A receiving channel gain automatic control method and device

Abstract

The invention discloses a method for automatically controlling receiving channel gains and a device. The method includes the steps that the receiving-end device calculates receiving channel gain adjustment values corresponding to antenna receiving channels through receiving signals corresponding to the antenna receiving channels; the receiving-end device selects the receiving channel gain adjustment value with the minimum absolute value from the receiving channel gain adjustment values corresponding to the antenna receiving channels; the receiving-end device determines the receiving channel gains currently corresponding to the receiving channel gain adjustment value with the minimum absolute value; the receiving-end device sets the receiving channel gains of the antenna receiving channels to be the receiving channel gains currently corresponding to the receiving channel gain adjustment value with the minimum absolute value; the receiving-end device carries out corresponding adjustment on the receiving channel gains of the antenna receiving channels through the receiving channel gain adjustment value with the minimum absolute value. By means of the method and the device, huge time-frequency resource waste and huge service face transmission delay can be avoided.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a receiving channel gain automatic control method and equipment. Background technique [0002] The technical characteristics of the Internet of Vehicles based on TDMA (Time Division Multiple Access) technology include: (1) Vehicles are synchronized by GNSS (Global Navigation Satellite System, Global Navigation Satellite System) and divided based on GNSS timing Time slot, each vehicle occupies a time-frequency resource of a time slot independently, and different users use different time slots; (2) 2 antennas are used for reception; (3) when the vehicle sends information, the range that needs to be covered is up to 300 meters, The closest distance to the adjacent car is 2 meters, and the dynamic range of the received signal is relatively large; (4) Due to the strong mobility of the car and the rapid change of the network topology, it is impossible to predict the dist...

AI Technical Summary

Problems solved by technology

[0006] Because when the gain of the receiving channel is too large, the data after the ADC (Analog to Digital Converter, analog-to-digital converter) will be saturated. If the gain of the receiving channel is too small, the signal will be submerged in the noise, and the distorted digital signal cannot estimate the accurate receiving channel. Therefore, in TDMA-based Internet of Vehicles communication and D2D communication of LTE cellular network, due to the rapid change of received signal power, the receiving end device cannot know the possible received signal power, so the current adjustment of the receiving channel gain is a repeated process. In the process, only after multiple adjustments can the appropriate receiving channel gain be adjusted to enter the ADC, resulting in a large waste of time-frequency resources and a large transmission delay on the service plane

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