161 results about "Radio broadcasting station" patented technology

A mobile station is configured to use, a reception quality of GPS electric wave received by a mobile station, time needed in obtaining GPS location information (or the reception quality of preset television or radio broadcasting) as surrounding environmental information of the mobile station and to control, based on the surrounding environmental information, measurement of a link status (reception quality) and / or reporting of the measurement to a base station. A report from the mobile station is transmitted via the base station and a gateway to a management server which optimizes radio parameter based on the report.

The invention provides a multi-rate wireless mesh network routing method for opportunistic forwarding based on characteristics of radio broadcasting, which comprises the following steps: after a node transmits data, a plurality of nodes are selected as forwarding nodes; in the early stage of network setup, the nodes acquire a direct link delivery fraction via probe packets and set up an adjacency relation; an adjacency matrix of the total network is set up by using link status packets to switch link information; a node forwarding probability analysis system model is used to deduce a measurement (integrated transmission number) applicable to the presence of arbitrary paths, and a forwarding node selection strategy and a forwarding strategy are established on the basis of the integrated transmission number; the optimal path algorithm is used to select a major path, the nodes closer to the destination node than the source node can be selected into a forwarding list, and the forwarding nodes can be confined to the vicinity of the major path according to a certain screening rule; the forwarding node closest to the destination node is set to have the highest forwarding priority, and the forwarding priority is lowered with the increase of the distance from the destination node; and the destination node transmits an end-to-end response to the source node based on a certain rule to inform the source node of the number of the received packets, and the source node performs adaptive regulation on the transmission rate according to the data.

The invention provides a fountain code decoding method suitable for a radio broadcasting system. The decoding method includes: step one, calcifying signals after passing a channel decoder into a group with residual errors and a group without residual errors at the receiving end; step two, for the group without the residual errors, setting a log likelihood ratio (LLR) value with a corresponding bit of zero as a large positive number (such as the positive infinity) and an LLR value with a corresponding bit of one as a small negative number (such as the negative infinity), and collecting LLR values of the group with the residual errors to participate in the decoding process of the function code; and step three, trying to decode all source symbol sets through hard iteration of a coded symbol with certain messages and updating a bipartite graph of the fountain code in a bit domain and an LLR domain during the iteration. The method has the advantages of high spectrum efficiency due to retention of the group with the residual errors and low decoding complexity.

Current radio broadcast stations have limited geographic coverage. We provide system and method to access real-time world broadcast radio transmission. The system is capable of creating a simplex conference bridge with the desired destination radio station either upon demand by the subscriber or auto scheduled by the system as programmed by the subscriber. The concept is expanded to retrieve commercial promotional multimedia clips of advertisers either upon demand by the subscriber or as if pre-initialized by the subscriber, the system sends alert when such promotion occurs. We find good use of these features during free allocated time by carrier access operators.

The invention relates to a radio broadcasting terminal system. The invention provides a self-monitoring type radio broadcasting terminal system, wherein, when sending a test audio, the studio equipment of the system feeds back outdoor audio to the system through an audio collecting device, the system judges the feedback information, thereby the studio equipment is self-monitored partly; when the self-monitoring is started, the system cuts off urban power, which is supplied by the storge battery of the UPS power supply, the self-monitoring of the UPS power supply is started. The self-monitoring type radio broadcasting terminal system of the invention can solve the problems of bad tone quality, easy to be interfered, complex maintenance management, bad interaction performance, unable self-monitoring, improves the performance of the system and reduces hidden danger.

The invention discloses a method for positioning a GSM (global system for mobile communication) mobile communication network terminal. The method comprises the following steps: a. dividing grids for a region covered by a mobile communication network according to the established sizes, and numbering each grid; b. establishing an initial radio broadcasting model of the grid according to a geographical feature and a radio broadcasting feature of each grid; c. generating feature data of the radio broadcasting model of each grip according to DT (drive test) data; d. acquiring a signaling data from the mobile communication network, screening out each conversation in the signaling data, extracting a test report in the conversation, and screening the test report; e. analyzing the matching degree of the screened test report and the feature data of each grip one by one, and calculating a probability value; and f. finding centers of the grids with the highest probabilities, namely the positions of the mobile communication network terminal of the conversation. The positioning method has the characteristics of fast positioning speed and easiness of implementation.

The present invention relates to an apparatus for transforming digital TV broadcasting signals into digital radio broadcasting signals and a method thereof. The apparatus includes: a transport stream generator for transforming TV broadcasting signals outputted from outside into digital TV broadcasting transport streams; a broadcasting transport format transformer for generating digital radio broadcasting transport streams by transforming the digital TV broadcasting transport streams in conformity to a digital radio broadcasting transport protocol based on a radio broadcasting schedule; a digital radio broadcasting multiplexer for multiplexing the generated digital radio broadcasting transport streams generated in the broadcasting transport format transformer; a modulating / up-converting unit for modulating the multiplexed digital radio broadcasting transport streams in a modulation method of digital radio broadcasting and up-converting frequencies of the modulated radio broadcasting signals into radio frequency (RF) signals; and a high-power amplifier for amplifying and transmitting the up-converted RF signals through a transmitting antenna.

The invention provides a method for encapsulating, transmitting and receiving a data packet for a mobile multimedia broadcasting system. The encapsulating method comprises the following steps: A, encapsulating a multiplex packet identifier on an initial position of a radio broadcasting multiplex head; B, generating coding system information according to a network layer data packet to be transmitted, and encapsulating the coding system information in the radio broadcasting multiplex head; and C, generating a radio broadcasting multiplex packet after the network layer data packet to be transmitted is encapsulated in the radio broadcasting multiplex head, wherein the coding system information contains length and an environment identifier of the network layer data packet to be transmitted; the radio broadcasting multiplex head contains type identification of the network layer data packet; and types of the network layer data packet contain a compressed IP data packet and a FULL_HEADER packet. The method for encapsulating, transmitting and receiving the data packet can improve reliability and fault-tolerance performance of transmission of the compressed IP data packet and a session environment data packet in the radio broadcasting system.

The invention discloses a method for estimating the initial heading deviation filtering. The method for estimating the initial heading deviation filtering comprises the following steps: preparing two main boats equipped with high-precision inertial navigation equipment to send subaqueous sound ranging signals with time stamps to a slave boat alternatively; carrying out dead reckoning by the slave boat by utilizing the speed measured by a Doppler velocimeter and the heading measured by an MEMS (Micro-electromechanical Systems) gyroscope, and calculating the distance between each main boat and the slave boat by multiplying the time difference of sending and receiving submarine sound signals and the sound velocity; updating and amending the position of the slave boat by using Kalman filter algorithm, estimating and compensating the initial heading deviation of the gyroscope. According to the method, through the radio broadcasting positional information of the main boat, the slave boat passively receives radio signals transmitted by the main boat, so that the expansibility is improved, and the condition of multiple slave boats can be simulated by using two main boats and one slave boat; the slave boat is provided with low-precision inertial navigation equipment for pushing, and the high-precision inertial navigation equipment of the main boat is utilized by measuring the distance between the slave boat and each main boat, thus the positioning precision is improved, and the equipment cost is greatly reduced.

The embodiment of the invention provides a communication system, a verification device, and a verification and signature method for message identity, and relates to the technical field of communication. The invention provides a mobile access user terminal, and verification of message identity transmitted by the access user terminal in the form of PON and radio broadcasting. The system comprises a signature device and a verification device, wherein the signature device is used for transmitting a message carrying a first signature value; and the verification device is used for receiving the message, which carries the first signature value and is transmitted by the signature device, acquiring sharing key words for verifying the message, computing a second signature value of the message according to the sharing key words and comparing the second signature value with the first signature value, if the second signature value is equal to the first signature value, the message is valid, otherwise, the IP message is invalid. The technical scheme can be widely used in communication systems or computer networks.

The invention provides an antenna device for receiving a radio broadcasting signal, which comprises an antenna unit, a first matching circuit, a second matching circuit, and a switching circuit, wherein the antenna unit receives the radio broadcasting signal; the first matching circuit and the second matching circuit receive the radio broadcasting signal from the antenna unit; and the switching circuit is connected among the antenna unit, the first matching circuit and the second matching circuit, receives a selective signal, and gates the first matching circuit or the second matching circuit to transmit the radio broadcasting signal according to the selective signal. The antenna device gates one matching circuit corresponding to a frequency range of a CMMB (China Mobile Multimedia Broadcasting) signal to be received through a combination of the switching circuit and the two matching circuits, so that a working frequency range of an antenna when the antenna receives the CMMB signal is widened, and the signal receiving stability is improved.

Aspects of the invention comprise a digital mobile terminal system for accessing mobile internet services including a VHF / AM / FM radio receiver and a subsystem that handles interfaces and interactions between the digital mobile terminal and a radio network via a digital (e.g., RDS) data stream, interfaces and interactions between the digital mobile terminal and a mobile internet services platform, and interfaces and interactions between the digital mobile terminal and a user seeking to access and interact with mobile internet services. The present invention also comprises a radio broadcasting server platform for transmitting an RDS data stream including a subsystem that handles interfaces and interaction between the radio broadcasting server platform and a radio network via the digital (e.g., RDS) data stream and interfaces and interactions between the radio broadcasting server platform and a mobile internet services platform.

A wireless Local Area Network provides data service through a data LAN and also provides video broadcast service through a video LAN. A wireless LAN subscriber accesses the video LAN through one of a plurality of Video Access Points (VAPs) that broadcast multiple video programs on a channel having a frequency different than the frequency over which the subscriber accesses the data LAN. Each VAP maintains the video channel in a one-way broadcast-only mode to prevent a wireless LAN subscriber from seeking to uplink information on that channel. In this way, the wireless LAN can employ a common protocol for both data and video transmission, and deliver the video streams at the maximum permissible downlink transmission rate.

The invention discloses a method for the optimized dispatching of an extension type video flow in a partially observational Markovian decision process. The method simplifies an environment under radiobroadcasting, dispatches the extension type video flow under the condition of user state indetermination or partial observability, and establishes a data packet dispatching optimization model by thepartially observational Markovian decision process. The method comprises a state aggregate, a movement aggregate, a state transition function, a retribution function, an observation aggregate, an observation probability and a dispatching startup process. The method comprises the following steps: (1) assuming a radio broadcasting transmission environment model; (2) dividing each frame of data of the extension type video flow into layers, packaging each layer as a data packet, aggregating the data packet of each frame and establishing a data packet dispatching optimization model; and (3) optimizing and dispatching the extension type video flow. The method establishes the data packet dispatching optimization model of the extension type video flow, can enhance the average PSNR value of the video flow and realizes the optimization of the whole video reception quality of a user.

The present invention relates to an improved decoding scheme for use in a concatenated channel decoder. In the present invention, the decoding of the concatenated code is done iteratively to increase the confidence for any corrected symbols. As a result, the overall performance of the decoder is improved. This iterative process comprises using a Maximal a posteriori (MAP) decoder which generates decoded information, to include Erasure Information. The output of the MAP decoder is then supplied to a Reed Solomon (RS) decoder, which attains better error correction performance by using this Erasure Information. This improved output of the RS decoder is then supplied back to the MAP decoder, thereby improving the performance of the system.

There is provided a combined TV and FM radio receiver for selectively receiving TV and FM radio signals via a single tuner using a digital intermediate frequency (IF) stage. The receiver includes a tuner that selects TV band or FM radio band signals and converts the selected signals into IF signals or primary sound IF signals; an IF processor that generates local oscillating signals depending on whether a current mode is a TV mode or an FM radio mode, and converts the IF signals and / or primary sound IF signals, into baseband signals and secondary sound IF signals, respectively; a video demodulator that extracts video signals; an audio demodulator that extracts TV audio signals and FM radio signals according to TV sound or FM radio mode data; and a controller that controls the tuner, and the IF processor, and applies the TV sound or FM radio mode data to the audio demodulator.

The invention discloses a voice broadcast system based on visible light communication. The voice broadcast system based on the visible light communication comprises a visible light emitter and a fixed terminal comprising a photodiode, wherein the fixed terminal is connected with the visible light emitter in a wireless visible light communication mode; the visible light emitter comprises an AD (analog / digital) converter, a parallel-series data conversion module, an LED (light emitting diode) and an LED driving circuit, and the parallel-series data conversion module comprising a first FPGA (field programmable gate array) processer; the fixed terminal comprises a photoelectric receiver, a parallel-series data conversion module, a DA (data / analog) converter and a loudspeaker box and the parallel-series data conversion module comprises a second FPGA processor. The voice broadcast system based on the visible light communication achieves a voice signal wireless communication function through lighting visible light, can be applied to voice information broadcasting in places requiring all-weather lighting such as superstores and subway stations as well as radio broadcasting in places requiring secure communication such as examination rooms, and is convenient to mount and maintain, wide in usage range, energy-saving, environmentally friendly, scientific, reasonable, safe and reliable.

The invention provides a near field wireless local area network communication method of mobile terminal devices, wherein the method is suitable for at least two mobile terminal devices, and one of the mobile terminal devices is defined as the mobile terminal device A. The method is characterized by comprising the following steps that: the mobile terminal device A builds an ad hoc network and performs radio broadcasting, and provides wireless access nodes for other mobile terminal devices; the mobile terminal device A and other mobile terminal devices search and safely access to the ad hoc network via the wireless access nodes; and the mobile terminal devices verified in the network build a near field wireless communication link with each other, and exchange data in the communication link according to a communication protocol. Simultaneously, the invention provides a system using the near field wireless local area network communication method based on the scheme, wherein the system comprises a wireless transmission module, a connection control module, a processing module, an access module, an audio input / output module and a security module.

Provided by the invention is a digital train broadcasting transmitter that comprises a power supply module, an output control module, a control main board and an output display. An input terminal of a power filter is connected with a 48-V train power supply and an output terminal thereof is connected with a rectification circuit; a voltage sampling circuit, a current sampling circuit, a power amplification board is connected in parallel with the rectification circuit; a switching board for switching of a main power amplifier and standby power amplifier is connected with a primary coil of an output transformer and a secondary coil of the output transformer is connected with a broadcast output binding post; the main power amplifier and the standby power amplifier are connected with the control main board; control signals and sampling signals are inputted into the control main board; and the control main board is connected with an emergency control switch, the output display, a monitoring loudspeaker, a pre-stage amplification board, a radio antenna and an AMR module. According to the invention, the beneficial effects of the digital train broadcasting transmitter are as follows: microphone broadcasting, built-in microphone broadcasting, wireless microphone broadcasting, voice synthesis broadcasting, and radio broadcasting can be realized and insertion broadcasting can also be carried out. Meanwhile, train state monitoring is carried out according to the train broadcasting requirement.

The invention provides a method for compressing and decompressing an IP packet of a mobile multimedia broadcasting system. The compressing method comprises the following steps: a stable field of the IP packet is removed from an initial IP packet of a service flow to be transmitted to generate a compressed IP packet; a session environment information table containing the stable field and identification of the session environment information table is transmitted in a control logic channel of the mobile multimedia broadcasting system; and the compressed IP packet is encapsulated in a radio broadcasting multiplex packet containing the identification of the session environment information table, and is transmitted in a service logic channel of the mobile multimedia broadcasting system, wherein the stable field of the IP packet is a data packet header field remained in a plurality of continuous initial IP packets of the service flow to be transmitted. The method for compressing and decompressing the IP packet has a simple realization mode, is applicable to compression and decompression of IP packets with various load formats, ensures that the IP packet has high compression efficiency and reliability, and can effectively reduce processing burden and electricity consumption of an embedded receiving terminal with strain hardware and software resources.

Within a metropolitan area, existing AM / FM radio audience listens to same advertisement message at a time throughout the whole area. Such advertisement could be out of listener's interest if ad sponsor is located geographically far away from the listener. Business owner, such as auto dealer, restaurants or grocery store, may want to reach nearby local customer via radio advertisement. With this invention, radio broadcasting companies can air different advertisements at a time tailored to listeners in a specific sub-areas. They can air multiple advertisements simultaneously each of which is focused on local town or county listeners.

An earphone antenna of a mobile terminal having a switching function by taking radiation characteristics of an antenna into consideration when the earphone antenna is used for receiving Frequency Modulation (FM) radio broadcasting and Digital Multimedia Broadcasting (DMB) is provided. The earphone antenna includes a first connector cable including a first antenna line for receiving DMB, a second connector cable including a second antenna line connected to the first antenna line for receiving FM radio broadcasting, and a switch positioned between the first connector cable and the second connector cable for electrically connecting and separating the first antenna line to and from the second antenna line. The single earphone antenna supports an FM radio broadcasting antenna and a DMB antenna.

A multipurpose radio is disclosed to include a power control unit, which uses a rechargeable battery to provide the necessary working voltage to a LED lamp for illumination, a hand-driven dynamo to generate electricity for recharging the rechargeable battery, a power adapter for charging the rechargeable battery with city power supply, a radio circuit unit for receiving AM and FM radio broadcasting signals, TV audio signals and NOAA signals, and a function mode display unit, which uses a speaker for voice output, a screen for data display, and a selector key for frequency selection.

The invention concerns a service browser process and a system for controlling navigation events between a plurality of services and / or channels of a digital interactive Radio-Broadcasting system (1). The process proposes the services to a user and enables the navigation to other services or channels through control means (15). The broadcasted applications being categorised into at least two types including a first type termed Surfer application designed for controlling navigation and having knowledge of services, the process comprises the steps of identifying (21) Surfer applications from other types of applications, selecting (33) a particular Surfer application, downloading (27, 35) such selected Surfer application within a dedicated part (22) of the Decoder memory (20), called Surfer Cache, and executing (36) the selected Surfer application from the Surfer Cache, whereby the Decoder is under control of the Surfer application.

A method to transmit local area radio broadcast signals (38) that is coupled to wide area radio broadcast signals (39) is described. Local area radio broadcasting is used to transmit audio content from personal audio players into the audio of an automobile. Local area radio broadcast signals (38) are coupled to wide area radio broadcast signals (39) using time based or algorithm based time slot allocation methods. A personal audio player such as a smartphone (32) or a music player is enabled with a local area broadcast radio signal transmitter (53) that transmits radio signals into a desired channel (35) which may be occupied by a wide area transmitter (68). The local area transmission may be mutually exclusive or overlapping with wide area transmission. When overlapping, signal cancellation techniques may be used such that a signature signal from wide area broadcast station may be cancelled by local area broadcast.

The invention discloses a computing method for automatically switching broadcasting stations. Based on broadcasting station automatic switching of a network radio and an FM (frequency modulation) radio, in a work mode of the network radio, when a network signal is weaker than a threshold or / and a network speed is lower than the threshold, a current work radio of the network radio is automatically switched to an associated FM radio broadcasting station; but a period T is delayed and the functions of a radio are closed if an FM antenna signal is lower than the threshold. In the work mode of the FM radio, the current work broadcasting platform of the FM radio is automatically switched to be an associated network radio broadcasting station when the FM antenna signal is lower than the threshold; but the period T is delayed and the functions of the radio are closed if the network signal is weaker than the threshold or / and the network speed is lower than the threshold. According to the computing method for broadcasting station automatic conversion, disclosed by the invention, in use, a user can automatically switch the radio between the network mode and the FM wireless mode, thus time is saved, efficiency is improved, and products are intelligentized.

The invention relates to an IP data packet package, transmission and receiving method of radio broadcasting system. The transmission method comprises following steps: The transmission terminal of radio broadcasting system acquires coding system information from IP data packet to be sent, generates IP multiplexing head according to the coding information, transmits the IP data packet to be transmitted through channel of radio broadcasting system after the IP multiplexing head. The inventive IP data packet package, transmission and receiving method can promotes transmission reliability and error tolerance of IP data packet in radio broadcasting system.