38results about How to "Guaranteed reception quality" patented technology

The invention relates to a downlink transmission frequency division method for cooperating a multipoint transmission CoMP system on the basis of service quality, comprising the steps: a base station differentiates the type of ordered services so as to carry out frequency division according to test data from a user terminal, and also selects cell set participating in cooperative transmission according to the acquired information of the base station adjacent to the cell and according to the receiving power of detected signals; when subcarriers are distributed, the base station set time delay limit of signal transmission firstly, then the transmission time delay and the time delay limit of signals are compared, and real-time users and non-real-time users are differentiated; then the subcarriers are distributed according to the proportion fairness principle, and the feedback of the user terminal is received; firstly the user terminal for the real-time service acquires the substrates with good transmission quality according to the QoS priority order of the users; and then the remaining subcarriers are distributed to the user terminal for non-real-time service. In the downlink transmission frequency division method, not only are different requirements of users for bandwidth and time delay solved, the interference among the users of adjacent cells is also reduced, and the performance of edge-cell users is also improved.

The invention provides a wire base station, a mobile station, a wireless communication system and a wireless communication method. The wireless base station (10) includes a multiplexing unit (13) generating user data; a channel assignment control unit (14) for selecting subcarrier groups from a plurality of subcarriers on two carriers, forming two wireless frames including subchannels generated from the subcarrier groups, and for time-division multiplexing and setting the user data and control data to the two wireless frames; and a transmitting and receiving unit (16) transmitting a wireless signal including the wireless frames, wherein the channel assignment control unit (14) divides all of the subchannels in the two wireless frames into areas of destination sectors, stores the control data only in the corresponding area, and stores the user data in all of the areas in the two wireless frames.

A method and a device in a User Equipment (UE) and a base station for wireless communication are disclosed. The UE transmits a first radio signal including M first-type radio signals transmitted by M antenna port groups and a second-type radio signal transmitted by a target antenna port group; the second-type radio signal carries uplink control information; and at least one of the following is used for determining the target antenna port group from the M antenna port groups: a first antenna port group, wherein a reception for a radio signal transmitted by the first antenna port group is used for generating the uplink control information; M time-frequency resources, wherein the M first-type radio signals are scheduled by M downlink signalings respectively, and the M downlink signalings are searched for in the M time-frequency resources respectively; and, first information, wherein the first information indicates explicitly the target antenna port group.

The invention discloses a soil mass elastic wave velocity testing piezoelectric sensor for centrifugal model test. The sensor is formed by connecting two semi-cylindrical insulating bases into a cylindrical insulating base, wherein a circular ring stepped bore is arranged at the upper half of the insulating base, a cylindrical core seat which is radially provided with a rectangular groove is arranged in the center, a rectangular piezoelectric ceramic plate is embedded into the rectangular groove and extends out of the insulating base, a ring piezoelectric ceramic plate is sleeved outside the cylindrical core seat and is placed on the ledge of the circular ring stepped bore of the insulating base, glass cement is fully filled in the cavity of the insulating base, and the leads of both the rectangular piezoelectric ceramic plate and the ring piezoelectric ceramic plate are led out from the hole of the cylindrical surface of the insulating base. The soil mass elastic wave velocity testing piezoelectric sensor for centrifugal model test has smaller dimensions and less influences to a model soil mass during the centrifugal model test; the lower end of the rectangular piezoelectric ceramic plate is fixed by the cylindrical core seat to form a cantilever structure, the ring piezoelectric ceramic plate is fixed outside the cylindrical core seat, so the signal quality of shear and compressional waves is ensured; and the soil mass elastic wave velocity testing piezoelectric sensor for centrifugal model test has the function of simultaneously testing the shear and compressional waves.

The invention discloses a method and a device for processing received signals of wireless communication system terminals, which ensures the HSDPA signal-receiving quality of the terminals. The invention adopts a technical scheme that the method comprises: acquiring a modulation mode of HS-PDSCH signals in advance by resolving HS-SCCH information; utilizing the time left by acquiring the modulationmode of the HS-PDSCH signals in advance to reset a receiving channel according to the modulation mode, control the ratio of quantization noise to noise power and reduce deterioration of the quantization noise to the demodulation of signal-to-noise ratio; and receiving HS-PDSCH information through the reset receiving channel. This invention is applied in the field of mobile communication.

A technique is provided for delivering content to a user. The user sends at least one quality indicator to a first content-delivery device, referred to as a secondary device. The indicator relates to delivery of a portion of the content by a second content-delivery device, referred to as a primary device. When the secondary device detects an event that might affect the delivery of the content by the primary device to the user, on the basis at least of the quality indicators relating to at least a delivery of content by the primary device, it commands the user to transfer from the primary device to the secondary device in order to enable the secondary device to deliver portions of the content that have not been delivered by the primary device.

The invention discloses a virtual closed loop power control method used in a discontinuity transmission period. In receiving two gusty front and back interval periods of the same transmitting terminal, the method carries out a single operation as follows every a period of fixed time: Virtual signal to interference ratio is calculated; a corresponding TPC command word is set up according to the calculated virtual SIR; the TPC command word is transmitted to an emission end. Good power control effect can be obtained by using the method, thus guaranteeing the reception quality of the emission end and controlling disturbance on other users.

The invention discloses a multimedia broadcast/multicast data transmitting/receiving method, a device and a system. The method comprises the following steps: the multimedia broadcast/multicast data are decoded by low-density parity check codes (LDPC); service data after being decoded can be divided into first information and second information, and then the first information and the second information are transmitted; a receiving terminal judges the environmental quality of a signal path where the receiving end is located; when the environmental quality of the signal path is good, only the first information can be received; while the environmental quality of the signal path is poor, both the first information and the second information can be received. According to different signal path environment where the receiving terminal is located, the receiving terminal can achieve the purpose by adopting the invention that the MBMS service data can be received with lower receiving power while ensuring the received service data quality.

The present disclosure provides a method and a device in wireless transmission. A User Equipment (UE) first receives a first signaling, and then receives a first radio signal, the first radio signal carrying a first bit block. The first signaling is used for determining a transmission format corresponding to the first radio signal. The transmission format corresponding to the first radio signal is one transmission format in a first format set, and the first format set comprises a first transmission format and a second transmission format. A radio signal corresponding to the first transmission format includes P radio sub-signal(s), each one of the P radio sub-signal(s) carries the first bit block, and the P radio sub-signal(s) is(are) transmitted by a same antenna port group.

The invention comprises: a D class amplifier; and a resonant circuit between the output of the amplifier and a stereo speaker or a earphone, which is used for removing EMI interference; the self-resonance point of the resonant circuit is at 470 MHZ where the maximum interference is generated; by the resonant circuit, the falling of receiving sensitivity caused by D class amplifier can be avoided.

The embodiment of the invention provides a sector selection method in cell switch and a base station controller. The method includes: determining a first sector which is the sector in a service cell of a piece of user equipment and is also the sector the user equipment is currently in; determining adjacent sectors of the first sector and judging whether the adjacent sectors are the sectors of a target cell to which the user equipment is switched, and the target cell is the adjacent cell of the service cell; and activating the radio remote units (RRU) or radio frequency units (RFU) of at least one second sector according to the judging result so that the RRUs or RFUs of the at least one second sector send information to the user equipment and the at least one second sector is the sector of the target cell. Thus resource utilization rate is effectively improved and interferences from adjacent cells of the same frequency are reduced while receiving quality of the user equipment is ensured.

The invention provides a real-time adaptive optical self-interference elimination system and a real-time adaptive optical self-interference elimination method based on FPGA and STM32. The real-time adaptive optical self-interference elimination method comprises the following steps: a baseband real-time transceiving module completes real-time transmission of baseband OFDM signals; the up-down frequency conversion module completes conversion between the baseband of the signal and the working frequency band of the antenna to obtain a radio frequency signal of local communication information; a radio frequency signal of the local communication signal is copied into a reference signal, and is sent through a radio frequency antenna module; the radio frequency antenna module receives a radio frequency useful signal from another communication unit and a time-varying radio frequency self-interference signal of a transmitting antenna close to the receiving antenna; after the optical self-interference elimination module receives a useful signal and a self-interference signal, the amplitude and phase of a reference signal are adjusted through the self-adaptive control module, the reference signal and the self-interference signal are cancelled out through a balance photoelectric detector in the optical self-interference elimination module, and the useful signal after self-interference elimination is obtained; and the useful signal after elimination of the self-interference is converted to a baseband and then is sent to a receiving end.

The invention discloses a low-profile double-frequency common-caliber monopole antenna based on a cross-layer folding structure. The antenna comprises an upper-layer dielectric substrate, a lower-layer dielectric substrate and a feed probe. The upper-layer dielectric substrate is directly stacked above the lower-layer dielectric substrate; the upper dielectric substrate is provided with a first non-metallized via hole; the lower dielectric substrate is provided with a second non-metallized via hole; and the feed probe passes through the second non-metallized via hole and the first non-metallized via hole for direct feed. The invention has the beneficial effects that the thickness of the patch antenna is further reduced on the premise of ensuring that the two frequency bands have enough bandwidth, and the center frequencies of the two frequency bands can be independently adjusted, so the patch antenna is suitable for various application scenes.