WO2016149950A1 - 一种接收机 - Google Patents

一种接收机 Download PDF

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Publication number
WO2016149950A1
WO2016149950A1 PCT/CN2015/075354 CN2015075354W WO2016149950A1 WO 2016149950 A1 WO2016149950 A1 WO 2016149950A1 CN 2015075354 W CN2015075354 W CN 2015075354W WO 2016149950 A1 WO2016149950 A1 WO 2016149950A1
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diplexer
output
energy
signal
receiver
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PCT/CN2015/075354
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French (fr)
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贡毅
全智
秦冲
韩子栋
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南方科技大学
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Priority to US15/169,322 priority Critical patent/US9641020B2/en
Publication of WO2016149950A1 publication Critical patent/WO2016149950A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits

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  • the present invention relates to the field of wireless communication technologies, and more particularly to a receiver.
  • Simultaneous Wireless Information and Energy Transfer which realizes the simultaneous transmission of information and energy through wireless, is an emerging communication technology integrating wireless communication technology and wireless energy transmission technology.
  • the integration of energy technology and communication technology has become a trend, and the development of society urgently needs the cross-integration of these two fields to become an important part of realizing “green communication”, which can achieve high-speed and reliable communication and be effective.
  • the pressure to alleviate energy and spectrum scarcity has important application value in industrial, medical and infrastructure development.
  • Wireless energy transmission is a technology with extremely broad application prospects. It is expected to be used in the Internet of Things and various wireless terminals or devices that rely on limited capacity batteries to provide power. By collecting energy from signals to feed them, the standby time is greatly extended.
  • Xinneng Synchronization is a new type of communication technology based on wireless energy transmission. It can transmit information and energy to the equipment at the same time. It can effectively solve the problem of standby time and the safety problems caused by aging of the line. Recently, it has been widely used. attention.
  • TS Time Switching
  • PS Power Splitting
  • an object of the present invention is to provide a receiver.
  • a receiver comprising: an antenna electrically connected in sequence, a band pass filter, a mixer, and a local oscillator electrically connected to the mixer, the receiver further comprising:
  • a diplexer for separating and outputting high and low frequency components in the mixer output signal
  • a rectifying unit configured to convert a high frequency component of the output of the diplexer into a direct current energy and stored in the battery
  • a first low pass filter for low pass filtering the low frequency component of the output of the diplexer to obtain a baseband information signal.
  • the present invention can also be improved as follows:
  • the rectifying unit comprises: a diode electrically connected in sequence and a second low pass filter;
  • the diode for rectifying a high frequency component of the output of the diplexer is the diode for rectifying a high frequency component of the output of the diplexer
  • the second low pass filter is configured to filter high harmonics in the diode rectified signal to obtain DC energy, and output the DC energy to the battery for storage.
  • the method further comprises: a low noise amplifier, an input of the low noise amplifier is connected to an output of the band pass filter, and an output of the low noise amplifier is connected to an input end of the mixer.
  • the method further includes: an analog to digital converter, an input end of the analog to digital converter being connected to an output end of the first low pass filter.
  • the invention introduces a Diplexer in the receiver, and separates the baseband signal and the carrier signal of the same road by losslessly, respectively performs information decoding and energy acquisition, realizes simultaneous signal transmission, and does not need to change the existing existing one. Modulation technology, strong compatibility, reasonable and simple structure, easy to implement.
  • FIG. 1 is a schematic structural diagram of a receiver according to the present invention.
  • FIG. 2 is a schematic structural diagram of a specific embodiment of a receiver according to the present invention.
  • a receiver of the present invention includes: an antenna electrically connected in sequence, a band pass filter, a mixer, and is electrically connected to the mixer.
  • Local oscillator the receiver also includes:
  • a dual-signal device for separating and outputting high and low frequency components in the mixer output signal
  • FIG. 2 is a schematic structural diagram of a specific embodiment of the receiver according to the present invention, as shown in FIG.
  • the rectifying unit comprises a diode electrically connected in sequence and a second low pass filter; wherein the diode is used for rectifying the high frequency component of the output of the diplexer, and the second low pass filter is used for filtering the diode after rectification The higher harmonics in the signal are used to obtain DC energy, and the DC energy is output to the battery for storage.
  • a first low pass filter configured to low pass filter the low frequency component of the output of the diplexer to obtain a baseband information signal.
  • the receiver further includes: a low noise amplifier and an analog to digital converter; the input of the low noise amplifier is connected to the output of the band pass filter, and the output of the low noise amplifier is connected to the mixer.
  • the input of the analog to digital converter is coupled to the output of the first low pass filter.
  • the RF signal received by the receiver's antenna passes through the bandpass filter and then enters the low noise amplifier. After the signal comes out of the low noise amplifier, it is mixed with the specific frequency generated by the local oscillator in the mixer, and then mixed.
  • the same signal of different frequencies is transmitted to the double signal, and the double signal separates the high frequency component and the low frequency component in the signal; the high frequency component is converted into direct current energy by the rectifying unit, and the direct current energy is stored in the battery for energy acquisition.
  • the low frequency component passes through the low frequency filter to obtain the final baseband signal to be processed, and the connection is made.
  • the analog-to-digital converter at the back end obtains the desired information through digital signal processing, so that information demodulation and energy acquisition can be simultaneously performed on the same signal, and the effect of simultaneous signal transmission can be achieved.
  • the modulation mode is AM amplitude modulation
  • N i (t) is a narrow-band Gaussian noise because it is obtained by smoothing Gaussian white noise through a band-pass filter. From the knowledge of stochastic processes, it can be composed of the in-phase component N c (t) and the quadrature component N s ( t) indicates.
  • the signal is divided into a baseband signal (low frequency component) and a double frequency signal (high frequency component), and the low frequency component and the high frequency component are separated by a double signal, wherein the low frequency component includes: 0.5K*N c ( t), 0.5A*m(t); high frequency components include:
  • the high-frequency component is converted to direct current through the rectifier, and the battery is charged to obtain energy.
  • the energy corresponding to the t)-0.5K*Ns(t)sin(2 ⁇ 0 t) signal is:
  • EH2 E ⁇ 0.5K*[Nc(t)cos(2 ⁇ 0 t)-Ns(t)sin(2 ⁇ 0 t)] ⁇ 2 ⁇
  • the pass filter filters out the higher harmonics and converts them into DC energy and stores them in the battery to store energy.
  • the information rate available is:
  • the low-frequency component baseband signal output from the diplexer filters out noise outside the bandwidth through the low-pass filter, thereby improving the signal-to-noise ratio, and then can be handed over to the back end for processing to obtain information.
  • the invention can realize information decoding and energy acquisition simultaneously, does not need to change the existing modulation technology, has strong compatibility, is reasonable and simple in structure, and is easy to implement, and the double letter device is basically lossless, and can achieve true information and energy simultaneously. The effect of passing.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

本发明公开了一种接收机，该接收机包括，依次电连接的天线、带通滤波器、混频器，与混频器电连接的本地振荡器，还包括：双信器，所述双信器用于将混频器输出信号中的高、低频分量分离并输出；整流单元，所述整流单元用于将双信器输出的高频分量变换成直流能量存储在蓄电池中。本发明在接收机中引入双信器，无损的把同一路的基带信号和载波信号分离开，分别进行信息解码和能量获取，实现信能同传，并且不需要改变目前已经存在的调制技术，兼容性强，结构合理简单，易于实施。

Description

一种接收机 技术领域
本发明涉及无线通信技术领域,更具体地说,本发明涉及一种接收机。
背景技术
无线信能同传(Simultaneous Wireless Information and Energy Transfer)，即通过无线方式实现信息和能量的同时传输，是集成无线通信技术和无线能量传输技术的新兴通信技术。随着科技的发展，整合能源技术和通信技术成为趋势，而社会的发展迫切需要这两个领域的交叉融合成为实现“绿色通信”的重要组成部分，既能实现高速可靠的通信，又能有效缓解能源和频谱稀缺的压力，在工业、医疗、基础设施发展等方面有着重要的应用价值。无线能量传输是一种有极其广泛应用前景的技术，有望用于物联网以及各类依靠有限容量电池提供电能的无线终端或器件，通过从信号中采集能量为其馈电，极大延长待机时间，突破传统电池供电的局限性。与传统的能量来源(如风能、太阳能等)相比，无线电获取能量具有很强稳定性和可持续性，并且无线电本身可以携带信息。信能同传是基于无线能量传输的一种新型通信技术，能够同时给设备传输信息和能量，可以有效解决待机时间问题以及由于线路老化所带来的安全问题等，最近受到了广泛的 关注。现有的进行信能同传的接收机设计方案，如时间切换(Time Switching，TS)和功率分裂(Power Spitting，PS)，只是对一束信号进行时间和功率分配，且存在严重的能量损耗，不能够达到真正的信息和能量同时传递的效果。
发明内容
为了解决上述技术问题，本发明的目的是提供一种接收机。
本发明所采用的技术方案是：一种接收机，包括，依次电连接的天线、带通滤波器、混频器，与混频器电连接的本地振荡器，该接收机还包括：
双信器，所述双信器用于将混频器输出信号中的高、低频分量分离并输出；
整流单元，所述整流单元用于将双信器输出的高频分量变换成直流能量存储在蓄电池中；
第一低通滤波器，所述第一低通滤波器用于将双信器输出的低频分量进行低通滤波获得基带信息信号。
在上述技术方案的基础上，本发明还可以做如下的改进：
优选的，所述整流单元包括：依次电连接的二极管和第二低通滤波器；
所述二极管，其用于对所述双信器输出的高频分量进行整流，
所述第二低通滤波器，其用于滤除经二极管整流后的信号中的高次谐波得到直流能量，并将直流能量输出至蓄电池进行存储。
优选的，还包括：低噪声放大器，所述低噪声放大器的输入端连接所述带通滤波器的输出端，所述低噪声放大器的输出端连接所述混频器的输入端。
优选的，还包括：模数转换器，所述模数转换器的输入端连接所述第一低通滤波器的输出端。
本发明的有益效果是：
本发明在接收机中引入双信器(Diplexer)，无损的把同一路的基带信号和载波信号分离开，分别进行信息解码和能量获取，实现信能同传，并且不需要改变目前已经存在的调制技术，兼容性强，结构合理简单，易于实施。
附图说明
下面结合附图对本发明的具体实施方式作进一步说明：
图1为本发明一种接收机的结构示意图；
图2为本发明一种接收机的具体实施例的结构示意图。
具体实施方式
以下结合附图对发明的原理和特征进行描述，所举实例只用于解释发明，并非用于限定本发明的范围。
图1为本发明一种接收机的结构示意图；如图1所示，本发明一种接收机，包括：依次电连接的天线、带通滤波器、混频器，与混频器电连接的本地振荡器，该接收机还包括：
双信器，双信器用于将混频器输出信号中的高、低频分量分离并输出；
整流单元，整流单元用于将双信器输出的高频分量变换成直流能量存储在蓄电池中；图2为本发明一种接收机的具体实施例的结构示意图，如图2所示，在本实施例中，整流单元包括依次电连接的二极管和第二低通滤波器；其中，二极管用于对双信器输出的高频分量进行整流，第二低通滤波器用于滤除经二极管整流后的信号中的高次谐波以得到直流能量，并将直流能量输出至蓄电池进行存储。
第一低通滤波器，第一低通滤波器用于将双信器输出的低频分量进行低通滤波获得基带信息信号。
如图2所示，在本实施例中，接收机还包括：低噪声放大器和模数转换器；低噪声放大器的输入端连接带通滤波器的输出端，低噪声放大器的输出端连接混频器的输入端；模数转换器的输入端连接第一低通滤波器的输出端。
下面以具体实施例的工作过程为例，对本发明的工作原理作进一步介绍。
接收机的天线接收到的射频信号通过带通滤波器，之后进入低噪声放大器，信号从低噪声放大器出来以后，在混频器内与本地振荡器产生的特定频率发生混频，把混合后包含不同频率的同一路信号传送至双信器，双信器把信号中的高频分量和低频分量分开；高频分量经过整流单元转换为直流能量，把直流能量存储在蓄电池中，用于能量获取；低频分量通过低频滤波器，得到最后要处理的基带信号，连接 后端的模数转换器，通过数字信号处理获得想要的信息，这样就可以对同一路信号同时的进行信息解调和能量获取，达到信能同传的效果。
在本实施例中假定调制方式为AM调幅，接收机的天线接收到的信号：S(t)+N(t)，其中S(t)是有用的信号，S(t)＝m(t)*cosω0t,其中m(t)是包含信息的基带信号，N(t)是附加白高斯噪声，经过低噪声放大器的信号：A*S(t)+K*N(t),其中A，K是常数，由于低噪声放大器会引入新的噪声，所以K>A。
经过带通滤波器的信号：A*S(t)+K*Ni(t),其中Ni(t)＝Nc(t)cos(ω0t)-Ns(t)sin(ω0t)。
Ni(t)是窄带高斯噪声，是因为它是由平稳高斯白噪声通过带通滤波器而得到的，由随机过程知识，它可以由同相分量Nc(t)和正交分量Ns(t)表示。功率关系为：P(Ni(t))＝P(Ns(t))＝P(Nc(t))＝N0B，B表示带宽，N0是功率谱密度。
在混频器内发生混频：
A*S(t)*cos(ω0t)＝A*m(t)*cos2(ω0t)＝0.5A*m(t)+0.5A*m(t)cos(2ωK*Ni(t)cos(ω0t)＝0.5K*Nc(t)+0.5K*Nc(t)cos(2ω0t)-0.5K*Ns(t)sin(2ω0t)
根据频率把信号分为基带信号(低频分量)和二倍频信号(高频分量)两路，通过双信器把低频分量和高频分量分开,其中，低频分量包括：0.5K*Nc(t)、0.5A*m(t)；高频分量包括：
0.5A*m(t)cos(2ω0t)、
0.5K*Nc(t)cos(2ω0t)-0.5K*Ns(t)sin(2ω0t)；
高频分量通过整流器变为直流，给蓄电池充电来获取能量，高频分量中的0.5A*m(t)cos(2ω0t)信号所对应的能量为：EH1＝0.25A2*E{(m(t)cos(2ω0t))2}＝0.125A2*E{(m(t))2}＝0.125A2Pm高频分量中的0.5K*Nc(t)cos(2ω0t)-0.5K*Ns(t)sin(2ω0t)信号所对应的能量为：
EH2＝E{{0.5K*[Nc(t)cos(2ω0t)-Ns(t)sin(2ω0t)]}2}
＝0.125K2*E{Nc(t)2}+0.125K2*E{Ns(t)2}
＝0.125K2N0B+0.125K2N0B
＝0.25K2N0B
高频分量所对应的总能量为：EH＝EH1+EH2＝0.125A2Pm+0.25K2N0B；从双信器输出的二倍频高频分量经过二极管整流、第二低通滤波器滤除高次谐波转化为直流能量并储存在蓄电池中蓄能，实现能量采集。
可获得的信息速率为：
Figure PCTCN2015075354-appb-000001
从双信器输出的低频分量基带信号通过低通滤波器滤除带宽以外的噪声，进而提升信噪比，之后就可以交给后端进行处理来获取信息。
本发明通过可以实现信息解码和能量获取同时进行，不需要改变目前已经存在的调制技术，兼容性强，结构合理简单，易于实施，另外双信器基本无损耗，能够达到真正的信息和能量同时传递的效果。
以上是对本发明的较佳实施进行了具体说明，但本发明创造并不 限于实施例，熟悉本领域的技术人员在不违背本发明精神的前提下还可做作出种种的等同变形或替换，这些等同的变形或替换均包含在本申请权利要求所限定的范围内。

Claims (4)

  1. 一种接收机，包括，依次电连接的天线、带通滤波器、混频器，与混频器电连接的本地振荡器，该接收机还包括：
    双信器，所述双信器用于将混频器输出信号中的高、低频分量分离并输出；
    整流单元，所述整流单元用于将双信器输出的高频分量变换成直流能量存储在蓄电池中；
    第一低通滤波器，所述第一低通滤波器用于将双信器输出的低频分量进行低通滤波获得基带信息信号。
  2. 根据权利要求1所述一种接收机，其特征在于：
    所述整流单元包括：依次电连接的二极管和第二低通滤波器；
    所述二极管，其用于对所述双信器输出的高频分量进行整流，
    所述第二低通滤波器，其用于滤除经二极管整流后的信号中的高次谐波得到直流能量，并将直流能量输出至蓄电池进行存储。
  3. 根据权利要求1或2所述一种接收机，其特征在于：
    还包括：低噪声放大器，所述低噪声放大器的输入端连接所述带通滤波器的输出端，所述低噪声放大器的输出端连接所述混频器的输入端。
  4. 根据权利要求3所述一种接收机，其特征在于：
    还包括：模数转换器，所述模数转换器的输入端连接所述第一低通滤波器的输出端。
PCT/CN2015/075354 2015-03-25 2015-03-30 一种接收机 WO2016149950A1 (zh)

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