Airborne instrument landing system data processing method based on software radio

Abstract

The invention belongs to the field of airplane navigation communication design and relates to an airborne instrument landing system data processing method based on software radio. The method comprises the following steps: 1, an AM demodulation module processing two digital baseband signals of a same-phase component sequence XI(n) and an orthogonal component sequence XQ(n) so as to obtain envelope signals A(n); 2, dividing the A(n) signals into four signals, obtaining 90Hz signals (i.e., A(n) signals) by subjecting one signal to a 90Hz filter, obtaining 150Hz signals (i.e., Z(n) signals) by subjecting one signal to a 150Hz filter, obtaining voice signals by subjecting one signal to a 300-3000Hz filter, and obtaining DC components by subjecting one signal to a DC component estimation module; 3, performing amplitude measurement on the X(n) signals and the Z(n) signals, wherein the amplitude measurement is performed by intercepting last one tenth of sampling points of a signal sequence; 4, respectively multiplying the 90Hz signals and the 150Hz signals by a coefficient square root of 2 so as to obtain corresponding amplitude output X' of X(n) as amplitude of the 90Hz signals and corresponding amplitude output Z' of Z(n) as amplitude of the 150Hz signals; and 5, according to the X', Y and the Z', obtaining a difference of depth of modulation needed for instrument landing through calculation.

Description

technical field [0001] The invention belongs to the field of aircraft navigation communication design, and relates to a data processing method of an airborne instrument landing system based on software radio. Background technique [0002] The new aircraft navigation communication system consists of various airborne radio equipment, including VOR, VHF, ILS and so on. Because the design of traditional radio equipment is based on hardware, it has a single function and poor scalability. Devices with different functions require different hardware designs. The research and development costs are high, and it is difficult to expand and upgrade. Numerous discrete navigation and communication devices lead to large volume, weight and power consumption of airborne equipment, and lack of versatility and flexibility. Airborne navigation and communication equipment urgently needs an integrated and integrated solution. [0003] The integrated solution based on software radio technology has...

AI Technical Summary

Problems solved by technology

Because the design of traditional radio equipment is based on hardware, the function is single and the scalability is poor. Devices with different functions require different hardware designs. The research and development costs are high, and it is difficult to expand and upgrade.

Numerous discrete navigation and communication devices lead to large volume, weight and power consumption of airborne equipment, and lack of versatility and flexibility. Airborne navigation and communication equipment urgently needs an integrated and integrated solution

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