An evs-based ads-b receiver digital gain compensation system and its compensation method

Abstract

The invention discloses an EVS-based ADS-B receiver digital gain compensation system and a compensation method thereof, belonging to the field of aeronautical communication signal processing. The EVS module is connected to the RF processing module; the RF processing module is connected to the input of the A / D module, and its internal gain is adjusted by the digital processing module; the A / D module is used as a bridge between the RF processing module and the digital processing module , its output terminal is connected with the digital processing module and the space spectrum estimation module of the arrival wave signal, and its internal gain is regulated by the digital processing module; the signal from the A / D module is received by the space spectrum estimation module of the arrival wave signal, and the estimated The spatial spectrum data is transmitted to the multiple signal classification spectrum peak search module; the incident signal pitch angle information obtained by the multiple signal classification spectrum peak search module is transmitted to the digital processing module for digital gain compensation to achieve the effect of eliminating the ripple amplitude and reduce the receiver bit error rate.

Description

technical field [0001] The invention belongs to the field of aviation communication signal processing, and in particular relates to an EVS-based ADS-B receiver digital gain compensation system and a compensation method thereof. Background technique [0002] ADS-B technology is a technology based on satellite positioning information used to complete ground / air air traffic control surveillance and air-air surveillance in the form of data links between aircraft and ground, and between aircraft and aircraft. Most of the ADS-B receivers are relatively simple, generally with a zero-IF receiver structure, and the signal processing and decoding work is generally completed in the digital processing module. Since the front-end processing capability of the ADS-B receiver is not strong, a large amount of interference and noise will be brought into the digital processing module. Therefore, it is necessary to post-compensate the gain of the front-end low-noise amplifier to reduce the over...

AI Technical Summary

Problems solved by technology

[0004] 1) Increase the digital AGC compensation gain at the digital end at the cost of resource consumption; this method will take up a lot of computing resources, and eventually lead to an increase in power consumption and cost of the receiver at the same time

[0005] 2) At the expense of cost, use an expensive high-performance low-noise amplifier in the RF front-end; this method will lead to a substantial increase in cost, and the obtained performance value improvement is not enough to return the cost investment

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