Channel recording method and device based on 5G operation signal, medium and terminal
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A channel and signal technology, applied in the field of mobile communication, can solve problems such as interference
Active Publication Date: 2021-12-10
BEIJING JIAOTONG UNIV
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Problems solved by technology
However, in the existing technology, it is necessary to transmit the detection signal by itself for channel recording. Since the detection signal and the actual operation signal are in the same frequency band, it is easy to interfere with the actual operation signal of the surrounding cells.
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no. 1 example
[0074] figure 1 It is a flowchart of a channel recording method based on 5G operating signals provided by an embodiment of the present invention. Such as figure 1 As shown, the method is applied to a user terminal and at least includes the following steps:
[0075] S101. Search and obtain a synchronization signal block (SSB) from the intercepted 5G operation signal;
[0076] S102. Obtain a primary synchronization signal and a secondary synchronization signal from the SSB;
[0077] S103. Demodulate the PSS and SSS to obtain a physical cell identity (PCI);
[0078] S104. Determine the frequency domain position of the demodulation reference signal of the PBCH according to the physical cell identity (PCI); blindly decode the DM-RS in the PBCH according to the frequency domain position of the DM-RS, and obtain the position index of the synchronization signal block and half-frame information, In order to achieve half-frame synchronization;
[0079] S105. Decode the PBCH to ob...
no. 2 example
[0174] like Figure 5 As shown, the second embodiment of the present invention provides a channel recording device based on 5G operating signals. The channel recording device 300 is set on the user terminal, including:
[0175] The synchronous signal block search module 310 is used to search and obtain the synchronous signal block from the intercepted 5G operation signal;
[0176] A synchronization signal obtaining module 320, configured to obtain a primary synchronization signal and a secondary synchronization signal from the synchronization signal block;
[0177] A physical cell identifier determining module 330, configured to demodulate the primary synchronization signal and the secondary synchronization signal to obtain a physical cell identifier;
[0178] The physical broadcast channel decoding module 340 is configured to determine the frequency domain position of the demodulation reference signal (DM-RS) of the physical broadcast channel (PBCH) according to the physica...
no. 3 example
[0186] The third embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, any channel recording method based on 5G operating signals as described above is implemented.
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Abstract
The invention discloses a channel recording method and device based on a 5G operation signal, a medium and a terminal. The channel recording method comprises the following steps: searching and acquiring a synchronization signal block from a monitored 5G operation signal; acquiring a primary synchronization signal and a secondary synchronization signal from the synchronization signal block, and determining a frequency domain position of a demodulation reference signal of a physical broadcast channel; blind decoding the demodulation reference signal in the physical broadcast channel according to the frequency domain position of the demodulation reference signal to realize half-frame synchronization; decoding the physical broadcast channel to obtain a system message so as to realize frame synchronization; monitoring a search space of the physical downlink control channel to decode the physical downlink control channel to obtain downlink control information; and obtaining a demodulation reference signal in the physical downlink shared channel and carrying out channel estimation to obtain channel information. According to the invention, a detection signal does not need to be transmitted, the 5G operation signal is directly recorded, and normal operation of a 5G communication network is not interfered.
Description
technical field [0001] The invention relates to a channel recording method based on 5G operation signals, and also relates to a corresponding channel recording device, a computer-readable storage medium and a user terminal, belonging to the technical field of mobile communication. Background technique [0002] Channel recording is also called channel measurement or channel detection. The principle is that the transmitter sends a known training signal, the receiver stores the received signal, and then estimates the wireless channel information through the known sent signal to determine the channel impulse response (Channel Impulse Response) , abbreviated as CIR) or channel frequency domain response. A transmitter and a receiver for channel measurement constitute a channel measurement system. [0003] As a new generation of mobile communication network, 5G combines primary synchronization signal (PSS), secondary synchronization signal (SSS) and physical broadcast channel (PBC...
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