10 results about "Wideband communication systems" patented technology

The present application relates to the technical field of broadband antenna, in particular to a kind of broadband transverse electric and magnetic horn antenna that can be installed on the surface of metal cylinder, it is characterized in that, metal cylindrical carrier, four broadband transverse electric and magnetic horn antennas installed on the surface of metal cylinder, each transverse electric and magnetic horn antenna is mainly composed of radiation structure and ridge, to increase the bandwidth of antenna.Compared with prior art, the bandwidth of antenna is significantly improved by adding ridge structure.Transverse electric and magnetic horn antenna is connected with two nylon isolation columns and metal cylinder through a inverted L type structure.The antenna provided by the present application has the characteristics of wide operating frequency band, good directivity, etc., and is suitable for electromagnetic compatibility test, radar system, field measurement and ultra-wideband communication system.

The invention discloses a multi-dimensional bee colony broadband communication system and method based on space-time, the system comprises a space-time electromagnetic spectrum sensing avoidance suppression module, a self-adaptive channel interference resistance module and an intelligent cooperative channel repair module, the bee colony system designs a communication integrated link, according to different interference sources, the communication integrated link can be matched with the communication integrated link, and the communication integrated link can be matched with the communication integrated link. And the space-time electromagnetic spectrum sensing avoidance suppression module monitors and identifies an interference source environment in a space domain, a time domain and a channel frequency offset, correspondingly extracts interference source characteristics, and cooperatively monitors and adjusts navigation and communication interference at the same time. An interference area, an interference frequency band and an interfered signal segment are determined by analyzing an interference source, a channel navigation integrated link dynamically adjusts a broadband communication modulation coding type and dynamically adjusts a considerable navigation information strategy according to the interfered strength, and meanwhile, an intelligent interference database training model is adopted to identify the interference type, so that the channel navigation integrated link is optimized. An interfered signal is intelligently repaired by adopting a mode of composite synthesis to counteract the interference signal, the channel navigation anti-interference capability of the bee colony unmanned aerial vehicle cluster is improved through a series of measures, and an effective data analysis and performance evaluation basis is provided for a subsequent communication anti-interference experiment of the unmanned aerial vehicle cluster.

The utility model relates to electronic field especially, and it is a kind of filter circuit and filter.The filter circuit includes input port, output port, filter network;Filter network includes first inductance unit, second inductance unit, first capacitor unit, second capacitor unit, third capacitor unit, fourth capacitor unit, first inductive element;The filter network between input port and output port is built by first inductance unit, second inductance unit, first capacitor unit, second capacitor unit, third capacitor unit, fourth capacitor unit, first inductive element, the simple and small design of filter structure is realized, and performance is stable, especially applicable to various small, portable electronic equipment and wideband communication system.

The application discloses a communication method, device, storage medium and equipment, relates to the technical field of communication, and comprises the following steps: when a wideband communication system of a device comprising a wideband communication system and a narrowband communication system meets a predetermined dormancy condition, the wideband communication system is controlled to enter a dormant state; when a narrowband communication system meets a predetermined detection condition, the narrowband communication system is switched to a candidate wideband operating frequency point of the wideband communication system to collect signals and obtain wideband frequency point data; whether there is a wideband network signal on the wideband frequency point data is detected; and if the wideband network signal exists on the wideband frequency point data, the wideband communication system is woken up. The application can make the wideband communication system of a wide-narrow integrated communication device reliably work on demand, and reliably reduce the energy consumption of the wide-narrow integrated communication device.

Systems and methods for encoding and decoding ultra-wide band (UWB) communication signals includes encoding by block interleaving at either bit-level or symbol-level following convolutional encoding, and decoding by block de-interleaving UWB symbols or log-likelihood ratios (LLRs) prior to convolutional decoding. Decoding may further include detecting and nulling (or lowering) outlier UWB symbols or LLRs determined to be affected by interference, prior to block de-interleaving.

A method of operating a communications system includes receiving a signal at a digital predistorter (DPD), introducing predistortion to the signal using the DPD, and converting the predistorted signal to an analog signal using a digital-to-analog converter having a first bandwidth. The method also includes amplifying the analog signal, sampling the amplified signal using an analog-to-digital converter having a second bandwidth less than the first bandwidth, and extracting coefficients of the DPD from the sampled signal.

The described technology is generally directed towards accelerating distributed principal components in the presence of noisy channels. A federated training based method is disclosed. The method can calculate a desired common subspace for edge devices under the coordination of a server. The server can be connected to the edge devices via noisy wireless channels. A broadband communication system can be used, wherein devices can transmit local gradients by linear analog modulation over sub-channels in communication rounds for over-the-air aggregation. Before each communication round, the server can detect information of a current region. Based on the region information, an online region-adaptive power control scheme can be applied to accelerate the process.

The application discloses a sub-millimeter dual-passband filter transmission line based on a rectangular micro coaxial line, which comprises a micro coaxial outer conductor, a support strip, an inner conductor and a transition coaxial transition section arranged in the micro coaxial outer conductor, and adopts a micro coaxial inner and outer structure as a whole. The number, geometric shape and electrical characteristics of the micro coaxial inner conductor are designed and optimized to realize the filter effect of miniaturization and wide bandwidth under the sub-millimeter wave level size, overcome the defects of considering size and performance of the existing filter, and be used as a basic transmission line unit to construct various passive networks or directly feed an antenna to realize the filter characteristics from the transmission line level rather than the network level. The sub-millimeter dual-passband filter transmission line has low insertion loss, good out-of-band suppression characteristics and wide passband, and is particularly suitable for the filter application of low-frequency and millimeter wave high-frequency band signals in a wideband communication system.

The invention discloses a secure transmission method for MMSE (Minimum Mean Square Error) beamforming of a DAM (Digital Administration and Maintenance) system under the assistance of multiple IRS (Inter-Reference Signal), which comprises the following steps of: constructing a broadband communication system assisted by multiple IRS, establishing a channel impulse response model, and obtaining a received signal expression; based on the model, obtaining a channel asymptotic orthogonality conclusion; modulating the transmitted signal through time delay alignment modulation (DAM); based on a channel asymptotic orthogonality conclusion, calculating a secure transmission rate in combination with maximum ratio transmission beamforming and a DAM modulation result; determining an optimal power distribution value under each path; the MMSE beam forming vector and the phase shift matrix based on the path are optimized one by one, and the secure transmission rate between the legal user and the eavesdropper is maximized. According to the design method adopted by the invention, ISI in a multipath channel is eliminated to the greatest extent, the maximum secure transmission rate between a legal user and an eavesdropper is obtained, and a secure and efficient transmission solution is provided for a multi-IRS-assisted DAM system.

The submillimeter-level dual-passband filtering transmission line comprises a micro-coaxial outer conductor, a supporting strip, an inner conductor and a switching coaxial transition section, the supporting strip, the inner conductor and the switching coaxial transition section are arranged in the micro-coaxial outer conductor, and the whole submillimeter-level dual-passband filtering transmission line adopts a micro-coaxial inner and outer structure. By designing and optimizing the number, the geometrical shape and the electrical characteristics of the micro-coaxial inner conductors, the filter effects of miniaturization and wide bandwidth are achieved under the submillimeter wave level size, the defect that an existing filter gives consideration to both the size and the performance is overcome, and the filter can serve as a basic transmission line unit to be used for constructing various passive networks or directly feeding an antenna. And the filtering characteristic is realized from a transmission line level instead of a network level. The submillimeter-level dual-passband filtering transmission line has relatively low insertion loss, good out-of-band rejection characteristic and relatively wide passband, and is particularly suitable for filtering application of low-frequency and millimeter-wave high-frequency band signals in a broadband communication system.