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RU2005115879A - Передача с множеством несущих с использованием множества размеров символов ofdm - Google Patents

Передача с множеством несущих с использованием множества размеров символов ofdm Download PDF

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RU2005115879A
RU2005115879A RU2005115879/09A RU2005115879A RU2005115879A RU 2005115879 A RU2005115879 A RU 2005115879A RU 2005115879/09 A RU2005115879/09 A RU 2005115879/09A RU 2005115879 A RU2005115879 A RU 2005115879A RU 2005115879 A RU2005115879 A RU 2005115879A
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Джей Родни УОЛТОН (US)
Джей Родни УОЛТОН
Джон У. КЕТЧУМ (US)
Джон У. КЕТЧУМ
Марк УОЛЛЭЙС (US)
Марк УОЛЛЭЙС
Стивен Дж. ГОВАРД (US)
Стивен Дж. ГОВАРД
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Квэлкомм Инкорпорейтед (US)
Квэлкомм Инкорпорейтед
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0417—Feedback systems
    • H04B7/0421—Feedback systems utilizing implicit feedback, e.g. steered pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0667—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal
    • H04B7/0669—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal using different channel coding between antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0697—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using spatial multiplexing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/0842—Weighted combining
    • H04B7/0848—Joint weighting
    • H04B7/0854—Joint weighting using error minimizing algorithms, e.g. minimum mean squared error [MMSE], "cross-correlation" or matrix inversion
    • 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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
    • H04L1/0017—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy where the mode-switching is based on Quality of Service requirement
    • 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
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
    • H04L25/023—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols
    • H04L25/0232—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols by interpolation between sounding signals
    • 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
    • H04L25/024—Channel estimation channel estimation algorithms
    • H04L25/0242—Channel estimation channel estimation algorithms using matrix methods
    • H04L25/0248—Eigen-space methods
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0028—Variable division
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0037—Inter-user or inter-terminal allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0426—Power distribution
    • H04B7/043—Power distribution using best eigenmode, e.g. beam forming or beam steering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H04W28/20—Negotiating bandwidth
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/38—TPC being performed in particular situations
    • H04W52/50—TPC being performed in particular situations at the moment of starting communication in a multiple access environment

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Power Engineering (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)

Claims (50)

1. Способ передачи данных в коммуникационной системе с мультиплексированием с ортогональным делением частот (OFDM), включающий в себя этапы, на которых передают первый блок данных в первом OFDM символе первого размера и передают второй блок данных во втором OFDM символе второго размера, который отличается от первого размера.
2. Способ по п.1, в котором первый блок данных содержит управляющие данные, а второй блок данных содержит пользовательские данные.
3. Способ по п.2, в котором первый размер выбирают, основываясь на ожидаемом размере полезной нагрузки для управляющих данных, а второй размер выбирают, основываясь на ожидаемом размере полезной нагрузки для пользовательских данных.
4. Способ по п.1, в котором первый и второй блоки данных предназначены для пакета данных.
5. Способ по п.1, в котором первый блок данных предназначен для множества приемников, и второй блок данных предназначен для одного приемника.
6. Способ по п.1, дополнительно содержащий этап, на котором передают пилот-сигнал в третьем OFDM символе.
7. Способ по п.6, в котором пилот-сигнал представляет собой направленный опорный сигнал.
8. Способ по п.1, в котором каждую пару символов модуляции для второго OFDM символа одновременно передают в паре поддиапазонов через две антенны.
9. Способ по п.1, в котором циклические префиксы для первого и второго OFDM символов имеют одинаковую длину.
10. Способ по п.1, в котором циклические префиксы для первого и второго OFDM символов имеют разную длину.
11. Способ по п.1, в котором второй блок данных кодируют для получения значения обнаружения ошибки, которое передают во втором OFDM символе.
12. Способ по п.1, в котором первый и второй блоки данных подвергают перемежению по одинаковой схеме перемежения.
13. Способ по п.1, в котором отношение первого и второго размеров представляет собой степень 2.
14. Устройство в коммуникационной системе с мультиплексированием с ортогональным делением частот (OFDM), содержащее средство передачи первого блока данных в первом OFDM символе первого размера и средство передачи второго блока данных во втором OFDM символе второго размера, который отличается от первого размера.
15. Устройство по п.14, дополнительно содержащее средство передачи пилот-сигнала в третьем OFDM символе первого размера.
16. Блок передатчика в коммуникационной системе с мультиплексированием с ортогональным делением частот (OFDM), содержащий передающий (ТХ) процессор данных, выполненный с возможностью обработки первого блока данных для получения первого набора символов модуляции и обработки второго блока данных для получения второго набора символов модуляции, и модулятор, выполненный с возможностью обработки первого набора символов модуляции для получения первого OFDM символа первого размера и обработки второго набора символов модуляции для получения второго OFDM символа второго размера, который отличается от первого размера.
17. Блок передатчика по п.16, в котором модулятор выполнен с возможностью дополнительной обработки третьего набора символов модуляции пилот-сигнала для получения третьего OFDM символа пилот-сигнала.
18. Способ передачи данных в коммуникационной системе с мультиплексированием с ортогональным делением частот (OFDM), содержащий этапы, на которых передают управляющие данные в первом временном сегменте с первым OFDM символом первого размера и передают пользовательские данные во втором временном сегменте со вторым OFDM символом второго размера, который отличается от первого размера.
19. Способ по п.18, дополнительно содержащий этап, на котором передают пользовательские данные во втором сегменте с третьим OFDM символом третьего размера, который отличается от второго размера.
20. Способ по п.18, дополнительно содержащий этап, на котором передают пилот-сигнал в третьем временном сегменте с третьим OFDM символом.
21. Способ по п.18, в котором первый и второй размеры фиксированы.
22. Способ по п.18, в котором первый и второй размеры конфигурируются.
23. Способ приема данных в коммуникационной системе с мультиплексированием с ортогональным делением частот (OFDM), включающий в себя этапы, на которых принимают первый OFDM символ первого размера для первого блока данных и принимают второй OFDM символ второго размера для второго блока данных, причем второй размер отличается от первого размера.
24. Способ по п.23, в котором первый блок данных содержит управляющие данные, а второй блок данных содержит пользовательские данные.
25. Способ по п.23, в котором первый и второй блоки данных предназначены для пакета данных.
26. Способ по п.23, дополнительно содержащий этап, на котором принимают третий OFDM символ для пилот-сигнала.
27. Способ по п.26, дополнительно содержащий этап, на котором обрабатывают третий OFDM символ для получения оценки канала для каждого из множества поддиапазонов.
28. Способ по п.27, дополнительно содержащий этап, на котором выполняют интерполяцию оценок каналов для множества поддиапазонов для получения оценки канала для дополнительного поддиапазона, не входящего в состав указанного множества поддиапазонов.
29. Устройство в коммуникационной системе с мультиплексированием с ортогональным делением частот (OFDM), содержащее средство приема первого OFDM символа первого размера для первого блока данных и средство приема второго OFDM символа второго размера для второго блока данных, причем второй размер отличается от первого размера.
30. Устройство по п.29, дополнительно содержащее средство приема третьего OFDM символа для пилот-сигнала и средство обработки третьего OFDM символа для получения оценки канала для каждого из множества поддиапазонов.
31. Устройство по п.30, содержащее средство выполнения интерполяции оценок каналов для множества поддиапазонов для получения оценки канала для дополнительного поддиапазона, не входящего в состав указанного множества поддиапазонов.
32. Блок приемника в коммуникационной системе с мультиплексированием с ортогональным делением частот (OFDM), содержащий демодулятор, выполненный с возможностью обработки первого OFDM символа первого размера для получения первого набора принятых символов модуляции и обработки второго OFDM символа второго размера для получения второго набора принятых символов модуляции, причем второй размер отличается от первого размера; и приемный (RX) процессор данных, выполненный с возможностью обработки первого набора принятых символов модуляции для получения первого блока данных и для обработки второго набора принятых символов модуляции для получения второго блока данных.
33. Блок приемника по п.32, в котором демодулятор выполнен с возможностью дополнительной обработки третьего OFDM символа для пилот-сигнала для обеспечения оценки канала для каждого из множества поддиапазонов.
34. Блок приемника по п.33, дополнительно содержащий контроллер, выполненный с возможностью интерполяции оценок каналов для множества поддиапазонов для получения оценки канала для дополнительного поддиапазона, не входящего в состав указанного множества поддиапазонов.
35. Способ обработки пилот-сигнала в коммуникационной системе с мультиплексированием с ортогональным делением частот (OFDM) с множеством входов и множеством выходов (MIMO), содержащий этапы, на которых принимают первый набор OFDM символов от первого набора антенн для пилот-сигнала; обрабатывают первый набор OFDM символов для получения матрицы отклика канала для каждого из множества поддиапазонов и выполняют разложение матрицы отклика канала для каждого из множества поддиапазонов для получения унитарной матрицы собственных векторов для матрицы отклика канала, причем разложение выполняют способом, позволяющим устранить случайные сдвиги фаз от поддиапазона к поддиапазону.
36. Способ по п.35, в котором случайные сдвиги фаз от поддиапазона к поддиапазону устраняют путем ограничения первого элемента в каждом столбце унитарной матрицы, заключающегося в том, что указанный первый элемент имеет неотрицательное значение.
37. Способ по п.36, дополнительно содержащий этапы, на которых генерируют направленный опорный сигнал, основываясь на конкретном столбце унитарной матрицы для каждого из множества поддиапазонов, и передают второй набор OFDM символов через набор антенн для направленного опорного сигнала.
38. Способ обработки направленного опорного сигнала в коммуникационной системе с мультиплексированием с ортогональным делением частот (OFDM) с множеством входов и множеством выходов (MIMO), содержащий этапы, на которых принимают первый набор OFDM символов от первого набора антенн для направленного опорного сигнала; обрабатывают первый набор OFDM символов для получения направляющего вектора для каждого из множества поддиапазонов и выполняют интерполяцию направляющих векторов для множества поддиапазонов для получения направляющего вектора для дополнительного поддиапазона, не входящего в состав указанного множества поддиапазонов.
39. Способ передачи единицы данных, имеющей размер единицы данных в коммуникационной системе с мультиплексированием с ортогональным делением частот (OFDM), указанный способ содержит этапы, на которых выбирают первый размер OFDM символа из набора размеров OFDM символов, причем набор размеров OFDM символов содержит размер большого OFDM символа и размер маленького OFDM символа, меньшего, чем размер большого OFDM символа, и передают первую часть единицы данных в OFDM символе, имеющем первый размер OFDM символа.
40. Способ по п.39, в котором выбор первого размера OFDM символа основан на размере единицы данных.
41. Способ по п.39, в котором единица данных имеет тип единицы данных, и выбор первого размера OFDM символа основан на типе единицы данных.
42. Способ по п.39, дополнительно содержащий этапы, на которых выбирают второй размер OFDM символа из набора размеров OFDM символов и передают вторую часть единицы данных во втором OFDM символе, имеющем второй размер OFDM символа.
43. Способ по п.42, в котором первый размер OFDM символа равен второму размеру OFDM символа.
44. Способ по п.42, в котором первый размер OFDM символа больше, чем второй размер OFDM символа.
45. Устройство в коммуникационной системе с мультиплексированием с ортогональным делением частот (OFDM), содержащее средство выбора первого размера OFDM символа из набора размеров OFDM символов, причем набор размеров OFDM символов содержит размер большого OFDM символа и размер маленького OFDM символа, меньшего, чем размер большого OFDM символа, и средство передачи первой части единицы данных в OFDM символе, имеющем первый размер OFDM символа.
46. Устройство по п.45, дополнительно содержащее средство выбора второго размера OFDM символа из набора размеров OFDM символов и средство передачи второй части единицы данных во втором OFDM символе, имеющем второй размер OFDM символа.
47. Устройство по п.45, в котором первый размер OFDM символа выбирают, основываясь на размере единицы данных указанной единицы данных.
48. Устройство по п.45, в котором размер первого OFDM символа выбирают, основываясь на типе единицы данных указанной единицы данных.
49. Блок передатчика в коммуникационной системе с мультиплексированием с ортогональным делением частот (OFDM), содержащий контроллер, выполненный с возможностью выбора первого размера OFDM символа из набора размеров OFDM символов, причем набор размеров OFDM символов содержит размер большого OFDM символа и размер маленького OFDM символа, меньшего, чем размер большого OFDM символа, и модулятор, выполненный с возможностью обработки первой части единицы данных для получения OFDM символа, имеющего первый размер OFDM символа.
50. Блок передатчика по п.49, в котором контроллер выполнен с возможностью дополнительного выбора второго размера OFDM символа из набора размеров OFDM символов, и модулятор выполнен с возможностью дополнительной обработки второй части единицы данных для получения второго OFDM символа, имеющего второй размер OFDM символа.
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