34results about How to "Reduce path loss" patented technology

An In-Building Communications system is disclosed which permits communication in tunnels, underground parking garages, tall buildings such as skyscrapers, buildings having thick walls of concrete or metal, and/or any building which has communication dead zones due to electromagnetic shielding. The invention includes a portable bi-directional amplifier (BDA) system, an outdoor antenna system attached to the building or independently mountable an indoor antenna system attached to the building or independently mountable inside the building, and a standardized, In-Building Communications (IBC) interface box affixed preferably to the exterior of the building. The interface box communicates with antenna systems attached to the building. The fire department or other emergency response personnel carry portable outdoor and indoor antenna systems and a portable, lithium-ion battery powered, bi-directional amplifier (BDA) system which may be connected to the building during an event such as a fire, earthquake, or an act of terrorism or whenever radio coverage enhancement is required. The portable BDA system is simply connected to the standardized, IBC interface box and powered thus restoring communications within.

The invention provides a radio frequency front-end circuit and a mobile terminal. The circuit comprises a first double-pole double-throw switch; a first signal receiving circuit which is connected with one of the first antenna and the second antenna through a first double-pole double-throw switch and receives signals through the connected antenna; a second double-pole double-throw switch; a secondsignal receiving circuit which is connected with one of the third antenna and the fourth antenna through a second double-pole double-throw switch and receives signals through the connected antenna; athird double-pole double-throw switch which is respectively connected with the first double-pole double-throw switch and the second double-pole double-throw switch; a first radio frequency circuit which is connected with the third double-pole double-throw switch and comprises a signal receiving mode or a signal transmitting mode; And a second radio frequency circuit which is connected with the third double-pole double-throw switch and comprises a signal receiving mode or a signal transmitting mode. The circuit is simple in design, radio frequency layout wiring can be shortened on the basis that signal transmitting and/or receiving are/is achieved, and therefore path difference loss is reduced.

The invention discloses an ascending dispatching method to control base station, which comprises the following steps: measuring distance between user equipment UE and base station; distributing UE dispatching authorization with higher dispatching authorization for nearer UE to base station and lower dispatching authorization for farther UE from base station. The invention utilizes limit channel resource, which reduces interference for round UE to improve HSUPA system property.

The embodiment of the invention provides an information transmission method, an initiating node and a response node. The information transmission method comprises the following steps that: the initiating node sends at least one first frame with at least one directional sending direction to a response node on a low-frequency channel for carrying out beamforming training in the sending direction, and receives a second frame comprising a beamforming training result from the response node on the low-frequency channel. According to the embodiment of the invention, the path loss of transmission information on a low-frequency channel can be reduced, and the signal strength is improved.

Provided in the embodiments of the present invention are a communication signal transceiving component, a terminal and a signal transceiving method, relating to the field of network transmission. The transceiving component comprises: a common antenna, a first communication chip, a second communication chip, a coupler, and a switch module. The first communication chip and the second communication chip are connected to the coupler by means of the switch module. The coupler comprises a first branch and a second branch and is connected to the common antenna to transceive communication signals from the first communication chip and/or the second communication chip. The present invention solves the technical problem in the related art that a time-division mechanism, which needs to be utilized when a BT signal and a WLAN signal need to be transmitted simultaneously because the BT and the WLAN use in common the same antenna, may severely affect the data throughput rate of the WLAN, achieving the effect that two kinds of signals may be transmitted simultaneously to enhance the data throughput rate.

The invention discloses wireless charging equipment which comprises a detecting device, a high directivity antenna and a vacuum box. The detecting device and the high directivity antenna are arranged in the vacuum box, the detecting device is used for detecting the position of a charged device, and the high directivity antenna adjusts the direction to be aligned to the charged device for charging according to the charged device position detected by the detecting device. As the wireless charging equipment is used, the charged device can be charged at any position in the wireless charging equipment, and the freedom degree of wireless charging is improved.

The invention provides a particle swarm algorithm-based heterogeneous unmanned aerial vehicle three-dimensional space deployment method and device, and the method comprises the steps: randomly initializing particles in a target region through a multi-target particle swarm algorithm, and enabling each particle to have four-dimensional parameters, including the three-dimensional space position of each unmanned aerial vehicle in a heterogeneous unmanned aerial vehicle group and the use condition of the unmanned aerial vehicle; calculating the change speed of the three-dimensional position of the unmanned aerial vehicle by using a multi-target particle swarm algorithm and updating the three-dimensional position of the unmanned aerial vehicle; based on the combination of discrete binary particle swarm optimization, calculating the variable quantity of the use condition of each unmanned aerial vehicle of each particle, and updating the use condition of each unmanned aerial vehicle; and on the basis, adding price difference and mutation operation in a genetic algorithm to prevent particle swarm optimization from falling into a local optimal solution too early. Through the combination of the multi-target particle swarm algorithm, the discrete binary particle swarm algorithm and the genetic algorithm, the problem that the deployment of the heterogeneous unmanned aerial vehicle needs to meet the network service is solved.

A millimeter wave outdoor passive covering method is provided. A direct irradiation covering method is applied to a direct irradiation area (21) of a base station (1) and a passive reflector (3) irradiation covering method is applied to the shade area (22) of the base station (1). The base station (1) is located in such a way that a base station (1) signal can reach the shade area (22) by reflections as few as possible and passing by a path (5) as short as possible. The passive reflector (3) is located in such a way that base station (1) signal reaches the shade area (22) path (5) via a one-stage passive reflector (31) or a multi-stage passive reflector (32) by total reflections as few as possible and passing by a total distance as short as possible. The method reduces the path loss of large-scale millimeter-wave propagation, increases the number of independent channels, improves the independence of a MIMO channel, does not use a power supply, and is efficient in energy, wide in frequency band and low in cost, and liable to fuse with conventional environment and buildings.

A millimeter wave outdoor smart passive covering method is provided. Direct irradiation coverage is applied to a direct irradiation area (21) and passive reflector (3) irradiation coverage is appliedto a shade area (22). A base station (1) and the passive reflector (3) are located in such a way that a base station (1) signal can reach a shade area (22) path (5) via the passive reflector (3) by reflections as few as possible and passing by a total distance as short as possible. The beam direction (61), the number, and the polarization direction (62) of reflection waves of the passive reflector(3) can be adjusted and changed in real time according to needs. The method reduces the path loss of large-scale millimeter-wave propagation, decreases a loss factor, improves the path loss of the shade area (22), improves the independence of a MIMO channel, can adjust the beam quantity and features of the shade area (22) according to needs, and is efficient in energy, wide in frequency band andlow in cost, and liable to fuse with conventional environment and buildings.

The invention discloses a vehicle-mounted terminal system which comprises a wireless signal transceiving module which is arranged in a shark fin on a vehicle roof and comprises a plurality of antennas; a processing control module which is arranged in the vehicle roof, is positioned on the lower side of the wireless signal transceiving module and is connected with the wireless signal transceiving module through a Wilkinson power divider; and an in-car entertainment which is arranged on a center console in the vehicle and is connected with the processing control module through an optical fiber.According to the invention, the problems of high development cost, high development difficulty and difficulty in period control of the conventional intelligent networked automobile can be solved.