WO2012039531A1 - 기준 신호 생성 장치 및 이를 이용한 프리앰블 시퀀스 검출 장치 - Google Patents
기준 신호 생성 장치 및 이를 이용한 프리앰블 시퀀스 검출 장치 Download PDFInfo
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- 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
- H04L27/2626—Arrangements specific to the transmitter only
- H04L27/2627—Modulators
- H04L27/2634—Inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators in combination with other circuits for modulation
- H04L27/2636—Inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators in combination with other circuits for modulation with FFT or DFT modulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] transmitter or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]
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- 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
- H04L27/261—Details of reference signals
- H04L27/2613—Structure of the reference signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/0005—Synchronisation arrangements synchronizing of arrival of multiple uplinks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/0055—Synchronisation arrangements determining timing error of reception due to propagation delay
- H04W56/0065—Synchronisation arrangements determining timing error of reception due to propagation delay using measurement of signal travel time
- H04W56/007—Open loop measurement
- H04W56/0075—Open loop measurement based on arrival time vs. expected arrival time
- H04W56/0085—Open loop measurement based on arrival time vs. expected arrival time detecting a given structure in the signal
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- 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
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2649—Demodulators
- H04L27/26524—Fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators in combination with other circuits for demodulation
- H04L27/26526—Fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators in combination with other circuits for demodulation with inverse FFT [IFFT] or inverse DFT [IDFT] demodulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] receiver or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]
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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
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
Definitions
- the present invention relates to a method for shortening a detection time of a PRACH signal synchronization and a preamble sequence of an LTE uplink system. More particularly, the present invention relates to a method for reducing a time for detecting a preamble sequence using an inverse discrete Fourier transform.
- the LTE system based on the Orthogonal Frequency Division Multiplexing (OFDM) scheme is currently being discussed in the 3rd Generation Partnership Project (3GPP) as a next generation mobile communication system to replace the Universal Mobile Telecommunication System (UMTS), which is the third generation mobile communication standard.
- the OFDM method transmits data by using multiple subcarriers in the frequency domain, and maintains orthogonality between subcarriers, thereby increasing frequency efficiency and providing selective frequency fading and multipath fading.
- Inter-symbol interference can be reduced by using a strong and protected interval (CP).
- CP strong and protected interval
- the structure of the equalizer is simple in hardware, it has a strong advantage against impulse noise, and thus an optimum transmission efficiency can be obtained in high-speed data transmission.
- 3GPP LTE uplink performs a Discrete Fourier Transform (DFT) before subcarrier mapping to solve a Peak to Average Power Ratio (PAPR) problem of OFDM technology.
- DFT Discrete Fourier Transform
- PAPR Peak to Average Power Ratio
- SC-FDMA SC-FDMA in LTE.
- Zadoff-Chu CAZAC hereinafter referred to as 'Constant Amplitude Zero Auto'
- CAZAC is a code used to generate a reference signal (RS).
- the LTE uplink channel includes a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), a physical random access channel (PRACH), and a sounding reference (SRS). Signal) Channel is used.
- the PRACH is an LTE uplink channel transmitted by the terminal for initial synchronization.
- the PUCCH is an LTE uplink control channel and includes CQI information and ACK / NACK.
- PUSCH is an LTE uplink data channel.
- SRS is one of RS (Reference Signal) of the LTE uplink by periodically transmitting the terminal, thereby maintaining the synchronization of the terminal to the initial synchronization of the uplink using the PRACH.
- the channel quality of the uplink is notified and used as input information of the base station uplink scheduler.
- the random access procedure is used for the terminal to synchronize time with the network or to acquire radio resources for transmitting uplink data.
- a terminal transmits one preamble through a physical random access channel (PRACH), which is an uplink physical channel.
- PRACH physical random access channel
- the preamble selects and transmits one of the 64 preambles.
- the base station When the base station receives the preamble transmitted by the terminal, the base station transmits a random access response on the downlink physical channel when the base station receives the preamble transmitted by the terminal.
- the base station transmits an acknowledgment (ACK) or a negative response (Not-Acknowledgment (NACK)) to the terminal through the random access response.
- ACK acknowledgment
- NACK Neg-Acknowledgment
- the UE After the UE receives 64 usable preambles (ie, sequences) from the base station, the UE uses one sequence selected from the allocated sequences for the random access procedure.
- the base station has information about all possible sequences and must calculate the correlations for all sequences simultaneously.
- the maximum number of preambles allocated to the terminal is 64. In this case, since the base station must detect one sequence selected and transmitted by the terminal, 64 correlators must be simultaneously implemented.
- An object of the present invention is to propose a method in which a base station uses a small amount of hardware resources with a simple method and detects a preamble sequence used by a terminal among a plurality of preamp sequences.
- An object of the present invention is to propose a method for reducing the time required for a base station to detect a preamble sequence used in a terminal among a plurality of preamp sequences.
- the problem to be solved by the present invention is to obtain the synchronization between the terminal and the base station by calculating the starting point of the sequence of the CP and the sequence constituting the PRACH, using this to reduce the time required to detect the preamble sequence used by the terminal It is to suggest a way to make.
- the reference signal generation apparatus of the present invention receives a first signal having a predetermined value and outputs a plurality of second signals having a length of 839, and a discrete Fourier signal from the second signal received from the preamble sequence generator.
- the preamble sequence detection apparatus of the present invention receives a first signal having a predetermined value and outputs a plurality of second signals having a length of 839, and a discrete Fourier signal from the second signal received from the preamble sequence generator.
- a discrete Fourier transform unit for converting a frequency domain signal into a frequency domain signal, a subcarrier mapping unit for subcarrier mapping the frequency domain signal output from the discrete Fourier transform unit, and a signal having a length of 2 n (n: natural number) from the subcarrier mapping unit
- a reference signal generator including an inverse discrete Fourier transform and an inverse discrete Fourier transform to convert to a time domain signal having a length of 2 n (n: natural number);
- a PRACH for receiving a physical random access channel (PRACH) signal transmitted from a terminal
- PRACH physical random access channel
- the apparatus for detecting a preamble sequence calculates a point at which a sequence starts from a CP and a sequence configuring a PRACH, thereby obtaining synchronization between a terminal and a base station, and using the base station to detect a preamble sequence used by the terminal. Shorten the time required.
- 1 is a view showing a method of performing a random access process in an LTE system
- FIG. 2 illustrates a structure of a PRACH transmitted from a terminal to a base station according to an embodiment of the present invention.
- FIG. 3 is a block diagram illustrating a process of generating a reference signal using 64 preamble sequences in a base station according to an embodiment of the present invention.
- FIG. 4 is a block diagram illustrating a configuration of detecting a preamble sequence transmitted by a terminal through a PRACH in a base station according to an embodiment of the present invention.
- FIG. 5 is another block diagram illustrating a configuration of detecting a preamble sequence transmitted by a terminal through a PRACH in a base station according to an embodiment of the present invention.
- FIG. 6 is a diagram illustrating an operation performed by a divider according to an exemplary embodiment of the present invention.
- preamble sequence generator 302 839-DFT unit
- Subcarrier Mapping Unit 306 2048-IDFT Unit
- the structure of the PRACH consists of a CP and a sequence.
- Table 1 below shows random access preamble parameters of the PRACH.
- the base station determines to use one preamble format among the preamble formats according to the channel environment or the cell radius, and broadcasts information on the preamble format to the terminal located in the cell.
- the terminal receives the broadcasted preamble format and configures the PRACH using the received information.
- the LTE system transmits and receives data by inserting a guard interval in which a cyclic prefix (CP) is input to a transmission signal in a symbol unit as a method for reducing the influence of multipath (ghost). That is, by increasing the symbol period of the transmitted signal, by inserting the guard interval inputted by the CP to transmit data, it is possible to reduce the inter-symbol interference that may be caused by the delay of the received symbols through the multipath, It can be maintained to reduce the interference between channels.
- CP cyclic prefix
- the terminal selects one preamble sequence among the available preamble sequences and transmits it to the PRACH.
- the terminal may select one preamble sequence among the 64 available preamble sequences and transmit the selected preamble sequence to the PRACH.
- the PRACH may know that the same signal as the CP is located at the end of the sequence.
- the present invention proposes a method of acquiring synchronization using a signal transmitted on a PRACH.
- the present invention obtains synchronization by using the signal received by the PRACH using Equation 1 below.
- the present invention calculates a correlation between a signal received from a terminal and a signal shifted at a predetermined interval.
- the correlation information having the largest value among the calculated correlation values is used to obtain time information that the terminal transmits a signal to the PRACH. That is, the base station should acquire synchronization with the terminal in order to perform smooth communication.
- the synchronization acquisition is obtained by calculating a correlation between the signal received from the terminal and the signal moving the received signal at regular intervals as described above. do.
- FIG. 3 is a block diagram illustrating a process of generating a reference signal using 64 preamble sequences in a base station according to an embodiment of the present invention.
- a process of generating a reference signal using 64 preamble sequences according to an embodiment of the present invention will be described in detail with reference to FIG. 3.
- a block for generating a reference signal includes a preamble sequence generator 300, a discrete Fourier transform (DFT) unit 302, a subcarrier mapping unit 304, and an inverse discrete Fourier transform (Inverse Discrete Fourier). Transform (IDFT) unit 306 is included.
- DFT discrete Fourier transform
- subcarrier mapping unit 304 subcarrier mapping unit 304
- IDFT inverse discrete Fourier transform
- Transform (IDFT) unit 306 is included.
- Orthogonal sequences may be used for transmission of control information.
- An orthogonal sequence refers to a sequence having excellent correlation characteristics.
- An example of an orthogonal sequence is a constant amplitude zero auto-correlation (CAZAC) sequence.
- the k-th element c (k) of the primitive ZC sequence having a root index M may be expressed as follows.
- index M is a natural number less than or equal to N, and M and N are relatively prime. If N is a prime number, the number of root indexes of the ZC sequence is N-1.
- Equation 3 means that the size of the ZC sequence is always 1
- Equation 4 means that auto correlation of the ZC sequence is represented by a Dirac-delta function.
- the autocorrelation here is based on circular correlation.
- Equation 5 means that cross correlation is always constant.
- the terminal needs to know the raw index or group of raw indexes available in the cell.
- the base station must broadcast a usable raw index or a group of raw indexes to the terminal.
- the raw indexes are less than N by the number of relative primes. If N is prime, the number of raw indexes is N-1. In this case, the base station informs the terminal of any one of the N-1 raw indexes.
- Each cell may use a different number of raw indices depending on the cell radius.
- Larger cell radius can reduce the number of ZC sequences that can maintain orthogonality through cyclic shifts due to propagation delay or round trip delay and / or delay spread. have. That is, as the cell radius increases, the number of cyclic shifts available in the corresponding raw index may be reduced even if the length of the ZC sequence is constant.
- sequences generated by cyclic shifts in a raw index are also called zero correlation zone (ZCZ) sequences because they are orthogonal to each other. Since the minimum number of ZC sequences allocated to the UE for each cell must be guaranteed, when the cell radius increases, the minimum number of ZC sequences can be secured by increasing the number of raw indexes used in the cell.
- the preamble sequence generator 300 shifts the ZC sequence generated using the CAZAC code to generate 64 preamble sequences.
- the DFT unit 302 performs Discrete Fourier Transform on the 64 preamble sequences generated by the preamble sequence generator 300.
- the DTF unit 302 performs an 839-DTF to convert to the frequency domain. That is, when an input signal having a length of 839 which is a prime number is input, the 839-DFT is performed, and a signal having a length of 839 which is a prime number is output.
- the subcarrier mapping unit 304 maps the preamble sequence converted into the frequency domain to a desired frequency band.
- the IDFT unit 306 performs inverse discrete Fourier transform to convert the preamble sequence signal mapped to the frequency band into the time domain.
- the IDFT unit performs 2 n (n; natural numbers) -IDFTs. For example, when an input signal having a length of 2048 is input, the IDFT unit performs a 2048-IDFT and outputs a signal having a length of 2048.
- FIG. 4 is a block diagram illustrating a configuration of detecting a preamble sequence transmitted by a terminal through a PRACH in a base station according to an embodiment of the present invention.
- a process of detecting a preamble sequence transmitted from the terminal to the PRACH by the base station will be described in detail with reference to FIG. 4.
- the detection block diagram includes a PRACH receiver 400, a delay adjuster 402, a first correlation unit 404, a first determiner 406, a downsampling unit 408, and a reference signal generator 410. ), A second correlation unit 412, a second determination unit 414, a preamble sequence, and a time offset detection unit 416.
- the PRACH receiver 400 receives a signal transmitted from the terminal to the PRACH. As described above, the UE selects one preamble sequence among the available preamble sequences, performs DFT, subcarrier mapping, and inverse DTF, and then adds a CP for guard interval insertion to help improve the performance of the PRACH receiver in the time domain. Transmit to base station.
- the PRACH receiver 400 transmits the signal received by the PRACH to the delay unit.
- the delay adjuster 402 delays the signal having a plurality of signals having an integer multiple of the unit length from the signal received from the PRACH receiver 400 by a predetermined length unit of the received signal. That is, the R (i) signal and R (m + i) described in Equation 1 are generated.
- the generated signal is transmitted to the first correlation part 404.
- the first correlation unit 404 measures the correlation between the R (i) signal and R (m + i) transmitted according to the equation described in Equation 1, and measures the result of the first determination unit 406. To pass.
- the first determination unit 406 determines the signal having the largest correlation according to the received correlation, and obtains the time information that the terminal transmits the signal to the PRACH based on the determined correlation.
- the down sampling unit 408 performs down sampling on the signal having a length of 24576 to have a length of 2 n (n; natural number), and then transfers the signal to the second correlation unit 412.
- the down sampling unit may perform down sampling on a signal having a length of 24576 to have a length of 2 n (n: natural number), and then transfer the signal to the second correlation unit 412.
- the reference signal generator 410 generates 64 reference signals which have been subjected to DFT, subcarrier mapping, and inverse DTF with respect to the 64 preamble sequences generated as described with reference to FIG. 3.
- the reference signal generator 410 transmits the generated reference signal to the second correlation unit 412.
- the second correlation unit 412 detects a correlation between the signal received from the down sampling unit 408 and the reference signal received from the reference signal generator 410.
- Equation 6 is a formula for detecting the correlation between the signal received from the down sampling unit 408 and the reference signal received from the reference signal generator 412.
- the second correlation unit 412 transfers the correlation r F detected using Equation 6 to the second determination unit 414.
- the second determination unit 414 detects the correlation having the largest value by using the correlation received from the correlation unit and transfers the information about the correlation to the preamble sequence and the time offset detection unit 416.
- the preamble sequence and time offset detection unit 416 may determine the preamble sequence used by the terminal by checking the corresponding reference signal based on the received correlation. That is, the correlation between the reference signal using the same preamble sequence as the preamble sequence used for the signal received by the PRACH receiver 400 and the signal received by the PRACH receiver 400 has the largest value.
- the base station can detect a time offset associated with the preamble sequence used by the terminal and the time information transmitted by the PRACH.
- the present invention has an advantage that the detection time can be shortened by detecting the preamble sequence using 2 n (n: natural number) -IDFT instead of detecting the preamble sequence using the existing 24576-IDFT.
- FIG. 5 is another block diagram illustrating a configuration of detecting a preamble sequence transmitted by a terminal through a PRACH in a base station according to an embodiment of the present invention.
- a process of detecting a preamble sequence transmitted from the terminal to the PRACH by the base station will be described in detail with reference to FIG. 5.
- a splitter 500 and a signal length adjuster 502 are added to the detection block diagram in comparison with FIG. 4.
- the division unit and the signal length adjusting unit 502 will be described with reference to FIG. 5.
- the divider 500 receives a plurality of reference signals generated by the reference signal generator. As illustrated in FIG. 6, the divider 500 generates a new reference signal by combining a signal located in an odd register of the first reference signal and an even register of the second reference signal among the input reference signals. . That is, the divider 500 generates one new reference signal by combining two reference signals among the received reference signals. As described above, the dividing unit 500 generates the first generation reference signal by combining the first reference signal and the second reference signal, and generates the second generation reference signal by combining the third reference signal and the fourth reference signal. do. Of course, the divider 500 may generate one new reference signal by combining at least two reference signals among the received reference signals. For example, the divider 500 may generate one new reference signal by combining three reference signals among the received reference signals. The dividing unit 500 transmits the generated generation reference signal to the signal length adjusting unit 502.
- the signal length adjustment part 502 adjusts the signal length to something less than 2 n to further reduce operation and length value of the 2 n.
- the signal length adjusting unit 502 transmits the adjusted signal to the second correlator 412.
- the down-sampled signal from the down sampling unit 408 is also transmitted to the signal length adjusting unit 504, and the signal length adjusting unit 504 also signals with a value less than 2 n to further reduce arithmetic at a value of 2 n lengths. Adjust the length.
- the second correlation unit 412 detects a correlation between the signal received from the down sampling unit 408 and the reference signal received from the division unit 500.
- Equation 7 is a formula for detecting a correlation between the signal received from the downsampling unit 408 and the reference signal received from the divider 412 by the second correlation unit 412.
- the second correlation unit 412 transmits the correlation r F detected using Equation 7 to the determination unit. Subsequently, operations of the second determiner, the preamble sequence, and the time offset detector are the same as in FIG. 4.
Abstract
Description
Claims (11)
- 소정값을 갖는 제1신호를 입력받아 839 길이를 갖는 복수 개의 제 2신호를 출력하는 프리앰블 시퀀스 생성부;상기 프리앰블 시퀀스 생성부로부터 전달받은 제2신호를 이산 푸리에 변환하여 주파수 영역 신호로 변환하는 이산 푸리에 변환부;상기 이산 푸리에 변환부에서 출력된 주파수 영역 신호를 부반송파 매핑하는 부반송파 매핑부;상기 부반송파 매핑부로부터 2n(n:자연수) 길이를 갖는 신호를 입력받아 역 이산 푸리에 변환하여 2n(n:자연수) 길이를 갖는 시간 영역 신호로 변환하는 역 이산 푸리에 변환부를 포함하는 기준 신호 생성 장치.
- 제 1항에 있어서, 상기 n은 11임을 특징으로 하는 기준신호 생성 장치.
- 제 1항에 있어서, 상기 프리앰블 시퀀스 생성부는,상기 839 길이를 갖는 64개의 프리앰블 시퀀스 신호를 생성함을 특징으로 하는 기준 신호 생성 장치.
- 제 3항에 있어서, 상기 프리앰블 시퀀스 생성부는,자기상관 또는 상호 상관 특성이 우수한 카작(CAZAC) 코드를 이용함을 특징으로 하는 기준 신호 생성 장치.
- 소정값을 갖는 제1신호를 입력받아 839 길이를 갖는 복수 개의 제 2신호를 출력하는 프리앰블 시퀀스 생성부와 상기 프리앰블 시퀀스 생성부로부터 전달받은 제2신호를 이산 푸리에 변환하여 주파수 영역 신호로 변환하는 이산 푸리에 변환부와 상기 이산 푸리에 변환부에서 출력된 주파수 영역 신호를 부반송파 매핑하는 부반송파 매핑부와 상기 부반송파 매핑부로부터 2n(n:자연수)길이를 갖는 신호를 입력받아 역 이산 푸리에 변환하여 2n(n:자연수)길이를 갖는 시간 영역 신호로 변환하는 역 이산 푸리에 변환부를 포함하는 기준신호 생성부;단말로부터 전송된 물리 랜덤 접속 채널(PRACH) 신호를 수신하는 PRACH 수신부;상기 기준신호 생성부로부터 수신한 기준신호와 상기 PRACH 수신부로부터 수신한 신호의 상관도를 검출하는 제2상관부를 포함함을 특징으로 하는 프리앰블 시퀀스 검출 장치.
- 제 5항에 있어서, 상기 제2상관부로부터 전달받은 상관도 중 최대값을 갖는 상관도를 결정하는 제2결정부를 포함함을 특징으로 하는 프리앰블 시퀀스 검출 장치.
- 제 6항에 있어서, 상기 결정부로부터 전달받은 상관도를 이용하여 상기 PRACH 수신부로부터 수신한 신호에 포함된 프리앰블 시퀀스를 검출하는 프리앰블 시퀀스 및 타임오프셋 검출부를 포함함을 특징으로 하는 프리앰블 시퀀스 검출 장치.
- 제 5항에 있어서,상기 PRACH 수신부로부터 수신한 신호를 단위 길이의 정수배를 갖는 복수 개의 신호를 생성하기 위해 일정한 길이 시간 단위로 수신된 상기 신호를 지연시키는 지연 조절부;상기 지연 조절부로부터 전달받은 두 개의 신호의 상관도를 측정하는 제1상관부;상기 제1상관부로부터 전달받은 상관도 중 가장 큰 값을 갖는 상관도를 결정하는 제1결정부;상기 PRACH 수신부로부터 수신한 24576의 길이를 갖는 신호를 2n(n:자연수)의 길이를 갖도록 다운 샘플링을 수행한 후 제2상관부로 전달하는 다운 샘플링부를 포함함을 특징으로 하는 프리앰블 시퀀스 검출 장치.
- 제 5항에 있어서, 상기 기준신호 생성부로부터 입력된 적어도 두 개의 기준신호들을 조합하여 하나의 생성 기준신호를 생성하는 분할부를 포함함을 특징으로 하는 프리앰블 시퀀스 검출 장치.
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EP11826959.6A EP2621110A4 (en) | 2010-09-20 | 2011-02-22 | REFERENCE SIGNAL GENERATING DEVICE AND PREAMBLE SEQUENCE DETECTION DEVICE THEREFOR |
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KR101456700B1 (ko) * | 2012-09-10 | 2014-10-31 | 주식회사 케이티 | 상향링크 채널 추정 방법 및 통신 시스템 |
CN106464627B (zh) * | 2014-06-11 | 2020-03-31 | 瑞典爱立信有限公司 | 处理前导码序列的方法、无线设备、前导码接收机、网络节点和计算机可读存储介质 |
MX2018008687A (es) * | 2014-08-25 | 2022-04-25 | One Media Llc | Configuracion dinamica de preambulo de cuadro de datos de transporte de capa fisica (phy) de multiplexion de division de frecuencia ortoganal flexible. |
CA2976144C (en) | 2015-03-09 | 2022-03-29 | ONE Media, LLC | System discovery and signaling |
GB2538316B (en) * | 2015-05-15 | 2021-01-06 | Viavi Solutions Uk Ltd | PRACH signal generation |
ES2773904T3 (es) | 2015-07-15 | 2020-07-15 | Tata Consultancy Services Ltd | Detección de preámbulos de canal físico de acceso aleatorio en un sistema de comunicación de la evolución a largo plazo |
WO2017022961A1 (ko) * | 2015-07-31 | 2017-02-09 | 엘지전자 주식회사 | Fdr 방식을 이용하는 통신 장치가 비선형 자기간섭 신호의 채널 추정을 위한 참조신호를 전송하는 방법 |
EP3522622B1 (en) * | 2016-11-11 | 2023-04-26 | Samsung Electronics Co., Ltd. | Method for determining correction time in wireless communication system and apparatus therefor |
CN108631903B (zh) * | 2017-03-22 | 2019-09-17 | 电信科学技术研究院 | 一种物理随机接入信道前导码序列确定方法及装置 |
KR102308983B1 (ko) | 2019-08-28 | 2021-10-05 | 중앙대학교 산학협력단 | 진동 펄스 시퀀스 생성, 검출 방법 및 그 장치 |
KR102262474B1 (ko) * | 2019-12-11 | 2021-06-08 | 에티포스 시오 | Lte v2x 통신에 있어서 pscch dmrs 검출 장치 및 그 검출 방법 |
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US20130208679A1 (en) | 2013-08-15 |
JP2013541898A (ja) | 2013-11-14 |
JP5553255B2 (ja) | 2014-07-16 |
KR101080906B1 (ko) | 2011-11-08 |
EP2621110A1 (en) | 2013-07-31 |
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