and the requirements for low-frequency damping and noise reducing of thin-wall pieces such as a carrying tool can be well met. The designed structure has the advantages of being low in thickness, light in weight, soft, wide in vertical band gap and convenient to machine, material cost is low, the structure can be directly arranged on carrying tools such as a bus and a train conveniently, and an effective solution is provided for low-frequency damping and noise reducing of a practical carrying tool.

The invention discloses a quick network finding method, system and mobile terminal, relating to the field of mobile communication. The method comprises the following steps: a personal computer (PC) with a Windows 8 system generates a network searching instruction for searching for a network in full band or limited band according to a user request, and sending the network searching instruction to a mobile terminal for surfing the Internet; the mobile terminal performs network searching in full band or limited band according to the network searching instruction; in the case of full-band network searching, the mobile terminal performs network searching in all supported bands and sends the network searching results to the PC; and in the case of limited-band network searching, the mobile terminal reads the signed network information in an SIM (subscriber identity module) card and signed with an operator of the SIM card, searches for the corresponding network according to the signed network information and sends the network searching results to the PC. According to the invention, the mobile terminal can quickly find a network and has a strong real-time property.

An uncooled focal plane array (FPA) for imaging at full-band infrared and terahertz regime is provided. The FPA utilizes bimaterial cantilever array as the pixels (101) and are fabricated on a visible light transparent substrate (103). The bimaterail cantilever (101) comprises an absorber (102), two bimaterial legs (202), two thermal isolation legs (203), two anchors (102), and a mirror. The radiation to be detected casts on the front side of bimaterial cantilevers (101), while the transparent substrate (103) is illuminated by visible light to readout the deformation of the bimaterial cantilevers (101) caused by the energy absorption by the absorber (102). The FPA is fabricated by surface sacrificial layer processes, especially by using metamaterial to enhance the function of the absorber and polyimide as the sacrificial layer. The advantages of the uncooled focal plane array include multiband work,high sensitivity and resolution, good reliability and uniformity, low cost and easy fabrication.

A technique is described for concealing the effect of a lost frame in a series of frames representing an encoded audio signal in a sub-band predictive coding system. In accordance with the technique, a first synthesized sub-band audio signal is synthesized, wherein synthesizing the first synthesized sub-band audio signal comprises performing waveform extrapolation based on a stored first sub-band decoded audio signal. A second synthesized sub-band audio signal is also synthesized, wherein synthesizing the second synthesized sub-band audio signal comprises performing waveform extrapolation based on the stored second sub-band decoded audio signal. The first synthesized sub-band audio signal and the second synthesized sub-band audio signal are combined to generate a synthesized full-band output audio signal corresponding to a lost frame.

An apparatus and method for providing a power scanning in a terminal with two or more Radio Frequency (RF) chips are provided. The method includes selecting one RF chip from the two or more RF chips, performing the power scanning on a full band supported by the selected RF chip by using the selected RF chip, gathering a power scanning result obtained by performing the power scanning, and sharing the power scanning result gathered by using the selected RF chip with an unselected RF chip.

The invention relates to a tunable antenna structure for a completely closed metal-frame mobile phone. An LTE main antenna feed point is arranged between a PCB and one side of a metal frame; an LTE diversity antenna feed point is arranged between the PCB and one side opposite to the LTE main antenna feed point; a GPS/WiFi feed point, a first frame ground point and a fourth frame ground point are arranged between the PCB and the other side; the first frame ground point and the fourth frame ground point are located at two sides of the GPS/WiFi feed point; a second frame ground point and a third frame ground point are arranged between the PCB and one side opposite to the GPS/WiFi feed point; a tunable device is arranged on the PCB and is connected with the second frame ground point; an LTE antenna is directly connected with a GPS/WiFi antenna through the feed point and the metal frame for feeding; and the metal frame is grounded through the ground points to form an antenna closed loop and to generate antenna resonance. The tunable device tunes low-frequency bandwidth and meets LTE full-band coverage.

The invention discloses a planar optical waveguide and a manufacturing method thereof. The planar optical waveguide comprises a lower cladding, a waveguide core layer, an isolation layer and an upper cladding; the refractive index of the upper cladding is equal to that of the lower cladding and is higher than that of the isolation layer; the isolation layer is formed on the lower cladding; the waveguide core layer is packaged completely in the isolation layer; the upper cladding is formed on the isolation layer. The refractive index distribution of the planar optical waveguide is optimized, the loss of a device is reduced, and the 1250-1650 full band width performance can be realized more easily.

The embodiment of the invention relates to the field of communication equipment and discloses an antenna system and a terminal. The antenna system comprises a first antenna, a second antenna, a firstfeeding point, a second feeding point and a first grounding point, wherein the first antenna and the second antenna are obtained through cutting a metal border of the terminal from a breaking joint, asecond breaking joint and a third breaking joint; the first antenna is located between the first breaking joint and the second breaking joint and connected with the first feeding point; the second antenna is located between the second breaking joint and the third breaking joint and connected with the second feeding point; the first grounding point is located at the edge position, close to the second breaking joint, of the first antenna; the first breaking joint and the second breaking joint are located on a short-edge side surface of the metal border of the terminal; the third breaking jointis located on a first long-edge side surface of the metal border of the terminal; and the first feeding point and the second feeding point are arranged on a printed circuit board. According to the antenna system, the terminal can work on a full band, the condition that a high frequency and a low frequency can simultaneously exist in different states is met and the requirements of carrier aggregation are met.

The invention discloses a full-band high-precise aspheric surface machining method. The method mainly comprises the following steps: 1) detecting the surface shape of a to-be-machined aspheric surface which is formed by milling and grinding by using an interferometer; 2) according to the error data of the surface shape to be machined, selecting a suitable flexible polishing small tool, and determining machining parameters of a numerical control machine tool by combining a removal function of the small tool; 3) placing an aspheric surface element to be machined on a machining platform of the machine tool, inputting machining parameters, and executing a polishing process by adopting a variable step pitch spiral machining path; 4) after one-period polishing is completed, detecting the surface shape of the aspheric surface element, and repeating the steps 2, 3 and 4 until the precision of the low-frequency surface shape of the aspheric surface reaches a standard according to the feedback situation of the error data of the surface shape; 5) performing PSD (Power Spectral Density) analysis on the surface shape data of the low-frequency surface shape which reaches the standard, selecting a flexible polishing small tool with a large diameter according to medium-high frequency error frequency distribution characteristics determined by a PSD curve, performing fairing process machining on the aspheric surface optical element, and repeating several times until the medium-high frequency error is controlled effectively. According to the full-band high-precise machining method for the aspheric surface optical element, the full-band high-precise machining of the aspheric surface optical element is completed by only using a CCOS (Computer Controlled Optical Surfacing) numerical control small grinding head machine tool.

A radio frequency (RF) receiver utilizing dynamic power management for administration of power consumption. The RF receiver includes an RF antenna, an RF full band filter, an RF amplifier, an RF sub-band filter, a first local oscillator, an RF mixer, a first IF amplifier, an IF wide band filter, a second local oscillator, an IF mixer, two secondary IF amplifiers, an IF narrow band filter, a digital signal processing subsystem, three power sensors, and a control logic subsystem. Based on its location in the system, each power sensor has a unique threshold setting that is set just below a total RF power level where desired signal degradation might occur. The control logic subsystem utilizes outputs of the power sensors to detect a total RF power present due to interfering signals plus a desired signal within an entire bandwidth present at each stage and dynamically manages power by adjusting bias of each stage accordingly via its bias control outputs.

The invention discloses a microwave photon full-band radar detection method. The microwave photon full-band radar detection method comprises the steps that suppression carrier single sideband modulation is carried out on an optical carrier with a frequency of fL by using an intermediate frequency chirp signal to obtain a linear frequency swept first-order sideband optical signal; a single comb signal is selected from optical frequency comb signals with frequency distribution fOC=fL+/-Nfc to combine beams with the linear frequency swept first-order sideband optical signal, wherein N=0, 1, 2, 3... L, and L is a positive integer; the obtained combined beam optical signal is converted into an electrical signal, and the electrical signal is transmitted to a target as a radar detection signal; and the combined beam optical signal is taken as a reference optical signal, a target reflected electrical signal is subjected to optical domain frequency conversion and deskewing processing to obtainan intermediate frequency signal carrying target information, and the target information is extracted from the intermediate frequency signal. The invention further discloses a microwave photon full-band radar. The microwave photon full-band radar detection method and the microwave photon full-band radar can quickly and conveniently adjust the working wave band of the radar and the radar signal parameters in the full wave band range, the structure is simple, and the detection efficiency is high.

The invention discloses a set-top box for supporting multiple television terminals, which comprises a full-band high-frequency head, a demodulator module, a plurality of demultiplexing/multiplexing modules and an audio/video data conversion module. The full-band high-frequency head is used for converting locked antenna radio-frequency signals in a plurality of frequency points into medium-frequency signals and transmitting the medium-frequency signals to the demodulator module, the demodulator module is used for demodulating program transmission streams of a plurality of channels from the medium-frequency signals and respectively transmitting the program transmission streams to the demultiplexing/multiplexing modules, and the demultiplexing/multiplexing modules are used for analyzing audio/video data in the programs of the channels from the program transmission streams according to the program demanded by a user; and the audio/video data conversion module is used for converting the audio/video data in the programs of the channels into signals capable of being identified by television terminals and outputting the signals to the television terminals. The invention also discloses a method for realizing support of a plurality of television terminals through the set-top box. The set-top box can support multiple television terminals so that users can simultaneously watch television programs, the optional programs of each television are not limited to one frequency point, the scope of selection of the television terminals can be broadened, and the user experience can be enhanced.

The invention provides an erasure code optimization method for a distributed storage system. The method utilizes the characteristics of an erasure code to reduce the size of a band of the erasure code. The small strip can meet full band writing and the read and completed data is minimized for an un-full band part. When the data is greater than large IO, the small band can split request data into a plurality of bands, a memory reference technology is utilized to carry out merging of the small bands at a logical layer, so that the large IO can be split and the performance cannot be affected. According to the erasure code optimization method, the band of the erasure code is minimized, so that the data volume for reading the completed data is reduced when the un-full band is written. A front segment can ensure higher read-write performance without setting a buffer pool, so that the data security is greatly increased and the memory consumption of the front segment is reduced.

A satellite transponder test system calibration method includes the steps of (1) establishing full-band phase reference for a receiver of a vector network analyzer (VNA); (2) calibrating a front link of a satellite transponder test system by taking a frequency band included by a satellite transponder under test as the unit; (3) calibrating a rear uplink by taking an uplink beam included by the satellite transponder under test; (4) calibrating a rear downlink by taking a downlink beam included by the satellite transponder under test as the unit; and (5) combining the results in the steps (2) to (4) into complete satellite-ground link calibration data. The method of the invention combines the test system composition principle and the satellite transponder framework and makes full use of the frequency synchronous tuning features and scanning calibration functions of the transmitter-receiver of the VNA to establish a plurality of measuring channels for parallel synchronous frequency scanning calibration, thereby significantly improving the efficiency, precision, implementing convenience and automation degree of the calibration before the test of the communication satellite transponder.