KR20160150589A - In-band full duplex transceiver - Google Patents

Abstract

Disclosed is an in-band full duplex transceiver which comprises: a multi-polarized antenna including a plurality of polarized transmitting/receiving units transmitting/receiving different polarizations; and a plurality of transmitting/receiving modules connected to the plurality of polarized transmitting/receiving units respectively, configured to receive received signals through the plurality of polarized transmitting/receiving units, and configured to transmit transmitted signals through the plurality of polarized transmitting/receiving units. Each transmitting/receiving module comprises: an analog circuit unit including a finite impulse response filter which converts an analog received signal received through a corresponding polarized transmitting/receiving unit into a digital received signal, converts a digital transmitted signal into an analog transmitted signal, and uses the analog transmitted signal to cancel self-interference from the analog received signal; and a distributor configured to transmit the analog received signal inputted from the corresponding polarized transmitting/receiving unit to the analog circuit unit and configured to transmit the analog transmitted signal inputted from the analog circuit unit to the corresponding polarized transmitting/receiving unit.

Description

IN-BAND FULL DUPLEX TRANSCEIVER < RTI ID = 0.0 >

Embodiments relate to a same-band full duplex transceiver, and more particularly to a multiple-input multiple-output same-band full duplex transceiver.

In a half duplex (HD) system currently used in a wireless communication system, transmission / reception is performed by distributing time / frequency. Therefore, orthogonality between transmission and reception can be maintained in a wireless communication system using the HD scheme. On the other hand, in the wireless communication system using the HD scheme, time / frequency resources are wasted.

In-band Full Duplex (IFD) is a solution to overcome the inefficiency of the HD system and is a technology capable of transmitting and receiving simultaneously in the same band. The IFD scheme can theoretically increase the link capacity up to twice as much as the HD scheme.

On the other hand, the IFD scheme has a problem that a self-interference signal (SI) signal is generated which is stronger than the effective reception signal due to the self-transmission signal being introduced into the receiver. Therefore, it is necessary to remove the SI in order to perform smooth communication by the IFD method.

The IFD transceiver can achieve spectral efficiency up to twice as high as the HD transceiver if the SI cancellation is sufficient. However, when implementing the SI Cancellation (SIC) in the IFD transceiver, the complexity of the IFD transceiver increases. In particular, when the IFD transmission / reception technique is applied to a multiple-input multiple-output (MIMO) system, the complexity for implementing the SIC is greatly increased.

The problem to be solved by the embodiments is to provide a full-duplex transceiver of the same band that can reduce hardware complexity due to multiple input multiple output while effectively eliminating magnetic interference.

According to an aspect of the present invention, there is provided a same-band full-duplex transceiver including: a multi-polarized wave antenna including a plurality of polarized wave transmitting / receiving units for transmitting / receiving different polarized waves; and a plurality of polarized wave antennas connected to the plurality of polarized wave transmitting / And a plurality of transmission and reception modules for receiving the signals through the polarization transmission and reception unit and transmitting the transmission signals through the plurality of polarization transmission and reception units, wherein each of the transmission and reception modules transmits the analog reception signal received through the corresponding polarization transmission and reception unit, And a finite impulse response filter that converts the digital transmission signal into an analog transmission signal and removes magnetic interference from the analog reception signal using the analog transmission signal, The input analog Passing the new signal to the analog circuit, and may include a divider to the corresponding delivered to the polarized wave transmission and reception of the analog transmission signal inputted from the analog circuit.

In addition, the same-band full duplex transceiver according to another embodiment may include a plurality of polarized wave antennas including a plurality of polarized wave transmitting and receiving sections for transmitting and receiving a plurality of polarized waves, and a plurality of polarized wave antennas connected to the plurality of polarized wave transmitting and receiving sections, A plurality of transmission and reception modules for receiving the reception signals and transmitting the transmission signals through the plurality of polarization transmission and reception sections, and using the transmission signals, the interference between the polarized wave transmission and reception sections transmitting and receiving the same polarization in the plurality of polarization separation antennas And a plurality of first finite impulse response filters to be removed.

The embodiment has the effect of reducing hardware complexity due to multiple input multiple output of the same-band full duplex transceiver while effectively eliminating magnetic interference.

1 schematically shows an IFD transceiver according to a first embodiment.
2 schematically shows an IFD transceiver according to a second embodiment.
3 schematically shows an IFD transceiver according to a third embodiment.
4 schematically shows an IFD transceiver according to a fourth embodiment.
5 schematically shows an IFD transceiver according to a fifth embodiment.
6 schematically shows an IFD transceiver according to a sixth embodiment.
7 schematically shows an IFD transceiver according to a seventh embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification and claims, when a section is referred to as "including " an element, it is understood that it does not exclude other elements, but may include other elements, unless specifically stated otherwise.

Throughout the specification, a terminal is referred to as a mobile terminal (MT), a mobile station (MS), an advanced mobile station (AMS), a high reliability mobile station (HR- A subscriber station (SS), a portable subscriber station (PSS), an access terminal (AT), a user equipment (UE) , HR-MS, SS, PSS, AT, UE, and the like.

Also, a base station (BS) is an advanced base station (ABS), a high reliability base station (HR-BS), a node B, an evolved node B, eNodeB), an access point (AP), a radio access station (RAS), a base transceiver station (BTS), a mobile multihop relay (MMR) (RS), a relay node (RN) serving as a base station, an advanced relay station (ARS) serving as a base station, a high reliability relay station (HR) A femto BS, a home Node B, a HNB, a pico BS, a metro BS, a micro BS, ), Etc., and all or all of ABS, Node B, eNodeB, AP, RAS, BTS, MMR-BS, RS, RN, ARS, HR- And may include negative functionality.

Throughout the specification, a transceiver may be a terminal, a mobile terminal (MT), a mobile station (MS), an advanced mobile station (AMS), a high reliability mobile station , An HR-MS, a subscriber station (SS), a portable subscriber station (PSS), an access terminal (AT), user equipment (UE) MS, AMS, HR-MS, SS, PSS, AT, UE, and the like.

In addition, the transceiver includes a base station (BS), an advanced base station (ABS), a high reliability base station (HR-BS), a node B, an evolved node B, an eNodeB, an access point (AP), a radio access station (RAS), a base transceiver station (BTS), a mobile multihop relay (MMR) And may be referred to as a relay station (RS), a high reliability relay station (HR-RS) serving as a base station, etc., and may be referred to as an ABS, a Node B, an eNodeB, an AP, a RAS, a BTS, BS, RS, HR-RS, and the like.

Hereinafter, an in-band full duplex (IFD) transceiver capable of performing multiple-input multiple-output (MIMO) according to embodiments will be described in detail with reference to required figures.

1 schematically shows an IFD transceiver according to a first embodiment.

Referring to FIG. 1, the IFD transceiver 100 according to the first embodiment may include one antenna ANT10 and a plurality of IFD transmission / reception modules 110 and 120 connected to one antenna ANT10 .

The antenna ANT10 is a multi-polarized antenna including a plurality of polarized wave transmission / reception units for transmitting / receiving different polarized signals. 1 shows an example in which the antenna ANT10 is a dual polarized antenna including two polarized wave transmitting / receiving units (for example, a vertical polarized wave transmitting / receiving unit and a horizontal polarized wave transmitting / receiving unit) Respectively.

Polarization of an electromagnetic wave refers to a wave of an electric field component at a fixed point or a fixed surface perpendicular to the traveling direction of the electromagnetic wave. In radio communication technology, radio waves radiated through an antenna have a polarization characteristic inherent to each antenna. Linearly polarized waves exhibit polarization waves in which the electric field vector direction always vibrates only in a single one-dimensional direction. When the electromagnetic wave is horizontal to the ground, it is called horizontally polarized. When the electromagnetic wave is orthogonal to the earth, it is called vertically polarized. The horizontal polarization and the vertical polarization are orthogonal to each other.

Different IFD transmission / reception modules 110 and 120 may be connected to the respective polarization transmission and reception units of the antenna ANT10. For example, the IFD transmission / reception module 110 may be connected to the vertical polarization transmission / reception unit of the antenna ANT10, and the IFD transmission / reception module 120 may be connected to the horizontal polarization transmission / reception unit of the antenna ANT10.

IFD transceiver modules 110 and 120 transmit and receive polarization signals independently of each other. For example, the IFD transceiver module 110 transmits and receives signals through the vertically polarized transceiver of the antenna ANT10, and the IFD transceiver module 120 can transmit and receive signals through the horizontal polarization transceiver of the antenna ANT10.

Each of the IFD transmission and reception modules 110 and 120 may be configured with distributors D11 and D12, an analog circuit section, and a digital circuit section.

Dividers D11 and D12 are connected between the respective polarization transmission and reception units of the antenna ANT10 and the analog circuit units of the IFD transmission and reception modules 110 and 120. [

Each of the distributors D11 and D12 transmits a transmission signal to a transmission path and transmits the reception signal to a reception path to distribute the transmission signal and the reception signal. Each of the distributors D11 and D12 receives a transmission signal from an analog circuit section (for example, a power amplifier (PA) or the like) of each of the IFD transmission and reception modules 110 and 120, To the transmitting / receiving unit. Each of the distributors D11 and D12 receives a reception signal from each of the polarization transmitting and receiving units of the antenna ANT10 and outputs it to the analog circuit unit of each of the IFD transmission and reception modules 110 and 120 (for example, a Low Noise Amplifier , LNA), etc.).

The distributors D11 and D12 have a characteristic of separating the transmission path and the reception path of each IFD transmission / reception module 110 and 120 from each other as described above. Due to this characteristic, the distributors D11 and D12 can perform SI Cancellation (SIC) which suppresses the occurrence of self interference (SI). That is, since the transmission path and the reception path are separated from each other by the distributors D11 and D12, generation of SI that causes interference with the reception signal transmitted along the reception path of the transmission signal transmitted along the transmission path can be suppressed. SI means the interference caused by the transmission signal of the IFD transceiver 100 to its received signal. The SI may be generated by a signal transmitted through the antenna ANT10 of the IFD transceiver 100 to be input to the antenna ANT10 of the IFD transceiver 100 or may be generated by the reflection or leakage on the internal circuit of the IFD transceiver 100 .

Each of the IFD transceiver modules 110 and 120 can simultaneously transmit and receive signals through the antenna ANT10 by using the distributors D11 and D12.

The distributors D11 and D12 may include a circulator, an electrical balance duplexer (EBD), and the like. The EBD may include a hybrid transformer and a balance network.

The analog circuitry of each IFD transceiver module 110 and 120 performs the function of converting an analog received signal from each of the polarization transmitting and receiving units of the antenna ANT10 into a digital received signal. A received signal converted into a digital signal by each analog circuit section is transmitted to a corresponding digital circuit section and processed.

To this end, the analog circuitry of each IFD transceiver module 110, 120 includes low noise amplifiers (LNA11, LNA12), integrators INT11, INT12 and analog to digital converters (ADC11, ADC12) can do.

The low noise amplifiers LNA11 and LNA12 remove noise from the analog reception signals received through the respective polarization transmission and reception units of the antenna ANT10 and amplify the noise-removed analog reception signals and output the amplified analog reception signals to the integrators INT11 and INT12 .

The integrators INT11 and INT12 receive an analog reception signal of a radio frequency (RF) band and convert it into an analog reception signal of a baseband using a carrier frequency signal f _C.

The analog-to-digital converters ADC11 and ADC12 convert an analog reception signal converted from the integrators INT11 and INT12 into a baseband signal into a digital reception signal, and output the analog reception signal to the digital circuitry.

The analog circuitry of each IFD transceiver module 110, 120 performs a function of converting a digital transmission signal from a corresponding digital circuitry to an analog transmission signal. The transmission signals converted into analog signals by the respective analog circuit units are transmitted to the respective polarization transmission and reception units of the antenna ANT10 by the corresponding distributors D11 and D12.

The analog circuitry of each IFD transceiver module 110 and 120 includes a digital to analog converter DAC11 and DAC12, mixers MIX11 and MIX12 and a power amplifier PA11, 0.0 > PA12). ≪ / RTI >

The digital-to-analog converters DAC11 and DAC12 convert a digital transmission signal from the digital circuit portion into an analog transmission signal of a baseband and output the analog transmission signal.

The mixer (MIX11, MIX12) is when the analog signal transmitted from the baseband input from the digital-to-analog converter (DAC11, DAC12), using a carrier frequency signal (f _C) and converts it into an analog transmission signal of the RF band.

The power amplifiers PA11 and PA12 receive analog receive signals converted into RF bands from the mixers MIX11 and MIX12, amplify them, and output them.

The analog transmission signals amplified by the power amplifiers PA11 and PA12 are transmitted to the respective polarization transmission and reception units of the antenna ANT10 through the distributors D11 and D12 and transmitted by the respective polarization transmission and reception units of the antenna ANT10.

The analog circuitry of each IFD transceiver module 110 and 120 is connected to a finite impulse response filter FIR11 to remove the SI that is not removed by the distributors D11 and D12, , FIR 12, and Couplers C11 and C12.

The FIR filters FIR11 and FIR12 use the transmission signals of the IFD transmission and reception modules 110 and 120 to perform interference elimination for eliminating the SI generated by the transmission signals of the IFD transmission and reception modules 110 and 120 Signal.

The FIR filters FIR11 and FIR12 receive the transmission signals of the IFD transmission and reception modules 110 and 120 from the power amplifiers PA11 and PA12 of the IFD transmission and reception modules 110 and 120, 110, and 120, respectively. The interference cancellation signals generated by the FIR filters FIR11 and FIR12 are input to the combiners C11 and C12 of the corresponding IFD transmission and reception modules 110 and 120. [

The couplers C11 and C12 are connected between the dividers D11 and D12 and the low noise amplifiers LNA11 and LNA12 to receive the received signals from the distributors D11 and D12.

The combiners C11 and C12 remove the SI from the received signals using the interference cancellation signals generated by the FIR filters FIR11 and FIR12 and output the signals when the received signals are input from the respective distributors D11 and D12. That is, each of the combiners C11 and C12 removes SI from the received signal by combining the received signal transmitted through each of the distributors D11 and D12 with the interference elimination signal input from the FIR filters FIR11 and FIR12, and outputs the SI.

The received signal whose SI is removed by the couplers C11 and C12 is output to the low noise amplifiers LNA11 and LNA12.

The digital circuit section of each IFD transmission / reception module 110, 120 decodes the digital received signal from the analog circuit section and outputs the received data. In addition, the digital circuitry of each IFD transmission / reception module 110 and 120 encodes the transmission data and outputs a digital transmission signal.

To this end, the digital circuitry of each IFD transceiver module 110, 120 may include a decoder DEC10 and an encoder ENC11, ENC12.

The decoder DEC10 receives the analog receive signal from the analog circuit portions (for example, the analog-to-digital converters ADC11 and ADC12) of the IFD transmitting and receiving modules 110 and 120 and decodes the analog receive signal to output the corresponding receive data.

The encoders ENC11 and ENC12 encode transmission data corresponding to each of the IFD transmission / reception modules 110 and 120 to generate a digital transmission signal. The digital transmission signals generated by the encoders ENC11 and ENC12 are transmitted to analog circuit portions (for example, digital-analog converters DAC11 and DAC21) of the IFD transmission / reception modules 110 and 120, respectively.

The digital circuit portion of the IFD transmission and reception modules 110 and 120 can not be removed from the analog circuit portion and is introduced into the digital circuit portion or the digital interference eliminator (Digital SIC) (DSIC 10) and the digital reference generators (Digital Reference Generator) (DRG11, DRG12).

The digital interference canceller DSIC10 may be connected between the analog circuitry (e.g., analog-to-digital converters ADC11 and ADC12) of the IFD transceiver modules 110 and 120 and the decoder DEC10.

The digital interference eliminator DSIC10 receives digital signals transmitted from the respective analog circuit units (for example, the analog-to-digital converters ADC11 and ADC12) to the decoder DEC10 using the digital transmission signals of the IFD transmission / reception modules 110 and 120, And removes the remaining SI from the received signal.

The digital reception signal input from the analog circuit portion of each IFD transmission and reception module 110 or 120 to the digital interference eliminator DSIC 10 is transmitted to the elements (distributor, summer, A low noise amplifier, an analog-to-digital converter, etc.). As a result, the SI component of the transmission signal flowing into the reception signal is also distorted while being input to the digital circuit section through the reception path.

1, when the digital interference eliminator DSIC 10 receives a digital transmission signal used for the digital SIC from the encoders ENC11 and ENC12, it does not sufficiently remove the distorted SI components through the reception path I can not.

Thus, the digital reference generators DRG11 and DRG12 distort the digital transmission signal output from each of the encoders ENC11 and ENC12 similarly to the distortion on the reception path, and output the distortion to the digital interference eliminator DSIC10. In addition, the digital interference eliminator (DSIC) 10 performs the digital SIC using the digital transmission signals Rv and Rh distorted by the respective digital reference generators DRG11 and DRG12.

1, the IFD transmission / reception modules 110 and 120 share a digital interference canceller (DSIC 10) and a decoder (DEC10). However, the present invention is not limited to this, The DSIC 10 and the decoder DEC10 may be separately implemented for each IFD transmission / reception module 110, 120.

The IFD transceiver 100 according to the first embodiment of the above-described structure can operate as a 2x2 MIMO transceiver. The dual polarized wave antenna ANT10 can simultaneously transmit and receive two different polarized wave signals through the two polarized wave transmitting and receiving units. Therefore, when the IFD transceiver 100 obtains the multiplexing gain or the polarization diversity using the polarized wave signal, 2x2 MIMO can be implemented with only one dual polarized antenna.

Accordingly, when two communication nodes multiplex different data with the vertical polarization signal and the horizontal polarization signal through the IFD transceiver 100 according to the first embodiment and exchange them, the two communication nodes operate in a half-duplex (HD) mode Compared with single-input single-output (SISO) transceivers, up to four times greater link capacity can be achieved than using an SISO transceiver operating in IFD mode.

On the other hand, when a MIMO IFD transceiver is implemented using a plurality of general antennas other than a polarized antenna, if the interval between the antennas can not be sufficiently secured, an FIR filter corresponding to the square of the number of antennas must be used for SI removal in the analog circuit section. If the spacing between the antennas is not sufficiently low, the received signal received via each antenna includes the SI of the transmitted signal transmitted from its antenna as well as the SI of the transmitted signal transmitted by the other antenna. Therefore, in order to perform the analog SIC from the reception signals of the respective antennas, an FIR filter is required as many as the number of paths into which SI is introduced for each antenna, that is, the number of antennas of the IFD transceiver. For example, in a MIMO IFD transceiver that uses two antennas, four adaptive FIR filters are used to remove SI from the analog circuitry.

On the other hand, in the IFD transceiver 100 according to the first embodiment, only one adaptive FIR filter (FIR11, FIR12) is used for each polarization transmitting and receiving unit of the antenna ANT10. This is because the SI introduced from the other polarized wave transmitting / receiving part of the antenna ANT10 is reduced in power so as to be removed by the SIC of the digital circuit part due to the separation gain of the dual polarized wave antenna ANT10, This is because it is enough to use only one adaptive FIR filter for each part to remove its own SI.

In the first embodiment, the antenna is a dual polarized antenna including two different polarized wave transmitting / receiving units. However, the present invention is not limited to this, and thus the polarized wave transmitting / receiving unit The number of negatives may increase further. In this case, the IFD transceiver may further include an IFD transceiver module corresponding to the added polarized transceiver. For example, if the antenna is a triple polarized antenna, the antenna includes three polarization transmitting and receiving sections, and the MIMO IFD transceiver may include three IFD transmitting and receiving modules connected to the three polarization transmitting and receiving sections, respectively.

2 schematically shows an IFD transceiver according to a second embodiment.

2, the IFD transceiver 200 according to the second embodiment includes a tri-polarized antenna ANT20 and a plurality of IFD transceiver modules 210 and 220 connected to an antenna ANT20 230). ≪ / RTI >

The triple-polarized wave antenna ANT20 includes three polarized wave transceivers for transmitting and receiving three different polarized waves (for example, vertical polarization, horizontal polarization, azimuth polarization).

Since the IFD transceiver 200 according to the second embodiment uses the triple-polarized wave antenna ANT20, it includes three IFD transceiver modules 210, 220 and 230 connected to the respective polarized wave transceivers of the triple-polarized wave antenna ANT20 can do. For example, the IFD transceiver 200 includes an IFD transceiver module 210 connected to a vertically polarized transceiver unit of the triple-polarized antenna ANT20, an IFD transceiver module 220 connected to the horizontal polarization transceiver unit, And an IFD transmission / reception module 230 connected thereto.

IFD transceiver modules 210, 220 and 230 transmit and receive polarization signals independently of each other. For example, the IFD transceiver module 210 transmits and receives signals through the vertically polarized transceiver of the triple-polarized antenna ANT20, and the IFD transceiver module 220 transmits and receives signals through the horizontal polarization transceiver of the triple- And the IFD transmission / reception module 230 can transmit and receive signals through the azimuthal polarization transmission / reception unit of the triple-polarized antenna ANT20.

Each IFD transceiver module 210, 220, 230 may include one distributor D21, D22, D23, analog circuitry, and digital circuitry.

LNA 21, LNA 22, and LNA 23, integrators INT21, INT22, and INT23, digital analogue (D / A) converters, (FIR21, FIR22, and FIR23), combiners C21, C22, and C23, a decoder (DEC20), and a decoder ), The encoders ENC21, ENC22 and ENC23, the digital interference eliminator DSIC20 and the digital reference generators DRG21, DRG22 and DRG23 are connected to the IFD transceiver modules 110 and 120 in the first embodiment, The detailed description of each component constituting each of the IFD transmission / reception modules 210, 220 and 230 is omitted below to avoid redundant description.

2, the IFD transmission / reception modules 210, 220 and 230 share the digital interference canceller (DSIC 20) and the decoder (DEC20). However, the present invention is not limited thereto, The decoder may be implemented separately for each IFD transceiver module 210, 220, 230.

The IFD transceiver 200 according to the second embodiment of the above-described structure may operate as a 3x3 MIMO transceiver. The triple-polarized wave antenna ANT20 can simultaneously transmit and receive three different polarized signals through the three polarized wave transmitting / receiving units. Accordingly, when the IFD transceiver 200 obtains the multiplexing gain or the polarization diversity using the polarized wave signal, the 3 × 3 MIMO can be realized with only one triple polarized antenna.

Accordingly, when two communication nodes multiplex and mutually multiplex different data to the vertical polarization signal, the horizontal polarization signal, and the azimuth polarization signal through the IFD transceiver 200 according to the second embodiment, the SISO transceiver , It is possible to secure a link capacity up to 3 times as compared with the case using the SISO transceiver operating in the IFD mode.

In the IFD transceiver 200 according to the second embodiment, only one adaptive FIR filter (FIR21, FIR22, FIR23) is used for SIC for each polarization transmitting and receiving section of the triple-polarized antenna ANT20, Only a total of three FIR filters are used. This is because the SI introduced from the other polarized wave transmitting / receiving part of the antenna ANT20 is reduced in power so as to be removed by the SIC of the digital circuit part due to the separation gain of the triple polarized antenna ANT20, This is because it is enough to use only one adaptive FIR filter for each part to remove its own SI.

As described above, the IFD transceiver 100 200 according to the first and second embodiments implements MIMO using only one multi-polarized antenna. In addition, due to the characteristics of the multi-polarized antenna, the FIR filter used for eliminating the interference between the different polarization transmitting and receiving parts has been omitted. As a result, the complexity of the MIMO IFD transceiver 100. 200 is significantly reduced.

In the first and second embodiments, a MIMO IFD transceiver is implemented using one multi-polarized wave antenna as an example. However, the present invention is not limited thereto, and thus the IFD transceiver according to another embodiment And may include a plurality of multi-polarized antennas for link capacity increase. In this case, the IFD transceiver may further include an FIR filter for eliminating interference between the antennas.

3 schematically shows an IFD transceiver according to a third embodiment.

3, the IFD transceiver 300 according to the third embodiment includes a plurality of double polarized antennas ANT31 and ANT32 and a plurality of IFD transmission / reception modules 310 and 320 connected to the plurality of antennas ANT31 and ANT32. , 330, 340).

Each of the dual polarized wave antennas ANT31 and ANT32 includes two polarized wave transmitting and receiving sections for transmitting and receiving two different polarized waves (for example, vertical polarization and horizontal polarization).

IFD transmission / reception modules 310, 320, 330, and 340 are connected to the polarized wave transmission / reception units included in the dual polarization antennas ANT31 and ANT32, respectively.

3, the IFD transceiver 300 includes four IFD transceiver modules 310, 320, 330, and 340 because it includes two dual polarized antennas ANT31 and ANT32. That is, the IFD transceiver 300 includes an IFD transmission / reception module 310 connected to the vertical polarization transmission / reception unit of the dual polarization antenna ANT31, an IFD transmission / reception module 320 connected to the horizontal polarization transmission / reception unit of the dual polarization antenna ANT31, An IFD transmission / reception module 330 connected to the dual polarization antenna ANT32 vertical polarization transmission / reception unit and an IFD transmission / reception module 340 connected to the horizontal polarization transmission / reception unit of the dual polarization antenna ANT32.

The IFD transmission / reception modules 310, 320, 330, and 340 transmit and receive polarization signals independently of each other. For example, the IFD transceiver module 310 transmits and receives signals through the vertically polarized transceiver of the dual polarized antenna ANT31, and the IFD transceiver module 320 transmits and receives signals through the horizontally polarized transceiver of the dual polarized antenna ANT31. can do. The IFD transceiver module 330 transmits and receives signals through the vertically polarized transceiver of the dual polarized antenna ANT32 and the IFD transceiver module 340 can transmit and receive signals through the horizontally polarized transceiver of the dual polarized antenna ANT32. have.

Each IFD transceiver module 310, 320, 330, 340 may include one distributor D31, D32, D33, D34, analog circuitry, and digital circuitry.

Hereinafter, a part of the constituent elements of the IFD transmission / reception modules 310, 320, 330 and 340, which perform the same functions as those of the IFD transmission / reception modules 110 and 120 according to the first embodiment, And a digital mixer (DAC31, DAC32, DAC33, DAC34), a mixer (integrator) D31, D32, D33, D34, low noise amplifiers LNA31, LNA32, LNA33, LNA34, integrators INT31, INT32, INT33, INT34, FIR filters FIR31, FIR32, FIR33 and FIR34, decoders DEC30, encoders ENC31, ENC32, ENC33 and ENC34, and power amplifiers PA31, PA32, PA33 and PA34, Digital interference eliminator (DSIC 30) and digital reference generators (DRG31, DRG32, DRG33, DRG34)) will not be described in detail in order to avoid redundant description.

3, the IFD transmission / reception modules 310, 320, 330 and 340 share the digital interference canceller (DSIC 30) and the decoder (DEC 30). However, the present invention is not limited thereto, A demultiplexer and a decoder may be separately implemented for each IFD transmission / reception module 310, 320, 330, and 340.

Meanwhile, in the IFD transceiver 300 according to the third embodiment, when the distance between the dual-polarized antennas ANT31 and ANT32 is not sufficient, the dual polarized antennas ANT31 and ANT32 may interfere with each other. That is, when the distance between the dual polarized antennas ANT31 and ANT32 is not sufficient, the transmission signal transmitted through the dual polarized antenna ANT31 may interfere with the reception signal of the dual polarized antenna ANT32, The transmission signal transmitted through the antenna ANT32 interferes with the reception signal of the dual polarization antenna ANT31.

Accordingly, the IFD transceiver 300 according to the third embodiment may further include a plurality of FIR filters (FIR 351, FIR 352, FIR 353, and FIR 354) to eliminate interference between the antennas ANT 31 and ANT 32.

The FIR filters (FIR 351, FIR 352, FIR 353, FIR 354) generate interference cancellation signals to eliminate interference between the polarized wave transceivers that transmit and receive the same polarization.

For example, the FIR filter (FIR351) is configured to detect, from the reception signal received through the vertically polarized wave transmission / reception unit of the dual polarization antenna ANT32, interference caused by the transmission signal transmitted through the vertical polarization transmission / reception unit of the dual polarization antenna ANT31 Lt; / RTI > For example, the FIR filter (FIR) 352 is generated by a transmission signal transmitted from the reception signal received through the horizontal polarization transmitting / receiving unit of the dual polarization antenna ANT32 through the horizontal polarization transmitting / receiving unit of the dual polarization antenna ANT31 And generates an interference cancellation signal for canceling the interference. For example, the FIR filter (FIR) 353 is generated by a transmission signal transmitted through a vertically polarized wave transmission / reception unit of the dual polarization antenna ANT32 from a reception signal received through the vertical polarization transmission / reception unit of the dual polarization antenna ANT31 And generates an interference cancellation signal for canceling the interference. For example, the FIR filter (FIR) 354 is generated by a transmission signal transmitted from the reception signal received through the horizontal polarization transmitting / receiving unit of the dual polarization antenna ANT31 through the horizontal polarization transmitting / receiving unit of the dual polarization antenna ANT32 And generates an interference cancellation signal for canceling the interference.

The interference cancellation signals generated by the FIR filters FIR351, FIR352, FIR353, and FIR354 are input to the combiners C31, C32, C33, and C34. For example, the interference cancellation signal generated by the FIR filter FIR 351 is input to the combiner C33, the interference cancellation signal generated by the FIR filter FIR 352 is input to the combiner C34, and the interference cancellation signal generated by the FIR filter FIR353 The interference cancellation signal generated by the FIR filter FIR 354 can be input to the combiner C32.

The combiners C31, C32, C33 and C34 receive the interference cancellation signal from the FIR filters FIR31, FIR32, FIR33 and FIR34 to remove the SI generated by the transmission signal of the IFD transmission / reception module. The combiners C31, C32, C33 and C34 receive the interference cancellation signal from the FIR filters (FIR 351, FIR 352, FIR 353, FIR 354) for eliminating the SI generated by the transmission signal of the other antenna.

The combiners C31, C32, C33 and C34 receive the interference cancellation signal input from the FIR filters FIR31, FIR32, FIR33 and FIR34 and the FIR And removes SI from the received signal using the interference cancellation signal input from the filters (FIR 351, FIR 352, FIR 353, and FIR 354) and outputs it.

As described above, in the IFD transceiver 300 according to the third embodiment, an FIR filter is used only for eliminating interference between polarized wave transceivers that transmit and receive the same polarized wave. This is because the SI introduced from the polarized wave transmitting and receiving unit transmitting and receiving different polarizations is reduced in power so that it can be removed by the SIC of the digital circuit unit due to the separation gain of the polarized antenna.

Therefore, in the IFD transceiver 300 according to the third embodiment, each of the IFD transmission / reception modules 310, 320, 330, and 340 includes an FIR filter for removing an SI caused by its own transmission signal, An FIR filter for eliminating the SI caused by the transmission signal of the polarized wave transmitting and receiving unit that transmits and receives the same polarized wave, and a total of two FIR filters. Accordingly, in the IFD transceiver 300 according to the third embodiment, only a total of eight FIR filters are used for SI removal.

The IFD transceiver 300 according to the third embodiment of the above-described structure may operate as a 4x4 MIMO transceiver. The two dual polarized antennas ANT31 and ANT32 can simultaneously transmit and receive four polarized signals through the four polarized wave transmitting / receiving units. Therefore, when the IFD transceiver 300 obtains the multiplexing gain or the polarization diversity using the polarized signal, the 4 × 4 MIMO can be implemented with only two dual polarized antennas.

Accordingly, when two communication nodes multiplex and mutually exchange different data into a vertical polarization signal and a horizontal polarization signal through the IFD transceiver 300 according to the third embodiment and use the SISO transceiver operating in the HD mode , It is possible to secure up to 4 times the link capacity as compared with the SISO transceiver operating in the IFD mode up to 8 times.

3 illustrates an example in which the IFD transceiver 300 includes two dual polarized antennas ANT31 and ANT32. However, the present invention is not limited thereto, and the IFD transceiver 300 may include more dual May be modified to include a polarized antenna. In this case, the IFD transceiver 300 includes 2 × N (where N is the number of dual polarized antennas) IFD transceiver modules, and may include 2N ² FIR filters. In addition, the IFD transceiver 300 operates as a 2N x 2N MIMO transceiver, providing up to 4N times as much as when using an SISO transceiver operating in the HD mode, up to 2N times greater than using an SISO transceiver operating in an IFD mode The link capacity can be secured.

4 schematically shows an IFD transceiver according to a fourth embodiment.

4, the IFD transceiver 400 according to the fourth embodiment includes a plurality of triple-polarized antennas ANT41 and ANT42, a plurality of IFD transceiver modules 410 and 420 connected to the plurality of antennas ANT41 and ANT42, , 430, 440, 450, 460).

Each of the triple polarized wave antennas ANT41 and ANT42 includes three polarized wave transmitting and receiving sections for transmitting and receiving three different polarized waves (for example, vertical polarization, horizontal polarization, and azimuth polarization).

IFD transmission / reception modules 410, 420, 430, 440, 450, and 460 are connected to the polarized wave transmission / reception units constituting the triple polarized wave antennas ANT41 and ANT42, respectively.

4, the IFD transceiver 400 includes six IFD transceiver modules 410, 420, 430, 440, 450, and 460, including two triple-polarized antennas ANT31 and ANT32. That is, the IFD transceiver 400 includes an IFD transmission / reception module 410 connected to the vertical polarization transmission / reception unit of the triple-polarized wave antenna ANT41, an IFD transmission / reception module 420 connected to the horizontal polarization transmission / reception unit of the triple- An IFD transceiver module 430 connected to the azimuthal polarization transceiver of the triple polarized antenna ANT41, an IFD transceiver module 440 connected to the triple polarized antenna ANT42 vertically polarized transceiver, a horizontal polarization of the triple polarized antenna ANT42, An IFD transmission / reception module 450 connected to the transmission / reception unit and an IFD transmission / reception module 460 connected to the azimuthal polarization transmission / reception unit of the triple polarized antenna ANT42.

The IFD transmission / reception modules 410, 420, 430, 440, 450, and 460 transmit and receive polarization signals independently of each other. For example, the IFD transmission / reception module 410 transmits / receives a signal through the vertically polarized transmission / reception unit of the triple-polarized antenna ANT41, and the IFD transmission / reception module 420 transmits and receives a signal through the horizontal polarization transmission / reception unit of the triple- And the IFD transmission / reception module 430 can transmit and receive signals through the azimuthal polarization transmission / reception unit of the triple-polarized antenna ANT41. The IFD transmission and reception module 440 transmits and receives signals through the vertical polarization transmission and reception unit of the triple-polarized wave antenna ANT 42. The IFD transmission and reception module 450 transmits and receives signals through the horizontal polarization transmission and reception unit of the triple- The IFD transceiver module 460 may transmit and receive signals through the azimuthal polarization transceiver of the triple-polarized antenna ANT42.

Each IFD transceiver module 410, 420, 430, 440, 450, 460 may include one distributor D41, D42, D43, D44, D45, D46, analog circuitry and digital circuitry.

Hereinafter, the same functions as the components of the IFD transmission / reception modules 110 and 120 according to the first embodiment of the components constituting each of the IFD transmission / reception modules 410, 420, 430, 440, 450 and 460 will be described. L42, LNA44, LNA45, LNA46), integrators (INT41, INT42, INT43, INT44, INT45, INT46, ), Digital analog converters (DAC41, DAC42, DAC43, DAC44, DAC45, DAC46), mixers (MIX41, MIX42, MIX43, MIX44, MIX45, MIX46), power amplifiers PA41, PA42, PA43, PA44, PA45, PA46, The digital interference eliminator (DSIC) 40 and the digital reference generators DRG41, DRC41, ENC42, ENC42, ENC42, ENC42, ENC44, ENC45, ENC46, FIR filters FIR41, FIR42, FIR43, FIR44, FIR45, FIR46, DRG42, DRG43, DRG44, DRG45, and DRG46) will not be described in detail in order to avoid redundant description.

4, the IFD transmission / reception modules 410, 420, 430, 440, 450 and 460 share a digital interference canceller (DSIC 40) and a decoder (DEC 40). However, the present invention is not limited thereto Now, a digital interference canceller and a decoder may be separately implemented for each IFD transmission / reception module 410, 420, 430, 440, 450, 460.

On the other hand, if the distance between the triple-polarized antennas ANT41 and ANT42 is not sufficient in the IFD transceiver 400 according to the fourth embodiment, the triple-polarized antennas ANT41 and ANT42 may interfere with each other. That is, when the distance between the triple-polarized antennas ANT41 and ANT42 is not sufficient, the transmission signal transmitted through the triple-polarized wave antenna ANT41 may interfere with the reception signal of the triple-polarized wave antenna ANT42, The transmission signal transmitted through the antenna ANT42 interferes with the reception signal of the triple-polarized wave antenna ANT41.

Therefore, the IFD transceiver 400 according to the fourth embodiment may further include a plurality of FIR filters (FIR 471, FIR 472, FIR 473, FIR 474, FIR 475, and FIR 476) to eliminate interference between the antennas ANT 41 and ANT 42 .

FIR filters (FIR 471, FIR 472, FIR 473, FIR 474, FIR 475, FIR 476) generate interference cancellation signals to eliminate interference between the polarized wave transceivers that transmit and receive the same polarization.

For example, the FIR filter (FIR 471) is configured to receive, from the reception signal received through the vertically polarized wave transmission / reception unit of the triple-polarized wave antenna ANT42, interference caused by the transmission signal transmitted through the vertical polarization transmission / reception unit of the triple- Lt; / RTI > For example, the FIR filter (FIR 472) is generated by a transmission signal transmitted through a horizontal polarization transmitting / receiving unit of the triple-polarized wave antenna ANT41 from a reception signal received through the horizontal polarization transmitting / receiving unit of the triple-polarized wave antenna ANT42 And generates an interference cancellation signal for canceling the interference. For example, the FIR filter FIR 473 is generated by a transmission signal transmitted through an azimuth-polarized wave transmission / reception unit of the triple-polarized wave antenna ANT41 from a reception signal received through the azimuth-polarized wave transmission / reception unit of the triple-polarized wave antenna ANT42 And generates an interference cancellation signal for canceling the interference.

For example, the FIR filter (FIR 474) is generated by a transmission signal transmitted through a vertically polarized wave transmission / reception unit of the triple-polarized wave antenna ANT 42 from a reception signal received through the vertical polarization transmission / reception unit of the triple- And generates an interference cancellation signal for canceling the interference. For example, the FIR filter (FIR475) is generated by the transmission signal transmitted through the horizontal polarization transmitting / receiving unit of the triple-polarized wave antenna ANT42 from the reception signal received through the horizontal polarization transmitting / receiving unit of the triple-polarized wave antenna ANT41 And generates an interference cancellation signal for canceling the interference. For example, the FIR filter (FIR 476) is generated by a transmission signal transmitted from the reception signal received through the azimuth-and-polarity wave transmission / reception unit of the triple-polarized wave antenna ANT41 through the azimuth-polarized wave transmission / reception unit of the triple- And generates an interference cancellation signal for canceling the interference.

The interference cancellation signals generated by the FIR filters FIR471, FIR472, FIR473, FIR474, FIR475 and FIR476 are input to the respective couplers C41, C42, C43, C44, C45 and C46. For example, the interference cancellation signal generated by the FIR filter FIR471 is input to the combiner C44, the interference cancellation signal generated by the FIR filter FIR472 is input to the combiner C45, and the interference cancellation signal generated by the FIR filter FIR473 The interference elimination signal generated by the FIR filter FIR 474 is input to the combiner C41 and the interference elimination signal generated by the FIR filter FIR 475 is input to the combiner C42. And the interference cancellation signal generated by the FIR filter FIR 476 may be input to the combiner C43.

The combiners C41, C42, C43, C44, C45 and C46 are used for removing the SI generated by the transmission signal of the IFD transmission / reception module from the FIR filters FIR41, FIR42, FIR43, FIR44, FIR45, And receives an interference cancellation signal. In addition, the combiners C41, C42, C43, C44, C45, and C46 receive interference from other FIR filters (FIR471, FIR472, FIR473, FIR474, FIR475, FIR476) And receives a removal signal.

FIR filters FIR41, FIR42, FIR43, FIR44, FIR44, F44, and F46 are connected to the combiners C41, C42, C43, C44, C45, and C46 when receiving signals from the respective distributors D41, D42, D43, D44, D45, (FIR 471, FIR 472, FIR 473, FIR 474, FIR 475, and FIR 476) input from the FIR 45 and the FIR 46 and the interference cancellation signal input from the FIR filters FIR 471, FIR 472,

As described above, in the IFD transceiver 400 according to the fourth embodiment, an FIR filter is used only for eliminating interference between polarized wave transceivers that transmit and receive the same polarized wave. This is because the SI introduced from the polarized wave transmitting and receiving unit transmitting and receiving different polarizations is reduced in power so that it can be removed by the SIC of the digital circuit unit due to the separation gain of the polarized antenna.

Therefore, in the IFD transceiver 400 according to the fourth embodiment, each of the IFD transmission / reception modules 410, 420, 430, 440, 450, and 460 includes an FIR filter for eliminating SI generated by its own transmission signal, An FIR filter for removing the SI caused by the transmission signal of the polarized wave transmitting and receiving unit transmitting and receiving the same polarized wave from the antenna, and a total of two FIR filters are required. Accordingly, in the IFD transceiver 400 according to the fourth embodiment, only a total of 12 FIR filters are used for SI removal.

The IFD transceiver 400 according to the fourth embodiment of the above-described structure may operate as a 6x6 MIMO transceiver. Two triple polarized antennas ANT41 and ANT42 can simultaneously transmit and receive six polarized signals through the six polarized wave transmitting / receiving units. Therefore, when the IFD transceiver 400 obtains the multiplexing gain or the polarization diversity using the polarized wave signal, the 6 × 6 MIMO can be realized with only two triple polarized antennas.

Accordingly, when two communication nodes multiplex and mutually multiplex different data to a vertical polarization signal, a horizontal polarization signal, and an azimuth polarization signal through the IFD transceiver 400 according to the fourth embodiment, the SISO transceiver , It is possible to obtain a link capacity of up to 6 times as compared with the case of using the SISO transceiver operating in the IFD mode.

4 illustrates an example in which the IFD transceiver 400 includes two triple polarized antennas ANT41 and ANT42, the present invention is not limited thereto, and the IFD transceiver 400 may include more triple- May be modified to include a polarized antenna. In this case, the IFD transceiver 400 includes 3 × N (where N is the number of triple-polarized antennas) IFD transceiver modules and may include 3 N ² FIR filters. Also, the IFD transceiver 400 operates as a 3N x 3N MIMO transceiver, providing up to 9N times as much as when using an SISO transceiver operating in the HD mode, and up to 3N times greater than using an SISO transceiver operating in an IFD mode. The link capacity can be secured.

In the third and fourth embodiments, when a plurality of multi-polarized antennas are used, the present invention further includes an FIR filter for removing SI between different multi-polarized antennas. However, The FIR filter for SI removal between different antennas may be omitted even if the IFD transceiver uses a plurality of multiple polarized antennas. In the case of a transceiver apparatus having a relatively small size restriction of a transceiver such as a base station and a repeater of a cellular system and sufficiently ensuring a gap between the antennas, the distance between the antennas is designed to be sufficiently large, The input SI is reduced to such an extent that the power thereof can be removed by the SIC in the digital circuit portion. In this case, the FIR filter for SI removal between different antennas may be omitted even if the IFD transceiver uses a plurality of multiple polarized antennas.

5 schematically shows an IFD transceiver according to a fifth embodiment.

5, the IFD transceiver 500 according to the fifth embodiment includes a plurality of dual polarized antennas ANT51 and ANT52 and a plurality of IFD transceiver modules 510 and 520 connected to the plurality of antennas ANT51 and ANT52 , 530, 540).

Each of the dual polarized wave antennas ANT51 and ANT52 includes two polarized wave transmitting and receiving sections for transmitting and receiving two different polarized waves (for example, vertical polarization and horizontal polarization).

IFD transmission / reception modules 510, 520, 530, and 540 are connected to the polarized wave transmission / reception units constituting the dual polarization antennas ANT51 and ANT52, respectively.

In FIG. 3, the IFD transceiver 500 includes four IFD transceiver modules 510, 520, 530, and 540, including two dual polarized antennas ANT51 and ANT52. That is, the IFD transceiver 500 includes an IFD transmission / reception module 510 connected to the vertical polarization transmission / reception unit of the dual polarization antenna ANT51, an IFD transmission / reception module 520 connected to the horizontal polarization transmission / reception unit of the dual polarization antenna ANT51, An IFD transceiver module 530 connected to the dual polarized wave antenna ANT52 vertical polarization transmitter and receiver and an IFD transceiver module 540 connected to the horizontal polarization transceiver of the dual polarized antenna ANT52.

The IFD transceiver modules 510, 520, 530, and 540 transmit and receive polarized signals independently of each other. For example, the IFD transceiver module 510 transmits / receives a signal through the vertically polarized transceiver of the dual polarized antenna ANT51, and the IFD transceiver module 520 transmits / receives a signal through the horizontally polarized transceiver of the dual polarized antenna ANT51. can do. The IFD transmission and reception module 530 transmits and receives signals through the vertical polarization transmission and reception unit of the dual polarization antenna ANT52 and the IFD transmission and reception module 540 can transmit and receive signals through the horizontal polarization transmission and reception unit of the dual polarization antenna ANT52 have.

Each IFD transceiver module 510, 520, 530, 540 may include one distributor D51, D52, D53, D54, analog circuitry, and digital circuitry.

In the following description, a part of the constituent elements of the IFD transmission / reception modules 510, 520, 530 and 540, which perform the same functions as those of the IFD transmission / reception modules 110 and 120 according to the first embodiment, And a digital mixer (DAC51, DAC52, DAC53, DAC54), an integrator (INT51, INT52, INT53, INT54) FIR filters FIR51, FIR52, FIR53 and FIR54, decoders DEC50, encoders ENC51, ENC52, ENC53 and ENC54, and power amplifiers PA51, PA52, PA53 and PA54, Digital interference eliminator (DSIC 50) and digital reference generators (DRG51, DRG52, DRG53, DRG54)) will not be described in detail in order to avoid redundant description.

5, the IFD transmission / reception modules 510, 520, 530 and 540 share a digital interference canceller (DSIC 50) and a decoder (DEC 50). However, the present invention is not limited thereto, A remover and a decoder may be separately implemented for each IFD transmission / reception module 510, 520, 530, 540.

In the IFD transceiver 500 according to the fifth embodiment, unlike the IFD transceiver 300 of FIG. 3, when the distance between the dual polarized antennas ANT51 and ANT52 is sufficiently secured, the FIR The filter may be omitted.

Therefore, in the IFD transceiver 500 according to the fifth embodiment, each IFD transmission / reception module 510, 520, 530, and 540 includes only one FIR filter for removing the SI caused by its own transmission signal. Accordingly, in the IFD transceiver 500 according to the fifth embodiment, only four FIR filters are used for SI removal.

The IFD transceiver 500 according to the fifth embodiment of the above-described structure may operate as a 4x4 MIMO transceiver. The two dual polarized antennas ANT51 and ANT52 can simultaneously transmit and receive four polarized signals through the four polarized wave transmitting / receiving units. Therefore, when the IFD transceiver 500 obtains the multiplexing gain or the polarization diversity using the polarized signal, the 4 × 4 MIMO can be implemented with only two dual polarized antennas.

Accordingly, when two communication nodes multiplex and multiplex different data to a vertical polarization signal and a horizontal polarization signal through the IFD transceiver 500 according to the fifth embodiment and use the SISO transceiver operating in the HD mode , It is possible to secure up to 4 times the link capacity as compared with the SISO transceiver operating in the IFD mode up to 8 times.

Although the IFD transceiver 500 includes two dual polarized antennas ANT51 and ANT52 in FIG. 5, the present invention is not limited thereto, and the IFD transceiver 500 may include more dual May be modified to include a polarized antenna. In this case, the IFD transceiver 500 includes 2 × N (where N is the number of dual polarized antennas) IFD transceiver modules and may include 2N FIR filters. Also, the IFD transceiver 500 operates as a 2N x 2N MIMO transceiver, providing up to 4N times as much as when using an SISO transceiver operating in the HD mode, up to 2N times greater than using an SISO transceiver operating in an IFD mode The link capacity can be secured.

6 schematically shows an IFD transceiver according to a sixth embodiment.

6, the IFD transceiver 600 according to the sixth embodiment includes a plurality of triple-polarized antennas ANT61 and ANT62 and a plurality of IFD transceiver modules 610 and 620 connected to the plurality of antennas ANT61 and ANT62 , 630, 640, 650, 660).

Each of the triple polarized wave antennas ANT61 and ANT62 includes three polarized wave transceivers for transmitting and receiving three different polarized waves (for example, vertical polarization, horizontal polarization, and azimuth polarization).

IFD transmission / reception modules 610, 620, 630, 640, 650, and 660 are connected to the polarized wave transmission / reception units constituting the triple polarized wave antennas ANT61 and ANT62, respectively.

6, the IFD transceiver 600 includes six IFD transceiver modules 610, 620, 630, 640, 650, and 660 since it includes two triple-polarized antennas ANT31 and ANT32. That is, the IFD transceiver 600 includes an IFD transmission / reception module 610 connected to the vertical polarization transmission / reception unit of the triple-polarized wave antenna ANT61, an IFD transmission / reception module 620 connected to the horizontal polarization transmission / reception unit of the triple- An IFD transmission and reception module 630 connected to the azimuthal polarization transmission and reception unit of the triple polarized wave antenna ANT61, an IFD transmission and reception module 640 connected to the triple polarized wave antenna ANT62 vertical polarized wave transmission and reception unit, And an IFD transmission / reception module 660 connected to the IFD transmission / reception module 650 connected to the transmission / reception unit and the azimuthal polarization transmission / reception unit of the triple polarized antenna ANT62.

IFD transmission / reception modules 610, 620, 630, 640, 650, and 660 transmit and receive polarization signals independently of each other. For example, the IFD transceiver module 610 transmits and receives signals through the vertically polarized transceiver of the triple-polarized antenna ANT61, and the IFD transceiver module 620 transmits and receives signals through the horizontal polarization transceiver of the triple- And the IFD transmission / reception module 630 can transmit and receive signals through the azimuthal polarization transmission / reception unit of the triple-polarized antenna ANT61. The IFD transceiver module 640 transmits and receives signals through the vertical polarization transmitter and receiver of the triple-polarized antenna ANT62 and the IFD transceiver module 650 transmits and receives signals through the horizontal polarization transceiver of the triple- The IFD transceiver module 660 can transmit and receive signals through the azimuthal polarization transceiver of the triple-polarized antenna ANT62.

Each IFD transceiver module 610, 620, 630, 640, 650, 660 may include one distributor D61, D62, D63, D64, D65, D66, analog circuitry and digital circuitry.

Hereinafter, the same functions as those of the IFD transmission / reception modules 110 and 120 according to the first embodiment will be described with respect to the components constituting the IFD transmission / reception modules 610, 620, 630, 640, 650 and 660 LNA 64, LNA 64, LNA 65, LNA 66), integrators (INT61, INT62, INT63, INT64, INT65, INT66 The power amplifiers PA61, PA62, PA63, PA64, PA65 and PA66, and the mixers MIX61, MIX62, MIX63, MIX64, MIX65 and MIX66, The digital interference eliminator (DSIC 60) and the digital reference generators (DRG 61, ENC 62, ENC 62, ENC 63, ENC 62, ENC 66, ENC 61, ENC 62, ENC 66), the FIR filters (FIR 61, FIR 62, FIR 63, FIR 64, FIR 65, FIR 66) DRG62, DRG63, DRG64, DRG65, and DRG66), detailed description thereof will be omitted to avoid redundant description.

6, the IFD transmission / reception modules 610, 620, 630, 640, 650, and 660 share the digital interference canceller (DSIC 60) and the decoder (DEC 60). However, the present invention is not limited thereto Now, a digital interference canceller and a decoder may be separately implemented for each IFD transceiver module 610, 620, 630, 640, 650, 660.

In the IFD transceiver 600 according to the sixth embodiment, when the distance between the triple-polarized antennas ANT61 and ANT62 is secured, unlike the IFD transceiver 400 of FIG. 4, the antennas ANT61 and ANT62 The FIR filter may be omitted to eliminate interference.

Accordingly, in the IFD transceiver 600 according to the sixth embodiment, each of the IFD transceiver modules 610, 620, 630, 640, 650, and 660 has only one FIR filter for removing SI generated by its own transmission signal in need. Accordingly, in the IFD transceiver 600 according to the sixth embodiment, only six FIR filters are used for SI removal.

The IFD transceiver 600 according to the sixth embodiment of the above-described structure may operate as a 6x6 MIMO transceiver. The two triple-polarized antennas ANT61 and ANT62 can simultaneously transmit and receive six polarized signals through the six polarized transceivers. Therefore, when the IFD transceiver 600 obtains the multiplexing gain or the polarization diversity by using the polarized signal, 6 × 6 MIMO can be realized by only two triple polarized antennas.

Accordingly, when two communication nodes multiplex and multiplex different data to the vertical polarization signal, the horizontal polarization signal and the azimuth polarization signal through the IFD transceiver 600 according to the sixth embodiment, the SISO transceiver , It is possible to obtain a link capacity of up to 6 times as compared with the case of using the SISO transceiver operating in the IFD mode.

6 illustrates an example in which the IFD transceiver 600 includes two triple-polarized antennas ANT61 and ANT62, the present invention is not limited thereto, and the IFD transceiver 600 may include more triple- May be modified to include a polarized antenna. In this case, the IFD transceiver 600 includes 3 × N (where N is the number of triple-polarized antennas) IFD transceiver modules and may include 3N FIR filters. In addition, the IFD transceiver 600 operates as a 3Nx3N MIMO transceiver and provides up to 9N times as much as the SISO transceiver operating in the HD mode, up to 3N times the SISO transceiver operating in the IFD mode The link capacity can be secured.

Meanwhile, in the case of a transceiver capable of ensuring a sufficient distance between antennas such as a base station and a repeater of a cellular system, even when a MIMO IFD transceiver is implemented using a plurality of non-polarized antennas, The FIR filter for SI removal may be omitted.

7 schematically shows an IFD transceiver according to a seventh embodiment.

Referring to FIG. 7, the IFD transceiver 700 according to the seventh embodiment includes a plurality of non-polarized antennas ANT71, ANT72, and ANT73, and a plurality of IFD transceiver modules (ANT71, ANT72, ANT73) 710, 720, 730).

In FIG. 4, the IFD transceiver 700 includes three IFD transceiver modules 710, 720, and 730, which include three antennas ANT71, ANT72, and ANT73, respectively. That is, the IFD transceiver 700 includes an IFD transmission / reception module 710 connected to the antenna ANT71, an IFD transmission / reception module 720 connected to the antenna ANT72, and an IFD transmission / reception module 730 connected to the antenna ANT73 .

The IFD transceiver modules 710, 720, and 730 transmit and receive signals independently of each other. For example, the IFD transmission / reception module 710 transmits and receives signals via the antenna ANT71, the IFD transmission and reception module 720 transmits and receives signals via the antenna ANT72, and the IFD transmission and reception module 730 transmits the signals via the antenna ANT73 ). ≪ / RTI >

Each IFD transceiver module 710, 720, 730 may include one distributor D71, D72, D73, analog circuitry, and digital circuitry.

Hereinafter, some of the constituent elements of the IFD transmission / reception modules 710, 720 and 730, which perform the same function as those of the IFD transmission / reception modules 110 and 120 according to the first embodiment The mixers MIX71, MIX72 and MIX73, the power amplifiers D51, D52 and D53, the low noise amplifiers LNA71 and LNA72, the LNA73, the integrators INT71, INT72 and INT73, the digital analog converters DAC71, DAC72 and DAC73, DRC72, and DRG73), the digital interference generators (DR71, DR72, DR73), the digital interference generators (DR71, DR72, DR73) , A detailed description thereof will be omitted in order to avoid redundant description.

7, the IFD transmission / reception modules 710, 720 and 730 share the digital interference canceller (DSIC 70) and the decoder (DEC 70). However, the present invention is not limited thereto, Decoder may be separately implemented for each IFD transmission / reception module 710, 720, 730.

On the other hand, in the IFD transceiver 700 according to the seventh embodiment, when the distance between the dual polarized antennas ANT71, ANT72 and ANT73 is sufficiently secured, the FIR filter can be omitted to eliminate the interference between the antennas.

Therefore, in the IFD transceiver 700 according to the seventh embodiment, each IFD transmission / reception module 710, 720, 730 includes only one FIR filter for removing the SI caused by its own transmission signal. Accordingly, in the IFD transceiver 700 according to the seventh embodiment, only three FIR filters are used for SI removal.

The embodiment of the present invention is not limited to the above-described apparatus and / or method, but may be applied to a program recorded on a recording medium or a recording medium on which the program is recorded to realize a function corresponding to the configuration of the embodiment of the present invention And the present invention can be easily implemented by those skilled in the art from the description of the embodiments described above.

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, It belongs to the scope of right.

Claims (20)

A first multi-polarized wave antenna including a plurality of first polarized wave transmission / reception units transmitting / receiving different polarized waves, and
And a plurality of first transmission antennas that are connected to the plurality of first polarization transmission and reception units and receive first reception signals through the plurality of first polarization separation transmission and reception units and that transmit first transmission signals through the plurality of first polarization separation transmission and reception units, Receiving module,
Each of the first transmission /
Receiving unit converts the first analog received signal received through the corresponding first polarized wave transmitting and receiving unit into a first digital received signal and converts the first digital transmitted signal into a first analog transmitted signal, A first analog circuit portion including a first finite impulse response filter that removes magnetic interference from a first analog received signal, and
And the first analog circuit receives the first analog signal received from the first polarized wave transmission / reception unit and transmits the first analog signal received from the first analog circuit unit to the corresponding first polarized wave transmission / reception unit Band duplex transceiver. ≪ RTI ID = 0.0 > A < / RTI > The method of claim 1,
Wherein the first finite impulse response filter generates the first interference cancellation signal using the first analog transmission signal,
Wherein the first analog circuitry further comprises a first summer that sums the first interference cancellation signal with the first analog receive signal to remove the magnetic interference from the first analog receive signal. 3. The method of claim 2,
Wherein the first analog circuit unit comprises:
A low noise amplifier for amplifying and outputting the first analog reception signal from which the magnetic interference is removed by the first summer,
And an analog-to-digital converter for converting the first analog received signal amplified by the low noise amplifier to the first digital received signal. 4. The method of claim 3,
Wherein the first analog circuit unit comprises:
A digital to analog converter for converting the first digital transmission signal into the first analog transmission signal,
And a power amplifier for amplifying the first analog transmission signal converted by the digital-to-analog converter and outputting the amplified first analog transmission signal to the first distributor and the first finite impulse response filter. The method of claim 1,
Each of the first transmission /
Further comprising a digital circuit section for decoding the first digital received signal to output first received data, and encoding the first transmitted data to generate the first digital transmitted signal. The method of claim 5,
The digital circuit unit includes:
Further comprising a digital magnetic interference canceller to remove magnetic interference from the first digital received signal using the first digital transmit signal. The method of claim 6,
The digital circuit unit includes:
And an encoder for encoding the first transmission data and outputting the first digital transmission signal. 8. The method of claim 7,
The digital circuit unit includes:
Further comprising a digital reference generator for distorting the first digital transmission signal output from the encoder based on a distortion on a reception path of the first transmission / reception module and outputting the distortion to the digital magnetic interference eliminator,
Wherein the digital magnetic interference canceller removes magnetic interference from the first digital received signal using the first digital transmit signal distorted by the digital reference generator. The method according to claim 6,
The digital circuit unit includes:
And a decoder for decoding the first digital received signal from which the magnetic interference is removed by the digital interference canceller and outputting the first received data. The method of claim 1,
A second multi-polarized wave antenna including a plurality of second polarized wave transmission / reception units for transmitting / receiving different polarized waves, and
And a plurality of second polarized wave transmitting and receiving units connected respectively to the plurality of second polarized wave transmitting and receiving units and receiving second received signals through the plurality of second polarized wave transmitting and receiving units and transmitting second transmission signals through the plurality of second polarized wave transmitting and receiving units, Receiving module,
Each of the second transmission /
Receiving unit converts the second analog received signal received through the corresponding second polarized wave transmitting / receiving unit into a second digital received signal, converts the second digital transmitted signal into a second analog transmitted signal, A second analog circuit portion including a second finite impulse response filter that removes magnetic interference from a second analog received signal, and
And the second analog transmission circuit receives the second analog transmission signal input from the second analog circuit unit and transmits the second analog transmission signal received from the corresponding second polarization transmission and reception unit to the second analog circuit unit, And a second splitter to transmit the same. 11. The method of claim 10,
Wherein the second finite impulse response filter generates the second interference cancellation signal using the second analog transmission signal,
Wherein the second analog circuitry further comprises a second summer that sums the second interference cancellation signal with the second analog receive signal to remove the magnetic interference from the second analog receive signal. 12. The method of claim 11,
Receiving section from the second analog reception signal of the second polarized wave transmission and reception section transmitting and receiving the same polarized wave as the corresponding first polarized transmission and reception section of the plurality of second polarized wave transmission and reception sections using the first analog transmission signal, A third finite impulse response filter for canceling interference of the transmitting and receiving unit, and
Receiving unit that transmits and receives the same polarized wave as that of the corresponding one of the plurality of first polarized wave transmitting / receiving units using the second analog transmitting signal, from the first analog receiving signal of the first polarized transmitting / And a fourth finite impulse response filter that removes the interference of the transmitting and receiving unit. The method of claim 12,
Wherein the third finite impulse response filter generates the third interference cancellation signal using the first analog transmission signal,
And the second summing unit removes the interference of the corresponding first polarized wave transmitting / receiving unit by adding the third interference cancellation signal to the second analog received signal. The method of claim 12,
Wherein the fourth finite impulse response filter generates the fourth interference cancellation signal using the first analog transmission signal,
And the first summing unit sums the fourth interference cancellation signal with the first analog reception signal to remove the interference of the corresponding second polarized wave transmission / reception unit. A plurality of polarized wave antennas including a plurality of polarized wave transmitting and receiving sections for transmitting and receiving a plurality of polarized waves,
A plurality of transceiver modules connected to the plurality of polarized wave transceivers for receiving signals through the plurality of polarized wave transceivers and for transmitting transmission signals through the plurality of polarized wave transceivers,
And a plurality of first finite impulse response filters for eliminating interference between the polarized wave transmitting and receiving units transmitting and receiving the same polarized wave from each other in the plurality of polarized wave antennas using the transmission signals. 16. The method of claim 15,
Each transmission /
A second finite element that converts an analog received signal received through a corresponding polarized wave transceiver into a digital received signal, converts the digital transmitted signal into an analog transmit signal, and removes magnetic interference from the analog receive signal using the analog transmit signal, An analog circuit portion including an impulse response filter, and
And a divider for delivering the analog received signal input from the corresponding polarized wave transmitting and receiving section to the analog circuit section and transmitting the analogue transmitting signal input from the analog circuit section to the corresponding polarized wave transmitting and receiving section. 17. The method of claim 16,
Wherein the first finite impulse response filter comprises:
Reception unit using the transmission signals of the first and second polarization transmission and reception units among the transmission and reception units transmitting and receiving the same polarized wave to and from the first and second polarization transmission and reception units. 17. The method of claim 16,
Each of the transmission /
Further comprising a digital circuit section for decoding the digital received signal to output received data, and encoding the transmitted data to generate the digital transmitted signal. The method of claim 18,
The digital circuit unit includes:
Further comprising a digital magnetic interference canceller to remove magnetic interference from the digital received signal using the digital transmit signal. 20. The method of claim 19,
The digital circuit unit includes:
An encoder for encoding the transmission data and outputting the digital transmission signal;
Further comprising a digital reference generator for distorting the digital transmission signal output from the encoder based on a distortion on a reception path of the transmission / reception module and outputting the distortion to the digital magnetic interference eliminator,
Wherein the digital magnetic interference canceller removes magnetic interference from the digital received signal using the digital transmit signal distorted by the digital reference generator.

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