WO2007118411A1 - Procédé et dispositif pour le traitement de bande de base de l'émetteur espace-temps/fréquence spatiale/diversité spatiale - Google Patents
Procédé et dispositif pour le traitement de bande de base de l'émetteur espace-temps/fréquence spatiale/diversité spatiale Download PDFInfo
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- WO2007118411A1 WO2007118411A1 PCT/CN2007/001141 CN2007001141W WO2007118411A1 WO 2007118411 A1 WO2007118411 A1 WO 2007118411A1 CN 2007001141 W CN2007001141 W CN 2007001141W WO 2007118411 A1 WO2007118411 A1 WO 2007118411A1
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- 238000010295 mobile communication Methods 0.000 description 4
- 125000004122 cyclic group Chemical group 0.000 description 3
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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
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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
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03159—Arrangements for removing intersymbol interference operating in the frequency domain
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0606—Space-frequency coding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0618—Space-time coding
- H04L1/0625—Transmitter arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0618—Space-time coding
- H04L1/0637—Properties of the code
- H04L1/0668—Orthogonal systems, e.g. using Alamouti codes
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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
- H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
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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
-
- 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
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0042—Arrangements for allocating sub-channels of the transmission path intra-user or intra-terminal allocation
-
- 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
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
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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
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
- H04L5/0046—Determination of how many bits are transmitted on different sub-channels
Definitions
- the present invention relates to a single carrier frequency division multiplexing system for next generation broadband wireless communication or an OFDM (Orthogonal Frequency Division Multiplexing) system called DFT (Discrete Fourier Transform) extension, and more particularly to the system Transmitter structure and method and apparatus for space-time/space-frequency/space diversity transmitter baseband processing.
- OFDM Orthogonal Frequency Division Multiplexing
- DFT Discrete Fourier Transform
- the transmitter baseband structure of the existing single carrier frequency division multiplexing (SC-FDMA) system is: After the information bit stream is encoded, interleaved and constellation modulated, input to the M point DFT module. The input data of the M point DFT module 10 is then mapped by the subcarrier mapping device 20 to the M subcarriers allocated in the N subcarriers.
- the subcarrier mapping mode is divided into a centralized mapping and a distributed mapping. Representing the number of subcarriers allocated by the information transmission.
- the N-IDFT module 30 After the unmapped (NM) subcarriers are set to zero, the N-IDFT module 30 performs an IDFT (inverse discrete Fourier transform) of the N point to the time domain, and then passes The CP insertion device 40 inserts a Cyclic Prefix, which copies the last L CP data of the N-point data set of the output of the N-point IDFT transform to the front, where L CP represents the CP (Cyclic Prefix) length, and then is upsampled. D/A (digital/analog) conversion, carrier modulation, etc. are transmitted through a single antenna.
- IDFT inverse discrete Fourier transform
- the system has been recognized in the industry as the most competitive next-generation broadband wireless communication system. It has the following advantages:
- PAPR peak-to-average ratio
- Orthogonal multi-user access can be provided to avoid multiple access interference (MAI) in the uplink CDMA system;
- MAI multiple access interference
- the insertion of the time domain cyclic prefix CP provides flexible and efficient frequency domain equalization capabilities, and the like. Provides higher peak data rate and spectral efficiency, higher data transmission rate at the cell boundary, and sufficient cells in next-generation mobile communication systems compared to existing mobile communication systems (eg, UMTS systems) Coverage is an important feature.
- next-generation mobile communication systems eg, UMTS systems
- Coverage is an important feature.
- multi-antenna transmission technology will be an important feature of the next generation mobile communication system.
- PAPR peak-to-average ratio
- the present invention achieves effective spatial diversity by providing a transmitter structure of the system and a method and apparatus for space-time/space-frequency/space diversity transmitter baseband processing, while reducing PAPR and Make frequency domain equalization feasible.
- One of the inventions a device for baseband processing of space time diversity transmitter
- the device comprises an M-point DFT module, a space-time coding device and a mapping device, characterized in that: the space-time coding device is connected between an output of the M-point DFT module and an input of the mapping device, wherein: M represents the number of subcarriers allocated to the user.
- the space time coding apparatus is configured to encode at least two and preferably two corresponding symbol groups of the output of the M-point DFT module, and output at least two and preferably two respectively One-to-one data set corresponding to each transmit antenna, wherein: each symbol group contains M symbols;
- the mapping device includes at least two and preferably two subcarrier mapping devices, respectively mapping each data set onto the corresponding antenna, so that the data after the mapping is:
- the order between the mapped data symbols on each antenna remains unchanged compared to the M symbols output by the M-point DFT module; and/or Maintaining the same subcarrier spacing between the mapped symbols; and/or
- the M data on each SC-FDMA symbol after mapping is M output data of the DFT module, or the inverse of the M output data, or the complex conjugate of the M output data, or the negative of the M output data Complex conjugate.
- the encoding can be encoded by Alamouti.
- the output symbol of the M-point DFT module is connected to the space-time coding means by a splitter module.
- mapping manner of the subcarrier mapping apparatus is a centralized mapping or a distributed mapping.
- Second invention a method for baseband processing of space-time diversity transmitter
- the method includes:
- the 2M point data set represented by the system's M-point DFT module is ⁇ S 1 ⁇ 2 ,..., 3 ⁇ 4 ⁇ ⁇ +1 , ''', S 2 ⁇ , divided into two adjacent symbol groups W , , ''', ⁇ and ⁇ +1 ,''', ⁇ ;
- Space-time coding step Alamouti coding data on corresponding symbols of the two adjacent symbol groups, and outputting two data sets;
- mapping step respectively mapping the two data sets onto two antennas, so that the data after mapping is:
- the order between the mapped data symbols on each antenna remains unchanged compared to the M symbols output by the M-point DFT module;
- the same subcarrier spacing is maintained between the mapped symbols;
- the M data on each SC-FDMA symbol after mapping is M output data of the DFT module, or the inverse of the M output data, or the complex conjugate of the M output data, or the negative of the M output data Complex conjugate.
- the two data sets output by the space-time encoding step are of the form:
- the third aspect of the invention a space time diversity transmitter
- the transmitter includes means for baseband processing of the space time diversity transmitter as described above connected between the constellation modulator at the front end of the transmitter and the defective IDFT module at the back end.
- a device for baseband processing of a space frequency diversity transmitter W 200 comprises an M-point DFT module, a space frequency encoding device and a mapping device, characterized in that: the space frequency encoding device is connected between an output end of the M-point DFT module and an input end of the mapping device And for encoding the consecutive M symbols output by the M-point DFT module, outputting at least two and preferably two data sets respectively corresponding to the respective transmit antennas, where: M represents a child allocated to the user Number of carriers.
- the mapping apparatus includes at least two and preferably two subcarrier mapping apparatuses, respectively mapping each data set output by the space frequency encoding apparatus onto the corresponding antenna, so that the data after the mapping is:
- the order between the mapped data symbols on at least one antenna remains unchanged compared to the M symbols output by the DFT module; and/or the same subcarrier spacing is maintained between the mapped symbols; and/or
- the M data on each SC-FDMA symbol is the M output data of the DFT module, or the inverse of the M output data, or the complex conjugate of the M output data, or the negative complex of the M output data. yoke.
- mapping manner of the subcarrier mapping apparatus is a centralized mapping or a distributed mapping.
- Fifth invention method for space frequency diversity transmitting baseband processing
- the method includes:
- the space-frequency coding step the M-point data set of the system's M-point DFT module is output, the M-point data set of ⁇ , the Alamouti coding, and the two data sets output, ⁇ - ⁇ ,-,- ⁇ , "*" Representing a conjugate operation value;
- mapping step respectively mapping the two data sets onto two antennas, so that the data after mapping is:
- the order between the mapped data symbols on at least one of the antennas remains unchanged compared to the one of the symbols output by the DFT module;
- the same subcarrier spacing is maintained between the mapped symbols;
- the data on each SC-FDMA symbol after mapping is one output data of the DFT module, or the opposite of one output data, or the complex conjugate of one output data, or the negative of one output data. Complex conjugate.
- the transmitter includes means for baseband processing of a space frequency diversity transmitter as described above connected between a constellation modulator at the front end of the transmitter and a defective IDFT module at the back end.
- a device for baseband processing of a spatial diversity transmitter Seventh of the present invention, a device for baseband processing of a spatial diversity transmitter
- the apparatus comprises a defect DFT module, an encoding device and a mapping device, and a selection device connected to the encoding device for selecting a space time diversity transmission or a space frequency diversity transmission mode, the coding device according to the selection Selecting a transmission mode selected by the device as a corresponding space-time or space-frequency coding, wherein the coding device is connected between an output end of the M-point DFT module and an input end of the mapping device, where: M represents The number of subcarriers assigned to the user.
- the encoding apparatus when used as space time coding, it encodes corresponding symbols of at least two and preferably two adjacent symbol groups output by the M-point DFT module, and outputs at least two and preferably a data set corresponding to each of the transmit antennas, wherein: each symbol group includes M symbols; and the mapping device includes at least two and preferably two subcarrier mapping devices, respectively mapping each data set to corresponding The antenna is up, so that the data after mapping is: Compared with the M symbols output by the M-point DFT module, the order between the mapped data symbols on each antenna remains unchanged; and/or the mapped symbols remain unchanged The same subcarrier spacing; and/or such that the M data on each SC-FDMA symbol after mapping is the M output data of the DFT module, or the inverse of the M output data, or the total of the M output data Yoke, or negative complex conjugate of M output data.
- the encoding apparatus when used as space-frequency coding, it encodes consecutive M symbols output by the M-point DFT module, and outputs at least two and preferably two corresponding one-to-one corresponding to each transmitting antenna.
- the data set; the mapping means comprises at least two and preferably two subcarrier mapping means, respectively mapping each data set onto the corresponding antenna, so that the data after the mapping satisfies the following requirements, namely: M outputted with the M point DFT module
- M outputted with the M point DFT module The order between the mapped data symbols on at least one antenna remains unchanged; and/or the same subcarrier spacing is maintained between the mapped symbols; and/or each mapped SC-
- the M data on the FDMA symbol is the M output data of the DFT module, or the inverse of the M output data, or the complex conjugate of the M output data, or the negative complex conjugate of the M output data.
- the coding device is placed after the M-point DFT module, and the advantage is that the receiving end can effectively perform space-time decoding and detection in the frequency domain, thereby avoiding complicated multipath signals in the time domain. Equilibrium and processing.
- the present invention proposes an effective space/space frequency coding and mapping method, which can effectively reduce the PAPR (peak to average power ratio) of the transmitted signal, thereby making the power amplifier in the transmitter more efficient. Therefore, in the uplink communication link (ie, from the terminal mobile station to the base station), the battery life of the terminal can be extended, or under the same battery usage time, the lower PAPR can enable the terminal to transmit at a larger transmission power. Thereby effectively increasing the coverage area of the cell.
- FIG. 1 is a schematic structural diagram of a conventional apparatus for baseband processing of a transmitter of an SC-FDMA system
- FIG. 2(a) to (b) are schematic diagrams showing the structure of a baseband processing apparatus for a space-time diversity transmitter of an SC-FDMA system according to the present invention; (It embodies two space-time coding and mapping methods);
- FIG. 3 is a schematic view showing the structure of a baseband processing apparatus for a SC-FDMA system space-frequency diversity transmitter in the present invention
- FIG. 4 is a schematic diagram of comparison of PAPR of two transmit antennas of the space-time diversity SC-FDMA system of the present invention with several other schemes, wherein: FIG. 4(a) and FIG. 4(b) respectively show centralized subcarrier mapping and Simulation results in the case of distributed subcarrier mapping.
- FIG. 5 is a schematic diagram of comparison of PAPR of two transmit antennas of the SC-FDMA system of the present invention for space-frequency diversity and other schemes, wherein FIG. 5(a) and FIG. 5(b) respectively show centralized subcarrier mapping and distribution. Simulation results in the case of subcarrier mapping;
- FIG. 6 is a block diagram showing the structure of a SC-FDMA system spatial diversity transmitter baseband processing apparatus in the present invention. detailed description
- M represents the number of subcarriers allocated to the end user
- N represents the total number of subcarriers.
- the 1024-point IDFT transform is used to assign to a certain number of subcarriers.
- Figure 2 shows the Sub-carrier Mapping module with localized Sub-carrier Mapping as an example.
- the space time diversity transmitter of the present invention includes a constellation modulation module 101, an M-point DFT module 102, a splitter module 103, a space time coding module 104, and two subcarrier mapping devices 105.
- the input data of the constellation modulation module 101 is a bit stream outputted by the output channel of the channel coder of the user terminal after interleaving by the interleaver, and the constellation modulation module 101 represents constellation modulation, such as BPSK (two phase phase shift keying), QPSK (four phase) Phase shift keying), 8PSK (eight phase shift keying), 16QAM (hexadecimal phase shift keying), 64QAM (sixteen phase shift keying), etc.
- the modulation symbol output by the constellation modulation module 101 is M
- the point DFT (Discrete Fourier Transform) module 102 transforms and outputs it to a splitter module 103, dividing each successive M symbols into two paths.
- a space-time coding apparatus configured to encode corresponding symbols of two adjacent symbol groups output by the M-point DFT module, and output two data sets respectively corresponding to the respective transmit antennas, wherein: each symbol group includes M symbols.
- the two channels of data output by the splitter module 103 that is, two and each of the M symbols
- the group of symbols can be represented as: and ⁇ +1 ,...,3 ⁇ 4 ⁇ , and the two channels of data pass through the space-time coding module 104, and the two channels of data output are ⁇ , , - +1 ⁇ .
- the two data sets are respectively mapped to the two antennas through the two subcarrier mapping devices 105, and the mapping manner is to set the first M data in the set and The M data are respectively mapped to two SC-FDMA symbols adjacent to each other, and the mapping of the M data of each SC-FDMA symbol should be based on the subcarrier resources allocated by the user terminal.
- the data after mapping meets:
- the M data on each SC-FDMA symbol after mapping is M output data of the DFT module, or the inverse of the M output data, or the complex conjugate of the M output data, or the negative of the M output data Complex conjugate.
- mapping can be divided into centralized mapping and distributed mapping.
- centralized mapping refers to mapping M data to consecutive M subcarriers.
- distributed mapping refers to placing M data at regular intervals. Map to M subcarriers.
- space-time coding is not Alamouti coding (ie a space-time coding method) for adjacent symbols (eg 8! and S 2 ) in the symbol group output by the M-point DFT module, but the module
- the corresponding symbols of the output adjacent symbol groups are Alamouti encoded, for example, the first symbol 3! of the first symbol group and the first symbol S M+1 of the second symbol group are encoded.
- the coding matrix is as follows:
- the number of rows corresponds to the transmit antenna, and the number of columns corresponds to the SC-FDMA symbol, for example, the first SC-FDMA symbol of the first transmit antenna is transmitted, and -S M+1 * the second of the first transmit antenna SC-FDMA symbol transmission, and so on.
- "" means taking the conjugate operation.
- the space-time coding module can also be encoded as In this case, the structure of the space-time diversity transmitter baseband processing apparatus of the SC-FDMA system is as shown in Fig. 2(b).
- PAPR peak to average power ratio
- Space-frequency diversity transmitter for SC-FDMA system and apparatus and method for baseband processing of space-frequency diversity transmitter
- the space frequency diversity transmitter of the present invention includes a constellation modulation module 201, an M-point DFT module 202, a space time coding module 204, and two subcarrier mapping devices 205.
- FIG. 3 is a schematic diagram of a sub-carrier mapping module 205 with localized Sub-carrier mapping as an example.
- the output of the sub-carrier mapping device 205 is only mapped to the allocated sub-carriers of one SC-FDMA symbol, and the space-frequency coding module 204 is only used in FIG.
- Shown as the recommended space-frequency coding method that is, the two data sets generated after encoding and mapping the input are represented as and , instead of ⁇ , - and ..., (this mode is represented as SFC 2 in Figure 5) and other empty Frequency coding and mapping, unlike the space-time diversity system, the hollow-time coding module can have two different space-time coding modes.
- the mapping device includes two subcarrier mapping devices, and respectively maps each data set output by the space frequency encoding device to a corresponding antenna, so that the data after the mapping satisfies:
- the order between the mapped data symbols on at least one antenna remains unchanged;
- the M data on each SC-FDMA symbol after mapping is made M data of the DFT module, or a negative complex conjugate of the M output data.
- the space frequency coding method shown in FIG. 3 minimizes the PAPR value of the transmitted signal, thereby Can improve the efficiency of the terminal amplifier.
- the method for space-frequency diversity transmission baseband processing of a single carrier frequency division multiplexing system includes the following steps: performing an Alamouti coding and encoding, and outputting two data sets, for the M-point data set represented by the M-point DFT module output of the system, ⁇ - S .., - +1 ⁇ , " * " means to take the conjugate operation value;
- the two data sets are respectively mapped onto two antennas, that is, only M data in the data set is mapped onto only one SC-FDMA symbol.
- the sub-carrier mapping part is exemplified by a localized sub-carrier mapping.
- the space-time sum proposed by the solution is Space-frequency diversity transmitter design can be applied to distributed sub-carrier mapping ( D )
- the spatial diversity transmitter includes an M-point DFT module 302, a space/space frequency coding device 304, a selection device 306, and two subcarrier mapping devices 305.
- the selection device 306 is configured to select space time diversity transmission or space frequency diversity. Transmit, and the encoding device 304 performs corresponding space-time or space-frequency coding according to the selected transmission mode.
- An encoding device 304 is coupled to the output of the M-point DFT module 302, where: M represents the number of subcarriers allocated to the user.
- the encoding device 304 When the encoding device 304 is used as space time encoding, it performs Alamouti encoding on the corresponding symbols of two adjacent symbol groups output by the M-point DFT module 302, and outputs two data sets respectively corresponding to the two transmitting antennas, wherein:
- the symbol group contains M symbols.
- the two subcarrier mapping means 305 respectively map the two data sets onto the two antennas so that the data after the mapping is:
- the encoding device 304 When the encoding device 304 is used as the space frequency encoding, it performs Alamouti encoding on the consecutive M symbols output from the M-point DFT module 302, and outputs two data sets respectively corresponding to the two transmitting antennas.
- Two subcarrier mapping At 305 two data sets are respectively mapped onto the two antennas, so that the data after the mapping meets the following requirements, namely:
- the order between the mapped data symbols on at least one antenna remains unchanged;
- the M data on each SC-FDMA symbol after mapping is M output data of the DFT module, or the inverse of the M output data, or the complex conjugate of the M output data, or the negative of the M output data Complex conjugate.
- the peak-to-average power ratio is computer simulated and analyzed, as shown in Fig. 4 and Fig. 5.
- Figure 4 shows the PAPR of two transmit antennas of a space-time diversity SC-FDMA system compared with several other schemes, where (a) and (b) show centralized subcarrier mapping and distributed subcarriers, respectively. Simulation results in the case of mapping.
- STC in the curve label (space-time coding, that is, space-time scheme) 1 refers to the scheme of Figure 2 (a)
- STC 2 refers to the scheme of Figure 2 (b).
- the distributed interval is assumed to be 8. It can be seen from the figure that under the simulated conditions, the proposed space-time diversity system design is exactly the same as the PAPR under a single transmit antenna, and the PAPR value of the OFDM system under the same condition is reduced by 1.5 db. about. In addition, as can be seen from the figure, the PAPR values of the space-time diversity system design are basically the same under centralized and distributed conditions.
- Figure 5 shows a comparison of the PAPR of two transmit antennas of the SC-FDMA system of the space-frequency diversity with several other schemes, wherein (a) and (b) represent centralized subcarrier mapping and distribution, respectively. Simulation results in the case of subcarrier mapping.
- SFC space-frequency coding, that is, space-frequency scheme
- SFC 2 refers to another space-frequency coding and mapping scheme.
- the space frequency detection assumes that the channel coefficients corresponding to the two subcarriers of the space frequency coding are approximately the same, that is, the channel quasi-static condition, in the simulation, the paired distributed mapping is adopted, and the phase is used.
- the interval between two pairs of neighbors is also 8 subcarriers.
- the PAPR of the designed design of the present invention deteriorates by about 0.7 db compared with the single shot, but is still about 0.8 db better than the OFDM system.
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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KR1020087024999A KR101286996B1 (ko) | 2006-04-13 | 2007-04-09 | 공간 시간/공간 주파수/공간 다이버시티 전송기의 기저대역처리를 위한 방법 및 디바이스 |
US12/296,841 US8248909B2 (en) | 2006-04-13 | 2007-04-09 | Method and device for the baseband process of the space-time/space-frequency/spatial diversity transmitter |
EP07720714.0A EP2015532B8 (en) | 2006-04-13 | 2007-04-09 | A method and device for the baseband process of the space time/ space frequency/ space diversity transmitter |
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CN2006100256812A CN101056132B (zh) | 2006-04-13 | 2006-04-13 | 用于空时/空频/空间分集发射机基带处理的方法及装置 |
CN200610025681.2 | 2006-04-13 |
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PCT/CN2007/001141 WO2007118411A1 (fr) | 2006-04-13 | 2007-04-09 | Procédé et dispositif pour le traitement de bande de base de l'émetteur espace-temps/fréquence spatiale/diversité spatiale |
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EP (1) | EP2015532B8 (zh) |
KR (1) | KR101286996B1 (zh) |
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Publication number | Publication date |
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EP2015532A1 (en) | 2009-01-14 |
CN101056132A (zh) | 2007-10-17 |
EP2015532A4 (en) | 2013-09-04 |
US20090303866A1 (en) | 2009-12-10 |
EP2015532B8 (en) | 2018-05-23 |
KR101286996B1 (ko) | 2013-07-23 |
CN101056132B (zh) | 2011-04-20 |
US8248909B2 (en) | 2012-08-21 |
KR20080109845A (ko) | 2008-12-17 |
EP2015532B1 (en) | 2018-03-28 |
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