Method for synthesizing multiple signals with joint attenuation ability

Abstract

The invention provides a method for synthesizing multiple signals with joint attenuation ability. The method comprises the following steps of: in combination with the characteristics of signal reception in the actual working state of an underwater navigation body, inputting a target echo signal parameter, a background noise signal parameter and a reverberation signal parameter to be simulated into an IPC (industrial personal computer); synthesizing multiple signals (such as background noise, reverberation and target echo) by software; and then performing D / A (digital / analogue) conversion and amplitude attenuation. The method ensures that the synthesized signal meets the detection requirements of a self-navigation system of the underwater navigation body without exceeding the D / A output range, ensures that multiple signals of the same path share the D / A conversion and amplitude attenuation circuit, greatly reduces the hardware scale, and reduces the volume of the equipment which is then convenient to use and transport.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a multi-signal synthesizing method with common attenuation capability, which is used for supporting equipment of an underwater vehicle self-guidance system. Background technique [0002] The target simulator is a kind of test equipment used in conjunction with the self-guidance system of the underwater vehicle. Simulate various signals such as reverberation, ship radiation noise, target echo and artificial interference. In order to truly simulate the signals received by the underwater vehicle self-guidance system in different working stages, it is necessary to synthesize multiple signals of the same channel (such as background noise, reverberation and target echo) according to a certain signal-to-noise ratio and simultaneously output. When the signal is synthesized, there is a large difference between the smallest signal and the largest signal amplitude, and generally...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems in the prior art that the hardware synthesis method is adopted for multiple signals of the same channel, resulting in complex hardware circuits, increased costs, reduced reliability, and increased volume, the present invention proposes a multiple The signal synthesis method, combined with the characteristics of the received signal under the actual working state of the underwater vehicle, uses software to complete the synthesis of various signals (such as background noise, reverberation and target echo), and then performs D / A conversion and amplitude attenuation. Ensure that the synthesized signal not only meets the detection requirements of the underwater vehicle self-guidance system, but also does not exceed the output range of the D / A, and ensures that multiple signals of the same channel share the D / A conversion and amplitude attenuation circuit, which greatly reduces the hardware scale and reduces the The volume of the equipment is convenient to use and transport

Images