High bit rate and low range resolution of low sidelobe phase coded signal design method

A phase-encoded signal and range resolution technology, applied in the radar field, can solve the problems of reducing range side lobes and not proposing a design method for phase-encoding signals, etc., to achieve the effect of reducing range side lobes, increasing difficulty, and large degrees of freedom

Active Publication Date: 2014-12-10
XIDIAN UNIV
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Problems solved by technology

However, for a wideband radar system, the signal processing bandwidth is fixed. At this time, it is impossible to reduce the range sidelobe by simply increasing the symbol length. At present, no phase encoding signal design method for this problem has been proposed.

Method used

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  • High bit rate and low range resolution of low sidelobe phase coded signal design method
  • High bit rate and low range resolution of low sidelobe phase coded signal design method
  • High bit rate and low range resolution of low sidelobe phase coded signal design method

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Embodiment Construction

[0027] refer to figure 1 , the implementation steps of the present invention are as follows:

[0028] Step 1. Set the symbol length of the phase encoded signal s after increasing the symbol transmission rate.

[0029] Given a phase-encoded signal s, set the symbol length of the phase-encoded signal s before increasing the symbol transmission rate to be N 1 , and increase the symbol transmission rate of the phase-encoded signal s by b times, b is an integer value, then the symbol length of the phase-encoded signal s after increasing the symbol transmission rate is: N s =b×N 1 .

[0030] Step 2, setting the main lobe width control amount M of the phase encoded signal s.

[0031] Set the main lobe control amount of the phase-encoded signal s: M=fix(δ×b), where δ is an empirical coefficient, usually valued at 0.75, b represents the multiple of the symbol transmission rate increase, and fix(·) represents the downward integer.

[0032] The value formula M=fix(δ×b) for determin...

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Abstract

The invention discloses a high bit rate and low range resolution of low sidelobe phase coded signal design method which mainly aims at solving the problems that the range sidelobe of a phase coded signal cannot be further reduced by the existing method and the existing phase coded signal is easy to identify. The implementation process of the high bit rate and low range resolution of low sidelobe phase coded signal design method comprises step 1, setting the code element length of a phase coded signal; step 2, setting a value of the main lobe width control quantity of the phase coded signal; step 3, building an objective function of the phase coded signal according to the code element length and the main lobe width control quantity of the phase coded signal; step 4, building constraint conditions of the phase coded signal; step 5, solving the objective function by an optimization algorithm under the constraint conditions to obtain an optimized phase coded signal. According to the high bit rate and low range resolution of low sidelobe phase coded signal design method, the range sidelobe of the phase coded signal can be further reduced, the identified difficulty of the phase coded signal can be increased, and the high bit rate and low range resolution of low sidelobe phase coded signal design method can be applied to the design of the phase coded signal.

Description

technical field [0001] The invention belongs to the technical field of radar, and specifically relates to a low-side-lobe phase encoding signal design method, which is used for reducing the distance side lobe of the phase encoding signal and increasing the difficulty of identifying the phase encoding signal. Background technique [0002] Pulse compression technology solves the contradiction between radar range and range resolution, and has been widely used in the radar field. The ideal pulse-compressed output is an impulse function, however, the actual pulse-compressed output contains a large number of distance sidelobes. The existence of range sidelobe affects the detection performance of radar. For example, high-amplitude range sidelobes can trigger false alarms, and range sidelobes from high-power target echoes can overwhelm low-power targets at nearby range cells. Therefore, measures must be taken to reduce the range sidelobe after pulse compression, and the peak sidel...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/02
CPCG01S7/02G01S7/2813G01S7/36G01S13/0209
Inventor 刘宏伟周生华雷欢臧会凯但晓东
Owner XIDIAN UNIV
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