KR101803629B1 - Transmission apparatus performing selective beamforming using multiple stream transmission circuit and transmission method thereof - Google Patents

Transmission apparatus performing selective beamforming using multiple stream transmission circuit and transmission method thereof Download PDF

Info

Publication number
KR101803629B1
KR101803629B1 KR1020160021690A KR20160021690A KR101803629B1 KR 101803629 B1 KR101803629 B1 KR 101803629B1 KR 1020160021690 A KR1020160021690 A KR 1020160021690A KR 20160021690 A KR20160021690 A KR 20160021690A KR 101803629 B1 KR101803629 B1 KR 101803629B1
Authority
KR
South Korea
Prior art keywords
impedance
signal
loading
circuit
beamforming
Prior art date
Application number
KR1020160021690A
Other languages
Korean (ko)
Other versions
KR20170099530A (en
Inventor
최일도
이경태
이주용
Original Assignee
한국과학기술원
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 한국과학기술원 filed Critical 한국과학기술원
Priority to KR1020160021690A priority Critical patent/KR101803629B1/en
Publication of KR20170099530A publication Critical patent/KR20170099530A/en
Application granted granted Critical
Publication of KR101803629B1 publication Critical patent/KR101803629B1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0689—Hybrid systems, i.e. switching and simultaneous transmission using different transmission schemes, at least one of them being a diversity transmission scheme
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0697—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using spatial multiplexing
    • 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
    • H04L25/0264—Arrangements for coupling to transmission lines
    • H04L25/0278—Arrangements for impedance matching
    • 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
    • H04L25/0264—Arrangements for coupling to transmission lines
    • H04L25/028—Arrangements specific to the transmitter end

Abstract

A radio transmitting apparatus comprising at least one parasitic antenna and at least one active antenna for a beam-space MIMO system is disclosed. The wireless transmission apparatus includes a modem circuit for outputting a signal to be transmitted through multiple stream transmission or beamforming and a control for generating a multiple stream signal or a beamforming signal according to a transmission mode of the modem circuit A plurality of parasitic antennas for receiving the plurality of parasitic antennas, a control circuit for selectively applying a plurality of parasitic antennas to the plurality of parasitic antennas, And an impedance loading circuit for loading an impedance corresponding to the active antenna.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission apparatus and a transmission apparatus for performing selective beamforming using a multi-

The present invention relates to a wireless transmission apparatus and a method thereof. More particularly, the present invention relates to a wireless transmission apparatus and method for performing selective beamforming using a multi-stream transmission circuit.

In general, a communication system based on a voice communication service uses a single input single output (SISO) system using only a single antenna element in narrow frequency band characteristics within a limited frequency range. However, a SISO system using a single antenna has a narrow band There was a great deal of difficulty in transmitting large amounts of data at high speed within a channel.

Thus, a MIMO (Multiple Input Multiple Output) technique has emerged as a next generation wireless transmission technology that enables the data transmission / reception ratio to be transmitted with a lower error probability by independently driving each antenna using a plurality of antennas.

However, the MIMO technique that improves the data rate using a general array antenna increases the complexity of the hardware and increases the power consumption when the antenna is extended to improve the data rate.

This is why it is difficult to expand the MIMO system considering the limited size and power consumption requirements of the mobile terminal.

Accordingly, a beam space MIMO (Beamspace MIMO) technique using an electronically steerable passive array radiator (ESPAR) has appeared. This is achieved by using an ESPAR antenna having a parasitic element disposed around an active element, To overcome the limitations of the MIMO system.

In a beam space MIMO system, one active antenna and a plurality of parasitic antennas are coupled to each other to form a beam pattern. Specifically, the power is applied to the active antenna using only a power amplifier for feeding the active antenna, the parasitic antenna disposed around the active antenna transmits power through mutual coupling, and the impedance value loaded on the parasitic antenna In this case, it is necessary to load an impedance value for flowing a desired current to the antenna. In particular, it is necessary to keep the impedance value to be loaded by the active antenna at 50 Ω at all times.

The beam space MIMO system uses single-RF and has various advantages. However, since the system operates based on the coupling between the antennas, the performance is determined according to the sensitivity of the coupling between the antennas . The coupling between the antennas can be defined by a parameter called Z-matrix. Since this value can easily change according to the environment around the antenna, there is a disadvantage that the stability of the antenna end is not guaranteed.

Accordingly, in the beam space MIMO system, the RF stage is connected not only to the active antenna but also to the parasitic antenna, and the load-modulated beam space (MIMO), in which the impedance loading circuits all share one power amplifier ) System is emerging. In this case, as compared with the beam space (MIMO) method in which the antenna is kept neither too large nor too small, the coupling between the antennas can be reduced as much as the conventional MIMO antenna method, .

However, in a load-modulated beam space (MIMO) system, an additional matching network between the power amplifier and the impedance loading circuit is required. This is because the impedance of the impedance loading circuit is changed, but the impedance viewed from the parasitic antenna must be maintained at 50 ohms.

Accordingly, the load-modulated beam space (MIMO) system secures the stability of the antenna stage, but increases the complexity of system implementation due to the additional matching network, and increases the difficulty and cost of implementation. have.

In addition, in the load-modulated beam space (MIMO) system, the complexity of the RF stage is increased due to the matching network as described above. That is, I have a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and it is an object of the present invention to provide a method and apparatus for selectively transmitting beam space multi stream transmission using an active antenna and beam forming function using a plurality of parasitic antennas through respective impedance loading control for active antennas and parasitic antennas The present invention is directed to a wireless transmission apparatus and a method thereof.

A wireless transmission apparatus including one or more parasitic antennas and one or more active antennas for a beam-space MIMO system to achieve the above object includes a modem circuit for outputting a signal to be transmitted through multiple stream transmission or beamforming, A control circuit for selectively applying a control signal for generating a multi-stream signal or a beamforming signal in accordance with a transmission mode of the modem circuit, and a control circuit for applying the beamforming signal according to the applied control signal And an impedance loading circuit for loading an impedance corresponding to the plurality of parasitic antennas for outputting or loading an impedance corresponding to one or more active antennas for transmitting the multiple stream signal.

Here, the modem circuit may determine the transmission mode to be a multi-stream transmission mode or a beamforming transmission mode according to the update of the channel information.

The control circuit may include a multiple-stream impedance conversion unit for generating an impedance code corresponding to the multi-stream signal received from the modem circuit and outputting the generated impedance code to the impedance loading circuit.

The control circuit generates a control signal for loading an impedance corresponding to the plurality of parasitic antennas from a signal to be transmitted by beamforming received in the modem circuit and outputs the control signal to the impedance- And a forming impedance control unit.

The impedance loading circuit controls one or more switches according to an impedance loading value for outputting a beamforming signal applied from the control circuit to load the impedance corresponding to each of the plurality of parasitic antennas And may include one or more beamforming impedance loading circuits.

The at least one switch may include a plurality of switch arrays for controlling the capacitor array according to the impedance loading value, a first switch for adjusting the reactance range of the output signal output to the parasitic antenna, And a second switch for determining the second switch.

The impedance loading circuit controls one or more variable resistors in accordance with an impedance code for outputting a multiple stream signal applied from the control circuit, and loads the load modulated impedance corresponding to the active antenna, respectively And may include one or more load modulation impedance loading circuits.

Meanwhile, a wireless transmission method using a wireless transmission apparatus including one or more parasitic antennas and one or more active antennas for a beam-space MIMO system according to an embodiment of the present invention includes transmitting a signal to be transmitted through multiple stream transmission or beamforming Selectively applying a control signal for generating a multi-stream signal or a beam-forming signal in accordance with the output signal, and generating a plurality of parasitic signals in accordance with the applied control signal in order to transmit the beam- Loading an impedance corresponding to the antenna, or loading an impedance corresponding to one or more active antennas to transmit the multiple stream signal.

Here, the step of outputting the signal may output a multi-stream transmission signal or a beam-forming transmission signal according to the update of the channel information.

The applying step may further include generating an impedance code corresponding to the multiple stream signal and applying a control signal including the generated impedance code.

The applying step may apply a control signal for loading an impedance corresponding to the plurality of parasitic antennas from the beam forming signal.

In the step of loading the impedance, the impedance corresponding to each of the plurality of parasitic antennas may be respectively loaded by controlling at least one switch according to an impedance loading value for outputting an applied beamforming signal.

The at least one switch may include a plurality of switch arrays for controlling the capacitor array according to the impedance loading value, a first switch for adjusting the reactance range of the output signal output to the parasitic antenna, And a second switch for determining the second switch.

The step of loading the impedance may load each of the load modulated impedances corresponding to the active antennas by controlling one or more variable resistors in accordance with an impedance code for outputting an applied multiple stream signal, .

According to various embodiments of the present invention as described above, since transmission of a multi-stream signal is performed with a single RF, it is advantageous in integration, cost can be reduced, and stability of an antenna stage can be ensured.

1 is a block diagram showing the configuration of a transmitting apparatus according to an embodiment of the present invention.
2 is a block diagram showing the detailed configuration of the transmitting apparatus shown in FIG.
3 is a block diagram illustrating a detailed configuration of a multiple stream impedance converter according to an embodiment of the present invention.
4 is a diagram illustrating a detailed configuration of a load-modulation impedance loading unit according to an embodiment of the present invention.
5 is a circuit diagram showing a detailed configuration of a beamforming impedance loading unit according to an embodiment of the present invention.
6 is a flowchart illustrating a transmitting method of a transmitting apparatus according to an embodiment of the present invention.

The following merely illustrates the principles of the invention. Thus, those skilled in the art will be able to devise various apparatuses which, although not explicitly described or shown herein, embody the principles of the invention and are included in the concept and scope of the invention. Furthermore, all of the conditional terms and embodiments listed herein are, in principle, only intended for the purpose of enabling understanding of the concepts of the present invention, and are not to be construed as limited to such specifically recited embodiments and conditions do.

It is also to be understood that the detailed description, as well as the principles, aspects and embodiments of the invention, as well as specific embodiments thereof, are intended to cover structural and functional equivalents thereof. It is also to be understood that such equivalents include all elements contemplated to perform the same function irrespective of currently known equivalents as well as equivalents to be developed in the future.

Thus, for example, it should be understood that the block diagrams herein represent conceptual views of exemplary circuits embodying the principles of the invention. Similarly, all flowcharts, state transition diagrams, pseudo code, and the like are representative of various processes that may be substantially represented on a computer-readable medium and executed by a computer or processor, whether or not the computer or processor is explicitly shown .

The functions of the various elements shown in the drawings, including the functional blocks shown in a processor or similar concept, may be provided by use of dedicated hardware as well as hardware capable of executing software in connection with appropriate software. When provided by a processor, the functions may be provided by a single dedicated processor, a single shared processor, or a plurality of individual processors, some of which may be shared.

Also, the explicit use of terms such as processor, control, or similar concepts should not be interpreted exclusively as hardware capable of running software, and may be used without limitation as a digital signal processor (DSP) (ROM), random access memory (RAM), and non-volatile memory. Other hardware may also be included.

In the claims hereof, the elements represented as means for performing the functions described in the detailed description include all types of software including, for example, a combination of circuit elements performing the function or firmware / microcode etc. , And is coupled with appropriate circuitry to execute the software to perform the function. It is to be understood that the invention defined by the appended claims is not to be construed as encompassing any means capable of providing such functionality, as the functions provided by the various listed means are combined and combined with the manner in which the claims require .

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, in which: There will be. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

1 is a block diagram illustrating a transmitting apparatus according to an embodiment of the present invention.

1, a transmitting apparatus 100 according to an embodiment of the present invention includes a modem circuit 110, a control circuit 120, an impedance loading circuit 130, an antenna unit 140, and a power distribution circuit 150 ).

The modem circuit 110 may output a signal to be transmitted through multi-stream transmission or beamforming. Here, a signal transmitted through multiple stream transmission or beamforming may be a complex signal. The modem circuit 110 may be implemented as an LTE modem or an LTE-A modem, but is not limited thereto.

In addition, the modem circuit 110 may determine the transmission mode of the output signal in the multi-stream transmission mode or the beam-forming transmission mode according to the update of the channel information.

The control circuit 120 selectively applies a control signal for generating a multiple stream signal or a beamforming signal to the impedance loading circuit 130 according to the transmission mode of the modem circuit 110. In a multi-stream transmission mode, a control signal for generating a multi-stream signal may be applied, and in a beam-forming transmission mode, a control signal for generating a beam-forming signal may be applied.

Also, the control circuit 120 may change the I / Q signal transmitted from the modem circuit 110 to an impedance loading value. Here, the impedance loading value may be a magnitude of an impedance necessary for transmitting a current having a specific magnitude to the antenna unit 140. [ Specifically, a method for converting an I / Q signal to an impedance loading value will be described later with reference to FIG.

The impedance loading circuit 130 may load an impedance corresponding to an active antenna or an impedance corresponding to a parasitic antenna according to a control signal applied from the control circuit 120.

Specifically, if the transmission mode of the modem circuit is a multi-stream transmission mode, the impedance loading circuit 130 may load an impedance corresponding to at least one active antenna to transmit a multi-stream signal according to channel information. Also, the impedance loading circuit 130 may load an impedance corresponding to a plurality of parasitic antennas to transmit a beamforming signal when the transmission mode of the modem circuit is a beam-forming transmission mode.

The impedance loading circuit 130 may control one or more switches to set an impedance loading value for beamforming signal output when the transmission mode of the modem circuit 110 is beamforming all. The operation of the specific impedance loading circuit 130 will be described below with reference to FIG.

The antenna unit 140 transmits a signal to the outside. The antenna unit 140 may include at least one active antenna and a plurality of parasitic antennas, and the electromagnetic field radiated through the active antenna may be coupled to the plurality of parasitic antennas through mutual coupling.

The antenna unit 140 may be implemented as a printed circuit board (PCB) such as a motherboard, an integrated circuit (IC), or a system on chip (SoC).

The power distribution circuit 150 provides power to the impedance loading circuit 130. Specifically, the power distribution circuit 150 can supply different powers to the respective impedance loading sections of the impedance loading circuit 130 based on the control signal applied from the control circuit 120. However, the power supplied to each impedance loading portion of the impedance loading circuit 130 may be the same value.

2 is a block diagram showing the detailed configuration of the transmitting apparatus shown in FIG.

2, the transmission apparatus 100 'includes a baseband modem 110, a multiple stream impedance conversion unit 121, a beamforming impedance control unit 122, a beamforming impedance loading unit 131, a load modulation impedance loading unit An antenna 141, and a power divider 150. The power divider 150 includes a plurality of antennas. 2 will not be described in detail. As shown in FIG.

When the transmission mode of the modem circuit 110 is determined to be a multiple stream transmission mode, the multiple stream impedance conversion unit 121 generates an impedance code corresponding to the multiple stream signal received by the modem circuit 110 and outputs the impedance code to the impedance loading circuit 130 ).

In this case, the impedance loading circuit 130 loads the first to nth load modulation impedance loading units 132-1, 132-2, ..., 132-n, ..., 141-n) can transmit the multiple stream signal.

When the transmission mode of the modem circuit 110 is determined to be the beam-forming transmission mode, the beam-forming impedance controller 122 outputs a control signal for loading an impedance corresponding to the parasitic antenna from the beam-forming signal received at the modem circuit 110 And output it to the impedance loading circuit 130.

In this case, the impedance loading circuit 130 loads the first to n-th beamforming impedance loading units 131-1, 131-2, ..., and 131- ..., 141-n) can transmit the beam forming signal.

3 is a block diagram illustrating a detailed configuration of a multiple stream impedance converter according to an embodiment of the present invention.

3, the multiple stream impedance conversion unit 121 may include a code generation unit 310, an interface unit 320, and a look-up table 330.

The multiple stream impedance transforming unit 121 may generate an impedance code corresponding to the multiple stream signal when the multiple stream signal is received from the modem circuit 110. [ Specifically, the code generation unit 310 generates an impedance code corresponding to the I / Q signal received from the modem circuit 110. In this case, the code generation unit 310 may separate the I and Q values from the received I / Q signals and generate an impedance code based on the I and Q values in the pre-stored lookup table 130. Thereafter, the interface unit 320 may transmit the generated impedance code to the load modulation impedance loading unit 132.

4 is a diagram illustrating a detailed configuration of a load-modulation impedance loading unit according to an embodiment of the present invention.

The load modulation impedance loading section 132 includes 90 degree hybrid couplers 411, 412 and 413 and a Wilkinson power combiner 420. The 90 degree hybrid couplers 411,

The load modulation impedance loading section 132 may change the amplitude and phase of the current flowing through the active antenna by adjusting the impedance value of the active antenna. As a result, the load modulation impedance loading unit 132 can adjust the impedance value of the active antenna so that a signal corresponding to the multiple stream signal output from the modem circuit 110 is transmitted from the active antenna.

5 is a circuit diagram showing a detailed configuration of a beamforming impedance loading unit according to an embodiment of the present invention.

The beamforming impedance loading section 131 includes a first switch 510, a second switch 520 and a plurality of switch arrays 531 and 532.

The first switch 510 can adjust the yin and yang of the reactance region of the output signal output to the parasitic antenna. Specifically, when the first switch 510 is turned on, the reactance of the output signal may have a positive value, and when the first switch 510 is turned on downward, the reactance of the output signal is negative Lt; / RTI >

Also, the second switch 520 can determine whether or not the output signal is interlocked with the inductor. Specifically, when the second switch 520 is turned on, the inductor is interlocked, and when the second switch 520 is turned off, the inductor is not interlocked.

In addition, the plurality of switch arrays 531 and 532 can control the capacitor array according to the impedance loading value.

However, the circuit shown in FIG. 5 is only an embodiment of the beamforming impedance loading unit according to the present invention, and the beamforming impedance loading unit may be implemented by various other circuits, but is not limited thereto.

6 is a flowchart illustrating a transmitting method of a transmitting apparatus according to an embodiment of the present invention.

According to the transmission method of the transmitting apparatus shown in FIG. 6, a signal to be transmitted is output in the multiple stream transmission or beamforming (S610). Here, the output signal may be determined as a multi-stream transmission signal or a beam-forming transmission signal according to the update of the channel information.

Then, in accordance with the output signal, a control signal for generating a multi-stream signal or a beam-forming signal is selectively applied (S620). Specifically, an impedance code corresponding to the multiple stream signal may be generated to apply a control signal corresponding to the multiple stream signal or a control signal for loading an impedance corresponding to a plurality of parasitic antennas from the beam forming signal.

Then, in response to the applied control signal, an impedance corresponding to the plurality of parasitic antennas is loaded to transmit the beam forming signal, or an impedance corresponding to one or more active antennas is loaded in order to transmit the multiple stream signal (S630).

As described above, according to various embodiments of the present invention, it is advantageous in integration, cost reduction, and stability of the antenna stage since transmission of a multi-stream signal is performed by a single RF.

Meanwhile, the method according to various embodiments of the present invention described above may be implemented in program code and provided to each server or devices in a state stored in various non-transitory computer readable media.

A non-transitory readable medium is a medium that stores data for a short period of time, such as a register, cache, memory, etc., but semi-permanently stores data and is readable by the apparatus. In particular, the various applications or programs described above may be stored on non-volatile readable media such as CD, DVD, hard disk, Blu-ray disk, USB, memory card, ROM,

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, but, on the contrary, It should be understood that various modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention.

100: transmitting apparatus
110: modem circuit
120: control circuit
130: Impedance loading circuit
140:
150: power distribution circuit

Claims (14)

A wireless transmission device comprising at least one parasitic antenna and at least one active antenna for a beam-space MIMO system,
A modem circuit for outputting a signal to be transmitted through multiple stream transmission or beamforming;
A control circuit for selectively applying a control signal for generating a multiple stream signal or a beamforming signal in accordance with a transmission mode of the modem circuit;
One or more beamforming impedance loading circuits for loading the impedance corresponding to the plurality of parasitic antennas to transmit the beamforming signal in accordance with the applied control signal and one or more active An impedance loading circuit having at least one load modulation impedance loading circuit for loading an impedance corresponding to the antenna; And
And a power distribution circuit that supplies power to each of the load modulation impedance loading circuits and adjusts a power supply value to each of the load modulation impedance loading circuits in accordance with the applied control signal. The method according to claim 1,
The modem circuit comprising:
And determines the transmission mode to be a multi-stream transmission mode or a beamforming transmission mode according to an update of the channel information. The method according to claim 1,
The control circuit comprising:
And a multiple stream impedance converter for generating an impedance code corresponding to the multiple stream signal received from the modem circuit and outputting the generated impedance code to the impedance loading circuit. The method according to claim 1,
The control circuit comprising:
And a beamforming impedance controller for generating a control signal for loading an impedance corresponding to the plurality of parasitic antennas from a signal to be transmitted by the beamforming received in the modem circuit and outputting the control signal to the impedance loading circuit Transmitting apparatus. The method according to claim 1,
Each of the beamforming impedance loading circuits
Wherein the control unit controls one or more switches according to an impedance loading value for beamforming signal output from the control circuit to load the corresponding impedance to each of the plurality of parasitic antennas. 6. The method of claim 5,
Wherein the at least one switch comprises:
A plurality of switch arrays for controlling the capacitor arrays according to the impedance loading values;
A first switch for adjusting the reactance region of the output signal of the parasitic antenna; And
And a second switch for determining whether or not the output signal is interlocked with an inductor. The method according to claim 1,
Each of the load modulation impedance loading circuits
Characterized in that each of the one or more variable resistors is controlled in accordance with an impedance code for outputting a multiple stream signal from the control circuit to load each of the load modulated impedances corresponding to the active antenna, Device. A wireless transmission method using a wireless transmission device including at least one parasitic antenna and at least one active antenna for a beam-space MIMO system,
Outputting a signal to be transmitted through multiple stream transmission or beamforming;
Selectively applying a control signal for generating a multi-stream signal or a beam-forming signal according to the output signal;
Loading an impedance corresponding to a plurality of parasitic antennas to transmit the beam forming signal according to the applied control signal or loading an impedance corresponding to one or more active antennas to transmit the multiple stream signal; And
Supplying power for each of the impedances corresponding to each of the active antennas, and adjusting each of the power supply values in accordance with the applied control signal. 9. The method of claim 8,
Wherein the step of outputting the signal comprises:
And outputs a multi-stream transmission signal or a beam-forming transmission signal according to an update of the channel information. 9. The method of claim 8,
Wherein the applying step comprises:
Generating an impedance code corresponding to the multiple stream signal; And
And applying a control signal including the generated impedance code. 9. The method of claim 8,
Wherein the applying step comprises:
And applying a control signal for loading an impedance corresponding to the plurality of parasitic antennas from the beam forming signal. 9. The method of claim 8,
The step of loading the impedance comprises:
And controlling one or more switches according to an impedance loading value for outputting an applied beamforming signal to load the impedance corresponding to each of the plurality of parasitic antennas. 13. The method of claim 12,
Wherein the at least one switch comprises:
A plurality of switch arrays for controlling the capacitor arrays according to the impedance loading values;
A first switch for adjusting the reactance region of the output signal of the parasitic antenna; And
And a second switch for determining whether or not the output signal is interlocked with an inductor. 9. The method of claim 8,
The step of loading the impedance comprises:
And load modulated impedances corresponding to the active antennas by respectively controlling one or more variable resistors in accordance with an impedance code for outputting an applied multiple stream signal.
KR1020160021690A 2016-02-24 2016-02-24 Transmission apparatus performing selective beamforming using multiple stream transmission circuit and transmission method thereof KR101803629B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020160021690A KR101803629B1 (en) 2016-02-24 2016-02-24 Transmission apparatus performing selective beamforming using multiple stream transmission circuit and transmission method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160021690A KR101803629B1 (en) 2016-02-24 2016-02-24 Transmission apparatus performing selective beamforming using multiple stream transmission circuit and transmission method thereof

Publications (2)

Publication Number Publication Date
KR20170099530A KR20170099530A (en) 2017-09-01
KR101803629B1 true KR101803629B1 (en) 2017-12-28

Family

ID=59923868

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020160021690A KR101803629B1 (en) 2016-02-24 2016-02-24 Transmission apparatus performing selective beamforming using multiple stream transmission circuit and transmission method thereof

Country Status (1)

Country Link
KR (1) KR101803629B1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050088358A1 (en) * 2002-07-29 2005-04-28 Toyon Research Corporation Reconfigurable parasitic control for antenna arrays and subarrays
US20090036183A1 (en) * 2007-07-31 2009-02-05 Samsung Electronics Co. Ltd. Apparatus and method for supporting multiple antenna service in a wireless communication system
US20150180428A1 (en) * 2013-12-20 2015-06-25 Telefonaktiebolaget L M Ericsson (Publ) Enhanced and Versatile N-Way Doherty Power Amplifier

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050088358A1 (en) * 2002-07-29 2005-04-28 Toyon Research Corporation Reconfigurable parasitic control for antenna arrays and subarrays
US20090036183A1 (en) * 2007-07-31 2009-02-05 Samsung Electronics Co. Ltd. Apparatus and method for supporting multiple antenna service in a wireless communication system
US20150180428A1 (en) * 2013-12-20 2015-06-25 Telefonaktiebolaget L M Ericsson (Publ) Enhanced and Versatile N-Way Doherty Power Amplifier

Also Published As

Publication number Publication date
KR20170099530A (en) 2017-09-01

Similar Documents

Publication Publication Date Title
US9287960B2 (en) Radio communication apparatus, transmitter, and radio communication method
US8912957B2 (en) Reconfigurable millimeter wave multibeam antenna array
US9621330B2 (en) Split microwave backhaul transceiver architecture with coaxial interconnect
WO2011108103A1 (en) Transmitter module and phased array antenna device
US9768991B2 (en) Multi-mode active circuit control and activation system
US20160226142A1 (en) Phase control for antenna array
US11588443B2 (en) Method and device for selectively supplying voltage to multiple amplifiers by using switching regulators
KR20190119381A (en) Electronic device and method for controlling power based on bandwidth adaptation in the electronic device
US20190326664A1 (en) Compact Combiner for Phased-Array Antenna Beamformer
WO2016084650A1 (en) Active antenna system
US20210344383A1 (en) Method and System for Controlling an Antenna Array
CN108736928B (en) Method and device for controlling beam forming
KR101803629B1 (en) Transmission apparatus performing selective beamforming using multiple stream transmission circuit and transmission method thereof
US20220311404A1 (en) Low voltage variable gain amplifier with low phase sensitivity
KR102466465B1 (en) Apparatus and method for selectively supplying voltage to a plurality of amplifiers using switching regulator
US10659021B2 (en) Vector sum circuit and phase controller using the same
US8805286B2 (en) Wireless communication device, high-frequency circuit system, and local leak reduction method
US20180007645A1 (en) Outphasing power management circuit for radio frequency (rf) beamforming
JP6269834B2 (en) Wireless transmission apparatus and wireless transmission method
KR102375697B1 (en) Method and appartus for modulating baseband signal in beam space multi-input mult-output
US20230421105A1 (en) Envelope tracking radio frequency front-end circuit
KR20240003680A (en) Modem supporting digital pre-distortion, rf module and method for operating thereof
WO2019065054A1 (en) Wireless communication device and communication control method
JP2014045332A (en) Personal digital assistance and control method therefor

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant