Virtual antenna array-based Doppler spread compensator and virtual antenna array-based Doppler spread compensation method

A Doppler extension and antenna array technology, applied in the field of Doppler extension compensator and compensation, can solve the problems of pilot sequence occupied bandwidth, reduce effective data transmission rate, single frequency to eliminate Doppler extension, etc. Effectiveness and reliability, best reception results

Inactive Publication Date: 2012-01-25
TSINGHUA UNIV
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Problems solved by technology

But AFC cannot use a single frequency to eliminate the Doppler spread caused by multipath time-varying, because different fading paths have different Doppler

Method used

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  • Virtual antenna array-based Doppler spread compensator and virtual antenna array-based Doppler spread compensation method
  • Virtual antenna array-based Doppler spread compensator and virtual antenna array-based Doppler spread compensation method
  • Virtual antenna array-based Doppler spread compensator and virtual antenna array-based Doppler spread compensation method

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Embodiment Construction

[0073] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0074] It should be noted that, in addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first", "second" and "third" may explicitly or implicitly include one or more of these features. Further, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0075] figure 1 is a schematic bl...

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Abstract

The invention discloses a virtual antenna array-based Doppler spread compensator and a virtual antenna array-based Doppler spread compensation method. The virtual antenna array-based Doppler spread compensator comprises N k-dimensional antenna arrays, a speed-providing unit, a timing unit, N interpolation units, a receiving unit, a transmission unit and N extrapolation units; the N k-dimensional antenna arrays are used for receiving and transmitting first signals; the speed-providing unit is used for constantly providing the flight speed v of a plane; the timing unit is used for constantly providing the flight time t of the plane; the N interpolation units are used for obtaining N second signals according to the positions of N virtual receiving antennas in the N k-dimensional antenna arrays and the least mean square error algorithm; the receiving unit is used for receiving the N second signals; the transmitting unit is used for providing signals to be transmitted; and the N extrapolation units are used for obtaining N third signals output to N virtual transmission antennas. The Doppler spread compensator can effectively compensate the Doppler shift and the frequency spread generated in air-to-ground aeronautical communication and obtain multi-antenna gain.

Description

technical field [0001] The invention relates to the technical field of aviation communication, in particular to a Doppler extension compensator and compensation method based on a virtual antenna array. Background technique [0002] With the continuous development of civil aviation, the number and traffic of civil aviation aircraft continue to increase, and the traffic of ground-air data communication is also increasing day by day. These data include air traffic control data (ATC), civil aviation management and operation data (AOC), and airborne mobile communication data (APC). The traditional air-ground aeronautical communication adopts a narrowband communication system, and its capacity has gradually reached saturation. In order to solve the capacity bottleneck of the ground-air data communication system caused by the continuous growth of ground-air data communication traffic, the ground-air data communication system is forced to have higher communication speed and communic...

Claims

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Application Information

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IPC IPC(8): H04B7/08H04L25/03H04L27/26
Inventor 张超回彦年
Owner TSINGHUA UNIV
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