Channel delay simulation device and method

Abstract

The invention is applicable to the technical field of signal processing, and provides a channel delay simulation device and method. The channel delay simulation device comprises a data input module, a delay input module, a control scheduling module, a cache module, a cache interface module, a fractional delay filter and an output module; and the control scheduling module divides the channel delay into a first delay and a second delay according to the period of a sampling clock, wherein the first delay and the second delay are respectively an integer part and a fraction part of the channel delay relative to the period of the sampling clock, controls the cache interface module to write input data into the cache module for caching according to the first delay to obtain first delay data, and controls the fractional delay filter to process the first delay data according to the second delay to obtain second delay data. According to the channel delay simulation device provided by the invention, on the premise of maintaining the existing storage resources, higher channel delay accuracy can be achieved.

Description

technical field [0001] The invention belongs to the technical field of signal processing, and in particular relates to a channel delay simulation device and method. Background technique [0002] In the communication simulation system, it is usually necessary to simulate the channel delay. For example, in the satellite navigation signal simulation system, it is necessary to simulate the effect of the channel delay between the satellite and the user. The channel delay device is based on the original signal. To achieve the effect of delay by caching, the amount of delay can be adjusted by adjusting the depth of the cache. [0003] In the prior art, in order to improve the precision of the channel delay, it is often necessary to increase the frequency of the cached sampling clock. The higher the precision required, the higher the sampling frequency is required, and the amount of cached data is also continuously increasing, resulting in a large amount of storage resource consump...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides a channel delay simulation device and method to solve the problem of massive consumption of storage resources caused by increasing the sampling frequency of the buffer to improve the channel delay accuracy in the prior art

Images