JP2001160772A - Reception device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve communication quality at the time of starting communication. SOLUTION: Channel estimation parts 11-1 to 11-N detecting a phase difference between respective pieces of signal data outputted from antenna elements 1-1 to 1-N and known pilot data, SIR calculation parts 12-1 to 12-N calculating the ratio of desired wave power to interference wave power (SIR) in respective pieces of signal data and a weight selection part 13 selecting initial weight making the phase difference detected by the respective channel estimation parts to be the phase of weight and SIR calculated by the SIR calculation parts to be the amplitude ratio of weight are included in the reception device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiver for adaptively controlling a weight by which each signal data output from a plurality of antenna elements is multiplied.

[0002]

2. Description of the Related Art Conventionally, as a receiving device for data communication,
One having a plurality of antenna elements has been devised. In this type of receiving apparatus, the phase and amplitude of the signal data of each element are multiplied by weights so that the gain of the azimuth of arrival of the desired wave is increased and the gain of the azimuth of the interference wave is reduced to receive only the desired wave. Control method.

FIG. 4 is a block diagram showing an example of a conventional receiving apparatus provided with N (N is an integer of 2 or more) antenna elements. The respective signal data output from the antenna elements 101-1 to 101-N are received by the receiver analog sections 102-1 to 102-1.
The signal is subjected to quadrature detection at 102-N and converted into complex data composed of an I signal and a Q signal (the I signal is a real part and the Q signal is an imaginary part). Then, the signals are converted into digital signals by A / D converters 103-1 to 103-N, and are output from multipliers 104-1 to 104-1.
4-N. These multipliers 104-1 to 104-1
The weights corresponding to the respective signal data output from the antenna elements 101-1 to 101-N are given to the 4-N from the weight control unit 109, and these weights are complexly multiplied by the respective signal data. . Antenna element 10
The signal data subjected to the above-described processing for each of the systems 1-1 to 101-N is combined by the combining unit 105.

Normally, signal data is composed of a portion of pilot data (received pilot data) having a predetermined data array known to the receiving side and an actual communication data portion unknown to the receiving side. Are consecutive. In the receiving apparatus shown in FIG. 4, the known pilot data (that is, pilot data having the same data arrangement as the received pilot data) is stored in pilot data storage section 110. In channel estimation section 106,
The received pilot data combined by combining section 105 and the known pilot data output from pilot data storage section 110 are sequentially compared and averaged, and the phase difference between the signal data and the known pilot data is detected. .
Since this phase difference occurs due to the influence of the transmission path, it is called a channel estimation value.

The complex conjugate of the channel estimation value is
By multiplying the unknown communication data by 07, demodulated data of the communication data can be obtained. Also, the received pilot data is multiplied by the complex conjugate of the channel estimation value by the multiplier 107, and the adder 108 obtains a difference from the known pilot data. This difference is calculated by multipliers 104-1 to 104-
An error of the weight given to N is output to the weight control unit 109 as an error signal. The weight control unit 109 optimizes and updates the weight based on the error signal and each signal data before weight multiplication. As described above, the method of controlling the weight based on the error signal is referred to as a minimum-mean-squared-error (MMS).
E) This is called adaptive weight control based on criteria.

A typical adaptive weight control algorithm is the LMS algorithm or the RLS algorithm, but the initial value of the weight, that is, the initial weight cannot be calculated by any of the algorithms. Therefore, conventionally, only one element system is “1” (the real part is “1” and the imaginary part is “0”), and all the remaining systems are “0”.
An initial weight that makes both the real part and the imaginary part “0” has been given to the weight control unit 109. In the receiving apparatus shown in FIG. 4, the above-described processing is repeated each time one piece of pilot data is received, so that the initial weight gradually changes toward the optimum weight, and finally converges to the optimum weight.

[0007]

However, when the initial weight as described above is set, the weight "0" is set.
, The weight must be updated many times before the initial weight converges to the optimal value. Although the number of updates required until convergence varies depending on the situation, for example, the RLS algorithm also requires at least 10 data updates. Therefore, it takes time for the convergence of the adaptive weight control based on the MMSE criterion, so that the communication quality at the start of communication is low, and it takes a long time until the communication quality rises to the highest level. Even if the initial weight "0" is made slightly larger than "0" in order to improve this problem, the weight error is still large from the beginning.
It was not a fundamental solution to the problem.

[0008] In the case of mobile communication, the relative azimuth with the communication partner changes every moment. However, the conventional receiving apparatus shown in FIG. 4 cannot cope with a rapid change in the relative azimuth because the convergence of the adaptive weight control based on the MMSE standard takes time as described above. Therefore, the beam nose due to the weight deviates from the actual azimuth of arrival of the radio wave, so that the communication quality is remarkably deteriorated, and the communication may be disconnected. Even in this problem, it takes a long time for convergence of adaptive weight control, which is a fundamental factor. Therefore, it becomes a serious problem common to all receivers having a plurality of antenna elements and to which adaptive weight control is applied. ing.

The present invention has been made to solve such a problem, and an object of the present invention is to improve communication quality at the start of communication. Another object is to reduce the time required from the start of communication until the communication quality rises to the highest level. Another object is to maintain communication quality that can withstand at least even when the receiving direction changes rapidly during mobile communication.

[0010]

According to the present invention, there is provided a pilot data storage unit for outputting second pilot data having the same arrangement as the first pilot data included in each signal data. By comparing the first pilot data portion of each signal data with the second pilot data which is connected to the output side of each antenna element and connected to the output side of the pilot data storage section, respectively. A plurality of channel estimators for detecting and outputting a phase difference between the signal data and the second pilot data, respectively, and each signal estimator connected to the output side of these channel estimators and based on the output of each channel estimator. A plurality of desired signal power to interference wave power ratio calculation sections for calculating and outputting desired signal power to interference wave power ratios, respectively, and each channel estimation And each of the phase differences detected at each channel estimating unit connected to the output side of each desired signal power to interference wave power ratio calculating unit is used as the phase of the weight, and at each desired signal power to interference wave power ratio calculating unit. A weight selection unit that selects an initial weight that sets each of the calculated desired signal power to interference wave power ratio as an amplitude ratio of the weight and multiplies each signal data. Further, the present invention, an error signal generation unit that detects an error of the weight based on each signal data multiplied by the weight and outputs it as an error signal,
A weight generator connected to the output side of the error signal generator and connected to the input of the weight selector and updating the weight based on the error signal and outputting the updated weight to the weight selector. And means for selecting a weight output from the weight generation unit and multiplying each signal data. Further, according to the present invention, the weight selecting unit detects a difference between two weights of the relative phase difference between the antenna elements based on the weight output from the weight generating unit and the weight obtained from the output of each channel estimating unit. And means for initializing a weight by which each signal data is multiplied by selecting an initial weight when the difference is equal to or greater than a predetermined value. Further, according to the present invention, the weight selecting section sequentially calculates absolute values of the error signals sequentially output from the error signal generating section and calculates an average value of these absolute values, and the average value is equal to or more than a predetermined value. Means for initializing weights by which each signal data is multiplied by selecting an initial weight.

With this configuration, since a weight close to the optimum value can be applied as an initial weight from the beginning, the communication quality at the start of communication can be improved. Further, since the number of weight updates required until the initial weight converges to the optimum value can be reduced, the convergence time can be extremely shortened. Therefore, the time required from the start of communication until the communication quality rises to the highest level can be reduced. Also, in mobile communication, if the weight of the adaptive weight control cannot correspond to the receiving direction, it is determined as such, the initial weight described above is selected and the weight is initialized. Can maintain the communication quality that can withstand at least even when abruptly changes.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. (First Embodiment) FIG. 1 is a block diagram showing a configuration of a first embodiment of a receiving apparatus according to the present invention. The receiving apparatus shown in this figure is a receiving apparatus including N (N is an integer of 2 or more) antenna elements 1-1 to 1-N, and further includes receiving analog sections 2-1 to 2-N. , A / D conversion units 3-1 to 3-N, multipliers 4-1 to 4-N, and synthesis unit 5
, Channel estimator 6, multiplier 7, adder 8, weight generator 9, pilot data storage 10, channel estimators 11-1 to 11-N, and SIR calculator 12
-1 to 12-N and a weight selection unit 13.

Each system of the antenna elements 1-1 to 1-N includes:
Receiving device analog sections 2-1 to 2-N and A / D conversion sections 3-1 to 3-N are provided, respectively. The receiving device analog units 2-1 to 2-N include antenna elements 1-1 to 1-N
This is a general term for a configuration for performing analog processing on each signal data output from the device, and includes a band-pass filter, a detector, and the like. Also, the A / D converters 3-1 to 3-
N converts each signal data passing through the analog units 2-1 to 2-N into a digital signal.

Each of the multipliers 4-1 to 4-N connected to each system of the antenna elements 1-1 to 1-N has two inputs, one of which is an A / D converter 3-. The other input is connected to the output side of the weight selection unit 13. These multipliers 4-
1 to 4-N complex-multiply each signal data output from the A / D converters 3-1 to 3-N by the weight given from the weight selector 13. The synthesizing unit 5 is connected to the output side of each of the multipliers 4-1 to 4-N, and synthesizes the signal data multiplied by the weight in each of the multipliers 4-1 to 4-N. is there. The combination means to perform a complex addition mathematically.

On the other hand, the signal data includes a part of pilot data (received pilot data as first pilot data) having a predetermined data arrangement known to the receiving side and a part of actual communication data unknown to the receiving side. And the alternate array units are continuous. The pilot data storage unit 10 is configured by a memory or the like, and stores and outputs the known pilot data (second pilot data having the same data array as the received pilot data).

The channel estimator 6 has two inputs, one of which is connected to the output of the combiner 5,
The other input is connected to the output side of the pilot data storage unit 10. The channel estimating unit 6 sequentially compares and averages the received pilot data synthesized by the synthesizing unit 5 and the known pilot data output from the pilot data storage unit 10 to calculate the signal data and the known pilot data. This is to detect a channel estimation value which is a phase difference. Mathematically, the two are compared by multiplying the received pilot data by the complex conjugate of the known pilot data.

The multiplier 7 has two inputs. One input is connected to the output side of the synthesizing section 5 and the other input is connected to the output side of the channel estimating section 6. The multiplier 7 multiplies the signal data synthesized by the synthesis unit 5 by a complex conjugate of the channel estimation value obtained by the channel estimation unit 6. Thus, demodulated data of the communication data can be obtained from the unknown communication data portion of the signal data.

The output side of the multiplier 7 is divided into two branches, one of which is connected to the adder 8. This adder 8 is 2
One input is connected to the output side of the multiplier 7, and the other input is connected to the output side of the pilot data storage unit 10. The adder 8 calculates the difference between the product of the synthesized received pilot data multiplied by the complex conjugate of the channel estimation value and the known pilot data. This difference is calculated by the multipliers 4-1 to 4-
N represents the error of the weight given to N and is output as an error signal. Note that the combining unit 5, the channel estimating unit 6, the multiplier 7, and the adder 8 constitute an error signal generating unit.

The weight generation section 9 is connected to the output side of the adder 8 and also has an A / D conversion section 3-1 to 3-
N is connected to the output side. This weight generator 9
Is for optimizing and updating weights based on the error signal output from the adder 8 and each signal data before weight multiplication. Here, as an algorithm of adaptive weight control based on the MMSE standard, an LMS algorithm, an RLS algorithm, or the like can be used.

Further, each system of the antenna elements 1-1 to 1-N includes a channel estimator 11-1 to 11-N and an SI
R calculation units 12-1 to 12-N are provided, respectively. The channel estimating units 11-1 to 11-N have two inputs, and one input is an A / D converting unit 3-1 to 3-N
And the other input is connected to the output side of the pilot data storage unit 10. The processing contents of these channel estimation units 11-1 to 11-N are the same as those of the above-described channel estimation unit 6. That is, A / D
The received pilot data output from the conversion units 3-1 to 3-N and the known pilot data are sequentially compared and averaged, and a channel estimation value which is a phase difference between each signal data and the known pilot data is calculated. It is to detect. The difference between the channel estimating units 11-1 to 11-N and the channel estimating unit 6 is simply whether the signal data is before or after the signal data is combined.

The SIR calculators 12-1 to 12-N are connected to the output sides of the channel estimators 11-1 to 11-N, respectively. These SIR calculators 12-1 to 12-N
Is the original data for calculating the channel estimation value before averaging the interference wave power (i.e., the reception pilot data and the known pilot data are used as the square of the channel estimation values detected by the channel estimation units 11-1 to 11-N). The desired signal power / interference signal power is obtained by subtracting the desired signal power from the root mean square of the value obtained by multiplying the complex data of the pilot data by the complex conjugate. The SIR calculators 12-1 to 12-N output the values of (desired wave power / interference wave power) obtained as SIRs together with the channel estimation values.

The weight selector 13 is provided with the SIR calculator 12
-1 to 12-N and the output side of the weight generation unit 9, and are connected to the input sides of the multipliers 4-1 to 4-N of each system. The weight selection unit 13 performs the SIR
The weights selected from the outputs of the calculators 12-1 to 12-N or the weights output from the weight generator 9 are selected and output to the multipliers 4-1 to 4-N.

At the start of communication, the weight selecting section 13 sets the channel estimation values detected by the channel estimating sections 11-1 to 11-N of each system to the phase of the weight, and the SIR calculating section 12-N of each system. Each SI calculated from 1 to 12-N
Select an initial weight that makes R an amplitude ratio of the weight. At this time, it is usual to normalize the amplitude ratio of the weights so that the maximum value is 1, but there are cases where the normalization is not performed. In the case of normalization, the weight amplitude ratio of the system having the largest SIR is set to 1, and the weight amplitude ratio of the other systems is set to (own SIR / maximum SIR). By combining the amplitude ratio normalized in this way with the phase obtained from the channel estimation value, the antenna elements 1-1 to 1-1-
The initial weight of each system of N is obtained. The output side of the weight selection unit 13 is connected to the weight generation unit 9, and also outputs the initial weight thus obtained to the weight generation unit 9. In the weight generator 9, the initial weight is used for updating the weight.

In addition, the weight selecting section 13 has means for determining whether or not the weight of the adaptive weight control can correspond to the receiving direction at the time of mobile communication. This determination is based on the weights output from the weight generation unit 9 and the weights (phases of the above-described initial weights) obtained from the outputs of the channel estimation units 11-1 to 11-N.
The difference between the two weights regarding the relative phase difference between the systems 1 to 1-N is detected, and the determination is made based on whether or not the difference is equal to or greater than a predetermined value. The “relative phase difference between the respective systems of the antenna elements 1-1 to 1-N” referred to here is, for example, based on the system of the antenna element 1-1 and the respective systems of the antenna elements 1-2 to 1-N. It shows a value obtained by subtracting the phase of the system of the antenna element 1-1 from the phase. The “difference between weights” is obtained by subtracting the relative phase difference between these systems between the weights. If at least one of these differences is greater than or equal to a predetermined value, the processing is switched to the same processing as that at the start of communication, and the weight is initialized by selecting an initial weight.

Next, an operation when the receiving apparatus shown in FIG. 1 is used for mobile data communication having a rapidly changing receiving direction will be described. The operation of the weight selector 13 will be described with reference to FIG. Antenna element 1-1-1
Each of the signal data output from -N is subjected to quadrature detection in the analog sections 2-1 to 2-N of the receiving device, and is converted into complex data composed of an I signal and a Q signal (where the I signal is a real part, Signal is an imaginary part). Then, the signals are converted into digital signals by the A / D converters 3-1 to 3-N. In the case of spread spectrum communication, although the signal data is despread after A / D conversion, there is no difference in processing in the configuration of FIG.

The signal data converted into digital signals by the A / D converters 3-1 to 3-N are converted into channel estimators 11-1 to 11-N and a multiplier 4--1 provided for each system. 1 to 4-N. Channel estimation unit 11
In -1 to 11-N, a channel estimation value which is a phase difference between each signal data received by the antenna elements 1-1 to 1-N and known pilot data output from the pilot data storage unit 10 is detected. You. Channel estimation units 11-1 to 11-1
From 11-N, together with the channel estimation value detected here, the original data for calculating the channel estimation value (ie,
The value obtained by multiplying the received pilot data by the complex conjugate of the known pilot data) is calculated by the SIR calculation units 12-1 to 12-12.
−N. SIR calculators 12-1 to 12-1
In 2-N, the SIR of each signal data received by the antenna elements 1-1 to 1-N is calculated based on the channel estimation value and its original data.

The SIRs obtained by the SIR calculators 12-1 to 12-N are used together with the channel estimation values in the SIR calculators 1-1 to 12-N.
From 2-1 to 12-N are input to the weight selection unit 13 (step S1 in FIG. 2). At the start of communication, there is no input of a weight from the weight generation unit 9 to the weight selection unit 13 (step S2 in FIG. 2: NO), so that the weight selection unit 13 uses the channel estimation units 11-1 to 11- of each system. N
The initial weights are selected such that the channel estimation values detected in step (1) are used as the weight phases, and the SIRs calculated by the SIR calculation units 12-1 to 12-N of the respective systems are used as the amplitude ratios of the weights. . The initial weights thus obtained correspond to the respective signal data received by the antenna elements 1-1 to 1-N, respectively, and are close to the optimum values of the weights. This initial weight is determined by the multiplier 4-1 of each system.
4 to N, and also output to the weight generation unit 9 (step S3 in FIG. 2).

On the other hand, in multipliers 4-1 to 4-N, A / D
Each signal data output from the conversion units 11-1 to 11-N is subjected to complex multiplication by the initial weight given from the weight selection unit 13. Thereafter, each signal data is synthesized by the synthesizing unit 5. The signal data combined by the combining unit 5 is output to the channel estimating unit 6 and the multiplier 7. Channel estimation section 6 detects a channel estimation value which is a phase difference between received pilot data included in the signal data and known pilot data output from pilot data storage section 10.

In the multiplier 7, the complex signal data is multiplied by the complex conjugate of the channel estimation value. Here, when the unknown communication data included in the signal data is multiplied by the complex conjugate of the channel estimation value, demodulated data of the communication data can be obtained. This demodulated data is finally demodulated into data of “1” or “0” by phase determination. For example, in the case of BPSK modulation, there are two values of “1” and “0”, and in the case of QPSK modulation, “00”, “01”, “1”.
It has four values of "0" and "11". Further, when the received pilot data included in the signal data is multiplied by the complex conjugate of the channel estimation value by the multiplier 7 and the difference from the known pilot data is calculated by the adder 8, the multipliers 4-1 to 4-1 4
An error signal representing the error of the weight given to −N is obtained. The weight generation unit 9 optimizes and updates the initial weight given from the weight selection unit 13 based on the error signal and each signal data before weight multiplication.

The weight updated by the weight generator 9 is input to the weight selector 13 (step S4 in FIG. 2). Then, when the new channel estimation value and the SIR are input to weight selection section 13 (step S in FIG. 2).
1) Since the updated weight has been input from the weight generator 9 (step S2 in FIG. 2: YES), the weight selector 13 calculates the weight from the weight generator 9 and the weight obtained from each channel estimation value. Thus, the difference between the two weights regarding the relative phase difference between the respective systems of the antenna elements 1-1 to 1-N is detected (step S in FIG. 2).
5).

When all of these differences are smaller than the predetermined value (step S6 in FIG. 2: YES), it is determined that the weight of the adaptive weight control can correspond to the receiving direction, and the weight generator 9 outputs the weight. The selected weight is selected and given to multipliers 4-1 to 4-N of each system (FIG. 2).
Step S7). Thereafter, the same processing as described above is repeatedly performed by the multipliers 4-1 to 4-N, the combining unit 5, the channel estimating unit 6, the multiplier 7, the adder 8, the weight generating unit 9, and the weight selecting unit 13. Each time, the weight is updated by the weight generation unit 9. However, since the initial weight selected by the weight selection unit 13 at the start of communication is close to the optimum value of the weight, the initial weight converges to the optimum weight by updating several times (or at least once).

Also, because the receiving direction has changed abruptly,
If at least one of the differences between the weights detected in step S5 of FIG. 2 is larger than a predetermined value (step S6 of FIG. 2: NO), the weight of the adaptive weight control can correspond to the reception direction. The weight selection unit 13 determines that there is no communication, and the weight selection unit 13 is switched to the same processing as when communication starts. Then, the weight is initialized by selecting the above-described initial weight. This initial weight is used in the same way as at the start of communication, for each system
1 to 4-N and also output to the weight generation unit 9 (step S3 in FIG. 2), and the weight is updated from the next time based on the initial weight.

Although the receiving apparatus shown in FIG. 1 performs processing without considering a multipath delayed wave, it performs exactly the same processing as this receiving apparatus by the number of multipath delayed waves. A form in which multi-pass synthesis is performed is also conceivable. This multi-pass combining is called RAKE combining. Basically, this configuration can be configured by providing the receiving devices shown in FIG. 1 in parallel by the number of multipaths and providing a combining unit for performing multipath combining at the subsequent stage of each receiving device. However, nothing changes in the basic processing of the receiving device.

(Second Embodiment) FIG. 3 is a block diagram showing a configuration of a receiving apparatus according to a second embodiment of the present invention. In this figure, the same parts as those in FIG. The difference between the receiving apparatus shown in this figure and the receiving apparatus shown in FIG. 1 lies in a method of determining whether or not the weight of the adaptive weight control can cope with a fluctuating receiving direction. The weight selector 13A shown in FIG. 3 is also connected to the output side of the adder 8,
The error signals sequentially output from the adder 8 are input to the weight selection unit 13A. This weight selecting unit 13A
Even during the weight update, the absolute values of the input error signals are sequentially calculated, and the average of these absolute values is calculated. When the average value is equal to or larger than a predetermined value, the weight is initialized by switching to the same processing as that at the start of communication and selecting an initial weight.

The error signal directly represents the error of the weight given to the multipliers 4-1 to 4-N. For this reason, when the average value of the error signal becomes equal to or more than a predetermined value, the weight cannot be applied, which is a factor for initialization. The average value of the absolute value of the error signal may be a simple average in a past fixed section. Shortening the average interval has the advantage that it can respond to sudden changes,
The possibility of erroneous detection also increases. For this reason, it is usual to take an average section of a certain length. The weight selection unit 13A shown in FIG. 3 performs the processing shown in FIG. 1 except for the method of determining whether the weight described above can correspond to the reception direction.
Is the same as the weight selection unit 13 shown in FIG.

[0036]

As described above, according to the present invention, a channel estimator and an SIR calculator are provided for each antenna element system, and an initial weight is formed based on the phase difference and SIR output from these channels. . As a result, a weight close to the optimum value can be applied from the beginning as the initial weight, so that the communication quality at the start of communication can be improved. Further, since the time required for the initial weight to converge to the optimum value can be extremely reduced, the time required from the start of communication until the communication quality rises to the highest level can be reduced.

Further, in the present invention, the weight selecting section determines two weights for the relative phase difference between the antenna elements based on the weight output from the weight generating section and the weight obtained from the output of each channel estimating section. The difference between
Based on this difference, it is determined whether the weight of the adaptive weight control can correspond to the receiving direction. Or,
The weight selector sequentially calculates the absolute value of the error signal indicating the error of the weight, and makes a similar determination based on the average of these absolute values. If the reception direction cannot be handled, the above-described initial weight is selected and the weight is initialized. As a result, even when the receiving direction changes rapidly in mobile communication, it is possible to maintain the communication quality that can withstand the minimum.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a first embodiment of a receiving device according to the present invention.

FIG. 2 is a flowchart showing an operation flow of a weight selection unit shown in FIG.

FIG. 3 is a block diagram showing a configuration of a second embodiment of the receiving apparatus according to the present invention.

FIG. 4 is a block diagram illustrating an example of a conventional receiving apparatus.

[Explanation of symbols]

1-1 to 1-N: Antenna element, 2-1 to 2-N: Receiver analog section, 3-1 to 3-N: A / D converter, 4-1
... 4-N, 7... Multiplier, 5...
1-N channel estimator, 8 adder, 9 weight generator, 10 pilot data storage, 12-1 to 12-12
-N: SIR calculation unit, 13, 13A: weight selection unit.

Claims (4)

[Claims] 1. A receiving apparatus for adaptively controlling a weight by which each signal data output from a plurality of antenna elements is multiplied, wherein a second pilot having the same arrangement as first pilot data included in each of the signal data is provided. A pilot data storage unit for outputting data, the first pilot data portion of each signal data being connected to the output side of each antenna element and connected to the output side of the pilot data storage unit, and A plurality of channel estimators for respectively detecting and outputting a phase difference between each of the signal data and the second pilot data by comparing the second pilot data with a second pilot data; A desired signal power to interference signal power ratio of each signal data connected based on the output of each channel estimator A plurality of desired wave power-to-interference wave power ratio calculation units for calculating and outputting the respective channel estimation units, and each of the channel estimation units being connected to an output side of the desired wave power-to-interference wave power ratio calculation unit Each of the phase differences detected by the section is defined as the phase of the weight, and the desired signal power to interference wave power ratio calculated by the desired signal power to interference wave power ratio calculation section is calculated by the amplitude of the weight. A weight selecting unit for selecting an initial weight to be a ratio and multiplying the signal data by the initial weight. 2. The receiving apparatus according to claim 1, wherein an error signal generating unit detects an error of the weight based on the signal data multiplied by the weight and outputs the error as an error signal. A weight generating unit connected to an output side of the unit and connected to an input side of the weight selecting unit and updating the weight based on the error signal and outputting the updated weight to the weight selecting unit. Comprises a means for selecting the weight output from the weight generating unit and multiplying the selected signal data by the weight. 3. The receiving device according to claim 2, wherein the weight selection unit is configured to perform a communication between each of the antenna elements using the weight output from the weight generation unit and the weight obtained from the output of each of the channel estimation units. Means for detecting a difference between the two weights with respect to a relative phase difference; and means for initializing the weights for multiplying the respective signal data by selecting the initial weights when the difference is equal to or greater than a predetermined value. A receiving device comprising: 4. The receiving apparatus according to claim 2, wherein the weight selection section sequentially calculates absolute values of the error signals sequentially output from the error signal generation section, and calculates an average value of these absolute values. And a means for initializing the weight by which the signal data is multiplied by selecting the initial weight when the average value is equal to or greater than a predetermined value.