30results about How to "Reduced reception performance" patented technology

Methods and apparatuses are presented for conducting communications over a shared communication medium involving (a) sending a request from a first node, the shared communication medium organized to include a request signal space and a scheduled transmission signal space, the request signal space including a plurality of request segments each having a different location within the request signal space, the scheduled transmission signal space including a plurality of scheduled transmission segments each having a different location within the scheduled transmission signal space, the request sentin a request segment, (b) obtaining an assignment associating the request with a scheduled transmission segment, and (c) from the first node, sending a data transmission in the scheduled transmissionsegment associated with the request in accordance with the assignment.

The invention discloses a method, a device and a communication device for reducing the interference of a clock to a radio frequency system, which are used for reducing the interference of a clock of the communication device to a radio frequency system. The method of reducing clock interference to the radio frequency system includes: obtaining the center frequency of the channel where the communication device establishes a connection with the network; obtaining the frequency of the bus clock of the communication device, which is called the secondary clock frequency; comparing the center frequency with the secondary clock frequency , to obtain a comparison result; when the comparison result is that the center frequency is a multiple of the secondary clock frequency, the frequency hopping of the bus clock is controlled so that the center frequency is not at the multiple of the secondary clock frequency. By adopting the technical scheme of the invention, the interference caused by the harmonic component of the secondary clock to the radio frequency system can be eliminated, and the reception performance degradation of the radio frequency system can be avoided.

Methods and apparatuses are presented for conducting communications over a shared communication medium involving (a) sending a request from a first node, the shared communication medium organized to include a request signal space and a scheduled transmission signal space, the request signal space including a plurality of request segments each having a different location within the request signal space, the scheduled transmission signal space including a plurality of scheduled transmission segments each having a different location within the scheduled transmission signal space, the request sentin a request segment, (b) obtaining an assignment associating the request with a scheduled transmission segment, and (c) from the first node, sending a data transmission in the scheduled transmissionsegment associated with the request in accordance with the request, and (d); wherein a collection of request segments in the plurality of request segments is separated by a guard zone from an adjacent collection of scheduled transmission segments in the plurality of scheduled transmission segments.

A blood pressure measurement device is mounted with a radio-controlled clock function in a main body without lowering reception performance of the standard radio wave of the radio-controlled clock. A substrate including a sensor mounting surface and a sensor non-mounting surface is mounted with a pressure sensor. An antenna for receiving the standard radio wave including time information of the radio-controlled clock is mounted. The antenna includes a bar-shaped magnetic body core and a coil wound around the magnetic body core. A pump is arranged such that an axis line direction of the motor and an extending direction of the magnetic body core are substantially orthogonal. The substrate and the substrate are arranged so that the sensor non-mounting surface of the substrate and the antenna mounting surface of the sensor face each other.

An antenna system comprises: a first antenna that has a first antenna conductor and a first feeding point and that receives broadcast waves of a predetermined frequency band; a second antenna that has a second antenna conductor and a second feeding point and that receives noise from a noise source; and a cancel device that cancels, from the received signals acquired by the first antenna, the noise signals acquired by the second antenna. The antenna system is adjusted such that: the radio waves of the broadcast waves of the predetermined frequency band equally reach the first and second antennas; the reception gain of the predetermined frequency band received by the second antenna is lower than the reception gain of the predetermined frequency band received by the first antenna; and the output of the noise received by the first antenna is equal to the output of the noise received by the second antenna.

An apparatus for hierarchical modulation generates a first hierarchical symbol sequence by mapping a first hierarchical bit sequence corresponding to an information bit sequence into a bit position in a first signal constellation according to a first modulation method. Further, the apparatus for hierarchical modulation generates a second hierarchical symbol sequence by mapping a second hierarchical bit sequence corresponding to an additional information bit sequence into a bit position in a second signal constellation according to a second modulation method and then phase-rotating the second hierarchical bit sequence as much as the phase of each first hierarchical symbol. The apparatus for hierarchical modulation generates a hierarchical modulating symbol sequence by adding up symbols in the generated second hierarchical symbol sequence and symbols in the first hierarchical symbol sequence.

The invention discloses a method, a multimode terminal and a network side device for reducing multimode mutual interference. The method comprises that if discontinuous interference on a second mode exists when the multimode terminal is in a first mode, the multimode terminal adjusts signal quality indication values of the second mode according to characteristic parameters of the discontinuous interference and the fact that whether the multimode terminal is in an interference gap of the first mode when signal quality of the second mode is measured, and the multimode terminal sends adjusted signal quality indication values to a network side. According to the method, the multimode terminal and the network side device, the multimode terminal adjusts reported signal-to-noise ratio (SNR) values on a terminal side according to characteristics of the discontinuous interference or calculates SNR values on the network side, so that reduction of receiving performance of the terminal under the influence of the discontinuous interference is avoided.

The present application discloses a radio frequency circuit, a radio frequency circuit control method, device and electronic equipment, belonging to the technical field of electronic equipment. The radio frequency circuit includes first and second radio frequency transceivers, first, second and third radio frequency modules, double-pole double-throw switches, first, second and third antennas, and the connection between the third antenna and the second antenna is The isolation degree is greater than the isolation degree between the first antenna and the second antenna; the first port of the first radio frequency transceiver is connected to the first end of the first radio frequency module, and the second end of the first radio frequency module is connected to the double pole double The throw switch is connected with the first antenna and the third antenna; the second port of the second radio frequency transceiver is connected with the first end of the second radio frequency module, and the second end of the second radio frequency module is connected with the first end of the second radio frequency module through the double pole double throw switch. An antenna is connected to the third antenna; the third port of the second radio frequency transceiver is connected to the second antenna through the third radio frequency module. This solution solves the problems of difficult implementation and poor performance of RF circuit solutions for WIFI 5G and N79.

The invention discloses an overheat alarm plug for a hair dryer, which comprises a casing, the outer wall of the casing is inserted with two external electric posts, and the inner wall of the casing is fixed with two inner plugs corresponding to the positions of the two external electric posts. The side wall of the housing is provided with a turning slot, the inner wall of the turning slot is slidably connected with a turning plate, both ends of the turning plate are fixed with insulating plates, and the side wall of the turning plate is fixed with Two sets of shrapnel arranged symmetrically. The advantage is that when the temperature at the plug position rises to a certain level, the air bag will expand enough to make the connecting piece contact with the connecting piece, so that the lamp tube will flicker when it is powered on, and the user will be warned. Large and close to people's ears, the user's ability to receive external sounds is weakened, and the sensitivity to light is strong. Therefore, using flashing lights to warn has a better effect and enables users to respond faster.

Combining the untrusted relay full-duplex transmission method and system with zero-forcing scrambling at the sink, the source A sends a secret signal x to the full-duplex relay R, and the sink B simultaneously sends the artificial noise interference signal v to the full-duplex relay R; full-duplex relay R receives y R , and use the amplification and forwarding protocol to forward the signal x R =βy R To the destination B, β is the amplification and forwarding factor; the destination B adopts the maximum ratio receiving strategy to design the receiving vector r=g B , the received signal is y B = r H (g B x R +n B ), n B N for sink B Br ×1 dimensional additive white Gaussian noise vector, N Br is the number of receiving antennas. The invention improves the transmission efficiency and effectively reduces the reception effect of the eavesdropping node on the secret signal.