58 results about "Spectrum pooling" patented technology

The invention discloses a method of deep neural network based on a discriminable region for dish image classification. The method relates to the field of image processing, integrates a significant spectrum pooling operation, and fuses low-level features and high-level features in a network. The method adopts a convolution kernel filling operation, effectively preserves important information on characteristic spectra, and is matched with data dimensions of a full connection layer, so that the full connection layer can utilize a VGG-16 pre-training model at a training state, thereby improving the training efficiency and network convergence speed. Each image to be classified is subjected to normalization processing based on the model which is learned in a constructed database, the image is tested by using a trained convolutional neural network, the classification precision is measured by using Softmax loss, a classification result of the image is obtained, real categories and predicted categories of targets in all test images are compared, and a classification accuracy rate is obtained through calculation. The method is used for testing on a self-established data set CFOOD90, and theeffectiveness and the real-time performance of the method are verified.

The invention discloses a method for achieving dynamic spectrum allocation in cognitive radio. According to the method, through an idle spectrum fragment detection technology in cognitive radio, idle fragments, occupied by unauthorized users, on a frequency spectrum segment are detected, discrete idle frequency spectrum fragments are aggregated to form discrete sub-channels in an NC-OFDM system, the NC-OFDM sub-channels are placed into a frequency spectrum pool to form resources, and when users need frequency spectrum, the channel resources in the frequency spectrum pool are distributed to the users who wait for access so that data transmission can be carried out, and the utilization rate of the frequency spectrum is increased. According to the method for achieving dynamic spectrum allocation in cognitive radio, the detected discrete idle frequency spectrum fragments are placed into the frequency spectrum pool to be aggregated, and are distributed through the frequency spectrum pool system. According to the method for achieving dynamic spectrum allocation in cognitive radio, the purposes that the utilization rate of the frequency spectrum is increased, the access time of the cognitive users is shortened, and the frequency of frequency spectrum switching, caused by appearance of the authorized users, of the cognitive users is reduced are achieved.

The invention discloses a spectrum sharing method based on user fairness among different operators. The method comprises the following steps: determining a bandwidth value of a shared spectrum pool and update time for reallocating spectrum pool resources by different operators in a negotiating way; determining bandwidth demand values in cells inside the operators according to user types and service types within the current update time, wherein the bandwidth demand values comprise a bandwidth demand preset value determined according to user demand bandwidth resources and bandwidth demand meeting values of user type and service type bandwidth resources meeting a certainty degree; and allocating bandwidths in the shared spectrum pool according to the bandwidth demand values of the operators. Through adoption of the spectrum sharing method, the priorities of different user types and the priorities of different service types are considered fully; shared spectrum resources are allocated based on the user type and service type bandwidth resources meeting the certainty degree; and the resource allocation fairness is improved.

The invention relates to an in-situ dual infrared spectrum pool, which comprises a pool body, wherein a cover is respectively arranged on two ports of the pool body; each cover and the port are sealed by a seal ring; an infrared window is arranged on each cover; the lateral wall of the pool body is provided with two holes; a heating tape is coiled on the outer wall of the pool body; a cooling water system is respectively arranged on outer walls of two ends of the pool body; a sample bracket is fixed in the pool body; two sample cells are arranged on the sample bracket; and a thermocouple passes through the wall of the pool body and is in contact with the sample bracket. The in-situ dual infrared spectrum pool disclosed by the invention is suitable for monitoring adsorption of gases at high temperature and different pressures on the surface of a solid material, or reaction or phase change of the solid material per se.

Disclosed are an inter-network shared frequency spectrum optimization system and method. In the optimization method, a frequency spectrum resource allocated to a first network in a shared frequency spectrum pool comprises a frequency spectrum resource occupied by an OPEN mode base station in a first cell cluster, and a frequency spectrum resource allocated to a second network in the shared frequency spectrum pool comprises a frequency spectrum resource occupied by an OPEN mode base station in a second cell cluster, wherein the frequency spectrum resource occupied by each OPEN mode base station in the first cell cluster and the frequency spectrum resource occupied by each OPEN mode base station in the second cell cluster have the same size. The present invention improves the frequency spectrum efficiency and the base station service quality are improved.

The invention discloses a bidding optimization method of frequency spectrum auction of fractional order frequency reuse. The method comprises the following steps that 1) a frequency spectrum auction model of fractional order frequency reuse is established, a seller submits information of to-be-rent frequency range of himself/herself to an auction intermediary, and the auction intermediary gathers and arranges frequency spectrum resources to be auctioned and then put the resources in a frequency spectrum pool so that buyers with frequency spectrum demands can bid for the frequency spectrum resources; S2) a target function in which income of a main client is maximized is established, an interference price factor is optimized, and optimization is broadcast to secondary users in auction; S3) precoding and power distribution design are carried out in a combined manner by utilizing the optimized interference cost factor omegak* in a scene of fractional order frequency reuse , and the secondary users are divided into cell center secondary users and cell edge secondary uses, and analysis is carried out on the cell center secondary users and the cell edge secondary uses; and S4) bidding of the secondary users in auction is optimized. According to the method, the method is easy to realize and convenient to expand and approaches practical applications more, and a frequency spectrum auction manner has high distribution efficiency and better interference inhibition effect.

The present invention provides an idle spectrum resource management method and a device, wherein idle spectrum resources that are not used by a first system are collected. The idle spectrum resources are composed of licensed spectrum resources and licensed-free spectrum resources. The method comprises the steps of receiving an idle spectrum request from a second system in a preset scenario; and selecting appropriate idle spectrum resources in a spectrum pool for the usage of the second system according to the demand parameters of the idle spectrum request. According to the technical scheme of the invention, the interaction process of the attempt to access idle spectrums is simplified, and the application range is wide. Meanwhile, the signaling overhead is reduced and the time delay is saved. The method and the device are especially suitable for processing bursty data streams, and improve the usage efficiency of idle spectrums.

The invention relates to an in-situ infrared spectrum pool for researching a gas-solid interface or a liquid-solid interface. The in-situ infrared spectrum pool comprises a pool body, wherein a gas or liquid inlet/outlet is formed at the upper end of the pool body; a thermoelectric coupler is inserted into the pool body from the upper end of the pool body; an opening is formed at the lower end of the pool body, and the pool body is connected with a base; an infrared crystal is arranged at a joint of the inner part of the base and the pool body; a sealing ring is arranged between the pool body and the infrared crystal; and a light inlet and a light outlet are formed on the base. By adoption of the in-situ infrared spectrum pool, the absorption, desorption and reaction of molecules of gas or liquid on the surface of a solid material can be researched in situ.

The invention discloses a cognitive radio cooperative spectrum perception experiment platform which comprises an energy detection node, a matching filter perception node, a central node, a gateway interface and a gateway interface and a spectrum pool. The energy detection node, the matching filter perception node, the central node and a cognitive user form a wireless communication network for information interaction. The invention also discloses a cooperative perception method which is applied to the cognitive radio cooperative spectrum perception experiment platform, and the method comprises the following steps that: the energy detection node and the matching filter perception node respectively carry out spectrum perception and send the judgment information to the spectrum pool; the spectrum pool fuses the data of the judgment information, and a conflict channel set and a candidate channel set are obtained; and the central node distributes channels according to the queue of the candidate channel set and the cognitive user, and the gateway interface informs the cognitive user of the distribution result. According to the invention, the respective advantages of energy detection and matching filter detection are fully utilized, the performance of a cognitive network is improved, and simultaneously, the complicacy of data fusion is reduced.

The invention discloses an in-situ Raman spectrum pool and an electrochemical in-situ spectrum testing method. The spectrum pool comprises an upper pole plate made of a conductive material and a basemade of an insulating material, wherein the upper pole plate and the base are overlapped up and down and are tightly matched and connected together through screws and bolts; an opening is formed in the center of the upper pole plate, a window piece made of a transparent material is arranged at the bottom of the opening, and the window piece seals the bottom of the opening; an electrode groove is formed in the center of the upper end face of the base, a spring groove is formed in the bottom of the electrode groove, a conductive spring is arranged in the spring groove, a spring sleeve is arranged at the bottom of the electrode groove and abuts against the upper portion of the conductive spring, and a battery assembly can be placed in the electrode groove and located above the spring sleeve;a conductive screw is arranged on the side edge of the base, one end of the conductive screw extends out of the base, and the other end of the conductive screw is in contact with the electrode groovein the base; and the conductive screw, the conductive spring, the battery assembly and the upper pole plate form a conductive path. The device is high in spectrogram quality and good in sealing performance.

The invention provides a frequency spectrum pricing method based on user preference features in a cognitive radio network. Frequency spectrum pricing is carried out based on a Hotelling game model according to the quality of idle frequency spectrums, a frequency spectrum pricing system model is established at first, the idle frequency spectrums with different quality form a frequency spectrum pool and are divided into aequilate channels to be uniformly sold, and a cognitive user selects an appropriate channel in the frequency spectrum pool according to the demand per se and the frequency spectrum use preferences for purchase and use. The preference demand of the cognitive user is mainly affected by the quality of the frequency spectrums and the market forecast, and the quality of the frequency spectrums is mainly determined by the suffered interference. In the process, a dynamic game process is formed between a main system and a secondary user. Modeling analysis is carried out on the dynamic game process through the Hotelling model, and a reasonable frequency spectrum pricing result is obtained.

The invention relates to a virtual mapping method based on a simulated annealing algorithm under a super-intensive environment. The method comprises the following steps: firstly, initializing a super-intensive network system, and establishing a micro-base station set B and a location set Ab; secondly, establishing a service arrival model through service arrival process and service duration, constructing a channel distribution matrix according to the service arrival model, and computing a signal-to-interference ratio of each user through the channel distribution matrix and an interference model, and then acquiring the network throughput capacity of each user; and virtualizing wireless resources of a macro base station and micro base stations to form a wireless spectrum pool; and finally, distributing spectrum slices to various micro base stations according to a user request, thereby serving for the user. The virtual mapping method disclosed by the invention has the advantage that the spectrum resource is virtualized, the maximum network throughput capacity is satisfied through the optimization algorithm, and the dynamic optimal wireless frequency resource configuration is realized.

The invention discloses a cognitive radio interference suppression method based on a genetic algorithm and mainly solves the problem that the cognitive user data transmission quality cannot be ensured through utilization of an existing cognitive radio spectrum pool multi-user interference suppression method. The method comprises the steps of setting a cognitive user data transmission rate threshold R<thr>; calculating a shielding carrier sequence length L according to the threshold; randomly selecting a set B of L carriers from cognitive user subcarriers as a primary election sequence, wherein the i is equal to 1, 2, ......, L; selecting an optimum intermediate carrier sequence through a fitness function; generating a new carrier sequence through crossover mutation, continuously adjusting the fitness function and generating a new intermediate carrier sequence until the fitness reaches a set threshold and the iteration process of the genetic algorithm is converged, obtaining the optimum interference subcarrier sequence, and shielding the optimum interference subcarrier sequence, thereby realizing the cognitive radio interference suppression.