Radio frequency device, and device and method for detecting standing-wave ratio
A technology of standing wave ratio detection and radio frequency equipment, which is applied in the field of wireless communication, and can solve problems such as poor detection accuracy of standing wave ratio, large detection error, false alarm and missing alarm of standing wave ratio
Active Publication Date: 2014-12-10
ZTE CORP
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Problems solved by technology
[0023] The technical problem to be solved by the present invention is to provide a radio frequency device, a device and a method for detecting the standing wave ratio, which are used to solve the problems in the prior art that the detection accuracy of the standing wave ratio is poor, and large detection errors lead to False alarms and missing alarms of VSWR alarms, to achieve accurate VSWR detection and eliminate the influence of factors that affect the accuracy of VSWR detection
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[0096] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0097]In order to improve the standing wave ratio detection accuracy of RRU (remote radio unit, Remote Radio Unit), the embodiment of the present invention is in figure 1 On the basis of the existing standing wave ratio detection scheme shown, using the vector analysis method, and considering the difference of isolation, source reflection coefficient, forward and reverse gain, the following is given: figure 2 The SWR detection scheme is shown.
[0098] because figure 1 The existing standing wave ratio detection scheme shown has the influence of the isolation factor of the circulator, the influence of the difference in the front and back sampling gain, and the influence of the non-standard 50 ohm antenna port, which leads to the detection deviation of the existin...
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The invention relates to the technical field of wireless communication, disclosing a radio frequency device, and a device and a method for detecting the standing-wave ratio. The method comprises the steps of: first, detecting an open circuit and a short circuit for an antenna port of the radio frequency device; calculating and obtaining a leak signal of a circulator and a forward / reverse gain difference coefficient according to an open circuit detection signal and a short circuit detection signal obtained by detection of a reverse detector;; detecting a reverse detection signal of the reverse detector connected with a standard 50 ohm load and an actual load; then respectively calculating and obtaining a source reflective coefficient and an actual reflective coefficient in combination of the leak signal and the gain difference coefficient; and determining the reflective coefficient of the load to be detected according to the source reflective coefficient and the actual reflective coefficient and finally determining the standing-wave ratio of the antenna port according to the reflective coefficient of the load to be detected. In the invention, the detection precision and the accuracy of the standing-wave ratio of the radio frequency device can be effectively improved.
Description
technical field [0001] The invention relates to the technical field of wireless communication, in particular to a radio frequency device, and a standing wave ratio detection device and method. Background technique [0002] In a wireless communication system, whether the performance of the radio frequency channel of the radio frequency unit is good or not and whether the connection of the antenna feeder of each channel is normal will directly affect the performance indicators such as the amplitude and phase of the radio frequency signal output, thus causing a certain degree of sensory disturbance to the user's sense of communication. influences. The purpose of VSWR detection is to determine whether the antenna is connected properly by detecting the VSWR. However, at present, there is no accuracy requirement for the performance requirements of the standing wave ratio, so the current standing wave ratio detection is usually carried out in a simple way, and no attention has bee...
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IPC IPC(8): H04B17/00G01R27/06H04B17/12
Inventor 王翔田其吴晶
Owner ZTE CORP