CN110855341A - Integrated beam forming and signal modulation method based on digital programmable super surface - Google Patents

Integrated beam forming and signal modulation method based on digital programmable super surface Download PDF

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CN110855341A
CN110855341A CN201911069359.3A CN201911069359A CN110855341A CN 110855341 A CN110855341 A CN 110855341A CN 201911069359 A CN201911069359 A CN 201911069359A CN 110855341 A CN110855341 A CN 110855341A
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super surface
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CN110855341B (en
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万向
崔铁军
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Southeast University
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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Abstract

本发明公开了一种基于数字化可编程超表面的一体化波束赋形与信号调制方法，通过控制数字化可编程超表面的口面编码在空间上的分布，完成波束赋形，所述口面编码由数字化可编程超表面中所有超表面单元的不同状态组合构成；通过控制不同的口面编码在时间上的切换顺序，完成信号的调制。

Figure 201911069359

The invention discloses an integrated beam forming and signal modulation method based on a digital programmable metasurface. The beam forming is completed by controlling the spatial distribution of the oral code of the digital programmable metasurface. It is composed of different state combinations of all metasurface units in the digitally programmable metasurface; signal modulation is completed by controlling the switching sequence of different oral codes in time.

Figure 201911069359

Description

一种基于数字化可编程超表面的一体化波束赋形与信号调制 方法An Integrated Beamforming and Signal Modulation Based on Digital Programmable Metasurface method

技术领域technical field

本发明涉及信号调制技术领域，具体涉及一种基于数字化可编程超表面的一体化波束赋形与信号调制技方法。The invention relates to the technical field of signal modulation, in particular to an integrated beam forming and signal modulation technology method based on a digital programmable metasurface.

背景技术Background technique

在传统的无线电子系统中，信号的调制与电磁波的波束控制是由不同的模块完成的。一般来说，信号的调制在基带部分完成，而电磁波的波束控制在射频部分完成。In the traditional radio subsystem, the modulation of the signal and the beam steering of the electromagnetic wave are completed by different modules. Generally speaking, the modulation of the signal is done in the baseband part, and the beam control of the electromagnetic wave is done in the radio frequency part.

发明内容SUMMARY OF THE INVENTION

本发明的目的在于提供了一种基于数字化可编程超表面的一体化信号调制与波束控制技术，简化传统的通信架构并极大提升系统的灵活性。The purpose of the present invention is to provide an integrated signal modulation and beam control technology based on a digital programmable metasurface, which simplifies the traditional communication architecture and greatly improves the flexibility of the system.

技术方案：一种基于数字化可编程超表面的一体化波束赋形与信号调制方法，包括：Technical solution: an integrated beamforming and signal modulation method based on a digitally programmable metasurface, comprising:

通过控制数字化可编程超表面的口面编码在空间上的分布，完成波束赋形，所述口面编码由数字化可编程超表面中所有超表面单元的不同状态组合构成；By controlling the spatial distribution of the orofacial code of the digitally programmable metasurface, the beamforming is completed, and the orifice code is composed of different state combinations of all metasurface units in the digitally programmable metasurface;

通过控制不同的口面编码在时间上的切换顺序，完成信号的调制。By controlling the switching sequence of different face codes in time, the modulation of the signal is completed.

进一步的，所述数字化可编程超表面的口面编码的获取步骤包括：Further, the step of acquiring the oral code of the digitally programmable metasurface includes:

将数字化可编程超表面生成的远场定义为平面波，对远场进行傅里叶变换

Figure BDA0002260464220000011
得到数字化可编程超表面的口面场；Defining the far field generated by a digitally programmable metasurface as a plane wave and performing a Fourier transform on the far field
Figure BDA0002260464220000011
Obtain the oral field of digitally programmable metasurfaces;

将得到的数字化可编程超表面的口面场进行离散得到口面编码；Discrete the oral field of the digital programmable metasurface to obtain the oral encoding;

式中，

Figure BDA0002260464220000012
代表指定远场，
Figure BDA0002260464220000013
代表调制项，α代表幅度调制，代表相位调制。In the formula,
Figure BDA0002260464220000012
represents the specified far field,
Figure BDA0002260464220000013
represents the modulation term, α represents the amplitude modulation, stands for phase modulation.

进一步的，所述步骤2具体为：通过调整

Figure BDA0002260464220000015
的值对波束相位进行控制。Further, the step 2 is specifically: by adjusting
Figure BDA0002260464220000015
The value of , controls the beam phase.

进一步的，将数字化可编程超表面生成的远场定义为一个定向平面波：其波束相位由指定的值来控制，完成定向波束和波束的相位调制。Further, the far field generated by the digitally programmable metasurface is defined as a directional plane wave: Its beam phase is specified by The value of , completes the phase modulation of the directional beam and the beam.

进一步的，将数字化可编程超表面生成的远场定义为两个指向不同方向的平面波：

Figure BDA0002260464220000018
指定和
Figure BDA00022604642200000110
的值分别独立控制两个波束的相位，完成双定向波束和不同波束相位的独立调制。Further, the far-field generated by the digitally programmable metasurface is defined as two plane waves pointing in different directions:
Figure BDA0002260464220000018
specify and
Figure BDA00022604642200000110
The value of , independently controls the phases of the two beams, and completes the independent modulation of dual-directional beams and different beam phases.

有益效果：本发明与现有技术相比，本发明通过控制数字化可编程超表面的口面编码在空间上的分布和时间上的切换顺序，实现了一体化的波束赋形与信号调制，简化传统的通信架构并极大提升系统的灵活性，促进当今信息化系统的多功能化、集成化以及智能化发展，具有革新性的应用前景。Beneficial effect: Compared with the prior art, the present invention realizes the integrated beamforming and signal modulation by controlling the spatial distribution and temporal switching sequence of the face coding of the digital programmable metasurface, simplifying the The traditional communication architecture greatly improves the flexibility of the system, and promotes the multi-functional, integrated and intelligent development of today's information systems, and has innovative application prospects.

附图说明Description of drawings

图1数字化可编程超表面示意图；Figure 1 is a schematic diagram of a digitally programmable metasurface;

图2为实施例1的定向波束和波束的相位调制示意图；2 is a schematic diagram of the directional beam and the phase modulation of the beam according to Embodiment 1;

图3为实施例2的双定向波束和不同波束相位的独立调制。FIG. 3 shows dual directional beams and independent modulation of different beam phases according to Embodiment 2. FIG.

具体实施方式Detailed ways

下面结合附图和实施例进一步阐述本发明。The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

本发明提出了一种基于数字化可编程超表面的一体化信号调制与波束控制技术。具体来说，通过设计数字化超表面的口面编码，实现波束控制；同时，将不同的口面编码在时域进行切换，可以实现信号的调制。基于本发明公开的技术，可以实现信号调制与波束控制的一体化，从而简化传统的通信架构并极大提升系统的灵活性，具有革新性的应用前景。The invention proposes an integrated signal modulation and beam control technology based on a digital programmable metasurface. Specifically, by designing the orofacial coding of the digital metasurface, beam steering can be achieved; at the same time, the modulation of the signal can be achieved by switching between different orifice codes in the time domain. Based on the technology disclosed in the present invention, the integration of signal modulation and beam control can be realized, thereby simplifying the traditional communication architecture, greatly improving the flexibility of the system, and having innovative application prospects.

图1是可编程超表面示意图，其中每个小方块代表一个超表面单元，不同的颜色代表单元的不同状态，所有超表面单元的不同状态组合构成了超表面单元的口面编码，通过设计编码的空间分布和时间切换顺序即可实现一体化的信号调制与波束控制。Figure 1 is a schematic diagram of a programmable metasurface, in which each small square represents a metasurface unit, and different colors represent different states of the unit. The combination of different states of all metasurface units constitutes the face code of the metasurface unit, which is encoded by design. The spatial distribution and time switching sequence can realize integrated signal modulation and beam steering.

根据惠更斯-菲涅尔衍射定理，一个口面的远场可以由口面近场

Figure BDA0002260464220000022
的逆傅里叶变换得到。由于数字化可编程超表面的口面场是数字离散的，因此可以将口面场记为U(mΔx，nΔy，kΔt)，其中，mΔx和nΔy代表单元在口面上的坐标，kΔt代表口面编码所处的时刻。为了简化，进一步将口面场记为U(m，n，k)，并将其对应的远场记为
Figure BDA0002260464220000023
若预先指定远场，则其口面场可以由远场的傅里叶变换
Figure BDA0002260464220000024
得到，其中
Figure BDA0002260464220000025
代表傅里叶变换。将口面场进行离散就得到远场所对应的口面编码。另一方面，在指定远场的表达式上增加一项调制项
Figure BDA0002260464220000026
其中，α代表幅度调制，代表相位调制，则此时的远场所对应的口面编码由
Figure BDA0002260464220000028
得到。这两种口面编码所对应的远场方向图一样，但其幅度和相位不同，如果在时间上按照一定的时序对两种编码进行切换，则构成了信号调制的基础。综上所示，通过对口面编码的空间分布和时间切换顺序进行设计，就可以实现一体化的波束赋形与信号调制。According to the Huygens-Fresnel diffraction theorem, the far field of a mouth oral near field
Figure BDA0002260464220000022
The inverse Fourier transform of . Since the oral field of the digital programmable metasurface is digitally discrete, the oral field can be denoted as U(mΔx, nΔy, kΔt), where mΔx and nΔy represent the coordinates of the unit on the oral surface, and kΔt represents the oral encoding at the moment. For simplicity, the oral field is further denoted as U(m, n, k), and its corresponding far field is denoted as
Figure BDA0002260464220000023
If the far field is specified in advance, its oral field can be transformed by the Fourier transform of the far field
Figure BDA0002260464220000024
get, where
Figure BDA0002260464220000025
stands for Fourier Transform. By discretizing the oral field, the oral encoding corresponding to the far field can be obtained. On the other hand, a modulation term is added to the expression specifying the far field
Figure BDA0002260464220000026
where α represents the amplitude modulation, represents phase modulation, then the oral encoding corresponding to the far field at this time is given by
Figure BDA0002260464220000028
get. The far-field patterns corresponding to these two oral codes are the same, but their amplitude and phase are different. If the two codes are switched according to a certain time sequence in time, it constitutes the basis of signal modulation. To sum up, by designing the spatial distribution and temporal switching sequence of the oral coding, integrated beamforming and signal modulation can be realized.

实施例1：Example 1:

单波束与信号调制Single Beam and Signal Modulation

本实施例利用数字化可编程超表面同时实现了定向波束和波束的相位调制。定义超表面的远场函数为一个定向平面波：

Figure BDA0002260464220000029
其波束相位可由指定
Figure BDA00022604642200000210
的值来控制。In this embodiment, the directional beam and the phase modulation of the beam are simultaneously realized by using a digitally programmable metasurface. Define the far-field function of the metasurface as a directional plane wave:
Figure BDA0002260464220000029
Its beam phase can be specified by
Figure BDA00022604642200000210
value to control.

令波束指向为(θ＝45°,

Figure BDA00022604642200000211
)；同时令
Figure BDA00022604642200000212
以π/2的步进从0增加到3π/2。根据理论部分的介绍可以算出四种情况对应的口面编码，图2a给出了计算编码结果。当
Figure BDA00022604642200000213
时，利用口面编码计算的远场如图2d所示，亮点代表超表面生成的远场主波束，验证了编码的有效性。图2g是当
Figure BDA00022604642200000214
以π/2的步进从0增加到3π/2时，四种情况下的远场测试结果，从测试结果可以看出，尽管
Figure BDA00022604642200000215
的值不同，但远场图基本保持一致。图2j是四种情况下测试的主波束相位，从图中可以看出，主波束的相位与
Figure BDA00022604642200000216
成线性关系，与预期结果一致。Let the beam point be (θ=45°,
Figure BDA00022604642200000211
); at the same time
Figure BDA00022604642200000212
Increments from 0 to 3π/2 in steps of π/2. According to the introduction of the theoretical part, the oral encoding corresponding to the four cases can be calculated, and the calculation encoding result is shown in Figure 2a. when
Figure BDA00022604642200000213
When , the far-field calculated using the oral coding is shown in Fig. 2d, and the bright spots represent the far-field main beam generated by the metasurface, which verifies the validity of the coding. Figure 2g is when
Figure BDA00022604642200000214
When increasing from 0 to 3π/2 in steps of π/2, the far-field test results of the four cases can be seen from the test results, although
Figure BDA00022604642200000215
The values of , but the far-field images are basically the same. Figure 2j is the phase of the main beam tested in the four cases. It can be seen from the figure that the phase of the main beam is the same as that of the main beam.
Figure BDA00022604642200000216
A linear relationship is consistent with the expected results.

令波束指向为(θ＝0°,

Figure BDA0002260464220000031
)，且令
Figure BDA0002260464220000032
以π/2的步进从0增加到3π/2。此时超表面的口面编码如图2b所示；当
Figure BDA0002260464220000033
时，利用口面编码计算的远场如图2e所示，亮点代表超表面生成的远场主波束，验证了编码的有效性。图2h是当
Figure BDA0002260464220000034
以π/2的步进从0增加到3π/2 时，四种情况下的远场测试结果，从测试结果可以看出，尽管
Figure BDA0002260464220000035
的值不同，但远场图基本保持一致。图2k是四种情况下测试的主波束相位，从图中可以看出，主波束的相位与
Figure BDA0002260464220000036
成线性关系，与预期结果一致。Let the beam point be (θ=0°,
Figure BDA0002260464220000031
), and let
Figure BDA0002260464220000032
Increments from 0 to 3π/2 in steps of π/2. At this time, the face encoding of the metasurface is shown in Fig. 2b; when
Figure BDA0002260464220000033
When , the far-field calculated using the oral coding is shown in Fig. 2e, and the bright spot represents the far-field main beam generated by the metasurface, which verifies the validity of the coding. Figure 2h is when
Figure BDA0002260464220000034
When increasing from 0 to 3π/2 in steps of π/2, the far-field test results of the four cases can be seen from the test results, although
Figure BDA0002260464220000035
The values of , but the far-field images are basically the same. Figure 2k shows the phase of the main beam tested in four cases. It can be seen from the figure that the phase of the main beam is the same as that of the main beam.
Figure BDA0002260464220000036
A linear relationship is consistent with the expected results.

令波束指向为(θ＝-45°,

Figure BDA0002260464220000037
)，且令
Figure BDA0002260464220000038
以π/2的步进从0增加到3π/2。此时超表面的口面编码如图2c所示；当时，利用口面编码计算的远场如图2f所示，亮点代表超表面生成的远场主波束，验证了编码的有效性。图2i是当
Figure BDA00022604642200000310
以π/2的步进从0增加到3π/2 时，四种情况下的远场测试结果，从测试结果可以看出，尽管
Figure BDA00022604642200000311
的值不同，但远场图基本保持一致。图2l是四种情况下测试的主波束相位，从图中可以看出，主波束的相位与
Figure BDA00022604642200000312
成线性关系，与预期结果一致。Let the beam point be (θ=-45°,
Figure BDA0002260464220000037
), and let
Figure BDA0002260464220000038
Increments from 0 to 3π/2 in steps of π/2. At this time, the face encoding of the metasurface is shown in Fig. 2c; when When , the far-field calculated using the oral coding is shown in Fig. 2f, and the bright spots represent the far-field main beam generated by the metasurface, which verifies the validity of the coding. Figure 2i is when
Figure BDA00022604642200000310
When increasing from 0 to 3π/2 in steps of π/2, the far-field test results of the four cases can be seen from the test results, although
Figure BDA00022604642200000311
The values of , but the far-field images are basically the same. Figure 21 shows the phase of the main beam tested in the four cases. It can be seen from the figure that the phase of the main beam is the same as that of the main beam.
Figure BDA00022604642200000312
A linear relationship is consistent with the expected results.

实施例2：Example 2:

双波束与独立信号调制Dual beam with independent signal modulation

本实施例利用数字化可编程超表面同时实现了双定向波束和不同波束相位的独立调制。定义超表面生成的远场为两个指向不同方向的平面波：

Figure BDA00022604642200000313
从远场表达式可以看出，两个波束的相位可以由指定和
Figure BDA00022604642200000315
的值来独立控制。In this embodiment, dual-directional beams and independent modulation of different beam phases are simultaneously realized by using a digitally programmable metasurface. Define the far field generated by the metasurface as two plane waves pointing in different directions:
Figure BDA00022604642200000313
From the far-field expression, it can be seen that the phase of the two beams can be specified by and
Figure BDA00022604642200000315
value for independent control.

令波束指向分别为：(θ1＝10°,

Figure BDA00022604642200000316
),(θ2＝-30°,
Figure BDA00022604642200000317
)，并令
Figure BDA00022604642200000318
和
Figure BDA00022604642200000319
均为零，图3a给出了根据口面编码计算的远场方向图。计算显示两个主瓣指向给定的方向，验证的超表面编码的有效性。Let the beam directions be respectively: (θ 1 =10°,
Figure BDA00022604642200000316
),(θ 2 =-30°,
Figure BDA00022604642200000317
), and let
Figure BDA00022604642200000318
and
Figure BDA00022604642200000319
are all zero, and Figure 3a presents the far-field pattern calculated from the orofacial encoding. The calculations show that the two main lobes point in the given directions, verifying the validity of the metasurface encoding.

令波束指向分别为：(θ1＝33°,

Figure BDA00022604642200000320
),(θ2＝29°,
Figure BDA00022604642200000321
)，并令
Figure BDA00022604642200000322
和
Figure BDA00022604642200000323
均为零，图3b给出了根据口面编码计算的远场方向图。计算显示两个主瓣指向给定的方向，验证的超表面编码的有效性。Let the beam directions be: (θ 1 =33°,
Figure BDA00022604642200000320
),(θ 2 =29°,
Figure BDA00022604642200000321
), and let
Figure BDA00022604642200000322
and
Figure BDA00022604642200000323
are all zero, and Figure 3b presents the far-field pattern calculated from the orofacial encoding. The calculations show that the two main lobes point in the given directions, verifying the validity of the metasurface encoding.

令波束指向分别为：(θ1＝25°,

Figure BDA00022604642200000324
),(θ2＝28°,
Figure BDA00022604642200000325
)，并令和
Figure BDA00022604642200000327
均为零，图3c给出了根据口面编码计算的远场方向图。计算显示两个主瓣指向给定的方向，验证的超表面编码的有效性。Let the beam directions be: (θ 1 =25°,
Figure BDA00022604642200000324
),(θ 2 =28°,
Figure BDA00022604642200000325
), and let and
Figure BDA00022604642200000327
are all zero, and Figure 3c presents the far-field pattern calculated from the orofacial encoding. The calculations show that the two main lobes point in the given directions, verifying the validity of the metasurface encoding.

令波束指向分别为：(θ1＝43°,

Figure BDA00022604642200000328
),(θ2＝30°,
Figure BDA00022604642200000329
)，并令
Figure BDA00022604642200000330
和
Figure BDA00022604642200000331
均为零，图3d给出了根据口面编码计算的远场方向图。计算显示两个主瓣指向给定的方向，验证的超表面编码的有效性。Let the beam directions be respectively: (θ 1 =43°,
Figure BDA00022604642200000328
),(θ 2 =30°,
Figure BDA00022604642200000329
), and let
Figure BDA00022604642200000330
and
Figure BDA00022604642200000331
are all zero, and Figure 3d presents the far-field pattern calculated from the orofacial encoding. The calculations show that the two main lobes point in the given directions, verifying the validity of the metasurface encoding.

另一方面，为了验证数字化超表面对不同波束的相位的独立调控能力，针对图3a中的两个波束，分别指定了不同的相位值，并测试其远场方向图和相位。On the other hand, in order to verify the ability of the digital metasurface to independently control the phases of different beams, different phase values were specified for the two beams in Figure 3a, and their far-field patterns and phases were tested.

首先，令

Figure BDA00022604642200000332
Figure BDA00022604642200000333
以π/2的步进从0增加到3π/2。图3e给出了四种情况下的远场测试结果，从测试结果可以看出，尽管波束的相位不同，但方向图基本保持一致。图3i 是对应的远场相位测试结果，从测试结果可以看出第一个波束的相位保持固定，而第二个波束的相位步进为π/2，与预期的结果一致。First, let
Figure BDA00022604642200000332
Figure BDA00022604642200000333
Increments from 0 to 3π/2 in steps of π/2. Figure 3e shows the far-field test results for the four cases. From the test results, it can be seen that although the phases of the beams are different, the patterns are basically the same. Figure 3i shows the corresponding far-field phase test results. From the test results, it can be seen that the phase of the first beam remains fixed, while the phase step of the second beam is π/2, which is consistent with the expected results.

令

Figure BDA0002260464220000041
Figure BDA0002260464220000042
以π/2的步进从0增加到3π/2。图3f给出了四种情况下的远场测试结果，从测试结果可以看出，尽管波束的相位不同，但方向图基本保持一致。图3j是对应的远场相位测试结果，从测试结果可以看出第一个波束的相位增加了π/2且保持固定，而第二个波束的相位步进为π/2，与预期的结果一致。make
Figure BDA0002260464220000041
Figure BDA0002260464220000042
Increments from 0 to 3π/2 in steps of π/2. Figure 3f shows the far-field test results for the four cases. From the test results, it can be seen that although the phases of the beams are different, the patterns are basically the same. Figure 3j shows the corresponding far-field phase test results. From the test results, it can be seen that the phase of the first beam increases by π/2 and remains fixed, while the phase step of the second beam is π/2, which is consistent with the expected result. Consistent.

令

Figure BDA0002260464220000043
Figure BDA0002260464220000044
以π/2的步进从0增加到3π/2。图3g给出了四种情况下的远场测试结果，从测试结果可以看出，尽管波束的相位不同，但方向图基本保持一致。图3k是对应的远场相位测试结果，从测试结果可以看出第一个波束的相位增加了π/2且保持固定，而第二个波束的相位步进为π/2，与预期的结果一致。make
Figure BDA0002260464220000043
Figure BDA0002260464220000044
Increments from 0 to 3π/2 in steps of π/2. Figure 3g shows the far-field test results in the four cases. From the test results, it can be seen that although the phases of the beams are different, the patterns are basically the same. Figure 3k shows the corresponding far-field phase test results. From the test results, it can be seen that the phase of the first beam increases by π/2 and remains fixed, while the phase step of the second beam is π/2, which is consistent with the expected result. Consistent.

令

Figure BDA0002260464220000045
Figure BDA0002260464220000046
以π/2的步进从0增加到3π/2。图3h给出了四种情况下的远场测试结果，从测试结果可以看出，尽管波束的相位不同，但方向图基本保持一致。图3l是对应的远场相位测试结果，从测试结果可以看出第一个波束的相位增加了π/2且保持固定，而第二个波束的相位步进为π/2，与预期的结果一致。make
Figure BDA0002260464220000045
Figure BDA0002260464220000046
Increments from 0 to 3π/2 in steps of π/2. Figure 3h shows the far-field test results for the four cases. From the test results, it can be seen that although the phases of the beams are different, the patterns are basically the same. Figure 31 shows the corresponding far-field phase test results. From the test results, it can be seen that the phase of the first beam increases by π/2 and remains fixed, while the phase step of the second beam is π/2, which is consistent with the expected result. Consistent.

Claims (5)

1. An integrated beam forming and signal modulation method based on a digital programmable super surface is characterized in that: the method comprises the following steps:
beam forming is completed by controlling the distribution of the oral surface code of the digital programmable super surface on the space, wherein the oral surface code is formed by combining different states of all super surface units in the digital programmable super surface;
and the modulation of the signal is completed by controlling the switching sequence of different face codes on time.
2. The integrated beamforming and signal modulation method based on the digital programmable super surface according to claim 1, wherein: the acquisition step of the orofacial code of the digital programmable super surface comprises the following steps:
defining the far field generated by the digital programmable super surface as a plane wave, and carrying out Fourier transform on the far field
Figure FDA0002260464210000011
Obtaining a mouth-face field of the digital programmable super surface;
dispersing the obtained oral surface field of the digital programmable super surface to obtain oral surface codes;
in the formula (I), the compound is shown in the specification,
Figure FDA0002260464210000012
representing the designated far-field,
Figure FDA0002260464210000013
representing the modulation terms, α representing the amplitude modulation,
Figure FDA0002260464210000014
representing phase modulation.
3. The integrated beamforming and signal modulation method based on the digital programmable super surface according to claim 2, wherein: the step 2 specifically comprises the following steps: by adjusting
Figure FDA0002260464210000015
The value of (c) controls the beam phase.
4. The integrated beamforming and signal modulation method based on the digital programmable super surface according to claim 3, wherein: defining the far field generated by the digital programmable super surface as a directional plane wave:
Figure FDA0002260464210000016
the beam phase of which is specified
Figure FDA0002260464210000017
And the phase modulation of the directional beam and the beam is completed.
5. The integrated beamforming and signal modulation method based on the digital programmable super surface according to claim 3, wherein: the far field generated by the digitally programmable super surface is defined as two plane waves pointing in different directions:specifying
Figure FDA0002260464210000019
And
Figure FDA00022604642100000110
the values of (a) and (b) control the phases of the two beams independently, respectively, to accomplish independent modulation of the dual directional beams and the phases of the different beams.
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