JP2003229833A5 - - Google Patents
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- JP2003229833A5 JP2003229833A5 JP2002027064A JP2002027064A JP2003229833A5 JP 2003229833 A5 JP2003229833 A5 JP 2003229833A5 JP 2002027064 A JP2002027064 A JP 2002027064A JP 2002027064 A JP2002027064 A JP 2002027064A JP 2003229833 A5 JP2003229833 A5 JP 2003229833A5
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該ダイバーシティ回路が、
アンテナで受信した信号である複数のアンテナ信号を入力する複数のアンテナ信号入力端子と、
該複数のアンテナ信号入力端子から入力されたアンテナ信号の内の少なくとも２以上のアンテナ信号に含まれるＯＦＤＭ信号に共通で且つシンボル間干渉雑音レベルが最小になるＦＦＴへの信号取り込み期間であるＦＦＴ共通窓期間を算出し、算出した該ＦＦＴ共通窓期間を表すＦＦＴ共通窓期間信号を出力するＦＦＴ共通窓期間算出回路と、
該ＦＦＴ共通窓期間算出回路から出力されるＦＦＴ共通窓期間信号を入力し、該ＦＦＴ共通窓期間を除く期間内で前記複数のアンテナ信号を切替えるためのアンテナ信号切替え制御信号あるいは更に前記複数のアンテナ信号を切替える時刻のＯＦＤＭ信号のシンボル位置を表すアンテナ信号切替えシンボル信号を算出して出力するアンテナ信号切替え制御回路と、
該アンテナ信号切替え制御信号あるいは更に該アンテナ信号切替えシンボル信号により、入力される前記複数のアンテナ信号を切替え選択アンテナ信号を出力するアンテナ信号切替え回路と、
該選択アンテナ信号を出力する出力端子と、前記ＦＦＴ共通窓期間信号を出力する出力端子、あるいは更に前記アンテナ信号切替えシンボル信号を出力する出力端子とを備えたダイバーシティ回路であることを特徴とするダイバーシティ・アダプタ。A diversity circuit for receiving an OFDM signal, which is an orthogonal frequency division multiplexing modulation transmission signal that transmits an information code using a plurality of carriers orthogonal to each other, and outputting the signal to an OFDM receiver connected in a subsequent stage A diversity adapter,
The diversity circuit is
A plurality of antenna signal input terminals for inputting a plurality of antenna signals which are signals received by the antenna;
Common to FFT, which is a signal acquisition period to FFT that is common to OFDM signals included in at least two antenna signals among the antenna signals input from the plurality of antenna signal input terminals and that minimizes the intersymbol interference noise level. An FFT common window period calculation circuit that calculates a window period and outputs an FFT common window period signal representing the calculated FFT common window period;
An FFT common window period signal output from the FFT common window period calculation circuit is input, an antenna signal switching control signal for switching the plurality of antenna signals within a period excluding the FFT common window period, or further the plurality of antennas An antenna signal switching control circuit for calculating and outputting an antenna signal switching symbol signal representing a symbol position of the OFDM signal at the time of signal switching;
An antenna signal switching circuit for switching the plurality of antenna signals inputted by the antenna signal switching control signal or the antenna signal switching symbol signal and outputting a selected antenna signal;
A diversity circuit comprising: an output terminal for outputting the selected antenna signal; an output terminal for outputting the FFT common window period signal; or an output terminal for further outputting the antenna signal switching symbol signal. ·adapter.
回路を有するダイバーシティ受信装置であって、
該ダイバーシティ回路が、
アンテナで受信した信号である複数のアンテナ信号を入力する複数のアンテナ信号入力端子と、
該複数のアンテナ信号入力端子から入力されたアンテナ信号の内の少なくとも２以上のアンテナ信号に含まれるＯＦＤＭ信号に共通で且つシンボル間干渉雑音レベルが最小になるＦＦＴへの信号取り込み期間であるＦＦＴ共通窓期間を算出し、算出した該ＦＦＴ共通窓期間を表すＦＦＴ共通窓期間信号を出力するＦＦＴ共通窓期間算出回路と、
該ＦＦＴ共通窓期間算出回路から出力されるＦＦＴ共通窓期間信号を入力し、該ＦＦＴ共通窓期間を除く期間内で前記複数のアンテナ信号を切替えるためのアンテナ信号切替え制御信号あるいは更に前記複数のアンテナ信号を切替える時刻のＯＦＤＭ信号のシンボル位置を表すアンテナ信号切替えシンボル信号を算出して出力するアンテナ信号切替え制御回路と、
該アンテナ信号切替え制御信号あるいは更に該アンテナ信号切替えシンボル信号により、入力される前記複数のアンテナ信号を切替え選択アンテナ信号を出力するアンテナ信号切替え回路とを備えたダイバーシティ回路であって、
且つ前記該選択アンテナ信号を、前記ＦＦＴ共通窓期間信号あるいは更に前記アンテナ信号切替えシンボル信号を用いて復調処理することを特徴とするダイバーシティ受信装置。A diversity receiver having a diversity circuit that receives an OFDM signal that is an orthogonal frequency division multiplexing modulation transmission signal that transmits information codes using a plurality of carriers orthogonal to each other,
The diversity circuit is
A plurality of antenna signal input terminals for inputting a plurality of antenna signals which are signals received by the antenna;
Common to FFT, which is a signal acquisition period to FFT that is common to OFDM signals included in at least two antenna signals among the antenna signals input from the plurality of antenna signal input terminals and that minimizes the intersymbol interference noise level. An FFT common window period calculation circuit that calculates a window period and outputs an FFT common window period signal representing the calculated FFT common window period;
An FFT common window period signal output from the FFT common window period calculation circuit is input, an antenna signal switching control signal for switching the plurality of antenna signals within a period excluding the FFT common window period, or further the plurality of antennas An antenna signal switching control circuit for calculating and outputting an antenna signal switching symbol signal representing a symbol position of the OFDM signal at the time of signal switching;
A diversity circuit comprising: an antenna signal switching circuit that outputs a selected antenna signal by switching the plurality of antenna signals inputted by the antenna signal switching control signal or further by the antenna signal switching symbol signal;
A diversity receiving apparatus, wherein the selected antenna signal is demodulated using the FFT common window period signal or further the antenna signal switching symbol signal.
該ダイバーシティ回路が、
アンテナで受信した信号である複数のアンテナ信号を入力する複数のアンテナ信号入力端子と、
入力された該複数のアンテナ信号を比較し、各アンテナ信号に含まれる伝送信号成分のレベルあるいはそのＣ／Ｎ値が最も高いアンテナ信号を選択する、あるいは各アンテナ信号に含まれる主波のレベルあるいはそのＣ／Ｎ値が最も高いアンテナ信号を選択する、あるいは各アンテナ信号に含まれる主波以外の伝送信号成分のレベルが主波のレベルに対して最も小さいアンテナ信号を選択し、選択したアンテナ信号の番号を選択アンテナ信号番号として出力する回路部と、
前記複数のアンテナ信号と前記選択アンテナ信号番号を入力し、前記選択した番号のアンテナ信号に最適なＦＦＴへの信号取り込み期間であるＦＦＴ窓期間を算出し、算出したＦＦＴ窓期間を表す新ＦＦＴ窓期間信号と、既に選択されているアンテナ信号に対する最適なＦＦＴ窓期間を表す現ＦＦＴ窓期間信号を出力する新ＦＦＴ窓期間算出回路と、
前記現ＦＦＴ窓期間信号と前記新ＦＦＴ窓期間信号を入力し、前記新ＦＦＴ窓期間信号が指定する期間と前記現ＦＦＴ窓期間信号が指定する期間を除く期間内で、既に選択されているアンテナ信号と新たに選択されたアンテナ信号を切替えるためのアンテナ信号切替え制御信号と、該アンテナ信号の切替えと同時に前記現ＦＦＴ窓期間信号から前記新ＦＦＴ窓期間信号に切替えて得られる選択ＦＦＴ窓期間信号、あるいは更に該アンテナ信号を切替える時刻のＯＦＤＭ信号のシンボル位置を表すアンテナ信号切替えシンボル信号を算出して出力するアンテナ信号切替え制御回路と、
該アンテナ信号切替え制御信号と前記選択ＦＦＴ窓期間信号あるいは更に該アンテナ信号切替えシンボル信号により、入力される前記複数のアンテナ信号を切替え選択アンテナ信号を出力するアンテナ信号切替え回路と、
該選択アンテナ信号を出力する出力端子と、前記選択ＦＦＴ窓期間信号を出力する出力端子、あるいは更に前記アンテナ信号切替えシンボル信号を出力する出力端子とを備えたダイバーシティ回路であることを特徴とするダイバーシティ・アダプタ。A diversity circuit for receiving an OFDM signal, which is an orthogonal frequency division multiplexing modulation transmission signal that transmits an information code using a plurality of carriers orthogonal to each other, and outputting the signal to an OFDM receiver connected in a subsequent stage A diversity adapter,
The diversity circuit is
A plurality of antenna signal input terminals for inputting a plurality of antenna signals which are signals received by the antenna;
The plurality of input antenna signals are compared, and the antenna signal having the highest level of the transmission signal component or the C / N value included in each antenna signal is selected, or the level of the main wave included in each antenna signal or The antenna signal having the highest C / N value is selected, or the antenna signal having the lowest transmission signal component level other than the main wave included in each antenna signal is selected with respect to the main wave level. A circuit unit for outputting the number of the selected antenna signal number as
A new FFT window representing the calculated FFT window period by inputting the plurality of antenna signals and the selected antenna signal number, calculating an FFT window period that is a signal capture period into the FFT that is optimal for the antenna signal of the selected number A new FFT window period calculation circuit for outputting a period signal and a current FFT window period signal representing an optimum FFT window period for an already selected antenna signal;
The current FFT window period signal and the new FFT window period signal are input, and an antenna that is already selected within a period specified by the new FFT window period signal and a period specified by the current FFT window period signal An antenna signal switching control signal for switching a signal and a newly selected antenna signal, and a selected FFT window period signal obtained by switching from the current FFT window period signal to the new FFT window period signal simultaneously with the switching of the antenna signal Or, further, an antenna signal switching control circuit for calculating and outputting an antenna signal switching symbol signal representing a symbol position of the OFDM signal at the time of switching the antenna signal;
An antenna signal switching circuit for switching the plurality of antenna signals to be input according to the antenna signal switching control signal and the selected FFT window period signal or further the antenna signal switching symbol signal;
A diversity circuit comprising: an output terminal that outputs the selected antenna signal; an output terminal that outputs the selected FFT window period signal; or an output terminal that further outputs the antenna signal switching symbol signal. ·adapter.
該ダイバーシティ回路が、
アンテナで受信した信号である複数のアンテナ信号を入力する複数のアンテナ信号入力端子と、
入力された該複数のアンテナ信号を比較し、各アンテナ信号に含まれる伝送信号成分のレベルあるいはそのＣ／Ｎ値が最も高いアンテナ信号を選択する、あるいは各アンテナ信号に含まれる主波のレベルあるいはそのＣ／Ｎ値が最も高いアンテナ信号を選択する、あるいは各アンテナ信号に含まれる主波以外の伝送信号成分のレベルが主波のレベルに対して最も小さいアンテナ信号を選択し、選択したアンテナ信号の番号を選択アンテナ信号番号として出力する回路部と、
前記複数のアンテナ信号と前記選択アンテナ信号番号を入力し、前記選択した番号のアンテナ信号に最適なＦＦＴへの信号取り込み期間であるＦＦＴ窓期間を算出し、算出したＦＦＴ窓期間を表す新ＦＦＴ窓期間信号と、既に選択されているアンテナ信号に対する最適なＦＦＴ窓期間を表す現ＦＦＴ窓期間信号を出力する新ＦＦＴ窓期間算出回路と、
前記現ＦＦＴ窓期間信号と前記新ＦＦＴ窓期間信号を入力し、前記新ＦＦＴ窓期間信号が指定する期間と前記現ＦＦＴ窓期間信号が指定する期間を除く期間内で、既に選択されているアンテナ信号と新たに選択されたアンテナ信号を切替えるためのアンテナ信号切替え制御信号と、該アンテナ信号の切替えと同時に前記現ＦＦＴ窓期間信号から前記新ＦＦＴ窓期間信号に切替えて得られる選択ＦＦＴ窓期間信号、あるいは更に該アンテナ信号を切替える時刻のＯＦＤＭ信号のシンボル位置を表すアンテナ信号切替えシンボル信号を算出して出力するアンテナ信号切替え制御回路と、
該アンテナ信号切替え制御信号と前記選択ＦＦＴ窓期間信号あるいは更に該アンテナ信号切替えシンボル信号により、入力される前記複数のアンテナ信号を切替え選択アンテナ信号を出力するアンテナ信号切替え回路とを備えたダイバーシティ回路であって、
且つ前記該選択アンテナ信号を、前記ＦＦＴ共通窓期間信号あるいは更に前記アンテナ信号切替えシンボル信号を用いて復調処理することを特徴とするダイバーシティ受信装置。A diversity receiver having a diversity circuit that receives an OFDM signal that is an orthogonal frequency division multiplexing modulation transmission signal that transmits information codes using a plurality of carriers orthogonal to each other,
The diversity circuit is
A plurality of antenna signal input terminals for inputting a plurality of antenna signals which are signals received by the antenna;
The plurality of input antenna signals are compared, and the antenna signal having the highest level of the transmission signal component or the C / N value included in each antenna signal is selected, or the level of the main wave included in each antenna signal or The antenna signal having the highest C / N value is selected, or the antenna signal having the lowest transmission signal component level other than the main wave included in each antenna signal is selected with respect to the main wave level. A circuit unit for outputting the number of the selected antenna signal number as
A new FFT window representing the calculated FFT window period by inputting the plurality of antenna signals and the selected antenna signal number, calculating an FFT window period that is a signal capture period into the FFT that is optimal for the antenna signal of the selected number A new FFT window period calculation circuit for outputting a period signal and a current FFT window period signal representing an optimum FFT window period for an already selected antenna signal;
The current FFT window period signal and the new FFT window period signal are input, and an antenna that is already selected within a period specified by the new FFT window period signal and a period specified by the current FFT window period signal An antenna signal switching control signal for switching a signal and a newly selected antenna signal, and a selected FFT window period signal obtained by switching from the current FFT window period signal to the new FFT window period signal simultaneously with the switching of the antenna signal Or, further, an antenna signal switching control circuit for calculating and outputting an antenna signal switching symbol signal representing a symbol position of the OFDM signal at the time of switching the antenna signal;
A diversity circuit comprising: the antenna signal switching control signal and the selected FFT window period signal or the antenna signal switching circuit for switching the plurality of antenna signals inputted according to the antenna signal switching symbol signal and outputting the selected antenna signal. There,
A diversity receiving apparatus, wherein the selected antenna signal is demodulated using the FFT common window period signal or further the antenna signal switching symbol signal.
該ダイバーシティ回路が、
アンテナで受信した信号である複数のアンテナ信号を入力する複数のアンテナ信号入力端子と、
入力された該複数のアンテナ信号を比較し、各アンテナ信号に含まれる伝送信号成分のレベルあるいはそのＣ／Ｎ値が最も高いアンテナ信号を選択する、あるいは各アンテナ信号に含まれる主波のレベルあるいはそのＣ／Ｎ値が最も高いアンテナ信号を選択する、あるいは各アンテナ信号に含まれる主波以外の伝送信号成分のレベルが主波のレベルに対して最も小さいアンテナ信号を選択する選択手段と、該選択アンテナ信号を出力する出力端子とを備えたダイバーシティ回路であることを特徴とするダイバーシティ・アダプタ。A diversity adapter having a diversity circuit for receiving a transmission signal and outputting it to a receiving apparatus connected to a subsequent stage,
The diversity circuit is
A plurality of antenna signal input terminals for inputting a plurality of antenna signals which are signals received by the antenna;
The plurality of input antenna signals are compared, and the antenna signal having the highest level of the transmission signal component or the C / N value included in each antenna signal is selected, or the level of the main wave included in each antenna signal or Selecting means for selecting an antenna signal having the highest C / N value, or selecting an antenna signal in which the level of a transmission signal component other than the main wave included in each antenna signal is the lowest with respect to the level of the main wave; A diversity adapter comprising a diversity circuit having an output terminal for outputting a selected antenna signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002027064A JP3996782B2 (en) | 2002-02-04 | 2002-02-04 | Diversity adapter, OFDM receiving apparatus for inputting signal from diversity adapter, and diversity receiving apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002027064A JP3996782B2 (en) | 2002-02-04 | 2002-02-04 | Diversity adapter, OFDM receiving apparatus for inputting signal from diversity adapter, and diversity receiving apparatus |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2003229833A JP2003229833A (en) | 2003-08-15 |
| JP2003229833A5 true JP2003229833A5 (en) | 2005-08-11 |
| JP3996782B2 JP3996782B2 (en) | 2007-10-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002027064A Expired - Fee Related JP3996782B2 (en) | 2002-02-04 | 2002-02-04 | Diversity adapter, OFDM receiving apparatus for inputting signal from diversity adapter, and diversity receiving apparatus |
Country Status (1)
| Country | Link |
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| JP (1) | JP3996782B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2420953B (en) * | 2004-12-16 | 2008-12-03 | Fujitsu Ltd | Symbol timing estimation in communication systems |
| CN101053189B (en) | 2005-05-16 | 2012-05-23 | 三菱电机株式会社 | Demodulating apparatus, receiving apparatus and demodulating method |
| JP4742311B2 (en) * | 2006-02-03 | 2011-08-10 | カシオ計算機株式会社 | OFDM receiving apparatus and OFDM receiving method |
| JP4692761B2 (en) * | 2006-03-29 | 2011-06-01 | カシオ計算機株式会社 | OFDM receiving apparatus, OFDM receiving method, and terrestrial digital receiving apparatus |
| JP5006097B2 (en) | 2007-04-24 | 2012-08-22 | 京セラ株式会社 | Reception control method and wireless communication apparatus |
| JP5098553B2 (en) | 2007-10-10 | 2012-12-12 | 富士通セミコンダクター株式会社 | OFDM receiving apparatus and OFDM receiving method |
| JP4626698B2 (en) | 2008-09-29 | 2011-02-09 | ソニー株式会社 | Information processing apparatus and method, display apparatus, and program |
| JP4655241B2 (en) * | 2008-09-30 | 2011-03-23 | ソニー株式会社 | Receiving device, receiving method, and program |
-
2002
- 2002-02-04 JP JP2002027064A patent/JP3996782B2/en not_active Expired - Fee Related
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