WO2007105765A1 - 無線送信装置及び無線送信方法 - Google Patents
無線送信装置及び無線送信方法 Download PDFInfo
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- WO2007105765A1 WO2007105765A1 PCT/JP2007/055119 JP2007055119W WO2007105765A1 WO 2007105765 A1 WO2007105765 A1 WO 2007105765A1 JP 2007055119 W JP2007055119 W JP 2007055119W WO 2007105765 A1 WO2007105765 A1 WO 2007105765A1
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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]
- H04L27/2607—Cyclic extensions
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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
- H04L1/00—Arrangements for detecting or preventing errors in the information received
-
- 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
- H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
- H04L1/0079—Formats for control data
- H04L1/0081—Formats specially adapted to avoid errors in the feedback channel
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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
- H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
- H04L1/0086—Unequal error protection
- H04L1/0088—Unequal error protection in control part
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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
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
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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
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
Definitions
- the present invention relates to a radio transmission apparatus and radio transmission method, and more particularly to a radio transmission apparatus and radio transmission method used in a single carrier transmission system.
- frequency equalization single carrier transmission systems have been studied for next-generation mobile communication systems.
- data symbols arranged in the time axis direction are transmitted on a single carrier.
- the receiver corrects the distortion of the signal in the transmission line by equalizing the distortion on the frequency axis. More specifically, a channel estimation value is calculated for each frequency on the frequency axis, and weighting is performed to equalize the channel distortion for each frequency. Then, the received data is demodulated.
- Patent Document 1 As such a frequency equalization single carrier transmission system, there is a technique disclosed in Patent Document 1, and this technique will be briefly described below.
- a predetermined part of the rear part of the transmission data (data part in the figure) is defined as a guard interval (hereinafter abbreviated as “GI”).
- GI guard interval
- the signal generated in this way is transmitted from the transmitting device, and the direct wave and the delayed wave are combined in the propagation path to reach the receiving device.
- the receiving device performs timing synchronization processing on the received data, and extracts a data length signal from the head of the direct wave data portion.
- the extracted signal includes a direct wave component, a delayed wave component, and a noise component in the receiving device, and becomes a signal in which these components are combined.
- the extracted signal is subjected to waveform distortion equalization processing (frequency axis equalization) on the frequency axis and demodulated.
- GI may also be referred to as a cyclic prefix.
- Patent Document 1 Japanese Unexamined Patent Application Publication No. 2004-349889
- An object of the present invention is to provide a wireless transmission device and a wireless transmission method that can improve reception quality by effectively using GI.
- the radio transmitting apparatus of the present invention maps CQI or TFCI to a portion corresponding to the data portion trailing edge force cyclic prefix length of the first block of the subframe, and after the data portion of the block subsequent to the first block.
- a mapping means that maps ACK or NACK to the portion corresponding to the end force cyclic prefix length and a cyclic prefix with the cyclic prefix length also generated in the data portion, and the generated cyclic prefix is added to the head of the data portion
- a transmission means for transmitting the data with the cyclic prefix added is provided.
- FIG. 2 is a diagram for explaining reception processing in the receiving device disclosed in Patent Document 1.
- FIG. 3 is a block diagram showing a configuration of a receiving apparatus according to Embodiment 1 of the present invention.
- FIG. 4 is a diagram showing data received by the receiving device shown in FIG.
- FIG. 5 is a diagram for explaining reception processing in the receiving apparatus shown in FIG.
- FIG. 6 is a block diagram showing a configuration of a transmitting apparatus according to Embodiment 2 of the present invention.
- FIG. 16 Block diagram showing the configuration of a receiving apparatus according to Embodiment 4 of the present invention.
- FIG. 17 1 Diagram for explanation of reception processing in the receiver shown in Fig. 16]
- FIG. 18: 1 is a block diagram showing the configuration of the transmitting apparatus according to Embodiment 4 of the present invention.
- FIG. 21 is a diagram for explaining reception processing in Embodiment 5 of the present invention.
- FIG. 3 is a block diagram showing a configuration of receiving apparatus 100 according to Embodiment 1 of the present invention.
- a reception RF unit 102 performs predetermined radio reception processing such as down-conversion and AZD conversion on a signal received via an antenna 101, and the processed signal is directly transmitted to a direct wave timing detection unit 103, The data is output to the data extraction unit 104, the maximum delay time detection unit 105, and the GI extraction unit 107.
- the direct wave timing detection unit 103 detects the timing (direct wave timing) at the beginning of the data portion of the direct wave as shown in FIG. 4 from the signal output from the reception RF unit 102 and detects the detected timing.
- the imming is output to the data extraction unit 104 and the GI extraction unit 107.
- the data extraction unit 104 Based on the timing output from the direct wave timing detection unit 103, the data extraction unit 104 also extracts a signal having a data portion length T of the data portion head force of the direct wave of the signal output from the reception RF unit 102. The extracted signal is output to the synthesis unit 109.
- Maximum delay time detection section 105 detects the maximum time (maximum delay time ⁇ max) of the signal power delay wave output from reception RF section 102, and extracts the detected maximum delay time ⁇ max GI length determination Output to part 106.
- Extraction GI length determination unit 106 acquires T indicating the GI length of received data, and also acquires the acquired T force.
- the length obtained by subtracting max as the maximum delay time is output to the GI extraction unit 107 and the data separation unit 111.
- the GI extraction unit 107 extracts the GI having the length obtained by the extraction GI length determination unit 106, the signal power output from the reception RF unit 102, and extracts the extracted GI (hereinafter referred to as "extraction GI"). Output to data position adjustment unit 108.
- the data position adjustment unit 108 adjusts the rear end of the extraction GI output from the GI extraction unit 107 to the position of the rear end of the data unit, and outputs the extracted GI with the adjusted data position to the synthesis unit 109.
- Combining section 109 combines the data section output from data extracting section 104 and the extracted GI output from data position adjusting section 108, and outputs the combined signal to frequency axis equalization processing section 110. To do.
- the frequency axis equalization processing unit 110 corrects the distortion by equalizing the distortion of the signal output from the synthesis unit 109 on the frequency axis, and outputs the corrected signal to the data separation unit 111.
- the data separation unit 111 separates the signal output from the frequency axis equalization processing unit 110 at a position that is traced back by the extraction GI length determined by the data portion rear end force extraction GI length determination unit 106. That is, the portion where the extracted GI is synthesized is separated from the data portion. The portion including the beginning of the data part where the extracted GI is not synthesized is output to the demodulator 112, and the portion including the rear end of the data part where the extracted GI is synthesized is output to the demodulator 113.
- Demodulator 112 and demodulator 113 demodulate the data output from data separator 111, demodulator 112 outputs demodulated data A, and demodulator 113 outputs demodulated data B, respectively.
- the operation of receiving apparatus 100 having the above-described configuration will be described using FIG.
- the direct wave data portion leading force data portion length T is obtained for the received signal in which the direct wave component, the delayed wave component, and the noise component in the receiver (hereinafter simply referred to as “noise component”) are combined. Extract.
- the GI extraction unit 107 the GI part obtained by subtracting the maximum delay time ⁇ max from the GI length T
- the GI for the maximum delay time ⁇ max from the head of the data part (the rear end of the GI), that is, the GI of the part that is not affected by the temporally adjacent data is extracted.
- the data position adjustment unit 108 the data position of the extraction GI is adjusted so that the trailing edge of the extraction GI matches the trailing edge of the extracted data part, and the extracted GI and the data part are adjusted.
- the synthesis unit 109 the extracted GI is the same signal as the rear end portion of the data portion extracted by the data extracting unit 104, and in particular, since the noise components included in the portion to be combined are different from each other, these are combined.
- the SNR Signal to Noise Ratio
- the signal synthesized by the synthesis unit 109 is equalized in the signal distortion by the frequency axis equalization processing unit 110, and the SNR is improved in the part where the extraction GI is synthesized. Can do.
- Embodiment 1 a portion that is not subjected to interference of temporally adjacent data is extracted from the GI included in the received signal, and the extracted GI portion is used as the rear end portion of the data portion.
- the SNR improves in some of the OFDM symbols on the time axis by combining the GI parts.
- the OFDM symbol is converted from the time axis to the frequency axis, the improvement in SNR is equally distributed to all subcarriers constituting the OFDM symbol.
- the SNR of each symbol mapped to each subcarrier is equally improved.
- the improvement is small.
- single carrier transmission since symbols arranged on the time axis are transmitted by a single carrier, only the symbol that is the source of GI is synthesized by combining the GI parts. SNR can be improved.
- the improvement in SNR is expected to be very large, about 3 dB.
- the SNR of each symbol can only be improved by a small! /, Degree! /, Etc.
- GI For some symbols that are the basis of the SNR, the SNR can only be increased by a large! / And a degree! /.
- This embodiment focuses on the characteristics of the GI portion in such single carrier transmission.
- FIG. 6 is a block diagram showing a configuration of transmitting apparatus 200 according to Embodiment 2 of the present invention.
- the reception RF section 202 performs predetermined radio reception processing such as down-conversion and AZD conversion on the signal received via the antenna 201, and sends the processed signal to the max information acquisition section 203. Output.
- the ⁇ max information acquisition unit 203 acquires ⁇ max information indicating the maximum time (maximum delay time) of the delayed wave in the communication partner included in the signal output from the reception RF unit 202.
- the information is output to the data mapping determination unit 204.
- the data mapping determination unit 204 determines a data mapping method based on the ⁇ max information output from the ⁇ max information acquisition unit 203 and notifies the data mapping unit 207 of the determined data mapping method.
- the data mapping method will be described later.
- the transmission data is separated into data A and data B.
- Data A is input to modulation section 205 and data B is input to modulation section 206.
- Modulation section 205 and modulation section 206 modulate the input data using a modulation scheme such as PSK modulation or QAM modulation, and output the modulated signal to data mapping section 207.
- a modulation scheme such as PSK modulation or QAM modulation
- Data mapping section 207 performs data mapping on the signals output from modulation section 205 and modulation section 206 using the data mapping method determined by data mapping determination section 204, and outputs the mapped signal to GI addition section 208.
- the GI adding unit 208 generates a GI by copying a predetermined part from the rear end of the data portion of the signal output from the data mapping unit 207, and adds the generated GI to the head of the data portion.
- the signal is output to the transmission RF unit 209.
- the data part length is 16 symbols
- the GI length is 4 symbols
- symbols arranged in order from the top of the data part are distinguished by symbol numbers 1 to 16.
- the GI data is also generated by copying 4 symbols of the GI length, that is, symbol numbers 13 to 16, for the rear end force of the data section.
- Transmission RF section 209 performs predetermined radio transmission processing such as DZA conversion and up-conversion on the signal output from GI addition section 208, and transmits the processed signal via antenna 201. I believe.
- the data mapping determining unit 204 obtains max information that has been transmitted (feedback) to the communication partner power, and, as shown in FIG. 8, the unit corresponding to (T ⁇ max) from the rear end of the data unit.
- the parts where the error rate characteristics improve in receiving apparatus 100 described in Embodiment 1 are the control channel, systematic bits, retransmission bits, ACKZNACK information (A CK or NACK), and CQI (Channel Quality Indicator).
- TFCI Transport Format Combination Indicator
- important information such as pilots and parabits are mapped. According to this method, important information can be accurately transmitted to the receiving device.
- data mapping section 207 includes data A Is mapped to the part corresponding to (T-and max) from the rear end of the data part.
- Data B is mapped to the remaining data part.
- the second embodiment based on the ⁇ max information, a portion where the error rate characteristic is improved is obtained, and the important information is mapped to the obtained portion, thereby accurately identifying the important information. Therefore, it is possible to improve the throughput of the entire system.
- the FDD method is applied, and ⁇ max information is the communication partner power field.
- the TDD scheme may be applied.
- the forces FD D and TDD that can measure max based on the received signal are used.
- the method for obtaining these ⁇ max is not limited.
- the power for explaining the data mapping method based on the ⁇ max information as the data mapping method will be explained.
- the data mapping method described in the second embodiment will be referred to as method A, and methods B to E different from method A will be described.
- ⁇ max fluctuates, so the error rate characteristics are not improved by all the mapped important information, but it is difficult to obtain max information.
- the possibility of improving the error rate characteristics of important information can be increased.
- Method C is a portion in which the rear end force of the data portion also corresponds to the GI length (T).
- r max can vary from 0 to T, ⁇ max
- the error rate becomes the same as the other parts, and the improvement of the error rate characteristic cannot be expected.
- ⁇ ⁇ & ⁇ is between 0 and T, so as shown in FIG.
- the symbol with improved error rate characteristics also increases the trailing edge of the data portion.
- the closer to the rear end of the data part the higher the possibility of the error rate characteristic improving.
- the farther the data part rear end force the lower the possibility of improving the error rate characteristic.
- method D is to determine the importance of data, and to map the rear end force of the data portion over the entire data portion in descending order of importance. According to this method D, the mapping process over the entire data section can be simplified and can be easily performed.
- method E includes a portion in which the rear end force of the data portion corresponds to the GI length (T).
- the important information is mapped to the parts other than the symbol positions at both ends in the GI source part.
- important information is preferentially mapped to the central part of the GI source, and important information is not mapped to both ends. This is due to the following reason.
- the direct wave timing detected on the receiving device side may be detected with a slight shift forward or backward from the correct direct wave timing.
- interference with adjacent symbols occurs at both ends of the GI.
- the SNR improvement may be small for both ends of the GI source.
- Method E ⁇ max information is not necessary, and therefore it is not necessary to provide the transmitter with a ⁇ max information acquisition unit. The same applies to methods B to D.
- control information transmitted on the control channel information that requires a good error rate characteristic while allowing delay in the subframe (for example, ACKZNAKCK information, etc.)
- ACKZNACK ⁇ Blue Bullet (ACK or NACK) for GIs # 2 to # 4 Bing.
- symbols that contain the amount of CQI information in the T part (four symbols in Fig. 7)
- the CQI is mapped beyond the T portion from the rear end of the block # 1, as shown in Figure 13. In other words, CQI is transmitted in only one block.
- the amount of information of ACKZNACK information is transmitted using symbols included in the T part.
- the ACKZNACK information is distributed and mapped to a plurality of blocks # 2 to # 4 as shown in FIG. As a result, the ACKZNACK information can be mapped only to the part that is the source of GI in each block subsequent to the first block. By mapping ACK / NACK information in this way, diversity gain can also be obtained for ACK / NACK information.
- the amount of CQI information exceeds the amount of information that can be transmitted with the symbols included in the T portion.
- map CQI as shown below in one block!
- the T portion is preferentially given from the higher-order bits among the plurality of bits constituting the CQI.
- CQI that shows higher quality is more likely to be used for scheduling, so it is also a force that requires better error rate characteristics.
- the TFCI is mapped beyond the T portion from the rear end of block # 1, as shown in Fig. 14. In other words, TFCI is transmitted in only one block
- the amount of information of ACKZNACK information is transmitted using symbols included in the T part.
- the amount of TFCI information exceeds the amount of information that can be transmitted with the symbols included in the T part.
- information indicating the modulation method in TFCI is preferentially mapped to the T part.
- T If there is an error in the information indicating the modulation method in the FCI, all data in the subframe demodulated using that information will be incorrect, so the information indicating the modulation method in the TFCI has a particularly good error rate. This is because characteristics are required.
- the block length and GI length (T) are constant.
- Figure 15 shows an example of changing the transmission bandwidth between 5MHz, 10MHz, and 20MHz. As can be seen from Figure 15, the number of symbols included in the T part per block is 20 MHz when the transmission bandwidth is 20 MHz.
- the control information can be transmitted with a smaller number of blocks as the transmission bandwidth increases. Therefore, in method H, as described above, the number of blocks to which control information is mapped is changed according to the transmission bandwidth. Specifically, when the transmission bandwidth is 5 MHz, the T part of eight blocks # 1 to # 8
- the control information is transmitted using only the T portion of the four blocks # 1 to # 4, and the transmission bandwidth is 20 MHz.
- Method H only the T part is used in the order of the leading block force in the subframe.
- control information can be transmitted efficiently according to changes in the transmission bandwidth.
- FIG. 16 is a block diagram showing a configuration of receiving apparatus 300 according to Embodiment 4 of the present invention.
- the same reference numerals as those in FIG. 3 are given to portions common to FIG. 3, and detailed description thereof will be omitted.
- 16 differs from FIG. 3 in that a demodulation unit 303 is added, a GI extraction unit 107 is changed to a GI extraction unit 301, a data separation unit 111 is changed to a data separation unit 302, and a maximum delay time detection unit. 105 and the extracted GI length determination unit 106 are deleted.
- the GI extraction unit 301 acquires T indicating the GI length of the received data, and acquires the acquired T and the direct wave. Based on the timing output from the timing detection unit 103, all of the direct wave power GI of the signal output from the reception RF unit 102 (all up to the rear end of the GI head force) is extracted. The extracted GI is output to the data position adjustment unit 108.
- Data separation section 302 separates the signal output from frequency axis equalization processing section 110 at a position back by T and a position back by 2T from the rear end of the data section. Extract GI
- the portion including the head of the data portion that has not been combined is output to the demodulator 112, and the portion including the rear end of the data portion combined with the extracted GI is output to the demodulator 113, and the data portion rear end force T
- the portion corresponding to the position back by 2T and the position back by 2T is output to the demodulator 303.
- Demodulation section 303 demodulates the data output from data separation section 302 and outputs data C.
- the received wave signal synthesized from the direct wave component, the delayed wave component, and the noise component in the receiving device is used to generate the data portion length T from the head of the data portion of the direct wave.
- the GI extraction unit 301 extracts a direct wave GI.
- This extracted GI includes direct wave GI, part of delayed wave GI (T — ⁇ max), and interference of previous symbol (T — ⁇ max).
- the data position adjustment unit 108 adjusts the data position of the extraction GI so that the trailing edge of the extraction GI matches the trailing edge of the extracted data part, and the extracted GI and the data part are adjusted. Are synthesized by the synthesis unit 109.
- the synthesized signal synthesized in this way synthesizes all of the GI energy of the direct wave
- the SNR is improved in the portion where the extracted GI is synthesized.
- the SINR deteriorates because the part immediately before the part where the extracted GI is combined contains the interference of the previous symbol.
- looking at the average SINR for the entire data section leading force to the rear end it will definitely improve, and the error rate characteristics can be improved.
- FIG. 18 is a block diagram showing a configuration of transmitting apparatus 400 according to Embodiment 4 of the present invention.
- the same reference numerals as those in FIG. 6 are given to portions common to FIG. 6, and detailed description thereof will be omitted.
- 18 differs from FIG. 6 in that a modulation unit 401 is added and data
- the mapping determination unit 204 is changed to the data mapping determination unit 402, and the reception RF unit 202 and the ⁇ max information acquisition unit 203 are deleted.
- Modulation section 401 modulates input data C using a modulation scheme such as PSK modulation or QAM modulation, and outputs the modulated signal to data mapping section 207.
- a modulation scheme such as PSK modulation or QAM modulation
- Data mapping determining section 402 determines a data mapping method and notifies data mapping section 207 of the determined data mapping method.
- the data mapping method notified to the data mapping unit 207 will be described with reference to FIG. According to this data mapping method, the portion corresponding to T from the rear end of the data portion, as shown in FIG.
- Unimportant ⁇ (non-important) information such as parity bits and repeated bits is mapped to the part corresponding to the position backward, that is, the part where the error rate characteristics deteriorate. According to this method, important information can be accurately transmitted to the receiving apparatus, and the unimportant information can be mapped to a portion where quality deteriorates, so that the transmission format can be used effectively.
- transmitting apparatus 400 uses data A input to modulation section 205 as important information, data C input to modulation section 401 as non-critical information, and data B input to modulation section 206 as the information.
- the data mapping unit 207 maps data A to the portion corresponding to T from the rear end of the data portion, and data C from the rear end of the data portion T
- the data mapping determination unit 402 may use a method as shown in FIG. 20 in addition to the data mapping method described above. This method discriminates the importance of data and maps partial force data with good error rate characteristics in descending order of importance. According to this method, highly important information can be reliably transmitted to the receiving device.
- the GI of the direct wave included in the received signal is extracted, and the extracted GI part is combined with the rear end part of the data part to perform the power frequency axis equalization process.
- Embodiments 1 to 4 described above the case where a predetermined part of the rear part of the data part is added as the GI to the head of the data part has been described, but in the fifth embodiment of the present invention, the front part of the data part is A case where a predetermined part of the data part is added to the rear end of the data part as GI will be described.
- the configuration of the receiving apparatus according to Embodiment 5 of the present invention is the same as that of FIG. 3 shown in Embodiment 1, and will be described with the aid of FIG.
- FIG. 21 schematically shows reception processing in the present embodiment.
- the data extraction unit 104 extracts the data portion length T from the head of the data portion of the direct wave for the received signal in which the direct wave component, the delayed wave component, and the noise component in the receiving device are combined.
- the GI extraction unit 107 calculates the GI part that is traced back (T- ⁇ max) from the GI rear end of the direct wave
- Extract In other words, the GI of the part that is not affected by the interference of temporally adjacent data is extracted.
- the data position adjustment unit 108 adjusts the data position of the extraction GI so that the beginning of the extraction GI matches the beginning of the extracted data part, and synthesizes the extraction GI and the data part with the adjusted data position. Synthesized in part 109.
- method E corresponds to method A shown in FIG. 8, and the portion corresponding to (T ⁇ max) from the beginning of the data portion, that is, the error rate.
- Method F corresponds to Method B shown in Fig. 9, and maps important information from the beginning of the data portion to the portion corresponding to the GI length (T). is there.
- method G corresponds to method C shown in Fig. 10. In the portion corresponding to the GI length (T) from the beginning of the data portion, method G In descending order
- method H corresponds to method D shown in Fig. 11.
- the method H is used to determine the importance of the data, and in order of increasing importance, the data head force in the entire data portion. It is something to be mapped.
- Embodiment 5 even when a predetermined part of the front part of the data part is added to the rear end of the data part as GI, demodulation is performed by effectively using the energy of GI. Therefore, it is possible to improve the SNR of the combined portion, and thus reduce errors in the combined portion. In addition, since important information can be accurately transmitted to the receiving apparatus, the throughput of the entire system can be improved.
- the power of the present invention is explained for synthesizing a part of the GI with the data part.
- form 6 when a predetermined part of the front part of the data part is added as the GI to the rear end of the data part, the entire GI (all the part from the first GI to the rear end) and the data part are combined.
- Data mapping methods I and J are explained below.
- the configuration of the transmission apparatus according to Embodiment 6 of the present invention is the same as that of FIG. 18 shown in Embodiment 4, and therefore detailed description thereof is omitted.
- Method I corresponds to the method shown in Fig. 19 as shown in Fig. 26, in which important information is mapped from the head of the data part to the part corresponding to T, and the data part head force T
- Method 3 ⁇ 4 corresponds to the method shown in FIG. 20, and determines the importance of data, and in order of importance, partial force with good error rate characteristics. It is for mapping data.
- normal information in the above embodiments includes, for example, data channel information such as HS-DSCH, DSCH, DPDCHPDDCH, S-CCPCH, and FACH in the 3GPP standard.
- HS-SCCH which is an associated channel with HS-DSCH, HS-DPCCH, RRM (Radio Resource Management)
- control channels such as DCCH, S—CCPCH, P—CCPCH, PCH, and DPCCH for control of the BCH physical channel for reporting control information.
- TFCI important information in each of the above embodiments is TFCI. Since TFCI is information for notifying the data format, if TFCI is received by mistake, all data of the frame or subframe will be received by mistake. Therefore, in each of the above embodiments, it is effective to improve TFCI error rate characteristics by treating TFCI as important information.
- the common control channel is treated as important information in each of the above embodiments !, and the individual control channel is used in each of the above embodiments. Treat it as normal information. This is because the common control channel is transmitted in common to a plurality of mobile stations, and therefore better error rate characteristics are required compared to the individual control channel transmitted individually to each mobile station.
- important information in each of the above embodiments includes initial information (Initialization Vector) used for information compression and data encryption.
- Initial information is the basis of subsequent communications, and if received in error, the subsequent series of communications may be disabled. Therefore, it is effective to improve the error rate characteristics of the initial information by treating the initial information as important information in each of the above embodiments.
- the data of the central channel of the audio multiplexed signal may be handled as important information in each of the above embodiments. This is because if the data of the center channel is mistaken in the audio multiplex signal, the influence of deterioration on the sense of hearing is greater than the mistake of the data of other channels (left and right channels and rear channels).
- the present invention is configured by nodeware has been described as an example, but the present invention can also be realized by software.
- each functional block used in the description of each of the above embodiments is typically realized as an LSI that is an integrated circuit. These may be individually made into one chip, or may be made into one chip so as to include a part or all of them.
- LSI power integration
- IC system LSI
- super LSI super LSI
- ultra LSI ultra LSI
- circuit integration is not limited to LSI's, and implementation using dedicated circuitry or general purpose processors is also possible.
- An FPGA Field Programmable Gate Array
- reconfigurable 'processor that can reconfigure the connection and settings of circuit cells inside the LSI may be used.
- the radio reception apparatus and radio transmission apparatus according to the present invention can improve the reception quality by effectively using GI and improve the reception quality, or the base station apparatus used in the frequency equalization single carrier transmission system or It can be applied to a mobile station device or the like.
Abstract
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Priority Applications (4)
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EP07738589A EP1986342A1 (en) | 2006-03-15 | 2007-03-14 | Wireless transmitting device and wireless transmitting method |
MX2008011601A MX2008011601A (es) | 2006-03-15 | 2007-03-14 | Dispositivo de transmision inalambrica y metodo de transmision inalambrica. |
US12/282,791 US20090137230A1 (en) | 2006-03-15 | 2007-03-14 | Radio transmitting apparatus and radio transmitting method |
JP2008505189A JPWO2007105765A1 (ja) | 2006-03-15 | 2007-03-14 | 無線送信装置及び無線送信方法 |
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JP2006-070963 | 2006-03-15 | ||
JP2006070963 | 2006-03-15 |
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WO2007105765A1 true WO2007105765A1 (ja) | 2007-09-20 |
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PCT/JP2007/055119 WO2007105765A1 (ja) | 2006-03-15 | 2007-03-14 | 無線送信装置及び無線送信方法 |
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EP (1) | EP1986342A1 (ja) |
JP (1) | JPWO2007105765A1 (ja) |
KR (1) | KR20080114730A (ja) |
CN (1) | CN101401323A (ja) |
MX (1) | MX2008011601A (ja) |
RU (1) | RU2417521C2 (ja) |
WO (1) | WO2007105765A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2075948A3 (en) * | 2007-12-28 | 2014-05-21 | Fujitsu Limited | Multiplexing of control signals |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7917166B2 (en) * | 2006-06-16 | 2011-03-29 | Samsung Electronics Co., Ltd. | System and method for controlling power in a communication system |
KR100978787B1 (ko) * | 2006-06-16 | 2010-08-30 | 삼성전자주식회사 | 통신 시스템에서의 전력 제어 방법 및 장치 |
WO2008127183A2 (en) * | 2007-04-11 | 2008-10-23 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus in a telecommunication system |
JP2010074398A (ja) * | 2008-09-17 | 2010-04-02 | Ntt Docomo Inc | Ofdm変復調方法、ofdm変調装置、ofdm復調装置およびofdm変復調システム |
US10342012B2 (en) * | 2015-03-15 | 2019-07-02 | Qualcomm Incorporated | Self-contained time division duplex (TDD) subframe structure |
US10075970B2 (en) | 2015-03-15 | 2018-09-11 | Qualcomm Incorporated | Mission critical data support in self-contained time division duplex (TDD) subframe structure |
US9936519B2 (en) | 2015-03-15 | 2018-04-03 | Qualcomm Incorporated | Self-contained time division duplex (TDD) subframe structure for wireless communications |
US9814058B2 (en) | 2015-05-15 | 2017-11-07 | Qualcomm Incorporated | Scaled symbols for a self-contained time division duplex (TDD) subframe structure |
US9992790B2 (en) | 2015-07-20 | 2018-06-05 | Qualcomm Incorporated | Time division duplex (TDD) subframe structure supporting single and multiple interlace modes |
CN108432283A (zh) * | 2015-12-25 | 2018-08-21 | 三菱电机株式会社 | 无线基站和通信系统 |
WO2019157636A1 (zh) * | 2018-02-13 | 2019-08-22 | 华为技术有限公司 | 一种循环前缀长度确定方法及装置 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004349889A (ja) | 2003-05-20 | 2004-12-09 | Intelligent Cosmos Research Institute | 送信装置および通信システム |
JP2004538715A (ja) * | 2001-08-10 | 2004-12-24 | インターディジタル テクノロジー コーポレイション | 時分割複信方式(tdd)のための動的リンクアダプテーション |
JP2005518148A (ja) * | 2002-02-15 | 2005-06-16 | シーメンス アクチエンゲゼルシヤフト | データ転送方法 |
JP2006070963A (ja) | 2004-09-01 | 2006-03-16 | Nidec-Shimpo Corp | 遊星歯車減速機 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6643275B1 (en) * | 1998-05-15 | 2003-11-04 | Telefonaktiebolaget Lm Ericsson (Publ) | Random access in a mobile telecommunications system |
US6985457B2 (en) * | 2001-08-10 | 2006-01-10 | Interdigital Technology Corp. | Dynamic link adaption for time division duplex (TDD) |
JP2004356837A (ja) * | 2003-05-28 | 2004-12-16 | Fujitsu Ltd | ランダムアクセス受信方法及び受信装置 |
KR20050081566A (ko) * | 2004-02-14 | 2005-08-19 | 삼성전자주식회사 | 고속 순방향 패킷 데이터를 전송하는 이동통신시스템에서압축 모드에 따른 복합 재전송을 수행하는 방법 |
US20060056421A1 (en) * | 2004-09-10 | 2006-03-16 | Interdigital Technology Corporation | Reducing latency when transmitting acknowledgements in mesh networks |
US7480498B2 (en) * | 2004-09-27 | 2009-01-20 | Cisco Technology, Inc. | Receiver gain control using a pilot signal |
-
2007
- 2007-03-14 CN CNA2007800086091A patent/CN101401323A/zh active Pending
- 2007-03-14 MX MX2008011601A patent/MX2008011601A/es active IP Right Grant
- 2007-03-14 US US12/282,791 patent/US20090137230A1/en not_active Abandoned
- 2007-03-14 WO PCT/JP2007/055119 patent/WO2007105765A1/ja active Application Filing
- 2007-03-14 JP JP2008505189A patent/JPWO2007105765A1/ja not_active Ceased
- 2007-03-14 EP EP07738589A patent/EP1986342A1/en not_active Withdrawn
- 2007-03-14 KR KR1020087022261A patent/KR20080114730A/ko not_active Application Discontinuation
- 2007-03-14 RU RU2008136836/09A patent/RU2417521C2/ru not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004538715A (ja) * | 2001-08-10 | 2004-12-24 | インターディジタル テクノロジー コーポレイション | 時分割複信方式(tdd)のための動的リンクアダプテーション |
JP2005518148A (ja) * | 2002-02-15 | 2005-06-16 | シーメンス アクチエンゲゼルシヤフト | データ転送方法 |
JP2004349889A (ja) | 2003-05-20 | 2004-12-09 | Intelligent Cosmos Research Institute | 送信装置および通信システム |
JP2006070963A (ja) | 2004-09-01 | 2006-03-16 | Nidec-Shimpo Corp | 遊星歯車減速機 |
Non-Patent Citations (1)
Title |
---|
FALCONER D. ET AL.: "Frequency domain equalization for single-carrier broadband wireless systems", IEEE COMMUNICATIONS MAGAZINE, vol. 40, no. 4, April 2002 (2002-04-01), pages 58 - 66, XP011092809 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2075948A3 (en) * | 2007-12-28 | 2014-05-21 | Fujitsu Limited | Multiplexing of control signals |
US9497735B2 (en) | 2007-12-28 | 2016-11-15 | Fujitsu Limited | Method of signal multiplexing and transmitter in radio communication system |
Also Published As
Publication number | Publication date |
---|---|
KR20080114730A (ko) | 2008-12-31 |
EP1986342A1 (en) | 2008-10-29 |
CN101401323A (zh) | 2009-04-01 |
US20090137230A1 (en) | 2009-05-28 |
RU2417521C2 (ru) | 2011-04-27 |
MX2008011601A (es) | 2008-09-22 |
JPWO2007105765A1 (ja) | 2009-07-30 |
RU2008136836A (ru) | 2010-03-20 |
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