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Transmitting and receiving combined polarization optimization method under time-sharing complete polarization radar system
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A technology of transmitting, receiving and optimizing methods, which is applied in the field of radar, and can solve the problems that it is difficult to transmit with full polarization at the same time, and can not achieve clutter and interference suppression well.
Pending Publication Date: 2021-06-04
XIDIAN UNIV
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[0004] At present, the actual radar equipment is still difficult to achieve simultaneous full-polarization transmission, and cannot achieve clutter and interference suppression well.
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Embodiment 1
[0052] See figure 1 and figure 2 , figure 1 It is a flow chart of a joint polarization optimization method for transmission and reception under a time-sharing full-polarization radar system provided by an embodiment of the present invention, figure 2 It is a working principle diagram of the time-sharing full-polarization radar system provided by the embodiment of the present invention. An embodiment of the present invention provides a joint polarization optimization method for transmission and reception under the time-sharing full-polarization radar system, including:
[0053] Step 1. Obtain the prior polarization information of the radar target.
[0054] Specifically, the priori polarization information of the target includes: measured echo data of the first channel, measured echo data of the second channel, measured echo data of the third channel, and measured echo data of the fourth channel, wherein,
[0055] The measured echo data of the first channel is the measured e...
Embodiment 2
[0157] The effect of the present invention can be verified by the following simulation.
[0159] S1: Channel 0 launch, 489 meters (corner mirror), from far to near are trucks, corner mirrors and small houses, staring;
[0160] S2: Channel 1 launch, 489 meters (corner mirror), from far to near are trucks, corner mirrors and small houses, stare;
[0161] S5: channel 0 emission, 1058 meters, from far to near is transformer, angle inversion and staring;
[0162] S7: Channel 1 launch, 1058 meters, from far to near are transformers, angle inversion and staring, about 30m apart;
[0163] s1~s2: 1.2us;
[0164] s5, s7: 5us;
[0165] 1 channel is H channel emission;
[0166] 0 channel is V channel emission.
[0167] Therefore, read in S1, jc_pc_ns represents the cross-polarized pulse compression result of gaze mode, that is, VH, to_pc_ns represents the result of co-polarized pulse compression, that is, HH, and the meaning of S2 is simila...
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Abstract
The invention discloses a transmitting and receiving combined polarization optimization method under a time-sharing complete polarization radarsystem. The method comprises the steps of obtaining a target Kennaugh polarization scattering matrix and a clutter Kennaugh polarization scattering matrix by using obtained target prior polarization information; constructing a transmitting-receiving combined polarization optimization model by using the target Kennaugh polarization scattering matrix and the clutter Kennaugh polarization scattering matrix; obtaining an optimal receiving polarization Jones vector and an optimal transmitting polarization Jones vector by using the receiving polarization Stokes vector and the transmitting polarization Stokes vector based on the transmitting-receiving combined polarization optimization model; according to the optimal transmitting polarization Jones vector, determining time-sharing transmitting horizontal polarization pulses and time-sharing transmitting vertical polarization pulses; and performing signalprocessing on the time-sharing transmitting horizontal polarization pulses and the time-sharing transmitting vertical polarization pulses in sequence by using the optimal receiving polarization Jones vector to obtain echo power. According to the optimization method, clutter and interference suppression is realized through a polarization optimization method and the like under a time-sharing complete polarization radarsystem.
Description
technical field [0001] The invention belongs to the technical field of radar, and in particular relates to a method for optimizing transmission and reception joint polarization under a time-sharing full-polarization radar system. Background technique [0002] Radar is faced with the threat of two major types of jamming, namely suppressive jamming and deceptive jamming. Suppressive jamming is more common for deceptive jamming. It floods the target signal with noise and interferes with radar detection and parameter measurement. Radar needs to suppress the jamming through filtering and other measures to improve the dryness ratio in order to effectively counter the jamming. [0003] Polarization filtering is a new technology to improve the anti-jamming ability of radar. It selects the polarization state of the transmitting or receiving antenna according to the difference between the polarization state of the radar target signal and the interference signal, so that the output sig...
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