CN114189289B - Terahertz signal rapid synchronization method - Google Patents
Terahertz signal rapid synchronization method Download PDFInfo
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- CN114189289B CN114189289B CN202111420781.6A CN202111420781A CN114189289B CN 114189289 B CN114189289 B CN 114189289B CN 202111420781 A CN202111420781 A CN 202111420781A CN 114189289 B CN114189289 B CN 114189289B
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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
- H04B10/90—Non-optical transmission systems, e.g. transmission systems employing non-photonic corpuscular radiation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/0079—Receiver details
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a terahertz signal quick synchronization method, which belongs to the technical field of terahertz, and comprises the steps of performing IFFT operation on a demodulation reference signal (DMRS) sequence to convert the demodulation reference signal (DMRS) sequence into a time domain, performing downsampling on the time domain signal under the condition of meeting the Nyquist sampling rate, performing extraction and filtering on the received time domain signal under the same sampling rate, and finally performing time domain sliding correlation operation on the two time domain signals to obtain peak points to realize synchronization. The invention can rapidly synchronize the terahertz signals, and meets the requirement of carrying out real-time demodulation analysis on the terahertz signals with large bandwidth and high speed.
Description
Technical Field
The invention belongs to the technical field of terahertz, and particularly relates to a terahertz signal synchronization method.
Background
In future 6G communication, the terahertz communication technology and other low-frequency band networks are used for fusion networking, so that space-sky-sea multidimensional integrated communication can be realized.
In terahertz communication, the signal bandwidth is not less than 100GHz, and how to rapidly synchronize such a large-bandwidth signal for subsequent signal processing is critical to terahertz communication.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a terahertz signal rapid synchronization method which is reasonable in design, overcomes the defects in the prior art and has good effect.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a terahertz signal rapid synchronization method comprises the following steps:
step 1: operating the frequency domain demodulation reference signal sequence, and performing m times downsampling to obtain y rec,fs ；
Step 2: the baseband signal y is downsampled m times, and then filtered by a low-pass filter to obtain y rec,f ；
Step 3: let t dmrs,fs And y is rec,f Performing sliding operation to obtain peak valueAnd the point delta is expanded by m times to be the synchronization point of the original signal.
Preferably, in step 1, the method specifically comprises the following steps:
step 1.1: generating a frequency domain demodulation reference signal sequence according to a Cell ID;
step 1.2: performing IFFT operation on the frequency domain demodulation reference signal sequence in the step 1.1 to obtain t dmrs ；
Step 1.3: under the condition of meeting the Nyquist sampling theorem, for t dmrs The signal is downsampled m times to obtain a signal t dmrs,fs 。
Preferably, in step 2, the method specifically comprises the following steps:
step 2.1: down-sampling the received baseband signal m times to obtain y rec,fs ；
Step 2.2: designing a sum t dmrs,fs Low pass filter of equal bandwidth, will y rec,fs Through the low pass filter, y is obtained rec,f 。
Preferably, in step 3, the method specifically comprises the following steps:
step 3.1: let t dmrs,fs And y is rec,f Performing sliding operation to obtain a peak point delta;
step 3.2: and expanding delta by m times to obtain a synchronization point of the original signal, wherein the final synchronization point is m.
The invention has the beneficial technical effects that:
the method disclosed by the invention is based on a terahertz signal processing platform, and the problem of quick synchronization in a terahertz communication system is solved by utilizing downsampling DMRS sliding correlation.
Drawings
FIG. 1 is a flow chart of a method for fast synchronization of Hertz signals according to the present invention;
Detailed Description
The invention is described in further detail below with reference to the attached drawings and detailed description:
a terahertz signal rapid synchronization method, the flow of which is shown in figure 1, comprises the following steps:
step 1: performing IFFT (Inverse Fast Fourier Transform ) operation on a frequency domain demodulation reference signal (DMRS) sequence to obtain t dmrs . Under the condition of meeting the Nyquist sampling theorem, let t be favorable dmrs The signal is downsampled m times to obtain a signal t dmrs,fs ；
The method specifically comprises the following steps:
step 1.1: generating a DMRS sequence according to Cell ID (Cell identification);
step 1.2: performing IFFT operation on the sequence in the step 1.1 to obtain t dmrs ；
Step 1.3: under the condition of meeting the Nyquist sampling theorem, let t be favorable dmrs The signal is downsampled m times to obtain a signal t dmrs,fs ；
Step 2: downsampling the received time domain signal y by m times to obtain y rec,fs . Designing a sum t dmrs,fs Low pass filter of equal bandwidth, will y rec,fs Through the low pass filter, y is obtained rec,f ；
The method specifically comprises the following steps:
step 2.1: the received time domain signal is subjected to m times downsampling to obtain y rec,fs ；
Step 2.2: designing a sum t dmrs,fs Low pass filter of equal bandwidth, will y rec,fs Through the low pass filter, y is obtained rec,f ；
Step 3: let t dmrs,fs And y is rec,f And performing sliding correlation operation to obtain a peak point delta, and expanding the delta by m times to obtain a synchronization point of the original signal.
The method specifically comprises the following steps:
step 3.1: let t dmrs,fs And y is rec,f Performing sliding correlation operation to obtain a peak point delta;
step 3.2: the final synchronization point is m×δ.
It should be understood that the above description is not intended to limit the invention to the particular embodiments disclosed, but to limit the invention to the particular embodiments disclosed, and that the invention is not limited to the particular embodiments disclosed, but is intended to cover modifications, adaptations, additions and alternatives falling within the spirit and scope of the invention.
Claims (1)
1. A terahertz signal rapid synchronization method is characterized by comprising the following steps of: the method comprises the following steps:
step 1: operating the frequency domain demodulation reference signal sequence, and performing m times downsampling to obtain y rec,fs ；
Step 2: the baseband signal y is downsampled m times, and then filtered by a low-pass filter to obtain y rec,f ；
Step 3: let t dmrs,fs And y is rec,f Performing sliding operation to obtain a peak point delta, and expanding the delta by m times to obtain a synchronization point of an original signal;
in step 1, the method specifically comprises the following steps:
step 1.1: generating a frequency domain demodulation reference signal sequence according to a Cell ID;
step 1.2: performing IFFT operation on the frequency domain demodulation reference signal sequence in the step 1.1 to obtain t dmrs ；
Step 1.3: under the condition of meeting the Nyquist sampling theorem, for t dmrs The signal is downsampled m times to obtain a signal t dmrs,fs ；
In step 2, the method specifically comprises the following steps:
step 2.1: down-sampling the received baseband signal m times to obtain y rec,fs ；
Step 2.2: designing a sum t dmrs,fs Low pass filter of equal bandwidth, will y rec,fs Through the low pass filter, y is obtained rec,f ；
In step 3, the method specifically comprises the following steps:
step 3.1: let t dmrs,fs And y is rec,f Performing sliding operation to obtain a peak point delta;
step 3.2: and expanding delta by m times to obtain a synchronization point of the original signal, wherein the final synchronization point is m.
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| CN107105497A (en) * | 2017-06-07 | 2017-08-29 | 重庆重邮汇测通信技术有限公司 | Master sync signal detection method in a kind of LTE system |
| WO2021098612A1 (en) * | 2019-11-21 | 2021-05-27 | Oppo广东移动通信有限公司 | Signal synchronization method and apparatus, and computer storage medium |
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| WO2017174003A1 (en) * | 2016-04-08 | 2017-10-12 | 深圳超级数据链技术有限公司 | Timing synchronization method and device |
| CN108092929B (en) * | 2017-12-27 | 2020-07-28 | 北京理工大学 | Synchronization method for terahertz communication |
| CN109782283A (en) * | 2019-03-13 | 2019-05-21 | 昆山煜壶信息技术有限公司 | Millimetre-wave radar imaging method based on premodulated AIC |
| CN111049772B (en) * | 2019-12-20 | 2023-09-29 | 上海创远仪器技术股份有限公司 | System and method for realizing 5G signal synchronous processing applied to vector signal analyzer platform |
| CN113133021A (en) * | 2019-12-31 | 2021-07-16 | 中兴通讯股份有限公司 | Method, device, equipment and storage medium for detecting and transmitting synchronous signal |
| CN112039811B (en) * | 2020-07-01 | 2023-06-30 | 武汉梦芯科技有限公司 | Calculation method in time-frequency synchronization process |
| CN112866160B (en) * | 2020-12-30 | 2023-09-01 | 中电科思仪科技(安徽)有限公司 | Method and device for analyzing high-order modulation OFDMA-WLAN signal under large bandwidth |
| CN113381805B (en) * | 2021-06-10 | 2023-02-03 | 青岛兴仪电子设备有限责任公司 | TOSA bandwidth rapid measurement device and method based on vector network analyzer |
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|---|---|---|---|---|
| WO2017036325A1 (en) * | 2015-09-02 | 2017-03-09 | 华为技术有限公司 | Signal synchronization method and device |
| CN107105497A (en) * | 2017-06-07 | 2017-08-29 | 重庆重邮汇测通信技术有限公司 | Master sync signal detection method in a kind of LTE system |
| WO2021098612A1 (en) * | 2019-11-21 | 2021-05-27 | Oppo广东移动通信有限公司 | Signal synchronization method and apparatus, and computer storage medium |
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