Efficient high-bit rate signal bit error rate test method

Abstract

The invention discloses an efficient high-bit rate signal bit error rate test method. The method comprises the following steps that: step 1, a satellite transmits high-bit rate data signals, and the high-bit rate data signals are connected with a noise source, after noises are added to the high-bit rate data signals by the noise source, output power is divided into two paths, wherein one path is connected with a spectrum analyzer so that the spectrum analyzer can measure a spectrum and a signal to noise ratio, and the other path is connected with a high-bit rate demodulation device so that the high-bit rate demodulation device can perform demodulation; and step 2, error rate test software is enabled, the number of the measurement times of the software is set to be N, and the number of the measurement times is a ratio of time when the satellite transmits the data to singe measurement time, and the range of the output power of the noise source is set, and the range can be set according to the power of the transmitted signals, and N is a natural number. With the method of the invention adopted, bit error rate-signal to noise ratio curve calibration time is greatly shortened, and a bit error rate curve can be accurately calibrated.

Description

technical field [0001] The invention relates to a method for testing the bit error rate of a satellite ground, in particular to an efficient method for testing the bit error rate of a signal with a high bit rate. Background technique [0002] With the increasing demand of users, the amount of satellite load data is gradually increasing, and the design of the downlink becomes complicated, including high downlink code rate, etc. In addition to the quality of the channel, the design of the spreading code is also of great significance , a good spread spectrum pattern, its anti-noise performance is also good, and the bit error rate of the downlink data is low. [0003] When the satellite downlink transmits high-bit rate data signals, when the signal is added with noise, the constellation diagram of the signal received by the receiver equipment becomes spurious, and the demodulated data has bit errors, but this phenomenon is not linear , but has a specific mathematical curve, and...

AI Technical Summary

Problems solved by technology

[0003] When the satellite downlink transmits high-bit rate data signals, when the signal is added with noise, the constellation diagram of the signal received by the receiver equipment becomes spurious, and the demodulated data has bit errors, but this phenomenon is not linear , but has a specific mathematical curve, and this bit error rate characteristic curve is determined by the modulation code type. If the satellite modulator and coding equipment work abnormally, or the signal transmission channel is abnormal, the output code type will be unsatisfactory. The measured bit error rate characteristic curve will be very different from the theoretical curve

Images