RU2002107979A - METHOD AND DEVICE FOR DETECTING STAFF OF ZERO SPEED IN COMMUNICATION SYSTEM - Google Patents

METHOD AND DEVICE FOR DETECTING STAFF OF ZERO SPEED IN COMMUNICATION SYSTEM

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Publication number
RU2002107979A
RU2002107979A RU2002107979/09A RU2002107979A RU2002107979A RU 2002107979 A RU2002107979 A RU 2002107979A RU 2002107979/09 A RU2002107979/09 A RU 2002107979/09A RU 2002107979 A RU2002107979 A RU 2002107979A RU 2002107979 A RU2002107979 A RU 2002107979A
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frame
received
frames
decoded
threshold value
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RU2002107979/09A
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Russian (ru)
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RU2252487C2 (en
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Тао Чен
Шимман ПЭЙТЛ
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Квэлкомм Инкорпорейтед
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Priority claimed from US09/388,029 external-priority patent/US6208699B1/en
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Claims (28)

Способ идентификации кадров нулевой скорости в принимаемой передаче данных, при этом способ содержит следующие этапы прием модулированного сигнала, демодуляцию модулированного сигнала в соответствии с определенным форматом демодуляции в целях формирования демодулированных символов, разбиение демодулированных символов на множество принятых кадров, вычисление метрики качества для каждого кадра из множества принятых кадров, сравнение метрики качества для отдельного принятого кадра с пороговым значением, при этом пороговое значение выбирается, в частности, на основе метрик качества принятых кадров, идентификацию каждого принятого кадра как кадра нулевой или ненулевой скорости на основе результатов сравнения.A method for identifying zero-speed frames in a received data transmission, the method comprising the following steps of receiving a modulated signal, demodulating the modulated signal in accordance with a specific demodulation format in order to generate demodulated symbols, splitting the demodulated symbols into a plurality of received frames, calculating a quality metric for each frame from the set of received frames, comparing the quality metric for a single received frame with a threshold value, while the threshold value ybiraetsya, in particular based on the quality metrics of received frames, the identification of each received frame as a null frame or a non-zero rate based on the comparison results. 2. Способ по п.1, отличающийся тем, что метрика качества связана с энергией принятого кадра.2. The method according to claim 1, characterized in that the quality metric is related to the energy of the received frame. 3. Способ по п.2, отличающийся тем, что метрика качества для каждого принятого кадра рассчитывается как сумма квадратов символов принятого кадра.3. The method according to claim 2, characterized in that the quality metric for each received frame is calculated as the sum of the squares of the characters of the received frame. 4. Способ по п.1, отличающийся тем, что метрика качества связана с расстоянием между принятым кадром и кодовым словом, соответствующим принятому кадру.4. The method according to claim 1, characterized in that the quality metric is related to the distance between the received frame and the codeword corresponding to the received frame. 5. Способ по п.4, который дополнительно содержит декодирование каждого принятого кадра в декодированный кадр, повторное кодирование декодированного кадра в соответствии с форматом кодирования в целях формирования кодового слова для декодированного кадра.5. The method according to claim 4, which further comprises decoding each received frame into a decoded frame, re-encoding the decoded frame in accordance with the encoding format in order to generate a codeword for the decoded frame. 6. Способ по п.4, который дополнительно содержит этап декодирование каждого принятого кадра в декодированный кадр, при этом кодовое слово содержит в себе декодированный кадр.6. The method according to claim 4, which further comprises the step of decoding each received frame into a decoded frame, wherein the codeword comprises a decoded frame. 7. Способ по п.1, который дополнительно содержит этап декодирование каждого принятого кадра в соответствии с определенным предположением декодирования в целях получения декодированного кадра.7. The method according to claim 1, which further comprises the step of decoding each received frame in accordance with a specific decoding assumption in order to obtain a decoded frame. 8. Способ по п.7, отличающийся тем, что конкретное предположение декодирования включает в себя определенные формат кадра и скорость кадра, выбираемые из набора возможных форматов и скоростей.8. The method according to claim 7, characterized in that the specific decoding assumption includes certain frame format and frame rate, selected from a set of possible formats and speeds. 9. Способ по п.8, отличающийся тем, что набор возможных форматов кадра включает в себя кадры длительностью 5 мс и 20·L мс, где L - целое число, большее либо равное единице.9. The method according to claim 8, characterized in that the set of possible frame formats includes frames of 5 ms and 20 · L ms duration, where L is an integer greater than or equal to one. 10. Способ по п.8, отличающийся тем, что набор возможных скоростей кадра включает в себя полную скорость и скорости 1/2, 1/4 и 1/8.10. The method according to claim 8, characterized in that the set of possible frame rates includes full speed and speeds 1/2, 1/4 and 1/8. 11. Способ по п.7, отличающийся тем, что пороговое значение выбирается, в частности, на основе метрик качества декодированных кадров, которые были идентифицированы как хорошие кадры.11. The method according to claim 7, characterized in that the threshold value is selected, in particular, based on the quality metrics of the decoded frames that have been identified as good frames. 12. Способ по п.11, который дополнительно включает проверку битов ЦИК, связанных с декодированным кадром с целью определения, является ли декодированный кадр хорошим кадром.12. The method of claim 11, further comprising checking the CRC bits associated with the decoded frame to determine whether the decoded frame is a good frame. 13. Способ по п.7, отличающийся тем, что конкретный принятый кадр декодируется и идентифицируется как кадр, не являющийся хорошим.13. The method according to claim 7, characterized in that the specific received frame is decoded and identified as a frame that is not good. 14. Способ по п.1, отличающийся тем, что пороговое значение выбирается частично на основе статистических параметров метрик качества принятых кадров.14. The method according to claim 1, characterized in that the threshold value is partially selected based on the statistical parameters of the quality metrics of the received frames. 15. Способ по п.14, отличающийся тем, что для получения статистических параметров метрики качества принятых кадров обрабатываются с равными весами.15. The method according to 14, characterized in that to obtain statistical parameters, the quality metrics of the received frames are processed with equal weights. 16. Способ по п.14, отличающийся тем, что для получения статистических параметров метрики качества принятых кадров обрабатываются с неравными весами.16. The method according to 14, characterized in that to obtain statistical parameters, the quality metrics of the received frames are processed with unequal weights. 17. Способ по п.1, отличающийся тем, что величина порогового значения регулируется динамически.17. The method according to claim 1, characterized in that the threshold value is dynamically adjusted. 18. Способ по п.1, который дополнительно содержит этап денормализацию демодулированных символов энергией пилот-сигнала, передаваемого одновременно с передачей данных.18. The method according to claim 1, which further comprises the step of denormalizing the demodulated symbols with the energy of the pilot signal transmitted simultaneously with the data transmission. 19. Способ по п.1, отличающийся тем, что формат демодуляции определен согласно стандартам IS-2000 или IS-95-A.19. The method according to claim 1, characterized in that the demodulation format is defined according to the standards of IS-2000 or IS-95-A. 20. Подсистема приемника в системе связи, содержащая демодулятор, сконфигурированный для приема и демодуляции модулированного сигнала в соответствии с определенным форматом демодуляции с целью формирования демодулированных символов, процессор данных, оперативно подсоединенный к демодулятору, при этом процессор данных сконфигурирован для разбиения демодулированных символов на множество принятых кадров, вычисления метрики качества для каждого кадра из множества принятых кадров, сравнения метрики качества для отдельного принятого кадра с пороговым значением, при этом пороговое значение выбирается частично на основе метрик качества принятых кадров, идентификации отдельного принятого кадра как кадра нулевой или ненулевой скорости, исходя из результатов сравнения.20. A receiver subsystem in a communication system comprising a demodulator configured to receive and demodulate a modulated signal in accordance with a specific demodulation format to generate demodulated symbols, a data processor operatively connected to the demodulator, the data processor configured to split the demodulated symbols into a plurality of received frames, calculating the quality metric for each frame from the set of received frames, comparing the quality metrics for an individual received ra with the threshold value, the threshold value is selected based in part on the quality metrics of received frames, identify a particular received frame as a null frame or a non-zero speed, based on the comparison results. 21. Подсистема приемника по п.20, в которой процессор данных включает в себя схему накапливающего сумматора символов, сконфигурированную для приема и накопления демодулированных символов.21. The receiver subsystem according to claim 20, in which the data processor includes an accumulating symbol adder circuit configured to receive and accumulate demodulated symbols. 22. Подсистема приемника по п.20, в которой процессор данных включает в себя декодер, сконфигурированный для приема и декодирования множества принятых кадров с целью формирования множества декодированных кадров.22. The receiver subsystem of claim 20, wherein the data processor includes a decoder configured to receive and decode a plurality of received frames to form a plurality of decoded frames. 23. Подсистема приемника по п.22, в которой процессор данных дополнительно включает в себя схему проверки ЦИК, соединенную с декодером, при этом схема проверки ЦИК сконфигурирована для приема и проверки множества декодированных кадров с целью идентификации хороших кадров среди декодированных кадров.23. The receiver subsystem of claim 22, wherein the data processor further includes a CRC check circuit connected to a decoder, wherein the CRC check circuit is configured to receive and verify a plurality of decoded frames to identify good frames among the decoded frames. 24. Подсистема приемника по п.22, в которой процессор данных дополнительно включает в себя кодер, соединенный с декодером, при этом кодер сконфигурирован для приема и повторного кодирования декодированных кадров.24. The receiver subsystem of claim 22, wherein the data processor further includes an encoder connected to a decoder, wherein the encoder is configured to receive and re-encode decoded frames. 25. Подсистема приемника по п.20, в которой метрика качества связана с энергией принятого кадра.25. The receiver subsystem according to claim 20, in which the quality metric is related to the energy of the received frame. 26. Подсистема приемника по п.25, в которой метрика качества для принятого кадра рассчитывается как сумма квадратов символов принятого кадра.26. The receiver subsystem of claim 25, wherein the quality metric for the received frame is calculated as the sum of the squares of the characters of the received frame. 27. Подсистема приемника по п.20, в которой метрика качества связана с расстоянием между принятым кадром и ключевым словом, соответствующим принятому кадру.27. The receiver subsystem of claim 20, wherein the quality metric is related to the distance between the received frame and the keyword corresponding to the received frame. 28. Подсистема приемника в системе связи МДКР, способная идентифицировать кадры нулевой скорости в принимаемой передаче данных, при этом подсистема приемника включает в себя демодулятор, сконфигурированный для приема и демодуляции модулированного сигнала в соответствии с определенным форматом демодуляции в целях формирования демодулированных символов, декодер, оперативно соединенный с демодулятором, при этом декодер сконфигурирован для приема демодулированных символов как множества принятых кадров и декодирования множества принятых кадров во множество декодированных кадров, схему проверки ЦИК, соединенную с декодером, при этом схема проверки ЦИК сконфигурирована для приема и проверки множества декодированных кадров с целью идентификации хороших кадров среди декодированных кадров, блок вычисления метрики, оперативно соединенный с демодулятором или декодером, при этом блок вычисления метрики сконфигурирован для вычисления метрики качества для каждого кадра из множества принятых кадров, сравнения метрики качества для отдельного принятого кадра с пороговым значением, при этом пороговое значение выбирается частично на основе метрик качества принятых кадров, идентификации отдельного принятого кадра как кадра нулевой или ненулевой скорости, исходя из результатов сравнения.28. A receiver subsystem in a CDMA communication system capable of identifying zero-speed frames in a received data transmission, the receiver subsystem including a demodulator configured to receive and demodulate a modulated signal in accordance with a specific demodulation format in order to generate demodulated symbols, a decoder, operatively connected to a demodulator, wherein the decoder is configured to receive demodulated symbols as a plurality of received frames and to decode a plurality of received x frames into a plurality of decoded frames, a CEC verification circuitry connected to a decoder, wherein the CEC verification circuitry is configured to receive and verify a plurality of decoded frames to identify good frames among decoded frames, a metric calculation unit operatively connected to a demodulator or decoder, wherein the metric calculation unit is configured to calculate a quality metric for each frame from the set of received frames, comparing the quality metric for an individual received frame with a threshold value In this case, the threshold value is partially selected based on the quality metrics of the received frames, the identification of an individual received frame as a frame of zero or nonzero speed, based on the comparison results.
RU2002107979/09A 1999-09-01 2000-08-31 Method and device for detecting zero-speed frames in communication system RU2252487C2 (en)

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US09/388,029 US6208699B1 (en) 1999-09-01 1999-09-01 Method and apparatus for detecting zero rate frames in a communications system

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