15 results about "Low data rate" patented technology

The application provides a method for trajectory midcourse target recognition based on a low-data-rate HRRP sequence, and relates to the technical field of radar signal processing.The method obtains target signals through steps one and two, and inputs the HRRP sequence obtained by observing the target through a radar sensor as sample data; the method extracts features of the target through steps three and four: the method establishes a precession model by taking a cone-cylinder target as an example, uses the periodicity of scattering center points in the HRRP sequence to perform time-frequency analysis, and realizes one-dimensional feature distribution of energy strength by using a projection method, so as to extract a precession frequency; and the method extracts target structure features, entropy value features and period features; the method performs signal feature fusion processing through step five, classifies the features by performing feature importance analysis and using a Random Forest algorithm, obtains the category of a target to be recognized, and outputs a final fusion result.

Methods, devices, and system for Enhanced Wideband HF data transmission with adaptive interference avoidance and other improvements. Several embodiments describe a mesh network comprising a plurality of transmitting and receiving nodes in a congested band. The network senses the interference spectrum occupancies at a plurality of receiver nodes and synthesizes transmit waveforms at the transmit nodes so that the spectra of the transmit signals fit into the gaps of the interference spectra at the receiver nodes. The waveform is based on FDM, including OFDM, with adaptive tone suppression at the transmitter. The spectrum occupancy information at each node is continually shared in the background among all nodes using a low data rate, Fountain code with erasure sensing at the receivers, which guarantees robust delivery.

Fire alarm device (1) with at least one fire alarm arrangement (2), wherein the at least one fire alarm arrangement (2) comprises at least one fire detector (3) for detecting a fire and at least one processing unit, in particular at least one image processing unit (4), wherein the at least one fire detector (3) and the at least one processing unit, in particular the at least one image processing unit (4), provide data, with a communication device (5), wherein the at least one fire alarm arrangement (2) is connectable or connected to the communication device (5) for transmitting the provided data, wherein the at least one fire alarm assembly (2) and the communication device (5) each have at least one wired bus connection (7), wherein the at least one fire alarm assembly (2) and the communication device (5) can be connected to each other via a wired bus connection (8) by means of the at least one wired bus connection (7), wherein the at least one fire alarm arrangement (2) for transmitting the data additionally has at least one wireless connection port (9), wherein the communication device (5) comprises a further wireless connection port (9), wherein the wireless connection ports (9) of the at least one fire alarm arrangement (2) and the communication device (5) are connectable or connected to each other for the transmission of data via a wireless network unit (10), where the data with a small data size are allocated to the wired bus connection (8) for transmission at low data rates, wherein the data with a large data size is assigned to the wireless network unit (10) for transmission at high data rates, wherein the fire alarm device (1) comprises at least one repeater (11), wherein the wireless transmission of the data between the wireless connection terminals (9) of the communication device (5) and the at least one fire alarm arrangement (2) is carried out indirectly via the at least one repeater (11).

In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The UE determines an access type for connecting to an IMS is a low data rate / high latency access type. The UE performs one or more actions based on a predefined access profile, including: indicating, to a network entity of the IMS during an IMS registration procedure, one or more pre-configured parameters applicable to the low data rate / high latency access type; executing one or more pre-defined signaling sequences for the low data rate / high latency access type; using one or more pre-defined media handling components without negotiation with the IMS; and applying one or more extended timer values for one or more signaling protocols, wherein the one or more extended timer values are longer than corresponding timer values used for a higher data rate / lower latency access type.

The disclosure relates to a method and a control device for data-optimized control of a driving maneuver. The method comprises several procedural steps. The following takes place: - Acquisition of sensor data from a large number of sensor units in the vehicle; - Providing the acquired sensor data at a reduced data rate as preliminary sensor data to a central control device; - Evaluating the provided preliminary sensor data in the central control device; - Dynamic adjustment of the vehicle's data transmission rate based on the current driving situation of the vehicle and the functional requirements of a driving maneuver to be executed, whereby the data transmission rate is varied in different phases of the driving maneuver in order to aim for a level of detail in the sensor data adapted to the relevance of the driving situation and / or the driving maneuver; - Executing the driving maneuver based on the acquired sensor data, using detailed sensor data with a high data rate in maneuver phases with high data relevance and sensor data with a lower data rate in maneuver phases with low data relevance; and - Providing control information to the motor vehicle to execute the driving maneuver.

The present Invention relates to methods and devices for sending and receiving electrical signals through "dissipative" media such as soil, mud, or sea / fresh water to distances extending to several tens of meters. Present methods for sending through such media use very high-power levels ranging to Mega-Watts and employ large equipment. Very Low Frequency (VLF) and Extremely Low Frequency (ELF) communication systems used to communicate with submarines are an example. In contrast, methods and devices disclosed here are powered by general purpose batteries (such as Lithium-Ion batteries) and can be used with consumable items as small as a mobile phone. The invention achieves this functionality by combining near field resonant magnetic coupling with symbol stretching at the transmitting end and matched filtering at the receiving end. While the range of near field magnetic coupling is limited to approximately 1' (30 cm), the combination disclosed in the invention enables to send / receive signals extending to several tens of meters. This new technology (the combination) opens several new applications. At present, there is no systematic methodology to detect victims of natural or man-made disasters such as landslides, earthquakes, and disasters where the victims are buried in media such as soil or mud. The invention can be used to add functionality to consumer devices such as mobile phones or similar so that they can be easily located. Alternatively, a novel device one can easily carry (smaller that the size of a mobile phone) can be introduced, which would be very useful for communities living in countries prone to natural disasters. Scanning for victims can be done fast by mounting the search device on a drone. The methods and devices disclosed can also be used for underwater communication between diver to diver and diver to vessel and the technology is especially suitable for freshwater applications. In addition, this technology can also be used for communication in mines in emergency situations. It is suggested to use in emergency situations due to low data rates.

The invention provides a voice communication method and device and related equipment, and is applied to the technical field of communication. The method comprises the following steps: acquiring collected voice data; extracting text data and rhythm characteristic data in the voice data; performing compressed encoding on the rhythm characteristic data to obtain a rhythm vector; packaging the text data and the rhythm vector into a collaborative coding data packet; and sending the collaborative coding data packet to the second terminal, so that the second terminal synthesizes the voice data according to the text data and the rhythm vector in the collaborative coding data packet. According to the embodiment of the invention, the text data and the rhythm feature data are extracted in parallel after the voice data are acquired, and the rhythm vector obtained by compressed coding and the text are jointly packaged into the collaborative coding data packet and transmitted, so that the core problem of hyperlanguage information loss in extremely narrow band semantic communication is effectively solved; and the voice communication naturalness and the information integrity are improved at an extremely low data rate.

A method of a low power listening mode includes announcing, by a first wireless device is operating in a low power listening mode. The first wireless device in the low power listening mode receives an initial frame having a single spatial stream and a low data rate from a second wireless device. The frame requests a frame exchange with the first wireless device. The low data rate is lower than a maximum data rate of the first wireless device. A reply to the initial frame is transmitted to the second wireless device in a single spatial stream with the low data rate. The reply acknowledges an association with the second wireless device. The first wireless device wakes from the low power listening mode to a full capacity mode, and performs a frame exchange with the second wireless device in the full capacity mode.

Methods, devices, and system for Enhanced Wideband HF data transmission with adaptive interference avoidance and other improvements. Several embodiments describe a mesh network comprising a plurality of transmitting and receiving nodes in a congested band. The network senses the interference spectrum occupancies at a plurality of receiver nodes and synthesizes transmit waveforms at the transmit nodes so that the spectra of the transmit signals fit into the gaps of the interference spectra at the receiver nodes. The waveform is based on FDM, including OFDM, with adaptive tone suppression at the transmitter. The spectrum occupancy information at each node is continually shared in the background among all nodes using a low data rate, Fountain code with erasure sensing at the receivers, which guarantees robust delivery.

The invention discloses a unified hybrid circuit based on two-dimensional isolation and an asymmetric transceiver system, and belongs to the technical field of high-speed analog integrated circuits. The unified hybrid circuit is a passive resistance network topology shared by a forward channel and a reverse channel, and a two-dimensional isolation mechanism is constructed through asymmetric parameter configuration. The mechanism comprises the following steps: in an amplitude domain, configuring a high output signal swing for the FC, and configuring an ultralow output signal swing for the BC to form high-strength passive isolation; in the frequency domain, separation is realized by using the frequency spectrum difference between the FC high data rate signal and the BC low data rate signal. The FC receiver of the transceiver system only needs the equalizer to focus on compensating the channel loss; and the BC receiver filters high-frequency residues through a simple low-pass filter. Echo interference in asymmetric SBD communication is efficiently restrained from the source, the system performance and the integration degree are remarkably improved through a low-complexity and low-power-consumption framework, and the method is suitable for high-speed interconnection scenes such as the vehicle-mounted Ethernet.

An HFC network device transponder provides low data rate, low power, bi-directional transmissions between HFC network devices, such as RF amplifiers, in an HFC network. The HFC network device transponder may provide switching to allow bi-directional transmissions over either upstream or downstream signal channels, which enables direct communication with other HFC network device transponders without using a headend. In some embodiments, the HFC network device transponder may be configured to provide bi-directional transmissions using a LoRaWAN® based packet mode and / or a SCTE 25-1 based serial mode.

A computer system for offloading sensor data processing is disclosed. An aggregation processor circuit may receive multiple data streams from corresponding ones of multiple sensors included in the computer system. The aggregation processor circuit may send a first portion of a particular data stream of the multiple data streams to a primary memory circuit for storage, and send a second portion of the particular data stream to a secondary memory circuit. The aggregation processor circuit may send the second portion of the particular data stream at a lower data rate than the first portion of the particular data stream.

The invention belongs to the technical field of low-speed target detection. The invention provides a data rate reducing method for low-speed target detection under high repetition frequency. According to the embodiment of the invention, the N PRI pulse accumulation points in the CPI coherent accumulation time are added and merged into one equivalent PRI data for use according to the data of the adjacent M PRIs, the original N PRI pulse accumulation points are reduced to be one pulse for coherent accumulation, the data rate is reduced to be the original data rate, the data transmission bandwidth is reduced, the calculated amount is reduced, and the data transmission efficiency is improved. And the signal-to-noise ratio loss of low-speed target detection is small. Under the condition that the signal-to-noise ratio loss of low-speed target detection is small, the data rate for low-speed target detection of an unmanned aerial vehicle and the like is reduced under high repetition frequency, the data transmission bandwidth is reduced, the calculation amount is reduced, the operation time is shortened, and the hardware cost is saved.

Systems and methods for topology discovering in a hybrid fiber-coaxial (HFC) network use multicast messaging to HFC devices, such as RF amplifiers, to initiate and perform topology discovery. HFC devices receiving a multicast message send advertisement messages upstream with at least a device unique identifier and listen for advertisement messages received from downstream HFC devices. Messaging may be implemented using low data rate, low power bidirectional communications with and between HFC devices, for example, according to the LoraWAN® remote multicast setup specification TS005. One or more HFC devices that receive device unique identifiers from downstream HFC devices maintain a list of those device unique identifiers. List(s) of HFC devices may be provided to a headend controller and / or a node gateway to compile and maintain topology information, for example, to provide a visual representation of the topology.

A computer system for offloading sensor data processing is disclosed. An aggregation processor circuit may receive multiple data streams from corresponding ones of multiple sensors included in the computer system. The aggregation processor circuit may send a first portion of a particular data stream of the multiple data streams to a primary memory circuit for storage, and send a second portion of the particular data stream to a secondary memory circuit. The aggregation processor circuit may send the second portion of the particular data stream at a lower data rate than the first portion of the particular data stream.