68results about How to "Increase receiving power" patented technology

A method for operating a wind energy plant having a rotor with at least one rotor blade which has an adjustable pitch angle and a generator coupled to the rotor, and a regulation means which, if a there is a deviation of the rotation speed of the generator or rotor from a rotation speed set point, adjusts the pitch angle of the at least one rotor blade such that the rotation speed set point is reached again, wherein an electrical quantity provided by the wind energy plant by means of a generator and fed into a grid is reduced to a predetermined value in a short time by a reduction of a preset value for the generator, wherein prior to the regulation means noticing a deviation of the rotation speed of the rotor or generator from the rotation speed set point effected by the reduction of the preset value, an adjustment of the at least one rotor blade to a new pitch angle is initiated, wherein at the new pitch angle the rotation speed of the rotor or the generator reaches the rotation speed set point at the reduced electrical quantity and the current wind speed.

A method of determining when cable modems in a distributed digital data delivery service over cable TV hybrid fiber coaxial cable network have a headroom problem and resolving said problem. The method involves measuring the burst power from each cable modem, and if the burst power is too low, requesting the cable modem whose burst power is too low to increase its transmit power, and keeping track of which modems have been requested to increase their power. If a predetermined number of requests to increase power have not resulted in the cable modem transmitting with sufficient power for reliable reception, the cable modem is listed as having a headroom problem. Subsequent requests for upstream bandwidth from all modems with headroom problems are analyzed to determine if the requested burst size is too large and will result in a headroom problem. If so, a calculation as to the maximum number of spreading codes that each modem with a headroom problem can simultaneously transmit on without a headroom problem. The requested burst is then broken down into smaller burst fragments, and appropriate upstream minislot assignments adequate to transmit the burst fragments are made and sent to the cable modem.

The invention relates to the technical field of antenna stabilizing equipment, and discloses a method for stably erecting and accurately aiming at a horn antenna and a triangular support for measurement. The triangular support comprises an antenna top support body, an antenna support sleeve and a foldable antenna weight rack. The antenna top casing support body is connected with the foldable antenna weight rack through the antenna support sleeve. A horn antenna three-point fixing supporting frame which is arranged on the antenna top support body is composed of two inclined telescopic supporting arms and a horizontal main supporting arm. Each telescopic supporting arm is connected by a telescopic rod and a sucking disc which can be rotated by 180 degrees. A receiving antenna and a front-and-back sighting device are arranged on the main supporting arm, wherein the front-and-back sighting device is rapidly and accurately aligned to a microwave signal source. According to the method and the triangular support, the receiving antenna can quickly aim at the microwave signal radiation source, and then the power of received signals is maximum; the horn antenna and the triangular support are stably combined; counter weight is added on the antenna weight rack, and therefore the antenna triangular support is stably fixed on the ground.

The invention relates to a TDD communication method. The method includes that a node selects a channel and a time slot S randomly before sending signals, detects the channel from the time slot 0 until the selected time slot S about whether transmitting signals from other node appear or not, and sends the signals if no other signals are detected or power of signals sent by the other nodes is not greater than a threshold value H; a base station performs channel estimation on each 1 / D fraction symbol point in all channels and judges whether the fraction symbol points have the signals transmitted by the node or not based on a channel estimation result; the base station generates a wave beam for the node and receives the node signal if the signal transmitted by the node is detected; the base station sends a signal through frequency expansion communication after receiving all signals transmitted by the node in the time slot; and the node receives the signals through frequency expansion communication. According to the invention, each channel can receive signals transmitted by a plurality of users at the same time, so that upstream user quantity is increased substantially.

An on-board wireless communication apparatus using an OFDMA scheme includes: a position information acquisition unit which estimates a position after a predetermined time period based on base station position information, mobile station position information, and speed information of mobile station as estimated mobile station position information; a transmission path information storage unit which determines a transmission rate to be applied based on the estimated position information and a distribution of the transmission rate determined by a distance from the base station; a reception buffer unit which stores received data; a reception buffer amount adjustment unit which determines a data amount to be received based on a data storage amount from the buffer unit and a type of the data therein; and a band allocation unit which determines a band requested to the base station by the transmission rate from the storage unit and the data amount from the adjustment unit.

Changes in instructions for increasing / decreasing transmission power that have been decoded from TPC bits are monitored, and when the increase / decrease instructions in a prescribed time interval are biased toward instructions for increasing the transmission power, the peak direction or main lobe width of the transmission beam is changed by regulating the transmission power or transmission antenna weights that correspond to each of a plurality of antenna devices. These processes are repeated until the bias toward instructions for increasing the transmission power in the instructions for increasing / decreasing transmission power is eliminated or until the number of changes of the transmission beam reaches a maximum value that has been set in advance.