WO2008044307A1 - Dispositif de réception de signal radio - Google Patents

Dispositif de réception de signal radio Download PDF

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Publication number
WO2008044307A1
WO2008044307A1 PCT/JP2006/320443 JP2006320443W WO2008044307A1 WO 2008044307 A1 WO2008044307 A1 WO 2008044307A1 JP 2006320443 W JP2006320443 W JP 2006320443W WO 2008044307 A1 WO2008044307 A1 WO 2008044307A1
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WIPO (PCT)
Prior art keywords
signal
increasing function
terminals
burst
monotonically increasing
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PCT/JP2006/320443
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English (en)
Japanese (ja)
Inventor
Hitomaro Tohgoh
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Panasonic Corporation
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Priority to PCT/JP2006/320443 priority Critical patent/WO2008044307A1/fr
Priority to JP2008538543A priority patent/JPWO2008044307A1/ja
Publication of WO2008044307A1 publication Critical patent/WO2008044307A1/fr

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
    • H03G3/3078—Circuits generating control signals for digitally modulated signals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers

Definitions

  • the present invention relates to a radio signal receiving apparatus that receives burst signals from a plurality of terminals.
  • Data transmission methods in the second and third generation mobile communication systems are mainly line switching methods, but the ratio of data communications other than voice communications has increased, reducing equipment costs.
  • IP Internet-Protocol
  • IP Internet-Protocol
  • the packet exchange method is becoming mainstream for data transmission in the next generation mobile communication system.
  • the transmission bandwidth of next-generation wireless communication is increasing from several hundred kilohertz to several tens of megahertz, and frequency multiplexing technology is used for uplink signals in addition to time division multiplexing technology.
  • radio station apparatuses that receive uplink radio signals from a plurality of terminals such as base station apparatuses of mobile communication systems and access point (AP) apparatuses of wireless LANs, AGC (Auto-Gain-Control)
  • AGC Auto-Gain-Control
  • the level of the uplink radio signal from each terminal in a mobile communication system varies about 70 to 90 dB in power level due to variations in the distance between terminal radio station devices and the transmission environment.
  • the signals of a plurality of terminals overlap in time in the radio station apparatus, the level fluctuation of the received signal of the radio station apparatus becomes even larger.
  • TDMA Time-Division-Multiple-Access
  • CDMA Code-Divison-Multiple-Access
  • uplink transmission is a circuit switching method using the CD MA method, and therefore, the level of the received signal in the radio station apparatus hardly fluctuates or is interrupted. Not at all. Therefore, there was no major problem with the AGC control of the receiver.
  • the received signal arriving from each terminal is a burst signal in units of time called a frame or a packet, and therefore, the level fluctuation of the rising edge and falling edge of the frame is extremely large.
  • the rise and fall times of the frame are much faster than the time constant of AGC control, so immediately after the rise of the frame, the input power of the AZD converter is too large and the variable gain amplifier saturates and the frame rises.
  • the input power of the AZD converter is too small and the CNR in the variable gain amplifier deteriorates, making it difficult to perform optimal AGC control.
  • Patent Document 1 is known as a technique related to a burst signal receiving method for solving such a problem of AGC control.
  • FIG. 1 is a block diagram of an AGC control circuit in a conventional radio signal receiving apparatus.
  • the variable gain amplifier 1 is receiving a burst signal in the RF (radio frequency) band
  • the difference between the detection result of the level detector 3 and the reference value 6 is calculated by the error calculator 7,
  • AGC control is performed so that the output power is equal to the reference value 6 by feeding back to the control terminal of the variable gain amplifier 1. This eliminates the possibility that the input power of the first AZD transformation 2 is saturated.
  • the AGC control is not performed while the burst signal comes to the variable gain amplifier 1, and the holding circuit 14 receives the control signal to the control terminal of the variable gain amplifier 1 one pulse before.
  • the signal value of the burst signal that is held is used as it is.
  • AGC control ON / OFF is performed based on the timing signal 15 when the burst signal arrives.
  • the radio station apparatus since the radio station apparatus alternately multiplexes transmission frames and reception frames, it is assumed that the reception timing time is known to the radio station apparatus.
  • Patent Document 1 Japanese Patent Laid-Open No. 5-130015
  • the burst signal reception method as described above is based on the premise that the arrival time of the reception signal is extremely strong, and the burst signal field where the arrival time is not strong. In this case, the above AGC control cannot be applied. Also, in wireless communication in next-generation mobile communication systems, signal transmission speeds will increase and IP will advance and packet switching will occur, so it is assumed that the upstream signal will necessarily be a burst signal. become. At this time, if the transmission timing is controlled by the radio station apparatus so that the burst signal of each terminal power does not arrive at random, the time of the reception timing becomes known.
  • the radio station apparatus can be transmitted from a plurality of terminals. Since it is necessary to receive in a state where uplink signals are mixed, the level of the received signal before AZD conversion varies greatly compared to the conventional case. In other words, the amplitude at the rising edge of the burst signal is completely different from that of the past burst signal. Therefore, in the above AGC control method of Patent Document 1, the control signal (that is, the feedback signal) of the variable gain amplifier immediately after the arrival of the burst signal is not an appropriate value.
  • the purpose of the present invention is an AGC that does not saturate the input signal amplitude of the AZD change ⁇ even when the arrival time of the received signal by the burst signal or the received power Z reception level is unknown.
  • a radio signal receiving apparatus having a control circuit is provided.
  • the radio signal receiving device of the present invention includes a power variable unit that varies the power amplification factor of burst signals transmitted wirelessly from a plurality of terminal devices, and a burst signal output from the power variable unit.
  • a radio signal receiving device comprising an AZD conversion means for converting into a digital signal, wherein the burst signal is detected by a detection circuit having a time constant longer than the length of one pulse of the burst signal at the front stage or the rear stage of the AZD conversion means.
  • a configuration is provided that includes a control unit that obtains a difference from the set reference value and feeds back the difference to the power varying unit.
  • the peak amplitude of the burst signal detected at the front stage or the rear stage of the AZD converter and the number of terminals N The monotonically increasing function F (N) calculated based on the above is added to provide feedback to the power variable means (variable gain amplifier).
  • the power variable means variable gain amplifier
  • AGC control can be performed so that the AZD variation input power is not saturated by the maximum burst signal amplitude. As a result, it becomes possible to prevent the input power saturation and CNR degradation of the AZD variation.
  • the input margin of the AZD converter can be minimized even when the number of terminals N is large by appropriately selecting the monotonically increasing function F (N) according to the Poisson distribution. it can. Furthermore, regardless of the amount of traffic of the burst signal, saturation of input power and CNR degradation of AZD changes can be prevented. It is also possible to suppress saturation of the input power of the AZD converter due to a sudden burst signal from an unregistered terminal.
  • FIG. 2 is a block diagram of an AGC control circuit in the radio signal receiving apparatus according to Embodiment 1 of the present invention.
  • FIG. 3 is a block diagram showing another example of the AGC control circuit in the radio signal receiving apparatus according to Embodiment 1 of the present invention.
  • FIG. 4 Characteristic diagram showing signal waveform and variable attenuation in the AGC control circuit shown in Fig. 2
  • the burst signal is random Poisson distribution diagram showing the probability P (n) that burst signals arrive simultaneously from n terminals when arriving at
  • FIG. 8 Characteristic diagram showing the relationship of the monotonically increasing function F ( ⁇ ) to the number of terminals ⁇ that are actually receiving burst signals when the average value of the number of terminals ⁇ receiving burst signals is 2
  • FIG. 10 is a block diagram of an AGC control circuit in the radio signal receiving apparatus according to the second embodiment of the present invention.
  • FIG. 11 is a block diagram of an AGC control circuit in the radio signal receiving apparatus according to the third embodiment of the present invention.
  • FIG. 12 A characteristic diagram showing an example of the shape of the monotonically increasing function F (N) realized by the AGC control circuit of FIG.
  • FIG. 13 A characteristic diagram showing an example of the shape of the monotonically increasing function F (N) with the proper feedback merging realized by the AGC control circuit of FIG.
  • a radio signal receiving apparatus of the present invention is a radio signal receiving apparatus that receives a burst signal of an RF band transmitted by a plurality of terminals, and the AGC control circuit determines the peak value of the amplitude of the received burst signal and AGC control is performed on the variable gain amplifier using the addition value of the monotonically increasing function F (N) calculated based on the number N of terminals connected to the radio signal receiver as the feedback amount.
  • F (N) monotonically increasing function
  • FIG. 2 is a block diagram of an AGC control circuit in the radio signal receiving apparatus according to Embodiment 1 of the present invention.
  • This AGC control circuit includes a variable gain amplifier 101, a first AZD converter 102, a level detector 103, a second AZD converter 104, a reference value 106, an F (N) calculator 108, and a terminal number detector 109.
  • a configuration including a digital demodulation processing unit 111 and a control signal generation unit 110 is employed.
  • the control signal generation unit 110 includes an adder 105, an error calculator 107, and a DZA converter 114.
  • the variable gain amplifier 101 varies the power amplification rate of a burst signal transmitted by radio with a plurality of terminal powers, and amplifies the power to an optimum level.
  • the first AZD variable 102 converts the burst signal amplified by the variable gain amplifier 101 into a digital signal also with an analog signal power.
  • the digital demodulation processing unit 111 performs demodulation processing for separating the burst signals of a plurality of terminals converted from analog signals into digital signals by the first AZD converter 102 into burst signals for each terminal.
  • the level detector 103 detects the peak amplitude of the burst signal by a detection circuit having a time constant longer than the length of one frame of the burst signal that is the received signal, before the first AZD transformation 102.
  • the second AZD translation 104 is detected by the level detector 103.
  • the burst signal of the output analog signal is converted into a digital signal.
  • the terminal number detector 109 detects the number N of terminals recognized by the radio station apparatus (or registered and connected to the radio station apparatus) and stores this information.
  • the F (N) calculator 108 calculates a monotonically increasing function F (N) related to the number N of terminals based on the number N of terminals detected by the terminal number detector 109.
  • the reference value 106 is the maximum value of the input power level at which the first AZD transformation 102 is not saturated.
  • the adder 105 Inside the control signal generation unit 110, the adder 105 includes the power amplitude level of the analog burst signal acquired from the second AZD modification 104 and the terminal on which the F (N) calculator 108 has calculated. Add the monotonically increasing function F (N) for the number N.
  • the error calculator 107 compares the added value of the power amplitude of the burst signal added by the adder 105 and the monotonically increasing function F (N) with the reference value 106 to obtain the difference.
  • the DZA variation ll4 converts the difference obtained by the error calculator 107 into a digital signal force analog signal so that the analog signal of the difference becomes a feedback signal of the variable gain amplifier 101.
  • control signal generator 110 adds the monotone increasing function F (N) calculated by the F (N) calculator 108 to the peak amplitude of the burst signal detected by the level detector 103.
  • the reference value 106 ie, the maximum value of the input power level at which the first AZD conversion 102 is not saturated
  • the radio signal receiving apparatus receives a burst signal in the RF band that is transmitted from a plurality of terminals, not shown
  • the variable gain amplifier 101 amplifies the power of the burst signal
  • the first AZD converter 102 converts the burst signal into an analog signal power. Convert to digital signal.
  • the digital demodulation processing unit 111 separates burst signals of a plurality of terminals into burst signals for each terminal.
  • the level detector 103 detects the peak amplitude of the burst signal
  • the F (N) calculator 108 calculates the monotonically increasing function F (N) based on the number N of terminals detected by the terminal number detector 109.
  • control signal generation unit 110 adds the peak amplitude detected by the level detector 103, the addition value of the monotonically increasing function F (N) calculated by the F (N) calculator 108, and the first AZ
  • the reference value 106 corresponding to the maximum input level of the D conversion 102 is compared, and the variable gain amplifier 101 is AGC controlled using the difference as a control signal (ie, feedback signal).
  • a control signal ie, feedback signal
  • variable gain amplifier 101 receives received signals from a plurality of terminals (not shown).
  • the first AZD converter 102 After amplifying (that is, the burst signal), the first AZD converter 102 converts the burst signal into a digital signal with analog signal power.
  • the burst signal of the digital signal includes burst signals of a plurality of terminals
  • the burst signal for each terminal is individually separated by the digital demodulation processing unit 111 at the subsequent stage.
  • the signal separation method for separating the burst signals of a plurality of terminals into burst signals for each terminal varies depending on the transmission method of the burst signal, and there are various separation methods. Since it is well known, its description is omitted.
  • variable gain amplifier 101 The gain control of the variable gain amplifier 101 is controlled using the output signal from the control signal generation unit 110. Instead of the variable gain amplifier 101, a variable attenuator may be used. In other words, when the level detector 103 detects the amplitude of the burst signal before the first AZD conversion 102, the second AZD converter 104 converts the amplitude of the detected burst signal into a digital signal. Convert. In addition, since the terminal number detector 109 detects and stores information on the number of terminals N registered and connected to the radio station apparatus, the F (N) calculator 108 stores information on the number N of terminals. Based on, the monotonically increasing function F (N) for the number of terminals N is calculated.
  • the adder 105 includes the amplitude level of the burst signal that is the output of the second AZD variable 104, and the monotonically increasing function calculated by the F (N) calculator 108. Add F (N). Further, the error calculator 107 calculates the difference between the amplitude level of the burst signal added by the adder 105, the added value of the monotone increasing function F (N), and the reference value 106. Then, the DZA converter 114 converts the difference into a digital signal power as well as an analog signal, and the difference is transmitted as a feedback signal to the variable gain amplifier 101, and AGC control is performed on the variable gain amplifier 101.
  • the reference value 106 corresponds to the maximum value of the input level of the first AZD transformation 102 to be used.
  • FIG. 3 shows an AGC control circuit in the radio signal receiving apparatus according to Embodiment 1 of the present invention. It is a block diagram which shows the other example of.
  • the difference between FIG. 3 and FIG. 2 is only the configuration of the control signal generator 110a. That is, as shown in FIG. 3, as a configuration of the control signal generation unit 110a, the subtractor 112 uses the monotonically increasing function F (N) calculated by the F (N) calculator 108 from the set level f of the reference value 106. The value obtained by subtracting the level g is set as the subtraction value (f—, and the error calculator 107 calculates the difference between the subtraction value (fg) and the peak amplitude of the burst signal that is the output of the second AZD variable l04.
  • the resulting value may be input as a feedback signal to the variable gain amplifier 101. That is, the monotonically increasing function F (N) is not added to the peak amplitude of the burst signal as shown in FIG. As shown, the error calculator 107 can calculate the difference of the same value even if the monotonically increasing function F (N) is subtracted from the reference value 106.
  • the level power of the burst signal in the previous stage of the first AZD converter 102 is the optimum input power level for the first AZD variable 102. Control can be performed so that
  • the number N of terminals registered and connected to the radio station apparatus (that is, the number N of terminals recognized by the radio station apparatus) is known in real time. Can do. In other words, in a general wireless LAN or mobile communication system, when each terminal first accesses the radio station apparatus, the radio station apparatus registers the newly connected terminal, so the radio station apparatus is connected. Always know the number of terminals N. Therefore, the radio station apparatus can know the number N of terminals in real time without newly providing a means for detecting the number N of terminals. Therefore, as shown in FIG. 2 or FIG.
  • the radio station apparatus can always know the number N of terminals in real time.
  • FIG. 4 shows characteristics of the signal waveform and variable attenuation in the AGC control circuit shown in FIG. It is a figure, time is shown on the horizontal axis, and the signal level and variable attenuation amount are shown on the vertical axis. Draft A in Fig. 4 shows an example of temporal change in the level (amplitude) of the upstream burst signal input to the radio station apparatus, and time T shows the frame length as a unit of the burst signal.
  • the time constant T of the control circuit is sufficiently longer than the time T.
  • Graph B shows the variable attenuation controlled when only simple AGC control is performed in the conventional AGC control circuit as shown in FIG. 1 (that is, feedback to variable gain amplifier 1 in FIG. 1). Change amount of the control amount). That is, when the signal level of the burst signal is large, the variable attenuation is increased so that the input signal of the first AZD transformation 2 is not saturated.
  • the conventional AGC control circuit shown in Fig. 1 follows the signal level change more slowly than the time constant T of the AGC control circuit, but the time constant of the AGC control circuit.
  • the burst signal exceeds the allowable value of the input level of the first AZD converter 2 and characteristic degradation occurs.
  • the monotonically increasing function F (N) is the predicted value of the rising amplitude of the burst signal (that is, the average value of the number of terminals receiving the signal).
  • the reception level of a burst signal arriving from each terminal to the radio station apparatus varies depending on the transmission distance of the signal and the propagation environment. Therefore, it is assumed here that the transmission power control of the terminal is performed so that the reception level from each terminal is almost the same. Based on this assumption, in the CDMA and FDMA systems for uplink signals, the signal of each terminal is Since it arrives at the same time, transmission power control is usually performed so that other terminals' signals become noise and cause no deterioration of characteristics.
  • the level of the burst signal arriving from each terminal to the radio station apparatus is substantially constant. Therefore, it can be said that the signal power at the rising edge of the burst signal is proportional to the number of overlapping burst signals. Therefore, the larger the number N of terminals connected to the radio station apparatus, the higher the probability that the number of burst signals that arrive simultaneously increases, so the power at the rising edge of the burst signal is a monotonically increasing function with respect to the number N of terminals. It will be F (N).
  • the monotonically increasing function F (N) should be determined to be proportional to the predicted value of the rising amplitude of the burst signal.
  • the probability P (n) that burst signals simultaneously arrive from n terminals is a function that decreases as the number of terminals n increases.
  • the N terminal power connected to the radio station apparatus does not always assume that N signals will arrive, so the monotonically increasing function F (N) compared to the first setting method. Is small.
  • the probability P (n) that the burst signal reaches n terminal powers at the same time generally follows a Poisson distribution. Therefore, if ⁇ and a are constants, the probability P (n) that the burst signal will reach n terminals simultaneously is given by the following formula (3), and the monotonically increasing function F (N) is given by the following formula ( 4)
  • Equation 3 The constant represents the average value of the number of signals that reach the radio station apparatus at the same time (that is, the average value of the number n of terminals that are transmitting signals simultaneously), and is a parameter that determines the shape of the Poisson distribution. It will be.
  • Fig. 5 is a Poisson distribution diagram showing the probability P (n) that burst signals arrive simultaneously from n terminals when the average value of the number of terminals n is 5, and the horizontal axis represents the number of terminals n.
  • the probability P (n) that the burst signal arrives at the same time for the n terminal forces is shown on the vertical axis.
  • the relationship between the number N of terminals connected to the radio station device and the number n of terminals transmitting burst signals is N ⁇ n.
  • the average value of the number n of terminals simultaneously transmitting burst signals 5
  • the probability P (n) that burst signals actually arrive from n terminals at the same time is the probability P (0.1 when the highest n is 0.175 when n is 4 or 5, and the probability P ( n) go small. Also, the probability P (n) becomes smaller as n becomes larger than 5.
  • Fig. 6 is a waveform diagram showing the signal level (or the number of terminals ⁇ ) of the burst signal when the average value ⁇ of the number of terminals n simultaneously transmitting burst signals is large! The signal level (or the number of terminals ⁇ ) is shown on the axis. As shown in Fig. 6, when the average value of the number of terminals ⁇ that simultaneously transmit burst signals ⁇ is large (for example, when ⁇ is greater than 2), the received signal waveform of the burst signal is Harm
  • the AGC control loop having a time constant ⁇ ⁇ ⁇ ⁇ in the conventional AGC control circuit has a certain amount of
  • Fig. 7 is a Poisson distribution diagram showing the probability ⁇ ( ⁇ ) that the burst signal arrives simultaneously from ⁇ terminals when the average value of the number of terminals ⁇ simultaneously transmitting burst signals is 2. is there.
  • FIG. 8 shows a monotonically increasing function F (n) for the number of terminals ⁇ that are actually transmitting burst signals simultaneously, when the average value of the number of terminals ⁇ simultaneously transmitting burst signals is 2.
  • the vertical axis in Fig. 8 is a monotonically increasing function F (n) because it is a monotonically increasing function for the number of terminals n that are actually transmitting burst signals simultaneously, rather than the monotonically increasing function F (N).
  • the monotonically increasing function F (n) is monotonically increasing when the number of terminals n actually transmitting burst signals simultaneously from 1 to 5, but is monotonically increasing when the number of terminals n is 5 or more. It can be seen that F (n) is almost constant.
  • the monotonically increasing function F (N) is an estimated value of the amplitude of the burst signal input to the first AZD variable l02, and is the value of the monotonically increasing function F (N) in the above equation (4). Even if the power is deviated, the feedback signal for appropriately controlling the variable gain amplifier 101 is not a big problem.
  • FIG. 9 is a schematic diagram that simplifies the characteristic shape of the monotone increasing function F (N) in FIG.
  • Fig. 9 shows the simplified characteristic of the monotonically increasing function F (N) with respect to the number of terminals N when the characteristic shape of the monotonically increasing function F (N) in Fig. 8 is applied to the function of the above equation (4).
  • the monotonically increasing function F (N) increases as a linear function of the number of terminals N when the number of terminals N is between 1 and 4, and the number of terminals N
  • the monotonically increasing function F (N) is a constant function. Therefore, by making the monotonically increasing function F (N) a simple function like this instead of equation (4), the computing unit of the monotonically increasing function F (N) (that is, the F (N) computing unit) Can be simplified.
  • FIG. 10 is a block diagram of an AGC control circuit in the radio signal receiving apparatus according to the second embodiment of the present invention.
  • the difference between the AGC control circuit of the second embodiment shown in FIG. 10 and the AGC control circuit of the first embodiment shown in FIG. 2 is the difference in the detection means for detecting the signal level of the burst signal. Since the configuration is the same as that of Form 1, redundant description is omitted.
  • the AGC control circuit of the second embodiment shown in FIG. 10 after the first AZD converter 102 converts the burst signal to AZD, the level detector 103a The signal level is detected and input to the adder 105.
  • the level detector 103a does not require an analog detection means and the second AZD modification 104 shown in FIG. 2 is not required.
  • the monotonically increasing function F (N) which is the input margin of the first AZD converter 102, is registered in the radio station apparatus and is based on the number N of terminals. Is calculated. Therefore, no measures are taken against signals from unregistered terminals. In particular, when the number of terminals connected to the radio station apparatus is small, there is a possibility that the input of the AZD converter is likely to be saturated by a burst signal from an unregistered terminal.
  • the radio signal receiving apparatus takes measures against the above problems.
  • the signal margin is a constant d
  • a terminal that is not registered in the radio station apparatus is obtained by setting F (N) as a value obtained by adding the constant d to the above-described equation (4). It is possible to prevent the first AZD variation 102 from being saturated by a powerful incoming signal.
  • FIG. 11 is a block diagram of an AGC control circuit in the radio signal receiving apparatus according to the third embodiment of the present invention. That is, in the AGC control circuit of the third embodiment shown in FIG. 11, an estimated level value 115 and an estimated level value adder 116 are added to the AGC control circuit of the first embodiment shown in FIG.
  • Estimated level value (peak amplitude estimating means) 115 estimates the peak amplitude of a burst signal from one terminal.
  • the estimated level value adder (peak amplitude adding means) 116 adds the peak amplitude value of the burst signal corresponding to the estimated level value 115 to the monotonically increasing function F (N).
  • the estimated level value adder 116 has a burst signal estimation level of one terminal power.
  • the value 115 is added to the monotonically increasing function F (N) from the F (N) calculator 108.
  • the calorie calculator 105 adds a value obtained by adding the monotonically increasing function F (N) and the estimated level value (d) of the burst signal to the burst signal level from the level detector 103 to the error calculator 107.
  • the error calculator 107 can feed back to the variable gain amplifier 101 a control signal that takes into account the estimated level value (d) of the burst signal of one unregistered terminal device.
  • FIG. 12 is a characteristic diagram showing an example of the shape of the monotonically increasing function F (N) realized by the AGC control circuit of FIG. 11.
  • the horizontal axis represents the number of terminals N
  • the vertical axis represents the monotonically increasing function F ( N).
  • the characteristic of the monotonically increasing function F (N) is indicated by a broken line in the figure, and the burst signal of a terminal not registered in the radio station apparatus is indicated by the solid line in the figure.
  • the monotonically increasing function F (N) has a characteristic that is translated in the direction of the vertical axis by the estimated level value d.
  • the characteristic of the solid line of the monotonically increasing function F (N) obtained by adding the estimated level value d of the burst signal is that the feedback amount has too much margin when the number of terminals is N or more. This will cause the device rating of the AGC control circuit to be increased more than necessary.
  • Fig. 13 is a characteristic diagram showing an example of the shape of the monotonically increasing function F (N) realized by the AGC control circuit of Fig. 11 with proper feedback merging.
  • the horizontal axis shows the number of terminals N and the vertical axis shows A monotonically increasing function F (N) is shown.
  • the burst signal reception level of an unregistered terminal is considered to be equivalent to the burst signal reception level of a registered terminal, so that the burst signal of one unregistered terminal is converted to one registered terminal.
  • the characteristic curve of the monotonically increasing function F (N) is translated in the negative direction of the number of terminals N (ie, to the left in the figure) by one terminal. This eliminates the possibility of having too many merges in the feedback even if the number of terminals exceeds N. With the above-described technique, it is possible to suppress the saturation of the input of the first AZD converter 102 due to the burst signal of the unregistered terminal.
  • burst signals arrive at the same time for a plurality of unregistered terminal forces at a very low probability, but when this is taken into consideration, when a is an integer of 2 or more, the monotonically increasing function F If the number of terminals N in (N) is replaced with N + a and the monotonically increasing function F (N + a), then.
  • a radio signal receiving apparatus having an AGC control circuit that does not saturate the amplitude of the input signal of the AZD variation even when the arrival time or received power of the received burst signal is unknown. Therefore, it is extremely effective for the next generation radio station apparatus.

Abstract

La présente invention concerne un dispositif de réception de signal radio incluant un circuit de contrôle CAG, dans lequel un convertisseur analogique-numérique a son amplitude de signal d'entrée insaturée y compris lorsque le temps d'arrivée et le niveau reçu d'un signal de salve ne sont pas connus. Dans ce dispositif de réception de signal radio, lorsque les signaux de salve de bandes de fréquences radioélectriques envoyés à partir d'une pluralité de terminaux sont reçus, un amplificateur à gain variable (101) effectue l'amplification de puissance du signal de salve, un premier convertisseur analogique-numérique (102) convertit le signal de salve à partir d'un signal analogique en un signal numérique, et une unité de traitement de démodulation numérique (111) sépare le signal numérique en un signal de salve pour chaque terminal. À ce moment-là, un détecteur de niveau (103) détecte l'amplitude maximale de salve du signal de salve, et un opérateur F(N) (108) applique une fonction d'augmentation monotone (F(N)) sur la base du numéro de terminal (N) détecté par un détecteur de numéro de terminal (109). Par la suite, une unité de génération de signal de commande (110) compare la valeur ajoutée de l'amplitude maximale de salve détectée et la fonction d'augmentation monotone appliquée (F(N)), à une valeur de référence (106), et soumet l'amplificateur à gain variable (101) à un contrôle CAG en utilisant cette différence de comparaison en tant que signal de commande.
PCT/JP2006/320443 2006-10-13 2006-10-13 Dispositif de réception de signal radio WO2008044307A1 (fr)

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CN102857246A (zh) * 2012-09-17 2013-01-02 泰凌微电子（上海）有限公司 恒包络接收机的自动增益控制方法及装置
WO2017130726A1 (fr) * 2016-01-28 2017-08-03 ソニー株式会社 Dispositif et procédé de traitement d'informations

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WO2011109964A1 (fr) * 2010-03-10 2011-09-15 青岛东软载波科技股份有限公司 Procédé de détection de porteuse, circuit et microcontrôleur connexes
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WO2017130726A1 (fr) * 2016-01-28 2017-08-03 ソニー株式会社 Dispositif et procédé de traitement d'informations
JPWO2017130726A1 (ja) * 2016-01-28 2018-11-15 ソニー株式会社 情報処理装置および方法
JP7073719B2 (ja) 2016-01-28 2022-05-24 ソニーグループ株式会社 情報処理装置および方法

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