Envelop detection apparatus and method thereof
A technology of envelope detection and detection tube, which is applied in the direction of transmission monitoring, transmission control/equalization, electrical components, etc., can solve the problems of high linearity system with small time delay, difficulty in meeting high efficiency, high cost, etc., and achieve dynamic detection Large range, low cost, high precision effect
Inactive Publication Date: 2009-08-12
COMBA TELECOM SYST CHINA LTD
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[0008] The envelope detector can have a large dynamic range, but the cost is relatively expensive, and the time delay is large, so it is difficult to meet the requirements of high efficiency and high linearity system with small time delay
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[0022] In the envelope detection device and method of the present invention, the power divider divides the radio frequency signal into two radio frequency signals, performs forward detection and direction detection on the two radio frequency signals respectively to obtain two envelope signals, and then synthesizes one radio frequency signal through a gain filter The envelope signal is amplified and output. Because the present invention divides the radio frequency signal into two radio frequency signal detections, compared with the prior art one radio frequency signal detection, due to the introduction of a power divider, it can play the role of isolating signal interference, the first detection tube and The mismatch of the impedance of the second detection tube is relatively small to the input echo of the input terminal of the radio frequency signal; and since the two-way envelope signals are integrated into one path of envelope signals through the gain filter, the detection dy...
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The invention discloses an envelope detection device and a method thereof. The envelope detection device comprises a power divider, a first detecting tube, a second detecting tube and a gain filter; one output end of the power divider is connected with an input end of the gain filter through the first detecting tube, and the other output end of the power divider is connected with the input end ofthe gain filter through the second detecting tube; the power divider divides an input radiofrequency signal into two radiofrequency signals, one of the radiofrequency signals is changed into a first envelope signal through the positive detection of the first detecting tube, and the first envelope signal is output to the gain filter, the other radiofrequency signal is changed into a second envelope signal through the reverse detection of the second detecting tube, and the second envelope signal is output to the gain filter; and the gain filter integrates the first envelope signal andthe second envelope signal into an envelope signal, and the envelope signal is amplified and output. The envelope detection device and the method thereof have the advantages of lower cost, small timedelay, larger dynamic detection range, and higher precision.
Description
technical field [0001] The invention relates to the field of radio frequency technology design in a mobile communication system, in particular to an envelope detection device and a method thereof. Background technique [0002] In recent years, with the large-scale construction of 3G networks, in order to reduce equipment investment and operating costs, the improvement of power amplifier efficiency has increasingly become the focus of operators. The core issues of power amplifiers are linearization and high efficiency. Higher efficiency can not only save electricity bills for operators, but also save investment in supporting facilities such as power supplies. Moreover, due to the simplification of the production process, the requirements for heat dissipation of the whole machine are reduced, increasing The reliability of the equipment makes the network performance more stable. Therefore, digital pre-distortion technology, envelope tracking technology, Doherty technology, env...
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Login to View More IPC IPC(8): H04B7/005H04B17/00H04B1/7077
Inventor 王宏伟
Owner COMBA TELECOM SYST CHINA LTD