Closed loop control device and method based on double detection LTE signal levels
A signal level and closed-loop control technology, which is applied in transmission monitoring, electrical components, transmitter monitoring, etc., can solve the problems that broadband time slot signals cannot be closed-loop, and the communication signal amplitude error is large, so as to achieve stable and accurate output and strong universality sexual effect
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[0055] Example 1:
[0056] Aiming at the test requirements for high-precision and long-term stable output of LTE signals with broadband time slots in communication, this embodiment illustrates a device for controlling the amplitude of LTE communication signals by using the high-speed signal processing capabilities of a new programmable device combined with the dual-detection temperature alienation elimination characteristics. Such as figure 1 The hardware schematic diagram of the three-dimensional digital intrapulse LTE high-speed closed-loop control based on dual detection is shown, including 14 units: frequency selective filtering unit, voltage control attenuation unit, first impedance matching unit, channel compensation amplification unit, and second impedance matching Unit, high-power amplifier unit, broadband signal coupling unit, main detection circuit, auxiliary detection circuit, main AD conversion unit, auxiliary AD conversion unit, FPGA data processing unit, DA control u...
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[0076] Implementation 2:
[0077] On the basis of the above-mentioned embodiments, the present invention also proposes a three-dimensional digital intra-pulse LTE signal level closed-loop control method based on dual detection, which is specifically carried out as follows:
[0078] (1) Through the frequency selective filtering unit ①, the broadband communication signal F 1 Carry out signal filtering processing, select appropriate filtering parameters according to the signal occupied bandwidth, and suppress the far-end and near-end spectrum spurious;
[0079] (2) Voltage-controlled attenuation unit ② will filter the broadband communication signal F 1 Control the signal level, the amplitude of which is Lv1. The amplitude of the output signal of the voltage-controlled attenuation unit ② changes linearly with the magnitude of the control voltage. The control voltage comes from the control data of the FPGA. The amplitude variable range of the voltage-controlled attenuation unit ② determine...
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