JP2000252897A - Receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To conduct accurate directivity control by preventing generation of null formation from being insufficient due to errors at A/D conversion. SOLUTION: A connection coefficient calculation means 105 of this receiver calculated the mean value of reception levels which are the outputs of A/D converters 103, 104, calculates a correction coefficient to make each reception level same as a means value and multipliers 106, 107 multiply the correction coefficient decoded by the correction coefficient calculation means 105 by the reception signal after A/D conversion, so as to make a reception level of each antenna the same as the means value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a receiving device,
In particular, it relates to a receiving device used for digital wireless communication.

[0002]

2. Description of the Related Art A conventional receiving apparatus controls the directivity of an antenna by weighting and combining input signals from a plurality of antennas.

That is, the radio wave arriving from the desired arrival direction is heavily weighted, and the unnecessary radio wave arriving from a direction other than the desired arrival direction is lightly weighted, so that the desired wave is strongly received. , Unnecessary waves are removed.

A conventional receiving apparatus for receiving data having such directivity will be described below with reference to FIG. FIG. 6 is a main block diagram showing a schematic configuration of a conventional receiving apparatus.

In FIG. 6, antennas 601 and 602
Receives the signal propagated by the radio wave and outputs the signal to the A / D converter 603.
And 604 convert the analog signal received at the antenna into a digital signal.

A weighting factor controller 605 calculates weighting factors for weighting and adding the received signal after digital conversion, and multipliers 606 and 607 determine weighting factors given by the weighting factor controller and A / D Converters 603 and 60
4 is multiplied by the input signal.

The adder 608 includes multipliers 606 and 607
Are combined and output to the propagation path distortion compensator 609 described later. The propagation path distortion compensator 609 estimates and compensates for the distortion of the radio wave given along the course of radio wave propagation, and outputs the same to a detector 610 described later.

[0008] Detector 610 performs detection processing on the distortion-compensated received signal to obtain received data. The received data is output to a multiplier 611 described later. Multiplier 6
Reference numeral 11 multiplies the propagation path distortion information input from the propagation path distortion compensator 609 by the reception data output from the detector 610, and outputs the result to a subtractor 612 described later.

The subtractor 612 calculates the difference between the output of the multiplier 611 and the output of the adder 608 and outputs the calculated difference to the weight coefficient controller 605 as a parameter for updating the weight coefficient when combining the reception signals of the antennas.

As described above, the conventional receiving apparatus sets directivity by combining input signals from a plurality of antennas after performing weighting processing, strongly receives radio waves arriving from a desired direction of arrival, and sets a desired direction of arrival. In order to remove unnecessary radio waves arriving from directions other than the above, it is possible to receive data with directivity.

[0011]

However, in the conventional receiving apparatus, there is a problem that an unnecessary radio wave removing performance is deteriorated due to an error at the time of A / D conversion. That is,
If an error occurs in the A / D converter provided for each antenna, the signal level input to the weight coefficient controller differs from the actual antenna reception level, and the performance of removing unnecessary radio waves deteriorates.

FIG. 7 is a schematic diagram showing a reception directivity pattern. Here, it is assumed that a desired signal arrives from an arrival angle of 0 degrees and an unnecessary signal arrives from 60 degrees.
Pattern A in FIG. 7 shows a directional pattern when there is no error in the A / D converter. This directional pattern can remove unnecessary radio waves arriving from the direction of 60 degrees by forming a null at the arrival angle of 60 degrees indicated by two arrows in the figure.

On the other hand, a pattern B indicates a directivity pattern when an error occurs in the A / D converter and the output of the A / D converter is smaller than the actual value by about 10%.
With such a directional pattern, the formation of nulls is insufficient, and it is not possible to appropriately remove unnecessary radio waves.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a receiving apparatus that prevents the formation of nulls from becoming insufficient due to an error in A / D conversion and performs accurate directivity control. With the goal.

[0015]

SUMMARY OF THE INVENTION The gist of the present invention is that in consideration of the fact that the signal received by each antenna is only the phase difference due to the antenna arrangement and the reception level is the same, the difference between the reception levels is A / D conversion error,
By adjusting the reception level of the received signal before the directivity of the received signal after the D conversion is set by the weighting process and the combining process, it is possible to prevent insufficient null formation due to an error at the time of A / D conversion. That is, it is necessary to accurately remove unnecessary radio waves.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A receiving apparatus according to a first aspect of the present invention comprises a correcting means for adjusting the reception level of each signal received by a plurality of antennas to an arbitrary value, and for each signal after this correction. A directivity setting means for performing weighting synthesis processing such that radio waves from the desired arrival direction are strong and radio waves from other than the desired arrival direction are weakly received.

According to this configuration, the reception levels of the respective antennas, which are supposed to be different from each other only in phase and should be the same, are aligned before the reception signal is weighted, and each reception level is adjusted by an error in A / D conversion. Since the directivity is set by the weighting process and the combining process after eliminating the effect of the non-uniformity of the non-uniformity, the directivity control by null formation can be accurately performed, and the deterioration of the unnecessary signal removing capability can be prevented.

A receiving apparatus according to a second aspect of the present invention, in the first aspect, employs a configuration in which the correction means adjusts the reception level of each signal to an average value.

According to this configuration, the reception levels of the respective antennas, which are supposed to have only the same phase but different phases, are adjusted to the average value before the received signal is weighted.
In order to remove the effect that each reception level becomes non-uniform due to an error at the time of / D conversion, the directivity is set by weighting processing and combining processing. Degradation can be prevented.

[0020] In a receiving apparatus according to a third aspect of the present invention, in the second aspect, the correction means may include a measuring section for measuring a reception level of each of the signals, and a measuring section for measuring the reception level of each of the signals. An average value calculation unit for calculating an average value, a correction coefficient calculation unit for calculating a correction coefficient for adjusting the reception level of each signal to the average value, and a multiplication unit for multiplying each signal by the calculated correction coefficient And a configuration having the following.

According to this configuration, since each reception level can be multiplied by the correction coefficient and each reception level can be made equal to the average value, it is possible to prevent the null formation from becoming insufficient due to an error at the time of A / D conversion. In addition, unnecessary radio waves can be accurately removed.

According to a fourth aspect of the present invention, in the receiving apparatus according to the third aspect, the correction coefficient calculating section may divide the average value by a reception level value of each signal, or A reciprocal of the signal reception level value is calculated, and a multiplication unit for multiplying the reciprocal by the average value is employed.

According to this configuration, since the ratio of each reception level to the average value can be calculated, a correction coefficient to be multiplied to make each reception level equal to the average value can be calculated.

According to a fifth aspect of the present invention, in the receiving apparatus according to the third aspect or the fourth aspect, the correction means subtracts a reception level value of each signal from the average value. A determining unit for determining the absolute value of the subtraction result by a threshold value provided in advance, and determining only the reception level of a signal whose absolute value of the subtraction result is lower than the threshold value by the average value calculating unit And a control unit that controls so as to be input to the control unit.

According to this configuration, the accuracy of calculating the average value can be improved by not using the reception level value of the reception signal whose reception level value is significantly different from that of another antenna in the averaging process. The direction of the unnecessary radio wave can be accurately estimated and removed.

[0026] In a receiver according to a sixth aspect of the present invention, in any one of the third to fifth aspects, the correction means performs a time averaging process on the output of the average value calculating section. A configuration having a time averaging unit is employed.

According to this configuration, the average value calculation accuracy can be improved by time-averaging the average value of each reception level, so that the direction of the unnecessary radio wave can be accurately estimated and removed. .

The receiving apparatus according to a seventh aspect of the present invention employs a configuration in which the correction means corrects the reception level of each signal to a reception level at which the variance of each reception level becomes equal.

According to this configuration, since the variance of each reception level can be made equal by multiplying each reception level by the correction coefficient, it is possible to prevent the null formation from becoming insufficient due to an error at the time of A / D conversion. In addition, unnecessary radio waves can be accurately removed.

[0030] A communication terminal apparatus according to an eighth aspect of the present invention employs a configuration including the receiving apparatus according to any one of the first to seventh aspects.

According to this configuration, it is possible to prevent the directivity control performance from being deteriorated due to an error at the time of A / D conversion.

[0032] The base station apparatus according to the ninth aspect of the present invention comprises:
A configuration for performing wireless communication with the communication terminal device according to the eighth aspect is employed.

According to this configuration, it is possible to prevent the directivity control performance from deteriorating due to an error during A / D conversion.

[0034] A base station apparatus according to a tenth aspect of the present invention employs a configuration including the receiving apparatus according to any one of the first to seventh aspects.

According to this configuration, it is possible to prevent the directivity control performance from deteriorating due to an error during A / D conversion.

A communication terminal apparatus according to an eleventh aspect of the present invention employs a configuration for performing wireless communication with the base station apparatus according to the tenth aspect.

According to this configuration, it is possible to prevent the directivity control performance from deteriorating due to an error during A / D conversion.

[0038] The receiving method according to the twelfth aspect of the present invention comprises:
A correction step of adjusting the reception level of each signal received by the plurality of antennas to an arbitrary value, and for each signal after this correction, a radio wave from a desired arrival direction is strong, and a radio wave from a direction other than the desired arrival direction is weak. A directivity setting step of performing a weighting synthesis process so as to be received.

According to this method, the reception levels of the antennas, which are supposed to be different from each other only in phase and should be the same, are aligned before the reception signal is weighted, and each reception level is adjusted by an error in A / D conversion. Since the directivity is set by the weighting process and the combining process after eliminating the effect of the non-uniformity of the non-uniformity, the directivity control by null formation can be accurately performed, and the deterioration of the unnecessary signal removing capability can be prevented.

A receiving method according to a thirteenth aspect of the present invention comprises:
In a twelfth aspect, in the correcting step, a reception level of each of the signals is adjusted to an average value.

According to this method, the reception levels of the respective antennas, which are supposed to have only the same phase but different phases, are adjusted to the average value before the received signal is weighted.
In order to remove the effect that each reception level becomes non-uniform due to an error at the time of / D conversion, the directivity is set by weighting processing and combining processing. Degradation can be prevented.

A receiving method according to a fourteenth aspect of the present invention comprises:
In a thirteenth aspect, the correction step includes a measurement step of measuring a reception level of each of the signals, an average value calculation step of calculating an average value of the reception levels of the measured signals,
A correction coefficient calculating step of calculating a correction coefficient for adjusting the reception level of each signal to the average value, and a multiplying step of multiplying each signal by the calculated correction coefficient are provided.

According to this method, since each reception level can be multiplied by a correction coefficient to make each reception level equal to the average value, it is possible to prevent insufficient null formation due to an error in A / D conversion. In addition, unnecessary radio waves can be accurately removed.

A receiving method according to a fifteenth aspect of the present invention comprises:
In a fourteenth aspect, the correction coefficient calculation step includes a division step of dividing the average value by a reception level value of each of the signals.
Alternatively, there is provided a multiplication step of calculating a reciprocal of the reception level value of each of the signals and multiplying the reciprocal by the average value.

According to this method, since the ratio of each reception level to the average value can be calculated, a correction coefficient to be multiplied to make each reception level equal to the average value can be calculated.

A receiving method according to a sixteenth aspect of the present invention comprises:
In a fourteenth aspect or a fifteenth aspect, the correction step includes a subtraction step of subtracting a reception level value of each signal and the average value from each other, and a threshold value obtained by previously setting an absolute value of the subtraction result. And a control step of performing control such that only the reception level of a signal whose absolute value of the subtraction result is lower than the threshold value is input to the average value calculation step. did.

According to this method, it is possible to improve the average value calculation accuracy by not using the reception level value of the received signal whose reception level value is significantly different from that of another antenna in the averaging process. The direction of the unnecessary radio wave can be accurately estimated and removed.

A receiving method according to a seventeenth aspect of the present invention comprises:
In any one of the fourteenth aspect to the sixteenth aspect, the correction step includes a time averaging unit step of performing a time averaging process on an output of the average value calculation step.

According to this method, the average value calculation accuracy can be improved by time-averaging the average value of each reception level, so that the direction of the unnecessary radio wave can be accurately estimated and removed. .

A receiving method according to an eighteenth aspect of the present invention comprises:
In a twelfth aspect, the correction step corrects the reception level of each signal to a reception level at which the variance of each reception level becomes equal.

According to this method, since the variance of each reception level can be made equal by multiplying each reception level by the correction coefficient, it is possible to prevent the null formation from becoming insufficient due to an error at the time of A / D conversion. In addition, unnecessary radio waves can be accurately removed.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1) The receiving apparatus according to the present embodiment is arranged such that the reception level of a received signal after A / D conversion is adjusted to an average value of each reception level.

Hereinafter, the receiving apparatus according to the present embodiment will be described using FIG. 1 and FIG. FIG. 1 is a main block diagram illustrating a schematic configuration of a receiving apparatus according to Embodiment 1 of the present invention, and FIG. 2 is a schematic configuration of a correction coefficient calculating unit of the receiving apparatus according to Embodiment 1 of the present invention. FIG.

In FIG. 1, antennas 101 and 102
Receives the signal propagated by the radio wave and outputs the signal to the A / D converter 103.
And 104 convert the analog signal received at the antenna into a digital signal.

The correction coefficient calculating means 105 calculates the average value of the reception levels of the outputs of the A / D converters 103 and 104, and calculates a correction coefficient for adjusting each reception level to the average value. Multipliers 106 and 107 multiply the received signal after the A / D conversion by the correction coefficient determined by correction coefficient calculating means 105, and make the reception level of each antenna uniform to the average value.

The weighting factor controller 108 determines the weighting factor in the weighting by the maximum ratio combination, and the multipliers 109 and 110 multiply the received signal after the correction processing by the weighting factor determined by the weighting factor controller 108. Together
Weighting is performed and directivity is set.

The adder 111 combines the received signals after weighting, and the propagation path distortion compensator 112 estimates and compensates for the distortion of the radio wave given along the route of radio wave propagation.

Detector 113 performs detection processing on the received signal after distortion compensation to obtain received data. Multiplier 11
4 multiplies the propagation path distortion information output from the propagation path distortion compensator 112 by the received data output from the detector 113.

The multiplier 114 multiplies the received signal after the distortion compensation processing by the received signal after the detection processing.

The subtractor 115 subtracts the output of the adder 111 and the output of the multiplier 114, and uses the subtraction result as a parameter for updating / determining a weighting factor for maximum ratio combining of each received signal. Output to the coefficient controller 108.

Next, the operation of the receiving apparatus having the above configuration will be described.

The received signals received by the antennas 101 and 102 are converted from analog signals to digital signals by A / D converters 103 and 104,
By 06 and 107, the correction coefficient calculated by the correction coefficient calculation means 105 is multiplied, and each reception level is adjusted to the average value.

The received signals whose reception levels are uniform are weighted by multipliers 109 and 110 based on the weighting factor calculated by weighting factor controller 108, the directivity is set, and synthesized by adder 111.

The combined received signal is compensated for distortion given to the received signal in the middle of radio wave propagation by the propagation path distortion compensator 112, and is subjected to detection processing by the detector 113 to become received data.

The distortion information output from the channel distortion compensator 112 is multiplied by the received data by the multiplier 114.
The result of the multiplication is added to the adder 111 by the subtractor 115.
Output and subtraction processing. The result of the subtraction is used as a parameter for setting a weighting factor by the weighting factor controller 108.
Is input to

Next, the configuration and operation of the correction coefficient calculating means 105 will be described with reference to FIG.

In FIG. 2, level measuring units 201 and 2
02 calculates the reception level of each antenna which is the output of the A / D converters 103 and 104, and calculates an average value calculation unit 203.
Calculates the average value of each reception level, and calculates the reciprocal
And 205 calculate the reciprocal of each reception level, and
06 and 207 multiply the average value of all the reception levels output from the average value calculation unit 203 by the reciprocal of each reception level output from the reciprocal calculation units 204 and 205, and calculate each reception level by the average value. Calculate a correction coefficient for aligning with.

As described above, according to the present embodiment, the average value of each reception level is calculated, each reception level is multiplied by the correction coefficient, and each of the reception levels before the directivity is set by the weighting process and the combining process. Since the reception level is made equal to the average value and the influence of the error at the time of A / D conversion is removed, directivity control by null formation can be accurately performed, and deterioration of unnecessary signal removal capability can be prevented.

The average value calculation unit 2 according to this embodiment
For 03, only the reception level of a specific antenna may be used. In this case, a simpler circuit configuration can be used.

(Embodiment 2) The receiving apparatus according to the present embodiment has a configuration similar to that of Embodiment 1, except that a reception level significantly different from the average value is not used in the average value calculation processing. Things.

Hereinafter, the receiving apparatus according to the present embodiment will be described with reference to FIG. FIG. 3 is a main block diagram showing a schematic configuration of the correction coefficient calculating means of the receiving apparatus according to Embodiment 2 of the present invention. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

The subtractors 301 and 302 subtract the outputs of the level determination units 201 and 202 and the output of the average calculation unit 203, respectively, and then threshold value determination units 303 and 304.
Determines the subtraction result as a threshold value, and determines whether each reception level is a numerical value falling within a certain range above and below the average value.

The results of the determination by the threshold value determination units 303 and 304 control the switching of the switches 305 to 308, respectively.

That is, if each reception level is a value falling within a certain range above and below the average value, the switches 305 and 306 output the outputs of the multipliers 206 and 207 to the multiplier 10.
6 and 107, and switches 307 and 308 output the outputs of the level measurement units 201 and 202 to the average value calculation unit 20.
Output to 3.

On the other hand, if any of the reception levels has a value that does not fall within a certain range above and below the average value, for example, the reception level of the antenna 101 does not fall within a certain range above and below the average value. If there is, switch 30
Reference numeral 7 does not output the output of the level measurement unit 201 to the average value calculation unit 203, and the switch 305 outputs a predetermined constant.

When the reception level returns from the average value to a value within a certain range, the switch 307 switches the level measurement unit 2
01 is output to the average value calculation unit 203 and the switch 3
05 outputs the output of the multiplier 206.

As described above, according to the present embodiment, the reception level of a reception signal whose reception level value is significantly different from that of another antenna, for example, a reception signal whose reception level is significantly lowered due to the influence of noise or the like, is obtained. By not using the value in the averaging process, the average value calculation accuracy can be improved, so that the direction of the unnecessary radio wave can be accurately estimated and removed.

(Embodiment 3) The receiving apparatus according to the present embodiment has a configuration similar to that of Embodiment 1, except that it performs a time averaging process on the average value of each reception level.

Hereinafter, the receiving apparatus according to the present embodiment will be described with reference to FIG. FIG. 4 is a main part block diagram showing a schematic configuration of a correction coefficient calculating unit of the receiving apparatus according to Embodiment 3 of the present invention. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

In FIG. 4, the time average calculating section 401
For example, a time constant weighted averaging or the like is performed on the average value of each reception level, which is the output of the average value calculation unit 203, to obtain a time average.

As described above, according to the present embodiment, the average value calculation accuracy can be improved by performing the time averaging process on the average value of each reception level, so that the direction of the unnecessary radio wave can be accurately estimated. , Can be removed.

(Embodiment 4) The receiving apparatus according to the present embodiment is to equalize the variances of the respective reception levels when adjusting the reception levels of the received signals after A / D conversion.

Hereinafter, the receiving apparatus according to the present embodiment will be described with reference to FIG. FIG. 5 is a main block diagram showing a schematic configuration of the correction coefficient calculating means of the receiving apparatus according to Embodiment 4 of the present invention. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

The variance calculation units 501 and 502 calculate the variance of the outputs of the level measurement units 201 and 202, respectively.
Appropriate value calculation section 503 calculates and outputs a reception level value such that the variance of each reception level becomes equal.

As described above, according to the present embodiment, the variance of each reception level is calculated, and the variance of each reception level before weighting is equalized by multiplying each reception level by the correction coefficient. The influence of the time error can be removed, and the deterioration of the unnecessary signal removing ability can be prevented.

[0087] In the first to fourth embodiments, the case where the number of antennas of the receiving apparatus is 2 has been described. However, the present invention can be applied to the case where the number of antennas is other than 2.

In implementing the present invention, the values to be aligned can be arbitrarily determined as long as the reception levels of the received signals after A / D conversion are the same, and the values to be aligned are the respective reception levels described in the above embodiment. Are not limited to values having the same average value and variance.

[0089]

As described above, according to the present invention,
By adjusting the reception levels of the received signals before the directivity of the received signals after the A / D conversion is set by the weighting process, it is possible to prevent the null formation from becoming insufficient due to an error during the A / D conversion, Accurate directivity control can be performed.

[Brief description of the drawings]

FIG. 1 is a main block diagram showing a schematic configuration of a receiving apparatus according to Embodiment 1 of the present invention.

FIG. 2 is a main block diagram showing a schematic configuration of a correction coefficient calculating unit of the receiving apparatus according to Embodiment 1 of the present invention.

FIG. 3 is a main block diagram showing a schematic configuration of a correction coefficient calculating unit of the receiving apparatus according to Embodiment 2 of the present invention.

FIG. 4 is a main block diagram showing a schematic configuration of a correction coefficient calculating unit of the receiving apparatus according to Embodiment 3 of the present invention.

FIG. 5 is a main block diagram showing a schematic configuration of a correction coefficient calculating unit of the receiving apparatus according to Embodiment 4 of the present invention.

FIG. 6 is a main block diagram showing a schematic configuration of a conventional receiving apparatus.

FIG. 7 is a schematic diagram showing a reception directivity pattern;

[Explanation of symbols]

 105 Correction coefficient calculation means 108 Weight coefficient controller 203 Average value calculation section 204, 205 Reciprocal calculation section 303, 304 Threshold value determination section 401 Time average calculation section 501, 502 Variance calculation section 503 Appropriate value calculation section

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04B 7/26 H04B 7/26 B (72) Inventor Minako Takeishi 4--3 Tsunashima Higashi, Kohoku-ku, Yokohama-shi, Kanagawa No. 1 Matsushita Communication Industrial Co., Ltd. F term (reference) 5J021 AA02 AA03 AA04 AA05 AA06 CA06 EA04 FA14 FA16 FA20 FA25 FA26 FA29 FA32 GA01 GA06 HA05 HA10 5K052 AA01 BB02 CC06 DD04 EE13 EE17 FF29 5K059 CC03 CC06 DD01 AG01 BE06 5K067 AA03 BB02 CC24 DD51 EE02 EE10 KK02 KK03

Claims (18)

[Claims] 1. A correction means for adjusting the reception level of each signal received by a plurality of antennas to an arbitrary value, and a radio wave from a desired arrival direction is strong for each signal after the correction.
A receiving unit comprising: a directivity setting unit that performs weighting synthesis processing such that radio waves from directions other than the desired direction of arrival are weakly received. 2. The receiving apparatus according to claim 1, wherein said correction unit adjusts a reception level of each of the signals to an average value. 3. The signal processing apparatus according to claim 1, wherein the correction unit is configured to measure a reception level of each signal, an average value calculation unit that calculates an average value of the measured reception levels of each signal, and a reception level of each signal. 3. The receiving apparatus according to claim 2, further comprising: a correction coefficient calculation unit that calculates a correction coefficient for adjusting the signal to the average value; and a multiplication unit that multiplies each of the signals by the calculated correction coefficient. 4. The correction coefficient calculation unit calculates a reciprocal of the reception level value of each signal or a division unit that divides the average value by a reception level value of each signal, and calculates each reciprocal number and the average value of the reception level value of each signal. The receiving device according to claim 3, further comprising: a multiplying unit that multiplies the value by a value. 5. A subtraction section for subtracting a reception level value of each signal and the average value from each other, and a threshold value of an absolute value of a result of the subtraction is determined by a predetermined threshold value. 4. The control device according to claim 3, further comprising: a determination unit; and a control unit configured to control such that only a reception level of a signal whose absolute value of the subtraction result is lower than the threshold value is input to the average value calculation unit. Or the receiving device according to claim 4. 6. The reception device according to claim 3, wherein the correction unit includes a time averaging unit that performs a time averaging process on an output of the average value calculation unit. apparatus. 7. The receiving apparatus according to claim 1, wherein said correction means corrects the reception level of each signal to a reception level at which the variance of each reception level becomes equal. 8. A communication terminal device comprising the receiving device according to claim 1. Description: 9. A base station apparatus for performing wireless communication with the communication terminal apparatus according to claim 8. 10. A base station apparatus comprising the receiving apparatus according to claim 1. Description: 11. A communication terminal device for performing wireless communication with the base station device according to claim 10. 12. A correction step of adjusting reception levels of signals received by a plurality of antennas to an arbitrary value, and a radio wave from a desired arrival direction is strong for each signal after the correction, and a signal other than the desired arrival direction is provided. A directivity setting step of performing a weighting synthesis process so that the radio wave from the receiver is weakly received. 13. The receiving method according to claim 12, wherein said correcting step adjusts a reception level of each of said signals to an average value. 14. The correction step includes: a measurement step of measuring a reception level of each of the signals; an average value calculation step of calculating an average value of the reception levels of the measured signals; and a reception level of each of the signals. 14. The reception method according to claim 13, further comprising: a correction coefficient calculating step of calculating a correction coefficient for adjusting the signal to the average value; and a multiplying step of multiplying each of the signals by the calculated correction coefficient. 15. The correction coefficient calculating step includes a dividing step of dividing the average value by a reception level value of each of the signals, or
The receiving method according to claim 14, further comprising: a multiplication step of calculating a reciprocal of a reception level value of each of the signals and multiplying the reciprocal by the average value. 16. The correction step includes a subtraction step of subtracting a reception level value of each signal from the average value, and a threshold value determination of an absolute value of the subtraction result using a predetermined threshold value. The control method according to claim 14, further comprising: a determination step; and a control step of controlling only a reception level of a signal whose absolute value of the subtraction result is lower than the threshold value to be input to the average value calculation step. Or the receiving method according to claim 15. 17. The method according to claim 14, wherein the correcting step includes a time averaging unit step of performing a time averaging process on an output of the average value calculating step. Receiving method. 18. The receiving method according to claim 12, wherein said correcting step corrects a reception level of each signal to a reception level at which variance of each reception level becomes equal.