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1. WO2003039049 - ダイレクトコンバージョン受信機

公開番号 WO/2003/039049
公開日 08.05.2003
国際出願番号 PCT/JP2002/011119
国際出願日 25.10.2002
IPC
H04J 11/00 2006.01
H電気
04電気通信技術
J多重通信
11直交多重化方式
CPC
H04B 1/0003
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
1Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
0003Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
H04B 1/0032
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
1Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
0003Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
0028wherein the AD/DA conversion occurs at baseband stage
0032with analogue quadrature frequency conversion to and from the baseband
H04B 1/30
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
1Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
06Receivers
16Circuits
30for homodyne or synchrodyne receivers
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
出願人
  • 三洋電機株式会社 SANYO ELECTRIC CO., LTD. [JP]/[JP] (AllExceptUS)
  • 湯浅正俊 YUASA, Masatoshi [JP]/[JP] (UsOnly)
  • 平松 達夫 HIRAMATSU, Tatsuo [JP]/[JP] (UsOnly)
  • 花房清夫 HANAFUSA, Sumio [JP]/[JP] (UsOnly)
発明者
  • 湯浅正俊 YUASA, Masatoshi
  • 平松 達夫 HIRAMATSU, Tatsuo
  • 花房清夫 HANAFUSA, Sumio
代理人
  • 香山 秀幸 KAYAMA, Hideyuki
優先権情報
2001/33291030.10.2001JP
2001/33291130.10.2001JP
2001/33291230.10.2001JP
公開言語 (言語コード) 日本語 (JA)
出願言語 (言語コード) 日本語 (JA)
指定国 (国コード)
発明の名称
(EN) DIRECT CONVERSION RECEIVER
(FR) RECEPTEUR A CONVERSION DIRECTE
(JA) ダイレクトコンバージョン受信機
要約
(EN)
A direct conversion receiver includes a down converter for frequency-converting an analog RF signal modulated by the OFDM method in such a manner that the center frequency of the occupied frequency of the reception object segment is frequency zero, AD conversion means for converting a down convert signal obtained by the down converter into a digital signal, FFT means for performing fast Fourier transform to the signal obtained by the AD conversion means and converting the time axis into a frequency axis, and unnecessary component removal means for removing unnecessary components other than the reception object segment from the output signal of the FFT means.
(FR)
L'invention concerne un récepteur à conversion directe comprenant un convertisseur abaisseur de fréquence destiné à abaisser la fréquence d'un signal RF analogique modulé par le procédé OFDM de telle manière que la fréquence centrale de la fréquence occupée du segment objet de réception soit nulle, un numériseur destiné à convertir en signal numérique un signal abaissé en fréquence par le convertisseur abaisseur de fréquence, des moyens FFT permettant une transformation de Fourier rapide du signal sortant du numériseur et une transformation de l'axe temporel en axe fréquentiel, et des moyens d'élimination de composant non nécessaire du signal sortant des moyens FFT, autre que le segment objet de réception.
(JA)
OFDM方式で変調されたアナログRF信号を、受信対象セグメントの占有周波数の中心周波数が周波数零となるように周波数変換するダウンコンバータ、ダウンコンバータによって得られたダウンコンバート信号をデジタル信号に変換するAD変換手段、AD変換手段によって得られた信号に対して、高速フーリエ変換を施して、時間軸を周波数軸に変換するFFT手段、およびFFT手段の出力信号から、受信対象セグメント以外の不要成分を除去する不要成分除去手段を備えている。
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