KR20160024448A - Apparatus and method for recovering transmitted signal using compressed sensing scheme in multu-user spatial modulation system - Google Patents

Apparatus and method for recovering transmitted signal using compressed sensing scheme in multu-user spatial modulation system Download PDF

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KR20160024448A
KR20160024448A KR1020140111141A KR20140111141A KR20160024448A KR 20160024448 A KR20160024448 A KR 20160024448A KR 1020140111141 A KR1020140111141 A KR 1020140111141A KR 20140111141 A KR20140111141 A KR 20140111141A KR 20160024448 A KR20160024448 A KR 20160024448A
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transmission
index
signal
technique
residual
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KR1020140111141A
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Korean (ko)
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정방철
반태원
박정홍
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경상대학교산학협력단
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/3059—Digital compression and data reduction techniques where the original information is represented by a subset or similar information, e.g. lossy compression
    • H03M7/3062—Compressive sampling or sensing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines

Abstract

A restoration apparatus and a restoration method for restoring a transmission signal from a reception signal are disclosed. In the restoration apparatus and the restoration method, an index for a plurality of transmit antennas is selected, and then an orthogonal matching funspot technique is applied to each antenna index in parallel, and when an iterative process of the orthogonal matching funget technique is performed, Find the next index except for all antenna indexes of users with antennas.

Figure P1020140111141

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an apparatus and a method for restoring a transmission signal using a compression sensing technique in a multi-user space modulation system,

The following embodiments relate to the field of compression sensing, and more specifically, to an apparatus and method for restoring a transmission signal in a received signal by applying a compression sensing technique in parallel.

The Nyquist sampling theory is the basis for most current digital devices to acquire analog signals. According to this theory, in order to fully recover the analog signal, it is necessary to sample at a frequency more than twice that of the analog signal frequency bandwidth. This theory is concise and clear, but it is not a sufficient condition to restore the signal completely and therefore does not reflect the characteristics of the signal. Recently, as the amount of data to be sampled rapidly increases as shown in examples of high-resolution image processing and high-speed communication system, the question of efficiency of this theory has been constantly raised.

Candes and Donoho et al. Have shown that if the number of zeros in the signal vector to be restored is large, the original signal can be perfectly restored with a much higher compression ratio than the Nyquist sampling. This theory is often called compression sensing.

It is an object of the following embodiments to reduce the error probability of a reconstruction device that reconstructs a signal.

The object of the following embodiments is to prevent estimation of a plurality of signals transmitted for a transmission signal transmitted using a spatial modulation scheme.

According to an exemplary embodiment, there is provided a reconstruction apparatus for reconstructing a transmission signal transmitted from transmission apparatuses using a spatial modulation scheme from a received signal, the apparatus comprising: a plurality of transmission antennas, An antenna index selector for selecting an index for the selected indices, and a restoration signal corresponding to each of the selected indices and a residual matrix corresponding to each of the selected indices by repeatedly applying an orthogonal matching technique to the selected indices in parallel And a restoration signal selector for selecting a restoration signal corresponding to a residual matrix for generating the smallest residual among the residual matrices as a restoration signal of the transmission signal, Among the indexes corresponding to a plurality of transmission antennas, Select the next index in the other index than the index to the recovery apparatus is provided for applying the orthogonal peosyut matching techniques.

Here, the antenna index selector may select the index of the transmit antenna according to the degree of correlation between each column vector of the channel matrix having the vector channel from the transmitting devices to the receiving device as an element and the received signal.

The iterative calculator may determine an orthogonal projection over the span of the indexes of the added transmit antenna as the orthogonal matching perchoe technique is repeated and generate a residual signal based on the determined orthogonality .

In addition, the iterative calculation unit may calculate the orthogonal projection using a pseudo inverse matrix of the channel matrix.

According to another exemplary embodiment, there is provided a reconstruction method for reconstructing a transmission signal transmitted from transmission devices using a spatial modulation scheme from a received signal, the reconstructing method comprising: a plurality of transmission antennas Selecting an index for an antenna, and applying an orthogonal matching technique to the selected indexes in parallel to generate a residual matrix corresponding to each of the selected indexes and a restoration signal corresponding to each of the selected indexes And selecting a restoration signal corresponding to a residual matrix that generates the smallest residual among the residual matrices as a restoration signal of the transmission signal, The index excluding the previously selected index among the indexes corresponding to the transmission antenna There is provided a restoration method of selecting the next index among other indices and applying the orthogonal matching permutation technique.

Here, the step of selecting the antenna index may select the index of the transmission antenna according to the degree of correlation between each column vector of the channel matrix having the vector channel from the transmission devices to the reception device as an element and the received signal have.

The repeated application step may include determining an orthogonal projection over a span of the indexes of the added transmit antennas as the orthogonal matching perchoe technique is repeated and generating a residual signal based on the determined orthogonality .

In addition, the step of repeatedly applying may calculate the orthogonal projection using a pseudo inverse matrix of the channel matrix.

According to the embodiments described below, it is possible to reduce the error probability of the restoration apparatus for restoring a signal.

According to the embodiments described below, it is possible to prevent estimation of a plurality of signals transmitted to a transmission signal transmitted using a spatial modulation scheme.

1 is a diagram showing a receiving apparatus receiving transmission signals transmitted from a plurality of transmission apparatuses using a spatial modulation scheme according to an exemplary embodiment;
2 is a diagram showing a relationship between a reception signal and a transmission signal.
3 is a block diagram showing the structure of a restoration apparatus according to an exemplary embodiment.
FIG. 4 is a flowchart illustrating a restoration method according to an exemplary embodiment.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings.

1 is a diagram showing a receiving apparatus receiving transmission signals transmitted from a plurality of transmission apparatuses using a spatial modulation scheme according to an exemplary embodiment;

The transmission apparatuses 120 and 130 transmit data to the reception apparatus 110 using a plurality of transmission antennas 121 and 131. [ According to one aspect, the transmission apparatuses 120 and 130 may modulate data using a spatial modulation scheme, and may transmit the modulated data using a plurality of transmission antennas 121 and 131. The spatial modulation scheme is a technique of transmitting data using only one of the plurality of transmission antennas 121 and 131 provided in the transmission apparatuses 120 and 130. [ Therefore, each of the transmission devices 120 and 130 has only one RF chain, and transmits the modulated data using the RF chain using one of the antennas 121 and 131 mapped to the corresponding data.

The reception signal received by the reception apparatus 110 includes all the transmission signals received from the transmission apparatuses 120 and 130. A maximum likelihood (ML) detection technique may be used as a method of restoring each transmission signal included in a received signal. However, the maximum likelihood detection technique can not be used in a situation where the number of transmission devices 120 and 130 is large due to detection complexity.

In order to solve the complexity problem of the signal detection technique, a detection method using a compression sensing technique has been proposed. Of the techniques for recovering the transmitted signal using the compression sensing technique, the Orthogonal Matching Pursuit (OMP) technique is known to exhibit relatively good performance with relatively low complexity. The orthogonal matching percess technique is a technique of adding a column index of a column vector having a high degree of correlation with a received signal to a support index of a transmission signal, to be. However, the orthogonal matching permutation scheme has a disadvantage in that the complexity is lower than that of the maximum likelihood scheme, but the performance gap is very large.

In the following description, as shown in FIG. 1, a restoration scheme is proposed in which an orthogonal matching perchture technique is improved in consideration of a multi-user environment in which a plurality of transmission devices 120 and 130 transmit data to a reception device, respectively. The proposed orthogonal matching perchoe technique is based on the assumption that the K transmission devices 120,

Figure pat00001
It is assumed that the transmission antennas 121 and 131 are provided. In this case, the proposed orthogonal matching permutation technique
Figure pat00002
The transmission antennas 121 and 131 may be considered.

The restoration apparatus according to the exemplary embodiment operates as the reception apparatus 110 and restores the transmission signals transmitted from the transmission apparatuses 120 and 130 from the reception signals.

2 is a diagram showing a relationship between a reception signal and a transmission signal.

2, the received signal 210,

Figure pat00003
Is a signal received by the receiving apparatus using a plurality of receiving antennas. here,
Figure pat00004
The
Figure pat00005
to be.
Figure pat00006
Represents the number of receiving antennas of the receiving apparatus.

Channel matrix 220,

Figure pat00007
Is a matrix having vector channels from the transmitting apparatus to the receiving apparatus as elements. here,
Figure pat00008
to be.
Figure pat00009
Denotes the number of transmit antennas provided in each transmission apparatus,
Figure pat00010
Is the number of transmission devices.

The transmission signal matrices 240, 250, 260, and 270 are matrices having elements as transmission signals transmitted by each transmission apparatus. Here, the columns of the transmission signal matrix are

Figure pat00011
to be. The transmission signal transmitted from the first transmission apparatus is used as an element from the first row to the Nt-th row 240 of the transmission signal matrix. Also, the transmission signal transmitted from the second transmission apparatus is used as an element from the (Nt + 1) th row to the (2Nt) th row 250 of the transmission signal matrix.

The spatial modulation scheme is a technique of transmitting data using only one of a plurality of transmission antennas of a transmission apparatus. Therefore, most of the transmission signals 240, 250, 260, and 270 transmitted by each transmission apparatus have a value of '0', and only one signal 241, 251, 261, and 271 have values.

If the channel matrix 220 is a square matrix, the decompressor can recover the transmission signals 240, 250, 260, and 270 from the reception signal 210 by calculating the inverse matrix of the channel matrix 220. However,

Figure pat00012
The size of
Figure pat00013
. Therefore, the restoration apparatus can not calculate the inverse matrix of the channel matrix 220 in most cases. Therefore, restoring the transmission signal from the received signal 210 is difficult in most cases.

2, when most of the transmission signals 240, 250, 260 and 270 have a value of '0' and only a part thereof has a value of '0', the transmission signals 240 and 250 260, and 270 may be sparse signals, and the transmission signals 240, 250, 260, and 270 may be recovered from the received signal 210 using a compression sensing technique.

The operation of the decompression apparatus for recovering the transmission signals 240, 250, 260, and 270 from the reception signal 210 will be described in detail with reference to FIG.

3 is a block diagram showing the structure of a restoration apparatus according to an exemplary embodiment. The restoration apparatus 300 according to the exemplary embodiment includes a reception unit 310, an antenna index selection unit 320, an iteration calculation unit 330, and a restoration signal selection unit 340.

The receiving unit 310 receives a transmission signal transmitted from transmission devices using a spatial modulation scheme, and generates a reception signal. According to one aspect, the receiver 310 can receive transmission signals using a plurality of reception antennas. The received signal includes a distorted transmission signal via a vector channel between the transmitting apparatus and the receiving apparatus.

Here, the spatial modulation scheme is a technique of transmitting data using only one of the plurality of transmission antennas 121 and 131 included in the transmission apparatus. In this case, the transmission antenna for transmitting data may be classified as an activated antenna and the other antennas for not transmitting data may be classified as inactive.

The antenna index selection unit 320 selects an index for a plurality of transmission antennas from a plurality of transmission antennas. In addition, the antenna index selector 320 initializes the parameters of the orthogonal matching pershot technique and performs a first calculation process of the orthogonal matching pershot technique.

First, the antenna index selector 320 may initialize the parameters of the orthogonal matching perchoe technique as shown in Equation (1).

[Equation 1]

Figure pat00014

Figure pat00015

Figure pat00016

Figure pat00017

here,

Figure pat00018
T is an index indicating the number of times of repetition of the orthogonal matching funget technique, and m is an index for distinguishing orthogonal matching percess techniques applied in parallel.
Figure pat00019
, Where M is the number of orthogonal matching permutation techniques applied in parallel.

Figure pat00020
Is the residual matrix of the m-th orthogonal matching per-shot technique at the t-th iteration.
Figure pat00021
Is the antenna index matrix of the m-th orthogonal matching per-shot technique at the t-th iteration.
Figure pat00022
Is the user index matrix of the m-th orthogonal matching per-shot technique at the t-th iteration.

In addition, the antenna index selector 320

Figure pat00023
Of the transmission devices
Figure pat00024
And selects an index for a plurality of transmission antennas among the plurality of transmission antennas. The antenna index selector 320 can select an index for M transmit antennas. The antenna index selector 320 can select the index of the transmission antenna according to the degree of correlation between each column vector of the channel matrix having the vector channel from the transmission devices to the reception device as an element and the received signal.

According to one aspect, the antenna index selector 320 may normalize each column of the channel matrix to L2-norm, and calculate the correlation between each column of the normalized channel matrix and the received signal. The antenna index selector 320 divides the indexes of the M columns having the greatest degree of correlation into indexes for the transmission antennas

Figure pat00025
.

According to an aspect of the present invention, the antenna index selector 320 may calculate an antenna index

Figure pat00026
Can be determined.

&Quot; (2) "

Figure pat00027

The antenna index selector 320 selects an antenna index

Figure pat00028
, As well as performing the first calculation procedure of the orthogonal matching permutation technique.

In this case, the antenna index selector 320 selects the antenna index

Figure pat00029
Lt; RTI ID = 0.0 > a < / RTI > user index matrix
Figure pat00030
. ≪ / RTI > Also, the antenna index selector 320 selects the antenna index
Figure pat00031
Antenna index matrix < RTI ID =
Figure pat00032
. ≪ / RTI >

According to an aspect of the present invention, the antenna index selector 320 may calculate an antenna index

Figure pat00033
Lt; RTI ID = 0.0 > a < / RTI > user index matrix
Figure pat00034
And the antenna index
Figure pat00035
Antenna index matrix < RTI ID =
Figure pat00036
. ≪ / RTI >

&Quot; (3) "

Figure pat00037

The antenna index selector 320 selects an antenna index matrix

Figure pat00038
≪ / RTI >< RTI ID = 0.0 >
Figure pat00039
As an officer
Figure pat00040
Can be determined. According to one aspect, the antenna index selection unit 320 selects the antenna index
Figure pat00041
And
Figure pat00042
Can be calculated.

&Quot; (4) "

Figure pat00043

Figure pat00044

In addition, the antenna index selector 320 selects the received signal

Figure pat00045
And the residual matrix
Figure pat00046
Can be calculated and updated. According to an aspect of the present invention, the antenna index selection unit 320 selects the reception signal
Figure pat00047
And the residual matrix
Figure pat00048
Can be updated.

&Quot; (5) "

Figure pat00049

Thereafter, the antenna index selector 320 selects

Figure pat00050
about
Figure pat00051
Can be substituted.

The iterative calculation unit 330 repeats the calculation process of the predetermined number of times from the second calculation process of the orthogonal matching technique. The iterative calculator 330 repeatedly applies the calculation procedure of the orthogonal matching perchoe technique to generate restoration signals corresponding to each of the selected indices and the residual matrix corresponding to the selected indices. According to one aspect, the iterative calculation unit 330 can repeatedly apply the orthogonal matching permutation technique to each of the M indexes in parallel.

First, the iterative calculation unit 330 calculates an index of an active transmit antenna

Figure pat00052
. According to one aspect, the index of the column with the highest correlation between each column of the normalized channel matrix and the residual matrix is referred to as an index
Figure pat00053
. According to an aspect of the present invention, the iterative calculation unit may select an index from among the indices corresponding to the plurality of transmit antennas included in each transmission apparatus, among the indices other than the previously selected index.

According to one aspect, the iterative computation unit may be configured to perform the iterative computation on each of the columns of the normalized channel matrix,

Figure pat00054
The index can be selected from other columns except the column including the index.

&Quot; (6) "

Figure pat00055

In addition, the iterative calculation section 330 calculates an index

Figure pat00056
All the transmit antenna indexes of the transmitting apparatus including
Figure pat00057
And the antenna index
Figure pat00058
Antenna index matrix < RTI ID =
Figure pat00059
. ≪ / RTI >

According to one aspect, the iterative calculation unit 330 calculates an index of an antenna according to Equation (7)

Figure pat00060
All the transmit antenna indexes of the transmitting apparatus including
Figure pat00061
And the antenna index
Figure pat00062
Antenna index matrix < RTI ID =
Figure pat00063
. ≪ / RTI >

&Quot; (7) "

Figure pat00064

The iterative calculator 330 calculates the antenna index matrix

Figure pat00065
≪ / RTI >< RTI ID = 0.0 >
Figure pat00066
As an officer
Figure pat00067
Can be determined. According to one aspect, the iterative calculation unit 330 calculates an iterative
Figure pat00068
And
Figure pat00069
Can be calculated.

&Quot; (8) "

Figure pat00070

Figure pat00071

In addition, the iterative calculation section 330 calculates an iterative reception signal

Figure pat00072
And the residual matrix
Figure pat00073
Can be calculated and updated. According to one aspect, the iterative calculation section 330 calculates an iterative estimate of the received signal < RTI ID = 0.0 &
Figure pat00074
And the residual matrix
Figure pat00075
Can be updated.

&Quot; (9) "

Figure pat00076

The restoration device 300 may perform iterative computation of the orthogonal matching pershoot technique K times. In this case, the iterative calculation unit 330 can compare the current number of calculations t and K. if,

Figure pat00077
, The iterative calculation section 330
Figure pat00078
And the index of the active transmit antenna according to Equation (6)
Figure pat00079
Can be selected.

But,

Figure pat00080
, The iterative calculation section 330 ends the operation.

The restoration signal selector 340 restores the restored signal corresponding to the residual matrix generating the smallest residual among the M residual matrices generated by applying the orthogonal matching perchoe technique to each of the M initial indexes, Signal. According to one aspect, the restoration signal selector 340 can select a restoration signal of a transmission signal according to Equation (10).

&Quot; (10) "

Figure pat00081

here,

Figure pat00082
Is the index of the residual matrix that produces the smallest residual,
Figure pat00083
Is a restoration signal of the transmission signal.

According to the embodiment shown in FIG. 3, after the M orthogonal matching technique is applied in parallel, the restoration apparatus selects the restored signal having the smallest residue among the M restored signals as the restored signal of the transmitted signal, Can be reduced.

In the embodiment shown in FIG. 3, the signal restoration performance is improved by applying an orthogonal matching pulses (OMP) detection scheme in a spatial modulation (SM) system of a multi-user (MU) environment Technique has been proposed. With the multi-user spatial modulation technique, each transmission device

Figure pat00084
And transmits data using only one of the antennas. Therefore, the restoration apparatus performs the first iteration in consideration of the characteristics of the data, and searches for the next index except for all the antennas of the transmission apparatus having the antenna corresponding to the previous index when searching the second and subsequent indexes. This is a feature of a spatial modulation scheme in which only one transmission antenna among a plurality of transmission antennas included in one transmission apparatus is activated and transmits a transmission signal. In other words,
Figure pat00085
Only one antenna is selected from the plurality of transmission antennas, thereby preventing the selection of two or more antennas, thereby reducing the error probability.

FIG. 4 is a flowchart illustrating a restoration method according to an exemplary embodiment.

In operation 410, the decompression apparatus receives a transmission signal transmitted from the transmission apparatuses using a spatial modulation scheme, and generates a reception signal. The spatial modulation scheme is a technique of transmitting data using only one of a plurality of transmission antennas of a transmission apparatus.

In step 420, the decompression apparatus selects an index for a plurality of transmit antennas from a plurality of transmit antennas. Then, the parameters of the orthogonal matching play technique are initialized, and the first calculation process of the orthogonal matching play technique is performed.

According to one aspect, the restoration device may initialize the parameters of the orthogonal matching per-shot technique as shown in equation (1).

In addition,

Figure pat00086
Of the transmission devices
Figure pat00087
And selects an index for a plurality of transmission antennas among the plurality of transmission antennas. The restoration device can select the index of the transmission antenna according to the degree of correlation between each column vector of the channel matrix having the vector channel from the transmission devices to the reception device as an element and the received signal.

According to one aspect, the decompression apparatus may normalize each column of the channel matrix to L2-norm, and calculate the correlation between each column of the normalized channel matrix and the received signal. The restoration apparatus calculates the indexes of the M columns having the greatest correlation with the indexes

Figure pat00088
. According to one aspect of the present invention,
Figure pat00089
Can be determined.

The restoration device includes an antenna index

Figure pat00090
, As well as performing the first calculation procedure of the orthogonal matching permutation technique.

In this case, the restoration apparatus calculates an antenna index

Figure pat00091
Lt; RTI ID = 0.0 > a < / RTI > user index matrix
Figure pat00092
. ≪ / RTI > In addition,
Figure pat00093
Antenna index matrix < RTI ID =
Figure pat00094
. ≪ / RTI >

The restoration apparatus includes an antenna index matrix

Figure pat00095
≪ / RTI >< RTI ID = 0.0 >
Figure pat00096
As an officer
Figure pat00097
And
Figure pat00098
Can be determined as shown in Equation (4). Further, the restoration apparatus calculates the estimated reception signal < RTI ID = 0.0 >
Figure pat00099
And the residual matrix
Figure pat00100
Can be calculated and updated.

Thereafter,

Figure pat00101
about
Figure pat00102
Can be substituted.

In step 430, the decompression apparatus repeats the calculation process of the predetermined number of times from the second calculation process of the orthogonal matching technique. The restoration apparatus may repeatedly apply the calculation process of the orthogonal matching perchot technique to generate restoration signals corresponding to the respective residual indices and selected indices corresponding to the selected indices.

At step 430, the restoration device determines the index of the active transmit antenna

Figure pat00103
Can be determined. According to one aspect, the decompression apparatus is configured to decompose a normalized channel matrix
Figure pat00104
The index can be selected from other columns except the column including the index.

Also, the restoration apparatus calculates the index of the antenna according to Equation (7)

Figure pat00105
All the transmit antenna indexes of the transmitting apparatus including
Figure pat00106
And the antenna index
Figure pat00107
Antenna index matrix < RTI ID =
Figure pat00108
. ≪ / RTI >

The restoration apparatus calculates an antenna index matrix < RTI ID = 0.0 >

Figure pat00109
≪ / RTI >< RTI ID = 0.0 >
Figure pat00110
As an officer
Figure pat00111
And
Figure pat00112
Can be determined.

The restoration apparatus calculates, according to Equation (9), the estimated received signal

Figure pat00113
And the residual matrix
Figure pat00114
Can be calculated and updated.

The restoration device may perform the iterative calculation of the orthogonal matching percess technique K times. In this case, the restoration device can compare the current number of calculations t and K. if,

Figure pat00115
, The restoration device
Figure pat00116
And the index of the active transmit antenna according to Equation (6)
Figure pat00117
Can be selected. But,
Figure pat00118
, The restoration device terminates the iterative calculation.

In step 440, the decompression apparatus computes, according to Equation (10), an orthogonal matching per-shot technique corresponding to a residual matrix that produces the smallest residual among the M residual matrices generated by applying for each of the M initial indices The restoration signal can be selected as the restoration signal of the transmission signal.

The method according to an embodiment may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions to be recorded on the medium may be those specially designed and configured for the embodiments or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI > or equivalents, even if it is replaced or replaced.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

110: Receiver
111: Receive antenna
120, 130: Transmission device
121, 131: Transmission antenna

Claims (8)

A reconstruction apparatus for reconstructing a transmission signal transmitted from transmission apparatuses using a spatial modulation scheme from a reception signal,
An antenna index selector for selecting an index for a plurality of transmission antennas among a plurality of transmission antennas included in each of the transmission devices;
An iterative calculation unit that applies an orthogonal matching perchoe technique to the selected indices in parallel to generate a residual matrix corresponding to each of the selected indices and a restoration signal corresponding to each of the selected indices; And
A restoration signal selector for selecting a restoration signal corresponding to a residual matrix for generating the smallest residual among the residual matrices as a restoration signal of the transmission signal,
Lt; / RTI >
Wherein the iterative calculation unit applies the orthogonal matching perchoe technique by selecting a next index among indexes other than a previously selected index among indexes corresponding to a plurality of transmit antennas included in each transmission apparatus.
The method according to claim 1,
Wherein the antenna index selector selects an index of the transmit antenna according to a degree of correlation between each column vector of a channel matrix having the vector channel from the transmitting devices to the receiving device as an element and the received signal.
The method according to claim 1,
Wherein the iterative calculator determines an orthogonal projection over a span of the indexes of the added transmit antenna as the orthogonal matching perform technique is repeated and generates a residual signal based on the determined orthogonality.
The method of claim 3,
Wherein the iterative calculation unit calculates the orthogonal projection using a pseudo inverse matrix of the channel matrix.
A restoration method for restoring a transmission signal transmitted from transmission devices from a received signal using a spatial modulation scheme,
Selecting an index for a plurality of transmission antennas from a plurality of transmission antennas included in each of the transmission devices;
Generating a restoration signal corresponding to each of the selected indices and a residual matrix corresponding to each of the selected indices by repeatedly applying an orthogonal matching technique to the selected indices in parallel; And
Selecting a restoration signal corresponding to a residual matrix that generates the smallest residual among the residual matrices as a restoration signal of the transmission signal
Lt; / RTI >
Wherein the iterative calculation applies the orthogonal matching perchoe technique by selecting a next index among indexes other than a previously selected index among the indexes corresponding to a plurality of transmit antennas included in each transmission apparatus.
6. The method of claim 5,
Wherein the step of selecting the antenna index includes a step of selecting an index of the transmit antenna according to a degree of correlation between each column vector of a channel matrix having vector channels from the transmission devices to the reception device as elements, .
6. The method of claim 5,
Wherein the repeated application step comprises determining a orthogonal projection over a span of indexes of the added transmit antenna as the orthogonal matching perchoe technique is repeated and generating a residual signal based on the determined orthogonality .
8. The method of claim 7,
Wherein the step of repeatedly applying the orthogonal projection calculates the orthogonal projection using a pseudo inverse matrix of the channel matrix.
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Publication number Priority date Publication date Assignee Title
GB2548875A (en) * 2016-03-31 2017-10-04 Plextek Services Ltd Signal detector and method
CN108507789A (en) * 2018-05-31 2018-09-07 燕山大学 The sparse diagnostic method of rolling bearing fault based on the weak orthogonal matching pursuit of mean random
CN108507789B (en) * 2018-05-31 2020-02-25 燕山大学 Rolling bearing fault sparse diagnosis method
CN111446967A (en) * 2020-04-02 2020-07-24 山东大学 Pulse ultra-wideband signal receiving and detecting method and system based on compressed sensing
CN111446967B (en) * 2020-04-02 2021-10-26 山东大学 Pulse ultra-wideband signal receiving and detecting method and system based on compressed sensing

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