52results about How to "Increase sending power" patented technology

The invention provides an uplink interference coordination combined power control method among communities. The method includes the steps of dividing bandwidth resources of a community into periphery frequency bands and central frequency bands and periphery frequency bands of adjacent communities are orthogonal; determining whether users in the community are central users or periphery users, distributing the periphery frequency bands to the periphery users, and distributing the central frequency bands to the central users; and improving the transmitted power of the periphery users and/or reducing the transmitted power of the central users. According to the method, uplink interference coordination and power control among communities are combined for usage, the transmission efficiency of the periphery users can be further improved, and the interference coordination performance can be optimized.

The invention provides a kind of method for carrying on quick and reliable synchronization by using time region frequency expansion signal mark in digital video broadcast, the signal mark includes long synchronization and the short synchronization signs: the long one is used in quick time and frequency capture, the short one is used in the precise estimation of residual deviation, I/Q unbalanced and other hardware nonideal characteristics. Some important system parameter such as FFT block length and the protection interval length are coded in the short synchronization sign in order to support variant system work mode.

The invention relates to a fire detector (20 to 25) for monitoring a room and for triggering a fire alarm, having a smoke sensor (2) and a temperature sensor (3), wherein a smoke density can be measured by the smoke sensor (2) and a temperature can be measured by the temperature sensor, wherein when a temperature threshold value is exceeded and/or a smoke density threshold value is exceeded an alarm can be triggered, wherein the temperature threshold value is dependent on the smoke density and/or the smoke density threshold value is dependent on the temperature, wherein the fire detector (20 to 25) comprises a memory (10). A complicated evaluation as to whether the temperature threshold value or smoke density threshold value has been exceeded is avoided and the risk of false alarms is reduced as a result of the fact that a matrix is filed in the memory (10), wherein the matrix contains combination values, wherein by means of the matrix one of the combination values can be assigned to the measured temperature and the measured smoke density, wherein the combination value indicates whether the temperature threshold value and/or the smoke density threshold value has been exceeded or fallen below.

An embodiment of the invention discloses an antenna calibration method and a base band unit, belongs to the field of wireless communication and is used for improving the accuracy of antenna calibration. According to the scheme of the antenna calibration method and the base band unit, at least two times of calibration processes are performed in a current calibrating period after a calibrating signal to be sent is generated, and during every calibration process, the calibrating signal is firstly needed to be subjected to channel difference compensation according to a phase compensation coefficient and then sent by a sending channel. Therefore, the signal peak-to-average ratio is reduced and the accuracy of the final calibration result can be improved.

The invention relates to an ultra-long single span optical transmission method based on polarization multiplexing push-pull modulation encoding. The optical transmission method comprises the following steps: dividing a light source of a transmitting end into two paths of polarized orthogonal light by a polarization beam divider, inputting the two paths of polarized light into two identical Mach-Zehnder modulators, carrying out non-return-to-zero code modulation by data and radix-minus-one complement thereof, and transmitting to an optical fiber; and receiving optical signals on the optical fiber by a receiving end, carrying out polarization state stabilization, then separating the two polarization multiplexing optical signals, respectively receiving by a photoelectric detector and converting into two paths of electric signals which pass through a balanced receiver to obtain signal-to-noise ratio gain. The transmission method inhibits the non-linear effect at the transmitting end and improves the transmitting power, and improves the receiving signal-to-noise ratio of the system at the receiving end, thereby improving the overall system performance.

The invention provides a multimode fiber transmission method based on subcarrier index modulation. An additional modulation dimension is added based on the conventional two-dimensional amplitude/phase modulation APM, and the main thinking method is to transmit information through an index number of a subcarrier; some carriers are selected to be silent and data is not sent, so that the possible deep fading at the frequencies can be avoided, and a purpose of restraining intersymbol interference is realized. An SIM is different from the conventional OFDM, all subcarriers of the conventional OFDM can transmit the data and the SIM transmits some bits in a form of subcarrier index numbers. A combinatorial mathematics theory for bit selection can be corresponding to different subcarrier index manners, the part of bits are not transmitted, but are taken as carrier distribution information to be added into the whole system. According to the method, the frequency selective fading of a multimode fiber can be avoided to a certain probability, so that the performance can be remarkably improved, and the bit error rate is reduced.

The invention relates to electronic equipment, user equipment, a wireless communication method and a storage medium. An electronic device according to the present disclosure includes a processing circuit configured to: receive, from a user equipment, a random access request message expected to be accessed to a satellite device; and in response to the random access request message, sending a timingadvance between the user equipment and a satellite device to be accessed to the user equipment. By using the electronic equipment, the user equipment, the wireless communication method and the storage medium disclosed by the invention, the user equipment in a satellite communication system can acquire the control information related to uplink transmission more quickly and effectively.

This invention relates to a power carrier communication circuit, in which, the transmission part includes a load capacitor, a rectifying bridge, a switch tube and a current-limit resistor, in which, one end of the load capacitor is connected to the cable, the other end is connected with an AC input end of the rectifying bridge and the other AC input end is connected to the cable, the drain of the switch tube is connected with the positive of the bridge and the source is connected to the negative, one end of the current-limit resistor is connected to the grid of the switch tube and the other is connected with transmitted signals, the emitter and the collector protecting a triode are connected to the source and drain of the switch tube, two dividing resistors are connected with the base protecting the triode to be parallel to the bridge and output.

Disclosed is a power control method for a mobile station which has at least one frame including a data transmission duration where data is transmitted at a first frequency, and a data transmission-off duration where a second frequency is searched to perform an inter-frequency handoff to the second frequency. The transmission power at the data transmission duration is increased to compensate for the loss of transmission power during the data transmission-off duration. In the method, a base station sets a power control threshold depending on the length of the data transmission-off duration. The base station receives power-increased data and compares the received power of the data signal with the power control threshold. The base station generates a power-up command when the power control threshold is higher than the receiving power, and generates a power-down command when the power control threshold is lower than the receiving power.

The invention provides a power-generation-and-transmission combined dynamic capacity-increase method and a system thereof. The method comprises the following steps of acquiring a lead temperature of each monitoring point on a power transmission line and meteorological data of a circumference environment of each monitoring point in real time, and acquiring operation data of a power-plant sending out line and a lead current of the power transmission line; according to the meteorological data, a maximum allowable temperature of a lead and a physical parameter of the lead, calculating a maximum allowable current-carrying capacity of the lead of each monitoring point; according to a scheduling value which is sent to the power plant by a provincial dispatching system, the maximum allowable current-carrying capacity of the lead of each monitoring point and the operation data of the power-plant sending out line, generating a capacity-increase instruction or a non-capacity-increase instruction so as to control output power of a generator set.

The invention relates to a frame capture synchronization method and device, and the method comprises the steps: obtaining a received signal and a first power value thereof, calculating a cross-correlation value between the received signal and a local short training domain sequence, and obtaining a frame boundary position according to the cross-correlation value and the first power value, the short training domain sequence of the received signal comprising a scrambling code layer; calculating a time domain self-correlation value and a second power value of the received signal from the frame boundary position; peak value judgment is carried out in a second preset search window according to the time domain self-correlation value and the second power value, peak value search is carried out on the received signals meeting the peak value judgment condition in the second preset search window, the maximum judgment value in peak value judgment is found out, and the judgment value is the ratio of the time domain self-correlation value to the second power value; the position corresponding to the maximum value is a synchronization point position, so that synchronization success is judged. According to the invention, the problem of poor synchronization performance of a synchronization method in the prior art under the conditions of large noise interference and low signal-to-noise ratio can be solved.

A communication method and device are suitable for the fields of V2X, Internet of Vehicles, intelligent networked vehicles, auxiliary driving, intelligent driving and the like. The method comprises the following steps: a first terminal device can map first control information to a first transmission resource and map second information comprising second control information and data to a second transmission resource and a third transmission resource, and the second information can be preferentially mapped to the second transmission resource which is not overlapped with the time domain of the first transmission resource, so that the second control information can obtain higher transmission power during transmission, and the reliability is enhanced. In addition, since the second control information is located at the front part of the second information, the decoding time delay can be effectively reduced.

A method, a device, and computer program for a mobile device for reducing interference between a first mobile communication system and a second mobile communication system and a vehicle including thedisclosed device. The method (100) for the mobile device (110) receives information about a location of one or more transmitters of the first mobile communication system and information about a used communication resource of the one or more transmitters of the first mobile communication system, (120) determines a position of the mobile device, and (130) adapts the communication of the mobile device via the second mobile communication system for the position of the mobile device based on the information about the location of the one or more transmitters of the first mobile communication system.

Provided is a communication apparatus including a substrate, a high-frequency coupling device including a coupling electrode and a ground formed as a conductive pattern on the substrate, a communication circuit unit configured to process a high-frequency signal transmitted and received by the coupling electrode, and a resonant unit configured to increase an amount of electric current flowing into the coupling electrode. The high-frequency coupling device is configured such that a longitudinal length is shorter than a lateral length.

An embodiment of the invention provides a method of increasing a transmission rate, comprising: obtaining, at a transmission end, a precoding coefficient P as indicated by , wherein H-1 is an inverse matrix of a channel transfer matrix H on M twisted pairs, and is a diagonal matrix by taking a direct channel in the channel transfer matrix H as a principle diagonal element; performing, according to the precoding coefficient P, precoding on a signal to be transmitted on the M twisted pairs; and transmitting the signal to be transmitted after precoding. Also provided in another embodiment of the invention is a device capable of increasing a transmission rate.