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Incoherent re-sampling device

A resampling and non-coherent technology, applied in the communication field, can solve the problems of fewer chips, high power consumption, and complex structure, and achieve low cost, low power consumption, and good performance.

Inactive Publication Date: 2013-11-20
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

[0002] Sampling rate conversion is a method to change the processing rate of digital signals. It plays an important role in communication engineering. When there are multiple communication rates or different sources of processing clocks in the system, the rate can be normalized through sampling rate conversion. In the previous design, the sampling rate conversion can only be realized by analog components or dedicated chips composed of AD and DA. The structure is complex, the power consumption is large, and there are fewer chips that can be selected.

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Embodiment Construction

[0014] refer to Figure 1 to Figure 3 , the present invention includes a data cache unit 1, an interpolation filter unit 2, and a clock adjustment unit 3. figure 1 It is a principle block diagram of the present invention, and the embodiment is according to figure 1 Connect the lines. Among them, the function of the data cache unit 1 is to store data of a certain length, the function of the interpolation filter unit 2 is to interpolate and filter the input data, and the function of the clock adjustment unit 3 is to generate a clock phase detection signal, and calculate the position to be interpolated according to the error .

[0015] The interpolation filtering unit 2 of the present invention is composed of a filter coefficient table module 4 and a convolution module 5 . figure 2 It is the electrical schematic diagram of the interpolation filtering unit 2, and the embodiment is according to figure 2 Connect the lines. The function of the filter coefficient table module 4...

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Abstract

The invention discloses an incoherent re-sampling device, and relates to sampling rate conversion technology in the communication field. The incoherent re-sampling device comprises a data caching unit (1), an interpolation filtering unit (2) and a clock adjustment unit (3). Different frequency control words are set and address signals sent by the clock adjustment unit are utilized to search the temporal relation between input samples and output samples, and the sampling rate conversion purpose is realized after interpolation filtering. As the re-sampling and low-pass filtering integrated design is adopted, compared with the traditional realization method of re-sampling technology, the incoherent re-sampling device provided by the invention has the advantages of easiness in realization, stable and reliable performance, non-linear distortion prevention and the like, and is particularly suitable for input and output sampling rate conversion in a communication system.

Description

technical field [0001] The invention relates to a non-coherent resampling device in the field of communication, and is especially suitable for transforming the sampling rate in the communication system. Background technique [0002] Sampling rate conversion is a method to change the processing rate of digital signals. It plays an important role in communication engineering. When there are multiple communication rates or different sources of processing clocks in the system, the rate can be normalized through sampling rate conversion. In the previous design, the sampling rate conversion can only be realized by analog components composed of AD and DA or a dedicated chip, which has a complex structure, high power consumption, and fewer chips that can be selected. Using non-coherent digital resampling technology to realize the conversion of various communication rates has important application value. Contents of the invention [0003] The object of the present invention is to ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03L7/18
Inventor 潘申富王赛宇陈敬乔张静
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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