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Method for resampling at transmission and reception of a digital signal with digital band translation

A frequency band conversion and digital signal technology, applied in digital-to-analog converters, analog-to-digital converters, analog-to-digital conversion, etc., can solve problems such as complexity, high filter operating frequency, and expensive implementation, and achieve maximum flexibility and work The effect of frequency simplification

Active Publication Date: 2006-09-06
MARVELL HISPANIA SL SOC UNIPERSONAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Perhaps the most prominent of the major disadvantages is the size and complexity of the interpolation filters required for bandpass signal resampling
Additional disadvantages include the fact that the filter operates at such a high frequency that it is very expensive to implement

Method used

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  • Method for resampling at transmission and reception of a digital signal with digital band translation
  • Method for resampling at transmission and reception of a digital signal with digital band translation
  • Method for resampling at transmission and reception of a digital signal with digital band translation

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Embodiment Construction

[0026] Embodiments of the present invention will now be described with reference to the numerals employed in the drawings.

[0027] In most communication systems the signal is transmitted in the passband, in other words it occupies a frequency range which does not include the zero frequency. To facilitate the implementation of the electronics required for transmitting and receiving signals, the signals are processed internally in the baseband, in other words in the frequency range including zero, and then converted back to the passband during transmission. When receiving, the reverse process is performed.

[0028] Additionally, in digital communication systems, there is always an error between the sampling frequencies of the DAC and ADC converters used for transmission and reception, respectively. If the error is larger than the telecommunication system to which it is applied, then correction is required, and one technique that can be used is resampling, which consists of usi...

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Abstract

The procedure carries out a resampling (25) in reception of a band-pass signal in which the signal is translated (4) to base-band with a configurable frequency and the resulting base-band signal is introduced into a decimator (5). Likewise, a resampling is carried out in transmission (26) where the base-band signal is interpolated (10) in order to be later on translated to band-pass (20) with a configurable frequency. The procedure permits correction of the frequency error introduced by digital-analog (11) and analog-digital (1) converters. Moreover, the proposed unit made up of band translation and resampling permits the complexity of the interpolation filters used for generating new samples of the digital signal to be simplified.

Description

[0001] purpose of invention [0002] As stated in the title of this technical description, the present invention relates to a method of resampling when transmitting and receiving digital band-converted digital signals, which enables the correction of the The frequency error is corrected. [0003] The method of the present invention simplifies the electronics required to perform resampling in the bandpass signal. Background technique [0004] In most telecommunication systems, the transmitted signal is resampled upon reception by an analog-to-digital converter using a constant sampling frequency. Since this constant sampling frequency is not exactly equal to the transmission frequency, the received signal must be interpolated to obtain the samples that would have been received if the two frequencies were equal, in order to correctly demodulate the previously transmitted The data. [0005] Gardner proposed the principle of time synchronization by means of interpolation techno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M7/00H03M1/06H03M1/12H03M1/66H03M3/00
CPCH03M3/37H03M3/462H03M1/12H03M1/0836H03M3/508H03M1/66H04L27/00H03M7/00H03M1/06
Inventor J·V·布拉斯科克拉雷特J·C·里韦罗因苏亚S·伊兰佐莫利内罗A·加西亚桑何塞
Owner MARVELL HISPANIA SL SOC UNIPERSONAL
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