165 results about "Digital radio" patented technology

A method comprising: at an importer of an IBOC digital radio broadcasting system: establishing a data link to an audio client configured to buffer audio from an audio source over a buffering duration, to produce buffered audio; receiving, from the audio client, an indication of the buffering duration; identifying a logical channel of an IBOC waveform assigned to the audio client and configured to transmit PDUs of the audio at a PDU rate; computing a quantized number of PDUs that is greater than one into which the buffered audio is to be divided at the audio client based on the buffering duration and the PDU rate; sending, to the audio client, an indication of the quantized number of the PDUs; and upon sending importer data requests to the audio client over the data link, receiving, from the audio client, client data responses each including the quantized number of the PDUs.

The disclosed invention provides a system and method for processing air traffic control (ATC) communications to ensure real-time validation of aircraft operations and improve pilot logbook accuracy. The system receives ATC voice communications through a digital radio system, converts them to text using a natural language processing model trained on aviation terminology, and extracts key operational data, including aircraft identifiers, instructions, and corrections. This data is correlated with Automatic Dependent Surveillance-Broadcast (ADS-B) and GPS data to verify compliance with ATC instructions. The system creates a continuous transcript of ATC-pilot communications, stitching together conversations across multiple frequencies. Deviations from ATC instructions are detected, generating alerts and logging the events. The method further provides automated reporting, archiving of communications, and enhanced safety metrics in immutable pilot logbooks, using blockchain technology for secure storage. This invention improves operational safety, transparency, and flight data integrity.

The invention provides an all-digital beamforming transmitter and an all-digital beamforming transmitting method based on a digital radio frequency technology. The all-digital beam forming transmitter provided by the invention comprises a plurality of baseband signal generators, a quadrature modulator, an adder, a 1-bit increment integral modulator, a digital-to-analog converter, a radio frequency front end and an antenna which are connected in sequence, each baseband signal generator is connected with one path of quadrature modulator and one antenna, one path of quadrature modulator comprises a plurality of quadrature modulators, and each baseband signal generator generates a pair of baseband signals; the number of the quadrature modulators in the one-path quadrature modulator is the same as the number of the adders, the number of the 1-bit incremental integral modulators, the number of the digital-to-analog converters, the number of the radio frequency front ends and the number of the antennas; the number of the baseband signal generators is the same as the number of wave beams formed by the antenna, and the number of the baseband signal generators is different from the number of the quadrature modulators in one path of quadrature modulator.

The invention relates to the technical field of joint robot calibration, in particular to a robot motion indication light spot position rapid acquisition device based on four PSDs, and aims to solve the problem that in an existing joint robot calibration device based on the PSDs, it is difficult to adjust a robot to be aligned to the central points of the PSDs. The second PSD is fixed above the first laser reflection structure, the third PSD is fixed below the second laser reflection structure, and the fourth PSD is fixed above the second laser reflection structure. The first laser reflection structure and the second laser reflection structure are fixed to the reference plate, the reference plate is connected with the lower shell through bolts, a power source, a signal processor and a wireless transmitter are fixed in the lower shell, the signal processor and the wireless transmitter are connected with the power source, and the wireless transmitter and the wireless data transmission radio station conduct transmission through wireless communication. And the wireless data radio station is connected with the upper computer. The problem that laser ray constraint must be aligned with the center of the PSD for repeated adjustment is solved, the operation difficulty is reduced, and the calibration efficiency and precision are improved.

The invention discloses a digital radio frequency transmitter based on optimized mapping modulation, and the transmitter comprises an interpolation unit which is used for improving the sampling frequency of a baseband signal, and obtaining an intermediate frequency signal; the rectangular coordinate-to-polar coordinate conversion unit is used for obtaining the amplitude and phase of the intermediate frequency signal; the sector judgment unit is used for judging the sector where the signal is located according to the high order of the phase of the intermediate frequency signal and determining the phase difference between the sector where the signal is located and the mapping table reserved area; the mapping table generation unit is used for generating an intermediate frequency mapping table; the mapping coding unit is used for respectively calculating index addresses according to the low bits of the amplitude and the phase of the intermediate frequency signal, and searching an initial radio frequency digital sequence with the length of N corresponding to an intermediate frequency mapping table; the radio frequency digital sequence shifting unit is used for circularly shifting the initial radio frequency digital sequence by different digits according to the sectors where the signals are located to obtain correct radio frequency digital sequences corresponding to the signals; and the radio frequency digital-to-analog conversion unit is used for converting the radio frequency digital signal into a radio frequency analog signal.

The invention discloses a miniaturized intelligent integrated radio frequency microsystem, which comprises a main control board and a signal processing board, the main control board integrates a power conversion unit, a clock unit and an interface unit, so that processing clocks in the system are homologous, system interfaces are expanded, and the universality of the system is further expanded; the signal processing board comprises a radio frequency processing unit and a fast hopping frequency source, the radio frequency processing unit is integrated with a second comprehensive processing chip, a zero intermediate frequency chip and a frequency source chip, digital radio frequency integrated design is adopted, the functions of amplification, filtering, frequency conversion, sampling, signal processing and frequency conversion are integrated, discrete devices and split design circuits in the prior art are replaced, and compared with traditional design, the signal processing board has the advantages that the cost is low, and the cost is low. The volume is reduced by about 30%, and the power consumption is reduced by more than 40%.

A method comprises: receiving a first audio stream that conveys audio content and a second audio stream that conveys the audio content and is delayed relative to the first audio stream by a time delay; one-sided filtering first audio segments of the first audio stream to pass only positive frequencies of the first audio segments to first filtered audio segments; one-sided filtering second audio segments of the second audio stream to pass only positive frequencies of the second audio segments to second filtered audio segments; cross correlating the first filtered audio segments against corresponding ones of the second filtered audio segments, to produce cross-correlation results; detecting a peak indicated by the cross-correlation results; and estimating the time delay based on a position of the peak, to produce an estimated time delay.

The invention discloses a signal integrity simulation analysis method for a digital radio frequency hybrid microsystem, and belongs to the field of advanced packaging of integrated circuits. According to the method, a complete analysis process accompanied with product research and development is established, systematic work of qualitative simulation evaluation, rule design and quantitative analysis verification is sequentially carried out in various stages of project approval demonstration, scheme design, design verification and the like of product design, and process conditions, material characteristics and rationality and feasibility of system layout are rapidly evaluated; qualitative support is provided for agile design of the scheme; designing rules and optimization ranges of structures such as a radio frequency link, a digital link and a coupling shield are formulated according to process and material rules, and accurate initial input is provided for comprehensive design of a product; according to the layout wiring form, digital, radio frequency and coupling areas are formed through division, time domain analysis, frequency domain analysis and near field analysis are carried out in a targeted mode, quantitative reference is provided for judging design reasonability, and an effective basis is provided for optimizing design content.

A PAPR optimization method for digital FM radio transmission is disclosed. The method includes generating an Orthogonal Frequency-Division Multiplexed (OFDM) signal for transmission and applying an adaptive PAPR reduction algorithm to the generated signal. The method further includes determining a Modulation Error Ratio (MER) for one or more frequency sidebands and iteratively adjusting PAPR reduction parameters based on the measured MER values. The adjustment includes optimizing the number of PAPR reduction iterations for a highest-power primary digital sideband, optimizing QAM constellation constraint limits, and adjusting convergence bias weight settings for a lowest-power primary digital sideband and / or secondary digital sidebands to maintain target MER values. The method further includes updating PAPR reduction parameters in real-time until the measured MER values meet predefined target thresholds and executing instructions to coordinate the operation of an optimization servomechanism, ensuring dynamic PAPR optimization across multiple transmission modes.

Techniques are described related to digital radio control and operation. The various techniques described herein enable high-frequency local oscillator (LO) signal generation using injection locked cock multipliers (ILCMs). The techniques also include the use of LO signals for carrier aggregation applications for phased array front ends. Furthermore, the disclosed techniques include the use of array element-level control using per-chain DC-DC converters. Still further, the disclosed techniques include the use of adaptive spatial filtering and optimal combining of analog-to-digital converters (ADCs) to maximize dynamic range in digital beamforming systems.

The invention belongs to the technical field of radars, and discloses a radar networking anti-interference method based on a digital array radar software definition multifunctional digital radio frequency technology. Various working modes of conventional radar narrowband and broadband detection, multi-station cooperative detection and anti-interference, external radiation source cooperative detection, single-station / double-station MIMO detection, channelized external electromagnetic environment cognitive reconnaissance, cooperative interference, detection and drying integration, multi-platform communication and the like can be realized at the same time. High-isolation signal frequency diversity is realized by using a wide-narrow band signal receiving and transmitting channelization technology, effective coding isolation diversity is realized by using coding pulses, and multifunctional signal time diversity is realized based on partial function time division multiplexing. According to the method, a set of broadband hardware system with composite functions is reused, electronic functions required by a radar networking system are achieved through different software, the purpose of software definition functions is achieved, and meanwhile the anti-interference capacity of the networking system is enhanced.

Presented are control systems for governing analog and digital radio services in motor vehicles, methods for making / using such systems, and vehicles equipped with such systems. A method of controlling a vehicle includes an in-vehicle radio tuner receiving selections of broadcast radio stations output by analog signals and / or streaming radio stations output by digital signals. A vehicle controller retrieves a memory-stored broadcast station service (BSS) map with a service contour containing available broadcast radio stations having sufficient signal strength within a designated area. The controller receives geopositional data indicative of the host vehicle's location, and accesses a remote database to retrieve an updated BSS map that corresponds to the vehicle's location. The controller then determines if the stored BSS map corresponds to the updated BSS map; if not, the radio tuner responsively displays an updated list of available stations revised to reflect available stations contained in the updated BSS map.

An electronic flight assistant device has a first processor coupled to a firmware memory containing machine readable instructions executable by the processor (Firmware) and a random access (RAM) memory; an electronic camera coupled to the processor;a visible-wavelength laser adapted to be gated and scanned by the processor;a switchable cockpit light; at least one digital radio coupled to the processor; anda housing containing the processor, electronic camera, laser, digital radio, and cockpit light; the firmware configured to perform optical reading of cockpit instruments, to determine error conditions, and to scan the laser to provide indications to a pilot of error conditions.

The invention discloses a broadband real-time digital radio frequency simulation method and device, and relates to the technical field of radio frequency simulation, and the method specifically comprises the following processing steps: enabling a radio frequency signal to be accessed to a power matching unit, converting the radio frequency signal into a range suitable for subsequent processing, enabling the radio frequency signal to be accessed to a frequency conversion unit A and a digital optical transmitter and receiver A in sequence, and achieving the remote access of the radio frequency signal; a real-time digital radio frequency simulation environment of N paths of input signals and M paths of output signals is constructed, N paths of intermediate frequency signals are respectively connected into M'path micro-strip power dividers through radio frequency cables, M radio frequency cables are connected behind each micro-strip power divider, and the signals sequentially pass through a circulator A, an amplifier A and a digital signal processing unit and then are connected into a circulator B; the intermediate frequency signal output by the combiner is converted into a radio frequency signal through a frequency conversion unit B and is output; according to the invention, access, exchange and characteristic simulation of large-scale and ultra-wideband radio frequency signals can be realized, modular combination can be carried out according to the number of access signals, and a real-time digital radio frequency simulation environment is constructed.

The invention provides a gain control method, a storage medium and a radio frequency generator, and the method is applied to the technical field of radio frequency, and comprises the steps: determining a target analog gain control parameter and a target digital gain control parameter according to a target power proportion in a radio frequency output instruction when the radio frequency output instruction is received; and performing digital domain gain modulation based on the target digital gain control parameter and a radio frequency signal parameter in the radio frequency output instruction to obtain a digital radio frequency waveform, converting the digital radio frequency waveform into an analog radio frequency waveform, and performing analog domain gain modulation on the analog radio frequency waveform based on the target analog gain control parameter to obtain a target radio frequency signal.

One example discloses a digital radio signal receiver comprising: wherein the receiver is configured to be coupled to a device; wherein the device is coupled to receive an RF signal; wherein the RF signal comprises a desired signal and interference; wherein the receiver is configured to receive a first signal and an interference model from a turn-off device training stage; an on-device training stage configured to construct a second signal and interference model based on the first signal and interference model and the RF signal received by the device; and a decoder configured to generate a data set from the RF signal based on the second signal and an interference model.

Digital radio signals and apparatuses for providing or receiving such signals are described. A digital radio signal has one or more of a link type indicator, indicating the source of image content. A further digital radio signal has compressed SVG data. A further digital radio signal has an indicator indicating a presentation style for text information. A further digital radio signal has an indication of a target group for an information object. A further digital radio signal has signature data. A further digital radio signal has a predetermined start object identifier.

1. The name of the design product: radio (wide screen digital radio). 2. The use of the design product: the design product is used for receiving broadcast, playing audio. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

FIG. 1 illustrates an apparatus for decoding according to an embodiment. The apparatus comprises an interface for receiving a plurality of ATSC Link-layer Protocol packets each of which comprising a packet header and a packet payload encapsulating digital content. Moreover, the apparatus comprises a decoding unit. In a first embodiment, the digital content being encapsulated within the packet payload of each of one or more ATSC Link-layer Protocol packets of the plurality of ATSC Link-layer Protocol packets comprises digital radio content, and / or a Distribution and Communications Protocol packet or a portion thereof, and / or Unified Speech and Audio Coding content or extended High Efficiency Advanced Audio Coding content, and / or Journaline content. The decoding unit is configured to decode the packet payload of each one of at least one ATSC Link-layer Protocol packet of the one or more ATSC Link-layer Protocol packets to obtain the digital content of said one of the at least one ATSC Link-layer Protocol packet.

The present invention belongs to the field of marine observation communication, and specifically discloses a marine multi-channel intelligent communication device and method based on a handshake mechanism. The marine multi-channel intelligent communication device of the present invention is a high-security communication device based on a handshake mechanism and suitable for poor marine observation network environments, designed between the server and the receiving end through a hardware expansion communication interface on the basis of the traditional multi-channel communication technology. The marine multi-channel intelligent communication method of the present invention aims to achieve high-speed and high-security data transmission. For the real-time observation data obtained by the existing commonly used hydrological and meteorological collectors in the marine observation system, it implements the comparison and immediate recall and reissue of delayed, missed, lost, and missing data based on the handshake mechanism, and uniformly deploys multiple communication means such as digital radio stations, dedicated line networks, VSAT, 4G, Beidou, and low-orbit satellite networks (Starnet) to achieve redundant communication guarantees.

An orthogonal frequency division multiplexing digital radio transmitter (110) is arranged to transmit a data packet (200) comprising a plurality of orthogonal frequency division multiplexing symbols (304). At least one of the symbols (304) comprises a plurality of demodulation reference signals (408) in a plurality of first frequency subcarriers (302) of the symbol (304). The transmitter (110) is arranged to transmit a physical control channel (406) at least partially distributed in the remaining frequency subcarriers (302) of the symbol (304) according to a calculated distribution. The transmitter (110) calculates the distribution by arranging the remaining frequency subcarriers (304) in a two-dimensional matrix so that the remaining frequency subcarriers (304) have consecutive indices in a first dimension and have a common increment in a second dimension, and sequentially allocating a plurality of second remaining frequency subcarriers (302) to the physical control channel (406) along a second direction.

A digital broadcast receiver apparatus (1) receives a digital broadcast in an OFDM system. A physical channel of the digital broadcast has a partial reception band (Bp) which is a part of a reception band. The digital broadcast receiver apparatus (1) is provided with a plurality of demodulation units (30) and a synthesis unit (50) that synthesizes the plurality of demodulation units (30). In a first operation mode (m1), the plurality of demodulation units (30) process signals in the partial reception band (Bp) of the same physical channel, thereby outputting a plurality of demodulation signals (s1). The synthesis unit (50) performs a process for the partial reception band (Bp) on the basis of the plurality of demodulation signals (s1). In a second operation mode (m2), one demodulation unit (31) among the plurality of demodulation units (30) processes a signal in all the reception band (Bf) including the partial reception band (Bp), thereby outputting one demodulation signal (s2). The synthesis unit (50) performs a process for all the reception band (Bf) on the basis of the one demodulation signal (s2).

The invention relates to ammunition simulation, and in particular to an incoming ammunition simulator and a simulation method, wherein a broadband radio frequency module receives a radar transmission signal received by a receiving antenna, converts the received radar transmission signal into a first intermediate frequency signal, and then sends it to a digital processing module; receives a second intermediate frequency signal sent by the digital processing module, converts the second intermediate frequency signal into a simulated target echo signal, and then sends it to a transmitting antenna; the digital processing module receives the first intermediate frequency signal sent by the broadband radio frequency module, stores and forwards it by using a digital radio frequency storage device (DRFM), simulates the target distance by using a time delay method, simulates the target speed by using a phase shift method, performs target simulation feature modulation, and sends the obtained second intermediate frequency signal to the broadband radio frequency module; the technical solution provided by the invention can effectively overcome the defect that it is difficult to accurately simulate the distance and speed of the target in the prior art.

An Orthogonal Frequency-Division Multiplexing digital radio transmitter is arranged to transmit a data packet comprising a plurality of Orthogonal Frequency-Division Multiplexing symbols. At least one of the symbols comprises a plurality of demodulation reference signals in a first plurality of frequency sub-carriers of the symbol. The transmitter is arranged to transmit a physical control channel at least partly distributed among a remainder of frequency sub-carriers of the symbol according to a calculated distribution. The transmitter calculates the distribution by arranging the remainder of frequency sub-carriers in a two-dimensional matrix such that said remainder of frequency sub-carriers have indices which are sequential in a first dimension and have a common increment in a second dimension, and allocating a second plurality of the remainder of frequency sub-carriers to the physical control channel sequentially in the second direction.

The invention discloses a digital radio frequency memory and a test method thereof, and belongs to the technical field of digital signal processing, the digital radio frequency memory is realized through an FPGA, the FPGA comprises an ADC conversion module, a storage module, an automatic gain amplification module and a DAC conversion module, and the test method comprises the following steps: receiving an analog signal input from the outside through the ADC conversion module, the analog signal is converted into a digital signal; writing the digital signal into a storage module, and performing data length conversion through the storage module; calculating an amplification coefficient of the digital signal by using an automatic gain amplification module, and amplifying the digital signal output by the ADC conversion module to the maximum power of the DAC conversion module by using the amplification coefficient; and the DAC conversion module converts the digital signal after gain amplification into an analog signal and outputs the analog signal, so as to intuitively judge whether the whole hardware link function of the digital radio frequency memory is normal or not according to the characteristics of the output analog signal.

A method of determining a time of arrival of a packet at a digital radio device is provided. The packet comprises a header portion and a payload portion. The method comprises the digital radio device receiving a radio signal and processing said radio signal to produce an incoming bit sequence, correlating a first section of the incoming bit sequence with a first correlation sequence corresponding to a first section of the packet to determine a first correlation result, correlating a second section of the incoming bit sequence with a second correlation sequence corresponding to a second section of the packet to determine a second correlation result, said second section including at least part of the payload portion, identifying correlation peaks in the first and second correlation results, and determining a time of arrival of the packet at the digital radio device based on said correlation peaks.

The invention relates to an outdoor test flight verification platform for an intelligent fault-tolerant flight control system of a fixed-wing unmanned aerial vehicle, which relates to the field of unmanned aerial vehicles and is divided into an unmanned aerial vehicle platform and a ground platform. The unmanned aerial vehicle platform comprises a fixed-wing unmanned aerial vehicle model which is used for carrying equipment required by flight; the flight control board is used for measuring state information of the unmanned aerial vehicle and controlling flight; the airborne industrial personal computer is used for carrying a control algorithm and calculating and outputting a fault-tolerant control law to the flight control board; and the airborne data radio is used for communication between the unmanned aerial vehicle and the ground. The ground platform comprises a ground data radio station used for communication between the unmanned aerial vehicle and the ground; the Mission Planner ground station is used for displaying the state information and flight adjustment parameters of the unmanned aerial vehicle; and the fault-tolerant ground station is used for displaying a control algorithm output result and algorithm parameter adjustment. The outdoor test flight verification platform for the unmanned aerial vehicle can visually display the flight state of the unmanned aerial vehicle in the actual environment when the unmanned aerial vehicle breaks down, the test flight experience is accumulated, and the test flight trial and error cost is reduced.

The present invention discloses a data flow control method for navigation differential data and a GNSS receiver, the data flow control method comprising: the GNSS receiver acquires navigation differential data; determines whether the amount of navigation differential data is greater than a congestion threshold, and if so, acquires observation data in the navigation differential data, wherein the congestion threshold is acquired according to the theoretical transmission amount within each differential data update interval; filters at least one satellite system observation data in the observation data in a preset order; and transmits the navigation differential data after filtering the satellite system observation data to a digital transmission radio station. The present invention can ensure the stability of the receiver when the radio station broadcasts data in a specific differential data format, and provides an active data flow control solution for navigation differential data in view of the radio station hardware limitation, so that users can stably and efficiently receive differential data for high-precision positioning when using it.

Digital radio altimeter validation system, equipped with an RF input / output interface and characterized by an incompressible latency τ, configured to receive a linear chirp (FMCW) continuous wave signal s(t) with linear frequency modulation f(t) = αt + β and quadratic phase s(t) = e2jπ(αt2 / 2 +βt+γ), which can also be written in complex form in Cartesian coordinates I(t) + jQ(t), t representing time, and configured to re-transmit it with a configurable delay and deliver to the radio altimeter a signal I'(t) + jQ'(t) exactly compensated in frequency for the latency τ by a linear extrapolation of its phase by calculating the difference between the current phase and the phase numerically delayed by the value to be compensated τ.

An integrated digital RF circuit system includes: a substrate, the substrate including a substrate integrated waveguide, the substrate integrated waveguide including a waveguide width, a first plurality of vias and a second plurality of vias; and a source circuit board including a waveguide channel, wherein: the waveguide channel is at least partially positioned between the first plurality of vias and the second plurality of vias; the waveguide channel defines a channel length and a channel width; the channel length is greater than the channel width; and the channel length is greater than the waveguide width.