Method for generating scanning signal in microwave landing azimuth signal
A technology for microwave landing and scanning signals, which is applied in radio wave measurement systems, transmission path sub-channel allocation, instruments, etc., can solve the complex process of Taylor shaped data processing, poor directivity of scanning antenna patterns, and difficulty in satisfying system reliability and other problems to achieve the effect of overcoming the relatively complex data processing process, good directionality, and strong anti-interference ability
Active Publication Date: 2017-06-27
XIDIAN UNIV
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Problems solved by technology
The shortcomings of this method are: the Taylor-shaped data processing process of the scanning beam in the microwave landing system is relatively complicated, and the designed scanning antenna pattern has poor directivity
The disadvantage of this method is that the scanning signal generated by the sin x / x function drops slowly at the peak, which is difficult to meet the requirements of the system reliability
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[0032] Attached below figure 1 The specific implementation steps of the present invention are further described.
[0033] Step 1, construct a Gaussian waveform model according to the following formula.
[0034]
[0035] Among them, f(θ) represents the Gaussian waveform model, θ represents the angle of the Gaussian waveform model, and the value range of θ is [-8π, 8π], e (·) Represents the exponential operation with the natural constant e as the base, k represents the constant, k=2ln2, ln( ) represents the logarithmic operation with the natural constant e as the base, B W Indicates the 3dB beamwidth in the scanning antenna pattern of the microwave landing system, B W = 3.5.
[0036] Step 2, obtain the Gaussian waveform value.
[0037] The first step is to calculate the angle value of the Gaussian waveform model corresponding to the angle time point of each selected Gaussian waveform model according to the following formula:
[0038]
[0039] Among them, θ n Indicate...
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The invention discloses a method for generating a scanning signal in a microwave landing azimuth signal. The implementation steps of the method are as follows: (1) building a Gaussian waveform model; (2) obtaining a Gaussian waveform value; (3) processing a Gaussian waveform value; (4) obtaining specific parameter values in a microwave landing azimuth signal; and (5) generating the microwave landing azimuth signal. A scanning signal generated by the method falls steeply at a peak value, the directivity is relatively good, the anti-interference capability is high, an error brought by system simulation can be reduced, and system precision can be improved.
Description
technical field [0001] The invention belongs to the technical field of communication, and further relates to a method for generating a scanning signal in a microwave landing azimuth signal in the technical field of a multi-mode navigation comprehensive test system. The invention can be used to generate scanning signals in azimuth signals, reverse azimuth signals and high-speed azimuth signals. Background technique [0002] The microwave landing system is an all-weather precision landing system. It adopts non-visual approach and landing guidance technology. It has the advantages of high reliability, strong anti-interference ability, and expandable new functions. It can meet the needs of different aircraft types and airports. The ground equipment and airborne equipment of the microwave landing system are configured in a wide variety. The signal emitted by the ground equipment has a wide frequency range, a variety of guidance types, strict time slot requirements, complex format...
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IPC IPC(8): G01S7/02H04L5/00
CPCG01S7/02H04L5/0078
Inventor张辉岳红霞王丹
OwnerXIDIAN UNIV