WO2022001546A1 - Procédé et appareil de transmission de signal, et dispositif de réseau - Google Patents

Procédé et appareil de transmission de signal, et dispositif de réseau Download PDF

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Publication number
WO2022001546A1
WO2022001546A1 PCT/CN2021/097400 CN2021097400W WO2022001546A1 WO 2022001546 A1 WO2022001546 A1 WO 2022001546A1 CN 2021097400 W CN2021097400 W CN 2021097400W WO 2022001546 A1 WO2022001546 A1 WO 2022001546A1
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Prior art keywords
light
signal
local oscillator
sideband
emitted
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PCT/CN2021/097400
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English (en)
Chinese (zh)
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范忱
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中兴通讯股份有限公司
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Publication of WO2022001546A1 publication Critical patent/WO2022001546A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters
    • H04B10/501—Structural aspects
    • H04B10/503—Laser transmitters
    • H04B10/505—Laser transmitters using external modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters
    • H04B10/516—Details of coding or modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters
    • H04B10/516—Details of coding or modulation
    • H04B10/548—Phase or frequency modulation
    • H04B10/556—Digital modulation, e.g. differential phase shift keying [DPSK] or frequency shift keying [FSK]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters
    • H04B10/516—Details of coding or modulation
    • H04B10/548—Phase or frequency modulation
    • H04B10/556—Digital modulation, e.g. differential phase shift keying [DPSK] or frequency shift keying [FSK]
    • H04B10/5561—Digital phase modulation

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and in particular, to a signal transmission method, an apparatus, and a network device.
  • the base station density of the network will be higher. Therefore, for the base station, lighter weight, smaller size and lower power consumption are the first considerations in designing a communication system, and the optical carrier radio frequency technology can well solve the above problems.
  • Coherent optical carrier radio frequency technology is the key technology of next-generation optical communication. Compared with the traditional direct detection scheme, coherent optical carrier transmission technology has higher sensitivity, which can generally be improved by 10-20dB. It can also be improved by 3dB compared with the heterodyne coherent technology.
  • the principle of coherent communication is to add a local oscillator light with the same frequency, phase, and polarization direction to the received signal light, and the two beams of light undergo interference mixing.
  • the application of higher-order modulation formats enables coherent optical communication to have higher spectral utilization of single-wavelength channels.
  • the light source (including the local oscillator light and the signal light) at the transmitting end of the self-homodyne coherent optical carrier microwave transmission method comes from the same laser, but it needs to be transmitted through two channels respectively, and the coherence of the two channels of light changes during the transmission process. Poor, the receiving end needs to use a DSP (Digital Signal Processing, digital signal processing) circuit to perform relevant signal compensation on the received signal in order to reconstruct the signal.
  • DSP Digital Signal Processing, digital signal processing
  • the inventor found that since the traditional coherent receiving end needs to rely on high-speed digital signal processing technology to perform relevant signal compensation on the received signal, the signal can be reconstructed and distortion compensation can be realized, while
  • the DSP circuit that realizes high-speed signal processing technology needs to include digital processing, mixer and clock circuits, and its volume, weight and power consumption are large, which increases the hardware (Active Antenna Unit, AAU) / radio frequency
  • AAU Active Antenna Unit
  • RRU Radio Remote Unit
  • An embodiment of the present application provides a signal transmission method, including: obtaining a first electrical signal and a second electrical signal; performing polarization separation on an optical signal emitted by a laser to obtain signal light and local oscillator light; converting the first electrical signal The modulated signal light is modulated onto the first sideband of the signal light, the second electrical signal is modulated onto the second sideband of the signal light, and the modulated signal light is obtained; the modulated signal light and the The local oscillator light is combined into emitted light for transmission.
  • Embodiments of the present application further provide a signal transmission method, including: receiving emitted light, where the emitted light includes signal light and local oscillator light; performing optical filtering processing on the emitted light to obtain first sideband light and a second sideband light, wherein the first sideband light includes a first sideband of the signal light and the local oscillator light, and the second sideband light includes a second sideband of the signal light and the local oscillator light; demodulate the first sideband light and the second sideband light respectively to obtain a first electrical signal and a second electrical signal.
  • the embodiments of the present application also provide a signal transmission device, including: a laser, a polarization beam splitter, an IQM modulator, a phase delayer, and a beam combiner; wherein the laser is used to transmit an optical signal; the polarization beam The beam splitter is used for polarization separation of the optical signal to obtain signal light and local oscillator light; the IQM modulator is used for modulating the received first electrical signal to the first sideband of the signal light , modulate the received second electrical signal on the second sideband of the signal light to obtain the modulated signal light; the phase delayer is used to perform phase correction on the local oscillator light to obtain The corrected local oscillator light; the beam combiner is configured to perform beam combining processing on the corrected local oscillator light and the modulated signal light to generate and transmit the emitted light.
  • a signal transmission device including: a laser, a polarization beam splitter, an IQM modulator, a phase delayer, and a beam combiner; wherein the laser is
  • Embodiments of the present application also provide a signal transmission device, comprising: a first optical filter, a second optical filter, a first photodetector, and a second photodetector; wherein, the first optical filter, is used for filtering the received emitted light to obtain first sideband light, wherein the first sideband light includes the first sideband of the signal light and the local oscillator light; the second light a filter, used for filtering the received emitted light to obtain second sideband light, wherein the second sideband light includes the second sideband of the signal light and the local oscillator light; the The first photodetector is used to demodulate the first sideband light to obtain a first electrical signal; the second photodetector is used to demodulate the second sideband light to obtain the first electrical signal. Two electrical signals.
  • Embodiments of the present application also provide a network device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores data that can be executed by the at least one processor The instructions are executed by the at least one processor to enable the at least one processor to perform the signal transmission method described above.
  • FIG. 1 is a flowchart of a signal transmission method provided by a first embodiment of the present application
  • FIG. 2 is a flowchart of a signal transmission method provided by a second embodiment of the present application.
  • FIG. 3 is a flowchart of a signal transmission method provided by a third embodiment of the present application.
  • FIG. 4 is a flowchart of a signal transmission method provided by a fourth embodiment of the present application.
  • FIG. 5 is a schematic diagram of a signal transmission apparatus provided by a fifth embodiment of the present application.
  • Fig. 6 is the schematic diagram of the spectrum of the corresponding node in Fig. 5;
  • FIG. 7 is a schematic diagram of double SSB signal generation in some cases.
  • FIG. 8 is a schematic diagram of a signal transmission apparatus provided by a sixth embodiment of the present application.
  • Fig. 9 is the schematic diagram of the spectrum of the corresponding node in Fig. 7;
  • FIG. 10 is a schematic diagram of a network device provided by a seventh embodiment of the present application.
  • the purpose of the embodiments of the present application is to provide a signal transmission method, apparatus, and network device, in which hardware design does not require a digital signal processing circuit, and can reduce the volume, weight, and power consumption of hardware design.
  • the first embodiment of the present application relates to a signal transmission method, see FIG. 1 , and includes the following steps.
  • Step S101 acquiring a first electrical signal and a second electrical signal.
  • the first electrical signal and the second electrical signal are baseband signals.
  • the real part and the imaginary part of the complex signal are converted according to the addition characteristic of the Fourier transform.
  • the parts are separated and used as I/Q signals to drive the IQ modulator respectively. This part of the content will be described in detail later, but this is just a brief introduction.
  • step S102 the optical signal emitted by the laser is subjected to polarization separation to obtain signal light and local oscillator light.
  • the optical signal emitted by the laser is separated into X-polarized light and Y-polarized light by a polarization beam splitter (PBS), and the frequencies of the two are the same, wherein the X-polarization is used as the signal light for modulation, and the Y-polarization is used as the coherent light.
  • PBS polarization beam splitter
  • Step S103 modulate the first electrical signal on the first sideband of the signal light, modulate the second electrical signal on the second sideband of the signal light, and obtain modulated signal light.
  • the first electrical signal and the second electrical signal are modulated onto the two sidebands of the signal light, specifically, the first electrical signal and the second electrical signal are passed through an in-phase/quadrature-phase modulator (In-phase/Quadrature-phase Modulator, IQM) is modulated to the upper and lower sidebands of the X polarization state, so that there is no interference between the two electrical signals.
  • In-phase/Quadrature-phase Modulator In-phase/Quadrature-phase Modulator, IQM
  • Step S104 combining the modulated signal light and the local oscillator light into emission light for transmission.
  • the modulated signal light and the local oscillator light are combined by a beam combiner (Optical Combiner, OC) for transmission through an optical fiber, which can ensure a strong phase correlation between the two signal lights.
  • a beam combiner Optical Combiner, OC
  • the first electrical signal is modulated onto the first sideband of the signal light
  • the second electrical signal is modulated onto the second sideband of the signal light
  • the modulated signal is obtained light
  • the modulated signal light and the local oscillator light are combined into emission light for transmission
  • the first electrical signal and the second electrical signal can be modulated onto the two sidebands of the signal light through single sideband processing.
  • the second embodiment of the present application relates to a signal transmission method.
  • the second embodiment is substantially the same as the first embodiment, and the differences are as follows.
  • step S104 combining the modulated signal light and the local oscillator light into emission light for transmission, includes the following steps.
  • Step S1041 performing phase correction on the local oscillator light to obtain the corrected local oscillator light.
  • phase Delay Time, TOD Phase Delay Time
  • Step S1042 performing beam combining processing on the corrected local oscillator light and the modulated signal light to generate and transmit emitted light.
  • phase-corrected X-polarized signal light and the Y-polarized local oscillator light are combined by a polarization beam combiner (Polarization Beam Combiner, PBC), and then transmitted through an optical fiber.
  • a polarization beam combiner Polarization Beam Combiner, PBC
  • step S1041 the phase correction is performed on the local oscillator light, and after the corrected local oscillator light is obtained, in step S1042, the corrected local oscillator light and the modulated light are obtained in step S1042.
  • the signal light is combined, the emitted light is generated and sent, and it also includes:
  • Step S1043 Perform polarization rotation on the corrected local oscillator light to obtain the rotated local oscillator light, wherein the rotated local oscillator light is consistent with the polarization state of the modulated signal light.
  • the polarization rotation of the local oscillator light (Y-polarized light) is performed through a Faraday Rotator Mirror (FRM), so that the polarization states of the rotated local oscillator light and the modulated signal light are consistent.
  • FAM Faraday Rotator Mirror
  • Step S1042 performing beam combination processing on the corrected local oscillator light and the modulated signal light to generate and transmit emitted light is specifically: combining the rotated local oscillator light and the modulated signal light.
  • the signal light undergoes beam combining processing to generate emitted light and send it.
  • the demodulated signal can be directly connected to the wave control board , greatly reducing the complexity of hardware design, as well as weight, size and power consumption.
  • the third embodiment of the present application relates to a signal transmission method, see FIG. 3 , and includes the following steps.
  • Step S201 receiving emitted light, wherein the emitted light includes signal light and local oscillator light.
  • the emitted light is received after being transmitted by an optical fiber, and the emitted light includes signal light and local oscillator light.
  • the signal light is a modulated signal light, and the upper and lower sidebands are modulated with a first electrical signal and a second electrical signal respectively.
  • Step S202 performing optical filtering processing on the emitted light to obtain first sideband light and second sideband light, wherein the first sideband light includes the first sideband of the signal light and the local oscillator light, the second sideband light includes a second sideband of the signal light and the local oscillator light.
  • the emitted light is subjected to optical filtering processing by an optical filter (Optical Band Pass Filter, OBPF) to obtain the first sideband (corresponding to the first electrical signal) and the local oscillator light of the signal light, and the second sideband respectively. band (corresponding to the first electrical signal) and local oscillator light.
  • OBPF Optical Band Pass Filter
  • Step S203 demodulate the first sideband light and the second sideband light respectively to obtain a first electrical signal and a second electrical signal.
  • the required first electrical signal and the second electrical signal can be obtained by performing homodyne beat frequency with the first sideband and the second sideband respectively by the local oscillator light.
  • light filtering processing is performed on the emitted light to obtain first sideband light and second sideband light, wherein the first sideband light includes the first sideband of the signal light and the Local oscillator light, the second sideband light includes the second sideband of the signal light and the local oscillator light, respectively demodulate the first sideband light and the second sideband light to obtain
  • the first electrical signal and the second electrical signal are processed by SSB and sent together. Therefore, after the receiving end demodulates the first electrical signal and the second electrical signal, it is not necessary to perform the SSB processing on the two electrical signals. Compensation can save the DSP circuit that needs to be used for compensation, which can reduce the size, weight and power consumption of hardware design.
  • the fourth embodiment of the present application relates to a signal transmission method.
  • the fourth embodiment is substantially the same as the third embodiment, and the differences are as follows.
  • step S201 after receiving the emitted light, in step S202 , before performing optical filtering processing on the emitted light to obtain the first sideband light and the second sideband light, the following steps are further included.
  • Step S204 performing branch processing on the emitted light to obtain the signal light and the local oscillator light.
  • a wavelength division module (Wavelength Division Module, WDM) can realize the split processing of the emitted light to obtain signal light and local oscillator light.
  • the signal light is the modulated signal light, and the upper and lower sidebands are modulated with a first electrical signal and a second electrical signal.
  • Step S205 performing polarization rotation on the local oscillator light to obtain the rotated local oscillator light.
  • the polarization rotation of the local oscillator light is performed by the Faraday rotating mirror FRM to make it consistent with the polarization of the sideband light signal.
  • Step S206 the signal light is reflected to obtain the reflected signal light, wherein the rotated local oscillator light is in phase with the reflected signal light.
  • the signal light is reflected by a Faraday Mirror (FM) to ensure that the phase of the local oscillator light with Y polarization is consistent.
  • FM Faraday Mirror
  • Step S207 combining the reflected signal light and the rotated local oscillator light to generate the emission light to be processed.
  • the emitted light to be processed includes the reflected signal light with the same phase and polarization state and the rotated local oscillator light.
  • the optical filtering processing and the demodulation processing are performed subsequently.
  • step S202 performing optical filtering processing on the emitted light to obtain the first sideband light and the second sideband light, specifically: performing optical filtering on the emitted light to be processed. Filter processing to obtain the first sideband light and the second sideband light.
  • the emitted light to be processed obtains the first sideband light and the second sideband light through the optical filter OBPF.
  • the demodulated signal can be directly connected to the wave control board, greatly reducing the Reduce hardware design complexity, as well as weight, size and power consumption.
  • the fifth embodiment of the present application relates to a signal transmission device, including a transmitting end and a receiving end, and the transmitting end includes: a laser, a polarization beam splitter, an IQM modulator, a phase delayer, and a beam combiner; wherein, the laser , used to transmit an optical signal; the polarization beam splitter is used to polarize the optical signal to obtain signal light and local oscillator light; the IQM modulator is used to modulate the received first electrical signal to the first sideband of the signal light, modulate the received second electrical signal on the second sideband of the signal light, and obtain the modulated signal light; the phase delay device is used to The local oscillator light is phase-corrected to obtain the corrected local oscillator light; the beam combiner is used for combining the corrected local oscillator light and the modulated signal light to generate emission light and send.
  • the receiving end includes: a first optical filter, a second optical filter, a first photodetector and a second photodetector; wherein the first optical filter is used to filter the received emitted light processing to obtain first sideband light, wherein the first sideband light includes the first sideband of the signal light and the local oscillator light; the second optical filter is used for the received emission The light is filtered to obtain a second sideband light, wherein the second sideband light includes the second sideband of the signal light and the local oscillator light; the first photodetector is used to The first sideband light is demodulated to obtain a first electrical signal; the second photodetector is used to demodulate the second sideband light to obtain a second electrical signal.
  • the receiving end further includes: a wavelength division module, a Faraday rotating mirror and a Faraday reflector; wherein the wavelength division module is used to perform branch processing on the emitted light to obtain the signal light and the local oscillator light
  • the Faraday rotating mirror is used for polarizing and rotating the local oscillator light to obtain the rotated local oscillator light; the Faraday mirror is used for reflecting the signal light to obtain the reflected signal light, Wherein, the rotated local oscillator light is in phase with the reflected signal light; then the first optical filter is also used for filtering the emitted light to be processed to obtain the first sideband light, wherein , the first sideband light includes the first sideband of the signal light and the local oscillator light, and the emitted light to be processed is generated by combining the reflected signal light and the rotated local oscillator light
  • the second optical filter is also used for filtering the emitted light to be processed to obtain a second sideband light, wherein the second sideband light includes the second sideband
  • the signal transmission device includes a transmitting end and a receiving end, and the transmitting end includes: a laser 1, a polarization beam splitter PBS2, an IQM Modulator 3, phase delay device TOD4, polarization beam combiner PBC5; the receiving end includes: circulator C1, wavelength division module WDM6, Faraday rotating mirror FRM7, Faraday mirror FM8, optical filter OBPF 9, 10 and photodetector PD 11, 12.
  • the light emitted by the laser 1 is polarized and separated by the polarization beam splitter PBS2, the X polarized light is modulated as the signal light, and the Y polarized light is used as the local oscillator light required for coherent reception.
  • the electrical signal is subjected to single-sideband modulation (corresponding to the a signal) to the signal light through the IQM modulator 3, and this modulation method makes the signals S1 and S2 respectively on the two sidebands of the X-polarized light.
  • the Y-polarized light is phase-corrected by the phase delay device TOD4 (corresponding to the b signal), and then the X-polarized signal light and the Y-polarized local oscillator light are combined by the polarization beam combiner PBC5 (corresponding to the c signal), and then passed through the polarization beam combiner PBC5.
  • Optical fiber transmission and then enter from port 1 of the circulator C1 and exit from port 2.
  • the sideband optical signal and the Y-polarized local oscillator light are split through the wavelength division module WDM6, and the Y-polarized local oscillator light then passes through the Faraday rotator FRM7.
  • the polarization rotation is performed to make it consistent with the polarization of the sideband optical signal, and the sideband light passes through the Faraday mirror FM8 to ensure that the phase of the Y-polarized local oscillator light is consistent, and finally the sideband optical signal and the local oscillator light are recombined. , enters port 2 of circulator C1, and then exits port 3 (corresponding to the d signal).
  • the optical filters OBPF 9, 10 the two sideband lights (corresponding to the e, f signals) containing the local oscillator light are filtered out respectively, and then the signals S1 and S2 are demodulated by the photodetectors PD 11, 12, and then the signals S1 and S2 can be demodulated.
  • the schematic diagrams of the spectra corresponding to the a, b, c, d, e, and f signals in the figure are shown in Fig. 6 .
  • Figure 7 shows the principle of double-sideband optical signal generation.
  • a single polarization state enables 2-dimensional signal transmission.
  • S 1 (t) and S 2 (t) Both of these signals are baseband signals, the spectrum of which is shown in Figure 7.
  • the up-converted real-numbered radio frequency signal is processed by single-sideband filtering to become a complex single-sideband signal.
  • the single sideband filter is shown in Fig. 7, including the Hilbert transform and the complex number j.
  • the single sideband signal of the upper sideband or the lower sideband can be obtained by adjusting the positive or negative value of j.
  • the spectrum of the resulting SSB signals a(t) and b(t) are shown in the figure. a(t) and b(t) can be expressed as:
  • the sixth embodiment of the present application relates to a signal transmission device, including a transmitting end and a receiving end, and the transmitting end includes: a laser, a polarization beam splitter, an IQM modulator, a phase delayer, and a beam combiner; wherein, the laser , used to transmit an optical signal; the polarization beam splitter is used to polarize the optical signal to obtain signal light and local oscillator light; the IQM modulator is used to modulate the received first electrical signal to the first sideband of the signal light, modulate the received second electrical signal on the second sideband of the signal light, and obtain the modulated signal light; the phase delay device is used to The local oscillator light is phase-corrected to obtain the corrected local oscillator light; the beam combiner is used for combining the corrected local oscillator light and the modulated signal light to generate emission light and send.
  • the transmitting end further includes: a Faraday rotating mirror; wherein, the Faraday rotating mirror is used to perform polarization rotation on the corrected local oscillator light to obtain the rotated local oscillator light, wherein the rotated local oscillator light is obtained.
  • the polarization state of the vibrating light is the same as that of the modulated signal light; the beam combiner is also used to combine the rotated local oscillator light and the modulated signal light to generate emitted light and transmit it .
  • the receiving end includes: a first optical filter, a second optical filter, a first photodetector and a second photodetector; wherein the first optical filter is used to filter the received emitted light processing to obtain first sideband light, wherein the first sideband light includes the first sideband of the signal light and the local oscillator light; the second optical filter is used for the received emission The light is filtered to obtain a second sideband light, wherein the second sideband light includes the second sideband of the signal light and the local oscillator light; the first photodetector is used to The first sideband light is demodulated to obtain a first electrical signal; the second photodetector is used to demodulate the second sideband light to obtain a second electrical signal.
  • the transmitting end includes: a laser 1, a polarization beam splitter PBS2, an IQM modulator 3, and a beam combiner OC4, circulator C1, phase delay device TOD5, Faraday rotating mirror FRM6; the receiving end includes: optical filter OBPF 7, 8, photodetector PD 9, 10.
  • the light emitted by the laser 1 on the left side is polarized and separated by the polarization beam splitter PBS2, the X polarized light is modulated as the signal light, and the Y polarized light is used as the local oscillator light required for coherent reception.
  • the electrical signal is subjected to single-sideband modulation (corresponding to a signal) to the signal light through the IQM modulator 3.
  • This modulation method makes the signals S1 and S2 on the two sidebands of the X-polarized light respectively, and the local oscillator light of the Y-polarized light (corresponding to b signal), it enters through port 1 of circulator C1, and exits through port 2, and then performs phase correction through phase delay device TOD5, and then performs polarization rotation through Faraday rotator FRM6 to make the polarization state of Y-polarized local oscillator light. It is consistent with the signal light of the polarization state of the X-polarized light.
  • the circulators in the fifth embodiment and the sixth embodiment can also be implemented by other circuit structures, for example, a multiplexer, etc., as long as the input and output of signals can be realized.
  • the mode, frequency, and bandwidth of the signal to be modulated can be changed according to the needs of the user, and the coherent optical carrier transmission that can realize multi-mode and multi-frequency fusion of high and low frequencies can be realized, because there is no traditional
  • the digital processing module, frequency conversion module and clock of the base station greatly reduce the complexity of the structure, reduce the cost, and solve its size, weight and power consumption problems.
  • the IQ mismatch of the Hybrid used in traditional coherent reception can also be effectively avoided, and the phase noise introduced by this mismatch can be eliminated.
  • the present application is not limited to the transmission applied to the base station, and can also be applied to the fields using coherent transmission such as data centers.
  • the seventh embodiment of the present application relates to a network device, as shown in FIG. 10 , comprising: at least one processor 1001 ; and a memory 1002 communicatively connected to the at least one processor 1001 ; wherein the memory 1002 stores Instructions executable by the at least one processor, the instructions are executed by the at least one processor 1001, so that the at least one processor 1001 can execute the signal transmission method provided by the above embodiments of the present application.
  • the memory and the processor are connected by a bus, and the bus may include any number of interconnected buses and bridges, and the bus connects one or more processors and various circuits of the memory.
  • the bus may also connect together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein.
  • the bus interface provides the interface between the bus and the transceiver.
  • a transceiver may be a single element or multiple elements, such as multiple receivers and transmitters, providing a means for communicating with various other devices over a transmission medium.
  • the data processed by the processor is transmitted on the wireless medium through the antenna, and further, the antenna also receives the data and transmits the data to the processor.
  • the processor is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interface, voltage regulation, power management, and other control functions. Instead, memory may be used to store data used by the processor in performing operations.

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  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
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  • Optics & Photonics (AREA)
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Abstract

Les modes de réalisation de la présente invention se rapportent au domaine technique des communications. Un procédé et un appareil de transmission de signal, et un dispositif de réseau sont divulgués. Le procédé de transmission de signal comprend : l'acquisition d'un premier signal électrique et d'un second signal électrique ; la réalisation d'une séparation de polarisation sur un signal optique émis par un laser, de façon à acquérir une lumière de signal et une lumière d'oscillation locale ; la modulation du premier signal électrique sur une première bande latérale de la lumière de signal, et la modulation du second signal électrique sur une seconde bande latérale de la lumière de signal, de façon à acquérir une lumière de signal modulée ; et la combinaison de la lumière de signal modulée et de la lumière d'oscillation locale en lumière émise pour la transmission.
PCT/CN2021/097400 2020-06-29 2021-05-31 Procédé et appareil de transmission de signal, et dispositif de réseau WO2022001546A1 (fr)

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CN202010606768.9A CN113938204A (zh) 2020-06-29 2020-06-29 信号传输方法、装置及网络设备
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