JP3972031B2 - Power measurement apparatus, power control apparatus, wireless communication apparatus, and power measurement method - Google Patents

Description

  The present invention relates to a radio communication device constituting a base station or a mobile station used in a radio communication system, a power control device to a power measurement device provided in the radio communication device, and power implemented in the radio communication device. It relates to a measurement method.

  Conventionally, in a wireless communication device used in a wireless communication system, for example, a power control device is incorporated in order to keep the power level of a transmission signal within a predetermined range. Further, the power control device incorporates a power measurement device for measuring the power level of the transmission signal (see Patent Document 1).

  FIG. 12 is a block diagram showing a configuration of a conventional general power measurement apparatus 10. The power measuring apparatus 10 includes a signal input terminal 11, a detector 12, an averaging unit 13, a measurement result output terminal 14, an averaging start timing signal input terminal 15, and an averaging time setting input terminal 16.

FIG. 13 shows the power level and the like of the signal power for each slot of channel A input to the signal input terminal 11 when the power measurement device 10 is applied to a wireless communication system in which the power level changes for each slot. In FIG. 13, a line L21 indicates a slot configuration of channel A, a line L22 indicates a slot synchronization signal for notifying that a boundary between slots has arrived, and a line L23 indicates a power level for each slot. Further, the slot number a _i , a _{i + 1,} a _{i + 2} and the slot length T _slot of the channel A are shown in the line L21, and the power averaging time T _S for calculating the average value of the power level in the line L23. and showing the amount of power in the power averaging time T _S (hatched portion).

Next, the operation of the power measuring apparatus 10 will be described with reference to FIGS. 12 and 13 as appropriate. The signal input to the signal input terminal 11 is converted into a signal such as a voltage representing the power level by the detector 12. Subsequently, the power level signal converted into voltage or the like is averaged in the averaging unit 13 in synchronization with the slot synchronization signal indicated by the line L22 input from the averaging start timing signal input terminal 15. is output from the measured are converted into electric power mean value of the power averaging time T _S that is input from the averaging time setting input terminal 16 result output terminal 14.
Japanese Patent Publication No. 6-91398

However, in the conventional power measurement apparatus 10, it may be difficult to accurately measure the power level of a signal obtained by code division multiplexing a plurality of channels whose power levels change at different periods or timings. FIG. 14 shows the power level and the like of a signal obtained by code division multiplexing a plurality of channels having different power level change timings. In FIG. 14, a line L31 is a slot configuration of channel A, a line L32 is a slot configuration of channel B, a line L33 is a slot synchronization signal of channel A, and a line L34 is a signal obtained by code-division multiplexing of channel A and channel B. The power level, i.e. the total signal power level, is shown respectively. Further, the slot number a _i , a _{i + 1} , a _{i + 2} of the channel A is supplied to the line L31, the slot number b _j , b _{j + 1} , b _{j + 2} of the channel B is supplied to the line L32, and the power is supplied to the line L34. It indicates an averaging time _{T S,} respectively. In FIG. 14, T _slot indicates the slot length of channel A and channel B, and T _diff indicates the shift time of the boundary between the slots of channel A and channel B.

On channel A and the boundary of the deviation time T _diff between slots with channel B, a for total signal power level is changed, the boundary of the deviation time T _diff and power averaging time T _S between the slots are superimposed, the total signal Since the power level naturally also changes, it is difficult to accurately measure the total signal power level.

  The present invention has been made in view of this point, and accurately measures the power level by section averaging even for a signal obtained by code division multiplexing a plurality of channels whose power levels transition at different periods or timings. An object of the present invention is to provide a power measuring device capable of performing the above, a power control device and a wireless communication device including the power measuring device, and a power measuring method.

The power measurement apparatus according to the present invention includes an averaging unit that calculates an average value of power levels of a multiplexed signal in which a plurality of channels are code division multiplexed, and the averaging based on a timing at which the power level of the multiplexed signal transitions The control means which makes the means start calculation of the average value and the adjustment means which adjusts the period for calculating the average value based on the timing at which the power level of the multiplexed signal transitions are adopted.

According to this configuration, since the control unit causes the averaging unit to calculate the power level by the interval averaging in a section where the power level of the multiplexed signal does not change, the power level can be accurately measured.

Further, since the adjusting means can adjust the power averaging time for the averaging means to average the power level of the multiplexed signal, the total signal of signals obtained by multiplexing a plurality of channels having different periods or timings at which the power level changes. When calculating the power level by averaging the sections, even if the length of the section where the total signal power level does not transition is shorter than the power averaging time, accurate power measurement is performed according to the length of those sections. It can be carried out.

The power measuring apparatus according to the present invention includes an averaging unit that calculates an average value of power levels of a multiplexed signal obtained by code division multiplexing a plurality of channels, and a selection unit that selects a reference channel from the plurality of channels. Analysis means for analyzing the timing at which the power level of the selected reference channel transitions , and control means for causing the averaging means to start calculating the average value based on the timing analyzed by the analysis means, The structure which comprises is taken.

According to this configuration, the reference channel is selected from a plurality of channels multiplexed in the multiplexed signal, the power averaging time T _S is set to the interval averaging the total signal power level based on the selected reference channel Therefore, even when the influence level of each channel in the multiplexed signal changes, the correct reference channel can always be selected, so that the accuracy of power measurement can be improved.

The power measurement apparatus according to the present invention includes an averaging unit that calculates an average value of power levels of a multiplexed signal in which a plurality of channels are code division multiplexed, and the averaging based on a timing at which the power level of the multiplexed signal transitions Control means for causing the means to start calculating the average value, and switching means for inputting a signal for causing the averaging means to start calculating the average value in place of the control means when the control means pauses; The structure which comprises is taken.

According to this configuration , since the control unit causes the averaging unit to calculate the power level by the interval averaging in a section where the power level of the multiplexed signal does not change, the power level can be accurately measured. In addition, the switching means is activated when the cycle or timing of the power level transitions , for example, due to a decrease in the number of channels multiplexed in the multiplexed signal, etc. Therefore, it is possible to reduce the power consumption of the power measuring apparatus by stopping the control means and the like.

The power control apparatus according to the present invention includes an averaging unit that calculates an average value of power levels of a multiplexed signal in which a plurality of channels are code division multiplexed, and the averaging based on a timing at which the power level of the multiplexed signal transitions Control means for causing the means to start calculating the average value, gain control means for controlling a gain for amplifying the multiplexed signal based on a reference level and the average value, and a gain controlled by the gain control means And a variable gain means for amplifying the multiplexed signal. According to this configuration, in a section where the power level of the multiplexed signal does not transition, the control means causes the averaging means to calculate the power level by section averaging, so that the power level can be accurately measured, and as a result Multiplexed signals can be amplified to a desired power level.

In the power control device according to the present invention, the gain control means includes a subtracting means for subtracting the average value from the reference level, an adding means for adding the subtraction result obtained by the subtracting means to the reference level, and A configuration is adopted in which the gain for amplifying the multiplexed signal is controlled in accordance with the addition result obtained by the adding means. According to this configuration, the multiplexed signal can be accurately amplified to a desired power level based on the difference between the power level of the multiplexed signal and the reference level.

In the power control apparatus according to the present invention, the gain control means determines the accuracy of the average value, and corrects the subtraction result obtained by the subtraction means to a small value when the accuracy is determined to be insufficient. And a subtracting unit that subtracts the corrected average value from the reference level .

According to this configuration, the average value calculated by the averaging means is subtracted from the reference level, and the accuracy of the average value is determined. When the accuracy is determined to be insufficient, the average is calculated from the reference level. for having a correction means for correcting the difference obtained by subtracting the value to a small value, when the suspect accuracy of the average value of the power averaging time T _S is calculated for the reason of short or the like, substantially disabling the average value It is possible to prevent the power level of the multiplexed signal from fluctuating due to the gain based on the average value with low reliability.

The power control apparatus according to the present invention includes a subtracting unit that subtracts a multiplexed signal obtained by code division multiplexing a plurality of channels from a reference level, and an averaging unit that calculates an average value of the subtraction results obtained by the subtracting unit. Control means for causing the averaging means to start calculating the average value based on the timing at which the power level of the multiplexed signal transitions, and gain for amplifying the multiplexed signal based on the reference level and the average value. The gain control means for controlling and the gain variable means for amplifying the multiplexed signal using the gain controlled by the gain control means are adopted. According to this arrangement, the difference between the power level and the reference level of the multiplexed signal in the averaging means is averaged, even if the total signal power level to a power averaging time in T _S varies, the total signal power level The multiple signals can be accurately amplified with a desired gain without being affected by the change in.

In the power control apparatus according to the present invention, the gain control means includes addition means for adding the average value to the reference level, and amplifies the multiplexed signal according to the addition result obtained by the addition means. A configuration for controlling the gain is adopted. According to this configuration, the multiplexed signal can be accurately amplified to a desired power level based on the difference between the power level of the multiplexed signal and the reference level.

  The wireless communication apparatus according to the present invention employs a configuration including the power control apparatus according to the present invention.

  According to this configuration, since the power control apparatus according to the invention is provided, the power level of the amplified transmission / reception signal can be maintained in an appropriate range, and as a result, the communication quality can be improved.

The power measurement method according to the present invention is based on an averaging step of calculating an average value of a power level of a multiplexed signal in which a plurality of channels are code division multiplexed, and based on a timing at which the power level of the multiplexed signal transitions A control step for starting the calculation of the average value, and a switching step for inputting a signal for starting the calculation of the average value to the averaging step instead of the control step when the control step pauses It was made to comprise.

  According to this method, since the average value of the power level is calculated by averaging the power level of the section in which the power level of the input signal does not transition, the power level can be accurately measured.

In addition, the switching step is activated when, for example, the cycle or timing of the power level transition is the same as the cycle or the like of the transition of the power level of a single channel due to , for example, a decrease in the number of channels multiplexed in the multiplexed signal. Therefore, it is possible to reduce the power consumption of the power measuring apparatus by pausing the processing in the control step.

  According to the present invention, the longest interval in which the total signal power level does not change is selected for a signal obtained by multiplexing a plurality of channels having different power level transition periods or timings, and the total signal in the selected longest interval is selected. Since the power level is measured and section averaged, the total signal power level can be accurately measured.

  The essence of the present invention is to select a longest interval in which the total signal power level does not change for a signal obtained by multiplexing a plurality of channels having different power level transition periods or timings, and in the selected longest interval, the total signal It is to measure the power level and average the section.

(Embodiment 1)
FIG. 1 is a block diagram showing a configuration of power measuring apparatus 100 according to Embodiment 1 of the present invention. The power measurement apparatus 100 includes a signal input terminal 101, a detector 102, an averaging unit 103, a power measurement result output terminal 104, an averaging start timing control unit 105, a power transition timing analysis unit 106, a power transition timing information input terminal 107, and An averaging time setting input terminal 108 is provided. The power measuring apparatus 100 is normally used by being incorporated in a wireless communication apparatus such as a base station or a mobile station that constitutes a wireless communication system.

  An input signal obtained by code division multiplexing a plurality of channels having different power level transition periods is input to the signal input terminal 101 from a distributor (not shown). The input signal input to the signal input terminal 101 is immediately input to the detector 102.

  The detector 102 converts the power level of the input signal from the signal input terminal 101 into a voltage, and inputs the converted power level signal to the averaging unit 103.

The averaging unit 103 starts measuring the power level of the power level signal input from the detector 102 when the averaging start timing signal is input from the averaging start timing control unit 105. The averaging unit 103 accumulates the measured value during the power averaging time T _S notified from the averaging time setting input terminal 108, and immediately after the power averaging time T _S elapses, Calculate the section average. Then, averaging section 103 outputs the calculated section average value of the power level to power measurement result output terminal 104.

  The averaging start timing control unit 105 averages the averaging start timing signal when the longest interval specified by the power transition timing analysis unit 106 has arrived based on the information input from the power transition timing analysis unit 106. 103.

  The power transition timing analysis unit 106 receives, via a power transition timing information input terminal 107, information about the timing at which the power level of each channel transitions for a plurality of channels code-multiplexed on the input signal. Based on the information from the power transition timing information input terminal 107, the power transition timing analysis unit 106 calculates a cycle in which the preset power level of the reference channel transitions, and the power level for each channel within the one cycle is calculated. The transition timing is analyzed to identify the longest interval in which the total signal power level does not change. Then, the power transition timing analysis unit 106 inputs information about the specified longest interval to the averaging start timing control unit 105.

FIG. 2 and FIG. 3 show the power level and the like for each slot of a signal obtained by code division multiplexing a plurality of channels having different power level transition periods or timings. 2 and 3, line L201 and line L301 indicate the slot configuration of channel A, line L202 and line L302 indicate the slot configuration of channel B, line L203 and line L303 indicate the slot synchronization signal of channel A, and line L204 and Line L304 is the slot synchronization signal for channel B, line L205 and line L305 are the power level for each slot of channel A, line L206 and line L306 are the power level for each slot of channel B, and line L207 and line L307 are the channel levels. The power level of the signal obtained by code division multiplexing the A slot and the channel B slot, that is, the total signal power level is shown. L203 and L204 are input to the power transition timing information input terminal 107.

2 and 3, the line L201 and the line L301 have slot numbers a _i , a _{i + 1} and a _{i + 2} of the channel A, and the line L202 and the line L302 have slot numbers b _j and b of the channel B. b _{j + 1} and b _{j + 2} are appended respectively. 2 and 3, T _slot is the slot length of channel A and channel B, T _diff is the boundary shift time between the slots of channel A and channel B, and T _1st and T _2nd are the channel A Each section in which the total signal power level does not transition with the slot as a reference is shown. 2 and 3, the line L205 and the line L305 have power levels pa _{, i} , pa _{, i + 1} , pa _{, i + 2} for the slots of the channel A, and the lines L206 and L306. Transitions power levels p _{b, j} , p _{b, j + 1} , p _{b, j + 2} for each slot of channel B, and line L 207 and line L 307 change according to the multiplexing mode of the slot of channel A and the slot of channel B the total signal power levels and power averaging time T _S that, respectively.

Next, the operation of the power measuring apparatus 100 will be specifically described with reference to FIGS. 1, 2, and 3 as appropriate. When information about the timing at which the power level of a plurality of channels code-multiplexed with the input signal transitions is input from the power transition timing information input terminal 107 to the power transition timing analysis unit 106, the power transition timing analysis unit 106 The transition timing of the power level of each channel within one period of the period (one slot) in which the power level of a preset reference channel (referred to as channel A) transitions is analyzed, and the total signal power is based on the analysis result. The longest section where the level does not change is specified. Information on the identified longest interval is input from the power transition timing analysis unit 106 to the averaging start timing control unit 105. The averaging start timing control unit 105 inputs an averaging start timing signal to the averaging unit 103 when the longest interval starts based on the input information about the longest interval. When the averaging start timing signal is input, the averaging unit 103 starts the averaging process for the power level signal from the detector 102. In the case of FIG. 2, since T _1st <T _2nd for slot a _i , T _2nd is the longest section, and the averaging unit 103 starts the averaging process at the head of T _2nd . Similarly, in the case of FIG. 3, since T _1st > T _2nd , the averaging unit 103 starts the averaging process at the head of T _1st . The averaging unit 103 that has started the averaging process for the power level signal from the detector 102 accumulates the measurement value during a preset power averaging time T _S notified from the averaging time setting input terminal 108. Then, immediately after the power averaging time T _S elapses, the section average value of the power level is calculated. Then, the averaging unit 103 promptly inputs the calculated section average value of the power level to the power measurement result output terminal 104.

  2 and 3 exemplify the case where there are two channels, the power measurement apparatus 100 can be used even when there are three or more channels and the periods of transition of the power levels of the channels are different. it can.

FIG. 4 shows the timing at which the power level of each channel transitions for five channels having different power level transition periods. In FIG. 4, it is assumed that the cycle in which the power level for each channel transitions is constant. In FIG. 4, line L401 indicates the timing when the power level of the first channel transitions, line L402 indicates the timing when the power level of the second channel transitions, and line L403 indicates the timing when the power level of the third channel transitions. L404 indicates the timing at which the power level of the fourth channel transitions, and line L405 indicates the timing at which the power level of the fifth channel transitions. 4, the timing of the i-th and (i + 1) -th power level of the first channel transitions q _{1, i} and q _{1, i + 1} shown in the line L401, respectively, likewise q _{2, j} and q _{2, j +1} is the timing at which the j-th and j + 1-th power levels of the second channel transition, and similarly q _{3, k} , q _{3, k + 1} and q _{3, k + 2} are the k-th of the third channel, respectively. , K + 1-th and k + 2-th power level transitions, similarly, q4 _{, m} , q4 _{, m + 1} and q4 _{, m + 2} are the mth, m + 1th and m + 2th of the fourth channel, respectively. Similarly, q _{5, n} and q _{5, n + 1} indicate the timings at which the nth and n + 1th power levels of the fifth channel transition, respectively.

When the reference channel is the first channel, the longest interval (T _max ) in which the total signal power level does not transition between q _{1, i} and q _{1, i + 1} indicated by the line L401 is q _{2, j} and q _{3. ,} between _{k + 1} . Then, the averaging unit 103 starts the averaging process at the timing when q _{2, j} that is the head of the longest section arrives.

  As described above, according to the power measurement apparatus 100 according to the present embodiment, the averaging start timing control unit 105 notifies the averaging unit 103 in synchronization with the longest interval in which the total signal power level of the input signal does not transition. Since the power level averaging process is started, it is possible to accurately measure the power level of an input signal obtained by code division multiplexing a plurality of channels whose power levels transition at different periods or timings.

(Embodiment 2)
FIG. 5 is a block diagram showing a configuration of power measuring apparatus 500 according to Embodiment 2 of the present invention. The power measuring apparatus 500 includes all the components of the power measuring apparatus 100 according to the first embodiment, and further includes an averaging time adjustment unit 501. Therefore, since most of the components of the power measuring device 500 perform the same functions as the components of the power measuring device 100, in order to avoid duplication of the components that perform the same function, Description is omitted.

The averaging time adjustment unit 501 is based on the information about the time length of the longest interval in which the total signal power level is not input, which is input from the power transition timing analysis unit 106, and is shorter than this time length and has a power level interval determine the time sufficient to accurately calculate the average value, and notifies the determined time or power averaging time T _S the averaging unit 103.

Next, the operation of the power measuring apparatus 500 will be described with reference to FIG. 5 as appropriate. When the longest interval is specified in the power transition timing analysis unit 106, information about the specified longest interval is input from the power transition timing analysis unit 106 to the averaging start timing control unit 105 and the averaging time adjustment unit 501. Is done. The information about the longest section includes information about the time length of the longest section. When the information about the longest section is input, the averaging time adjustment unit 501 is shorter than the longest section and has a power level. _Is determined, and the determined power averaging time T _S is notified to the averaging unit 103. Then, the averaging unit 103 ends the averaging process for the received level of the rapidly input signal when the notified power averaging time T _S has elapsed.

According to power measuring apparatus 500 according to the present embodiment, longest interval in which power level of input signal does not transition power averaging time T _S according to the transition state of power level of input signal. The power level of the input signal can always be accurately measured even if the longest period changes.

(Embodiment 3)
FIG. 6 is a block diagram showing a configuration of power measuring apparatus 600 according to Embodiment 3 of the present invention. The power measurement apparatus 600 includes all the components of the power measurement apparatus 100 according to the first embodiment, and further includes a reference channel selection unit 601 and an information input terminal 602. Therefore, most of the components of the power measuring device 600 perform the same function as the components of the power measuring device 100. Therefore, in order to avoid duplication of components that perform the same function, Description is omitted.

  Next, the operation of the power measuring apparatus 600 will be described with reference to FIG. 6 as appropriate. The reference channel selection unit 601 selects a reference channel based on information such as the characteristics of each channel input to the information input terminal 602 (period in which the power level changes), and performs a power transition timing analysis on the selected reference channel. Notification to the unit 106.

  Therefore, according to power measurement apparatus 600 according to the present embodiment, according to the transition state of the power level of the input signal, for example, by selecting a channel that has a dominant influence on the power level as a reference channel. Thus, the section average value of the power level of the input signal can be easily and accurately measured and calculated.

  The power measurement apparatus 500 may include a reference channel selection unit 601 and an information input terminal 602.

(Embodiment 4)
FIG. 7 is a block diagram showing a configuration of power measuring apparatus 700 according to Embodiment 4 of the present invention. The power measuring apparatus 700 includes all the components of the power measuring apparatus 100 according to Embodiment 1, and further includes a stop signal input terminal 701, a switching unit 702, and an averaging start timing signal input terminal 703. Therefore, since most of the components of the power measuring apparatus 700 perform the same function as the components of the power measuring apparatus 100, in order to avoid duplication of the components that perform the same function, Description is omitted.

  Next, the operation of the power measuring apparatus 700 will be described with reference to FIG. 7 as appropriate. During the measurement of the power level of an input signal obtained by code division multiplexing a plurality of channels having different power level transition periods or timings, the number of code-division multiplexed channels decreases or the power level transition period and timing changes. In some cases, it may be necessary to measure the power level of a single channel. In such a case, since the operations of the averaging start timing control unit 105 and the power transition timing analysis unit 106 are unnecessary, it is preferable to pause these components.

  In view of this, the power measurement apparatus 700, when a situation in which the operations of the averaging start timing control unit 105 and the power transition timing analysis unit 106 are unnecessary occurs, causes the stop signal to be averaged via the stop signal input terminal 701. When the operation is stopped by inputting to the control unit 105 and the power transition timing analysis unit 106, the stop signal is also input to the switching unit 702, and the power level is input via the averaging start timing signal input terminal 703. A timing signal for starting the averaging process is input to the averaging unit 103.

  The power measurement apparatus 700 according to the present embodiment has the basic configuration of the power measurement apparatus 100 according to the first embodiment, but instead of the power measurement apparatus 100, the power measurement apparatus 500 according to the second embodiment The power measurement apparatus 600 according to Embodiment 3 may be provided as a basic configuration. When the power measuring device 700 includes the power measuring device 500 or the power measuring device 600 as a basic configuration, the averaging time adjustment is performed when the averaging start timing control unit 105 and the power transition timing analysis unit 106 are suspended. It is preferable that the unit 501 and the reference channel selection unit 601 are also paused.

  As described above, according to the power measurement apparatus 700 according to the present embodiment, the unnecessary operation of the components is suspended, and the signal necessary for the averaging process of the power level of the input signal is averaged by the switching unit 702. Therefore, the power consumption of the power measurement apparatus 700 can be reduced according to the transition state of the power level of the input signal.

(Embodiment 5)
FIG. 8 is a block diagram showing a configuration of power control apparatus 800 according to Embodiment 5 of the present invention. The power control apparatus 800 includes a power measurement apparatus 100 according to the first embodiment, a signal input terminal 801, a gain variable unit 802, a distributor 803, a signal output terminal 804, a subtraction unit 805, a low-pass filter (LPF) 806, and an addition unit 807. And a reference level input terminal 808. Hereinafter, the power control apparatus 800 will be described with reference to the drawings as appropriate, but the description of the power measurement apparatus 100 is omitted to avoid duplication.

  The signal input terminal 801 receives a signal obtained by code division multiplexing a plurality of channels having different periods or timings at which the power level transitions. The signal input to the signal input terminal 801 is immediately input to the gain variable unit 802.

  The gain variable unit 802 appropriately adjusts the gain according to the gain control value provided from the adding unit 807, and amplifies the input signal from the signal input terminal 801 with the adjusted gain. Further, the gain variable unit 802 inputs the amplified input signal to the distributor 803.

  The distributor 803 distributes the amplified input signal from the gain variable unit 802, inputs the distributed input signal to the detector 102, and outputs it to the signal output terminal 804.

  The subtraction unit 805 subtracts the section average value calculated by the averaging unit 103 from the reference level input via the reference level input terminal 808, and inputs the difference resulting from the subtraction to the low-pass filter 806.

  The low-pass filter 806 suppresses a sudden change in the difference due to the subtraction input from the subtraction unit 805 to the addition unit 807.

  The adding unit 807 calculates the gain control value by adding the difference resulting from the subtraction in the subtracting unit 805 input through the low-pass filter 806 to the reference level input through the reference level input terminal 808, The calculated gain control value is input to gain variable section 802.

  Next, the operation of the power control apparatus 800 will be described with reference to FIG. 8 as appropriate. An input signal obtained by code-division multiplexing a plurality of channels input to the signal input terminal 801 is amplified with a gain adjusted according to the gain control value from the adder 807 in the gain variable unit 802, and then the distributor 803. Fork. One of the input signals branched by the distributor 803 is output to the signal output terminal 804, and the other is input to the detector 102 of the power measuring apparatus 100. The section average value of the power level calculated by performing predetermined processing in the detector 102 and the averaging unit 103 is input to the subtraction unit 805 and compared with the reference level from the reference level input terminal 808, and The comparison result is input to the adding unit 807 via the low pass filter 806. In the addition unit 807, the comparison result in the subtraction unit 805 is added to the reference level, and the gain control value is provided to the gain variable unit 802. Then, the gain variable unit 802 observes the gain control value provided from the adder 807 in time series, and the input signal from the signal input terminal 801 amplifies the desired power after amplification according to the increase or decrease of the gain control value. The gain is feedback-adjusted so that it becomes level.

  The power control apparatus 800 according to the present embodiment includes the power measurement apparatus 100 according to the first embodiment, but includes a power measurement apparatus 500, 600, or 700 instead of the power measurement apparatus 100. You may do it.

  Therefore, according to the power control apparatus 800 according to the present embodiment, the power level of the input signal is accurately measured by the power measurement apparatus 100, so that the input signal can be amplified to a desired power level.

(Embodiment 6)
FIG. 9 is a block diagram showing a configuration of power control apparatus 900 according to Embodiment 6 of the present invention. The power control apparatus 900 includes a power measurement apparatus 500 instead of the power measurement apparatus 100 in the power control apparatus 800 according to the fifth embodiment, and further includes a correction amount control unit 902 and a level correction unit 903. . Therefore, most of the components of the power control device 900 exhibit the same functions as the components of the power control device 800 and the power measurement device 500. Therefore, the components that exhibit the same function are duplicated. In order to avoid this, the description is omitted.

The correction amount control unit 902 is provided with information on the power averaging time T _S from the averaging time adjustment unit 501. Correction amount control unit 902 has a short power averaging time T _S on the basis of the information provided, when the accuracy of the interval average value of the power level calculated in averaging section 103 is determined to be insufficient, The level correction unit 903 is controlled to correct the difference between the section average value input from the subtraction unit 805 and the reference level to a small value, and the corrected value is supplied to the addition unit 807 via the low-pass filter 806. input.

  Therefore, according to the power control apparatus 900 according to the present embodiment, when the accuracy of the section average value of the power level calculated by the averaging unit 103 is insufficient, the correction amount control unit 902 and the level correction unit 903 Since the difference between the section average value and the reference level is corrected to a smaller value, the gain used in the gain variable unit 802 can be prevented from fluctuating based on the section reliability value with low reliability. As a result, the gain can be varied. A sudden change in the amplification state in the portion 802 can be suppressed.

(Embodiment 7)
FIG. 10 is a block diagram showing a configuration of power control apparatus 1000 according to Embodiment 7 of the present invention. The power control apparatus 1000 includes an information input terminal 1001 that inputs characteristic information of an input signal to the correction amount control unit 902 in the power control apparatus 900 according to the sixth embodiment. Therefore, most of the components of the power measuring apparatus 1000 perform the same functions as the components of the power control apparatus 900. Therefore, in order to avoid duplication of components that perform the same functions, Description is omitted.

Here, operations of the power control apparatus 1000, particularly operations of the correction amount control unit 902 and the level correction unit 903, will be described with reference to FIG. Information indicating the characteristics of the input signal input to the signal input terminal 801, for example, a modulation method, a modulation speed, and the like is input from the information input terminal 1001 to the correction amount control unit 902. The correction amount control unit 902, based on the information that has been input, the newly set standards for power averaging time T _S that is used in determining the accuracy of the average value of the power level. Then, the correction amount control unit 902 controls the correction amount in the level correction unit 903 based on the newly set reference.

Therefore, according to power control apparatus 1000 according to the present embodiment, in addition to the effect exerted by power control apparatus 900, the determination of the accuracy of the average value of the power level according to the modulation speed of the input signal, etc. because it can appropriately adjust the criteria applied to the power averaging time T _S in, it is possible to maintain the gain to be used in the amplification of the input signal in the gain varying section 802 optimally. For example, the power control unit 1000, when a modulation speed of the input signal is high, a shorter power averaging rate T _S, while the when the modulation speed is low, a longer power averaging rate T _S.

(Embodiment 8)
FIG. 11 is a block diagram showing a configuration of power control apparatus 1100 according to Embodiment 8 of the present invention. The power control apparatus 1100 is obtained by changing the arrangement of the subtraction unit 805 between the detector 102 and the averaging unit 103 in the power control apparatus 800 according to the fifth embodiment. Therefore, all the components of the power control apparatus 1100 exhibit the same functions as the components of the power control apparatus 800. Therefore, in order to avoid duplication of the components that exhibit such a similar function, Description is omitted. In FIG. 11, the averaging start timing control unit 105, the power transition timing analysis unit 106, and the power transition timing information input terminal 107 are omitted.

In the power control apparatus 1100, the power level signal from the detector 102 is compared with the reference level from the reference level input terminal 808, and an averaging process is performed on the difference obtained by subtracting the power level signal from the reference level. Will be given. Therefore, in the power control device 1100 according to this embodiment, even if the total signal power level of the input signal to the power averaging time in T _S is changed, averaging the difference between the reference level and the power level after detection Therefore, even when the total signal power level changes, more accurate power control can be performed without being affected by the transition.

  The power measurement apparatus, power control apparatus, wireless communication apparatus, and power measurement method according to the present invention accurately measure the total signal power level of a signal obtained by multiplexing a plurality of channels having different periods or timings of power level transitions. And is useful as a base station or mobile station used in a wireless communication system.

The block diagram which shows the structure of the electric power measurement apparatus which concerns on Embodiment 1 of this invention. Timing chart for explaining the operation of the power measuring apparatus according to the first embodiment of the present invention. Timing chart for explaining the operation of the power measuring apparatus according to the first embodiment of the present invention. Timing chart for explaining the operation of the power measuring apparatus according to the first embodiment of the present invention. The block diagram which shows the structure of the electric power measurement apparatus which concerns on Embodiment 2 of this invention. The block diagram which shows the structure of the electric power measurement apparatus which concerns on Embodiment 3 of this invention. The block diagram which shows the structure of the electric power measurement apparatus which concerns on Embodiment 4 of this invention. The block diagram which shows the structure of the power control apparatus which concerns on Embodiment 5 of this invention. The block diagram which shows the structure of the power control apparatus which concerns on Embodiment 6 of this invention. The block diagram which shows the structure of the power control apparatus which concerns on Embodiment 7 of this invention. The block diagram which shows the structure of the power control apparatus which concerns on Embodiment 8 of this invention. Block diagram showing the configuration of a conventional power measurement device Timing diagram for explaining the operation of a conventional power measuring device Timing diagram for explaining the operation of a conventional power measuring device

Explanation of symbols

100, 500, 600, 700 Power measurement device 101 Signal input terminal 102 Detector 103 Averaging unit 104 Power measurement result output terminal 105 Averaging start timing control unit 106 Power transition timing analysis unit 107 Power transition timing information input terminal 108 Averaging Time setting input terminal 501 Averaging time adjustment unit 601 Reference channel selection unit 602 Information input terminal 701 Stop signal input terminal 702 Switching unit 703 Averaging start timing signal input terminal 800, 900, 1000, 1100 Power control device 801 Signal input terminal 802 Gain variable section 803 Divider 804 Signal output terminal 805 Subtractor 806 Low pass filter 807 Adder 808 Reference level input terminal 902 Correction amount control section 903 Level correction section 1001 Signal input terminal

Claims (10)

Averaging means for calculating an average value of power levels of a multiplexed signal in which a plurality of channels are code division multiplexed ;
Control means for causing the averaging means to start calculating the average value based on the timing at which the power level of the multiplexed signal transitions;
Adjusting means for adjusting a period for calculating the average value based on a timing at which the power level of the multiplexed signal transitions;
A power measuring device comprising: Averaging means for calculating an average value of power levels of a multiplexed signal in which a plurality of channels are code division multiplexed;
Selecting means for selecting a reference channel from the plurality of channels;
Analysis means for analyzing the timing of transition of the power level of the selected reference channel;
Control means for causing the averaging means to start calculating the average value based on the timing analyzed by the analyzing means;
A power measuring device comprising: Averaging means for calculating an average value of power levels of a multiplexed signal in which a plurality of channels are code division multiplexed;
Control means for causing the averaging means to start calculating the average value based on the timing at which the power level of the multiplexed signal transitions;
A switching means for inputting a signal for starting the calculation of the average value to the averaging means instead of the control means when the control means pauses;
A power measuring device comprising: Averaging means for calculating an average value of power levels of a multiplexed signal in which a plurality of channels are code division multiplexed ;
Control means for causing the averaging means to start calculating the average value based on the timing at which the power level of the multiplexed signal transitions;
Gain control means for controlling a gain for amplifying the multiplexed signal based on a reference level and the average value;
Gain variable means for amplifying the multiplexed signal using the gain controlled by the gain control means;
A power control apparatus comprising: The gain control means includes
Subtracting means for subtracting the average value from the reference level;
Adding means for adding the subtraction result obtained by the subtracting means to the reference level;
The gain for amplifying the multiplexed signal is controlled according to the addition result obtained by the adding means
The power control apparatus according to claim 4. The gain control means includes
When the accuracy of the average value is determined, and the accuracy is determined to be insufficient, the correction means for correcting the subtraction result obtained by the subtraction device to a small value,
The subtracting unit subtracts the corrected average value from the reference level.
The power control apparatus according to claim 5. Subtracting means for subtracting a multiplexed signal obtained by code division multiplexing a plurality of channels from a reference level;
Averaging means for calculating an average value of the subtraction results obtained by the subtracting means;
Control means for causing the averaging means to start calculating the average value based on the timing at which the power level of the multiplexed signal transitions;
Gain control means for controlling a gain for amplifying the multiplexed signal based on the reference level and the average value;
Gain variable means for amplifying the multiplexed signal using the gain controlled by the gain control means;
A power control apparatus comprising: The gain control means includes
Adding means for adding the average value to the reference level;
The gain for amplifying the multiplexed signal is controlled according to the addition result obtained by the adding means
The power control apparatus according to claim 7. A wireless communication apparatus comprising the power control apparatus according to claim 4 . An averaging step for calculating an average value of power levels of a multiplexed signal in which a plurality of channels are code division multiplexed ;
A control step for causing the averaging step to start calculating the average value based on the timing at which the power level of the multiplexed signal transitions;
When the control step pauses, a switching step for inputting a signal for starting the calculation of the average value to the averaging step instead of the control step;
A power measurement method comprising:

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