158 results about "Propagation effect" patented technology

A receiver in a wireless communication system comprises a reverse transform configured to produce a vector of baseband signal values, and a projection canceller configured to project the vector of baseband signal values onto at least one subspace that is substantially orthogonal to an interference subspace. The reverse transform may be adjoint to a forward transform employed by at least one transmitter in the wireless communication system. The combination of interference cancellation with one or more receiver operations may be a substantially adjoint operation relative to one or more transmitter operators and channel-propagation effects. The reverse transform may include a Fourier transform, a wavelet transform, or any other well known invertible transforms. Reverse transforms may include spread-spectrum multiple-access coding and may be implemented in systems configured to perform single-input, multiple output or multiple-input, multiple-output operations. Interference components may be selected in a projection canceller relative to predetermined ratios of interference in the received signal.

Replica correlation processing, and associated representative signal-data reduction and reconstruction techniques, are used to detect signals of interest and obtain robust measures of received-signal parameters, such as time differences of signal arrival and directional angles of arrival, that can be used to estimate the location of a cellularized-communications signal source. The new use in the present invention of signal-correlation processing for locating communications transmitters. This enables accurate and efficient extraction of parameters for a particular signal even in a frequency band that contains multiple received transmissions, such as occurs with code-division-multiple-access (CDMA) communications. Correlation processing as disclosed herein further enables extended processing integration times to facilitate the effective detection of desired communications-signal effects and replication measurement of their location-related parameters, even for the communications signals modulated to convey voice conversations or those weakened through propagation effects. Using prior, constructed, signal replicas in the correlation processing enables elimination of the inter-site communications of the signal representations that support the correlation analyses. Reduced-data representations of the modulated signals for voiced conversation, or for the variable components of data communications, are used to significantly reduce the inter-site communications that support the correlation analyses.

A method of processing a signal includes taking a signal recorded by a plurality of signal recorders, applying at least one super-resolution technique to the signal to produce an oscillator peak representation of the signal comprising a plurality of frequency components for a plurality of oscillator peaks, computing at least one Cross Channel Complex Spectral Phase Evolution (XCSPE) attribute for the signal to produce a measure of a spatial evolution of the plurality of oscillator peaks between the signal, identifying a known predicted XCSPE curve (PXC) trace corresponding to the frequency components and at least one XCSPE attribute of the plurality of oscillator peaks and utilizing the identified PXC trace to determine a spatial attribute corresponding to an origin of the signal.

Replica correlation processing, and associated representative signal-data reduction and reconstruction techniques, are used to detect signals of interest and obtain robust measures of received-signal parameters, such as time differences of signal arrival and directional angles of arrival, that can be used to estimate the location of a cellularized-communications signal source. The new use in the present invention of signal-correlation processing for locating communications transmitters. This enables accurate and efficient extraction of parameters for a particular signal even in a frequency band that contains multiple received transmissions, such as occurs with code-division-multiple-access (CDMA) communications. Correlation processing as disclosed herein further enables extended processing integration times to facilitate the effective detection of desired communications-signal effects and replication measurement of their location-related parameters, even for the communications signals modulated to convey voice conversations or those weakened through propagation effects. Using prior, constructed, signal replicas in the correlation processing enables elimination of the inter-site communications of the signal representations that support the correlation analyses. Reduced-data representations of the modulated signals for voiced conversation, or for the variable components of data communications, are used to significantly reduce the inter-site communications that support the correlation analyses.

A method of transmitting information over a non-linear optical channel includes the step (152) of generating an information-bearing signal, preferably an OFDM signal, which includes a plurality of closely-spaced sub-carriers in the frequency domain. A time-varying phase modulation is determined (154), which is a first function, and preferably a linear function, of the transmitted optical power corresponding with the information-bearing signal. The information-bearing signal and the time-varying phase modulation are applied (156) to an optical source in order to generate a corresponding transmitted optical signal having substantially the stated transmitted optical power characteristic. The first function of transmitted optical power is selected so as to mitigate the effect of the non-linearity of the optical channel upon the transmitted optical signal. In alternative arrangements, a time-varying phase modulation, being a second function of optical power, is computed (162) and applied (164) to a signal received following transmission through a non-linear optical channel. The two alternative arrangements provide, respectively, for pre-compensation and post-compensation of non-linear propagation effects that may be carried out entirely within the electrical domain, for example using digital signal processing techniques.

The invention discloses a method and a system for playing a video advertisement. The method comprises the following steps of after a trigger signal for playing a video advertisement is received, playing the video advertisement; when the video advertisement is played, pushing an interaction problem to an user; receiving the reply of the user on the interaction problem; judging if the reply meets the requirement or not; if the reply meets the requirement, stopping the playing of the video advertisement. The method and the system have the advantages that in the advertisement playing process, the interaction with the user is increased, the user is promoted to actively know brands, products and other information, and the advertisement propagation effect is improved; if the user has known the advertisement, the advertisement can be skipped, so the time of the user is greatly saved, and the experience of the user is improved.

The invention discloses a short-spike and root-grafting rapid propagation method for camellia azalea. The short-spike and root-grafting rapid propagation method comprises the following steps: selecting general camellia oleifera seeds, sterilizing the general camellia oleifera seeds with potassium permanganate solution and then carrying out stratification, sprouting and anvil culture; after radicles are 3-4 cm in length, grafting the radicles; selecting one-year branches with strongly-grown crown peripheries, full sprout eyes, no pest and disease damage and half lignification to lignification as scions with the length of 2-3 cm; soaking base parts with a plant growth regulator solution; after the scions are grafted, planting the grafted scions in a container bag filled with nutrient-rich substrate on a seed bed in a sunshelter for culturing; and covering, humidifying, shielding and carrying out standard management to form a high-quality grafted container seedling of the camellia azalea. According to the short-spike and root-grafting rapid propagation method, the grafting is realized at the smooth parts of radicles and the root systems of plants are developed, so that the survival rate and the growth amount of nursery stock can be effectively increased and the culture time of the stock is greatly shortened; and the scions are short, and thus the utilization rate and the propagation coefficient of the scions are improved. The short-spike and root-grafting rapid propagation method has the advantages of convenience for operation, high work efficiency and better economic benefit and social benefit; and according to the method, the scale propagation effect of the camellia azalea stock is ensured.

The invention relates to an interactive internet advertisement putting method and system. Interactive activities are loaded to advertisements pushed by a media platform, and users obtain bonuses corresponding to the current interactive activity after accomplishing the interactive activity, wherein the interactive activities include interactive games, interactive questions and answers or real-time lotteries. By adopting the method and the system, users have the opportunity to obtain multiple bonuses provided by advertisers by browsing advertisements and freely participating in interactive activities, such as cash bonus, gifts, vouchers, free tickets, or integrals of the media platform and the like; users participating in interesting interaction can be changed from passive to active and gain benefits, and the interest of browsing advertisements can be aroused. As for advertisers, when interesting interaction is set in advertisements, the attraction is enhanced, users can positively concern advertisement contents, and multiple propagation effects of advertisement putting can be achieved.

A method of transmitting information over a non-linear optical channel includes the step (152) of generating an information-bearing signal, preferably an OFDM signal, which includes a plurality of closely-spaced sub-carriers in the frequency domain. A time-varying phase modulation is determined (154), which is a first function, and preferably a linear function, of the transmitted optical power corresponding with the information-bearing signal. The information-bearing signal and the time-varying phase modulation are applied (156) to an optical source in order to generate a corresponding transmitted optical signal having substantially the stated transmitted optical power characteristic. The first function of transmitted optical power is selected so as to mitigate the effect of the non-linearity of the optical channel upon the transmitted optical signal. In alternative arrangements, a time-varying phase modulation, being a second function of optical power, is computed (162) and applied (164) to a signal received following transmission through a non-linear optical channel. The two alternative arrangements provide, respectively, for pre-compensation and post-compensation of non-linear propagation effects that may be carried out entirely within the electrical domain, for example using digital signal processing techniques.

A method and apparatus for implementing wireless internet connections for a plurality of portable computing devices located within a given area or hotspot. The invention employs a combination of wired and wireless links to manage propagation effects of the transmitted signal and to reduce interference with signals transmitted in adjacent spaces. In accordance with one aspect of the invention, the existing wiring infrastructure at the hotspot, which may be coaxial cable for CATV, is used as the wired segment. A broadband signal, containing internet data obtained from a central computer, is transmitted from a plurality of access points. The signals transmitted from the access points are injected onto the existing wiring, with the broadband signal isolated from the data or power signals carried by the wiring infrastructure. At the outlet ends of the coaxial cable, the broadband signals are separated from the existing data or power signals and coupled to high efficiency antennas which radiate a signal throughout the corresponding living or activity space. In the case of a hotel room, for example, the signal is broadcast for reception anywhere within the hotel room. In accordance with one aspect of the method of the invention, the broadband signals are broadcast from the various access points using several carrier frequencies or channels, and distribution of the channels is arranged to avoid adjacent room same channel interference.

The invention relates to an online advertisement push method based on user behavior data and potential user influence analysis and a push evaluation method thereof. Compared with methods in the prior art, a defect that potential user influence cannot be dug out can be solved. The online advertisement push method based on the user behavior data and potential user influence analysis and the push evaluation method thereof comprise the following steps that feature extraction of media information and user information is performed; modeling is performed on the basis of network propagation influence; potential influence people are marked out; and push effect evaluation is performed. The user and media information can be considered in prediction of media propagation range, and the propagation effect of the media information among users can also be considered so that real influence of the media information in the network can be more accurately analyzed and predicted.

Methods and apparatus for generating a private-public key pair, for encrypting a message for transmission through an unsecure communication medium (30), and for decrypting the message are disclosed. The methods are based on the well-known McEliece cryptosystem or on its Niederreiter variant. More general transformation matrices Q are used in place of permutation matrices, possibly together with an appropriate selection of the intentional error vectors. The transformation matrices Q are non-singular n×n matrices having the form Q=R+T, where the matrix R is a rank-z matrix and the matrix T is some other matrix rendering Q non-singular. The new Q matrices, though at least potentially being dense, have a limited propagation effect on the intentional error vectors for the authorized receiver. The use of this kind of matrices allows to better disguise the private key into the public one, without yielding any further error propagation effect. Based on this family of Q matrices, the presently proposed cryptosystem enables the use of different families of codes than Goppa codes, such as RS codes, by ensuring increased public key security.

The invention discloses a voice frequency directional processing method and a voice frequency directional processing device. The voice frequency directional processing method comprises the steps of receiving typed-in user quantity and user position information; using a stereophonic sound modulating mode to modulate each route of voice frequency signal to an ultrasonic signal pointing to the same user when the user quantity is one; using a single track modulating mode to modulate the i route voice frequency signal to an ultrasonic signal pointing to the i user when the user quantity is larger than one and smaller than or equal to the number of ultrasonic transducers; using a surround modulating mode to modulate each route of voice frequency signal to an ultrasonic signal pointing to sound wave reflecting faces above the user and / or on two sides of the user when the user quantity is larger than the number of the ultrasonic transducers; and outputting each route of ultrasonic signal to a corresponding ultrasonic transducer. The non-linear propagation effect of ultrasonic waves in the air is used, and according to the actual quantity and the specific position information of the users, different voice frequency playing effects are decided, and the high directivity of audible voice frequencies is effectively improved.

The invention aims at the characteristics of randomness and suddenness of power grid equipment faults. Therefore, the problem is difficult to accurately predict; the invention provides a method for enhancing operation and maintenance management and control of distribution network equipment. The invention belongs to the technical field of power grid equipment operation. Big data technologies such as clustering analysis, machine learning and the like are applied to effectively integrate and mine system data such as an electricity consumption information acquisition system, PMS2.0, D5000 and thelike; data islands among the systems are broken through, an equipment fault prediction model is established according to an adjacent propagation effect analysis theory, the equipment fault occurrenceprobability can be pre-judged in advance, equipment maintenance can be arranged in advance, the power failure frequency and time are reduced, the power supply quality is improved, and the operation and maintenance level of a distribution network is greatly improved. According to the method, an alarm signal is sent out before an equipment fault occurs, the equipment fault is pre-judged in advance,a coping strategy is provided, the big data technology is innovatively applied to predict the possibility that the equipment has faults in future according to historical fault records, and a passive repair working mode is changed into an active repair working mode.

The invention provides a message propagation path extraction method and system. The method comprises the first step of obtaining propagation data and conducting statistics on hierarchies of the propagation data except original propagation nodes, the second step of analyzing the propagation nodes in the propagation data, wherein the analyzing process includes the steps of conducting analysis to obtain the hierarchy which the single propagation node belongs to and the propagation node of the previous hierarchy connected with the single propagation node, marking the propagation frequency of the single propagation node in the hierarchy where the single propagation node is located and adding one to the propagation frequency, marking the propagation frequency of the propagation node, connected with the single propagation node, of the previous hierarchy, adding one to the propagation frequency and marking the analyzed propagation nodes, the third step of conducting statistics on all the hierarchies and the propagation frequencies of all the propagation nodes in all the hierarchies, the fourth step of conducting statistics on the number of all the propagation nodes except the original propagation nodes to obtain the total propagation frequency of the original propagation nodes, and the fifth step of constructing a message path tree structure and extracting required propagation nodes. By the adoption of the message propagation path extraction method and system, the message propagation nodes and message propagation paths are analyzed and then integrated to obtain a path structure chart, the key propagation nodes are obtained, and the propagation effect is achieved.

One or more atmospheric propagation effects are estimated by using a phase comparison between and upper sideband and a lower sideband of a modulated signal. In one embodiment, one or more propagation effects are estimated by using a phase comparison between an upper sideband and a lower sideband of a satellite navigation signal. In one embodiment, one or more ionospheric propagation effects are estimated by using a phase comparison between an upper sideband and a lower sideband of a GPS M-code signal.

A network element (5) for use in a wavelength division multiplex (WDM) optical transmission system (1). The WDM optical transmission system (1) comprises at least one demultiplexing means (5c) adapted to demultiplex a received WDM signal into constituent wavelength channels carrying tributary signals with at least a first and at least a second data rate (DR1, DR2). The optical transmission system (1) further comprises at least one first dispersion compensating module (5e) connected with the demultiplexing means for receiving constituent wavelength channels carrying tributary signals having said first data rate (DR1). Furthermore, the optical transmission system comprises at least one bypass bypassing the first dispersion compensating module and connected with the demultiplexing means for receiving constituent wavelength channels carrying tributary signals having said second data rate (DR2). In this way, dispersion compensation of said first data rate constituent wavelength channels can be significantly improved while avoiding detrimental effects on said second data rate constituent wavelength channels.

The invention relates to a multiple-water-layer propagation fish shelter which is characterized by comprising a first suspension fish shelter, a second suspension fish shelter and a location anchor, wherein the suspension fish shelter is connected with the second suspension fish shelter via a rope; the second suspension fish shelter is connected with the location anchor via a rope; the first suspension fish shelter comprises a cover plate and a base which define a hollow cavity body; an inflation device is arranged on the cover plate; the inflation device located in the cavity body is connected with an air bag device; the second suspension fish shelter is a ball casing which is in a hollow structure; a plurality of irregular holes are formed in the surface of the ball casing; an anchor body of the location anchor is internally provided with a plurality of accommodation cavities; the accommodation cavities are internally provided with barbs; the barbs are rotationally connected with convex blocks on the anchor body via pin shafts; limiting blocks are arranged outside the accommodation cavities; a conical cavity is arranged below the anchor body; and an eccentric block is arranged in the conical cavity. The shelter can regulate suspension depth for manual propagation, has good stability, low dragging possibility and excellent ecological performance, can carry out multiple-water-layer propagation and has a good propagation effect.

The invention relates to a transmission method of non-codebook pre-coding in a long term evolution-advanced (LTE-A) system, which belongs to the field of wireless mobile communications. The method comprises the following steps that: a terminal utilizes the obtained channel information to perform geometric mean decomposition to obtain a pre-coding matrix and complete the pre-coding of sent signals; in a base station, a unitary matrix Q and an upper triangular matrix R can be obtained by calculation and then a quick response (QR) decomposition based particle in cell (PIC) algorithm is adopted to perform the multi-input and multi-output (MIMO) detection and decoding of received signals, and then channel sub-space tracking technology is used, and the signals are pre-coded by the unitary matrix Q and then are sent to the terminal; and at the terminal, a unitary matrix P can be obtained by calculation in the same method, and the received signals are detected by the unitary matrix P and simultaneously are pre-coded. In the method, the algorithm has low complexity, and the feedback codebook sequence number occupies less channel resources, so that the channel utilization can be improved, the interference of the front layer sub-channel to a certain sub-channel signal can be eliminated without amplifying noise, and further, the error propagation effect is effectively reduced.

One or more atmospheric propagation effects are estimated by using a phase comparison between and upper sideband and a lower sideband of a modulated signal. In one embodiment, one or more propagation effects are estimated by using a phase comparison between an upper sideband and a lower sideband of a satellite navigation signal. In one embodiment, one or more ionospheric propagation effects are estimated by using a phase comparison between an upper sideband and a lower sideband of a GPS M-code signal.

The invention relates to a method for rapid propagating tissue of cornus alba, which is realized by the steps of explant selecting, cleaning, primary culturing, sub-culturing and rooting culturing, wherein a special culture medium is selected for the primary culturing, the sub-culturing and the rooting culturing, so that the purposes of high the propagation coefficient and good the propagation effect are achieved.

A wireless communication system experience interference from other wireless communication networks. A method for designing wireless communication systems subject to interference is proposed based on a realistic interference model which accounts for the propagation effects introduced by the wireless environment (such as path loss, shadowing, and multipath fading), and for the spatial scattering of transmitters (using a Poisson field). The method accounts for tradeoffs between network parameters, such as signal-to-noise ratio (SNR), interference-to-noise ratio (INR), path loss exponent, spatial density of the interferers, and error probability. Advantages of this method include: 1) a unified framework for designing a wireless system, subject to cumulative interference and noise, incorporating a wide range of performance metrics; and 2) a general application that covers a broad class of wireless communication systems and channel fading distributions.

A seaweed propagation and releasing device includes a base, a main cable, seedling ropes, and a floater; one end of the main cable is fixedly connected to the base, and the other end of the main cableis fixedly connected to the floater; central sections of the seedling ropes are fixedly connected to one section away from the base, of the main cable; the number of the seedling ropes is at least two; and there is no interval between every two adjacent seedling ropes. A seaweed propagation and releasing method is provided. According to the seaweed propagation and releasing device and the seaweedpropagation and releasing method, observation, sampling and supplement and putting of seaweed seedlings can be performed without divers, and the propagation and releasing efficiency can be improved.Compared with the conventional propagation manners for fixing seaweed seedlings on surfaces of reefs, the seaweed propagation and releasing device can fix more Sargassum horueri seedlings, can ensurerapid growth of the Sargassum horueri in a suitable water layer, is significant in propagation effect, can prevent demersal herbivore from ingesting the seaweed; except for the seedling ropes for fixing the Sargassum horueri, the rest devices can be reused all the time, and the sustainability of propagation and releasing can be ensured.

The invention relates to forest tissue culture, and specifically relates to a medium for rapid breeding and propagation of fraxinus americana tissue culture and application thereof. The medium employs an MS or a WPM medium as a minimal medium, and the medium is added with growth augmentors to a final concentration of: CPPU 0.05-0.5mg / L, NAA or IBA 0.1-0.5mg / L, and white granulated sugar 20-40g / L, and a pH of the medium is adjusted to 5.8-5.9. In the invention, plant-growth regulators of CPPU and NAA or IBA are added to the two phase solidified MS or WPM medium, so that the propagation effect on fraxinus americana embryo inducing aseptic seedling stems is substantial. The invention also provides application of the medium in rapid breeding and propagation of fraxinus americana tissue culture, so as to provide a feasible scheme for factory production of fraxinus americana in the future.

The invention discloses a tissue culture fast propagation method for dendrobium candidum. The method is realized by the steps of: explant establishment; explant treatment; primary culture; secondary culture; rooting culture; hardening-seedling; transplanting and the like. Components of a special culture medium are selected for primary culture, secondary culture and rooting culture. The transplanted dendrobium candidum is fast to grow and high in survival rate by virtue of a reasonable hardening-seedling measure, so that purposes of a high propagation coefficient and a good propagation effect are achieved. Moreover, the method disclosed by the invention is low in production cost, and inheritable characters of the obtained tissue culture seedlings are consistent. The method is an effective path for tissue culture fast propagation of dendrobium candidum and is wide in application range.

The invention discloses a multi-image joint registration method based on least square estimation. The method solves the problem of improving multi-image registration precision in signal processing ofPS-InSAR and the like, and includes the realization steps of: using Delaunay triangulation to connect all SAR images in an image set, and optimizing the Delaunay triangulation; using an InSAR registration method to estimate registration offsets of already connected SAR image pairs; selecting a reference image in the image set, and selecting certain uniformly-distributed control points on the reference image; using a least square method to estimate registration offsets of all auxiliary images relative to the reference image at each control point; constructing deviation functions of all the auxiliary-image registration offsets, and estimating registration offsets of all the auxiliary images relative to the reference image; and carrying out re-sampling on all the auxiliary images by the offsets to complete multi-image joint registration. The method significantly mitigates time and space decoherence and error propagation effect impacts, improves multi-image joint registration precision, ishigher in a region coincidence degree of the reference image and the auxiliary images at the same pixel, and can be used for signal processing of the PS-InSAR and the like.

The invention relates to a method and a device for network advertising in a network application system comprising a user scoring system. The invention aims at providing the method and the device for the network advertising, which can attract users to actively click advertisement links, effectively improve the pertinency of advertising users, avoid clicking invalid and other links, reduce pressure borne by a server and a network in the advertising process, and improve the advertising propagation effect.

The invention discloses a beacon technology-based information pushing method and device, and a storage medium. The beacon technology-based information pushing method comprises the steps that a beacondevice searches a terminal device in a preset range so as to acquire a receiving signal strength of the terminal device; determines a current distance between the beacon device and the terminal deviceaccording to the receiving signal strength; and acquires to-be-pushed commodity information stored in local when the current distance is not beyond a preset distance, and sends the to-be-pushed commodity information to the terminal device. The to-be-pushed commodity information is pushed to customers automatically, so that labor cost is saved, and the commodity propagation effect is achieved.

The invention provides a topic release method and a topic reading method, and belongs to the technical field of information. The release method comprises the steps of S1: receiving a topic editing request and then entering a topic editing window containing a plurality of editing options for a user to add; S2: according to selection operations of the user on the editing options, switching the topic editing window to corresponding option editing regions; and S3: editing to-be-edited objects according to editing operations of the user in the option editing regions, after information of finishing editing processing of the to-be-edited objects by the user is received, returning to the topic editing window, and after a release instruction of the user is received, sending a topic carrying user account information to a server for requesting release. The release method and the reading method have the advantages that a plurality of modules can be added in topic contents, and different identities can be adopted for releasing the topic, so that content expression means are enriched and content propagation effects are improved.

In one aspect, the method of synchronising a communications device in a wireless communications network comprises receiving a beacon signal at a first frequency; and receiving a data signal at a second frequency, the beacon signal being used to synchronise reception of the data signal. In another aspect, the method comprises transmitting a beacon signal at a first frequency and transmitting a data signal at a second frequency, the beacon signal being useable to synchronise reception of the data signal. The first frequency is substantially less than the second frequency such that the beacon signal experiences substantially different frequency-dependent propagation effects to the data signal.