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1. CN1568594 - OFDM receiving apparatus and OFDM signal correction method

Office
Chine
Numéro de la demande 03801259.6
Date de la demande 18.06.2003
Numéro de publication 1568594
Date de publication 19.01.2005
Type de publication A
CIB
H04J 11/00
HÉLECTRICITÉ
04TECHNIQUE DE LA COMMUNICATION ÉLECTRIQUE
JCOMMUNICATION MULTIPLEX
11Systèmes multiplex orthogonaux
CPC
H04L 27/2614
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27Modulated-carrier systems
26Systems using multi-frequency codes
2601Multicarrier modulation systems
2614Peak power aspects
H04L 27/2647
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27Modulated-carrier systems
26Systems using multi-frequency codes
2601Multicarrier modulation systems
2647Arrangements specific to the receiver only
H04L 2025/03414
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
25Baseband systems
02Details
03Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
03006Arrangements for removing intersymbol interference
0335characterised by the type of transmission
03375Passband transmission
03414Multicarrier
H04L 27/26526
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27Modulated-carrier systems
26Systems using multi-frequency codes
2601Multicarrier modulation systems
2647Arrangements specific to the receiver only
2649Demodulators
26524Fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators in combination with other circuits for demodulation
26526with inverse FFT [IFFT] or inverse DFT [IDFT] demodulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] receiver or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]
H04L 27/265
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27Modulated-carrier systems
26Systems using multi-frequency codes
2601Multicarrier modulation systems
2647Arrangements specific to the receiver only
2649Demodulators
265Fourier transform demodulators, e.g. fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators
Déposants Matsushita Electric Ind Co., Ltd.
松下电器产业株式会社
Inventeurs Uesugi Mitsuru
上杉充
Ota Eiji
太田英司
Mandataires huang xiaolin wang zhisen
北京市柳沈律师事务所
北京市柳沈律师事务所
Données relatives à la priorité 2003001438 07.01.2003 JP
180204/2002 20.06.2002 JP
Titre
(EN) OFDM receiving apparatus and OFDM signal correction method
(ZH) 正交频分复用接收装置以及正交频分复用信号的校正方法
Abrégé
(EN) A tap selection section 502 divides sampling signals r(i,0) through r(i,7) obtained from a received OFDM signal into sampling signals subject to correction and sampling signals not subject to correction, sends sampling signals subject to correction to an FIR filter 503, and sends sampling signals not subject to correction to an FTT 505. FIR filter 503 takes sampling signals as variable gain, and also has a Fourier transform known coefficient as input. An adaptive algorithm section 511 converges the values of sampling signals that include a distortion component comprising variable gain of FIR filter 503 to an optimal value so that error value e(i,k) due to distortion decreases.
(ZH)

抽头选择部(502)将从接收OFDM信号取得的采样信号(r(i,0)至r(i,7))分为要进行校正的采样信号和不进行校正的采样信号,在将要进行校正的采样信号送至FIR滤波器(503)的同时,将不进行校正的采样信号送至FFT(505)。FIR滤波器(503)在接收采样信号作为可变增益的同时,接收作为输入的傅立叶变换的已知系数。自适应算法部(511)使作为FIR滤波器(503)的可变增益的包含失真成分的采样信号的值收敛为最优值,从而使因失真所产生的误差值(e(i,k))变小。