Rapid power detection and automatic gain system and method suitable for multiple channels
A power detection and automatic gain technology, applied in gain control, amplification control, electrical components, etc., can solve the problems of destroying user time slot data, unknown, unusable, etc., to achieve simple solution, fast detection and control speed, Easy to achieve effects
Active Publication Date: 2016-03-23
XIAN HUAXUN TIANJI COMM TECH CO LTD
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Problems solved by technology
Although this method can realize fast power detection and automatic gain control of different user time slots under multiple channels, it still has disadvantages: it is necessary to clearly know the user time slot allocation, but in some cases the user time slot allocation has a great influence on the physical The layer is agnostic, and the AGC method cannot be used at this time
[0007] (1) It is only applicable to the AGC control of a single radio frequency channel, and cannot realize the energy detection and power estimation of multiple radio frequency channels in the smart antenna;
[0008] (2) Signal detection and control speed is slow
[0009] (3) Synchronous detection and control is not realized
If the AGC control cannot be aligned with the user time slot, it may destroy the user time slot data, resulting in transmission errors
Method used
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[0053] The invention proposes a wireless signal energy rapid detection and automatic gain control scheme. Among them, the wireless energy detection device is composed of four parts: amplification and combination system, wave detection system, ADC and logic control.
[0054] as attached image 3As shown, the antenna receives the space wireless signal, and the radio frequency signal of each channel is divided into two channels after passing through the radio frequency attenuator. convert. The other channel enters the normal signal processing channel, and is sent to the data AD (AD1-ADN) after being processed by frequency conversion, amplification, and filtering. FPGA completes data acquisition through data AD, and sends it to The timing synchronization module completes the synchronization, and then completes the demodulation and decoding of the synchronized data.
[0055] The converted voltage is sent to the detection AD for analog-to-digital conversion. Since the response ti...
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The present invention relates to a rapid power detection and automatic gain system and method suitable for multiple channels. The system comprises N antennas, N paths of RF attenuators, a detection shunt, a signal processing shunt, a frame timing module, and an AGC module. The input end of each path of RF attenuator receives the space wireless signal received by the N antenna. The signal which goes through each path of RF attenuator is divided into two paths, one path enters into the AGC module via the detection shunt, and the other path enters into the signal processing shunt. According to the power of a single antenna, combined with the RF link budget which is stored in advance, an AGC policy making module generates an RF attenuation control signal and an IF attenuation control signal. The RF attenuation control signal is used for controlling the N paths of RF attenuators, and the IF attenuation control signal is used for controlling N paths of IF attenuators. The rapid power detection and automatic gain control of a time division user under multiple channels can be realized, thus reception AD saturation is prevented, and the purpose of signal optimal reception is achieved.
Description
technical field [0001] The invention relates to a scheme for fast detection of wireless signal energy and automatic gain control in the field of smart antennas, which can effectively realize fast detection of received signal energy and automatic gain control in a smart antenna system. Background technique [0002] In the smart antenna system, the system uses multiple radio frequency channels to receive radio frequency signals, and synthesizes the received multi-channel signals at the baseband. In the user multiple access mode, the smart antenna system usually uses the time division multiple access method to allocate user time slots. Because the distance between different users and the smart antenna system is very different, the power difference when reaching the smart antenna system is very large, which means that the smart The received power of the antenna system has large jumps between different user time slots. How to realize fast power detection and automatic gain contro...
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Login to View More IPC IPC(8): H04B17/13H03G3/30
CPCH03G3/3042
Inventor 王崇剑
Owner XIAN HUAXUN TIANJI COMM TECH CO LTD