Error rate test system based on Bayes theorem

Abstract

The invention disclose a bit error rate (BER) testing system based on the Bayes rule, which consists of a clock unit, an m sequencer, an information output unit, an information receiving unit, a sequence synchronizing and threshold detecting unit, a bit error statistical unit, a BER estimating unit, a bit synchronous clock extracting unit and a local m sequencer. A BER estimating method based on the Bayes rule estimates the range of the BER by utilizing the statistical confidence level principle, simultaneously, posterior probability distribution is adopted to substitute normal distribution so as to be similar to a statistical model of a true BER, the posterior probability distribution of the bit error rate is calculated in real time so as to estimate the BER effectively and accurately according to the actually tested bit error points, and the optimal testing time is selected. The system meets the requirement that the BER of a communication system is estimated by the estimated confidence level in a possibly short time in the practical engineering application of a full optical fiber digital clinometer.

Description

technical field [0001] The invention relates to a testing method for bit error rate, more particularly, a testing system for bit error rate based on Bayes rule, which is suitable for all-fiber digital inclinometer. Background technique [0002] Publication number CN 1932238A discloses an all-fiber digital inclinometer, which consists of a central processor 1, a signal processor 2, a counter 3, an optical cable winch 4, a tension sensor 5, a derrick 6 and a downhole probe. Tube 10; the central processor 1 is connected to the signal processor 2 through the RS232 interface, the optical cable winch 4 is connected to the signal processor 2 through a cable, the counter 3 is installed on the optical cable winch 4, the optical cable is wound on the optical cable winch 4, and the derrick 6 Placed above the wellhead to be measured, a tension sensor 5 is installed on the derrick 6, and one end of the optical cable is connected to one end of the downhole probe 10 through the tension sen...

AI Technical Summary

Problems solved by technology

However, in different measurement tasks, the optical cables / cables connected with the inclinometer are not fixed, and the transmission performance of different optical cables / cables will vary greatly due to their old and new or different models; at the same time, the measured wells are not fixed, different There are also great differences in the downhole environment of

In view of the above reasons, in order to avoid useless trajectory measurement when the bit error rate is too high, resulting in waste of manpower and material resources, the all-fiber digital inclinometer must perform a bit error rate test before each work

[0004] When performing bit error rate testing, the actual measured bit error rate is a theoretical estimate, and the measurement accuracy depends on the total number of bits transmitted. To make the measurement result accurate enough, a sufficient number of bits must be transmitted, which means that the Takes a lot of measurement time

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