TWI456960B - 協調式多點傳輸系統之通訊方法 - Google Patents

協調式多點傳輸系統之通訊方法 Download PDF

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Publication number
TWI456960B
TWI456960B TW101103166A TW101103166A TWI456960B TW I456960 B TWI456960 B TW I456960B TW 101103166 A TW101103166 A TW 101103166A TW 101103166 A TW101103166 A TW 101103166A TW I456960 B TWI456960 B TW I456960B
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Taiwan
Prior art keywords
carrier frequency
frequency offset
signal
matrix
communication method
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TW101103166A
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TW201332324A (zh
Inventor
Yuh Ren Tsai
hao yun Huang
Chin Liang Wang
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Nat Univ Tsing Hua
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Priority to TW101103166A priority Critical patent/TWI456960B/zh
Priority to US13/527,973 priority patent/US8792446B2/en
Publication of TW201332324A publication Critical patent/TW201332324A/zh
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Publication of TWI456960B publication Critical patent/TWI456960B/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022Site diversity; Macro-diversity
    • H04B7/024Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Claims (8)

  1. 一種協調式多點傳輸系統之通訊方法,其包含下列步驟:選擇一Zadoff-Chu序列,以作為一前置序列;根據該前置序列經過一組循環位移產生複數個正交訓練序列;於複數個基地台設置該複數個正交訓練序列;從該複數個基地台以協調式多點傳輸方式傳送具有該複數個正交訓練序列之複數個前置訊號至一用戶設備端;以及利用該用戶設備端接收具有該複數個正交訓練序列之該複數個前置訊號之一混合訊號,其中該複數個正交訓練序列係符合下列一關係式:,且2kK;其中,〈MDk〉N實質上係趨近於;其中,N為該前置序列之長度,為基於N之同餘運算元,M為Zadoff-Chu序列中與N互質之相對應正整數參數,Dk為循環位移,k為正整數,K為該複數個基地台之個數,為近似符號,表示接近在一定範圍內。
  2. 如申請專利範圍第1項所述之協調式多點傳輸系統之通訊方法,其中該複數個基地台所設置之該複 數個正交訓練序列,係為符合該關係式之一正交訓練序列組之一子集合。
  3. 如申請專利範圍第1項所述之協調式多點傳輸系統之通訊方法,其包含下列步驟:同時地接收從複數個基地台發射具有該複數個正交訓練序列之該複數個前置訊號;根據該複數個前置訊號混合之該合成訊號估計該複數個基地台其中之一基地台之一訊號載波頻率偏移估計值及一對應通道增益估計值;根據該訊號載波頻率偏移估計值及該對應通道增益估計值計算從該複數個基地台其中之一基地台發射之一接收訊號估計值;根據複數個該訊號載波頻率偏移及該對應通道增益估計值計算一載波頻率偏移及一通道增益之一更新估測值,並增加一遞迴計算次數;當該遞迴計算次數達一預設次數時,則停止計算;以及根據該載波頻率偏移估計值調整一接收端之使用頻率,以補償該載波頻率偏移。
  4. 如申請專利範圍第3項所述之協調式多點傳輸系統之通訊方法,更包含下列步驟:當該遞迴計算次數未達該預設次數時,根據複數個該載波頻率偏移估計值及該通道增益估計值計 算從該複數個基地台之其中之一基地台發射之接收訊號估計值。
  5. 如申請專利範圍第3項所述之協調式多點傳輸系統之通訊方法,更包含下列步驟:藉由該接收訊號估計值估算該訊號載波頻率偏移估計值及該對應通道增益估計值。
  6. 如申請專利範圍第3項所述之協調式多點傳輸系統之通訊方法,其中該預設次數係為一最大遞迴計算次數。
  7. 如申請專利範圍第3項所述之協調式多點傳輸系統之通訊方法,其中,該載波頻率偏移係包含下列關係式: 其中,為載波頻率偏移估計更新值,i為遞迴次數,Φk為相位旋轉矩陣,Ak為前置序列矩陣,H表示矩陣共軛轉置, 為用戶設備端所接收的訊號估計,y為該複數個前置訊號混合之該合成訊號,係將目前載波頻率偏移估計值代入相位旋轉矩陣Φm的矩陣,為目前通道增益估計值,m為正整數。
  8. 如申請專利範圍第3項所述之協調式多點傳輸系 統之通訊方法,其中,該通道增益估測係包含下列關係式: 其中,為通道增益估計更新值,i為遞迴次數,Ak為前置序列矩陣,N為前置序列長度,係將目前載波頻率偏移估計值代入相位旋轉矩陣Φk的矩陣,H表示矩陣共軛轉置,T表示矩陣轉置, 為用戶設備端所接收的訊號估計,y為該複數個前置訊號混合之該合成訊號,係將目前載波頻率偏移估計值代入相位旋轉矩陣Φm的矩陣,為目的通道增益估計值,m為正整數。
TW101103166A 2012-01-31 2012-01-31 協調式多點傳輸系統之通訊方法 TWI456960B (zh)

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TW101103166A TWI456960B (zh) 2012-01-31 2012-01-31 協調式多點傳輸系統之通訊方法
US13/527,973 US8792446B2 (en) 2012-01-31 2012-06-20 Communication method of coordinated multi-point transmission systems

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TW101103166A TWI456960B (zh) 2012-01-31 2012-01-31 協調式多點傳輸系統之通訊方法

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GB2509162B (en) * 2012-12-21 2018-09-26 Sony Corp Telecommunications apparatus and methods
JP7119999B2 (ja) 2016-03-11 2022-08-17 ソニーグループ株式会社 サーバ装置及び方法
KR102564807B1 (ko) * 2016-11-24 2023-08-08 한국전자통신연구원 무선 통신 시스템의 채널 및 cfo의 추정 방법
TWI717736B (zh) 2019-05-15 2021-02-01 財團法人工業技術研究院 多天線系統及其通道校正方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110122789A1 (en) * 2008-05-09 2011-05-26 Thomas Haustein Multi-Cell Channel Estimation in 3G-LTE Based Virtual Pilot Sequences
WO2011147463A1 (en) * 2010-05-28 2011-12-01 Nokia Siemens Networks Oy Employing reference signals in communications

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110122789A1 (en) * 2008-05-09 2011-05-26 Thomas Haustein Multi-Cell Channel Estimation in 3G-LTE Based Virtual Pilot Sequences
WO2011147463A1 (en) * 2010-05-28 2011-12-01 Nokia Siemens Networks Oy Employing reference signals in communications

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US8792446B2 (en) 2014-07-29
US20130195024A1 (en) 2013-08-01

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