JP2010034819A5 - - Google Patents

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Publication number
JP2010034819A5
JP2010034819A5 JP2008194494A JP2008194494A JP2010034819A5 JP 2010034819 A5 JP2010034819 A5 JP 2010034819A5 JP 2008194494 A JP2008194494 A JP 2008194494A JP 2008194494 A JP2008194494 A JP 2008194494A JP 2010034819 A5 JP2010034819 A5 JP 2010034819A5
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JP
Japan
Prior art keywords
base station
ofdm signal
station apparatus
estimated value
carrier frequency
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JP2008194494A
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Japanese (ja)
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JP2010034819A (en
JP5083096B2 (en
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Priority claimed from JP2008194494A external-priority patent/JP5083096B2/en
Priority to JP2008194494A priority Critical patent/JP5083096B2/en
Priority to KR1020117000946A priority patent/KR20110026479A/en
Priority to PCT/JP2009/060756 priority patent/WO2010004830A1/en
Priority to US13/003,189 priority patent/US8929191B2/en
Priority to EP09794277A priority patent/EP2299761A1/en
Priority to CN2009801265543A priority patent/CN102090118B/en
Priority to CA2729631A priority patent/CA2729631A1/en
Publication of JP2010034819A publication Critical patent/JP2010034819A/en
Publication of JP2010034819A5 publication Critical patent/JP2010034819A5/ja
Publication of JP5083096B2 publication Critical patent/JP5083096B2/en
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Expired - Fee Related legal-status Critical Current
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Claims (11)

端末装置との間で時分割複信によってＯＦＤＭ信号の無線通信を行うよう構成されているとともに、動作クロックを発生させる内蔵クロック発生器を備え、前記内蔵クロック発生器によって発生するクロック周波数の精度によってＯＦＤＭ信号のキャリア周波数の精度が影響を受ける基地局装置であって、
端末装置への送信停止中に他の基地局装置から送信されたＯＦＤＭ信号を受信する手段と、
端末装置への送信停止中に受信したＯＦＤＭ信号に基づいて、そのＯＦＤＭ信号のキャリア周波数オフセットの推定値を求める推定手段と、
前記推定値に基づいて、端末装置へ送信されるＯＦＤＭ信号のキャリア周波数を補正する周波数補正手段と、
を備えることを特徴とする基地局装置。 It is configured to perform OFDM signal wireless communication with a terminal device by time division duplex, and includes a built-in clock generator that generates an operation clock, and according to the accuracy of the clock frequency generated by the built-in clock generator. A base station apparatus in which the accuracy of the carrier frequency of the OFDM signal is affected,
Means for receiving an OFDM signal transmitted from another base station device while transmission to the terminal device is stopped;
Based on the OFDM signal received while transmission to the terminal device is stopped, estimating means for obtaining an estimated value of the carrier frequency offset of the OFDM signal;
Frequency correcting means for correcting the carrier frequency of the OFDM signal transmitted to the terminal device based on the estimated value;
A base station apparatus comprising: 前記推定手段は、端末装置への送信停止中に受信したＯＦＤＭ信号に基づいて、そのＯＦＤＭ信号の通信タイミングオフセットの推定値を求め、通信タイミングオフセットの推定値に基づいて、そのＯＦＤＭ信号のキャリア周波数オフセットの推定値を求めるよう構成されている請求項１記載の基地局装置。   The estimation means obtains an estimated value of the communication timing offset of the OFDM signal based on the OFDM signal received while transmission to the terminal apparatus is stopped, and determines the carrier frequency of the OFDM signal based on the estimated value of the communication timing offset. The base station apparatus according to claim 1, wherein the base station apparatus is configured to obtain an estimated value of an offset. 前記推定手段は、
第１の送信停止時点において求めた通信タイミングオフセットの第１推定値と、前記第１の送信停止時点とは異なる時点である第２の送信停止時点において求めた通信タイミングオフセットの第２推定値と、の差分に基づいて、第１送信停止時点と第２送信停止時点との間におけるＯＦＤＭ信号の位相回転量を算出する位相回転量算出手段と、
前記位相回転量に基づいて、前記クロック周波数の誤差を算出するクロック誤差算出手段と、
を有するとともに、算出された前記クロック周波数の誤差に基づいて、前記キャリア周波数オフセットの推定値を求める、
ものである請求項２記載の基地局装置。 The estimation means includes
A first estimated value of the communication timing offset obtained at the first transmission stop time, and a second estimated value of the communication timing offset obtained at the second transmission stop time that is a time different from the first transmission stop time; Phase rotation amount calculating means for calculating the phase rotation amount of the OFDM signal between the first transmission stop time and the second transmission stop time based on the difference between
Clock error calculating means for calculating an error of the clock frequency based on the phase rotation amount;
And obtaining an estimated value of the carrier frequency offset based on the calculated error of the clock frequency.
The base station apparatus according to claim 2, wherein 前記通信タイミングオフセットの推定値に基づいて、通信フレームタイミングを補正する手段を更に備える請求項２又は３記載の基地局装置。   The base station apparatus according to claim 2, further comprising means for correcting a communication frame timing based on the estimated value of the communication timing offset. 端末装置への送信停止中に他の基地局装置から受信するＯＦＤＭ信号は、前記他の基地局装置が端末装置に対して送信したプリアンブル信号である請求項１〜４のいずれか１項に記載の基地局装置。   The OFDM signal received from another base station apparatus while transmission to the terminal apparatus is stopped is a preamble signal transmitted from the other base station apparatus to the terminal apparatus. Base station equipment. 前記周波数補正手段は、前記キャリア周波数オフセットの前記推定値に基づいて、受信したＯＦＤＭ信号のキャリア周波数を補正する請求項１〜５のいずれか１項に記載の基地局装置。   The base station apparatus according to claim 1, wherein the frequency correction unit corrects a carrier frequency of the received OFDM signal based on the estimated value of the carrier frequency offset. 端末装置への送信停止を周期的に行う請求項１〜６のいずれか１項に記載の基地局装置。   The base station apparatus according to claim 1, wherein transmission to the terminal apparatus is periodically stopped. 受信したＯＦＤＭ信号のキャリア周波数、及び、送信するＯＦＤＭ信号のキャリア周波数の精度が、同一の前記内蔵クロック発生器によって発生するクロック周波数の精度によって、影響を受けるよう構成されている請求項１〜７のいずれか１項に記載の基地局装置。  8. The carrier frequency of the received OFDM signal and the accuracy of the carrier frequency of the OFDM signal to be transmitted are configured to be influenced by the accuracy of the clock frequency generated by the same built-in clock generator. The base station apparatus according to any one of the above. 受信したＯＦＤＭ信号をＡ／Ｄ変換するＡ／Ｄ変換部と、  An A / D converter for A / D converting the received OFDM signal;
送信するＯＦＤＭ信号をＤ／Ａ変換するＤ／Ａ変換部と、  A D / A converter for D / A converting an OFDM signal to be transmitted;
を備え、With
前記内部クロック発生器によって発生するクロックは、前記Ａ／Ｄ変換部及び前記Ｄ／Ａ変換部にも与えられる  The clock generated by the internal clock generator is also supplied to the A / D converter and the D / A converter.
請求項１〜８のいずれか１項に記載の基地局装置。  The base station apparatus of any one of Claims 1-8. 前記推定手段及び前記周波数補正手段による処理は、デジタル信号処理プロセッサによって行われる  The processing by the estimation means and the frequency correction means is performed by a digital signal processor.
請求項１〜９のいずれか１項に記載の基地局装置。  The base station apparatus of any one of Claims 1-9. 前記推定手段は、端末装置への送信停止中に受信したＯＦＤＭ信号に基づいて、前記他の基地局装置に対するクロック周波数誤差を算出し、算出された前記クロック周波数誤差に基づいて、前記キャリア周波数オフセットの推定値を求める  The estimation means calculates a clock frequency error for the other base station device based on the OFDM signal received while transmission to the terminal device is stopped, and based on the calculated clock frequency error, the carrier frequency offset Find an estimate of
請求項１〜１０のいずれか１項に記載の基地局装置。  The base station apparatus of any one of Claims 1-10.
JP2008194494A 2008-07-07 2008-07-29 Base station equipment Expired - Fee Related JP5083096B2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP2008194494A JP5083096B2 (en) 2008-07-29 2008-07-29 Base station equipment
EP09794277A EP2299761A1 (en) 2008-07-07 2009-06-12 Base station device
PCT/JP2009/060756 WO2010004830A1 (en) 2008-07-07 2009-06-12 Base station device
US13/003,189 US8929191B2 (en) 2008-07-07 2009-06-12 Base station device for wireless communication of OFDM signal including a synchronization control unit
KR1020117000946A KR20110026479A (en) 2008-07-07 2009-06-12 Base station device
CN2009801265543A CN102090118B (en) 2008-07-07 2009-06-12 Base station device
CA2729631A CA2729631A1 (en) 2008-07-07 2009-06-12 Base station device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008194494A JP5083096B2 (en) 2008-07-29 2008-07-29 Base station equipment

Publications (3)

Publication Number Publication Date
JP2010034819A JP2010034819A (en) 2010-02-12
JP2010034819A5 true JP2010034819A5 (en) 2011-12-01
JP5083096B2 JP5083096B2 (en) 2012-11-28

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JP2008194494A Expired - Fee Related JP5083096B2 (en) 2008-07-07 2008-07-29 Base station equipment

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140072194A (en) * 2011-10-06 2014-06-12 매사추세츠 인스티튜트 오브 테크놀로지 Coherent transmission from distributed wireless transmitters
JP6151559B2 (en) * 2013-05-17 2017-06-21 京セラ株式会社 Base station and synchronization method thereof
JP2015056868A (en) * 2013-09-13 2015-03-23 京セラ株式会社 Base station and communication control method
JP2015056869A (en) * 2013-09-13 2015-03-23 京セラ株式会社 Base station and communication control method
JP6834268B2 (en) * 2016-09-06 2021-02-24 日本電気株式会社 Wireless communication equipment and wireless communication system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003124872A (en) * 2001-10-16 2003-04-25 Mitsubishi Electric Corp Mobile communication system
DE10331313B3 (en) * 2003-07-10 2005-01-05 Siemens Ag Method for synchronizing a radio communication system divided into radio cells
JP2007208333A (en) * 2006-01-30 2007-08-16 Kyocera Corp Base station apparatus

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