JP3525880B2 - Receiver - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiver for data communication which adaptively weights and controls received data from an antenna having a plurality of elements, suppresses interference waves and receives desired waves. .

[0002]

2. Description of the Related Art As a receiver for suppressing an interference wave and receiving a desired wave, an antenna having a plurality of elements is used, and signal data from each antenna element is adaptively weight-controlled and combined. Receivers have been put to practical use.

FIG. 6 is a block diagram showing a conventional example of this type of receiving apparatus.

Here, the signal data D1, D2, ...
In Dn, the received signals of the plurality (n) of antenna elements are each quadrature-detected by a quadrature detection circuit (not shown) and I
It is complex signal data that has been converted into a signal (real part) and a Q signal (imaginary part) and then A / D converted by an A / D conversion circuit (not shown). In the case of spread spectrum communication, the complex signal data is A / D converted and then despread.

The signal data D1, D2, ..., Dn obtained from the reception signals of the plurality (n) of antenna elements are weights W1, W2 ,.
..., Wn is multiplied by circuits 1-1, 1-2, ..., 1-n
Are respectively subjected to complex multiplication to adjust the phase and the amplitude so that the desired signal level is maximized, and are combined by the combining unit 2. The term "synthesis" means
It is mathematically complex addition.

The signal data synthesized by the synthesizer 2 is
It is demodulated by the demodulation unit 3 and output as demodulated data Do. The signal data is composed of a pilot data part having a known data array and an actual communication data part, and is configured in slot units divided by a predetermined number of symbols.

The demodulation unit 3 calculates the phase shift caused by the transmission line (channel) and calculates the complex conjugate D of the channel estimation value.
A channel estimation circuit 31 that outputs c and a delay circuit (DL) 3 that gives a delay corresponding to the time for calculating the channel estimation value.
2 and a multiplication circuit 33 that multiplies the signal data output from the delay circuit 32 by the complex conjugate Dc of the channel estimation value.

Here, the channel estimation circuit 31 of the demodulation unit 3
Compares the received pilot data included in the output of the combining unit 2 with known pilot data Dp to detect a phase shift, and averages the number of pilot data symbols in the slot to calculate a channel estimation value. Then, the complex conjugate Dc of this channel estimation value is output. Since this phase shift is caused by the transmission line (channel), it is called a channel estimation value. Further, mathematically, the pilot data Dp known to the received pilot data is
It is obtained by multiplying the complex conjugate of.

The known pilot data Dp is generated, for example, by reading the pilot data previously stored in the memory, but illustration of the constituent elements is omitted.

The delay circuit 32 is set according to the time required for the channel estimation section 31 to calculate the channel estimation value, and delays the output signal data of the synthesis section 2 to match the timing.

The multiplication circuit 33 demodulates the signal data by multiplying the signal data output from the delay circuit 32 and the complex conjugate Dc of the channel estimation value output from the channel estimation circuit 31, and outputs the demodulated data Do. To do. The demodulated data Do contains the demodulated call data and pilot data.

Next, the adder circuit 4 compares the known pilot data Dp with the demodulated pilot data for each symbol and outputs the difference as error data De.

The weight controller 5 multiplies the signal data D1, D2, ..., Dn of each antenna element by the complex conjugate Dc of the channel estimation value (not shown).
And output data of these multiplication circuits and addition circuit 4
Based on the error data De output for each pilot data symbol, the minimum mean square error (Minimum Mean sq) is set so as to minimize the value of the error data De.
.., Wn are adaptively calculated and controlled according to a wared error (MMSE) standard.

As a method (algorithm) for determining the weight based on the least mean square error criterion, for example, based on known pilot data (reference signal), the square error component with the actually received pilot data is minimized. LMS (Least Mean) that determines the weight
Square method and RLS (RecursiveLe)
ast Square) method has been proposed.

By the way, since the weight control unit 5 cannot calculate each weight in the initial stage, as the initial value of the weight, for example, only the weight corresponding to one certain element is "1" (real part is 1, imaginary part). Is 0), the weights corresponding to all other elements are “0” (both the real part and the imaginary part are 0), and these initial values are set in advance.

After that, the weights are optimized based on the least mean square error criterion based on the signal data system of each antenna element and the error data De multiplied by the complex conjugate Dc of the channel estimation value. The weight is gradually changed toward the optimum value, and finally converges to the optimum weight value.

[0017]

In the above-mentioned conventional example,
It has the following problems.

The first problem is that the weight is calculated for each symbol by the adaptive algorithm based on the error data De output for each pilot data symbol, and the weight is applied to the next symbol for demodulation. There is a problem that the demodulation error is large during the period until the weights converge.

The second problem is that the weight varies considerably under the influence of noise, so that even if the weight seems to converge, it may actually change to an unstable weight. However, there is a problem that the demodulation error increases. In addition, when the noise increases rapidly, not only the demodulation error increases in a specific symbol, but also the weights are diverged in the adaptive algorithm, which may cause a significant demodulation error in the subsequent weight processing. is there.

An object of the present invention is to minimize demodulation errors during the period after the receiver is started up until the weights converge, and to reduce the weight instability due to the influence of noise as much as possible to minimize the demodulation errors. It is to reduce the weight and completely eliminate the weight divergence.

[0021]

The receiving apparatus of the present invention multiplies the signal data of each antenna element so that the value of error data indicating the difference between demodulated pilot data and known pilot data is minimized. A weight control unit for updating and outputting the weight for each symbol in the slot, a multiplication circuit for multiplying the signal data of each antenna element by the weight, a synthesizing unit for synthesizing the output data of these multiplying circuits, and this synthesizing unit. A demodulation unit for demodulating the output data of the unit, and an addition circuit for generating the error data by taking the difference between the demodulated pilot data included in the demodulation output data of the demodulation unit and the known pilot data. 1 slot for receiving the weight for each symbol output from the first receiving system and the weight control unit of the first receiving system , An optimum weight selecting means for selecting one of the optimum weights, a multiplication circuit for multiplying the signal data of each antenna element by the optimum weight, and a combination for combining output data of these multiplication circuits. And a demodulation section that demodulates the output data of the combining section and outputs the demodulated output data.

In the above structure, the optimum weight selecting means of the second receiving system receives the weight for each symbol output from the weight control section of the first receiving system and stores one slot in the memory. The beam pattern is calculated for each weight for each symbol stored in this memory, the peak azimuth at which the received power is maximum is detected for each calculated beam pattern, and the peak of the beam pattern of the optimum weight in the previous slot is detected. The azimuth difference from each azimuth is calculated, and the level difference from the received power of the other azimuths is averaged for all the azimuths with respect to the received power of the peak azimuth for each beam pattern in which the azimuth difference is within a certain value. Then, the average level difference is calculated respectively, and the weight corresponding to the beam pattern with the maximum average level difference is set as the optimum weight. To choose Te.

Specifically, a common work memory for storing one slot of the weight output for each symbol from the weight control unit of the first receiving system and temporarily storing the calculation result data in the optimum weight selection processing. And a beam pattern calculation unit that calculates received power in all directions based on the weight stored in the common work memory,
A peak azimuth detecting unit that detects a peak azimuth indicating a peak value of the received power for the beam pattern calculated for each symbol by the beam pattern calculating unit, and a peak azimuth of the beam pattern calculated from the optimum weight of the previous slot and A peak azimuth validity determining unit that compares the azimuth difference detected by the peak azimuth detecting unit and determines whether this azimuth difference is within a preset constant value, and the azimuth is determined by this peak azimuth validity determining unit. An average level difference calculation unit that finds and averages the level difference with respect to the received power of other directions based on the received power of the peak direction for each beam pattern for which the difference is determined to be within a certain value, and this average The average level difference of each beam pattern calculated by the level difference calculation unit is sequentially compared to find the maximum average level difference. And a weight selector for selecting weights corresponding to the beam pattern as the optimum weight.

The optimum weight selecting means of the second receiving system receives the weight for each symbol output from the weight control section of the first receiving system, stores one slot in the memory, and stores this memory. Beam pattern is calculated for each of the weights stored in
Based on the received power corresponding to the peak azimuth of the beam pattern of the optimum weight of the previous slot, the level difference from the received power in other directions is averaged for all directions to calculate the relative average level differences. The weight corresponding to the beam pattern that maximizes is selected as the optimum weight.

Specifically, a common one for storing one slot of the weight output for each symbol from the weight control unit 5 of the first receiving system and temporarily storing the calculation result data in the optimum weight selection processing. From the work memory, the beam pattern calculation unit that calculates the received power in all directions based on the weight stored in this common work memory, and the current weight corresponding to the peak direction of the beam pattern calculated from the optimum weight of the previous slot From the relative average level difference calculation unit that obtains and averages the level difference with the received power in other directions based on the received power in the same direction of the calculated beam pattern, and the weight of each symbol for one slot. The calculated relative average level difference is sequentially compared and the beam pattern corresponding to the maximum relative average level difference is obtained. It has a weight selection unit for selecting a weight as optimum weight, the peak azimuth detecting unit for detecting the peak direction of the beam pattern of the optimum weight.

Further, the optimum weight selecting means of the second receiving system receives the weight for each symbol output from the weight control section of the first receiving system, stores one slot in the memory, and this memory The weight of the last symbol of the slot may be selected as the optimum weight from the weights stored for each symbol.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention. Here, the difference from the conventional example is selected from the first receiving system having the same configuration as the conventional example shown in FIG. 6 and the weight for one slot calculated for each symbol in the first receiving system. A second receiving system is provided, which performs weight control of the signal data of each antenna element based on the optimum weight and demodulates the signal data.

By the way, the first receiving system has the same configuration as that of the conventional example shown in FIG. 6, and the same reference numerals as those of the components of FIG. 6 are given to the respective components.

That is, the first receiving system is the signal data D obtained from the received signals of the plurality (n) of antenna elements.
1, D2, ..., Dn, weights W11, W12, ..., W output from the weight control unit 5 for each symbol.
Multiplier circuits for multiplying 1n 1-1, 1-2, ..., 1-
n and the output data of the multiplication circuits 1-1, 1-2, ..., 1-n, a demodulation unit 3 that demodulates the signal data synthesized by the synthesis unit 2, Pilot data and known pilot data Dp are compared for each pilot data symbol, and the difference is compared to error data De.
, Dn of each antenna element are multiplied by the complex conjugate Dc of the channel estimation value, and the output data and the addition circuit 4 for each pilot data symbol are output. Based on the error data De output to the above, the minimum mean square error (Minimum
(Mean squared Error: MMSE)
Weights W11, W12, ... adaptively according to the standard
The weight control unit 5 calculates W1n for each symbol and performs weight control.

The demodulation data is not output to the outside in the first reception system, and the final demodulation data is output from the demodulation unit 9 of the second reception system. Detailed description of the first receiving system is omitted.

Next, the second receiving system will be described.

Referring to FIG. 1, the second receiving system includes signal data D1, D2, ... Of plural (n) antenna elements.
..., delay units 6-1 that give a predetermined delay to Dn, respectively.
6-2, ..., 6-n and delay units 6-1, 6-2 ,.
......, optimum weight selection means 1 for each output data of 6-n
Optimal weights W21, W22, output from 0 ...
..., multiplication circuits 7-1 and 7- for multiplying W2n, respectively.
2, ..., 7-n and multiplication circuits 7-1, 7-2 ,.
, 7-n output data, a demodulation unit 9 that demodulates the signal data synthesized by the synthesis unit 8 and outputs demodulated data Do, and a weight control unit of the first reception system. Weights W11 and W output from 5 for each symbol
, ..., W1n, one optimum weight is selected for each slot, and optimum weights W21, W22 ,.
..., optimum weight selection means 10 for outputting as W2n
It has and.

Here, the delay units 6-1, 6-2, ...
6-n, the optimum weight is selected by the optimum weight selecting means 10 in order to match the timing of the signal data input to the multiplication circuits 7-1, 7-2, ..., 7-n with the optimum weight. The signal data D1, D2, ...

The demodulation section 9 has the same structure as the demodulation section 3 of the first reception system and performs the same operation, so that the description thereof will be omitted.

The optimum weight selecting means 10 sets the weights W11, W12, ..., W1n which are sequentially updated for each symbol by the adaptive algorithm in the first receiving system to 1.
The slots are stored, and one of the optimum weights is selected and output as the optimum weights W21, W22, ..., W2n.

By providing such a second receiving system, the weight does not fluctuate under the influence of noise for each symbol as in the conventional case. Therefore, after the receiving apparatus is activated, the weight does not converge. During the period, the demodulation error can be reduced. In addition, since the weight is stable, it is possible to completely prevent the weight from becoming unstable and diverging as in the conventional case.

FIG. 2 is a block diagram showing a first embodiment of the optimum weight selecting means 10.

The optimum weight selection means 10 stores one slot of the weights W11, W12, ..., W1n output from the weight control unit 5 of the first reception system for each symbol, and selects the optimum weight. Common work memory 101 for temporarily storing calculation result data in
And weights W11, W12, ..., W for each symbol of the first receiving system stored in the common work memory 101.
A beam pattern calculation unit 102 that calculates received power in all directions based on 1n, and an azimuth indicating a peak value of received power for a beam pattern calculated for each symbol by the beam pattern calculation unit 102 (referred to as a peak azimuth). Peak azimuth detecting section 103 for detecting
And the peak azimuth of the beam pattern calculated from the optimum weight of the previous slot and the peak azimuth detected by the peak azimuth detection unit 103 are compared, and it is determined whether the difference is within a preset constant value. And the level of the received power of the peak azimuth and the received power of other azimuths for each beam pattern for which the difference between the peak azimuths is determined to be within a certain value by the peak azimuth validity determination unit 104. An average level difference calculation unit 105 that calculates and averages the differences in all directions, and an average level difference calculation unit 105
The average level differences of the beam patterns calculated by the above are sequentially compared, one beam pattern having the maximum average level difference is selected, and the weights corresponding to the selected beam pattern are optimal weights W21, W22 ,. …, W
A weight selection unit 106 that selects and outputs 2n, and a control unit 107 that controls each unit.

FIG. 3 is a flow chart showing the operation of the control unit 107 of the optimum weight selection means 10.

First, the control unit 107 outputs the weight W output for each symbol from the weight control unit 5 of the first receiving system.
11, W12, ..., W1n are received, and one slot is stored in the common work memory 101 (step 20).
1).

Next, the weights W11, W12, ..., W of the first receiving system stored in the common work memory 101.
1n is read out for each symbol and the beam pattern calculation unit 1
No. 02, and the received power is sampled at predetermined azimuth intervals for all directions to calculate the reception power by a known algorithm, and data indicating the reception power in all directions (referred to as a beam pattern) is stored in the common work memory 101 (step 202).

When the beam pattern calculation is completed for all the weights of each symbol in the slot, the beam patterns stored in the common work memory 101 are sequentially read out and supplied to the peak azimuth detecting section 103 so that the received power is The maximum orientation is detected and stored in the common work memory 101 (step 203).

Next, the peak azimuth detected by the peak azimuth detecting unit 103 is supplied to the peak azimuth validity determining unit 104, and the azimuth is compared with the peak azimuth of the beam pattern of the optimum weight of the previous slot stored in advance. The difference is calculated (step 204), and it is determined whether or not the azimuth difference is within a preset constant value (step 20).
5). If it is determined that the azimuth difference is within the fixed value, the "valid" flag is added to the corresponding beam pattern stored in the common work memory 101 (step 206). If it is determined that the azimuth difference exceeds a certain value, an "invalid" flag is added to the corresponding beam pattern stored in the common work memory 101 (step 207).

Normally, the peak azimuths do not significantly shift between slots.
It can be judged that the weight obtained by the adaptive algorithm is unstable due to noise. Therefore, by determining the peak azimuth in this way, the weight in an unstable state can be removed.

When the processing is completed for each symbol for one slot (step 208), the beam pattern to which the "valid" flag is added is read from the common work memory 101 and supplied to the average level difference calculation section 105, and the peak is calculated. Based on the received power of the azimuth, the level difference from the received power of the other azimuths is obtained and averaged for all the azimuths, and this average level difference is stored in the common work memory 101 in association with the corresponding beam pattern (step 209).

By calculating the average level difference in this way, even if the peak azimuth is not shifted, the average level difference becomes small if the weight is in an unstable state with many interference waves, and a stable state with few interference waves is obtained. Since the average level difference increases with the weight of, it is possible to distinguish between the weight in an unstable state with many interference waves and the weight in a stable state with few interference waves.

Finally, the average level difference of each beam pattern calculated by the average level difference calculating section 105 is read from the common work memory and compared by the weight selecting section 106, and the weight corresponding to the beam pattern having the maximum average level difference is weighted. And select one as the optimum weight,
The optimum weight and the peak azimuth of the weight are stored in the common work memory 101 (step 210). The peak azimuth corresponding to this optimum weight is used for determining the peak azimuth validity when the optimum weight is selected in the next slot.

FIG. 4 shows an example of data stored in the common work memory 101.

Here, a work area for weight evaluation and a work area for optimum weight of each symbol for one slot are provided.

The weight evaluation work area of each symbol stores the weight, beam pattern, peak azimuth, valid / invalid flag, and average level difference data of the first receiving system. The optimum weight work area stores the optimum weight and its peak orientation.

When the delayed waves due to the multipath are taken into consideration for processing, the delayed waves due to the multipath may be subjected to the same processing and multipath combining (referred to as RAKE combining).

FIG. 5 shows a second example of the optimum weight selecting means 10.
It is a block diagram showing an example of.

As shown in FIG. 5, the weight W1 output for each symbol from the weight control unit 5 of the first receiving system.
1, W12, ..., W1n for one slot and a common work memory 301 for temporarily storing the calculation result data in the optimum weight selection processing, and all directions based on the weights stored in the common work memory 301 Of the beam pattern calculation unit 302 that calculates received power at predetermined azimuth intervals, and the same azimuth in the beam pattern calculated from the current weight corresponding to the peak azimuth of the beam pattern calculated from the optimum weight of the previous slot. Using the received power as a reference, the relative average level difference calculation unit 303 that obtains and averages the level differences from the received power in other directions in all directions, and the relative average level difference calculated from the weights of the symbols in the slots are sequentially The weight corresponding to the largest relative average level difference is compared as the optimum weight A weight selection unit 304-option, a peak direction detection unit 305 for detecting the peak direction of the beam pattern of the optimum weights, and a control unit 306 which controls each section.

By the way, normally, the peak azimuth does not largely shift between slots, and the beam pattern does not change greatly. However, if it is significantly deviated, it is highly likely that the weight is in an unstable state with many interference waves.

If the peak azimuth of the beam pattern calculated from the optimum weight of the preceding slot and the peak azimuth of the beam pattern calculated from the weight of this time are significantly different, the beam calculated from the weight of this time The received power of the same azimuth as the peak azimuth with the optimum weight in the pattern is lower than the original received power of the peak azimuth. Therefore, if the relative average level difference with the received power of the other direction is calculated with reference to the received power of the same direction as the peak direction with the optimum weight, this relative average level difference becomes small.

On the other hand, when there is little deviation between the peak azimuth of the beam pattern calculated from the optimum weight of the preceding slot and the peak azimuth of the beam pattern calculated from the weight of this time, in the beam pattern calculated from the weight of this time Since the received power of the same direction as the peak direction with the optimum weight is close to the original received power of the peak direction,
If the level difference from the received power of the other azimuths is obtained with reference to the received power of the same azimuth as the peak azimuth with the optimum weight, this relative average level difference becomes large.

As described above, when the relative average level difference of the received power is calculated and compared based on the peak azimuth of the beam pattern calculated from the optimum weight of the preceding slot, when the relative average level difference is small, the interference wave It can be determined that the weight is in an unstable state with a lot of.

The relative average level difference calculation unit 303 uses the received power in the beam pattern calculated from the current weight corresponding to the peak direction of the beam pattern calculated from the optimum weight of the preceding slot as a reference, and determines the other direction. The level difference from the received power is calculated for all directions and averaged.

The weight selecting section 304 sequentially compares the relative average level differences calculated from the weights of the symbols in the slots and selects the weight corresponding to the maximum relative average level difference as the optimum weight.

Next, the operation of the control unit 306 will be described.

First, the control unit 306 outputs the weight W output for each symbol from the weight control unit 5 of the first receiving system.
11, W12, ..., W1n are received, and one slot is stored in the common work memory 301.

Next, the weights W11, W12, ..., W of the first receiving system stored in the common work memory 301.
1n is read out for each symbol and the beam pattern calculation unit 3
No. 02, and the received power is calculated by sampling at a predetermined azimuth interval for all directions, and data (referred to as a beam pattern) indicating the received power in all directions is stored in the common work memory 301.

When the beam pattern calculation is completed for all the weights of each symbol in the slot, the beam patterns stored in the common work memory 301 are sequentially read out and supplied to the relative average level difference calculating section 303 in advance. Based on the received power corresponding to the peak direction of the beam pattern of the optimum weight of the previous slot stored,
The level difference from the received power in other directions is calculated for all directions and averaged to calculate a relative average level difference, which is stored in the common work memory 301.

Next, the relative average level difference calculated by the relative average level difference calculating unit 303 is sequentially read from the common work memory and compared by the weight selecting unit 304, and the weight corresponding to the beam pattern having the maximum relative average level difference is compared. Let be selected as the optimal weight. Then, the beam pattern of the optimum weight is supplied to the peak azimuth detecting unit 305 to detect the peak azimuth, and the optimum weight and the peak azimuth thereof are stored in the common work memory 301. The peak azimuth corresponding to this optimum weight is used when selecting the optimum weight in the next slot.

As a third embodiment of the optimum weight selecting means 10, when the weight for each symbol of the first reception system is received in slot units, the weight of the last symbol of the slot is selected as the optimum weight. You may

This can be proposed as the minimum function when the processing capacity of the calculation processor is low,
In particular, it is effective in the period from the initial startup of the receiving device to the convergence of the weight, and the demodulation error can be reduced in the period until the weight converges with a simple configuration. Since it is not shaken, weight instability can be eliminated and weight divergence can be completely eliminated.

[0068]

As described above, according to the present invention, one optimum weight is selected from the weights for each symbol in the slot generated in the first receiving system, and this optimum weight is used. By performing the demodulation process by using the demodulation process, it is possible to reduce the demodulation error in the period until the weight is converged after the receiver is started up. In addition, because unstable weights are not selected, it is possible to prevent the weights from becoming unstable due to noise per symbol as in the past, reduce demodulation errors, and eliminate weight divergence completely. You can

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a first of the optimum weight selection means 10 shown in FIG.
It is a block diagram showing an example of.

FIG. 3 is a flowchart showing the operation of the control unit 107 of the optimum weight selection means 10.

FIG. 4 is a diagram showing an example of data stored in a common work memory 101 of the optimum weight selection means 10.

5 is a block diagram showing a second embodiment of the optimum weight selecting means 10. FIG.

FIG. 6 is a block diagram showing a conventional example.

[Explanation of symbols]

1,7 Multiplier circuit 2,8 Combiner 3,9 Demodulator 4 Adder 5 Weight controller 6 Delayer 10 Optimal weight selector 101,301 Common work memory 102,302 Beam pattern calculator 103,305 Peak azimuth detector 104 Peak azimuth validity determination unit 105 Average level difference calculation unit 106 Weight selection unit 304 Weight selection unit 303 Relative average level difference calculation unit D1, D2, ..., Dn Signal data De of each antenna element De Error data Dp Known pilot data W11, W12, ..., W1n Weights of the first receiving system W21, W22, ..., W2n Optimal weights

Claims (6)

(57) [Claims] 1. A weight for multiplying signal data of each antenna element is updated and output for each symbol in a slot so that a value of error data indicating a difference between demodulated pilot data and known pilot data is minimized. A weight control unit, a multiplication circuit that multiplies the signal data of each antenna element by the output weight of the weight control unit, a combining unit that combines the output data of these multiplication circuits, and the output data of this combining unit is demodulated. A demodulation unit that
A first receiving system having an adder circuit for generating the error data by taking a difference between the demodulated pilot data included in the demodulation output data of the demodulation unit and the known pilot data; Receives the weight for each symbol output from the weight control unit of the receiving system and stores one slot in memory
Then, the weight for each symbol stored in this memory
The beam pattern was calculated respectively for
Peak with maximum received power for each beam pattern
The beam pattern of the optimum weight of the front slot is detected by detecting the azimuth.
Direction difference from the peak direction of each
Wave patterns corresponding to beam patterns with a displacement within a certain value
The optimum weight selection means for selecting one of the optimum weights from the
A first multiplication unit that multiplies the optimum weights output by the optimum weight selection unit, a combining unit that combines the output data of these multiplication circuits, and a demodulation unit that demodulates the output data of this combining unit and outputs demodulated output data 2. A receiving device comprising: two receiving systems. 2. The optimum weight selecting means of the second receiving system is a beam pattern in which the azimuth difference is within a fixed value.
Other than the received power of the peak direction as a reference
Average the level difference from the received power of
The average level difference is calculated, and the average level difference is the maximum.
The weight corresponding to the large beam pattern is optimally
2. The receiving device according to claim 1, wherein the receiving device is selected as a receiver. 3. Demodulated pilot data and a known pattern
If the value of the error data showing the difference from the Ylot data is the minimum
Multiply the signal data of each antenna element so that
The weight to be updated is output for each symbol in the slot.
The weight controller and the signal data of each antenna element
Multiply the output weights of the weight controller
Multiplying circuits and combining output data of these multiplying circuits
And a demodulation unit that demodulates the output data of the synthesis unit,
The demodulated signal included in the demodulated output data of this demodulation unit
Difference between pilot data and said known pilot data
And an adder circuit for taking the minutes and generating the error data.
And a sync signal output from the weight control unit of the first reception system.
Receives the weight for each volume and stores one slot in memory
Then, the weight for each symbol stored in this memory
The beam pattern is calculated for each of the
Corresponding to the peak direction of the beam pattern of the optimum weight of
The level with the received power of other directions based on the received power of
The differences are averaged in all directions and the relative average level difference is calculated.
Calculated and calculated, and the beam where the relative average level difference becomes maximum
Select the weight corresponding to the pattern as the optimum weight
Means for selecting the optimum weight and the signal of each antenna element.
Output of the optimum weight selection means to the signal data
And the output of these multiplication circuits.
A synthesis unit that synthesizes force data and the output data of this synthesis unit
And a demodulation section for demodulating the
2. A receiving device comprising: two receiving systems . 4. Demodulated pilot data and a known pattern
If the value of the error data showing the difference from the Ylot data is the minimum
Multiply the signal data of each antenna element so that
The weight to be updated is output for each symbol in the slot.
The weight controller and the signal data of each antenna element
Multiply the output weights of the weight controller
Multiplying circuits and combining output data of these multiplying circuits
And a demodulation unit that demodulates the output data of the synthesis unit,
The demodulated signal included in the demodulated output data of this demodulation unit
Difference between pilot data and said known pilot data
And an adder circuit for taking the minutes and generating the error data.
And a sync signal output from the weight control unit of the first reception system.
Receives the weight for each volume and stores one slot in memory
Then, the weight for each symbol stored in this memory
The optimum weight for the last symbol in the slot
Means for selecting the optimum weight and each of the above-mentioned weights.
Of the optimum weight selecting means to the signal data of the antenna element.
Multipliers that multiply the output optimal weights respectively, and this
And a synthesis unit that synthesizes the output data of the multiplication circuit
Demodulates the output data of the section and demodulates to output the output data
And a second receiving system having a unit. 5. Demodulated pilot data and a known pattern
If the value of the error data showing the difference from the Ylot data is the minimum
Multiply the signal data of each antenna element so that
The weight to be updated is output for each symbol in the slot.
The weight controller and the signal data of each antenna element
Multiply the output weights of the weight controller
Multiplying circuits and combining output data of these multiplying circuits
And a demodulation unit that demodulates the output data of the synthesis unit,
The demodulated signal included in the demodulated output data of this demodulation unit
Difference between pilot data and said known pilot data
And an adder circuit for taking the minutes and generating the error data.
And a sync signal output from the weight control unit of the first reception system.
Receives the weight of each bol and memorizes 1 slot,
Optimal weight selection to select one of the optimal weights
Means and the optimum data for the signal data of each antenna element.
The output optimal weights of the weight selection means are multiplied respectively.
Multiplying circuits and combining output data of these multiplying circuits
The demodulation output data is obtained by demodulating the output data of the synthesis unit and this synthesis unit.
A second receiving system having a demodulation unit for outputting the data, and the optimum weight selecting means of the second receiving system is the first receiving system.
Is output for each symbol from the weight control unit of the receiving system
One weight slot is stored and optimal weight is stored
Common to temporarily store the calculation result data in the selection process of
Work memory and previous stored in this common work memory
Beam that calculates the received power in all directions based on the weight
The pattern calculation unit and the beam pattern calculation unit
Received power for the beam pattern calculated for each symbol
Peak that indicates the peak value of
Calculated from the azimuth detector and the optimum weight of the previous slot
Beam pattern peak azimuth and said peak azimuth detector
This peak difference is compared with the peak direction detected by
Is determined to be within a preset fixed value.
And the peak azimuth validity determining unit.
Each beam that has been determined that the above-mentioned bearing difference is within a certain value
Other patterns based on the received power in the peak direction
Obtaining the level difference from the received power in all directions for all directions
Average level difference calculation section for averaging, and this average level difference calculation
The average level difference of each beam pattern calculated by
Beam pattern with maximum average level difference when compared sequentially
Select the weight corresponding to as the optimal weight
A receiving device , comprising: a weight selecting unit . 6. The demodulated pilot data and a known pattern
If the value of the error data showing the difference from the Ylot data is the minimum
Multiply the signal data of each antenna element so that
The weight to be updated is output for each symbol in the slot.
The weight controller and the signal data of each antenna element
Multiply the output weights of the weight controller
Multiplying circuits and combining output data of these multiplying circuits
And a demodulation unit that demodulates the output data of the synthesis unit,
The demodulated signal included in the demodulated output data of this demodulation unit
Difference between pilot data and said known pilot data
And an adder circuit for taking the minutes and generating the error data.
And a sync signal output from the weight control unit of the first reception system.
Receives the weight of each bol and memorizes 1 slot,
Optimal weight selection to select one of the optimal weights
Means and the optimum data for the signal data of each antenna element.
The output optimal weights of the weight selection means are multiplied respectively.
Multiplying circuits and combining output data of these multiplying circuits
The demodulation output data is obtained by demodulating the output data of the synthesis unit and this synthesis unit.
A second receiving system having a demodulation unit for outputting the data, and the optimum weight selecting means of the second receiving system is the first receiving system.
Is output for each symbol from the weight control unit of the receiving system
One weight slot is stored and optimal weight is stored
For temporarily storing the calculation result data in the selection process
Common work memory and stored in this common work memory
The calculated power of the received power in all directions based on the weight
From the pattern calculation section and the optimum weight of the previous slot
This time, which corresponds to the calculated peak direction of the beam pattern
Receive the beam pattern calculated from the weight in the same direction.
The level difference from the received power of other directions based on the received power
Relative average level difference calculator that calculates and averages in all directions
And calculated from the weight of each symbol for the one slot
The relative average level difference is compared sequentially and the relative average level difference is
The weight corresponding to the maximum beam pattern is optimally adjusted.
Weight selection section to be selected as a weight and the optimum weight.
Direction to detect the peak azimuth of the beam pattern of Ito
A receiver having a position detector .