Method and device for eliminating spectrum inversion, and receiver

A spectrum inversion and receiver technology, applied in the field of eliminating the spectrum inversion of the receiver, can solve the problem of prolonged locking time of communication devices, and achieve the effect of saving time consumption and eliminating spectrum inversion

Active Publication Date: 2011-09-21
ALICORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In short, when the spectrum inversion occurs in the traditional receiver 600, the locking time of the entire communication device will be prolonged due to re-synchronization
[0011] In addition, there are some studies and literatures that use other methods to check the signals of th

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  • Method and device for eliminating spectrum inversion, and receiver
  • Method and device for eliminating spectrum inversion, and receiver
  • Method and device for eliminating spectrum inversion, and receiver

Examples

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Embodiment Construction

[0056] The embodiment of the present invention proposes a method for eliminating spectrum inversion. This method for eliminating spectrum inversion is different from the prior art that inverts signals in the time domain, but instead uses a frequency domain interleaver to process the signals passed through the tuner and The frequency spectrum of the down-converted and sampled received signal is inverted to obtain the original received signal. Please refer to Figure 1A ~ 1C , Figure 1C yes Figure 1B A schematic diagram of the frequency spectrum of the signal corresponding to the frequency spectrum after being processed by the frequency domain interleaver. Depend on Figure 1C It can be seen that after the frequency domain interleaver performs inversion processing on the received signal with spectrum inversion in the frequency domain, the frequency spectrum of the original received signal can be obtained.

[0057] Assuming that the received signal is A(t)+jB(t), the signal...

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Abstract

The invention discloses a method for eliminating spectrum inversion. The method comprises the following steps of: detecting whether a received signal has a spectrum inversion problem or not; if the received signal has the spectrum inversion problem, checking whether a frequency point index value FFT_IDX of fast Fourier transform is 0 or not; if the frequency point index value FFT_IDX is 0, adopting an orthogonal inphase frequency domain signal of the 0th sub-carrier of the received signal as an inphase orthogonal frequency domain signal of the 0th sub-carrier of an output signal; and if the frequency point index value FFT_IDX is not 0, adopting the orthogonal inphase frequency domain signal of the (N-FFT_IDX)th sub-carrier of the received signal as the inphase orthogonal frequency domain signal of the (N-FFT_IDX)th sub-carrier of the output signal, wherein N is the number of sampling points of the fast Fourier transformer, and the frequency point index value FFT_IDX is an integer ranged from 0 to N-1.

Description

technical field [0001] The present invention relates to a method for eliminating spectrum inversion in a receiver, and in particular to a method for eliminating spectrum inversion using a frequency domain de-interleaver (FREQUENCY DE-ITERLEVER), its device and its receiver machine. Background technique [0002] At present, the development of communication technology has become more and more mature. In daily life, any type of communication device can be seen all the time. The receivers in the communication devices all have a tuner (TUNER) for receiving wireless signals or wired signals, and filtering out the received signals in a specific frequency spectrum, so as to obtain the information required by the communication device. However, after the received signal is processed by the tuner, the receiver will sample and down-convert the received signal (DOWN CONVERSION), which may cause the problem of spectrum inversion (I / Q SWAP) of the received signal, that is, the received si...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04L25/03H04L1/00
Inventor 赵丹王宇
Owner ALICORP
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