34 results about "Receiver" patented technology

A real-time stream media transmission method based on the video frame split includes the following steps: (1) the stream media server is controlled to explore the whole topological structure of the P2P equivalent internet and gain the whole information of receiver nodes in the equivalent internet; (2) the original video data is captured and compressed; (3) each split video frame is numbered in sequence, and a time-stamp and frame type mark is add to package; (4) the video frame is transmitted; (5) a receiver creates a time-limited buffer area to receive the video frame and saves the video frame in the buffer area in the sequence of the time-stamp; (6) the video frame in the time-limited buffer area is verified and adjusted; (7) the receiver decompresses and plays. And a system is formed by a real-time media transmission method. The invention can support a plurality of video compression method and make a fine particle size split on the base of video compression frame level, the video frame after splitting transmits independently in the topological structure of the P2P equivalent internet, and the video frame rate can be adjusted dynamically in net-speed.

A wireless (e.g., near field or RF) communication device, and methods of manufacturing and using the same are disclosed. The wireless communication device includes a receiver and / or transmitter, a substrate with an antenna thereon, an integrated circuit, and one or more continuity sensors. The antenna receives and / or transmits or broadcasts a wireless signal. The integrated circuit processes the wireless signal and / or information therefrom, and / or generates the wireless signal and / or information therefor. The continuity sensor(s) are configured to sense or determine the presence of a chemical or substance in the package or container, and thus a continuity state of a package or container on which the communication device is placed or to which the communication device is fixed or adhered. The continuity sensor(s) are electrically connected to a set of terminals of the integrated circuit different from the set of terminals to which the antenna is electrically connected.

Disclosed is a method and an apparatus for channel estimation regarding electromagnetic wave multi-path characteristics between a sender and a receiver by using a chirp signal. The method includes the steps of (a) multiplying a received composite signal by a narrowband chirp-shift-keying signal or narrowband multiple center-frequency-chirp signal generated by the receiver itself and outputting a sum of individual frequency components resulting from difference in distance of multiple paths for up-chirp and down-chirp signal portions of a chirp-shift-keying signal, respectively, the received composite signal being formed by generating narrowband chirp-shift-keying signals or narrowband multiple center-frequency-chirp signals by the sender, sending the signals by a transmission antenna, receiving the signals by a reception antenna of the receiver via a multi-path channel, superimposing the signals, and adding the signals; (b) multiplying outputs of the up-chirp and down-chirp signal portions of the sum of individual frequency components and calculating a tolerance frequency output; (c) compensating for a frequency tolerance of the sum of individual frequency components by using the tolerance frequency output and generating a frequency compensation output; (d) compensating for discontinuity of chirp-shift-keying signals resulting from use of the narrowband chirp-shift-keying signals or the narrowband multiple center-frequency-chirp signals regarding the frequency compensation output and generating a discontinuity compensation output having no discontinuity; (e) decomposing the discontinuity compensation output into individual multi-path signals by using a frequency analysis method; and (f) extracting an attenuation component and a time delay component caused by the multi-path channel from the individual multi-path signals by using a size of frequency components of each frequency.

The invention relates to a method for transferring data telegrams (13a, 13b) from a transmitter (11a) to a receiver (11b), wherein a priority level is associated with the data telegrams (13a, 13b) to be transferred. The priority level specifies a priority to be considered for the transfer of the particular data telegram (13a, 13b). In order to perform the transfer of data telegrams having different priority levels with relatively less effort and thus even more quickly, a intermediate storage area (17a, 17b) is associated with each priority level in the transmitter (11a), the data telegrams (13a, 13b) are transferred over the physical communication medium (12) by means of different logical data connections (15a, 15b), wherein the number of logical data connections (15a, 15b) corresponds to the number of priority levels, data telegrams (13a) in the intermediate storage area (17a) associated with a lower priority level are transferred by means of the logical data connection (15a) associated with said priority level until at least one data telegram (13b) is present in the intermediate storage area (17b) associated with a higher priority level, and the data telegram (13b) in the intermediate storage area (17b); associated with the higher priority level is transferred by means of the logical data connection (15b) associated with the higher priority level. The invention further relates to a corresponding electrical device for transferring data telegrams.

Disclosed is a satellite digital multimedia broadcasting (DMB) receiving apparatus and method for tracking the position of a satellite and displaying the satellite's position on a terminal. Additionally, in the presence of an obstacle, notifying a user of a reception impossible state caused by the obstacle, in order to enable the user to efficiently receive a satellite signal. The terminal for receiving digital broadcasting included a receiver for receiving a digital broadcasting signal, a geo-magnetic sensor for determining the position of the terminal, a controller for generating broadcasting reception state information using the azimuth of a satellite and the position of the terminal, and a display for displaying the broadcasting reception state information.

A contact type rolling machine integrated compaction sound wave detection system comprises a sound emission sensor, an industrial personal computer, a data acquisition instrument, a GPS / BDS receiver and the like, when a filling layer is rolled, a sound wave field time domain signal formed near the rolling layer is received by the sound emission sensor vertically installed on a support directly connected with a vibration wheel, and a sound wave field digital signal is formed through sampling; meanwhile, the GPS / BDS receiver provides a space signal related to a rolling position, filtering and spectral analysis are carried out on the sampled sound wave signal, an effective sound signal harmonic amplitude is obtained, a contact type sound compaction index is established according to the correlation between the amplitude ratio and the compaction degree of the filling material, and a space-time compactness distribution diagram of a rolling area is displayed on an airborne display in combination with GPS space position information. The system has the advantages of being accurate, continuous, real-time, small in discreteness, low in cost and the like and is suitable for continuous compaction quality control of filling materials, and the intelligent continuous compaction function can be easily achieved by controlling operation parameters of the rolling machine through compaction degree feedback.

The invention relates to the technical field of water meters, and discloses a split waterproof sealed water meter which comprises a meter body mechanism, an electronic mechanism and a reading mechanism, the side face of the meter body mechanism is fixedly connected with the electronic mechanism, the outer surface of the electronic mechanism is connected with the reading mechanism through a wire, and the meter body mechanism comprises a water meter body. A water outlet pipe is fixedly connected to the side face of the water meter body, an instrument panel is fixedly connected to the front faceof the water meter body, the electronic mechanism comprises a protective shell, a water inlet pipe is fixedly connected to the side face of the protective shell, and a circuit board is fixedly connected into the protective shell. According to the split waterproof sealed water meter, a traditional mechanical water meter and an electronic water meter are combined, meanwhile, the connecting flat cable is arranged to be connected with the reading meter, when line connection is inconvenient during installation, reading transmission can be conducted through intercommunication of the wireless transmitter and the wireless receiver, and therefore the using speed of the water meter is improved; and the effect of convenient use is achieved.

The invention belongs to the technical field of Loran C, and particularly relates to a Loran C signal generator, which comprises a central processing unit, wherein the central processing unit is connected with a Loran C timer, a pulse control module, a Loran C generation module, a data coding modulation module and a noise generation module, wherein the Loran C timer receives a 10 MHz frequency standard signal and a 1 PPS signal of a rubidium clock, the Loran C timer generates a basic timing signal of the Loran C signal generator and realizes a modulation control function, and the pulse control module is mainly used for determining a phase code of a Loran C signal and controlling an Eurofix modulation quantity. The Loran C signal generator has the Loran C signal transmission capability for generating random noise interference, can precisely control the intensity and noise of the transmitted signal, and provides a simulated excitation signal for the development and debugging of a Loran C receiver.

An illustrative example sensor device (20) includes a transmitter (24) and a receiver (26) having at least one lobe (38) and at least null (40, 42). A cover (28) near the transmitter (24) and the receiver (26) includes a surface (60) facing toward the transmitter (24) and the receiver (26). The surface (60) is at an angle relative to the receiver (26) to direct at least some radiation (56) transmitted by the transmitter (24) and reflected from the surface (60) toward the at least one null (40,42) of the receiver (26).