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Blind equalizer for multicarrier receiving device and method thereof

A technology of multi-carrier reception and blind equalization, applied in multi-frequency code systems, transmission systems, electrical components, etc., can solve problems such as deterioration of equalization function and inability to compensate for channels

Inactive Publication Date: 2005-02-02
SAMSUNG ELECTRONICS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it is not possible to compensate for instantaneously varying channel
In addition, in instantaneously changing channels such as dynamic channels and mobile channels, the equalization function is deteriorated

Method used

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  • Blind equalizer for multicarrier receiving device and method thereof
  • Blind equalizer for multicarrier receiving device and method thereof
  • Blind equalizer for multicarrier receiving device and method thereof

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Embodiment Construction

[0023] Hereinafter, the present invention will be described in detail with reference to the drawings. When a component having the same structure and operation is referred to in the prior art, the component is always referred to by the same reference numeral.

[0024] Figure 4 is a block diagram of a blind equalizer of a multi-carrier receiving device according to an embodiment of the present invention. refer to Figure 4 , the blind equalizer includes: an additional data removal unit 400 , an FFT unit 410 , an adaptive equalization unit 420 , a power estimation unit 430 , and an error calculation unit 440 . Additional data removal unit 400 receives the TDS-OFDM signal, and removes PN sequence 300 and GI 310 , leaving valid data 320 . The FFT unit 410 receives the signal in which only the effective data 320 remains, and transforms the signal into a frequency domain signal by fast Fourier transform. The adaptive equalization unit 420 receives and equalizes the transformed s...

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Abstract

The invention relates to a blind equalizer of a multi-carrier receiving device, which comprises a removing unit for the additional data, an FFT unit, a self-adapting equalizing unit, and an error calculating unit; wherein, the removing unit for the additional unit is used to remove the additional data from the multi-carrier signal received, retain only the effective data, and add the additional data into the signal for transmission and reception; the FFT unit is used to calculate the filed effective data to convert the same into frequency domain signals; the self- adapting equalizing unit is intended for equalizing the converted signals based on a predefined mathematical expression; the error calculating unit is used to calculate the errors in the equalized signals received. The self-adopting unit is able to update the predefined mathematical expression by means of the calculated errors. Therefore, the blind equalizer has an advantage of even compensating the channel changing instantaneously.

Description

technical field [0001] The invention relates to a blind equalizer (blind equalizer) of a multi-carrier receiving device and a method thereof. More particularly, the present invention relates to a blind equalizer of a multi-carrier receiving apparatus and a method thereof, which equalize in the frequency domain using valid data instead of synchronization signals. Background technique [0002] Time Domain Synchronous Orthogonal Frequency Division Multiplexing (TDS-OFDM) inserts predetermined information in a time domain frame structure so that synchronization and equalization can be performed by using an OFDM modulation scheme. This has the advantage of a fast convergence of the means for synchronization and equalization due to the usual use of pseudo-noise (PN) sequences in a predetermined structure. [0003] figure 1 is a block diagram of a conventional equalizer in the TDS-OFDM frequency domain. figure 1 The frequency domain equalizer in includes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/10H04B1/12H04L27/26
CPCH04B1/10
Inventor 金正振
Owner SAMSUNG ELECTRONICS CO LTD
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