CN110611514B - Signal demodulation system, method and computer storage medium for distributed receiver - Google Patents
Signal demodulation system, method and computer storage medium for distributed receiver Download PDFInfo
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- CN110611514B CN110611514B CN201910889096.4A CN201910889096A CN110611514B CN 110611514 B CN110611514 B CN 110611514B CN 201910889096 A CN201910889096 A CN 201910889096A CN 110611514 B CN110611514 B CN 110611514B
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- H—ELECTRICITY
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- 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
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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- H04L7/0075—Arrangements for synchronising receiver with transmitter with photonic or optical means
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Abstract
The invention provides a signal demodulation system and a method of a distributed receiver, a voltage comparator and a computer storage medium, wherein the signal demodulation system comprises a transmitting end, a far end and a centralized processing end, the far end and the centralized processing end are connected through a bidirectional optical fiber, the far end receives a high-order modulation signal transmitted by the transmitting end through an antenna, an electric signal is converted into an optical signal through a differential electro-optical converter and transmitted to the centralized processing end, the centralized processing end acquires a signal value corresponding to a signal data jumping position by using a periodic comparison threshold voltage waveform generated by a comparison threshold, outputs a sampling value and further converts the sampling value into a single-bit high-speed signal, the optical signal is converted into the electric signal by using the differential electro-optical converter, and finally, the electric signal is recovered to an original modulation signal by using a band-pass filter and transmitted. The technical scheme of the invention realizes the demodulation of high-order modulation signals by virtualizing the effect of the multi-bit voltage comparator by using the single-bit voltage comparator, and is suitable for the signal demodulation of high-frequency tuning signals.
Description
[ technical field ] A method for producing a semiconductor device
The invention belongs to the field of signal demodulation, and particularly relates to a signal demodulation system and method of a distributed receiver, a voltage comparator and a computer storage medium.
[ background of the invention ]
Amplitude-phase modulation is often used in digital communication and radar systems to transmit signals or sense objects, and an analog-to-digital signal converter is very important in the systems, but an analog-to-digital converter is often used in cooperation with a digital signal processor and consumes a certain amount of electric energy. In distributed multi-antenna communication and radar systems, the receivers are often distributed at different locations and interconnected synchronously by optical fibers, and it is common practice to digitize analog signals at the receiving antenna end by an analog-to-digital signal converter and transmit the digitized signals over optical fibers.
U.S. patent No. 7885359 to the fine epson corporation, the patent name: sampling demodulator for Amplitude Shift Keying (ASK) radio receiver, which discloses a Sampling demodulator for an Amplitude Shift Keying (ASK) radio receiver, ASK being a relatively simple demodulation scheme in which the carrier amplitude varies with the demodulated signal, ASK being equivalent to amplitude modulation in an analog signal, although it mentions that ASK demodulated signal can be sampled as a binary bit stream using a single comparator with a regulated voltage, there is no processing capability for the phase modulated signal, thus limiting the available modulation schemes
Therefore, it is necessary to develop a signal demodulation method and apparatus suitable for high frequency tuning signals.
[ summary of the invention ]
In order to solve the above problems, the present invention provides a signal demodulation system, method, comparator and computer storage medium for a distributed receiver.
The technical scheme of the invention is as follows:
in a first aspect, the invention provides a signal demodulation system of a distributed receiver, which comprises a band-pass filter, a differential electro-optical converter, a transmitting end, a far end and a centralized processing end, wherein the far end and the centralized processing end are connected through an optical fiber;
the far end receives a high-order modulation signal transmitted by the transmitting end through an antenna, converts an electric signal into an optical signal through a differential electro-optical converter and transmits the optical signal to the centralized processing end;
the centralized processing end receives an optical signal transmitted by a far end, a comparison threshold voltage waveform generated by a comparison threshold module of the transmitting end is utilized to obtain a signal value corresponding to a jump position of optical signal data, a sampling value is output, the sampling value is further converted into a single-bit high-speed signal, the single-bit high-speed signal is transmitted to the far end through an optical fiber, and the single-bit high-speed signal is converted into an electric signal by a differential electro-optic converter of the far end;
the remote end outputs a sampling value to a transmitting end after filtering the electric signal by a band-pass filter;
and the comparison threshold module of the transmitting end transmits the received sampling value to the far end, a comparator arranged in the far end is further utilized to compare the high-order modulation signal with the sampling value, and the centralized processing end further obtains the amplitude of the far end receiving the high-order modulation signal.
Further, when the positive input voltage of the data transition position is higher than the negative terminal, the optical signal is represented as 1, whereas the optical signal is represented as 0.
Further, the optical fiber is a bidirectional optical fiber.
Furthermore, the comparison threshold voltage waveform changes in real time according to the intensity of the high-order modulation signal.
Further, the comparison threshold voltage waveform may be a periodic sine wave or a sawtooth wave.
In a second aspect, the present invention provides a signal demodulation method, including the steps of:
the far end receives a high-order modulation signal of the transmitting end and inputs the high-order modulation signal to the voltage comparator;
the remote end converts the electric signal into an optical signal and transmits the optical signal to the centralized processing end through an optical fiber;
the centralized processing end generates a comparison threshold voltage waveform, and compares the high-order modulation signal with the comparison threshold voltage waveform;
the centralized processing end acquires a signal value corresponding to the position of a signal cross point of the high-order modulation signal and the comparison threshold voltage waveform, and acquires a sampling value of the high-order modulation signal;
the centralized processing end converts a sampling value of the high-order modulation signal into a single-bit high-speed signal, the single-bit high-speed signal is transmitted to a far end through an optical fiber, the single-bit high-speed signal is converted into an electric signal through an electro-optical converter at the far end, and the far end outputs the sampling value to a transmitting end after filtering the electric signal by a band-pass filter;
and the comparison threshold module of the transmitting end transmits the received sampling value to the far end, a comparator arranged in the far end is further utilized to compare the high-order modulation signal with the sampling value, and the centralized processing end further obtains the amplitude of the far end receiving the high-order modulation signal.
Further, the high order modulated signal is received through an antenna.
Furthermore, the comparison threshold voltage waveform changes in real time according to the intensity of the high-order modulation signal.
Further, the comparison threshold voltage waveform may be a periodic sine wave or a sawtooth wave.
In a third aspect, the present invention provides a computer storage medium comprising one or more computer programs stored in the computer storage medium and configured to be executed by the one or more processors, which when executing the computer programs implement the steps of performing the signal demodulation method provided in any one of the second aspects of the present invention.
The signal demodulation system, the signal demodulation method, the voltage comparator and the computer storage medium can directly collect and intensively process communication signals by using the optical fiber, so that the power consumption of a far-end receiver is greatly reduced, the complete synchronization of all the receivers can be ensured, and meanwhile, a high-order modulation signal is compared with a comparison threshold voltage waveform by using a periodic comparison threshold voltage waveform generated by a comparison threshold module at an intensively processing end, so that the effect of the multi-bit voltage comparator is virtualized, the demodulation of the high-order modulation signal is realized, and the signal demodulation system is suitable for the signal demodulation of the high-frequency tuning signal.
[ description of the drawings ]
FIG. 1: the invention discloses a signal demodulation system block diagram.
FIG. 2: the invention discloses a signal demodulation method flow chart.
FIG. 3: the present invention is a schematic diagram of a computer storage medium.
FIG. 4: the standard sinusoidal signal and the high-order modulation signal waveform of the embodiment of the invention are compared.
FIG. 5 is a schematic view of: the invention is illustrated in fig. 4 by the transition position of signal data.
FIG. 6: a signal data transition location diagram according to another embodiment of the present invention.
[ detailed description ] A
Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, and while the invention will be described in connection with the preferred embodiments, it will be understood by those skilled in the art that these embodiments are not intended to limit the invention to these embodiments, but on the contrary, the invention is intended to cover alternatives, modifications and equivalents, which may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in the following detailed description of the present invention, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, it will be apparent to those skilled in the art that the present invention may be practiced without these specific details, and in other instances, well-known methods, procedures, components and circuits have not been described in detail.
Referring to fig. 1, a block diagram of a signal demodulation system according to the present invention is shown, the signal demodulation system is composed of a transmitting end 10, a far end 20 and a centralized processing end 30, and the far end 20 and the centralized processing end 30 are connected by a bidirectional optical fiber. The RX + terminal of the far end 20 receives a high-order modulated signal through an antenna, and the antenna herein should be understood in a broad sense, and converts an electrical signal into an optical signal by using a differential electrical-to-optical converter (not shown in the figure) of a differential-to-single-ended unit, where the optical signal is represented as 1 when the positive input voltage is higher than the negative terminal, and the optical signal is represented as 0 otherwise.
The optical signal is transmitted to the centralized processing end 30 through the optical fiber, the centralized processing end 30 generates a binary 10-sequence bit stream and transmits the binary 10-sequence bit stream to the far end 20, the 10-sequence bit stream generates a comparison threshold voltage waveform at the centralized processing end 30 through a comparison threshold module of the transmitting end 10, the comparison threshold module of the transmitting end 10 can change in real time according to the strength of the high-order modulation signal, correspondingly, the comparison threshold voltage waveform generated at the centralized processing end 30 also changes continuously, and the comparison threshold voltage waveform here can be a periodic sine wave or a periodic sawtooth wave. The comparison threshold module of the transmitting terminal 10 is connected to the RX-terminal of the far end 20, and by generating a constantly changing comparison threshold voltage waveform, the comparator in the far end 20 compares the high-order modulation signal with different voltage amplitudes, so as to virtualize the effect of the multi-bit comparator and realize the demodulation of the high-order modulation signal.
At the centralized processing end 30, the collected 10-sequence bit stream is processed in a centralized manner, when 0 and 1 jump occurs, the generated comparison threshold voltage waveform amplitude and the input signal are interlaced, a sampling value is output according to a sine wave value corresponding to the acquired data jump position, the sampling value is further converted into a single-bit high-speed signal, the single-bit high-speed signal is transmitted to a far end through an optical fiber, an optical signal is converted into an electrical signal by using an electro-optical converter (not shown in the figure) of a single-end differential conversion unit at the far end, and the sampling value is further output to a transmitting end after being filtered by using a band-pass filter.
Since the comparison threshold voltage waveform in the technical scheme of the present invention is generated at the centralized processing terminal 30, the centralized processing terminal 30 can obtain the amplitude of the signal received by the far end 20 by comparing the comparison threshold voltage waveform with the data transition position of the high-order modulation signal.
Referring to fig. 2, a flowchart of a signal demodulation method according to the present invention includes the following steps:
and step 206, the far end filters the electric signal by using a band-pass filter and then transmits the output sampling value of the electric signal to the transmitting end, a comparison threshold module of the transmitting end transmits the received sampling value to the far end, a comparator arranged in the far end is further used for comparing the high-order modulation signal with the sampling value, and the centralized processing end further obtains the amplitude of the far end receiving the high-order modulation signal.
Particularly, the comparison threshold voltage waveform may change in real time according to the strength of the high-order modulation signal, and accordingly, the comparison threshold voltage waveform may also change continuously, where the comparison threshold voltage waveform may be a periodic sine wave or a periodic sawtooth wave.
The present invention also provides a voltage comparator, which directly collects and centrally processes signals at the centralized processing end 30 by using optical fibers, so that the power consumption of the remote receiver is greatly reduced, and the complete synchronization of the contents received by all the receivers can be realized.
Referring to fig. 3, the present invention also provides a computer storage medium 302, the computer storage medium 302 comprising one or more computer programs, the one or more computer programs being stored in the computer storage medium 302 and configured to be executed by the one or more processors 301, the processor 301 implementing the steps of a signal demodulation method as provided in fig. 2 of the present invention when executing the computer programs.
Referring to fig. 4 to 6, a comparison graph of the threshold voltage waveform and the high-order modulation signal waveform according to the embodiment of the present invention is shown in fig. 4, in which the dashed line waveform is the comparison threshold voltage waveform, the solid line is the high-order modulation signal waveform, and the intersection point of the two waveforms is the signal transition position; as further shown in fig. 5 and fig. 6, which are schematic diagrams of signal data transition positions according to an embodiment of the present invention, a vertical solid line of an intersection of a high-order modulation signal represented by a black line inclined upward in fig. 5 and a comparison threshold voltage waveform represented by a standard sinusoidal signal waveform represents a signal transition position, and in order to more intuitively and clearly illustrate the essence of the present invention, a signal transition position example shown in fig. 6 is further provided, an intersection of a high-order modulation signal represented by a black line inclined upward in fig. 6 and a comparison threshold voltage waveform represented by a standard sinusoidal signal waveform represents a high voltage and a low voltage, and is converted into a binary code 010101010101, a horizontal line in fig. 6 is a collected equivalent analog signal, and the analog signal can output an original demodulation signal after being filtered by a band-pass filter (not shown in the figure).
By adopting the signal demodulation system, the signal demodulation method, the voltage comparator and the computer storage medium, communication signals can be directly collected and processed in a centralized way by utilizing the optical fiber, so that the power consumption of a far-end receiver is greatly reduced, the complete synchronization of all the receivers can be ensured, meanwhile, a comparison threshold voltage waveform is generated at the centralized processing end by utilizing a comparison threshold module, and a high-order modulation signal is compared with different voltage amplitudes by utilizing the voltage comparator, so that the effect of the multi-bit voltage comparator is virtualized, the demodulation of the high-order modulation signal is realized, and the technical scheme of the invention is suitable for the signal demodulation of the high-frequency tuning signal.
In the embodiment of the present invention, it can be understood by those skilled in the art that all or part of the steps in the method for implementing the above embodiment may be implemented by instructing the relevant hardware through a program, where the program may be stored in a computer-readable storage medium, and the storage medium may include storage media such as ROM/RAM, magnetic disk, optical disk and the like, which are common to those skilled in the art.
Claims (10)
1. A signal demodulation system of a distributed receiver comprises a band-pass filter and a differential electro-optic converter, and is characterized by further comprising a transmitting end, a far end and a centralized processing end, wherein the far end and the centralized processing end are connected through an optical fiber;
the far end receives a high-order modulation signal transmitted by the transmitting end through an antenna, converts an electric signal into an optical signal through a differential electro-optical converter and transmits the optical signal to the centralized processing end;
the centralized processing end receives an optical signal transmitted by a far end, a comparison threshold voltage waveform generated by a comparison threshold module of the transmitting end is utilized to obtain a signal value corresponding to a jump position of optical signal data, a sampling value is output, the sampling value is further converted into a single-bit high-speed signal, the single-bit high-speed signal is transmitted to the far end through an optical fiber, the single-bit high-speed signal is converted into an electric signal by a differential electro-optical converter of the far end, and the electric signal is filtered by a band-pass filter and then the output sampling value is transmitted to the transmitting end by the far end;
and the comparison threshold module of the transmitting end transmits the received sampling value to the far end, a comparator arranged in the far end is further utilized to compare the high-order modulation signal with the sampling value, and the centralized processing end further obtains the amplitude of the far end receiving the high-order modulation signal.
2. The signal demodulation system of the distributed receiver as claimed in claim 1, wherein the optical signal represents 1 when the positive input voltage of the data transition position is higher than the negative terminal, and the optical signal represents 0 otherwise.
3. The signal demodulation system for a distributed receiver as set forth in claim 1, wherein said optical fiber is a bi-directional optical fiber.
4. The signal demodulation system of the distributed receiver as claimed in claim 1, wherein said comparison threshold voltage waveform varies in real time according to the intensity of the higher order modulated signal.
5. The signal demodulation system for a distributed receiver as set forth in claim 1 wherein said comparison threshold voltage waveform is a periodic sine wave or a sawtooth waveform.
6. A signal demodulation method, comprising the steps of:
the far end receives a high-order modulation signal of the transmitting end and inputs the high-order modulation signal to the voltage comparator;
the remote end converts the electric signal into an optical signal and transmits the optical signal to the centralized processing end through an optical fiber;
the centralized processing end generates a comparison threshold voltage waveform, and compares the high-order modulation signal with the comparison threshold voltage waveform;
the centralized processing end acquires a signal value corresponding to the position of a signal cross point of the high-order modulation signal and the comparison threshold voltage waveform, and acquires a sampling value of the high-order modulation signal;
the centralized processing end converts the sampling value of the high-order modulation signal into a single-bit high-speed signal, transmits the single-bit high-speed signal to a far end through an optical fiber, and converts the single-bit high-speed signal into an electric signal through an electro-optical converter at the far end;
the remote end filters the electric signal by a band-pass filter and then transmits an electric signal output sampling value to a transmitting end;
and the comparison threshold module of the transmitting end transmits the received sampling value to the far end, a comparator arranged in the far end is further utilized to compare the high-order modulation signal with the sampling value, and the centralized processing end further obtains the amplitude of the far end receiving the high-order modulation signal.
7. The signal demodulation method of claim 6 wherein the higher order modulated signal is received via an antenna.
8. The signal demodulation method of claim 6 wherein said comparison threshold voltage waveform varies in real time in response to the magnitude of the higher order modulated signal.
9. The method of claim 6, wherein the comparison threshold voltage waveform is a periodic sine wave or a sawtooth waveform.
10. A computer storage medium, characterized in that it comprises one or more computer programs, stored in said computer storage medium, and configured so as when executed by a processor to implement the steps of the signal demodulation method as provided in any one of claims 6 to 9.
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| CN201910889096.4A CN110611514B (en) | 2019-09-20 | 2019-09-20 | Signal demodulation system, method and computer storage medium for distributed receiver |
| PCT/CN2019/122293 WO2021051657A1 (en) | 2019-09-20 | 2019-12-01 | Signal demodulation system and method for distributed receiver, and computer storage medium |
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| CN201910889096.4A CN110611514B (en) | 2019-09-20 | 2019-09-20 | Signal demodulation system, method and computer storage medium for distributed receiver |
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| CN104362981A (en) * | 2014-08-27 | 2015-02-18 | 北京中电华大电子设计有限责任公司 | Synchronous sampling demodulation method and circuit |
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- 2019-12-01 WO PCT/CN2019/122293 patent/WO2021051657A1/en active Application Filing
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| EP1271303A1 (en) * | 2001-06-22 | 2003-01-02 | STMicroelectronics S.r.l. | A binary number comparator |
| CN103391261A (en) * | 2012-05-09 | 2013-11-13 | Nxp股份有限公司 | Equipment and method of capacitive isolated voltage domain communication |
| CN202837534U (en) * | 2012-10-24 | 2013-03-27 | 中国电子科技集团公司第三十八研究所 | Distributed receiver and external active calibration device using same |
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| WO2019153049A1 (en) * | 2018-02-08 | 2019-08-15 | Bae Systems Australia Limited | Multichannel software defined radio receiver with optically isolated adc |
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| CN110611514A (en) | 2019-12-24 |
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