WO2004045177A1 - 無線通信装置及び無線通信方法 - Google Patents
無線通信装置及び無線通信方法 Download PDFInfo
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- WO2004045177A1 WO2004045177A1 PCT/JP2003/014331 JP0314331W WO2004045177A1 WO 2004045177 A1 WO2004045177 A1 WO 2004045177A1 JP 0314331 W JP0314331 W JP 0314331W WO 2004045177 A1 WO2004045177 A1 WO 2004045177A1
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- information signal
- signal
- known reference
- reference signal
- wireless communication
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/76—Pilot transmitters or receivers for control of transmission or for equalising
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- 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
- H04L25/021—Estimation of channel covariance
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- 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
-
- 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
- H04L25/0226—Channel estimation using sounding signals sounding signals per se
Definitions
- the present invention relates to a wireless communication apparatus and a wireless communication method using a communication method in which a known reference signal (pilot symbol) is inserted into transmission data and amplitude / phase fluctuation compensation is performed based on the known reference signal.
- a known reference signal pilot symbol
- a known reference signal also called a pilot symbol or a pilot signal
- a complex baseband is received on the receiving side.
- a method is employed in which amplitude and phase fluctuation compensation is performed based on a pilot symbol received from the transmitting side.
- pilot symbols are periodically inserted into the data symbol sequence during transmission, or a known symbol is inserted at the beginning of the data symbol sequence to be transmitted, in order to estimate and compensate for amplitude and phase fluctuations due to fading.
- pilot symbols are inserted.
- a method is used that estimates and compensates for amplitude and phase fluctuations of the received signal due to fusing using pilot symbols inserted periodically or at the beginning.
- the pilot symbol insertion interval of these existing mobile communication systems is fixedly set to the maximum value of the fading time fluctuation speed targeted by each system. That is, in each system, a receiving station with the fastest time variation of fading is set, and the insertion interval of the pilot symbol is fixedly determined so that the set receiving station can also communicate.
- Patent Document 1 detects a Doppler frequency using a known reference signal, and estimates the reception quality of an information signal in a fading environment by estimating the detected Doppler frequency and the reception quality of the known reference signal. A technique has been disclosed that enables a modulation scheme suitable for this reception quality to be adopted.
- Patent Document 2 discloses that the pilot signal arrangement pattern is switched depending on the length of the guard interval of the OFDM signal to be transmitted, and when the guard interval is short, the number of inserted pilot signals is reduced. There is disclosed a technology that can adopt a pilot signal arrangement pattern that increases the number of inserted pilot signals when the guard interval is long and the guard interval is long.
- Patent Document 3 discloses a concept of improving transmission efficiency by adaptively changing the insertion interval and the number of inserted pilot symbols according to the conditions of a transmission path.
- Patent Document 1 Japanese Patent Application Laid-open No. 2000-4-2411
- Patent Document 2 Japanese Patent Application Laid-Open No. 11-2845997 (paragraphs 0 0
- Patent Literature 3 Japanese Patent Application Laid-Open No. 200-33 9 3 63 (Paragraph 0 19,
- Non-Patent Document 1 Written by Shuichi Sasaoka, "Mobile Communication", Chapter 5, Ohmsha Publishing, May 25, 2010, First Edition, First Edition Issued
- the pilot symbol insertion interval is fixedly determined.
- the pilot symbol insertion interval is always constant irrespective of the transmission path environment between the transmitting side and the receiving side.
- the receiving station that is moving at high speed is also stationary.
- the receiving station that performs this operation also receives pilot symbols at the same pilot symbol insertion interval.
- the pilot symbols themselves are not included in the user data, as the number of inserted pilot symbols increases, the data transmission efficiency decreases.
- pilot symbol insertion interval is set in accordance with the environment of the maximum speed of the fading time fluctuation, for example, a pilot symbol ⁇ such as a stationary receiving station or a slowly moving receiving station is used. Pilot symbols are inserted and transmitted at a period that matches the maximum fluctuating rate, even for a receiving station that can increase the input interval (that is, a receiving station that can receive pilot symbols for a longer period). I will. Therefore, the conventional system has a problem that the data transmission efficiency to a stationary receiving station or a slowly moving receiving station is low.
- Patent Literature 2 and Patent Literature 3 disclose techniques for making the insertion interval of pilot signals variable. Since there is no clear description as to whether or not to detect the situation of (1), even if these Patent Documents 2 and Patent Document 3 are referred to, it is difficult to accurately detect the state of the transmission path, and the feasibility of the invention Is extremely scarce. Disclosure of the invention
- the present invention has been made in view of the above problems, and has as its object to provide a wireless communication device and a wireless communication method that improve the throughput of communication between each transmitting and receiving station according to the fading fluctuation speed between the transmitting and receiving stations.
- a wireless communication device of the present invention is a wireless communication device capable of performing wireless communication with a communication terminal device of the other party, and receives a signal transmitted from the wireless communication device of the other party. Using the signal received by the receiving means, a transmission path time variation detecting means for detecting the time variation of the transmission path response, and using the detected time variation of the transmission path response. And a known reference signal insertion interval determining means for determining an insertion interval of the known reference signal.
- a known reference signal insertion for inserting a known reference signal into an information signal to be transmitted based on the insertion interval of the known reference signal determined by the known reference signal insertion interval determining means Means for transmitting the information signal in which the known reference signal is inserted, to the partner wireless communication apparatus.
- the pilot signal is inserted at the optimal insertion interval of the pilot signal in the transmission path. Transmission, eliminating redundant pilot signals and improving communication throughput. Can be raised.
- an information signal dividing means for dividing an information signal to be transmitted based on the insertion interval of the known reference signal determined by the known reference signal insertion interval determining means,
- a known reference signal inserting means for inserting a known reference signal into the divided information signal divided by the dividing means, and a transmitting means for transmitting the information signal with the known reference signal inserted to a partner wireless communication apparatus
- the insertion interval of the known reference signal determined from the detection result of the time variation of the channel response
- an information signal dividing means for dividing an information signal to be transmitted, and an information signal processing means for processing the divided information signal divided by the information signal dividing means.
- Information signal combining means for combining the divided information signals processed by the information signal processing means, and information signal processing based on the insertion interval of the known reference signal determined by the reference signal insertion interval determination means.
- Known signal insertion means for inserting a known reference signal into the information signal combined by the means, and transmission means for transmitting the information signal with the known reference signal inserted thereto to the partner wireless communication apparatus. I have.
- transmission is performed by inputting a pilot signal at the optimum transmission interval of the pilot signal in the transmission path. It is possible to improve the throughput of communication by eliminating redundant gateway signals, and to eliminate the non-signal section between packets generated when transmitting as divided packets. It is possible to reduce and further improve the communication throughput.
- the information signal dividing means further includes a division length determining means for determining a division length of the information signal in the information signal dividing means, and the division length determining means uses a time variation of a transmission path response to It is configured to determine the division length of the information signal.
- the division length at the time of the MAC division performed in the MAC layer can be made to depend on the time variation of the channel response.
- a first information signal dividing means for dividing an information signal to be transmitted, and information for processing the divided information signal divided by the first information signal dividing means Signal processing means; information signal combining means for combining the divided information signals processed by the information signal processing means; and a known reference signal insertion interval determined by the known reference signal insertion interval determination means.
- a signal obtained by recombining the information signals divided by the MAC layer can be set to a desired signal based on the insertion interval of the known reference signal determined from the detection result of the time variation of the channel response.
- the insertion of the pilot signal is optimized at the transmission interval of the pilot signal. Transmission, which eliminates redundant pilot signals and reduces communication throughput. Can be improved.
- a division length determining means for determining a division length of the information signal in the first information signal dividing means, wherein the division length determining means is capable of controlling a time variation of a transmission path response. It is configured to determine the division length of the information signal using the quantity.
- the division length at the time of the MAC division performed in the MAC layer can be made to depend on the time variation of the channel response.
- a transmission for transmitting the insertion interval of the known reference signal to notify the other-side wireless communication device of the insertion interval of the known reference signal determined by the reference signal insertion interval determining means Means.
- the transmission path time variation detecting means detects a time variation of the transmission path response using a signal known to both the transmission side and the reception side. It is configured.
- the transmission path time change detecting means uses a signal that is not known to at least one of the transmission side and the reception side, and the time change amount of the transmission path response is used. Is configured to be detected.
- the wireless communication method of the present invention provides a method for communicating with a communication partner.
- a wireless communication method in a wireless communication device capable of performing wireless communication with a communication terminal device comprising: a receiving step of receiving a signal transmitted from a partner wireless communication device; and using the signal received in the receiving step.
- a known reference signal for inserting a known reference signal into an information signal to be transmitted based on a known reference signal insertion interval determined in the known reference signal insertion interval determining step. It has a signal input step and a transmission step of transmitting the information signal into which the known reference signal has been inserted to the partner wireless communication apparatus.
- the pilot signal is inserted at the optimal pilot signal insertion interval on the channel. It is possible to perform transmission by performing the above, and it is possible to improve the communication throughput by eliminating redundant pilot signals.
- the insertion interval of the known reference signal determined from the detection result of the time variation of the channel response . It is possible to perform transmission by inserting a pilot signal at the optimal insertion interval of the pilot signal in the transmission path in the physical layer, eliminating redundant pilot signals. As a result, communication throughput can be improved.
- an information signal dividing step for dividing an information signal to be transmitted an information signal processing step for processing the information signal after the division in the information signal dividing step, and an information signal
- the method includes a known reference signal insertion step of inserting a known reference signal into an information signal, and a transmission step of transmitting the information signal with the known reference signal inserted to a partner wireless communication device.
- a signal obtained by recombining the information signals divided by the MAC layer with respect to the signal based on the insertion interval of the known reference signal determined from the detection result of the time variation of the channel response is used. It is possible to perform transmission by inserting a pilot signal at the input interval of the pilot signal that is optimal in the transmission path in the layer, and eliminates the redundant pilot signal to reduce the communication throughput. In addition to improving the communication throughput, it is possible to reduce the non-signal section between packets generated when transmitting as a divided bucket, and to improve the communication throughput.
- the present invention in addition to the above invention, has a split length determining step of determining the split length of the information signal in the information signal splitting step using the time variation of the transmission path response.
- the division length at the time of the MAC division performed in the MAC layer can also be made to depend on the time variation of the transmission path response.
- an information signal to be transmitted is divided.
- the information signal processing step for processing the divided information signal divided in the first information signal dividing step, and the divided information signal processed in the information signal processing step A second information signal dividing step of dividing the information signal combined in the information signal combining step based on the insertion interval of the known reference signal determined in the known reference signal insertion interval determining step;
- a signal in which the information signals divided by the MAC layer are recombined can be converted into a desired signal based on the insertion interval of the known reference signal determined from the detection result of the time variation of the channel response.
- the pilot signal is inserted at the optimal pilot signal insertion interval in the transmission path. Transmission can be performed, and communication throughput can be improved by eliminating redundant pilot signals.
- the present invention has a division length determining step of determining a division length of an information signal in a first information signal division step using a time variation of a transmission path response.
- the division length at the time of the MAC division performed in the MAC layer can also be made to depend on the time variation of the transmission path response.
- the notification interval of the known reference signal determined in the reference signal insertion interval determination step is notified to the partner wireless communication apparatus.
- a signal known to both the transmitting side and the receiving side is used to obtain the time fluctuation amount of the transmission path response. Is detected.
- the time fluctuation amount of the transmission path response is determined by using a signal that is unknown to at least one of the transmission side and the reception side. To detect.
- FIG. 1 is a block diagram showing an example of the internal configuration of the wireless communication device according to the first embodiment of the present invention
- FIG. 2 is a block diagram showing an example of the internal configuration of the wireless communication device according to the second embodiment of the present invention
- FIG. 3A is a schematic diagram illustrating a structure of transmission data (data supplied to the MAC division unit 11) supplied from an upper layer in the wireless communication device according to the second embodiment of the present invention
- FIG. 3B is a schematic diagram showing the structure of data after processing in the MAC division unit 11 in the wireless communication device according to the second embodiment of the present invention.
- FIG.3C is a schematic diagram showing the structure of data after processing in the P HY transmission unit 12 in the wireless communication device according to the second embodiment of the present invention.
- FIG. 4 is an example of an internal configuration of the wireless communication device according to the third embodiment of the present invention. Showing block diagram,
- FIG. 5A is a schematic diagram illustrating a structure of transmission data (data supplied to the MAC division unit 11) supplied from an upper layer in the wireless communication device according to the third embodiment of the present invention
- FIG.5B is a schematic diagram showing a data structure after processing in the MAC division unit 11 in the wireless communication device according to the third embodiment of the present invention.
- FIG. 5C is a schematic diagram showing the structure of data after processing in the data combining unit 13 in the wireless communication device according to the third embodiment of the present invention.
- FIG.5D is a schematic diagram showing the structure of data after processing in the P HY transmission unit 12 in the wireless communication device according to the third embodiment of the present invention.
- FIG. 6 is a block diagram illustrating an example of an internal configuration of a wireless communication device according to a fourth embodiment of the present invention.
- FIG. 7A is a schematic diagram illustrating a structure of transmission data (data supplied to a division unit 11) supplied from an upper layer in a wireless communication device according to a fourth embodiment of the present invention.
- FIG. 7B is a schematic diagram showing a structure of data after processing in the MAC division unit 11 in the wireless communication device ⁇ according to the fourth embodiment of the present invention.
- FIG. 7C is a schematic diagram showing the structure of data after processing in the data combining unit 13 in the wireless communication device according to the fourth embodiment of the present invention.
- FIG.7D is a schematic diagram showing the structure of data after processing in the PHY transmission unit 12 in the wireless communication device according to the fourth embodiment of the present invention.
- FIG. 8 is a block diagram illustrating an example of an internal configuration of a wireless communication device according to a fifth embodiment of the present invention.
- FIG. 9A is a schematic diagram illustrating a structure of transmission data (data supplied to the MAC division unit 11) supplied from an upper layer in the wireless communication device according to the fifth embodiment of the present invention.
- FIG. 9B is a schematic diagram showing the structure of data after processing in the MAC division unit 11 in the wireless communication device according to the fifth embodiment of the present invention.
- FIG. 9C is a schematic diagram showing the structure of data after processing in the data combining unit 13 in the wireless communication device according to the fifth embodiment of the present invention.
- FIG.9D is a schematic diagram showing the structure of data after processing by the data division unit 14 in the wireless communication device according to the fifth embodiment of the present invention.
- FIG.9E is a schematic diagram showing the structure of data after processing in the PHY transmission unit 12 in the wireless communication device according to the fifth embodiment of the present invention.
- FIG. 10 is a block diagram illustrating an example of an internal configuration of a wireless communication device according to a sixth embodiment of the present invention.
- FIG. 11A is a schematic diagram illustrating a structure of transmission data (data supplied to the MAC division unit 11) supplied from an upper layer in the wireless communication device according to the sixth embodiment of the present invention.
- FIG. 11B is a schematic diagram showing the structure of data after processing in the M5A / C division unit 11 in the wireless communication device according to the sixth embodiment of the present invention.
- FIG. 11C is a schematic diagram showing the structure of data after processing in the data combining unit 13 in the wireless communication device according to the sixth embodiment of the present invention.
- FIG. 11D is a schematic diagram showing the structure of data after processing in the data division unit 14 in the wireless communication device according to the sixth embodiment of the present invention.
- FIG. 11E is a schematic diagram showing a structure of data after processing in the P HY transmission unit 12 in the wireless communication device according to the sixth embodiment of the present invention.
- FIG. 12 is a block diagram illustrating an example of an internal configuration of a wireless communication device according to a seventh embodiment of the present invention.
- FIG. 13 is a schematic diagram showing an example of a change in path when the receiving station according to the present invention moves
- Fig. 14 shows the reference signal received by the receiving station as the receiving station moves in Fig. 13.
- FIG. 15 is a diagram for explaining an example of calculation of the time variation of the channel response in the channel time variation detecting unit 3 according to the present invention, and shows the time and the channel response parameters at that time.
- FIG. 16 is a view for explaining an example of calculation of the amount of time variation of the transmission path response in the transmission path time variation detection unit 3 according to the present invention, and shows a relationship between time and a parameter representing the transmission path response.
- FIG. 1 is a block diagram showing an example of the internal configuration of the wireless communication device according to the first embodiment of the present invention.
- the wireless communication device 100 shown in FIG. 1 is composed of a reception RF unit 1, a demodulation unit 2, a transmission path time fluctuation detection unit 3, a wireless signal insertion interval determination unit 4, a transmission unit 5, and a transmission RF unit 6. Have been.
- the reception RF section 1 converts a radio signal received from the transmission path by the antenna 9 into a signal that can be processed by the physical layer, and supplies the converted signal to the demodulation section 2 and the transmission path time variation detection section 3.
- Demodulation section 2 performs demodulation processing of the signal supplied from reception RF section 1, and outputs the demodulated signal as received data to an upper layer.
- the transmission path time variation detection section 3 detects the time variation of the transmission path response using the signal supplied from the reception RF section 1.
- the detection result of the time variation of the transmission path response detected by the transmission path time variation detection section 3 is supplied to the pilot signal insertion interval determination section 4, and the pilot signal insertion interval determination section 4 Determines the optimal Pilot signal (known reference signal, also called pilot symbol) insertion interval on the transmission path of the communication with the wireless communication device that is the source of the received and analyzed received signal. .
- the determination of the insertion interval of the pilot signal can be paraphrased as the determination of the data length or the interval between frames included in the pilot signal.
- the time variation of the channel response can be detected by referring to two or more identical known reference signals (pilot signals) included in the received signal.
- pilot signals For example, in a wireless communication system using a plurality of continuous known symbols (pilot signals), a pilot signal is continuously inserted into a transmission signal, and a time variation of a transmission path response is generated from the continuous pilot signal. It is possible to detect the quantity.
- OFDM Orthogonal Frequency Division Multiplex
- a signal having the same waveform is repeatedly used in a noise signal, and transmission is performed by referring to the signal having the same waveform. It is possible to detect the time variation of the road response.
- the detection accuracy can be improved by using the average of multiple (three or more) identical signals, or by detecting multiple time variations in the transmission response and using the average of the multiple detection results. It becomes.
- the received signal r (t) when the signal is transmitted from the transmitting station to the receiving station at time t is given by s (t) as the transmitted signal.
- At and ⁇ t are the amplitude response and the phase response of the transmission path at time t, respectively, and 1 is the number of paths from the transmitting station to the receiving station (here, the number of paths L). .
- the transmitting and receiving stations do not move and the environment in which they are installed does not change over time (for example, if they are installed in an environment where there is no obstacle on the route),) and et ) Is constant, so the transmission line characteristics do not fluctuate over time.
- the spatial position of one or more of the transmitting station, the receiving station, and the surrounding environment (reflectors, obstructions) changes with time, the path and distance of the signal arriving from the transmitting station to the receiving station may vary. Since they change according to their time changes, At) and will change with time.
- FIG. 13 is a schematic diagram showing an example of a path change when the receiving station according to the present invention moves
- FIG. 14 shows a signal received by the receiving station with the movement of the receiving station shown in FIG.
- FIG. 5 is a schematic diagram showing a state of a time change of a reference signal S. As shown in FIG. 14, the reference signal S received by the receiving station changes greatly as the receiving station moves.
- time t If there is a delay (delay) in the time that the signal s (t Q ) transmitted from the transmitting station reaches the receiving station through multiple paths, At) and ⁇ ⁇ ! (t) is a parameter A ⁇ f) and ⁇ t, f) that depend not only on the time t but also on the frequency f, but in this specification, the effect of the frequency f is ignored.
- the time variation of the transmission line response is the amount of change in the transmission line response that changes per unit time, and is one or a combination of any of the following (1) to (5).
- the time variation detection unit 3 calculates the amount of change, and outputs the calculation result.
- (1) and (2) are handled in the local coordinate system (r, 6), and (3) and (4) are handled in the rectangular coordinate system (i, q).
- FIG. 15 is a view for explaining an example of calculation of the time variation of the transmission path response in the transmission path time variation detection unit 3 according to the present invention, and is a diagram showing the time and the transmission path response parameter at that time. It is.
- FIG. 16 is a view for explaining an example of calculation of the time variation of the transmission path response in the transmission path time variation detection unit 3 according to the present invention.
- the time variation of the amplitude, phase, I-ch, and Q-ch of the channel response is, for example, As shown in Figure 16.
- the pilot signal insertion interval determination unit 4 determines the insertion interval of the pilot signal.
- the simplest method of determining the pilot interval is to determine whether the time variation of the transmission path response is larger or smaller than a predetermined threshold, and if the time variation of the transmission path response is larger than the predetermined threshold.
- the insertion interval of the pilot signal is made dense, and if the time variation of the channel response is smaller than a predetermined threshold, the insertion interval of the pilot signal is made sparse.
- the insertion interval of the pilot signal can be determined from the time variation of the transmission response with reference to a predetermined correspondence table indicating the correspondence between the detection result and the insertion interval.
- the insertion interval of the pilot signal (combination with the modulation method)
- the values obtained by the transmission path time variation detection unit 3 are the same.
- phase modulation methods such as BPSK (Binary Phase Shift Keying) and QPSK (Quadrature Phase Shift Keying)
- information is only included in the phase direction. It is not included in the amplitude direction. Therefore, even if the time variation in the amplitude direction is large, if the amount of phase change per unit time is small, it is possible to increase the insertion interval of the pilot signal.
- the pilot signal insertion interval determined by pilot signal insertion interval determination section 4 is supplied to transmission section 5, and transmission section 5 converts the pilot data into pilot data in accordance with the pilot signal insertion interval. It performs a process of inputting a reset signal and other transmission processes.
- the transmission RF section 6 converts the data processed and output by the transmission section 5 into a radio signal, and transmits the radio signal from the antenna 9 toward the transmission path.
- the wireless communication apparatus 100 shown in FIG. 1 detects the time variation of the transmission path response based on the received signal, and Using the time variation of the transmission path response determined, the insertion interval of the next pilot signal to be transmitted is determined, and the data to be transmitted is included in the data to be transmitted based on the determined insertion interval of the pilot signal. It becomes possible to perform transmission processing by inserting a pilot signal. That is, it is possible to insert a pilot signal in accordance with the optimal insertion interval of the pilot signal determined according to the time variation of the transmission path response.
- FIG. 2 is a block diagram showing an example of the internal configuration of the 'wireless communication device according to the second embodiment of the present invention.
- the radio communication apparatus 100 shown in FIG. 2 includes a reception RF unit 1, a demodulation unit 2, a transmission path time variation detection unit 3, a pilot signal insertion interval determination unit 4, a MAC division unit 11, and a PHY transmission unit 1 2 And a transmitting RF unit 6 having the following.
- the second embodiment describes the detailed configuration of the transmission unit 5 in the first embodiment, and includes a reception RF unit 1, a demodulation unit 2, a transmission path time variation detection unit 3, Pilot signal insertion interval determination section 4 and transmission RF section 6 are the same as those in the first embodiment.
- FIG. 3A to 3C are schematic diagrams showing the structure of data processed in the wireless communication device according to the second embodiment of the present invention.
- FIG. 3A is supplied from an upper layer.
- FIG. 3B is a schematic diagram showing transmission data (data supplied to the MAC division unit 11)
- FIG. 3B is a schematic diagram showing data processed by the MAC division unit 11,
- FIG. 3C is a PHY transmission unit 1
- FIG. 4 is a schematic diagram showing data after the processing in 2;
- the transmission unit 5 includes a MAC division unit 11 and a PHY transmission unit 12.
- the transmission interval of the pilot signal determined by the pilot signal insertion interval determination unit 4 is determined by the MAC division unit. 1 Connected to be supplied to 1.
- the MAC division unit 11 receives transmission data from the upper layer and divides the transmission data according to the input interval of the pilot signal determined by the pilot signal input interval determination unit 4. Add a MAC header.
- the processed data has the structure shown in FIG. 3B.
- the MAC header length a; the PHY header length; the insertion interval of the pilot signal in the transmission signal finally transmitted to the transmission path is optimized, such as by setting the transmission data division length in the MAC division unit 11 to L1 Preferably.
- the transmission data processed by the MAC division unit 11 is supplied to the PHY transmission unit 12.
- the PHY transmission section 12 performs transmission processing such as processing for adding a PHY header (a preamble depending on the system), and supplies the processed data to the transmission RF section 6.
- the processed data has the structure shown in FIG. 3C.
- the transmission RF unit 6 converts the data processed and output by the PHY transmission unit 12 into a radio signal, and transmits the radio signal from the antenna 9 to the transmission path.
- the communication device 100 determines the insertion interval of the next pilot signal to be transmitted from the transmission / response time variation detected based on the received signal, and based on the determined pilot signal insertion interval, After the data to be transmitted is divided by an appropriate division length in the MAC layer, transmission processing can be performed by inserting a pilot signal.
- the transmission data transmitted in this manner is transmitted by a plurality of buckets into which pilot signals have been inserted, according to the optimal insertion interval of the pilot signal determined according to the time variation of the channel response. It is composed.
- FIG. 4 is a block diagram illustrating an example of an internal configuration of the wireless communication device according to the third embodiment of the present invention.
- the radio communication device 100 shown in Fig. 4 has a reception RF unit 1, a demodulation unit 2, a transmission path time fluctuation detection unit 3, a pilot signal insertion interval determination unit 4, a MAC division unit 11, and PHY transmission. It comprises a transmitting section 5 having a section 12 and a data combining section 13, and a transmitting RF section 6.
- the third embodiment describes the detailed configuration of the transmission unit 5 in the first embodiment, and includes a reception RF unit 1, a demodulation unit 2, a transmission path time variation detection unit 3, a pilot
- the signal insertion interval determination unit 4 and the transmission RF unit 6 are the same as in the first embodiment.
- FIGS. 5A to 5D are schematic diagrams showing the structure of data processed in the wireless communication device according to the third embodiment of the present invention.
- FIG. 5A is supplied from an upper layer.
- FIG. 5B is a schematic diagram showing transmission data (data supplied to the MAC division unit 11)
- FIG. 5B is a schematic diagram showing data after processing in the MAC division unit 11
- FIG. 5D is a schematic diagram showing data after processing in the transmission unit 13.
- FIG. 5D is a schematic diagram showing data after processing in the transmission unit 12.
- the transmitting section 5 has a MAC dividing section 11, a PHY transmitting section 12, and a data combining section 13, and the packet determined by the pilot signal insertion interval determining section 4 is provided. What is the import interval of the pilot signal?
- the MAC division unit 11 receives transmission data from the upper layer, divides the transmission data in order to optimize the error rate, and adds a MAC header.
- the processed data has the structure shown in FIG. 5B. It should be noted that the cycle of inserting the MAC header in the MAC divider 11 can be determined without depending on the pilot signal insertion interval determined by the pilot signal insertion interval determiner 4.
- the transmission data processed by the MAC division unit 11 is supplied to the data combination unit 13.
- the data combining unit 13 combines the data divided at the time of adding the MAC header so as to form a continuous data again, and supplies the combined data to the PHY transmitting unit 12.
- the processed data has the structure shown in FIG. 5C.
- the PHY transmitting unit 12 performs processing to insert a pilot signal into the data received from the data combining unit 13 in accordance with the pilot signal insertion interval received from the pilot signal insertion interval determining unit 4 and the PHY header (system A transmission process such as a process of adding a preamble (dependent on the preamble) is performed, and the processed data is supplied to the transmission RF unit 6.
- the processed data has the structure shown in FIG. 5D.
- the transmission RF unit 6 converts the data processed and output by the PHY transmission unit 12 into a radio signal, and transmits the radio signal from the antenna 9 to the transmission path.
- radio communication apparatus 100 shown in FIG. 4 transmits the next transmission signal based on the time variation of the transmission path response detected based on the received signal.
- the insertion interval of the pilot signal to be used is determined, while the data divided into arbitrary division lengths in the MAC layer is recombined, and the recombined data is reconstructed based on the determined insertion interval of the packet signal. It is possible to perform transmission processing by inserting a pilot signal into the network.
- the transmission data transmitted in this way is the optimal data determined according to the time variation of the channel response. According to the insertion interval of the pilot signal, the insertion of the pilot signal was performed-constituted by the following data.
- FIG. 6 is a block diagram showing an example of the internal configuration of the wireless communication device according to the fourth embodiment of the present invention.
- the radio communication apparatus 100 shown in FIG. 6 includes a reception RF section 1, a demodulation section 2, a transmission path time fluctuation detection section 3, a pilot signal insertion interval determination section 4, a MAC division length determination section 7, and a 1-division section.
- the transmission unit 5 includes a transmission unit 5 having a transmission unit 11, a PHY transmission unit 12, and a data combining unit 13, and a transmission RF unit 6.
- the fourth embodiment is obtained by adding a MAC division length determination unit 7 to the configuration of the third embodiment, and includes a reception RF unit 1, a demodulation unit 2, a transmission path time variation detection.
- Unit 3 pilot signal input interval determination unit 4, transmission unit 5, and transmission RF unit 6 are the same as those in the third embodiment.
- FIG. 7A to 7D are schematic diagrams showing the structure of data processed in the wireless communication device according to the fourth embodiment of the present invention, and FIG. 7A is supplied from an upper layer.
- FIG. 7B is a schematic diagram showing transmission data (data supplied to the MAC division unit 11)
- FIG. 7B is a schematic diagram showing data after processing in the MAC division unit 11, and
- FIG. 7D is a schematic diagram showing the data after the processing in the filter 11 ⁇ transmitting unit 12;
- FIG. 7D is a schematic diagram showing the data after the processing in the unit 13;
- the detection result of the time variation of the transmission path response detected by the transmission path time variation detection section 3 is based on the pilot signal insertion interval determination section 4 and the MAC division length.
- the MAC division length determining unit 7 determines the length of data divided by the MAC division unit 11. For example, it is possible to determine the MAC division length according to the detection result of the time variation of the transmission path response detected by the transmission path time variation detection unit 3, and to set other parameters such as an error rate. Judge to determine MAC split length It is also possible. Furthermore, it is also possible to determine the MAC division length by combining a plurality of parameters, or to use the shortest MAC division length obtained from each of the plural parameters.
- the MAC division length determined by the MAC division length determination unit 7 is supplied to the MAC division unit 11, and the MAC division unit 11 receives the transmission data from the upper layer, and The transmission data is divided according to (1) and the MAC header is added.
- the processed data has the structure shown in FIG. 7B.
- the transmission data processed by the MAC division unit 11 is supplied to the data combination unit 13.
- the data combining unit 13 combines the data divided at the time of adding the MAC header so as to be a continuous data again, and supplies the combined data to the PHY transmitting unit 12.
- the processed data has the structure shown in FIG. 7C.
- the PHY transmitting unit 12 performs processing to insert a pilot signal into the data received from the data combining unit 13 in accordance with the pilot signal insertion interval received from the pilot signal input interval determining unit 4 and a PHY header (for the system). Transmission processing such as processing for adding a dependent preamble) is performed, and the processed data is supplied to the transmission RF unit 6.
- the processed data has the structure shown in FIG. 7D.
- the transmitting RF unit 6 converts the data processed and output by the PHY transmitting unit 12 into a radio signal, and transmits the radio signal from the antenna 9 to the transmission path.
- the MAC divider 11 detects, for example, the time variation of the channel response detected based on the received signal by the MAC split length determiner 7.
- the transmission data is divided and a MAC header is added, and the data combining section 13 combines these divided data, while the pilot signal insertion interval determining section 4 Determine the input interval of the pilot signal to be transmitted, and use the PHY It becomes possible to perform transmission processing by inserting a pilot signal.
- the transmission data transmitted in this manner is divided by the optimal MAC division length determined by the MAC division length determination unit 11 and the optimal data determined according to the time variation of the channel response. It is composed of a series of data in which the input of the pilot signal is performed according to the input interval of the pilot signal.
- FIG. 8 is a block diagram illustrating an example of the internal configuration of the wireless communication device according to the fifth embodiment of the present invention.
- the radio communication device 100 shown in FIG. 8 includes a reception RF unit 1, a demodulation unit 2, a transmission path time variation detection unit 3, a pilot signal insertion interval determination unit 4, a MAC division unit 11, and a PHY transmission unit 1 2 It comprises a transmitting unit 5 and a transmitting RF unit 6 having a data combining unit 13 and a data dividing unit 14.
- the fifth embodiment describes the detailed configuration of the transmission unit 5 in the first embodiment, and includes a reception RF unit 1, a demodulation unit 2, a transmission path time variation detection unit 3, a PI
- the cut signal insertion interval determination unit 4 and the transmission RF unit 6 are the same as in the first embodiment.
- FIGS. 9A to 9E are schematic diagrams showing the structure of data processed in the wireless communication device according to the fifth embodiment of the present invention.
- FIG. 9A is supplied from an upper layer.
- FIG. 9B is a schematic diagram showing transmission data (data supplied to the MAC division unit 11)
- FIG. 9B is a schematic diagram showing data after processing in the MAC division unit 11
- FIG. 9D is a schematic diagram showing data after processing in the unit 13
- FIG. 9D is a schematic diagram showing data after processing in the data dividing unit 14
- FIG. ⁇ [ ⁇ is a schematic diagram showing data after processing by the transmission unit 12.
- the transmission unit 5 has a MAC division unit 11, 11 ⁇ transmission unit 12, data combining unit 13, data division unit 14, and the pilot signal determined by the pilot signal insertion interval determination unit 4.
- the MAC division unit 11 receives transmission data from the upper layer, divides the transmission data in order to optimize the error rate, and adds a MAC header.
- the processed data has the structure shown in FIG. 9B. Note that the division of transmission data in the MAC division section 11 does not depend on the pilot signal insertion interval determined by the pilot signal insertion interval determination section 4 as in the second embodiment. Absent.
- the transmission data (a plurality of divided data) processed by the MAC dividing unit 11 is sent to the data combining unit 13, and the data combining unit 13 combines the plurality of divided data to form a continuous
- the data is output to the data division unit 14 as data.
- the processed data has the structure shown in FIG. 9C.
- the data dividing unit 14 receives the combined data from the data combining unit 13 and divides the data in accordance with the pilot signal insertion interval determined by the pilot signal insertion interval determining unit 4.
- the processed data has the structure shown in Fig. 9D.
- the data division unit 1 The insertion interval of the pilot signal in the transmission signal finally transmitted to the transmission line should be optimized, for example, by setting the division length of the transmission data in (4) to L-1) 3. Is preferred.
- the transmission data divided by the data division unit 14 is supplied to the PHY transmission unit 12.
- the PHY transmission section 12 performs transmission processing such as processing to add a PHY header (a preamble depending on the system), and supplies the processed data to the transmission RF section 6.
- the processed data has the structure shown in FIG. 9E.
- the transmission RF unit 6 converts the data processed and output by the PHY transmission unit 12 into a radio signal, and transmits the radio signal from the antenna 9 to the transmission path. Send to.
- radio communication apparatus 100 shown in FIG. 8 transmits the next transmission signal based on the time variation of the transmission path response detected based on the received signal.
- the data divided into arbitrary division lengths in the MAC layer is recombined, and the recombined data is recombined based on the determined pilot signal insertion interval. After division by an appropriate division length, it becomes possible to insert a pilot signal and perform transmission processing.
- the transmission data transmitted in this manner is composed of a plurality of buckets into which pilot signals have been inserted in accordance with the optimal pilot signal insertion interval determined according to the time variation of the channel response. You.
- FIG. 10 is a block diagram illustrating an example of the internal configuration of the wireless communication device according to the sixth embodiment of the present invention.
- the radio communication apparatus 100 shown in FIG. 10 includes a reception RF unit 1, a demodulation unit 2, a transmission path time fluctuation detection unit 3, a pilot signal insertion interval determination unit 4, a MAC division length determination unit 7, and a MA.
- the transmission section 5 includes a C division section 11, a PHY transmission section 12, a data combination section 13 and a data division section 14, and a transmission RF section 6.
- the sixth embodiment is obtained by adding a MAC division length determination unit 7 to the configuration of the fifth embodiment, and includes a reception RF unit 1, a demodulation unit 2, a detection of a transmission path time variation.
- Unit 3 pilot signal insertion interval determining unit 4, transmitting unit 5, and transmitting RF unit 6 are the same as in the fifth embodiment.
- FIGS. 11 to 11E are schematic diagrams illustrating a structure of data processed in the wireless communication device according to the sixth embodiment of the present invention.
- FIG. FIG. 11B is a schematic view showing supplied transmission data (data supplied to the MAC division section 11), and FIG. 11B is a schematic view showing data after processing in the MAC division section 11; 1 1C converts the data processed by the data
- FIG. 11D is a schematic diagram showing data after processing in the data dividing unit 14
- FIG. 11E is a schematic diagram showing data after processing in the ⁇ sending unit 12; is there.
- the detection result of the time variation of the transmission path response detected by the transmission path time variation detection section 3 is based on the pilot signal / input interval determination section 4 and the MAC. It is supplied to the division length determination unit 7 respectively.
- the MAC division length determination unit 7 determines the length of data divided by the MAC division unit 11. For example, it is also possible to determine the MAC division length according to the detection result of the time variation of the transmission path response detected by the transmission path time variation detection unit 3, and to set other parameters such as an error rate. Judgment can be made to determine the MAC division length.
- the MAC division length determination unit 7 determines the MAC division length by combining a plurality of parameters, or to use the shortest of the MAC division lengths obtained from each of the plurality of parameters.
- the MAC division length determined by the MAC division length determination unit 7 is supplied to the MAC division unit 11, and the MAC division unit 11 receives the transmission data from the upper layer, The transmission data is divided according to the MAC division length, and a MAC header is added.
- the processed data has the structure shown in FIG. 11B.
- the transmission data (a plurality of divided data) processed by the MAC dividing unit 11 is sent to the data combining unit 13, and the data combining unit 13 combines the plurality of divided data to form a continuous Is output to the data division unit 14 as the data of.
- the processed data has the structure shown in FIG. 11C.
- the data dividing unit 14 receives the combined data from the data combining unit 13 and divides the data according to the insertion interval of the pilot signal determined by the pilot signal insertion interval determining unit 4. .
- the processed data has the structure shown in FIG. 11D.
- the pilot signal input interval When the optimal interval of the insertion interval of the pilot signal determined by the setting unit 4 is L, the division length of the transmission data in the data division unit 14 is set to L— in consideration of the length i9 of the PHY header and the like. For example, it is preferable to optimize the insertion interval of the pilot signal in the transmission signal finally transmitted to the transmission path.
- the transmission data divided by the data division unit 14 is supplied to the transmission unit 12.
- the transmission unit 12 performs transmission processing such as adding a header (a system-dependent preamble), and supplies the processed data to the transmission RF unit 6.
- the processed data has the structure shown in FIG.
- the transmission RF unit 6 converts the data processed and output by the transmission unit 12 into a radio signal, and transmits the radio signal from the antenna 9 to the transmission path.
- the MAC divider 11 detects, for example, the time variation of the channel response detected based on the received signal by the MAC split length determiner 7.
- the transmission data is divided and the MAC header is added, and the data combining section 13 combines these divided data, while the pilot signal insertion interval determining section 4 determines
- the data division unit 14 determines the insertion interval of the pilot signal to be transmitted to the receiver, and the data division unit 14 divides the recombined data into appropriate division lengths based on the determined insertion interval of the pilot signal. It is possible to perform transmission processing by inserting a remote signal.
- the transmission data transmitted in this manner is divided by the optimal MAC division length determined by the MAC division length determination unit 11 and the optimal pipe determined according to the time variation of the transmission path response. Pilot signal input is performed according to the input signal input interval, and is composed of a plurality of buckets.
- FIGS. 3A to 3C As shown in FIGS. 9A to 9E and FIGS. 11A to 11E, the transmission data is divided into a plurality of buckets, and one pilot signal is inserted for each of the divided buckets.
- the mode is illustrated, it is not always necessary to insert one pilot signal in one packet, but it is possible to insert multiple pilot signals in one bucket or one pilot signal in multiple packets. G signal can be imported. Further, it is also possible to insert a pilot signal using an insertion pattern using a function or the like.
- the pilot signals are arranged at regular intervals in a continuous transmission data. Is inserted, but also in this case, it is possible to insert a pilot signal in various insertion patterns.
- FIG. 12 is a block diagram illustrating an example of the internal configuration of the wireless communication device according to the seventh embodiment of the present invention.
- the radio communication apparatus 100 shown in FIG. 12 includes a reception RF unit 1, a demodulation unit 2, a transmission path time fluctuation detection unit 3, a pilot signal insertion interval determination unit 4, a transmission unit 5, and a transmission RF unit 6. I have. Note that each component in the seventh embodiment has the same function as each component in the first embodiment.
- the transmitting unit 5 includes a MAC dividing unit 11 and a PHY transmitting unit 12, and the insertion interval of the pilot signal determined by the pilot signal insertion interval determining unit 4 is equal to the transmission data.
- the wireless communication apparatus 100 shown in FIG. 12 can transmit, as transmission data, the detection result of the time variation of the transmission path response detected by the transmission path time variation detection unit 3.
- the detection result of the time variation of the transmission path response detected by the transmission path time variation detection unit 3 is transmitted to an upper layer. It can be output and used in an application or stored in storage means (not shown).
- the radio communication apparatus 100 shown in FIG. 12 detects the time variation of the transmission path response based on the received signal, Using the detected time variation of the transmission path response, the insertion interval of the pilot signal to be transmitted next is determined, and the determined insertion interval of the pilot signal is notified to the partner wireless communication device. And store it.
- a wireless communication apparatus transmits a signal to a wireless communication apparatus by using a receiving means for receiving a signal transmitted from a partner wireless communication apparatus, and a signal received by the receiving means.
- Transmission path time variation detecting means for detecting the time variation of the channel response; known reference signal insertion interval determining means for determining the insertion interval of the known reference signal using the detected time variation of the channel response.
- the insertion interval of the known reference signal can be reliably determined based on the detection result of the time variation of the channel response.
- a known reference signal insertion means for inserting a known reference signal into the information signal to be transmitted
- a known reference signal Transmission means for transmitting the inserted information signal to the other party's wireless communication device, based on the insertion interval of the known reference signal determined from the detection result of the time variation of the transmission path response.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Mobile Radio Communication Systems (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03811122A EP1569401A1 (en) | 2002-11-11 | 2003-11-11 | Radio communication apparatus and radio communication method |
AU2003277678A AU2003277678A1 (en) | 2002-11-11 | 2003-11-11 | Radio communication apparatus and radio communication method |
US10/534,252 US20060105710A1 (en) | 2002-11-11 | 2003-11-11 | Radio communication apparatus and radio communication method |
CA002504983A CA2504983A1 (en) | 2002-11-11 | 2003-11-11 | Radio communication apparatus and radio communication method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2002-327430 | 2002-11-11 | ||
JP2002327430A JP2004165853A (ja) | 2002-11-11 | 2002-11-11 | 無線通信装置及び無線通信方法 |
Publications (1)
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WO2004045177A1 true WO2004045177A1 (ja) | 2004-05-27 |
Family
ID=32310519
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PCT/JP2003/014331 WO2004045177A1 (ja) | 2002-11-11 | 2003-11-11 | 無線通信装置及び無線通信方法 |
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US (1) | US20060105710A1 (ja) |
EP (1) | EP1569401A1 (ja) |
JP (1) | JP2004165853A (ja) |
KR (1) | KR20050086473A (ja) |
CN (1) | CN1711733A (ja) |
AU (1) | AU2003277678A1 (ja) |
CA (1) | CA2504983A1 (ja) |
WO (1) | WO2004045177A1 (ja) |
Families Citing this family (13)
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JP4746296B2 (ja) * | 2004-09-10 | 2011-08-10 | 株式会社バッファロー | 暗号鍵設定システム、データ通信装置、暗号鍵設定方法 |
JP4189410B2 (ja) * | 2006-06-12 | 2008-12-03 | 株式会社東芝 | 無線通信装置及び送信制御方法 |
KR101314926B1 (ko) * | 2006-12-07 | 2013-10-04 | 인터디지탈 테크날러지 코포레이션 | 트레이닝 신호와 정보 비트들을 할당하기 위한 무선 통신 방법 및 장치 |
JP5161243B2 (ja) * | 2007-02-02 | 2013-03-13 | エルジー エレクトロニクス インコーポレイティド | アンテナスイッチング方法、信号送信方法及びアンテナ選択情報生成方法 |
JP5193618B2 (ja) * | 2008-01-30 | 2013-05-08 | 株式会社日立国際電気 | 干渉波キャンセラ |
JP5295666B2 (ja) * | 2008-07-09 | 2013-09-18 | 株式会社東芝 | 通信機、通信方法 |
CN101729089B (zh) * | 2008-10-23 | 2013-07-10 | 弥亚微电子(上海)有限公司 | 通信系统的发射机、接收机及其同步方法 |
US8867437B2 (en) * | 2010-10-27 | 2014-10-21 | Qualcomm Incorporated | Cell site modem application message interface |
US10855409B2 (en) * | 2016-10-11 | 2020-12-01 | Qualcomm Incorporated | Media access control header and transport block formats |
DE102016220884A1 (de) * | 2016-10-24 | 2018-04-26 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Variable Teilpaketlängen für Telegram Splitting in Netzwerken mit geringem Stromverbrauch |
CN110518957B (zh) * | 2019-07-30 | 2020-11-06 | 北京大学 | 一种开放无线信道中旁路网络导引方法 |
US11736320B2 (en) * | 2022-02-14 | 2023-08-22 | Ultralogic 6G, Llc | Multiplexed amplitude-phase modulation for 5G/6G noise mitigation |
CN116170127B (zh) * | 2023-04-20 | 2023-07-18 | 北京思凌科半导体技术有限公司 | 导频插入方法、装置、存储介质及电子设备 |
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JPH0964925A (ja) * | 1995-08-29 | 1997-03-07 | Toshiba Corp | データ伝送システム |
JPH11331234A (ja) * | 1998-05-12 | 1999-11-30 | Nec Corp | ネットワークシステム、及びネットワークシステムにおけるパケット送信制御方法 |
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JP3588040B2 (ja) * | 2000-07-26 | 2004-11-10 | 松下電器産業株式会社 | 通信端末装置および基地局装置 |
JP3851836B2 (ja) * | 2002-04-19 | 2006-11-29 | 富士通株式会社 | 波長多重伝送システム及び波長多重伝送装置 |
-
2002
- 2002-11-11 JP JP2002327430A patent/JP2004165853A/ja not_active Withdrawn
-
2003
- 2003-11-11 US US10/534,252 patent/US20060105710A1/en not_active Abandoned
- 2003-11-11 KR KR1020057008283A patent/KR20050086473A/ko not_active Application Discontinuation
- 2003-11-11 EP EP03811122A patent/EP1569401A1/en not_active Withdrawn
- 2003-11-11 WO PCT/JP2003/014331 patent/WO2004045177A1/ja not_active Application Discontinuation
- 2003-11-11 CA CA002504983A patent/CA2504983A1/en not_active Abandoned
- 2003-11-11 CN CNA2003801029933A patent/CN1711733A/zh active Pending
- 2003-11-11 AU AU2003277678A patent/AU2003277678A1/en not_active Abandoned
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JPH0964925A (ja) * | 1995-08-29 | 1997-03-07 | Toshiba Corp | データ伝送システム |
JPH11331234A (ja) * | 1998-05-12 | 1999-11-30 | Nec Corp | ネットワークシステム、及びネットワークシステムにおけるパケット送信制御方法 |
JP2001339363A (ja) * | 1999-07-30 | 2001-12-07 | Matsushita Electric Ind Co Ltd | Ofdm信号の伝送方法、送信装置及び受信装置 |
JP2002232387A (ja) * | 2001-02-02 | 2002-08-16 | Toshiba Corp | マルチキャリア信号受信装置 |
Also Published As
Publication number | Publication date |
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EP1569401A1 (en) | 2005-08-31 |
KR20050086473A (ko) | 2005-08-30 |
JP2004165853A (ja) | 2004-06-10 |
AU2003277678A1 (en) | 2004-06-03 |
CN1711733A (zh) | 2005-12-21 |
US20060105710A1 (en) | 2006-05-18 |
CA2504983A1 (en) | 2004-05-27 |
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