JP2001308820A5 - - Google Patents
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- JP2001308820A5 JP2001308820A5 JP2000124153A JP2000124153A JP2001308820A5 JP 2001308820 A5 JP2001308820 A5 JP 2001308820A5 JP 2000124153 A JP2000124153 A JP 2000124153A JP 2000124153 A JP2000124153 A JP 2000124153A JP 2001308820 A5 JP2001308820 A5 JP 2001308820A5
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- subcarrier
- step size
- frequency division
- orthogonal frequency
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Claims (9)
受信した時間ドメインの信号を、それぞれのサブキャリア成分を含む周波数ドメインの信号に変換するフーリエ変換手段と、
係数計算手段と、
上記フーリエ変換手段の出力および上記係数計算手段の出力を入力とし、上記係数計算手段から出力されるフィルタ係数によるフィルタリングを行うフィルタ手段と、
上記フィルタ手段の出力を入力とし、サブキャリアをそれぞれの変調方式に応じた復調法によって復調を行う復調手段とを備え、
上記フィルタ手段は、各サブキャリア手段を他のサブキャリア手段と組合せ、上記フィルタ手段の出力においてキャリア間干渉が減少するように上記フィルタリングを行い、
上記係数計算手段は、上記フィルタ手段の出力および上記フーリエ変換手段の出力を入力とし、上記キャリア間干渉が最小になるように適応的にフィルタ係数を逐次更新して出力する
ことを特徴とする直交周波数分割多重信号受信装置。In an orthogonal frequency division multiplexing signal receiving apparatus for reproducing transmission data from an orthogonal frequency division multiplexed signal,
Fourier transform means for transforming the received time domain signal into a frequency domain signal including each subcarrier component ;
Coefficient calculation means;
Filter means for performing filtering by a filter coefficient output from the coefficient calculation means, using the output of the Fourier transform means and the output of the coefficient calculation means as inputs,
The output of the filter means as an input, and comprises a demodulating means for demodulating the subcarrier by a demodulation method corresponding to each modulation method,
The filter means combines each subcarrier means with other subcarrier means, performs the filtering so that inter-carrier interference is reduced at the output of the filter means,
The coefficient calculating means inputs the output of the output and the Fourier transform means of the filter means, characterized in that between the carrier interference sequentially updates and outputs the adaptive filter coefficients so as to minimize Orthogonal frequency division multiplex signal receiver.
該パイロットタイミング信号生成手段の出力を入力とし、タイミング信号に応じたステップサイズパラメータを出力するステップサイズ制御手段とをさらに備え、
上記係数計算手段は、上記ステップサイズ値として該ステップサイズ制御手段の出力を入力とし、これに基づき上記フィルタ係数の逐次更新を行う
ことを特徴とする請求項２に記載の直交周波数分割多重信号受信装置。Pilot timing signal generating means for outputting a timing signal for identifying whether or not the output signal of the filter means is a pilot carrier;
Step size control means for receiving the output of the pilot timing signal generation means as input and outputting a step size parameter corresponding to the timing signal;
3. The orthogonal frequency division multiplex signal reception according to claim 2 , wherein the coefficient calculation means receives the output of the step size control means as the step size value and sequentially updates the filter coefficients based on the output. apparatus.
該電力計算手段の出力を入力とし、これに基づきステップサイズパラメータを制御して出力するステップサイズ制御手段とをさらに備え、
上記係数計算手段は、上記ステップサイズ値として該ステップサイズ制御手段の出力を入力とし、これに基づき上記フィルタ係数の逐次更新を行うことを特徴とする請求項２に記載の直交周波数分割多重信号受信装置。Power calculating means for calculating and outputting the signal power for each subcarrier;
Step size control means for taking the output of the power calculation means as an input and controlling and outputting a step size parameter based on the output;
3. The orthogonal frequency division multiplex signal reception according to claim 2 , wherein the coefficient calculation means receives the output of the step size control means as the step size value and sequentially updates the filter coefficients based on the output. apparatus.
上記ステップサイズ制御手段は、上記復調手段から出力される各サブキャリアの上記平均的な電力を表す情報を入力とし、これに基づき上記ステップサイズパラメータを制御して出力することを特徴とする請求項４に記載の直交周波数分割多重信号受信装置。When the demodulation means calculates a physical quantity corresponding to the average power of each subcarrier in the process of performing demodulation based on the channel characteristics estimated for each subcarrier, the demodulation means It also serves as a power calculation means,
The step size control means receives information representing the average power of each subcarrier output from the demodulation means as input, and controls and outputs the step size parameter based on the information. orthogonal frequency division multiplex signal receiving apparatus according to 4.
該電力計算手段の出力を入力とし、これに基づきリファレンスレベル値を制御して出力するリファレンス制御手段とをさらに備え、
上記係数計算手段は、上記リファレンス値として該リファレンス制御手段の出力を入力とし、これに基づき上記フィルタ係数の逐次更新を行うことを特徴とする請求項２に記載の直交周波数分割多重信号受信装置。Power calculating means for calculating and outputting the signal power for each subcarrier;
The output of the power calculation means as an input, further comprising a reference control means for controlling and outputting a reference level value based on the output,
3. The orthogonal frequency division multiplex signal receiving apparatus according to claim 2 , wherein the coefficient calculation means receives the output of the reference control means as the reference value and sequentially updates the filter coefficient based on the output.
上記ステップサイズ制御手段は、上記復調手段から出力される各サブキャリアの上記平均的な電力を表す情報を入力とし、これに基づき上記リファレンス値を制御して出力することを特徴とする請求項７に記載の直交周波数分割多重信号受信装置。When the demodulation means calculates a physical quantity corresponding to the average power of each subcarrier in the process of performing demodulation based on the channel characteristics estimated for each subcarrier, the demodulation means It also serves as a power calculation means,
The step size control means according to claim, characterized in that an input information representing the average power of each subcarrier output from said demodulation means, and outputs the controlling the reference value on the basis of this 7 The orthogonal frequency division multiplex signal receiving apparatus described in 1.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000124153A JP2001308820A (en) | 2000-04-25 | 2000-04-25 | Device for receiving orthogonal frequency division multiple signal |
| GB0100501A GB2364222B (en) | 2000-04-25 | 2001-01-09 | Receiver for orthogonal frequency-division multiplexed signal |
| CN 01117184 CN1321014A (en) | 2000-04-25 | 2001-04-25 | Orthogonal frequency-division multiplex signal receiving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000124153A JP2001308820A (en) | 2000-04-25 | 2000-04-25 | Device for receiving orthogonal frequency division multiple signal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001308820A JP2001308820A (en) | 2001-11-02 |
| JP2001308820A5 true JP2001308820A5 (en) | 2005-06-16 |
Family
ID=18634327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000124153A Pending JP2001308820A (en) | 2000-04-25 | 2000-04-25 | Device for receiving orthogonal frequency division multiple signal |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2001308820A (en) |
| CN (1) | CN1321014A (en) |
| GB (1) | GB2364222B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100819255B1 (en) * | 2002-01-07 | 2008-04-02 | 삼성전자주식회사 | Apparatus for canceller interference in a interference canceller system |
| JP3640185B2 (en) | 2002-02-13 | 2005-04-20 | 日本電気株式会社 | Inter-subcarrier interference reduction method for multi-carrier communication system and receiver using the same |
| JP4472473B2 (en) | 2004-09-13 | 2010-06-02 | 富士通株式会社 | Receiving apparatus and communication system |
| JP4641233B2 (en) * | 2005-09-14 | 2011-03-02 | ルネサスエレクトロニクス株式会社 | Demodulator and demodulation method |
| KR101100791B1 (en) | 2006-10-16 | 2012-01-02 | 닛본 덴끼 가부시끼가이샤 | Reception method and reception device |
| JP4894561B2 (en) * | 2007-03-06 | 2012-03-14 | 住友電気工業株式会社 | Communication apparatus and weight update method |
| GB2455530B (en) * | 2007-12-12 | 2010-04-28 | Nortel Networks Ltd | Channel estimation method and system for inter carrier interference-limited wireless communication networks |
| CN115174321A (en) * | 2022-07-01 | 2022-10-11 | Oppo广东移动通信有限公司 | Signal processing method and device, baseband chip, terminal and storage medium |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5497398A (en) * | 1993-08-12 | 1996-03-05 | Aware, Inc. | Multi-carrier transceiver |
| FI943613A (en) * | 1994-08-03 | 1996-02-04 | Nokia Technology Gmbh | Method and equalizer for frequency-feasible equalization of a digital signal |
| DE69723563T2 (en) * | 1996-09-02 | 2004-05-13 | Stmicroelectronics N.V. | IMPROVEMENTS IN OR WITH REGARD TO MULTI-CARRIER TRANSFER SYSTEMS |
| SE9703630L (en) * | 1997-03-03 | 1998-09-04 | Telia Ab | Improvements to, or with respect to, synchronization |
| EP0877526B1 (en) * | 1997-05-02 | 2008-01-16 | Lsi Logic Corporation | Demodulating digital video broadcast signals |
| SE9801748L (en) * | 1998-05-18 | 1999-11-19 | Telia Ab | Improvements in or relating to telecommunication transmission systems |
-
2000
- 2000-04-25 JP JP2000124153A patent/JP2001308820A/en active Pending
-
2001
- 2001-01-09 GB GB0100501A patent/GB2364222B/en not_active Expired - Fee Related
- 2001-04-25 CN CN 01117184 patent/CN1321014A/en active Pending
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