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Receiving device and receiving method

A technology for receiving devices and starting positions, which is applied in baseband systems, digital transmission systems, electrical components, etc., and can solve problems such as ICI accuracy deterioration, reception performance degradation, and propagation path variation values ​​not being calculated correctly, etc.

Inactive Publication Date: 2016-08-24
FUJITSU LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In this way, when the propagation path variation value is obtained from the propagation path estimation value of the fluctuating FFT time window position, the propagation path variation value is not correctly calculated, so the accuracy of ICI cancellation deteriorates and the reception performance deteriorates

Method used

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  • Receiving device and receiving method
  • Receiving device and receiving method
  • Receiving device and receiving method

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Embodiment Construction

[0030] Before describing the embodiments of the receiving apparatus and receiving method in detail, reference will be made to figure 1 ,figure 2, image 3 and Figure 4 A receiving device and its problems according to the related art will be described.

[0031] figure 1 is a block diagram showing an example of a receiving device according to the related art, and shows a receiving device conforming to Japanese terrestrial digital broadcasting (ISDB-T: Integrated Services Digital Broadcasting-Terrestrial). like figure 1 As shown in , the receiving device according to the related art includes a receiving unit 102 , a symbol timing detection unit 103 , an FFT unit 104 , an SP extraction unit 105 , an IFFT unit 106 , a buffer unit 107 and an interpolation synthesis unit 108 .

[0032] In addition, the receiving apparatus includes a tentative judgment unit 109, an FFT unit 110, a noise canceling unit 111, an ICI canceling unit 112, an ICI replica generating unit 113, a propagati...

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PUM

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Abstract

The invention discloses a receiving device and a receiving method. The receiving apparatus includes a symbol timing detection unit, a Fourier transform unit, a first symbol timing correction unit, and an interpolation synthesis unit. The symbol timing detection unit is configured to detect a Fourier transform start position from the received transmission signal in symbol units, and the Fourier transform unit is configured to perform Fourier transform using the detected Fourier transform start position. The first symbol timing correction unit is configured to calculate and correct the amount of change between the Fourier transform start position of the reference symbol and the detected Fourier transform start position, and the interpolation synthesis unit is configured to perform a plurality of symbols corresponding to the plurality of symbols In the interpolative synthesis of the delay profile, a plurality of symbols include a reference symbol and a symbol whose variation has been corrected.

Description

technical field [0001] Embodiments discussed herein relate to receiving apparatuses and receiving methods. Background technique [0002] Modulation in a transmitting device for digital broadcasting (for example, terrestrial digital broadcasting in Japan) first maps a bit stream of a transmission signal onto a complex plane by mapping processing. For example, in 64QAM (Quadrature Amplitude Modulation), a bit stream of a transmission signal is divided every 6 bits and mapped to 64 signal points on the complex plane. [0003] In addition, in OFDM (Orthogonal Frequency Division Multiplexing), data (signal) mapped to 64 signal points on the complex plane is subjected to IFFT (Inverse Fast Fourier Transform). Then, the digital signal subjected to IFFT is converted into an analog signal, which is then up-converted to a desired frequency and transmitted from the antenna. [0004] On the other hand, demodulation in a receiving apparatus for terrestrial digital broadcasting implemen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
CPCH04L25/03821H04L27/2665H04L27/2691H04L27/2675
Inventor 高木裕朗足立直人梅田雅敬
Owner FUJITSU LTD