KR102074217B1 - An Adaptive Rate Splitting Method and System for Uplink Non-Orthogonal Multiple Access Systems - Google Patents

Abstract

The present invention provides an adaptive rate splitting (ARS) method and system for an uplink non-orthogonal multiple access system. According to the present invention, the adaptive rate splitting method for an uplink non-orthogonal multiple access system comprises: a step of using, by non-orthogonal multiple accesses, an adaptive power allocation coefficient synchronized by cognitive radio to perform adaptive rate splitting, to allocate transmission power for reverse power control between two data streams of a first user or a second user; a step of using the two data streams to obtain a signal overlapped with a power domain, and obtaining transmission power for reverse power control to guarantee a power level of an arrival signal of a base station required for successive interference cancellation (SIC) processing; and a step of applying successive interference cancellation to restore the arrival signal of the base station.

Description

An adaptive rate splitting method and system for uplink non-orthogonal multiple access systems

The present invention relates to an adaptive rate division method and system for an uplink non-orthogonal multiple access system.

Non-Orthogonal Multiple Access (NOMA), which can provide large-scale, spectral-efficient connections, has been considered a fifth generation (5G) network and multiple access paradigm shift. The same orthogonal resource blocks along time, frequency and / or code axis in a power domain non-orthogonal multiple access (NOMA) system with the aid of power domain overlap coding and successive interference cancellation (SIC). In plural users are serviced. With regard to the ability to deliver different types of service messages to different users, the rate splitting (RS) technique has received much attention recently. In particular, the rate division transmitter splits the personal information into a common message and a private message so that all receivers can decode the common message. For uplink non-orthogonal multiple access systems, rate division is difficult to implement because of the complex power allocation for both power domain overlap coding and rate division. In addition, due to the complex system configuration, it is difficult to analyze the speed division performance of the uplink non-orthogonal multiple access system.

Korean Unexamined Patent Publication No. 10-2016-0005273 (2016.01.15.)

The technical problem to be achieved by the present invention is an uplink non-orthogonal multiple access system in which a user far from the near user communicates with a base station (BS) using power domain non-orthogonal multiple access (NOMA). To provide an adaptive rate splitting (ARS) method and system. An adaptive rate division scheme for uplink non-orthogonal multiple access systems according to reverse power control is used to reduce power failure probability by performing power allocation between divided data streams.

In one aspect, the adaptive rate division method for the uplink non-orthogonal multiple access system proposed by the present invention provides a method for allocating transmission power for reverse power control between data streams of a first user or a second user. Orthogonal Multiple Access performs adaptive rate splitting (ARS) using adaptive power allocation coefficients synchronized by cognitive radio, and superimposes on the power domain using the two data streams. Obtaining the received signal, obtaining transmit power for reverse power control to ensure the power level of the arrival signal of the base station required for continuous interference cancellation (SIC) processing, and continuing to recover the arrival signal of the base station. Applying an interference cancellation.

Non-orthogonal multiple access performs adaptive rate division using adaptive power allocation coefficients synchronized by cognitive radios to allocate transmission power for reverse power control between the data streams of the first user or the second user. The processing of the source information modulates the information signal, and the information signal for the first user or the second user is divided into two data streams corresponding to the first virtual user and the second virtual user, respectively.

Obtaining a signal superimposed on the power domain using the two data streams, and obtaining the transmission power for the reverse power control to ensure the power level of the arrival signal of the base station required for the continuous interference cancellation processing, the first user or first The detection command at the base station is classified in consideration of the information signal of the second user, the first virtual user corresponding to the two data streams divided for the information signal of the first user or the second user, and the second virtual user.

Applying the continuous interference cancellation to recover the arrival signal of the base station comprises two pieces of data divided for the information signal of the first user or the second user, the information signal of the first user or the second user that is the arrival signal of the base station Apply continuous interference cancellation to recover the stream, and apply the information signal of the first or second user, and the information signal and the two data streams in order of detection performance to detect two data streams. A requirement is obtained to obtain a value that satisfies the requirement, and an adaptive power allocation coefficient that satisfies both the information signal and each requirement for the two data streams is obtained.

In another aspect, the adaptive rate division system for an uplink non-orthogonal multiple access system proposed by the present invention allocates transmission power for reverse power control between data streams of a first user or a second user. Non-orthogonal multiple access performs adaptive rate splitting (ARS) using adaptive power allocation coefficients synchronized by cognitive radio and uses the two data streams to power domains. Adaptive rate division transmitter and base station arrival for obtaining superimposed signals and obtaining transmit power for reverse power control to ensure the power level of the arrival signal of the base station required for successive interference cancellation (SIC) processing It includes the SIC processing section of the base station that applies continuous interference cancellation to recover the signal. All.

The adaptive speed division transmitter processes the source information to modulate the information signal, and the information signal for the first user or the second user is divided into two data streams corresponding to the first virtual user and the second virtual user, respectively. A detection command at the base station in consideration of the information signal of the first user or the second user, the first virtual user corresponding to two data streams divided for the information signal of the first user or the second user, and the second virtual user Classify

The SIC processing unit of the base station applies successive interference cancellation to recover two divided data streams for the information signal of the first user or the second user, the information signal of the first user or the second user, which is the arrival signal of the base station. A value that satisfies the requirements by obtaining requirements for the information signal and the two data streams in order of good detection performance to detect the information signal of the first user or the second user and the two data streams. And an adaptive power allocation coefficient that satisfies both the information signal and respective requirements for the two data streams.

According to embodiments of the present invention, in consideration of reverse power control, an information signal of one user is divided into two data streams for uplink transmission, while an information signal of another user is transmitted without speed division. Dynamic power allocation coefficients synchronized by the cognitive radio principle are designed for adaptive rate division techniques based on instantaneous channel state information. At the base station receiver, continuous interference cancellation is applied to recover all data streams. The developed adaptive rate segmentation technique is shown to achieve excellent power failure performance compared to the conventional uplink non-orthogonal multiple access transmission scheme. The adaptive rate division scheme for the uplink non-orthogonal multiple access system according to the reverse power control may be optimized to reduce the power failure probability by performing power allocation among the divided data streams.

1 is a schematic diagram illustrating an uplink NOMA system according to an embodiment of the present invention.
2 is a flowchart illustrating an adaptive rate division method for an uplink non-orthogonal multiple access system according to an embodiment of the present invention.
3 is a diagram illustrating an operation process of an adaptive rate division transmitter according to an embodiment of the present invention.
4 is a diagram illustrating an operation process of an SIC processing unit of a base station according to an embodiment of the present invention.
5 is a diagram illustrating a configuration of an adaptive speed division system for an uplink non-orthogonal multiple access system according to an embodiment of the present invention.
6 is a graph illustrating a probability of power failure compared to a target arrival SNR according to an embodiment of the present invention.
7 is a graph showing a target velocity against an outage probability according to an embodiment of the present invention.
8 is a graph illustrating a target velocity splitting factor for an outage probability according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic diagram illustrating an uplink NOMA system according to an embodiment of the present invention.

In the present invention, an uplink non-orthogonal multiple access (NOMA) system including a base station (BS), a first user (U ₁ ), and a second user (U ₂ ) is considered. Without loss of generality, assume that first user U ₁ and second user U ₂ are a near user and a far user, respectively. The channel from U _i (i = 1 or 2) to the base station is _denoted by h _i (i = 1 or 2). The path loss component L _i (i = 1 or 2) is also associated with h _i to indicate large scale fading. The information signal of U _i is represented by x _i (i = 1 or 2), which follows a distribution with mean of zero and unit variance.

In this invention, Rate Splitting (RS) can be realized for either near or far users. In consideration of reverse power control, an adaptive power allocation factor is used to allocate transmit power between two data streams of a near user or a remote user. The block structure of the user transmitter when applying rate division to the user is shown in FIG. 3. In FIG. 2, only the adaptive speed division technique to which the speed division is applied to the proximity user is presented. Adaptive speed splitting, where speed splitting is applied to remote users, is similar to the speed splitting technique applied to proximity users.

2 is a flowchart illustrating an adaptive rate division method for an uplink non-orthogonal multiple access system according to an embodiment of the present invention.

Non-orthogonal multiple access is adaptive using adaptive power allocation coefficients synchronized by cognitive radio to allocate transmit power for reverse power control between the data streams of the first user or the second user. Performing an ARS (Aixed Rate Splitting) operation, obtaining signals superimposed on a power domain using the two data streams, and arriving at a base station required for continuous interference cancellation (SIC) processing Obtaining 220 transmit power for reverse power control to ensure the power level of the signal and applying 230 continuous cancellation of interference to recover the arrival signal of the base station.

In step 210, the non-orthogonal multiple access is adaptive power allocation synchronized by cognitive radio to allocate transmit power for reverse power control between the data streams of the first user or the second user. Perform coefficient adaptive division using coefficients. At this time, the source information is processed to modulate the information signal, and the information signal for the first user or the second user is divided into two data streams corresponding to the first virtual user and the second virtual user, respectively.

In step 220, the two data streams are used to obtain a signal superimposed on a power domain, and reverse power control to ensure the power level of the arrival signal of the base station required for successive interference cancellation (SIC) processing. Find the transmit power for.

A detection command at the base station in consideration of the information signal of the first user or the second user, the first virtual user corresponding to two data streams divided for the information signal of the first user or the second user, and the second virtual user Classify

3 is a diagram illustrating an operation process of an adaptive rate division transmitter according to an embodiment of the present invention.

As described above, the present invention considers an uplink non-orthogonal multiple access (NOMA) system consisting of a base station, a first user U ₁ and a second user U ₂ . Without loss of generality, assume that first user U ₁ and second user U ₂ are a near user and a far user, respectively. First, the source information is processed 310 to modulate the information signal 320, and the information signal for the first user U ₁ or the second user U ₂ is transmitted to the first virtual user and the second virtual user, respectively. It is divided into two corresponding data streams. Here, only the adaptive speed division technique to which the speed division is applied to the proximity user is presented. Adaptive speed splitting, where speed splitting is applied to remote users, is similar to the speed splitting technique applied to proximity users.

로 생성되며, 여기서 P₁은 U₁의 전송 전력이다. 따라서 기지국에서 수신된 신호는 다음과 같이 쓸 수 있다.In the case of a proximity user, its information signal x ₁ is divided 330 into data streams x ₁₁ and x ₁₂ , respectively, corresponding to two virtual users U ₁₁ and U ₁₂ , respectively. Thereafter, the signal 330 superimposed on the power domain

Where P ₁ is the transmit power of U ₁ . Therefore, the signal received at the base station can be written as follows.

수학식(1)

Equation (1)

과

는 전력 할당 계수이다. here

and

Is the power allocation factor.

The adaptive power allocation coefficient synchronized by this adaptive rate division and cognitive radio principle for overlapping 330 in the power domain is then adaptive rate division using the instantaneous channel state information 331 obtained. Is designed through technology.

In order to ensure various power levels of the arrival signal required for successive interference cancellation (SIC), the reverse power control, i.e., the transmit power of U _i is given as follows.

수학식(2)

Equation (2)

는 기지국에서 수신된 신호의 목표 도달 전력이고

는 전력 스텝 레벨(

≥0dB)이다. 이후, 주파수 상향 변환 및 RF 프로세싱(340)을 거쳐 전송 안테나(341)를 통해 기지국으로 전송된다. here

Is the target arrival power of the signal received at the base station

Is the power step level (

≥0 dB). Thereafter, the signal is transmitted to the base station through the transmission antenna 341 through frequency up-conversion and RF processing 340.

Referring back to FIG. 2, in step 230, successive interference cancellation is applied to recover the arrival signal of the base station. Successive interference cancellation is applied to recover two divided data streams for the information signal of the first user or the second user, the information signal of the first user or the second user, which is the arrival signal of the base station. In order to detect the information signal of the first user or the second user and the two data streams, the requirements for the information signal and the two data streams are obtained in order of good detection performance, and a value satisfying the requirements is obtained. Obtain Then, an adaptive power allocation coefficient is obtained that satisfies both the information signal and the respective requirements for the two data streams.

4 is a diagram illustrating an operation process of an SIC processing unit of a base station according to an embodiment of the present invention.

Taking into account three users U ₁₁ , U _{12, and} U ₂ , the detection commands at the base station can be classified into various types. Continuous interference cancellation (SIC) is applied to recover desired signals x ₁₁ , x ₁₂ , and x ₂ using the arrival signal of the base station received through the receiving antenna 411. In the present invention, only one kind of detection order, that is, x ₁₁ → x ₂ → x ₁₂ , which has the best detection performance compared to other detection orders, is considered. A continuous interference cancellation process is shown in FIG. 4.

Through the RF and frequency down-conversion 410, x ₁₁ is predicted 421 through detection and demodulation 420 for x ₁₁ . Based on Equation (1), the x ₁₁ detection SINR can be derived as follows.

수학식(3)

Equation (3)

이고

을 만족하는

이다. here

ego

To satisfy

to be.

Thereafter, x ₂ is predicted 431 through detection and demodulation 430 of x ₂ .

After recovering x ₁₁ and subtracting the corresponding reconstruction signal from Equation (1), the remaining signals for detecting x ₂ can be generated as follows.

수학식(4)

Equation (4)

Thereafter, the predicted 441 x ₁₂ via the detection and demodulation unit 440 for the x _12.

Thus, the received SINR for x ₂ detection can be derived as follows.

수학식(5)

Equation (5)

The remaining signal for detecting x ₁₂ with the aid of continuous interference cancellation processing is given by

수학식(6)

Equation (6)

The received SNR for x ₁₂ detection can be derived as follows.

수학식(7)

Equation (7)

과

로 표시된다. x₁과 x₂의 성공적인 탐지에 필요한 SNR 임계값은 각각

과

로 표현할 수 있다. 분할 데이터 스트림 x₁₁과 x₁₂의 경우, 분할 목표 속도는

와

로 설정되며, 여기서

는 목표 속도 분할 계수가 된다. 기지국에서 연속적인 간섭 취소 처리 후 얻은 x₁₁과 x₁₂추정치는 x₁를 복구하는 데 사용한다. The target baud rates for U ₁ and U ₂ are

and

Is displayed. The SNR thresholds required for successful detection of x ₁ and x ₂ are

and

Can be expressed as For split data streams x ₁₁ and x ₁₂ , the split target rate is

Wow

Is set to, where

Becomes the target speed division factor. The x ₁₁ and x ₁₂ estimates obtained after successive interference cancellation processing at the base station are used to recover x ₁ .

및

로 표시할 수 있다.Then, the SNRs needed for successful detection of x ₁₁ and x ₁₂ are respectively

And

Can be displayed as

Inspired by the fact that NOMA can be treated as a special case of a cognitive radio system, the power allocation factor of the adaptive speed division technique is determined as follows. If the detection order x ₁₁ → x ₂ → x ₁₂ is applied to the base station for continuous interference cancellation processing, then U _11, U ₂ and U ₁₂ are treated as primary, secondary and tertiary users, respectively. Clearly, a detection failure for x ₁₂ or x ₂ results in false detection for x ₁₂ , which results in a power outage of x ₁ for U ₁ . In addition, in the adaptive speed division technique, the power allocation coefficients are sequentially designed to satisfy the quality of service (QoS) requirements of U ₁₁ , U ₂ , and U ₁₂ .

은 다음과 같이 쓰여진다.QoS requirements for successful x ₁₁ detection

Is written as:

수학식(8)

Equation (8)

here

수학식(9)

Equation (9)

을 만족하는

의 최소값이고 제약조건

를 적용하여

로 제한한다. 성공적인 x₂탐지를 위해 QoS 요구조건

는 다음과 같이 쓰여진다.Is

To satisfy

Is the minimum value of and constraint

By applying

Limited to QoS requirements for successful x ₂ detection

Is written as:

수학식(10)

Equation (10)

here

수학식(11)

Equation (11)

를 만족하는

의 최소값이고 제약조건

를 적용하여

로 제한한다. 그런 다음

과

모두를 만족하는 전력 할당 계수는 Is

To satisfy

Is the minimum value of and constraint

By applying

Limited to after that

and

The power allocation factor that satisfies all

수학식(12)

Equation (12)

Are constrained by

이 증가함에 따라

가 단조롭게 감소한다는 점을 고려하여 가능한 큰 확률

를 달성하려면, 수학식(12) 외에 전력 할당 계수를 최소화해야 한다. 따라서 적응적 속도 분할 기술의 전력 할당 계수는 다음과 같다.in response to detection of x ₁₂ ,

As it increases

Large probability, considering that monotonically decreases

In order to achieve, in addition to Eq. (12), the power allocation coefficient should be minimized. Therefore, the power allocation coefficient of the adaptive speed division technique is as follows.

수학식(13)

Equation (13)

5 is a diagram illustrating a configuration of an adaptive speed division system for an uplink non-orthogonal multiple access system according to an embodiment of the present invention.

The adaptive speed division method and system 500 according to the present embodiment may include a processor 510, a bus 520, a network interface 530, a memory 540, and a database 550. The memory 540 may include an operating system 541 and an adaptive speed division routine 542. The processor 510 may include an adaptive rate division transmitter 511 and an SIC processor 560 of the base station. In other embodiments the adaptive speed division method and system 500 may include more components than the components of FIG. 5. However, there is no need to clearly show most prior art components. For example, the adaptive rate division method and system 500 may include other components, such as a display or a transceiver.

The memory 540 is a computer-readable recording medium, and may include a permanent mass storage device such as random access memory (RAM), read only memory (ROM), and a disk drive. In addition, the memory 540 may store program codes for the operating system 541 and the adaptive speed division routine 542. These software components may be loaded from a computer readable recording medium separate from the memory 540 using a drive mechanism (not shown). Such a separate computer-readable recording medium may include a computer-readable recording medium (not shown), such as a floppy drive, disk, tape, DVD / CD-ROM drive, memory card, and the like. In other embodiments, software components may be loaded into the memory 540 via the network interface 530 rather than a computer readable recording medium.

The bus 520 may enable communication and data transfer between the components of the adaptive rate division method and system 500. The bus 520 may be configured using a high-speed serial bus, a parallel bus, a storage area network (SAN) and / or other suitable communication technology.

The network interface 530 may be a computer hardware component for connecting the adaptive speed division method and system 500 to a computer network. The network interface 530 may connect the adaptive rate segmentation method and system 500 to a computer network via a wireless or wired connection.

The database 550 may serve to store and maintain all information necessary for adaptive rate division. Store the extended global product classification system as master data. Although FIG. 5 illustrates that the database 550 is built and included inside the adaptive speed division method and system 500, the present invention is not limited thereto and may be omitted depending on a system implementation method or environment, or all or a part of it. It is also possible for the database of to exist as an external database built on a separate, different system.

The processor 510 may be configured to process instructions of a computer program by performing basic arithmetic, logic, and adaptive rate division methods and input / output operations of the system 500. The instructions may be provided to the processor 510 by the memory 540 or the network interface 530 and via the bus 520. The processor 510 may be configured to execute program codes for the adaptive rate division transmitter 511 and the SIC processing unit 560 of the base station. Such program code may be stored in a recording device such as memory 540.

The adaptive rate division transmitter 511 and the SIC processor 560 of the base station may be configured to perform the steps 210 to 230 of FIG. 2.

The adaptive rate division method and system 500 may include an adaptive rate division transmitter 511 and an SIC processing unit 560 of the base station.

The adaptive rate division transmitter 511 is configured to allocate transmission power for reverse power control between the data streams of the first user or the second user, so that the non-orthogonal multiple access is synchronized by cognitive radio. Adaptive Rate Splitting (ARS) is performed using the adaptive power allocation coefficient. A detection command at the base station in consideration of the information signal of the first user or the second user, the first virtual user corresponding to two data streams divided for the information signal of the first user or the second user, and the second virtual user Classify

The adaptive rate division transmitter 511 obtains a signal superimposed on a power domain using the two data streams, and guarantees a power level of an arrival signal of a base station required for continuous interference cancellation (SIC) processing. To determine the transmission power for the reverse power control. A detection command at the base station in consideration of the information signal of the first user or the second user, the first virtual user corresponding to two data streams divided for the information signal of the first user or the second user, and the second virtual user Classify

The SIC processing unit 560 of the base station applies continuous interference cancellation to recover the arrival signal of the base station. Successive interference cancellation is applied to recover two divided data streams for the information signal of the first user or the second user, the information signal of the first user or the second user, which is the arrival signal of the base station. In order to detect the information signal of the first user or the second user and the two data streams, the requirements for the information signal and the two data streams are obtained in order of good detection performance, and a value satisfying the requirements is obtained. Obtain Then, an adaptive power allocation coefficient is obtained that satisfies both the information signal and the respective requirements for the two data streams.

6 is a graph illustrating a probability of power failure compared to a target arrival SNR according to an embodiment of the present invention.

로 정의한다.Simulation results for verifying the excellent electrostatic performance achieved by the adaptive speed division technique proposed by the present invention are presented. The simulation only considers the adaptive speed division in which the speed division at U ₁ is realized. Here, the result when velocity division is realized in U ₂ is ignored. Assume that the distances from the base station to the near and far users are 50 meters and 100 meters, respectively, and the large scale fading L ₁ is set up like the reverse power control in the prior art. Also the target arrival SNR is

Defined as

bps/Hz,

bps/Hz,

dB,

,

로 설정했다. 도 6의 결과는 적응적 속도 분할 기술이

가 증가함에 따라 각각에 대한 정전 확률을 감소시킨다는 것을 보여준다. 적응적 속도 분할 기술은 속도 분할(도 6에서 "NOMA"로 표시됨)를 채택하지 않고 역방향 저전력 제어 지원 NOMA보다 낮거나 중간 SNR 영역에서 더 높은 U₁의 정전 확률을 달성하지만, 제안된 적응적 속도 분할 기술은 높은 SNR 영역에서 더 작은 정전 확률을 달성한다. U₂의 경우, 적응적 속도 분할 기술은 전체 SNR 영역에서 "NOMA"의 확률보다 더 작은 정전 확률을 달성한다.The probability of outage compared to the target arrival SNR is shown in FIG. 6.

bps / Hz,

bps / Hz,

dB,

,

Was set to. The result of Figure 6 shows that the adaptive speed division technique

As is increased, the probability of blackout for each decreases. The adaptive rate division technique does not adopt rate division (indicated as "NOMA" in Figure 6) and achieves higher U ₁ power failure probability in the lower or intermediate SNR region than the reverse low power control supported NOMA, but the proposed adaptive rate Segmentation techniques achieve smaller outage probabilities in the high SNR region. In the case of U ₂ , the adaptive rate division technique achieves an outage probability that is less than the probability of “NOMA” in the entire SNR region.

7 is a graph showing a target velocity against an outage probability according to an embodiment of the present invention.

dB,

,

dB 및 적응

bps/Hz라 설정하고 정전 확률에 대한 표적 속도의 영향을 조사한다. 그림 5에서 볼 수 있듯이 적응적 속도 분할 기술은 전체

영역에서 "NOMA"보다 더 작은 정전 확률을 달성한다.

이 증가함에 따라, 적응적 속도 분할 기술에 의해 달성된 정전 확률은 각각 U₁, U₂에 대해서도 증가한다. 반대로, "NOMA"에 의해 달성되는 정전 확률은

이 증가함에 따라 거의 동일하게 유지된다.

dB,

,

dB and adaptive

Set bps / Hz and investigate the effect of target speed on power failure probability. As shown in Figure 5, the adaptive speed splitting technique

Achieve smaller outage probabilities than "NOMA" in the region.

As this increases, the outage probability achieved by the adaptive speed division technique increases for U ₁ and U ₂ , respectively. Conversely, the probability of power outages achieved by "NOMA"

As it increases, it remains almost the same.

8 is a graph illustrating a target velocity splitting factor for an outage probability according to an embodiment of the present invention.

dB,

bps/Hz,

bps/Hz,

dB,

로 설정하고 정전 확률에 대한 목표 속도 분할 계수

의 영향을 도 8에 나타냈다.

dB,

bps / Hz,

bps / Hz,

dB,

Target speed split factor for power failure probability

Is shown in FIG. 8.

영역에서 각각 U₁ 과 U₂에 대해 가장 작은 정전 확률을 달성한다는 것을 보여준다.

가 증가함에 따라, 적응적 속도 분할 기술에 의해 달성되는 U₁ 과 U₂의 정전 확률은 증가한다.The result of FIG. 8 is a whole considering the adaptive speed division technique.

We show that we achieve the least outage probability for U ₁ and U ₂ , respectively, in the region.

As is increased, the probability of the blackout of U ₁ and U ₂ achieved by the adaptive speed division technique increases.

The present invention proposes an adaptive speed division technique for an uplink NOMA system under reverse power control. When both users communicate with the base station, through speed division to one user, the base station applies successive interference cancellation to recover the desired signal. The power allocation of adaptive rate division technology is implemented in a cognitive manner to ensure continuous interference cancellation detection performance. Adaptive speed splitting technology has been shown to achieve superior electrostatic performance compared to conventional uplink NOMA technology.

The apparatus described above may be implemented as a hardware component, a software component, and / or a combination of hardware components and software components. For example, the devices and components described in the embodiments may include, for example, processors, controllers, arithmetic logic units (ALUs), digital signal processors, microcomputers, field programmable arrays (FPAs), It may be implemented using one or more general purpose or special purpose computers, such as a programmable logic unit (PLU), microprocessor, or any other device capable of executing and responding to instructions. The processing device may execute an operating system (OS) and one or more software applications running on the operating system. The processing device may also access, store, manipulate, process, and generate data in response to the execution of the software. For convenience of explanation, one processing device may be described as being used, but one of ordinary skill in the art will appreciate that the processing device includes a plurality of processing elements and / or a plurality of types of processing elements. It can be seen that it may include. For example, the processing device may include a plurality of processors or one processor and one controller. In addition, other processing configurations are possible, such as parallel processors.

The software may include a computer program, code, instructions, or a combination of one or more of the above, and may configure the processing device to operate as desired, or process independently or collectively. You can command the device. Software and / or data may be any type of machine, component, physical device, virtual equipment, computer storage medium or device in order to be interpreted by or to provide instructions or data to the processing device. It can be embodied in. The software may be distributed over networked computer systems so that they may be stored or executed in a distributed manner. The software and data may be stored on one or more computer readable recording media.

The method according to the embodiment may be embodied in the form of program instructions that can be executed by various computer means and recorded in a computer readable medium. The computer readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the media may be those specially designed and constructed for the purposes of the embodiments, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like.

Although the embodiments have been described by the limited embodiments and the drawings as described above, various modifications and variations are possible to those skilled in the art from the above description. For example, the described techniques may be performed in a different order than the described method, and / or components of the described systems, structures, devices, circuits, etc. may be combined or combined in a different form than the described method, or other components. Or, even if replaced or substituted by equivalents, an appropriate result can be achieved.

Therefore, other implementations, other embodiments, and equivalents to the claims are within the scope of the claims that follow.

Claims (7)

Non-orthogonal multiple access is adapted using adaptive power allocation coefficients synchronized by cognitive radio to allocate transmit power for reverse power control between two data streams of a first user or a second user. Performing Axed Rate Splitting (ARS);
The two data streams are used to obtain a signal superimposed on a power domain, and transmit power for reverse power control to ensure the power level of the arrival signal of the base station required for continuous interference cancellation (SIC) processing. Obtaining; And
Applying successive interference cancellation to recover the arrival signal of the base station
Adaptive speed division method comprising a. The method of claim 1,
To allocate transmit power for reverse power control between two data streams of a first user or a second user, non-orthogonal multiple access performs adaptive rate division using adaptive power allocation coefficients synchronized by cognitive radio. The steps to perform are
The source signal is processed to modulate the information signal, and the information signal for the first user or the second user is divided into two data streams corresponding to the first virtual user and the second virtual user, respectively.
Adaptive Speed Segmentation Method. The method of claim 1,
Obtaining a signal superimposed on the power domain by using the two data streams, and obtaining the transmission power for the reverse power control to ensure the power level of the arrival signal of the base station required for the continuous interference cancellation processing,
A detection command at the base station in consideration of the information signal of the first user or the second user, the first virtual user corresponding to the two data streams divided for the information signal of the first user or the second user, and the second virtual user To classify
Adaptive Speed Segmentation Method. The method of claim 1,
Applying continuous interference cancellation to recover the arrival signal of the base station,
Apply continuous interference cancellation to recover two divided data streams for the information signal of the first user or the second user, the information signal of the first user or the second user, which is the arrival signal of the base station,
In order to detect the information signal of the first user or the second user and the two data streams, the requirements for the information signal and the two data streams are obtained in order of good detection performance, and a value satisfying the requirements is obtained. Finding,
Obtaining an adaptive power allocation coefficient that satisfies both the information signal and respective requirements for the two data streams
Adaptive Speed Segmentation Method. Non-orthogonal multiple access is adapted using adaptive power allocation coefficients synchronized by cognitive radio to allocate transmit power for reverse power control between two data streams of a first user or a second user. Perform an ARS (Aixed Rate Splitting), obtain a signal superimposed on the power domain using the two data streams, and determine the arrival signal of the base station required for continuous interference cancellation (SIC) processing. An adaptive rate division transmitter for obtaining transmit power for reverse power control to ensure a power level; And
SIC processing section of the base station applying continuous interference cancellation to recover the arrival signal of the base station
Adaptive speed splitting system comprising a. The method of claim 5,
The adaptive speed division transmitter is
Processing the source information to modulate the information signal, and the information signal for the first user or the second user is divided into two data streams corresponding to the first virtual user and the second virtual user, respectively,
A detection command at the base station in consideration of the information signal of the first user or the second user, the first virtual user corresponding to the two data streams divided for the information signal of the first user or the second user, and the second virtual user To classify
Adaptive speed splitting system. The method of claim 5,
SIC processing unit of the base station,
Apply continuous interference cancellation to recover two divided data streams for the information signal of the first user or the second user, the information signal of the first user or the second user, which is the arrival signal of the base station,
In order to detect the information signal of the first user or the second user and the two data streams, the requirements for the information signal and the two data streams are obtained in order of good detection performance, and a value satisfying the requirements is obtained. Finding,
Obtaining an adaptive power allocation coefficient that satisfies both the information signal and respective requirements for the two data streams
Adaptive speed splitting system.

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