RU96122871A - MULTI-STATION ACCESS SYSTEM COAGER RECEIVER WITH CODE SEPARATION OF CHANNELS WITH SEQUENCE FOR DIRECT MODULATION OF THE CARRIER LAND-FLIGHT EQUIPMENT - Google Patents

MULTI-STATION ACCESS SYSTEM COAGER RECEIVER WITH CODE SEPARATION OF CHANNELS WITH SEQUENCE FOR DIRECT MODULATION OF THE CARRIER LAND-FLIGHT EQUIPMENT

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Publication number
RU96122871A
RU96122871A RU96122871/09A RU96122871A RU96122871A RU 96122871 A RU96122871 A RU 96122871A RU 96122871/09 A RU96122871/09 A RU 96122871/09A RU 96122871 A RU96122871 A RU 96122871A RU 96122871 A RU96122871 A RU 96122871A
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channel
signal
control channel
data
coefficients
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RU96122871/09A
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Russian (ru)
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RU2152686C1 (en
Inventor
Микаэль Тедер Пауль
Эвербринг Ларс-Магнус
Густав Брисмарк Ларс
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Телефонактиеболагет Лм Эрикссон
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Priority claimed from US08/235,527 external-priority patent/US5544156A/en
Application filed by Телефонактиеболагет Лм Эрикссон filed Critical Телефонактиеболагет Лм Эрикссон
Publication of RU96122871A publication Critical patent/RU96122871A/en
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Claims (21)

1. Система связи, содержащая средство для приема сигнала, включающего в себя канал данных, имеющий поле данных с переменной скоростью передачи, и канал управления, связанный с упомянутым каналом данных, причем упомянутый канал управления включает в себя информацию, определяющую скорость передачи упомянутого поля данных с переменной скоростью передачи, средство демодуляции упомянутого канала управления и формирования из него канальной информации; и средство когерентной демодуляции упомянутого канала данных, с использованием канальной информации, полученной упомянутым средством демодуляции упомянутого канала управления.1. A communication system comprising means for receiving a signal including a data channel having a data field with a variable transmission rate, and a control channel associated with said data channel, said control channel including information determining a transmission rate of said data field with a variable transmission rate, a means of demodulating said control channel and forming channel information from it; and means for coherently demodulating said data channel using channel information obtained by said demodulating means of said control channel. 2. Система по п. 1, отличающаяся тем, что содержит средство для определения оценки канала на основании входного сигнала канальной информации с упомянутого средства демодуляции упомянутого канала управления; и средство для обеспечения параметрами оценки канала упомянутого средства когерентной демодуляции упомянутого канала данных, в котором средство демодуляции канала данных использует упомянутые параметры оценки канала для когерентной демодуляции канала данных. 2. The system of claim 1, characterized in that it comprises means for determining a channel estimate based on an input channel information signal from said demodulation means of said control channel; and means for providing channel estimation parameters to said coherent demodulation means of said data channel, wherein the data channel demodulation means uses said channel estimation parameters to coherently demodulate the data channel. 3. Система по п.1, отличающаяся тем, что канальная информация включает в себя по меньшей мере одну из величин: результаты свертки, коэффициенты и модулирующие биты упомянутого канала управления. 3. The system according to claim 1, characterized in that the channel information includes at least one of the values: convolution results, coefficients and modulating bits of said control channel. 4. Система по п. 2, отличающаяся тем, что канальная информация включает в себя по меньшей мере одну из величин: результаты свертки, коэффициенты и модулирующие биты упомянутого канала управления. 4. The system according to claim 2, characterized in that the channel information includes at least one of the values: convolution results, coefficients, and modulating bits of said control channel. 5. Система по п.4, отличающаяся тем, что упомянутое средство для определения оценки канала дополнительно содержит средство для оценки задержек излучений в упомянутом принятом сигнале на основании упомянутого принятого сигнала и упомянутых коэффициентов. 5. The system according to claim 4, characterized in that said means for determining the channel estimate further comprises means for estimating radiation delays in said received signal based on said received signal and said coefficients. 6. Система по п.5, отличающаяся тем, что упомянутое средство для определения оценки канала дополнительно содержит средство для оценки комплексной амплитуды излучений в упомянутом принятом сигнале линии связи Земля - летательный аппарат на основании упомянутых результатов свертки упомянутых модулирующих битов упомянутого канала управления. 6. The system according to claim 5, characterized in that said means for determining the channel estimate further comprises means for estimating the complex amplitude of the radiation in said received signal of the Earth-aircraft communication line based on said results of convolution of said modulating bits of said control channel. 7. Система по п. 6, отличающаяся тем, что средство для оценки комплексной амплитуды использует постоянное окно оценки. 7. The system of claim 6, wherein the means for estimating the complex amplitude uses a constant estimation window. 8. Система по п.6, отличающаяся тем, что средство для оценки комплексной амплитуды использует переменное окно оценки. 8. The system according to claim 6, characterized in that the means for estimating the complex amplitude uses a variable evaluation window. 9. Приемное устройство, содержащее антенну для приема сигнала, включающего в себя информацию, определяющую скорости передачи данных в канале данных; демодулятор канала управления, который демодулирует канал управления упомянутого сигнала линии связи Земля - летательный аппарат, включающего в себя упомянутую информацию, предназначенную для генерирования демодулированного сигнала канала управления и результатов свертки, устройство оценки канала, в котором используется упомянутый принятый сигнал линии связи Земля - летательный аппарат, результаты свертки и демодулированный сигнал канала управления для выработки оценок комплексных амплитуд излучения и задержек, и демодулятор канала данных, осуществляющий когерентную демодуляцию канала данных принятого сигнала, с использованием комплексных амплитуд излучений и задержки. 9. A receiver device comprising an antenna for receiving a signal including information defining data rates in a data channel; a control channel demodulator that demodulates the control channel of said Earth-to-aircraft communication signal signal, including said information for generating a demodulated control-channel signal and convolution results, a channel estimator using said received Earth-to-aircraft communication signal , convolution results and a demodulated control channel signal for generating estimates of complex radiation amplitudes and delays, and a channel demodulator a data channel carrying coherent demodulation of the received data signal using the complex amplitudes and delays radiation. 10. Система по п.9, отличающаяся тем, что устройство оценки канала дополнительно содержит схему оценки задержки, включающую в себя нестационарный согласованный фильтр, имеющий коэффициенты по меньшей мере частично определяемые двоичными разрядами обратной связи упомянутого демодулированного сигнала канала управления, который создает импульсную характеристику канала. 10. The system according to claim 9, characterized in that the channel estimator further comprises a delay estimation circuit including a non-stationary matched filter having coefficients at least partially determined by feedback bits of said demodulated control channel signal, which creates a channel impulse response . 11. Система по п.9, отличающаяся тем, что устройство оценки канала дополнительно содержит схему оценки задержки, включающую в себя набор корреляторов, формирующих импульсную характеристику канала. 11. The system according to claim 9, characterized in that the channel estimator further comprises a delay estimation circuit including a set of correlators forming a channel impulse response. 12. Система по п.9, отличающаяся тем, что устройство оценки канала дополнительно содержит схему оценки комплексной амплитуды, включающую в себя средство исключения модуляции результатов свертки, фильтр и преобразователь скорости, который компенсирует изменения скорости передачи между каналом управления и каналом данных. 12. The system according to claim 9, characterized in that the channel estimator further comprises a complex amplitude estimation circuit including means for excluding modulation of convolution results, a filter and a speed converter that compensates for changes in the transmission speed between the control channel and the data channel. 13. Система по п.11, отличающаяся тем, что фильтр имеет постоянный набор коэффициентов. 13. The system according to claim 11, characterized in that the filter has a constant set of coefficients. 14. Система по п.11, отличающаяся тем, что фильтр имеет переменный набор коэффициентов. 14. The system according to claim 11, characterized in that the filter has a variable set of coefficients. 15. Система по п.11, отличающаяся тем, что дополнительно содержит декодирующее устройство канала для декодирования демодулированного сигнала канала управления, и кодирующее устройство для повторного кодирования упомянутого декодированного сигнала с целью создания модулирующих двоичных разрядов упомянутого канала управления, причем модулирующие двоичные разряды обеспечиваются для упомянутой схемы оценки комплексной амплитуды с целью удаления модуляции из результатов свертки. 15. The system according to claim 11, characterized in that it further comprises a channel decoding device for decoding a demodulated control channel signal, and an encoding device for re-encoding said decoded signal to create modulating binary bits of said control channel, wherein modulating binary bits are provided for said complex amplitude estimation schemes to remove modulation from convolution results. 16. Система по п.9, отличающаяся тем, что дополнительно содержит буфер кадра для задержки распределения каждого кадра упомянутого принятого сигнала линии связи Земля - летательный аппарат на упомянутый блок демодулятора канала данных, пока имеются в наличии соответствующие оценки для этого кадра, поступающие с устройства оценки канала. 16. The system according to claim 9, characterized in that it further comprises a frame buffer for delaying the distribution of each frame of said received signal of the Earth - aircraft link to said block of the data channel demodulator, as long as there are corresponding estimates for this frame coming from the device channel ratings. 17. Способ когерентной демодуляции принятого сигнала многостанционного доступа с кодовым разделением каналов (МДКРК), согласно которому формируют канал управления, включающий в себя информацию, показывающую скорость передачи данных в канале данных упомянутого принятого сигнала МДКРК; производят демодуляцию упомянутого канала управления упомянутого принятого сигнала МДКРК, генерируют опорный сигнал, с использованием информации, полученной на этапе демодулирования; и производят когерентную демодуляцию упомянутого канала данных упомянутого принятого сигнала МДКРК, с использованием упомянутого опорного сигнала. 17. A method for coherent demodulation of a received code-division multiple access (CDMA) signal, according to which a control channel is formed including information showing a data rate in a data channel of said received CDMA signal; demodulating said control channel of said received CDMA signal; generating a reference signal using the information obtained in the demodulation step; and coherently demodulating said data channel of said received CDMA signal using said reference signal. 18. Способ по п.16, отличающийся тем, что дополнительно получают оценки канала, с использованием информации, вырабатываемой посредством демодуляции упомянутого канала управления, и генерируют упомянутый опорный сигнал с использованием полученной оценки канала. 18. The method according to clause 16, characterized in that it further obtains channel estimates using the information generated by demodulating said control channel, and generating said reference signal using the obtained channel estimate. 19. Способ по п.16, отличающийся тем, что на этапе генерирования опорного сигнала дополнительно производят оценку задержки излучения в упомянутом канале управления и оценку комплексной амплитуды упомянутых излучений в упомянутом канале управления. 19. The method according to clause 16, characterized in that at the stage of generating the reference signal, an additional evaluation of the radiation delay in said control channel and an estimation of the complex amplitude of said emissions in said control channel are performed. 20. Способ по п.18, отличающийся тем, что на этапе оценки комплексной амплитуды дополнительно используют переменный набор коэффициентов фильтра. 20. The method according to p. 18, characterized in that at the stage of evaluating the complex amplitude additionally use a variable set of filter coefficients. 21. Способ по п.18, отличающийся тем, что на этапе оценки комплексной амплитуды дополнительно используют постоянный набор коэффициентов фильтра. 21. The method according to p. 18, characterized in that at the stage of evaluating the complex amplitude additionally use a constant set of filter coefficients.
RU96122871/09A 1994-04-29 1995-04-25 Coherent receiver of code-division multiple- access system using sequence for direct demodulation of transmission line of earth- aircraft communication RU2152686C1 (en)

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US235,527 1994-04-29
US08/235,527 US5544156A (en) 1994-04-29 1994-04-29 Direct sequence CDMA coherent uplink detector
US235527 1994-04-29

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EP (1) EP0758504B1 (en)
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CN (1) CN1078987C (en)
AU (1) AU697493B2 (en)
BR (1) BR9507529A (en)
CA (1) CA2188869C (en)
DE (1) DE69524403T2 (en)
FI (1) FI964344A (en)
HK (1) HK1014300A1 (en)
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