7 results about "Target signal" patented technology

The invention provides a radio frequency interference suppression method for a high frequency surface wave radar based on tensor subspace projection. Depending on the distance correlation and direction characteristics of radio frequency interference, joint estimation is performed on a radio frequency interference subspace from multiple dimensions by tensor decomposition. The implementation processcomprises the following steps: performing Doppler sliding window processing based on radar data to finish data segmentation; performing radio frequency interference detection; judging whether interference frequency points exist in a currently-selected data block or not; if radio frequency interference exists, constructing a third-order tensor by using long-distance metadata without sea echo of multiple antenna channels to serve as a training tensor; performing tensor decomposition on the training tensor by using high-order singular value decomposition; estimating a radio frequency interference subspace; and performing distance sliding window and subspace projection processing to obtain data without radio frequency interference. The method can suppress radio frequency interference to a great extent, improve data quality and retain a target signal completely, has a good application effect, improves the detection performance of a radar system, and has important practical application value.

The present invention provides an underwater vehicle cooperation positioning method and system, and relates to the underwater detection technology field. The method comprises: obtaining the position state information of a current underwater vehicle below the water in the last moment; determining whether location signals sent by a GPS buoy are received at the current moment or not; if determining that location signals sent by a GPS buoy are not received at the current moment, obtaining target signals sent by the target underwater vehicle in an adjacent communication range, wherein the target underwater vehicle is at least one underwater vehicle adjacently arranged with the current underwater vehicle, and the target signals comprise underwater acoustic environment parameters and position signals; and performing updating of the position state information of the current underwater vehicle based on the target signals to obtain the position state information of the current underwater vehicle at the current moment so as to effectively relieve the technical problem that a current underwater vehicle cannot satisfy a high-precision location requirement.

A cellular phone includes an inner loop portion and an outer loop portion both for conducting power control. The outer loop portion includes a timer counter. The timer counter transmits a timing signal to a communication quality comparing section when a set length of time elapses. The communication quality comparing section compares a block error rate (BLER) of received data with a target BLER even when a predetermined amount of data has not been received. When the BLER of the received data is equal to or higher than the target BLER, a target signal to interference power ratio (SIR) is decreased. Accordingly, the cellular phone can decrease the target SIR even when the amount of the received data is small, and no request for an unnecessarily high transmission power is made to a base station.

Embodiments of the invention disclose a near field communication (NFC) circuit and a terminal. The NFC circuit comprises a feeding terminal, a signal shielding unit and an NFC control unit, wherein atarget antenna receives a first signal, and the signal shielding unit shields a redundant signal in the first signal, so as to obtain a first NFC signal; during information interaction between the NFCcontrol unit and a control unit in the terminal, if the NFC control unit receives the first NFC signal, a target signal is obtained according to the first NFC signal, the target signal is sent to thecontrol unit so as to enable the control unit to work according to the target signal; and if the NFC control unit receives a control signal sent by the control unit, the NFC control unit obtains a second NFC signal according to the control signal and radiates the second NFC signal through the target antenna. The target antenna is reused, an antenna preset on the terminal is not re-designed or re-arranged, so that the NFC function can be realized on the terminal more easily.

The present invention is suitable for the technical field of networks. The invention provides a rotary table equipment control method, a mobile terminal, rotary table equipment and a wireless networksystem. The rotary table equipment control method comprises the steps of: controlling the rotary table equipment to rotate on the basis of the current signal parameters of the AP equipment arranged onthe rotary table equipment; meanwhile, in the rotating process of the rotary table equipment, enabling the mobile terminal to detect a plurality of sample signal parameters of the AP equipment and angle information corresponding to each sample signal parameter, and controlling the rotary table equipment to autorotate to a target angle according to the target angle information of the target signalparameters determined from the plurality of sample signal parameters so as to adjust the AP equipment to be a better angle. According to the invention, the signal coverage range of the AP equipment is optimized and the stability of data transmission is improved under the condition of not increasing the implementation cost of the AP equipment and the like.

The invention discloses a method and device for determining a bus priority scheme and a traffic system, and belongs to the field of intelligent traffic. The method comprises the following steps: acquiring traffic flow data of a target signal control intersection in a target road network and position data of buses needing to pass through the target signal control intersection in the target road network, wherein the traffic flow data of the target signal control intersection at least comprises traffic flow data of social vehicles passing through the target signal control intersection; determining a basic signal control scheme of the target signal control intersection according to the traffic flow data of the target signal control intersection; and determining a bus priority scheme of the target signal control intersection according to the basic signal control scheme of the target signal control intersection and the position data of the buses which need to pass through the target signal control intersection in the target road network. According to the method, the traffic flow data of the social vehicles at the target signal control intersection are considered when the bus priority scheme is determined, so that the flexibility of the bus priority scheme is improved.