A Precise Synchronization and Triggering Method for Parallel Multi-Channel Channel Test Equipment

Abstract

The invention provides a precise synchronizing and triggering method for parallel multi-channel communication channel testing equipment. The method comprises the following steps: choosing a main channel out of a plurality of channels wherein each channel awaits to receive a first rising edge of the synchronization pulse emitted from the main channel until the first rising edge is received; in the period after the first rising edge of the synchronization pulse, detecting the time difference by each channel between the first rising edge of a common synchronization pulse clock and the first rising edge of a common triggering reference clock; according to the time difference, automatically aligning the phases of the sampling clock and the common triggering reference clock of all channels; and along the descending edge of the common triggering reference clock and when the triggering signal emitted from the main channel is transmitted to all channels and is detected, executing signal generating or signal capturing coincidently at all channels along the rising edge of the next common triggering reference clock. According to the invention, through a modularized instrument and a modularized apparatus bus structure, it is possible to reach ps grade synchronization precision.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a precise synchronization and trigger method for parallel multi-channel channel test equipment. Background technique [0002] Multiple-Input Multiple-Output MIMO (Multiple-Input Multiple-Output MIMO) technology refers to the use of multiple transmitting antennas and receiving antennas at the transmitting end and receiving end, so that signals are transmitted and received through multiple antennas at the transmitting end and receiving end, thereby improving communication quality. MIMO technology can make full use of space resources and realize multiple transmissions and multiple receptions through multiple antennas. Without increasing spectrum resources and antenna transmission power, it can double the system channel capacity and has obvious advantages. Therefore, it is regarded as the next generation The core technology of mobile communication. The test equipment...

AI Technical Summary

Problems solved by technology

[0007] (1) It cannot be fully applied to the synchronization between multiple channels;

[0008] (2) More attention is paid to starting at the same time, and the phase consistency of the synchronous channel is not strictly considered;

[0009] (3) Due to the limitation of openness and discreteness based on traditional instrument integration, the accuracy is generally at the ms level, which cannot reach the required accuracy

[0010] The complexity of synchronizing multiple RF channels is that each RF channel can work under different sampling clocks, so how to make all the sampling clocks start at the same point will become a challenge; the second difficulty lies in the synchronization accuracy, how to make the channels It has also become a hot topic to achieve the ps-level precision of inter-synchronization

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