CN108923852A - A kind of mixing FSO/RF link trunking transmission method, device and source node - Google Patents

A kind of mixing FSO/RF link trunking transmission method, device and source node Download PDF

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CN108923852A
CN108923852A CN201810769666.1A CN201810769666A CN108923852A CN 108923852 A CN108923852 A CN 108923852A CN 201810769666 A CN201810769666 A CN 201810769666A CN 108923852 A CN108923852 A CN 108923852A
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fso
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杨亮
刘欣欣
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Guangdong University of Technology
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/29Repeaters
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50Transmitters
    • H04B10/564Power control
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/14Relay systems
    • H04B7/15Active relay systems
    • H04B7/155Ground-based stations
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14Spectrum sharing arrangements between different networks

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本申请公开了一种混合FSO/RF链路中继传输方法、装置及源节点,包括生成多个同时频的传输信号;对每个传输信号进行功率分配;将功率分配后的每个传输信号叠加为混合信号;将混合信号转换为光混合信号;将光混合信号发送至中继节点;本发明生成多个同时频的传输信号,对多个同时频的传输信号进行功率分配,使每个传输信号的功率均不相同,从而实现在保证每个传输信号完整的情况下,进行叠加,得到混合信号,从而实现多个传输信号以混合信号的形式利用同一时频资源在同一信道中进行传输,在目的节点接收到射频形式的射频混合信号后,对射频混合信号中的干扰信号进行消除,得到与目的节点对应的传输信号,完成混合FSO/RF链路中继传输过程,提高频谱利用率和传输信号吞吐量。

This application discloses a hybrid FSO/RF link relay transmission method, device and source node, including generating multiple simultaneous frequency transmission signals; power allocation for each transmission signal; power allocation for each transmission signal Superimposed into a mixed signal; convert the mixed signal into an optical mixed signal; send the optical mixed signal to the relay node; the present invention generates multiple simultaneous frequency transmission signals, and performs power distribution on multiple simultaneous frequency transmission signals, so that each The power of the transmission signals is different, so as to ensure the integrity of each transmission signal, superimpose to obtain a mixed signal, so that multiple transmission signals can be transmitted in the same channel using the same time-frequency resource in the form of a mixed signal , after the destination node receives the radio frequency mixed signal in the form of radio frequency, the interference signal in the radio frequency mixed signal is eliminated, and the transmission signal corresponding to the destination node is obtained, and the hybrid FSO/RF link relay transmission process is completed, and the spectrum utilization rate is improved and transmission signal throughput.

Description

一种混合FSO/RF链路中继传输方法、装置及源节点A hybrid FSO/RF link relay transmission method, device and source node

技术领域technical field

本发明涉及无线通信领域,特别涉及一种混合FSO/RF链路中继传输方法、装置及源节点。The present invention relates to the field of wireless communication, in particular to a hybrid FSO/RF link relay transmission method, device and source node.

背景技术Background technique

现有的基于OMA(正交多址接入)的混合RF/FSO(射频/自由空间光通信)链路的中继传输系统,其基本思路是在划分正交的时频资源的基础上,根据传输环境的不同特点,在高移动性的基站与移动台链路采取传统的RF传输方式,在低移动性的基站与中继链路采取能提供更高的速率和光学带宽的FSO传输方式,从而能够充分利用这两种传输方式的优点,实现高速高效的信息传输。The existing relay transmission system based on OMA (Orthogonal Multiple Access) hybrid RF/FSO (Radio Frequency/Free Space Optical Communication) link, its basic idea is to divide the orthogonal time-frequency resources on the basis of According to the different characteristics of the transmission environment, the traditional RF transmission method is adopted for the link between the base station and the mobile station with high mobility, and the FSO transmission method that can provide higher speed and optical bandwidth is adopted for the link between the base station and the relay with low mobility , so that the advantages of these two transmission methods can be fully utilized to realize high-speed and efficient information transmission.

但是,现有的混合RF/FSO系统基于OMA的射频传输经常受频谱资源紧缺的影响;随着移动新业务的发展,无线网络资源的需求呈爆炸式增长,上述的问题将会越来越严峻。However, the OMA-based radio frequency transmission of the existing hybrid RF/FSO system is often affected by the shortage of spectrum resources; with the development of new mobile services, the demand for wireless network resources is increasing explosively, and the above problems will become more and more serious .

因此,需要提出一种能够大幅提高频谱利用率,能够显著缓解当今多业务需求环境下的频谱资源紧缺的情况的技术。Therefore, it is necessary to propose a technology that can greatly improve spectrum utilization and can significantly alleviate the shortage of spectrum resources in today's multi-service demand environment.

发明内容Contents of the invention

有鉴于此,本发明的目的在于提供一种混合FSO/RF链路中继传输方法、装置及源节点,能够提高频谱利用率和传输信号吞吐量,缓解频谱资源紧缺的情况。其具体方案如下:In view of this, the purpose of the present invention is to provide a hybrid FSO/RF link relay transmission method, device and source node, which can improve spectrum utilization and transmission signal throughput, and alleviate the shortage of spectrum resources. The specific plan is as follows:

一种混合FSO/RF链路中继传输方法,应用在源节点上,包括:A hybrid FSO/RF link relay transmission method applied to a source node, comprising:

生成多个同时频的传输信号;Generate multiple simultaneous frequency transmission signals;

对每个传输信号进行功率分配,使每个传输信号的功率均不相同;Power allocation is performed on each transmission signal so that the power of each transmission signal is different;

将功率分配后的每个传输信号叠加为混合信号;Superimposing each transmission signal after power distribution into a mixed signal;

将所述混合信号转换为光信号,得到光混合信号;converting the mixed signal into an optical signal to obtain an optical mixed signal;

将所述光混合信号通过FSO信道发送至中继节点,以使所述中继节点将所述光混合信号转换为射频信号,得到射频混合信号,将所述射频混合信号通过RF信道发送至目的节点;Sending the optical mixed signal to a relay node through an FSO channel, so that the relay node converts the optical mixed signal into a radio frequency signal to obtain a radio frequency mixed signal, and sends the radio frequency mixed signal to a destination through an RF channel node;

其中,所述目的节点接收所述射频混合信号,消除所述射频混合信号中的干扰信号,得到与所述目的节点对应的传输信号。Wherein, the destination node receives the radio frequency mixed signal, eliminates an interference signal in the radio frequency mixed signal, and obtains a transmission signal corresponding to the destination node.

可选的,所述生成多个同时频的传输信号的过程,包括:Optionally, the process of generating multiple simultaneous-frequency transmission signals includes:

生成多个待传输的初始传输信号,对多个初始传输信号进行信道编码,得到多个同信道的编码传输信号;generating multiple initial transmission signals to be transmitted, performing channel coding on the multiple initial transmission signals, and obtaining multiple coded transmission signals of the same channel;

对多个编码传输信号进行信号调制,得到多个同时频的传输信号。Signal modulation is performed on multiple coded transmission signals to obtain multiple simultaneous frequency transmission signals.

可选的,所述FSO信道和RF信道分别服从M衰落分布和瑞利衰落分布。Optionally, the FSO channel and the RF channel follow the M fading distribution and the Rayleigh fading distribution respectively.

可选的,所述对每个传输信号进行功率分配,使每个传输信号的功率均不相同的过程包括:Optionally, the process of allocating power to each transmission signal so that the power of each transmission signal is different includes:

利用非正交多址接入技术对每个传输信号进行功率分配,使每个传输信号的功率均不相同。The non-orthogonal multiple access technology is used to allocate power to each transmission signal, so that the power of each transmission signal is different.

本发明还公开了一种源节点,包括:The present invention also discloses a source node, including:

生成模块,用于生成多个同时频的传输信号;A generating module, configured to generate multiple simultaneous frequency transmission signals;

功率分配模块,用于对每个传输信号进行功率分配,使每个传输信号的功率均不相同;A power allocation module, configured to allocate power to each transmission signal, so that the power of each transmission signal is different;

叠加模块,用于将功率分配后的每个传输信号叠加为所述混合信号;a superposition module, configured to superimpose each transmission signal after power distribution into the mixed signal;

光电转换模块,用于将所述混合信号转换为光信号,得到所述光混合信号;a photoelectric conversion module, configured to convert the mixed signal into an optical signal to obtain the optical mixed signal;

发送模块,用于将所述光混合信号通过FSO信道发送至中继节点。A sending module, configured to send the optical mixed signal to the relay node through the FSO channel.

可选的,所述生成模块,包括:Optionally, the generating module includes:

生成单元,用于生成多个待传输的初始传输信号;a generating unit, configured to generate a plurality of initial transmission signals to be transmitted;

信道编码单元,用于对多个初始传输信号进行信道编码,得到多个同信道的编码传输信号;A channel coding unit, configured to perform channel coding on a plurality of initial transmission signals to obtain a plurality of coded transmission signals of the same channel;

调制单元,用于对多个编码传输信号进行信号调制,得到多个同时频的传输信号。The modulation unit is used to perform signal modulation on multiple coded transmission signals to obtain multiple simultaneous frequency transmission signals.

可选的,所述功率分配模块,具体用于利用非正交多址接入技术对每个传输信号进行功率分配,使每个传输信号的功率均不相同。Optionally, the power allocation module is specifically configured to perform power allocation on each transmission signal by using a non-orthogonal multiple access technology, so that the power of each transmission signal is different.

本发明还公开了一种混合FSO/RF链路中继传输装置,包括如前述的源节点、中继节点和目的节点;The present invention also discloses a hybrid FSO/RF link relay transmission device, including the aforementioned source node, relay node and destination node;

所述中继节点,用于通过FSO信道接收光混合信号,将所述光混合信号转换为射频信号,得到射频混合信号,将所述射频混合信号通过RF信道发送至所述目的节点;The relay node is configured to receive an optical mixed signal through an FSO channel, convert the optical mixed signal into a radio frequency signal to obtain a radio frequency mixed signal, and send the radio frequency mixed signal to the destination node through an RF channel;

所述目的节点,用于通过所述RF信道接收所述射频混合信号,消除所述射频混合信号中的干扰信号,得到与所述目的节点对应的传输信号。The destination node is configured to receive the radio frequency mixed signal through the RF channel, eliminate interference signals in the radio frequency mixed signal, and obtain a transmission signal corresponding to the destination node.

可选的,所述中继节点,包括:Optionally, the relay node includes:

光电探测器,用于通过所述FSO信道接收所述光混合信号,并将所述光混合信号转换为射频信号,得到初始射频混合信号;a photodetector, configured to receive the optical mixed signal through the FSO channel, and convert the optical mixed signal into a radio frequency signal to obtain an initial radio frequency mixed signal;

AF放大器,用于对所述初始射频混合信号进行放大,得到所述射频混合信号;An AF amplifier, configured to amplify the initial radio frequency mixed signal to obtain the radio frequency mixed signal;

RF信号发射器,用于将所述射频混合信号通过所述RF信道发送至所述目的节点。An RF signal transmitter, configured to send the radio frequency mixed signal to the destination node through the RF channel.

可选的,所述目的节点,包括:Optionally, the destination node includes:

信号接收器,用于通过所述RF信道接收所述射频混合信号;a signal receiver for receiving the radio frequency mixed signal through the RF channel;

干扰消除模块,用于消除所述射频混合信号中的所述干扰信号,得到与所述目的节点对应的传输信号,所述干扰信号包括未与所述目的节点对应的传输信号。An interference elimination module, configured to eliminate the interference signal in the radio frequency mixed signal to obtain a transmission signal corresponding to the destination node, where the interference signal includes a transmission signal not corresponding to the destination node.

本发明中,混合FSO/RF链路中继传输方法,包括:生成多个同时频的传输信号;对每个传输信号进行功率分配,使每个传输信号的功率均不相同;将功率分配后的每个传输信号叠加为混合信号;将混合信号转换为光信号,得到光混合信号;将光混合信号通过FSO信道发送至中继节点,以使中继节点将光混合信号转换为射频信号,得到射频混合信号,将射频混合信号通过RF信道发送至目的节点;其中,目的节点接收射频混合信号,消除射频混合信号中的干扰信号,得到与目的节点对应的传输信号。In the present invention, the hybrid FSO/RF link relay transmission method includes: generating a plurality of simultaneous frequency transmission signals; power allocation for each transmission signal, so that the power of each transmission signal is different; after power allocation Each of the transmission signals is superimposed into a mixed signal; the mixed signal is converted into an optical signal to obtain an optical mixed signal; the optical mixed signal is sent to the relay node through the FSO channel, so that the relay node converts the optical mixed signal into a radio frequency signal, The radio frequency mixed signal is obtained, and the radio frequency mixed signal is sent to the destination node through the RF channel; wherein, the destination node receives the radio frequency mixed signal, eliminates the interference signal in the radio frequency mixed signal, and obtains the transmission signal corresponding to the destination node.

本发明生成多个同时频的传输信号,对多个同时频的传输信号进行功率分配,使每个传输信号的功率均不相同,从而实现在保证每个传输信号完整的情况下,进行叠加,得到混合信号,从而实现多个传输信号以混合信号的形式利用同一时频资源在同一信道中进行传输,在目的节点接收到射频形式的射频混合信号后,对射频混合信号中的干扰信号进行消除,得到与目的节点对应的传输信号,完成混合FSO/RF链路中继传输过程,提高频谱利用率和传输信号吞吐量,缓解频谱资源紧缺的情况。The present invention generates a plurality of simultaneous frequency transmission signals, and performs power distribution on the multiple simultaneous frequency transmission signals, so that the power of each transmission signal is different, thereby achieving superposition under the condition of ensuring the integrity of each transmission signal, Obtain a mixed signal, so that multiple transmission signals can be transmitted in the same channel in the form of a mixed signal using the same time-frequency resource. After the destination node receives the mixed signal in the form of a radio frequency, the interference signal in the mixed signal is eliminated. , to obtain the transmission signal corresponding to the destination node, complete the hybrid FSO/RF link relay transmission process, improve spectrum utilization and transmission signal throughput, and alleviate the shortage of spectrum resources.

附图说明Description of drawings

为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据提供的附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

图1为本发明实施例提供的一种混合FSO/RF链路中继传输方法流程示意图;FIG. 1 is a schematic flowchart of a hybrid FSO/RF link relay transmission method provided by an embodiment of the present invention;

图2为本发明实施例提供的另一种混合FSO/RF链路中继传输方法流程示意图;FIG. 2 is a schematic flowchart of another hybrid FSO/RF link relay transmission method provided by an embodiment of the present invention;

图3为本发明实施例提供的一种源节点结构示意图;FIG. 3 is a schematic structural diagram of a source node provided by an embodiment of the present invention;

图4为本发明实施例提供的一种混合FSO/RF链路中继传输装置结构示意图。Fig. 4 is a schematic structural diagram of a hybrid FSO/RF link relay transmission device provided by an embodiment of the present invention.

具体实施方式Detailed ways

下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

本发明实施例公开了一种混合FSO/RF链路中继传输方法,参见图1所示,该方法包括:The embodiment of the present invention discloses a hybrid FSO/RF link relay transmission method, as shown in Figure 1, the method includes:

S1:生成多个同时频的传输信号;S1: Generate multiple simultaneous frequency transmission signals;

S2:对每个传输信号进行功率分配,使每个传输信号的功率均不相同;S2: Perform power allocation for each transmission signal, so that the power of each transmission signal is different;

S3:将功率分配后的每个传输信号叠加为混合信号;S3: superimposing each transmission signal after power allocation into a mixed signal;

S4:将混合信号转换为光信号,得到光混合信号;S4: converting the mixed signal into an optical signal to obtain an optical mixed signal;

S5:将光混合信号通过FSO信道发送至中继节点,以使中继节点将光混合信号转换为射频信号,得到射频混合信号,将射频混合信号通过RF信道发送至目的节点;S5: Send the optical mixed signal to the relay node through the FSO channel, so that the relay node converts the optical mixed signal into a radio frequency signal, obtains the radio frequency mixed signal, and sends the radio frequency mixed signal to the destination node through the RF channel;

其中,目的节点接收射频混合信号,消除射频混合信号中的干扰信号,得到与目的节点对应的传输信号。Wherein, the destination node receives the radio frequency mixed signal, eliminates the interference signal in the radio frequency mixed signal, and obtains the transmission signal corresponding to the destination node.

具体的,在生成传输信号时,不再生成依次对不同用户发送的传输信号,而是生成多个同时对不同用户发送的同时频的传输信号;在生成传输信号后,同时对每个传输信号相应的进行功率分配,为每个传输信号分配不同的功率,使每个传输信号的功率均不相同,因此可以令多个同时频的传输信号相互叠加,变为一个混合信号,令混合信号代替多个同时频的传输信号在同一信道中传输,实现同一信道同时传输多个传输信号,令多个用户共享一个信道,同一信道不再只分配给一个用户的传输信号进行处理,从而提高了单一信道的数据吞吐量。Specifically, when generating transmission signals, instead of generating transmission signals sequentially sent to different users, multiple simultaneous frequency transmission signals sent to different users at the same time are generated; after generating transmission signals, each transmission signal is simultaneously Correspondingly carry out power allocation, allocate different power for each transmission signal, so that the power of each transmission signal is different, so multiple transmission signals at the same frequency can be superimposed on each other to become a mixed signal, and the mixed signal can replace Multiple simultaneous-frequency transmission signals are transmitted in the same channel, realizing simultaneous transmission of multiple transmission signals on the same channel, allowing multiple users to share a channel, and the same channel is no longer only allocated to one user's transmission signal for processing, thereby improving the single The data throughput of the channel.

具体的,将混合信号转换为光信号后,将光混合信号通过单个FSO信道发送至中继节点,中继节点再将光混合信号转换为射频信号,得到射频混合信号通过单个RF信道发送至目的节点,目的节点则接收射频混合信号,由于同一信道上不同用户之间是非正交传输,这样就会产生用户间干扰问题,即不同传输信号间相互干扰,此时,射频混合信号中不与目的节点对应的传输信号对与目的节点来说就是干扰信号,因此,目的节点通过消除射频混合信号中的干扰信号,得到与目的节点对应的传输信号。Specifically, after converting the mixed signal into an optical signal, the optical mixed signal is sent to the relay node through a single FSO channel, and the relay node converts the optical mixed signal into a radio frequency signal, and the obtained radio frequency mixed signal is sent to the destination through a single RF channel node, and the destination node receives the RF mixed signal. Since different users on the same channel are non-orthogonal transmissions, this will cause inter-user interference, that is, different transmission signals interfere with each other. At this time, the RF mixed signal is not consistent with the destination The transmission signal corresponding to the node is an interference signal to the destination node. Therefore, the destination node obtains the transmission signal corresponding to the destination node by eliminating the interference signal in the radio frequency mixed signal.

可见,本发明实施例生成多个同时频的传输信号,对多个同时频的传输信号进行功率分配,使每个传输信号的功率均不相同,从而实现在保证每个传输信号完整的情况下,进行叠加,得到混合信号,从而实现多个传输信号以混合信号的形式利用同一时频资源在同一信道中进行传输,在目的节点接收到射频形式的射频混合信号后,对射频混合信号中的干扰信号进行消除,得到与目的节点对应的传输信号,完成混合FSO/RF链路中继传输过程,提高频谱利用率和传输信号吞吐量,缓解频谱资源紧缺的情况。It can be seen that the embodiment of the present invention generates multiple simultaneous-frequency transmission signals, and performs power allocation on multiple simultaneous-frequency transmission signals, so that the power of each transmission signal is different, thereby achieving , perform superposition to obtain a mixed signal, so that multiple transmission signals can be transmitted in the same channel in the form of a mixed signal using the same time-frequency resource. After the destination node receives the mixed signal in the form of radio frequency, the The interference signal is eliminated, and the transmission signal corresponding to the destination node is obtained, and the hybrid FSO/RF link relay transmission process is completed, the spectrum utilization rate and transmission signal throughput are improved, and the shortage of spectrum resources is alleviated.

本发明实施例公开了一种具体的混合FSO/RF链路中继传输方法,相对于上一实施例,本实施例对技术方案作了进一步的说明和优化。具体的:The embodiment of the present invention discloses a specific hybrid FSO/RF link relay transmission method. Compared with the previous embodiment, this embodiment further explains and optimizes the technical solution. specific:

具体的,参见图2所示,在对传输信号进行功率分配前,需要对传输信号进行编码和调制,因此,上述S1生成多个同时频的传输信号的过程,具体包括S11和S12;其中,Specifically, as shown in FIG. 2, before power allocation is performed on the transmission signal, the transmission signal needs to be encoded and modulated. Therefore, the process of generating multiple transmission signals at the same frequency in S1 above specifically includes S11 and S12; wherein,

S11:生成多个待传输的初始传输信号,对多个初始传输信号进行信道编码,得到多个同信道的编码传输信号;S11: Generate multiple initial transmission signals to be transmitted, perform channel coding on the multiple initial transmission signals, and obtain multiple coded transmission signals of the same channel;

S12:对多个编码传输信号进行信号调制,得到多个同时频的传输信号。S12: Perform signal modulation on multiple coded transmission signals to obtain multiple simultaneous frequency transmission signals.

具体的,生成多个发送至不同用户的待传输的初始传输信号,通过对每个初始传输信号进行信道编码,令每个初始传输信号均属于同一个信道,得到多个同信道的编码传输信号,再进行调制令每个编码传输信号搭载同一时隙、同一频率的载波,即同一时频资源,从而得到多个同时频的传输信号。Specifically, multiple initial transmission signals to be transmitted to different users are generated, and channel coding is performed on each initial transmission signal, so that each initial transmission signal belongs to the same channel, and multiple coded transmission signals of the same channel are obtained , and then perform modulation so that each coded transmission signal carries the carrier of the same time slot and frequency, that is, the same time-frequency resource, so as to obtain multiple transmission signals of the same frequency.

本发明实施例中利用非正交多址接入技术实现对每个传输信号进行功率分配,使每个传输信号的功率均不相同。In the embodiment of the present invention, the non-orthogonal multiple access technology is used to implement power allocation for each transmission signal, so that the power of each transmission signal is different.

其中,上述FSO信道和RF信道分别服从M衰落分布和瑞利衰落分布。Wherein, the above-mentioned FSO channel and RF channel obey the M fading distribution and the Rayleigh fading distribution respectively.

相应的,本发明实施例还公开了一种源节点,参见图3所示,该节点包括:Correspondingly, the embodiment of the present invention also discloses a source node, as shown in FIG. 3 , the node includes:

生成模块,用于生成多个同时频的传输信号;A generating module, configured to generate multiple simultaneous frequency transmission signals;

功率分配模块,用于对每个传输信号进行功率分配,使每个传输信号的功率均不相同;A power allocation module, configured to allocate power to each transmission signal, so that the power of each transmission signal is different;

叠加模块,用于将功率分配后的每个传输信号叠加为混合信号;a superposition module, configured to superimpose each transmission signal after power distribution into a mixed signal;

光电转换模块,用于将混合信号转换为光信号,得到光混合信号;The photoelectric conversion module is used to convert the mixed signal into an optical signal to obtain an optical mixed signal;

发送模块,用于将光混合信号通过FSO信道发送至中继节点。The sending module is used to send the optical mixed signal to the relay node through the FSO channel.

可见,本发明实施例生成多个同时频的传输信号,对多个同时频的传输信号进行功率分配,使每个传输信号的功率均不相同,从而实现在保证每个传输信号完整的情况下,进行叠加,得到混合信号,从而实现多个传输信号以混合信号的形式利用同一时频资源在同一信道中进行传输,在目的节点接收到射频形式的射频混合信号后,对射频混合信号中的干扰信号进行消除,得到与目的节点对应的传输信号,完成混合FSO/RF链路中继传输过程,提高频谱利用率和传输信号吞吐量,缓解频谱资源紧缺的情况。It can be seen that the embodiment of the present invention generates multiple simultaneous-frequency transmission signals, and performs power allocation on multiple simultaneous-frequency transmission signals, so that the power of each transmission signal is different, thereby achieving , perform superposition to obtain a mixed signal, so that multiple transmission signals can be transmitted in the same channel in the form of a mixed signal using the same time-frequency resource. After the destination node receives the mixed signal in the form of radio frequency, the The interference signal is eliminated, and the transmission signal corresponding to the destination node is obtained, and the hybrid FSO/RF link relay transmission process is completed, the spectrum utilization rate and transmission signal throughput are improved, and the shortage of spectrum resources is alleviated.

具体的,上述生成模块,包括生成单元、信道编码单元和调制单元;其中,Specifically, the above generation module includes a generation unit, a channel coding unit, and a modulation unit; wherein,

生成单元,用于生成多个待传输的初始传输信号;a generating unit, configured to generate a plurality of initial transmission signals to be transmitted;

信道编码单元,用于对多个初始传输信号进行信道编码,得到多个同信道的编码传输信号;A channel coding unit, configured to perform channel coding on a plurality of initial transmission signals to obtain a plurality of coded transmission signals of the same channel;

调制单元,用于对多个编码传输信号进行信号调制,得到多个同时频的传输信号。The modulation unit is used to perform signal modulation on multiple coded transmission signals to obtain multiple simultaneous frequency transmission signals.

上述功率分配模块,具体用于利用非正交多址接入技术对每个传输信号进行功率分配,使每个传输信号的功率均不相同。The above power allocation module is specifically used to allocate power to each transmission signal by using non-orthogonal multiple access technology, so that the power of each transmission signal is different.

其中,上述FSO信道和RF信道分别服从M衰落分布和瑞利衰落分布。Wherein, the above-mentioned FSO channel and RF channel obey the M fading distribution and the Rayleigh fading distribution respectively.

另外,本发明实施例还公开了一种混合FSO/RF链路中继传输装置,参见图4所示,该装置包括如前述的源节点、中继节点和目的节点;In addition, the embodiment of the present invention also discloses a hybrid FSO/RF link relay transmission device, as shown in FIG. 4, the device includes the aforementioned source node, relay node and destination node;

中继节点,用于通过FSO信道将光混合信号转换为射频信号,得到射频混合信号,将射频混合信号通过RF信道发送至目的节点;The relay node is used to convert the optical mixed signal into a radio frequency signal through the FSO channel, obtain the radio frequency mixed signal, and send the radio frequency mixed signal to the destination node through the RF channel;

目的节点,用于通过RF信道接收射频混合信号,消除射频混合信号中的干扰信号,得到与目的节点对应的传输信号。The destination node is configured to receive the radio frequency mixed signal through the RF channel, eliminate the interference signal in the radio frequency mixed signal, and obtain the transmission signal corresponding to the destination node.

其中,源节点的具体结构可以参考前述实施例,在此不再进行赘述。For the specific structure of the source node, reference may be made to the foregoing embodiments, and details are not repeated here.

具体的,上述中继节点,可以包括光电探测器、AF放大器和RF信号发射器;其中,Specifically, the above-mentioned relay node may include a photodetector, an AF amplifier, and an RF signal transmitter; wherein,

光电探测器,用于通过FSO信道接收光混合信号,并将光混合信号转换为射频信号,得到初始射频混合信号;A photodetector is used to receive the optical mixed signal through the FSO channel, and convert the optical mixed signal into a radio frequency signal to obtain an initial radio frequency mixed signal;

AF放大器,用于对初始射频混合信号进行放大,得到射频混合信号;The AF amplifier is used to amplify the initial radio frequency mixed signal to obtain the radio frequency mixed signal;

RF信号发射器,用于将射频混合信号通过RF信道发送至目的节点。The RF signal transmitter is used to send the radio frequency mixed signal to the destination node through the RF channel.

上述目的节点,可以包括信号接收器和干扰消除模块;其中,The above-mentioned destination node may include a signal receiver and an interference elimination module; wherein,

信号接收器,用于通过RF信道接收射频混合信号;a signal receiver for receiving a radio frequency mixed signal through an RF channel;

干扰消除模块,用于消除射频混合信号中的干扰信号,得到与目的节点对应的传输信号,干扰信号包括未与目的节点对应的传输信号。The interference elimination module is used to eliminate the interference signal in the radio frequency mixed signal to obtain the transmission signal corresponding to the destination node, and the interference signal includes the transmission signal not corresponding to the destination node.

最后,还需要说明的是,在本文中,诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来,而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且,术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含,从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下,由语句“包括一个……”限定的要素,并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。Finally, it should also be noted that in this text, relational terms such as first and second etc. are only used to distinguish one entity or operation from another, and do not necessarily require or imply that these entities or operations, any such actual relationship or order exists. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

专业人员还可以进一步意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,能够以电子硬件、计算机软件或者二者的结合来实现,为了清楚地说明硬件和软件的可互换性,在上述说明中已经按照功能一般性地描述了各示例的组成及步骤。这些功能究竟以硬件还是软件方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本发明的范围。Professionals can further realize that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, computer software or a combination of the two. In order to clearly illustrate the possible For interchangeability, in the above description, the composition and steps of each example have been generally described according to their functions. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

以上对本发明所提供的一种混合FSO/RF链路中继传输方法、装置及源节点进行了详细介绍,本文中应用了具体个例对本发明的原理及实施方式进行了阐述,以上实施例的说明只是用于帮助理解本发明的方法及其核心思想;同时,对于本领域的一般技术人员,依据本发明的思想,在具体实施方式及应用范围上均会有改变之处,综上所述,本说明书内容不应理解为对本发明的限制。A hybrid FSO/RF link relay transmission method, device, and source node provided by the present invention have been introduced above in detail. In this paper, specific examples are used to illustrate the principle and implementation of the present invention. The above embodiments The description is only used to help understand the method of the present invention and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and scope of application. In summary , the contents of this specification should not be construed as limiting the present invention.

Claims (10)

1. A relay transmission method of a hybrid FSO/RF link is applied to a source node and comprises the following steps:
generating a plurality of transmission signals at the same time frequency;
performing power distribution on each transmission signal to ensure that the power of each transmission signal is different;
superposing each transmission signal after power distribution into a mixed signal;
converting the mixed signal into an optical signal to obtain an optical mixed signal;
sending the optical mixed signal to a relay node through an FSO channel so that the relay node converts the optical mixed signal into a radio frequency signal to obtain a radio frequency mixed signal, and sending the radio frequency mixed signal to a destination node through an RF channel;
and the destination node receives the radio frequency mixed signal, eliminates an interference signal in the radio frequency mixed signal and obtains a transmission signal corresponding to the destination node.
2. The hybrid FSO/RF link relay transmission method according to claim 1, wherein said process of generating a plurality of co-time frequency transmission signals comprises:
generating a plurality of initial transmission signals to be transmitted, and carrying out channel coding on the plurality of initial transmission signals to obtain a plurality of co-channel coded transmission signals;
and carrying out signal modulation on the plurality of coded transmission signals to obtain a plurality of transmission signals with the same time frequency.
3. The hybrid FSO/RF link relay transmission method according to claim 1, wherein the FSO channel and the RF channel are subject to an M-fading distribution and a rayleigh fading distribution, respectively.
4. A hybrid FSO/RF link relay transmission method according to any of claims 1 to 3, wherein said process of allocating power to each transmission signal so that the power of each transmission signal is different comprises:
and performing power distribution on each transmission signal by using a non-orthogonal multiple access technology to ensure that the power of each transmission signal is different.
5. A source node, comprising:
the generating module is used for generating a plurality of transmission signals with the same time frequency;
the power distribution module is used for carrying out power distribution on each transmission signal so as to enable the power of each transmission signal to be different;
the superposition module is used for superposing each transmission signal after power distribution into the mixed signal;
the photoelectric conversion module is used for converting the mixed signal into an optical signal to obtain the optical mixed signal;
and the sending module is used for sending the optical mixed signal to the relay node through an FSO channel.
6. The source node of claim 5, wherein the generating module comprises:
a generating unit, configured to generate a plurality of initial transmission signals to be transmitted;
the channel coding unit is used for carrying out channel coding on the plurality of initial transmission signals to obtain a plurality of co-channel coded transmission signals;
and the modulation unit is used for carrying out signal modulation on the plurality of coded transmission signals to obtain a plurality of transmission signals with the same time frequency.
7. The source node according to claim 5 or 6, wherein the power allocation module is configured to allocate power to each transmission signal using a non-orthogonal multiple access technique, such that the power of each transmission signal is different.
8. A hybrid FSO/RF link relay transmission apparatus, comprising a source node, a relay node and a destination node according to any one of claims 5 to 7;
the relay node is used for receiving the optical mixed signal through the FSO channel, converting the optical mixed signal into a radio frequency signal to obtain a radio frequency mixed signal, and sending the radio frequency mixed signal to the destination node through the RF channel;
and the destination node is used for receiving the radio frequency mixed signal through the RF channel, eliminating an interference signal in the radio frequency mixed signal and obtaining a transmission signal corresponding to the destination node.
9. The hybrid FSO/RF link relay transmission apparatus of claim 8, wherein the relay node comprises:
the photoelectric detector is used for receiving the optical mixed signal through the FSO channel and converting the optical mixed signal into a radio frequency signal to obtain an initial radio frequency mixed signal;
the AF amplifier is used for amplifying the initial radio frequency mixed signal to obtain a radio frequency mixed signal;
an RF signal transmitter for transmitting the radio frequency composite signal to the destination node through the RF channel.
10. The hybrid FSO/RF link relay transmission apparatus of claim 8, wherein said destination node comprises:
a signal receiver for receiving the radio frequency composite signal over the RF channel;
and the interference elimination module is used for eliminating the interference signals in the radio frequency mixed signals to obtain transmission signals corresponding to the target node, wherein the interference signals comprise the transmission signals which do not correspond to the target node.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110519852A (en) * 2019-08-28 2019-11-29 广东工业大学 Communication means and relevant apparatus in a kind of multipoint wireless communication system
CN112054844A (en) * 2019-06-05 2020-12-08 北京大学 Multi-address access method and system in photoelectric hybrid network
CN112291001A (en) * 2020-10-23 2021-01-29 军事科学院系统工程研究院网络信息研究所 Electro-optical double-carrier mutual check free space communication method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150098707A1 (en) * 2011-05-31 2015-04-09 Aoptix Technologies, Inc. Integrated Commercial Communications Network Using Radio Frequency and Free Space Optical Data Communication
CN107342811A (en) * 2017-06-20 2017-11-10 中国矿业大学 A kind of method for asking the descending NOMA of visible light communication system to minimize power
CN107911166A (en) * 2017-11-14 2018-04-13 山东大学 A kind of visible ray/radio frequency mixing collaboration communication method based on wireless energy harvesting with non-orthogonal multiple

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150098707A1 (en) * 2011-05-31 2015-04-09 Aoptix Technologies, Inc. Integrated Commercial Communications Network Using Radio Frequency and Free Space Optical Data Communication
CN107342811A (en) * 2017-06-20 2017-11-10 中国矿业大学 A kind of method for asking the descending NOMA of visible light communication system to minimize power
CN107911166A (en) * 2017-11-14 2018-04-13 山东大学 A kind of visible ray/radio frequency mixing collaboration communication method based on wireless energy harvesting with non-orthogonal multiple

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MARZIEH NAJAFI 等: "Non-orthogonal multiple access for FSO backhauling", 《2018 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE (WCNC)》 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112054844A (en) * 2019-06-05 2020-12-08 北京大学 Multi-address access method and system in photoelectric hybrid network
CN112054844B (en) * 2019-06-05 2021-06-15 北京大学 Method and system for multiple access in an optoelectronic hybrid network
CN110519852A (en) * 2019-08-28 2019-11-29 广东工业大学 Communication means and relevant apparatus in a kind of multipoint wireless communication system
CN112291001A (en) * 2020-10-23 2021-01-29 军事科学院系统工程研究院网络信息研究所 Electro-optical double-carrier mutual check free space communication method

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Application publication date: 20181130