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229results about How to "Simple and reliable" patented technology

Device and method for narrowband interference suppression of OFDM (orthogonal frequency division multiplexing) receiver

The invention discloses a device and a method for the narrowband interference suppression of an OFDM (orthogonal frequency division multiplexing) receiver, wherein the device is located on an OFDM receiving chain and between an intermediate-frequency processing module and a base band processing module; and the device is characterized by comprising a narrowband interference searching module, a digital notch filter coefficient generation module and a time domain digital notch filter module which are orderly connected. The method comprises the following steps of: firstly performing a fast Fourier transform on a digital signal input to the OFDM receiver to obtain the frequency spectrum characteristics of the input signal, then judging whether the input signal has a narrowband interference and obtaining the interference characteristics according to a set threshold, then inquiring a preset filter coefficient table according to the interference characteristics to obtain a filter coefficient, finally configuring the filter coefficient in the time domain digital notch filter module; in this way, after the digital signal input to the OFDM receiver passes through the filter, a signal after the narrowband interference is filtered is output, thereby improving the performance of resisting narrowband interference of an OFDM demodulation system.
Owner:GUANGDONG SHENGLU TELECOMM TECH +1

Air conditioner and air conditioner throttling device blockage detection method and system

The invention provides an air conditioner and an air conditioner throttling device blockage detection method and system. The air conditioner comprises a compressor, an indoor unit, an indoor unit evaporator and a counter. The detection method comprises the steps of (1) acquiring the state of the compressor after the air conditioner is powered on and started up; (2) judging whether the continuous running time of the compressor reaches the first preset time t1 or not when the compressor is in a running state; (3) if yes, further judging whether the running frequency of the compressor within the first preset time t1 is greater than the preset frequency f1; (3) if yes, acquiring the running current I1 of the air conditioner and/or the air intake temperature T1 of the indoor unit and the temperature T2 of the indoor unit evaporator at the intervals of the second preset time t2; and (4) judging whether a throttling device of the air conditioner is blocked or not according to the running current I1 of the air conditioner and/or the air intake temperature T1 of the indoor unit and the temperature T2 of the indoor unit evaporator. By means of the method, whether the throttling device of the air conditioner is blocked or not can be detected, and the detection method is simple and reliable.
Owner:GD MIDEA AIR-CONDITIONING EQUIP CO LTD

Adaptive LED Multi-Module Headlamp with Integrated Dipped Beam and High Beam

An adaptive LED multi-module headlamp with integrated dipped beam and high beam includes a dipped beam and high beam following-up adaptive beam pattern control system, a light compensation system, and a color temperature control system; the dipped beam and high beam following-up adaptive beam pattern control system comprising a LED light source module array, the LED light source module array comprising a number of LED light source modules including more than two LED light source modules parallel to each other which forming a direct light source, axes of the more than two LED light source modules paralleling with the center of vehicle body, and including more than one LED light source module arranged outside the direct light source which forming a steering light source, angle between axes of the more than one LED light source module and the center of vehicle body being acute angle, the angle between axes of the LED light module of the steering light source and vehicle body increasing in turn from inside out. A dipped beam and high beam spot during driving straight and following-up beam pattern while turning can be achieved to get a better illumination angle by arranging multiple independent LED light source modules as a headlamp and by controlling different LED light source modules to be lighted during driving straight or turning.
Owner:GUANGDONG RAYTON INTELLIGENT OPTO CO LTD
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