RU98100273A - Способ (варианты) и устройство с многопостанционным доступом в системах с кодовым разделением каналов с функцией одностороннего ограничения - Google Patents

Способ (варианты) и устройство с многопостанционным доступом в системах с кодовым разделением каналов с функцией одностороннего ограничения Download PDF

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RU98100273A
RU98100273A RU98100273/09A RU98100273A RU98100273A RU 98100273 A RU98100273 A RU 98100273A RU 98100273/09 A RU98100273/09 A RU 98100273/09A RU 98100273 A RU98100273 A RU 98100273A RU 98100273 A RU98100273 A RU 98100273A
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Russia
Prior art keywords
signal
amplitude
pulse
value
cdma signals
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RU98100273/09A
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English (en)
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Шашикант Бхагалиа (GB)
Шашикант Бхагалиа
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Апкател Юэс Эй
Апкател Юэс Эй, Инк.
Инк. (US)
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Priority claimed from GB9510870A external-priority patent/GB2301751B/en
Application filed by Апкател Юэс Эй, Апкател Юэс Эй, Инк., Инк. (US) filed Critical Апкател Юэс Эй
Publication of RU98100273A publication Critical patent/RU98100273A/ru

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Claims (24)

1. Способ обработки сигналов CDMA, характеризующийся тем, что извлекают сигналы CDMA из множества каналов; объединяют сигналы CDMA от множества каналов в итоговый сигнал; удаляют часть итогового сигнала выше и ниже желательного порогового диапазона для создания сигнала с ограниченной амплитудой.
2. Способ по п. 1, отличающийся тем, что сигналы CDMA имеют необходимую величину, уровень мощности и направление мощности, используемые в определении итогового сигнала.
3. Способ по п. 1, отличающийся тем, что величина мощности имеет первый уровень, соответствующий состоянию отбоя, и второй уровень, соответствующий снятию телефонной трубки.
4. Способ по п. 1, отличающийся тем, что удаленную часть итогового сигнала делают достаточной, чтобы предотвратить помехи от боковых полос, возникающих на ограниченном по амплитуде выходном сигнале.
5. Способ по п. 2, отличающийся тем, что величина итогового сигнала находится в диапазоне от -64 до +64 при нулевой величине блокировки, величина мощности составляет 1.4, а направление мощности может быть положительным или отрицательным.
6. Способ по п. 2, отличающийся тем, что указанный пороговый диапазон составляет приблизительно половину общего диапазона итогового сигнала.
7. Способ по п. 1, отличающийся тем, что дополнительно включает преобразование итогового сигнала в два отдельных канала данных для модулирования несущей передаваемого сигнала радиочастоты, причем каждый из двух отдельных каналов данных несет информацию конфигурации полуширины импульса, в которой первая половина импульса содержит нужную информацию, а вторая половина импульса возвращается в нулевой формат.
8. Способ по п. 7, отличающийся тем, что дополнительно осуществляют фильтрацию двух отдельных каналов данных для удаления помех вне желательной полосы радиочастот.
9. Способ в по п. 8, отличающийся тем, что фильтрация осуществляется фильтром нижних частот по функции Бесселя девятого порядка.
10. Способ по п. 8, отличающийся тем, что процесс фильтрация обеспечивает уменьшение межсимвольной интерференции между каждой полушириной импульса.
11. Способ обработки сигналов CDMA, характеризующийся тем, что извлекают сигналы CDMA из множества каналов; объединяют сигналы CDMA от множества каналов в итоговый сигнал; преобразуют итоговый сигнал в два отдельных канала данных для модулирования радиочастотной несущей передаваемого сигнала, причем каждый из двух отдельных каналов данных несет информацию конфигурации полуширины импульса, в которой первая половина импульса содержит нужную информацию, а вторая половина импульса возвращается в нулевой формат.
12. Способ по п. 11, отличающийся тем, что осуществляют фильтрацию двух отдельных каналов данных для удаления помех вне желательной полосы радиочастот.
13. Способ по п. 12, отличающийся тем, что фильтрация осуществляется фильтром нижних частот по функции Бесселя девятого порядка.
14. Способ по п. 8, отличающийся тем, что процесс фильтрации обеспечивает уменьшение межсимвольной интерференции между каждой полушириной импульса.
15. Способ в по п. 11, отличающийся тем, что удаляют часть итогового сигнала выше и ниже желательного порогового диапазона для создания сигнала с ограниченной амплитудой.
16. Способ по п. 15, отличающийся тем, что сигналы CDMA имеют необходимую величину блокировки, величину уровня мощности и величину направления мощности, используемые при определении итогового сигнала.
17. Способ по п. 16, отличающийся тем, что величина мощности имеет первый уровень, соответствующий состоянию отбоя и второй уровень, соответствующий состоянию снятия трубки.
18. Способ по п. 16, отличающийся тем, что удаленная часть итогового сигнала достаточна, чтобы предотвратить появления помех, вызванных боковыми полосами, в сигнале с ограниченной амплитудой.
19. Способ по п. 15, отличающийся тем, что удаленная часть итогового сигнала достаточна, чтобы предотвратить появления помех, вызванных боковыми полосами, в сигнале с ограниченной амплитудой.
20. Способ по п. 16, отличающийся тем, что величина итогового сигнала лежит в пределах от -64 до +64 при блокировке, величина уровня мощности в пределах от 1 до 4 и величина направления мощности положительна или отрицательна.
21. Способ по п. 15, отличающийся тем, что предпочтительный пороговый диапазон составляет приблизительно половину общего диапазона итогового сигнала.
22. Устройство для обработки сигналов CDMA, характеризующееся тем, что включает сумматор, предназначенный для сложения сигналов, поступающих из множества каналов, и для получения итогового сигнала из указанных сигналов; амплитудный ограничитель, предназначенный для удаления части итогового сигнала выше и ниже желательного порогового диапазона, причем ограничитель генерирует ограниченный по амплитуде сигнал; цифро-аналоговый преобразователь, предназначенный для преобразования ограниченного по амплитуде сигнала в формат кодирования полуширины сигнала, причем формат кодирования полуширины имеет информацию, содержащуюся в первой половине импульсного сигнала; указанный цифро-аналоговый преобразователь, преобразующий ограниченный по амплитуде сигнал в формат кодирования полуширины в аналоговый сигнал; фильтр, предназначенный для снижения межсимвольной интерференции аналогового сигнала.
23. Устройство по п. 21, отличающееся тем, что фильтр осуществляет фильтрацию нижних частот по функции Бесселя девятого порядка для сглаживания перехода от одного символа к другому.
24. Устройство по п. 21, отличающееся тем, что амплитудный ограничитель удаляет часть итогового сигнала, достаточную для предотвращения помех, вызванных боковыми полосами частот, в сигнале с ограниченной амплитудой.
RU98100273/09A 1995-06-02 1996-06-03 Способ (варианты) и устройство с многопостанционным доступом в системах с кодовым разделением каналов с функцией одностороннего ограничения RU98100273A (ru)

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GB9510870A GB2301751B (en) 1995-06-02 1995-06-02 Control message transmission in telecommunications systems
GB9511546A GB2301736B (en) 1995-06-02 1995-06-07 Apparatus and method of controlling transmitting power in a subscriber terminal of a wireless telecommunications systems
GB9511546.5 1995-06-07
GB9513388.0 1995-06-30
GB9608499 1996-06-03

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GB9513388D0 (en) 1995-09-06
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US5815798A (en) 1998-09-29
JPH11506583A (ja) 1999-06-08
WO1996038934A1 (en) 1996-12-05
DE69624110D1 (de) 2002-11-07
GB2301753A (en) 1996-12-11
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