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Spacing modulating method for microwave transmitted by multimode horn antenna

A horn antenna, spatial modulation technology, applied in the modulation carrier system, phase modulation carrier system, digital transmission system and other directions, can solve the problem of not solving the spatial modulation and so on

Inactive Publication Date: 2011-03-30
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it does not solve the spatial modulation problem of out-of-phase center multi-antenna transmission

Method used

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  • Spacing modulating method for microwave transmitted by multimode horn antenna
  • Spacing modulating method for microwave transmitted by multimode horn antenna
  • Spacing modulating method for microwave transmitted by multimode horn antenna

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] Embodiment 1: Using the modulated signal of the present invention to transmit code information

[0094] Now assume that the signal vector composed of six equivalent baseband orthogonal components in three time slots of the nth frame is

[0095] S(n)=[X(1,n) Y(1,n) X(2,n) Y(2,n) X(3,n) Y(3,n)] T , the antenna pattern function vector is H=[|F 1 |cosθ|F 1 |sinθ F 2 f 3 ] T , the modulation matrix to be designed is A(n), and the relationship of the signal vector satisfies:

[0096] S(n)=A(n)H (27)

[0097] The differential transformation relationship is: A ( n ) = B a n A ( n - 1 ) - - - ( 28 )

[0098] A ( 1 ) = ...

Embodiment 2

[0108] Embodiment 2: Use the modulated signal of the present invention for direction finding and tracking

[0109] If the transmitting source of the present invention is used to transmit the code information, the cooperative target receives it with a single antenna, and the measured direction information is transmitted back through the reverse link, so that the tracking of the moving target can be realized. If the target is a passive reflector, the reflected radio signal contains the direction information of the target relative to the transmitter, and the receiver can directly estimate the target direction from the reflected signal by distinguishing the target signal and the interference signal to realize target detection. Therefore, the following will only illustrate how to estimate the azimuth and elevation angles from the received signals.

[0110] Due to the adoption of the special signal space in the present invention, the received signal carrier phase lag φ satisfies:

...

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Abstract

The invention discloses a modulator approach of microwave space for the transmission of multi-mode horn antenna, belonging to the modulator approach of microwave space. The modulator approach can transmit three slot signals in one frame, and modulates the directional graph parameter(F<1>, F<2>, F<3>) of the antenna making use of the vector sum or vector differences of the three slot signals, realizing the space modulating of the azimuthal angle and elevation information, achieving the goal of transmitting different modulating signals on different directions. The QPSK communication informationtransmission can be realized using the approach, the signal direction corresponding to the transmitter is also can be determined. It is a new transmitting source of communication tracking, navigationguidance, and radar detection.

Description

1. Technical field [0001] The present invention relates to the system of radio communication radar and tracking system and the design of emission source, in particular to the basic method of how to modulate direction information into microwave signals so that different directions can emit different modulated signals. 2. Background technology [0002] Transmitting signal design has always been an important issue in radar detection, microwave communication and tracking, microwave remote sensing, and radio navigation. However, most system designs focus on optimizing the time-domain transmit waveform or antenna pattern characteristics. Except for special navigation systems, the transmitted signals of other systems are consistent within the antenna beam and do not contain direction information. To transmit different signals in different directions within the beam involves the modulation concept of spatial information or direction information on signals, that is, spatial modulati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/20H04L27/227
Inventor 宋茂忠洪涛周洋
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS