WO2004042940A1 - 送信装置及び自動利得制御方法 - Google Patents
送信装置及び自動利得制御方法 Download PDFInfo
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- WO2004042940A1 WO2004042940A1 PCT/JP2003/014095 JP0314095W WO2004042940A1 WO 2004042940 A1 WO2004042940 A1 WO 2004042940A1 JP 0314095 W JP0314095 W JP 0314095W WO 2004042940 A1 WO2004042940 A1 WO 2004042940A1
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- WIPO (PCT)
- Prior art keywords
- preamble
- automatic gain
- gain control
- transmission
- preambles
- Prior art date
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission
- H04W52/283—Power depending on the position of the mobile
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
- H04W52/50—TPC being performed in particular situations at the moment of starting communication in a multiple access environment
Definitions
- the present invention relates to a transmission device and an automatic gain control method, and more particularly to a transmission device and an automatic gain control method for transmitting a transmission signal including a preamble for automatic gain control.
- the user does not always transmit and receive signals at the same reception level, and signals to different levels, such as a short distance or a long distance from the transmitting antenna, are provided to the user. Has been received. Therefore, keeping the level of the received signal within the dynamic range of the analog digital Z-converter is an essential technology for wireless communication systems.
- this operation is performed by an automatic gain control (hereinafter referred to as “AGC”) circuit.
- AGC automatic gain control
- a preamble signal for AGC is transmitted before the signal such as the start symbol at the beginning of the packet, and the AGC circuit adjusts the reception level of this preamble signal.
- the amplification gain is controlled based on the amplification gain.
- the AGC preamble signal is input into a transmission signal together with data and transmitted.
- the AGC error is an error between the target value of the reception level after AGC and the actual reception level.
- the conventional transmission device and gain control method if the AGC preamble cannot be set properly, such as when the line quality is poor, the AGC pull-in characteristics deteriorate and the signal is clipped or There is a problem in that the reception level decreases and the quantization error increases, making it difficult to demodulate the received signal without error.
- the preamble for AGC is the data sent to the communication partner. Since it is not the evening, there is a problem that the transmission efficiency of the overnight is reduced by inserting the preamble for AGC. Disclosure of the invention
- An object of the present invention is to provide a transmission device and an automatic gain control method capable of achieving both transmission efficiency and error rate characteristics.
- the purpose of this is to compare the transmission time interval for transmitting the transmission signal to the communication partner with the threshold value, and if the transmission time interval is longer than the threshold value, increase the number of AGC preambles more than usual, and If the interval is less than the threshold, this can be achieved by making the number of AGC preambles a normal number and adaptively changing the number of AGC preambles according to the transmission time interval.
- FIG. 1 is a block diagram illustrating a configuration of a transmitting apparatus according to Embodiment 1 of the present invention
- FIG. 2 is a block diagram illustrating a configuration of a receiving apparatus according to Embodiment 1 of the present invention
- FIG. FIG. 4 is a flowchart showing the operation of the transmitting apparatus according to Embodiment 1 of the present invention.
- FIG. 4 is a diagram showing a frame format when the number of AGC preambles is 5.
- FIG. 5 is a diagram showing a frame when the number of AGC preambles is 10. Diagram showing the format,
- FIG. 6 is a block diagram illustrating a configuration of a transmitting apparatus according to Embodiment 2 of the present invention
- FIG. 7 is a block diagram illustrating a configuration of a transmitting apparatus according to Embodiment 3 of the present invention
- FIG. FIG. 9 is a block diagram illustrating a configuration of a receiving apparatus according to Embodiment 3 of the present invention
- FIG. 9 is a block diagram illustrating a configuration of a transmitting apparatus according to Embodiment 4 of the present invention
- FIG. 10 is a block diagram of Embodiment 5 of the present invention.
- FIG. 11 is a block diagram showing a configuration of a mobile device to which the transmitting apparatus according to Embodiment 5 of the present invention is applied
- FIG. 12 is a diagram showing a frame format.
- FIG. 1 is a diagram illustrating a configuration of a transmission device 100 according to Embodiment 1 of the present invention
- FIG. 2 is a diagram illustrating a configuration of a reception device 200 according to Embodiment 1 of the present invention.
- the transmission device 100 includes a transmission control unit 101, an encoding unit 102, a modulation unit 103, a preamble input unit 104, a transmission unit 105, an antenna 106, and a counter unit 1. 07, a delay unit 108, a subtraction unit 109, and a preamble number control unit 110.
- the receiving device 200 includes an antenna 201, a receiving unit 202, a synchronizing unit 203, a demodulating unit 204, a decoding unit 205, a receiving control unit 206, and an AGC unit 207. It is mainly composed of
- the transmission control unit 101 temporarily stores the transmission signal and outputs it to the encoding unit 102 at the time when the transmission timing comes.
- the transmission control unit 101 determines the transmission timing, generates a transmission timing signal, and outputs the generated transmission timing signal to the power supply unit 107. Transmission is performed once per frame.
- Encoding section 102 encodes the transmission signal input from transmission control section 101 and outputs the result to modulating section 103.
- Modulating section 103 modulates the transmission signal input from encoding section 102 and outputs the modulated signal to preamble insertion section 104.
- the modulator 103 performs signal mapping such as QPSK or 16 QAM on the transmission signal, and then performs an inverse fast Fourier transform (IFFT). ) Process to perform orthogonal frequency division multiplexing.
- IFFT inverse fast Fourier transform
- the modulation section 103 applies QPSK or Perform signal mapping such as 16 QAM, and then perform spreading processing.
- the preamble insertion unit 104 inserts various preambles such as the number of AGC briambles and the preamble for propagation path estimation into the transmission signal input from the modulation unit 103 and outputs it to the transmission unit 105.
- the preamble insertion unit 104 includes the number of AGC preambles determined by the preamble number control unit 110 in the transmission signal, and outputs the transmission signal to the transmission unit 105.
- Transmitting section 105 converts the frequency of the transmission signal input from preamble input section 104 from a baseband frequency to a radio frequency, and transmits the signal from antenna 106.
- the counting unit 107 generates information indicating the transmission timing based on the transmission timing input from the transmission control unit 101 as the transmission interval measuring means, and outputs the delay unit 108 and the subtraction unit 109 Output to
- the delay unit 108 delays the information indicating the transmission timing input from the count unit 107 and outputs the information to the subtraction unit 109.
- the subtraction unit 109 determines, based on the information indicating the transmission timing input from the counter unit 107 and the information indicating the transmission timing input from the delay unit 108, the transmission timing transmitted last time and the transmission timing transmitted this time. A difference (hereinafter referred to as “transmission timing difference”) is calculated, and the calculated transmission timing difference is output to the preamble number control unit 110 as a transmission time interval.
- the preamble number control unit 110 compares the threshold value with the transmission timing difference input from the subtraction unit 109, and adaptively determines the number of AGC preambles according to the comparison result with the threshold value.
- the preamble insertion unit 104 is instructed to include the determined number of AGC preambles in the transmission signal.
- the transmission time interval may be longer than the threshold value, such as when the transmission time interval is long during transmission, when transmission is performed first, or when transmission is interrupted but transmission is temporarily interrupted and restarted. Can be considered. Therefore, the number of AGC preambles for the first transmission can be larger than the number of AGC preambles for the second and subsequent transmissions. In addition, transmission has been suspended for a long time. The number of AGC preambles at the time of resumption when transmission is restarted can be made larger than the number of AGC preambles at the time of the second or subsequent transmission after resumption.
- the preamble number control unit 110 increases the number of AGC preambles for a predetermined time after transmission by increasing the number of AGC preambles when the transmission time interval is equal to or longer than the threshold value. It is also possible. The method of setting the number of preambles for AGC will be described later.
- Receiving section 202 converts the frequency of the received signal received by antenna 201 from radio frequency to base span frequency, and outputs the converted signal to synchronization section 203 and AGC section 207.
- the synchronization section 203 detects the reception timing from the reception signal input from the reception section 202, and outputs the detected reception timing to the demodulation section 204.
- Demodulation section 204 demodulates the received signal input from synchronization section 203 and outputs it to decoding section 205.
- Decoding section 205 decodes the received signal input from demodulation section 204 and outputs it to reception control section 206.
- Reception control section 206 temporarily accumulates the received signal input from decoding section 205, detects whether or not there is an error, and outputs when there is no error.
- the 80 ⁇ unit 207 generates an AGC control signal from the received signal input from the receiving unit 2 ⁇ 2, and outputs the generated AGC control signal to the receiving unit 202. That is, the AGC unit 207 performs control between the base station apparatus and the wireless communication apparatus such as the communication terminal apparatus so that the reception level is constant even if the communication distance changes. Further, the AGC unit 207 obtains the reception level, and outputs the obtained reception level as reception level information.
- the reception level information is, for example, RSSI (Received Signal Strength Indicator).
- the reception level information is not limited to the RSSI, and may be other than the RSSI.
- each of P1 to P10 is an AGC preamble
- D1 to D3 are transmission data.
- the transmitting apparatus 100 0 counts the transmission timing in the counter section 107, calculates the transmission timing difference in the subtraction section 109, and sets the transmission time interval in the preamble number control section 110. Compare with the threshold value (step (hereinafter referred to as “ST”) ST301). If the transmission time interval is less than the threshold, decide to insert 5 AGC preambles, and insert 5 AGC preambles in the preamble insertion section 104 as shown in Fig. 4. (ST302).
- the transmission time interval is equal to or longer than the threshold value in ST 301, it is determined that 10 AGC preambles are to be inserted, and as shown in FIG. Insert 10 AGC preambles (ST303).
- the transmission signal is frequency-converted from a baseband frequency to a radio frequency in transmitting section 105 and transmitted from antenna 106 (ST 304).
- the number of AGC preambles is adaptively changed according to the transmission timing difference, so that the number of AGC preambles increases when the transmission time interval is long.
- the transmission time interval is short, the number of AGC preambles is reduced and transmission efficiency is prioritized, so that the pull-in characteristics due to automatic gain control can be prevented from deteriorating. It is possible to achieve compatibility with error rate characteristics.
- FIG. 6 is a diagram showing a configuration of transmitting apparatus 600 according to Embodiment 2 of the present invention.
- the present embodiment is characterized in that the number of AGC preambles is changed according to the reception level.
- FIG. 6 differs from FIG. 1 in the configuration in which the selection unit 600 is provided. Parts having the same configuration as in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.
- the receiving apparatus according to the present embodiment has the same configuration as that of FIG.
- the selector 601 calculates the difference between the received level information and the initial value of the AGC gain based on the received level information and the initial value of the AGC gain input from the AGC unit 207 as the received level measuring means.
- the calculated difference is compared with a threshold value (not shown) to determine the number of AGC preambles according to the comparison result. That is, when the difference between the reception level information and the initial value of the AGC gain is less than the threshold value, the time required for AGC convergence is short, and thus the selection unit 6001 sets the threshold value (the threshold value). > Threshold ⁇ ) to reduce the number of AGC preambles, and if the difference between the received level information and the initial value of the AGC gain is greater than or equal to the threshold, the time required for AGC convergence becomes longer Therefore, the selection section 601 selects the threshold? To increase the number of AGC preambles.
- the operation of transmitting apparatus 600 is the same as that of FIG. 3 except that the threshold used in preamble number control section 110 is selected based on the reception level information and the initial value for AGC. Is omitted.
- the transmitting apparatus and the automatic gain control method of the present embodiment in addition to the effect of the first embodiment, in addition to the transmission time interval, the difference between the reception level information and the initial value of the AGC gain is obtained.
- the number of AGC preambles is set by estimating the time required for AGC pull-in according to the AGC, so the number of AGC preambles can be set more finely according to the line conditions with the communication partner, etc. It is possible to achieve compatibility with the error rate characteristics.
- FIG. 7 is a diagram illustrating a configuration of a transmitting device 700 according to Embodiment 3 of the present invention
- FIG. 8 is a diagram illustrating a configuration of receiving device 800 according to Embodiment 3 of the present invention. is there.
- the feature of this embodiment is that the number of AGC preambles is changed in consideration of whether the distance to the communication partner is farther or closer than the previous transmission by using the history of reception level information. It is assumed that.
- the configuration in which the selection unit 701 is provided is different from that in FIG. 1, and in FIG. 8, the selection unit 801, the memory 802, the memory 803, and the large
- the configuration in which the small comparison section 804 is provided is different from FIG.
- the same as Fig. 1 and Fig. 2 Portions having one configuration are denoted by the same reference numerals, and description thereof is omitted.
- the selection unit 701 determines a threshold value of one threshold /? (Threshold> threshold) according to the information as to whether the communication partner input from the size comparison unit 804 described later is moving away or approaching. Value /?), And outputs the selected threshold information to the preamble number control unit 110.
- a threshold value of one threshold /? (Threshold> threshold) according to the information as to whether the communication partner input from the size comparison unit 804 described later is moving away or approaching. Value /?)
- the selection unit 701 determines a threshold value of one threshold /? (Threshold> threshold) according to the information as to whether the communication partner input from the size comparison unit 804 described later is moving away or approaching. Value /?), And outputs the selected threshold information to the preamble number control unit 110.
- the AGC gain is increased.
- the AGC gain is reduced. The change is faster at higher AGC than at lower AGC. Therefore, the selection unit
- the threshold value or the threshold value /? May be selected based on the rate of change of R SSI.
- the selection unit 801 alternately outputs the reception level information input from the AGC unit 207 to the memory 802 and the memory 803.
- the memory 802 stores the reception level information input from the selection unit 801 and outputs it to the magnitude comparison unit 804. The timing of output to the size comparison section 804 is determined by the memory
- the memory 803 stores the reception level information input from the selection unit 801 and outputs it to the magnitude comparison unit 804.
- the timing of outputting to the magnitude comparing section 804 is when the reception level information is stored in both the memory 802 and the memory 803.
- the magnitude comparison unit 804 compares the reception level information input from the memory 802 and the memory 803 with each other, and determines whether the change in the reception level information increases or decreases. Is detected, and the detection result is output to the selector 701.
- the operation of transmitting apparatus 700 is the same as that of FIG. 3 except that the threshold value used in preamble number control section 110 is made variable, and a description thereof will be omitted.
- the other part, which selects the threshold value using the reception level information in the selection unit 70 1 selection may be made by performing exterior interpolation using past reception level information. In this case, an appropriate number of AGC preambles can be set each time when the communication partner's moving speed is high and the line state fluctuates greatly.
- the transmitting apparatus and the automatic gain control method of the present embodiment in addition to the effects of Embodiment 1, in addition to the transmission time interval, it is also considered whether the terminal is farther or closer. Since the number of AGC preambles is changed, the number of AGC preambles can be set more finely according to the line conditions with the communication partner, etc., and further improvement in transmission efficiency and error rate characteristics can be achieved. it can. In addition, since the number of AGC preamplifiers is calculated from the history of reception levels, it is necessary to urgently increase the number of AGC preambles even if the value temporarily differs due to temporary deterioration of the communication environment. When there are no AGCs, it is possible to prevent the transmission efficiency from being reduced by increasing the number of AGC preambles.
- the threshold value selected by the selection unit 70 1 is two thresholds, ie, one threshold value.
- the threshold value selected by the selection unit 70 1 is a threshold value.
- the threshold value is not limited to two, and may be selected from an arbitrary number of threshold values.
- the reception levels are stored in the past two memories 802 and 803 to determine whether the communication partner is moving away or approaching. This is not limited to the case where it is determined whether the communication partner is moving away or approaching by storing the information in the memory of the memory devices 80 2 and 80 3. You may make it determine whether it is approaching. In this case, three or more memories may be used.
- the size comparison unit 804 can determine whether the communication partner is moving at high speed or low speed, the AGC preamble is used when the communication partner is moving at high speed. It is also possible to fix with a large number.
- the reception level information The threshold value or the threshold /? was selected by judging whether the communication partner was far away or approaching by subtracting the information, but the communication partner was far away by subtracting the reception level information. This is not limited to the case where threshold value or threshold value /? Is selected by judging whether or not the threshold value is approaching, but the reception level information is averaged, and the threshold value is determined using the averaged reception level information. Alternatively, threshold /? May be selected.
- FIG. 9 is a diagram showing a configuration of transmitting apparatus 900 according to Embodiment 4 of the present invention.
- This embodiment is characterized in that one threshold? Is selected based on threshold setting information such as channel quality information input from the transmission control unit to the selection unit.
- FIG. 9 is different from FIG. 1 in the configuration in which a selecting unit 901 is provided. Parts having the same configuration as in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. Further, the receiving apparatus has the same configuration as that of FIG.
- the transmission control unit 101 once holds threshold setting information for selecting one threshold value input from a receiving unit (not shown) or threshold setting information notified from a communication partner, and The threshold setting information is output to the selector 901 at the timing of transmitting the transmission timing information.
- the transmission control unit 101 receives threshold setting information from the mobile station and holds the threshold setting information notified. You.
- the transmission control unit 101 holds the threshold setting information detected at the time of reception. The type of the threshold setting information will be described later.
- the selection unit 901 selects either one of the thresholds and the threshold based on the threshold setting information input from the transmission control unit 101, and presses the selected threshold. Output to the number of reamble control section 110.
- the first threshold setting information is line quality. That is, when the line quality information with poor line quality is input from the transmission control unit 101, the selection unit 901 selects the threshold?, And the line quality information with good line quality is transmitted to the transmission control unit 1. 0 If input from 1, select threshold value. As a result, if the line quality deteriorates, the number of AGC preambles is increased even if the transmission time interval of the transmission signal is slightly shorter, so that even if the line quality deteriorates, it is possible to prevent the error rate characteristics from deteriorating. .
- the second threshold setting information is the multipath delay time. That is, when information indicating that the multipath delay time is large is input from the transmission control unit 101, the selection unit 91 selects the threshold ⁇ , and the multipath delay time is small. When the information indicating that is input from the transmission control unit 101, the threshold value is selected. As a result, when the delay time of the multipath is large, the number of AGC preambles is increased even if the transmission time interval of the transmission signal is slightly short, so that the error rate characteristics are prevented from deteriorating even if the delay time is long. ,be able to.
- the third threshold setting information is the moving speed of the terminal. That is, the selection unit 9101 selects the threshold? When terminal information with a high moving speed is input from the transmission control unit 101, and selects terminal information with a low moving speed from the transmission control unit 101. If entered, select threshold. As a result, when the moving speed of the terminal increases, the number of AGC preambles increases even if the transmission time interval of the transmission signal is slightly shorter. Deterioration can be prevented.
- the fourth information for setting a threshold value is a band use status. That is, when the band information indicating that there is room in the band is input from the transmission control unit 101, the selection unit 91 selects a threshold value, and the band information with a small remaining band is transmitted to the transmission control unit 101. When inputting from, select the threshold value. Whether there is enough bandwidth or the remaining bandwidth is low depends on whether the ratio of the bandwidth used for communication with the current communication partner to the maximum allowable bandwidth is equal to or greater than the threshold. You can The determination may be made by another method. As a result, the number of AGC preambles is increased when there is enough available bandwidth, so that the error rate characteristics can be further improved without sacrificing transmission efficiency. Note that the operation of transmitting apparatus 900 is the same as that of FIG. 3 except that the threshold value is variable, and a description thereof will be omitted.
- the AGC takes into account various threshold setting information in addition to the transmission time interval. Since the number of preambles for AGC is changed, the number of preambles for AGC can be set more finely according to the line conditions with the communication partner, and it is possible to achieve both higher transmission efficiency and higher error rate characteristics.
- FIG. 10 is a diagram showing a configuration of a base station apparatus 100 to which the transmitting apparatus according to Embodiment 5 of the present invention is applied, and FIG. 11 is a communication terminal according to Embodiment 5 of the present invention.
- FIG. 1 is a diagram showing a configuration of a mobile device 110 which is a device. The present embodiment is characterized in that the number of AGC preambles in a mobile station set in the base station apparatus is reported from the base station apparatus to the mobile station.
- FIG. 10 differs from FIG. 1 in the configuration in which a preamble information insertion unit 1001 is provided. Parts having the same configuration as in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.
- the receiving device has the same configuration as that of FIG.
- the base station apparatus 1000 performs centralized control of a plurality of mobile stations 110, and knows which mobile station performs transmission. Therefore, the base station apparatus 100 can know the transmission interval of each mobile station 110.
- the preamble number control unit 110 compares the threshold value with the transmission timing difference input from the subtraction unit 109, and adaptively determines the number of AGC preambles according to the comparison result with the threshold value.
- the mobile station 110 outputs the determined number of AGC preambles to the preamble information input unit 1001 as preamble number information in each mobile station 110.
- the preamble information insertion unit 1001 which is a notification unit, inserts the preamble number information input from the preamble number control unit 110 into the transmission signal input from the modulation unit 103 and outputs it to the transmission unit 105. I do.
- the preamble number control unit 110 in the mobile station 110 sets the number of AGC preambles set in the base station apparatus 100 from the preamble number information extracted from the received signal, and sets the set AGC.
- the preamble insertion unit 104 is instructed to insert the number of preambles for use into the transmission signal.
- a variable number of AGC preambles notified from the base station apparatus are inserted into the transmission signal, so that the AGC pull-in characteristic is degraded.
- the transmission efficiency and the error rate characteristic can both be achieved.
- the mobile station does not need to insert the AGC preamble of the number of AGC preambles notified from the base station device into the transmission signal as it is, and does not need to obtain the number of AGC preambles, so that the processing speed can be increased.
- the number of AGC preambles set in base station apparatus 100 is determined by any of the methods described in any of the above-described first to fourth embodiments. Can be selected and set.
- a method of controlling the number of AGC preambles when the transmission signal is a frame format including a random access channel will be described with reference to FIG.
- a channel in which a terminal or the like performs random transmission is called a random access channel.
- the frame format including the random access channel is used for, for example, MMAC and BRAN.
- the number of AGC preambles in such a random access channel is fixed to be increased to 10.
- Another example of fixing the number of AGC preambles in a state where the number of AGC preambles is increased is as follows.When transmitting data requiring good line quality such as retransmission data or control data, the number of AGC preambles is reduced to 10 pieces. Fix it in the increased state. Further, the transmitting apparatus described in Embodiments 1 to 5 above can be used for both the uplink and the downlink, but when the number of AGC preambles is changed in the downlink, Since some users are performing initial synchronization pull-in, such users may be degraded in initial synchronization pull-in characteristics. For this reason, it is effective to change the number of AGC preambles only for a transmitting apparatus that transmits in the uplink.
- the transmitting apparatus can change the number of AGC preambles for each communication partner.
- the number of AGC preambles is set to 10 when the number of AGC preambles is large, and the number of normal AGC preambles is set to 5.
- the number of preambles for AGC is not limited to 10, and the number of preambles for AGC is not limited to 5. If the number of preambles for AGC is large, any number other than 10 is used. May be the number. In short, the number is arbitrary as long as the number of AGC preambles when the number of AGC preambles is large is larger than the number of normal AGC preambles.
- the transmitting apparatus described in each of the above embodiments can be applied to a base station apparatus and a communication terminal apparatus.
- the transmission signal transmitted by the transmitting apparatus may be a preamble format in an OFDM communication system or a BRAN (Broadband Radio Access Networks) system, ⁇ ⁇
- the preamble format is not limited to the FDM communication system or the preamble format in the BRAN system, but may be a preamble format in any communication system other than the OFDM communication system or the BRAN system.
- the number of AGC preambles is set by comparing the transmission time interval or the reception level with the threshold, the number is not limited to the case of comparing the transmission time interval or the reception level with the threshold, but is obtained by calculation. It can be set by any method such as a method.
- the present invention is suitable for use in a transmission device for transmitting a transmission signal including a preamble for automatic gain control and an automatic gain control method.
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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EP03810598.7A EP1560339B1 (en) | 2002-11-08 | 2003-11-05 | Transmission device and automatic gain control method |
US10/516,180 US7206597B2 (en) | 2002-11-08 | 2003-11-05 | Transmission apparatus and auto gain control method |
AU2003277549A AU2003277549A1 (en) | 2002-11-08 | 2003-11-05 | Transmission device and automatic gain control method |
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JP2002325225A JP3717472B2 (ja) | 2002-11-08 | 2002-11-08 | 送信装置及び自動利得制御方法 |
JP2002-325225 | 2002-11-08 |
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WO2004042940A1 true WO2004042940A1 (ja) | 2004-05-21 |
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US (1) | US7206597B2 (ja) |
EP (1) | EP1560339B1 (ja) |
JP (1) | JP3717472B2 (ja) |
CN (1) | CN100414842C (ja) |
AU (1) | AU2003277549A1 (ja) |
WO (1) | WO2004042940A1 (ja) |
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- 2003-11-05 CN CNB2003801005233A patent/CN100414842C/zh not_active Expired - Fee Related
- 2003-11-05 EP EP03810598.7A patent/EP1560339B1/en not_active Expired - Lifetime
- 2003-11-05 WO PCT/JP2003/014095 patent/WO2004042940A1/ja active Application Filing
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Also Published As
Publication number | Publication date |
---|---|
EP1560339A1 (en) | 2005-08-03 |
JP3717472B2 (ja) | 2005-11-16 |
EP1560339A4 (en) | 2011-06-22 |
US20050227645A1 (en) | 2005-10-13 |
AU2003277549A1 (en) | 2004-06-07 |
JP2004159248A (ja) | 2004-06-03 |
EP1560339B1 (en) | 2015-10-07 |
CN100414842C (zh) | 2008-08-27 |
US7206597B2 (en) | 2007-04-17 |
CN1692559A (zh) | 2005-11-02 |
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