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Port detection method, system and terminal

A port detection and port technology, applied in the communication field, can solve the problems of increasing decoding complexity, poor detection performance, and inability to obtain the number of antenna ports.

Active Publication Date: 2019-07-12
INNO INSTR (CHINA) INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the design of the 3GPP.36.211 protocol, the information of the number of transmitting ports of the antenna is hidden in the CRC mask (mask of the cyclic redundancy check) of the original bit of the PBCH channel; that is to say, before the PBCH channel is correctly detected, the system cannot Get the information of the number of antenna ports in the CRC mask
[0004] In existing terminals, it is usually attempted to decode the PBCH channel using three transmission antenna port numbers, such as 1, 2, and 4, until the PBCH is decoded correctly. The decoding process can be correctly decoded, which has a considerable amount of calculation, which is not conducive to the requirements of engineering practice
[0005] In addition, in some instrument designs or special-purpose terminal designs, the system may not include the process of unpacking PBCHMIB, so it becomes a practical requirement to use non-UE identification ports; in the existing technology, the main idea is to use The receiving power of the CRS (Cell Reference Information) information of each port is judged. This scheme can correctly detect the port of the transmitter in the environment of high signal-to-noise and low frequency selectivity; in the case of low signal-to-noise ratio and fading Under the scene, the detection performance is poor

Method used

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  • Port detection method, system and terminal
  • Port detection method, system and terminal
  • Port detection method, system and terminal

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Embodiment 2

[0099] In this embodiment, a port detection system is provided, and the port detection system is used to implement the port detection method in the above preferred implementation manner. The port detection system can be implemented based on processors and other devices, and includes a port detection module. The port detection module specifically has the following functional units to achieve the effect of determining the number of ports.

[0100]Channel estimation unit: used to perform channel estimation on each port, and obtain frequency-domain channel estimation information of each port; specifically, the channel estimation unit can obtain the time-domain position and frequency-domain position of the pilot symbol based on the cell search process, and Extract valid pilot symbol information. And channel estimation is performed based on the time domain position and the frequency domain position of the pilot symbols. As an auxiliary function, filtering and noise reduction proces...

Embodiment 3

[0104] This embodiment provides a terminal, which includes the port detection system in Embodiment 2 above. It can be applied to the UE side of the communication system or in instruments and meters. For details, refer to Figure 5 and Figure 6 .

[0105] Figure 5 What is shown is a schematic diagram of the application of the port detection system on the LTE UE side system. The receiver signal can obtain frame timing information, PCI information and CP type information through the cell search process; then use the port detection module to identify the number of ports used by the transmitter; use the port information to select an appropriate channel estimation and equalization scheme, and analyze the PBCH channel Obtain MIB information. It can be seen from the figure that there is no need to use three types of ports to try to solve the PBCH at this time.

[0106] Figure 6 Shown is the schematic diagram of the application of the port detection system in the instrument. ...

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Abstract

The invention provides a port detection method, which comprises the following steps of: carrying out channel estimation on each port to obtain frequency domain channel estimation information of each port; calculating time domain information of pilot signals of each port based on the frequency domain channel estimation information, wherein the time domain information comprises time domain signal power; taking the maximum value of the time domain signal power of each port, and presetting a first judgment value and a second judgment value; and comparing the maximum value of the time domain signalpower of each port with the first judgment value and the second judgment value to determine the number of the communication ports. The port detection system comprises a channel estimation unit, a time domain frequency calculation unit and a port number judgment unit. Time domain signal power characteristic information estimated by different port channels is used for detecting port information ofa transmitter, time domain characteristics are estimated by different port pilot channels, detection of an antenna port is completed, the method is simple and effective, and a good port detection effect is obtained in a low signal to noise ratio and fading scene.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a port detection method, system and terminal. Background technique [0002] MIMO technology is a mobile communication technology with high communication efficiency. Taking LTE communication system as an example, because it adopts advanced OFDM (Orthogonal Frequency Division Multiplexing) technology and MIMO (Multiple Input Multiple Output) technology to provide users with faster and higher experience rate, it has become the mainstream technology in the communication market. LTE system supports multi-port transmission technology, such as beamforming technology for PDSCH channel, and physical broadcast channel (PBCH) supports transmit diversity mode; PBCH channel supports transmit diversity modes of 1, 2, and 4 ports for adapting Different practical application scenarios to obtain better cell coverage indicators. [0003] In the LTE system, during the initial cell access proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/327H04L25/02
CPCH04L25/0202H04B17/327
Inventor 赵阳日
Owner INNO INSTR (CHINA) INC