RU2007128073A - Оценка канала для подавления помех - Google Patents

Оценка канала для подавления помех Download PDF

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Publication number
RU2007128073A
RU2007128073A RU2007128073/09A RU2007128073A RU2007128073A RU 2007128073 A RU2007128073 A RU 2007128073A RU 2007128073/09 A RU2007128073/09 A RU 2007128073/09A RU 2007128073 A RU2007128073 A RU 2007128073A RU 2007128073 A RU2007128073 A RU 2007128073A
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RU2007128073/09A
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RU2364023C2 (ru
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Джон Эдвард СМИ (US)
Джон Эдвард Сми
Генри Дэвид ПФИСТЕР (US)
Генри Дэвид ПФИСТЕР
Цзилэй ХОУ (US)
Цзилэй ХОУ
Стефано ТОМАЗИН (IT)
Стефано Томазин
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Квэлкомм Инкорпорейтед (US)
Квэлкомм Инкорпорейтед
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details 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
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • H04B1/7107—Subtractive interference cancellation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details 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
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
    • H04B1/7117—Selection, re-selection, allocation or re-allocation of paths to fingers, e.g. timing offset control of allocated fingers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details 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
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • H04B1/7105—Joint detection techniques, e.g. linear detectors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B15/00—Suppression or limitation of noise or interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details 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
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details 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
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • H04B1/7107—Subtractive interference cancellation
    • H04B2001/71077—Partial interference cancellation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70701—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation featuring pilot assisted reception
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0212—Channel estimation of impulse response

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Noise Elimination (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Claims (17)

1. Способ, содержащий этапы, на которых:
принимают выборки данных сигналов, переданных от множества терминалов доступа;
выполняют сжатие спектра принятых выборок данных с использованием элементарных сигналов пилот-сигнала, связанных с первым терминалом доступа;
демодулируют сжатые выборки данных для получения символов данных;
декодируют демодулированные символы данных;
определяют, были ли демодулированные символы данных декодированы правильно;
если демодулированные символы данных были декодированы правильно, то используют декодированные, демодулированные символы данных для регенерации элементарных сигналов данных, переданных первым терминалом доступа;
выполняют сжатие спектра принятых выборок данных с использованием регенерированных переданных элементарных сигналов данных, чтобы определить оценку канала;
сохраняют выборки данных, принятые от множества терминалов доступа, в буфере;
используют полученную оценку канала для восстановления выборок данных, переданных из первого терминала доступа; и
вычитают восстановленные выборки данных, переданные из первого терминала доступа, из сохраненных в буфере выборок данных.
2. Способ по п.1, в котором элементарные сигналы пилот-сигнала покрываются псевдослучайной шумовой (ПШ) последовательностью.
3. Способ по п.1, в котором сигналы содержат сигналы множественного доступа с кодовым разделением (CDMA).
4. Способ по п.1, дополнительно содержащий этап, на котором накапливают выборки сжатых данных в течение периода времени.
5. Способ по п.1, в котором этап сжатия принятых выборок данных с использованием регенерированных, переданных элементарных сигналов данных для определения оценки канала выполняют при каждой задержке отвода многоотводного приемника из множества задержек отводов многоотводного приемника.
6. Способ по п.1, в котором этап регенерации элементарных сигналов данных, переданных первым терминалом доступа, содержит, по меньшей мере, одно из повторного кодирования, повторного перемежения, повторной модуляции, повторного применения усиления канала данных и повторного расширения спектра данных.
7. Способ по п.1, дополнительно содержащий этапы, на которых:
выполняют сжатие принятых выборок данных с использованием элементарных сигналов псевдослучайного шума (ПШ) пилот-сигнала, связанных со вторым терминалом доступа;
демодулируют выборки сжатых данных для получения символов данных;
декодируют демодулированные символы данных;
определяют, были ли демодулированные символы данных декодированы правильно; и
если демодулированные символы данных были декодированы правильно, то используют декодированные, демодулированные символы данных для регенерации элементарных сигналов данных, переданных вторым терминалом доступа, при каждой задержке отвода многоотводного приемника.
8. Базовая станция, содержащая:
память, сконфигурированную для хранения выборок данных сигналов, принятых от множества терминалов доступа;
демодулятор, выполненный с возможностью сжатия и демодуляции сохраненных выборок данных с использованием первой кодовой последовательности, соответствующей первому терминалу доступа;
декодер, выполненный с возможностью декодирования данных из демодулированных данных;
блок регенерации, выполненный с возможностью использования правильно декодированных данных для регенерации элементарных сигналов данных, переданных первым терминалом доступа;
блок оценки канала, выполненный с возможностью сжатия сохраненных выборок данных с использованием регенерированных элементарных сигналов данных для определения оценки канала;
блок восстановления, выполненный с возможностью использования декодированных данных и оценки канала для восстановления элементарных сигналов кодированных и модулированных данных; и
узел вычитания, выполненный с возможностью вычитания восстановленных выборок данных из выборок, сохранных в памяти, чтобы уменьшить помехи для декодера для последующего декодирования данных для других терминалов доступа из сохраненных выборок.
9. Базовая станция по п.8, дополнительно содержащая накопитель для накопления в течение некоторого периода времени сжатых выборок данных.
10. Базовая станция по п.8, в которой демодулятор содержит многоотводный приемник со множеством блоков обработки отводов для обработки многолучевых сигналов, причем каждый блок обработки отвода имеет однородно определенную задержку для обработки выборок из памяти.
11. Базовая станция по п.8, в которой узел регенерации, выполнен с возможностью регенерации элементарных сигналов данных, переданных первым терминалом доступа, путем, по меньшей мере, одного из повторного кодирования, повторного перемежения, повторной модуляции, повторного применения усиления канала данных и повторного расширения спектра.
12. Базовая станция по п.8, в которой первая кодовая последовательность представляет собой псевдослучайную шумовую (ПШ) последовательность.
13. Способ, содержащий этапы, на которых:
принимают выборки данных сигналов, переданных от множества терминалов доступа;
выполняют сжатие принятых выборок данных с использованием элементарных сигналов пилот-сигнала, связанных с первым терминалом доступа;
демодулируют сжатые выборки данных для получения символов данных;
декодируют демодулированные символы данных;
определяют, были ли демодулированные символы данных декодированы правильно;
если демодулированные символы данных были декодированы правильно, то используют декодированные, демодулированные символы данных для регенерации элементарных сигналов данных, переданных первым терминалом доступа;
на основании оцененных задержек многолучевого сигнала определяют временной период для равномерной регенерации; и
выполняют сжатие принятых выборок данных с использованием переданных элементарных сигналов данных, регенерированных при равномерных задержках для определенного временного периода, чтобы определить оценку канала.
14. Способ по п.13, в котором элементарные сигналы пилот-сигнала покрывают псевдослучайной шумовой (ПШ) последовательностью.
15. Способ по п.13, дополнительно содержащий этапы, на которых:
сохраняют выборки данных, принятые от множества терминалов доступа, в буфере;
используют определенную оценку канала для восстановления выборок данных, переданных из первого терминала доступа; и
вычитают восстановленные выборки данных, переданные из первого терминала доступа, из сохраненных в буфере выборок данных.
16. Способ по п.13, в котором этап определения временного периода содержит этап, на котором выбирают временной период на основании информации о задержках многолучевого сигнала и априорной оценки комбинированной характеристики фильтров передатчика и приемника.
17. Устройство, содержащее:
средство для приема выборок данных сигналов, переданных от множества терминалов доступа;
средство для сжатия принятых выборок данных с использованием элементарных сигналов пилот-сигнала, связанных с первым терминалом доступа;
средство для демодуляции сжатых выборок данных для получения символов данных;
средство для декодирования демодулированных символов данных;
средство для определения, были ли демодулированные символы данных декодированы правильно;
средство для использования декодированных, демодулированных символов данных для регенерации элементарных сигналов данных, переданных первым терминалом доступа, если демодулированные символы данных были декодированы правильно;
средство для определения временного периода для равномерной регенерации на основании оцененных задержек многолучевого сигнала; и
средство для сжатия принятых выборок данных с использованием переданных элементарных сигналов данных, регенерированных при равномерных задержках для определенного временного периода, чтобы определить оценку канала.
RU2007128073/09A 2004-12-23 2005-12-22 Оценка канала для подавления помех RU2364023C2 (ru)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US63866604P 2004-12-23 2004-12-23
US60/638,666 2004-12-23
US11/192,503 2005-07-29
US11/192,503 US8422955B2 (en) 2004-12-23 2005-07-29 Channel estimation for interference cancellation

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RU2007128073A true RU2007128073A (ru) 2009-01-27
RU2364023C2 RU2364023C2 (ru) 2009-08-10

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US (1) US8422955B2 (ru)
EP (2) EP2204916B1 (ru)
JP (1) JP4567751B2 (ru)
KR (1) KR100938730B1 (ru)
CN (1) CN102035569B (ru)
AU (1) AU2005321821B2 (ru)
BR (1) BRPI0519545A2 (ru)
CA (1) CA2592496A1 (ru)
IL (1) IL184022A0 (ru)
MX (1) MX2007007768A (ru)
NO (1) NO20073237L (ru)
RU (1) RU2364023C2 (ru)
TW (1) TW200703942A (ru)
WO (1) WO2006072088A1 (ru)

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AU2005321821B2 (en) 2010-05-27
EP2204916A1 (en) 2010-07-07
CA2592496A1 (en) 2006-07-06
US20060141933A1 (en) 2006-06-29
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AU2005321821A1 (en) 2006-07-06
EP1834417B1 (en) 2018-12-12
EP2204916B1 (en) 2019-07-24
IL184022A0 (en) 2007-10-31
WO2006072088A1 (en) 2006-07-06
CN102035569A (zh) 2011-04-27
KR20070091214A (ko) 2007-09-07
CN102035569B (zh) 2013-10-09
TW200703942A (en) 2007-01-16
RU2364023C2 (ru) 2009-08-10
US8422955B2 (en) 2013-04-16
NO20073237L (no) 2007-09-21
KR100938730B1 (ko) 2010-01-26

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