WO2017193393A1 - Signal processing method, apparatus and system - Google Patents

Abstract

Disclosed in embodiments of the present invention are a signal processing method, apparatus and system. The method comprises: a base station processes a first signal to be sent to a first terminal device, the processing comprising: the base station modulates the first signal to generate a first modulated symbol S₁, S₁=I₁+jQ₁, j=√-1, I₁ being a real part of the first modulated symbol S₁, and Q₁ being a imaginary part of the first modulated symbol S₁; the base station transforms the first modulated symbol S₁, so as to generate a transformed modulated symbol S'₁=I'₁+jQ'₁, and I'₁ and Q'₁ being a real part and a imaginary part of the transformed modulated symbol S'1; and the base station sends the processed first signal to the first terminal device. In this way, the complexity of implementation of a transform method of a base station is reduced, thereby improving the reliability of a terminal device for receiving downlink data.

Description

Signal processing method, device and system Technical field

The present invention relates to the field of communications technologies, and in particular, to a signal processing method, apparatus, and system.

Background technique

In the Long Term Evolution (LTE)/Long Term Evolution Advanced (LTE-A) communication system, the non-orthogonal multiplexing access (NOMA) transmission method can be used in a single The information of multiple terminal devices is transmitted on the resource unit to improve the overall transmission rate of the system. Further, the semi-orthogonal multiple access (SOMA) transmission method utilizes the Gray coding feature of the existing modulation method (or constellation), so that the terminal device can adopt a simple receiving algorithm, thereby Further improve system performance. The downlink transmission schemes including NOMA and SOMA are collectively referred to as Multi-user Superposing Transmission (MUST).

In the MUST communication, it is required to provide a method for converting a downlink transmission signal by a base station, so that a signal transmitted by a base station to a plurality of terminal devices is superimposed to satisfy a Gray coding characteristic, thereby improving reliability of receiving downlink data by the terminal device. The conversion method provided by the base station in the prior art needs to design an independent implementation module according to the modulation mode of each superimposed user, which has high complexity.

Summary of the invention

Embodiments of the present invention provide a signal processing method, apparatus, and system, which can provide a signal conversion method with low complexity to facilitate MUST transmission.

In one aspect, an embodiment of the present invention provides a signal processing method, the method comprising: a base station processing a first signal to be transmitted to a first terminal device, the processing comprising: the base station modulating the first signal Generating a first modulation symbol S ₁ , where S ₁ =I ₁ +jQ ₁ ,

I ₁ is the real part of the first modulation symbol S _1, Q ₁ of the first modulation symbol S ₁ is the imaginary unit; said first base station to the modulation symbols S ₁ is converted, to generate a converted modulation symbols S ' ₁ = I' ₁ + jQ' ₁ , where I' ₁ and Q' ₁ are the real and imaginary parts of the transformed modulation symbol S'₁; the base station transmits the processing to the first terminal device The first signal. With the solution provided in this embodiment, a signal conversion method with lower complexity can be provided, which can improve the reliability of receiving downlink data by the terminal device while saving system transmission resources.

In a possible design, the base station may also modulate a second signal to be transmitted to the second terminal device to generate a second modulation symbol S ₂ . The second terminal device and the first terminal device are a group of terminal devices that are jointly scheduled. The second modulation symbol is a complex modulation symbol S ₂ =I ₂ +jQ ₂ , where I ₂ and Q ₂ are the real and imaginary parts of the second modulation symbol S ₂ , respectively. The first base station to the modulation symbols comprises transforming _{S. 1,} the base station according to claim ₂ is converted to the second modulation symbol of the first modulation symbol S S _1.

In a possible design, the base station may modulate the first signal and the second signal by using the same modulation mode, or may use different modulation modes for the first signal and the second signal. Make modulation.

In one possible design, the first base station to the modulation symbols S ₁ transform comprises: Let the real part of the first modulation symbol S ₁ I ₁ Q ₁ and imaginary part of the transformed modulation symbol S ' the real part I of the ₁ 'and _an imaginary part Q' satisfy the relation _1: I _'1 = I ₁ or _{I' 1 = -I 1, Q} '1 = Q 1 or Q' ₁ = -Q _1.

In one possible design, the base station ₂ is converted according to the second modulation symbol of the first modulation symbol S _{S. 1,} comprising: the base station according to the second modulation mode modulation symbol S _2, using the following table The formula in the transformation transforms the first modulation symbol S ₁ :

Wherein, when the second modulation symbol S ₂ adopts the QPSK modulation mode, A=0, B=0; or, when the second modulation symbol S ₂ adopts the 16QAM modulation mode,

In a possible design, the base station transforms the first modulation symbol S ₁ according to the second modulation symbol S ₂ , including: when the second modulation symbol S ₂ adopts a QPSK modulation mode, adopting the following table The formula transforms the first modulation symbol S ₁ :

In a possible design, the base station transforms the first modulation symbol S ₁ according to the second modulation symbol S ₂ , including: when the second modulation symbol S ₂ adopts a QPSK modulation mode, adopting the following formula The first modulation symbol S ₁ is transformed:

In a possible design, the base station transforms the first modulation symbol S ₁ according to the second modulation symbol S ₂ , including: when the second modulation symbol S ₂ adopts a 16QAM modulation mode, adopting the following formula The first modulation symbol S ₁ is transformed:

In a possible design, the base station transforms the first modulation symbol S ₁ according to the second modulation symbol S ₂ , including: when the power parameter configured by the base station is α, α is a real number and 0<α< At 1 o'clock, the first modulation symbol S ₁ is transformed by the following formula:

In a possible design, the base station transforms the first modulation symbol S ₁ according to the second modulation symbol S ₂ , including: when the power parameter configured by the base station is α, α is a real number and 0<α< At 1 o'clock, the first modulation symbol S ₁ is transformed by the following formula:

In one possible design, the base station according to claim ₂ is converted to the second modulation symbol of the first modulation symbol S _{S. 1,} comprising: using the following formula for the first modulation symbol S _{transform. 1:} I _'1 = I ₁ , Q' ₁ = Q ₁ .

In a possible design, the transforming, by the base station, the first modulation symbol S ₁ includes: when there is no terminal device scheduled to be jointly scheduled with the first terminal device, using the following formula to apply the first modulation symbol S ₁ is transformed: I' ₁ = I ₁ , Q' ₁ = Q ₁ .

In one possible design, when the terminal device and the first terminal device is not present in joint scheduling, the base station does the first modulation symbol S ₁ is converted.

In a possible design, the base station may further scramble the first signal and the second signal before modulating the first signal and the second signal. After converting the first modulation symbol and the second modulation symbol, the base station may further perform layer mapping on the transformed data signal.

In one possible design, the method for the base station to modulate the first signal and the second signal includes BPSK, QPSK, 16QAM, 64QAM.

In another aspect, an embodiment of the present invention provides a base station, where the base station has a function of implementing a behavior of a base station in the foregoing method. The functions can be implemented in hardware or through hardware. Perform the appropriate software implementation. The hardware or software includes one or more modules corresponding to the functions described above.

In a possible design, the structure of the base station includes a processing unit for processing a first signal to be transmitted to the first terminal device, the processing comprising: modulating the first signal to generate a first modulation Symbol S ₁ , where S ₁ =I ₁ +jQ ₁ ,

I ₁ is the real part of the first modulation symbol S _1, Q ₁ of the first modulation symbol S ₁ is the imaginary unit; the first modulation symbol S ₁ for conversion generates a converted modulation symbols S _'1 = I' ₁ + jQ' ₁ , where I' ₁ and Q' ₁ are the real and imaginary parts of the transformed modulation symbol S'₁; further comprising a transmitting unit for transmitting to the first terminal device The first signal processed by the processing unit.

In one possible design, the structure of the base station includes a processor configured to support the base station to perform the corresponding functions of the above methods. The base station may also include a transmitter and a memory. The transmitter is configured to support communication between the base station and the terminal device, and send information or instructions involved in the foregoing method to the terminal device. The memory is for coupling with a processor that stores the necessary program instructions and data for the base station.

In another aspect, an embodiment of the present invention provides a communication system, including a terminal device, and the base station described in the foregoing aspect.

In still another aspect, an embodiment of the present invention provides a computer storage medium for storing computer software instructions for use by the base station, including a program designed to perform the above aspects.

According to the technical solution provided by the embodiment of the present invention, the base station processes the downlink data signal, including modulating the data signal, generating a modulation symbol, and then transforming the modulation symbol to generate a transform modulation symbol, thereby reducing complexity of the base station transformation method. Degree, The transmission resource of the system is effectively saved, and the reliability of receiving downlink data by the terminal device is improved.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS In the following, the embodiments of the present invention will be briefly described, and the drawings in the following description are merely exemplary embodiments of the present invention. For the skilled person, other drawings can be obtained from these drawings without any creative work.

FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present invention;

2 is a flowchart of a signal processing method according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a signal processing method according to another embodiment of the present invention; FIG.

FIG. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a base station according to another embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings. It is apparent that the described embodiments are only a part of the embodiments of the invention, and not all of them. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any inventive effort are within the scope of the present invention.

The technical solution proposed by the embodiment of the present invention is based on the communication system 100 shown in FIG. 1. The communication system 100 can perform MUST communication. The communication system 100 includes at least one base station (BS) and at least two terminal devices. Two of the terminal devices can be a group of superimposed users, one terminal device is a near user, and the other terminal device For far users. A near user is a user who needs interference cancellation at the receiving end in MUST communication. A remote user refers to a user who does not need interference cancellation at the receiving end in MUST communication. Near users and far users can be paired with each other. When the base station has the downlink data transmission requirement, the two terminal devices that are paired with each other can be scheduled to occupy the same downlink resource, and the data is sent to the two terminal devices. Near users can only pair with far users. Far users can only be paired with nearby users. Two terminal devices that are paired with each other are also referred to as superimposed users, or terminal devices that are mutually coordinated scheduling.

In the communication system 100 shown in FIG. 1, for example, two terminal devices that can be paired with each other are provided, which are the terminal device 20 and the terminal device 21, respectively. The terminal device 20 and the terminal device 21 are terminal devices that are jointly scheduled for each other. The base station 10 can simultaneously transmit the signal processed data to the terminal device 20 and the terminal device 21 by using the same downlink resource in a manner of superimposing transmission. After receiving the signal processed data, the terminal device 20 and the terminal device 21 perform corresponding processing to obtain respective data. Through the pairing of two terminal devices, the MUST communication system effectively improves the utilization efficiency of resources.

In the embodiment of the present invention, the downlink resource used by the base station 10 to transmit data may be a time-frequency resource.

It should be understood that, in the embodiment of the present invention, the communication system 100 may be, for example, a Global System of Mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, and a Wideband Code Division Multiple Access (Wideband). Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (Frequency Division Duplex, FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), and the like. In addition, the communication system 100 can also be applied to the communication technology of the future, and the technical solution provided by the embodiment of the present invention is applicable to the communication system that uses the new communication technology to support the MUST communication. The system architecture and the service scenario described in the embodiments of the present invention are for the purpose of more clearly illustrating the technical solutions of the embodiments of the present invention, and do not constitute a limitation of the technical solutions provided by the embodiments of the present invention. The technical solutions provided by the embodiments of the present invention are equally applicable to similar technical problems.

It should also be understood that, in the embodiment of the present invention, the terminal device may also be referred to as a terminal, a user equipment (User Equipment, UE), a user terminal, a user agent, a user equipment, a subscriber unit, a subscriber station, a mobile station, and a mobile station (Mobile). Station, MS), remote station, remote terminal, mobile device, mobile terminal, wireless communication device, etc., the terminal device can be connected to one or more core networks via a Radio Access Network (RAN) Communication, for example, the terminal device may be a mobile phone (or "cellular" phone), a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a personal number Personal Digital Assistant (PDA), handheld device with wireless communication function, computing device, computer with mobile terminal or other processing device connected to wireless modem, etc., for example, the terminal device can also be portable, pocket-sized, handheld Computer built-in or in-vehicle mobile devices that exchange language with wireless access networks Words and / or data.

In an embodiment of the present invention, a base station (e.g., base station 10) may include various forms of macro base stations, micro base stations (also referred to as small stations), relay stations, access points, and the like. In a system using different radio access technologies, the name of a device having a base station function may be different, for example, in an LTE system, an evolved Node B (evolved NodeB, eNB or eNodeB), in the third In a 3rd generation (3G) system, it is called a Node B or the like. For convenience of description, in all embodiments of the present invention, the above-described devices that provide wireless communication functions for terminal devices are collectively referred to as base stations.

It should be noted that the number of terminal devices included in the communication system 100 shown in FIG. 1 is merely an example, and the embodiment of the present invention is not limited thereto. For example, more terminal devices that communicate with the base station may be included, which are not described in the drawings for the sake of brevity. Further, in the communication system 100 shown in FIG. 1, although the base station 10 and a plurality of terminal devices are shown, the communication system 100 may not be limited to include the base station and the terminal device, and may further include a core network. Devices or devices for carrying virtualized network functions, etc., will be apparent to those of ordinary skill in the art and will not be described in detail herein.

Since the data signals of a pair of mutually paired terminal devices need to be transmitted on the same resource, the base station needs to process the downlink data sent to a group of terminal devices to avoid interference between signals. In the prior art, the signal processing method provided by the base station is related to the modulation mode of each terminal device, and the complexity is high.

In the solution provided by the embodiment of the present invention, the base station provides a signal conversion method with a lower complexity for the terminal device, which improves the reliability of receiving the downlink data by the terminal device while saving transmission resources.

The signal processing method provided by the embodiment of the present invention will be described in detail below with reference to FIG. 2 and FIG. For convenience of description, two terminal devices that are jointly scheduled (ie, paired with each other) may be referred to as a first terminal device and a second terminal device, respectively, and a signal to be sent to the first terminal device is referred to as a first signal, and is to be sent to the first terminal. The signal of the two terminal devices is called the second signal.

In this embodiment, the base station processes the first signal to be transmitted to the first terminal device, and the processing includes the following steps.

Step 101: The base station modulates the first signal to generate a first modulation symbol.

Optionally, as shown in FIG. 3, the base station may further scramble the first signal before modulating the first signal.

In this embodiment, the first modulation symbol is a complex modulation symbol S ₁ =I ₁ +jQ ₁ , where I ₁ is the real part of the first modulation symbol S ₁ , and Q ₁ is the first modulation symbol. The imaginary part of S ₁ ,

Optionally, the base station may further modulate a second signal to be sent to the second terminal device to generate a second modulation symbol. The second terminal device and the first terminal device are a group of terminal devices that are jointly scheduled. The base station sends the first signal and the second signal to the first terminal device and the second terminal device by using the same resource. The second modulation symbol is also a complex modulation symbol S ₂ =I ₂ +jQ ₂ , where I ₂ and Q ₂ are the real and imaginary parts of the second modulation symbol S ₂ , respectively.

Optionally, the base station may further scramble the second signal before modulating the second signal.

Optionally, the base station modulates the first signal and the second signal, and uses Modulation methods include, but are not limited to, BPSK, QPSK, 16QAM, 64QAM, and the like.

Optionally, the base station may modulate the first signal and the second signal by using the same modulation manner, or may modulate the first signal and the second signal by using different modulation modes.

Step 102, the base station of the first modulation symbol S ₁ is converted, to generate a converted modulation symbols.

In this embodiment, the transform modulation symbol is a complex modulation symbol S' ₁ = I' ₁ + jQ' ₁ , where I' ₁ and Q' ₁ are the real and imaginary parts of the transform modulation symbol S' ₁ .

In the present embodiment, the converted modulation symbols S 'is the real part I _{1' 1} and the imaginary part Q _'1 to the first modulation symbol S ₁ is the real part and the imaginary part I ₁ Q ₁ satisfies the relationship: I' ₁ = I ₁ or I' ₁ = -I ₁ , Q' ₁ = Q ₁ or Q' ₁ = -Q ₁ .

When there is a terminal device that is jointly scheduled with the first terminal device, for example, the second terminal device in this embodiment, the specific transformation manner of the first modulation symbol S ₁ by the base station is related to the second modulation symbol S ₂ . The base station may transform the first modulation symbol S ₁ by any one of the following a, b, and c.

a, the base station transforms the first modulation symbol according to a second modulation _{symbol. 1} S S ₂ of the modulation scheme.

Optionally, the base station may transform the first modulation symbol S ₁ according to a specific modulation manner of the second modulation symbol S ₂ by using a formula in the following Table 1:

Table 1

In the formula of Table 1 above, when the second modulation symbol S ₂ is in the QPSK modulation mode, A=0, B=0.

In the formula of Table 1 above, when the second modulation symbol S ₂ adopts the 16QAM modulation mode,

Optionally, when the second modulation symbol S ₂ adopts a QPSK modulation mode, the base station may transform the first modulation symbol S ₁ by using a formula in the following Table 2:

Table 2

Optionally, when the second modulation symbol S _{2 is in} a QPSK modulation mode, according to the formulas in Table 1 and Table 2 above, the specific transformation method of the first modulation symbol S ₁ by the base station is as follows:

Optionally, when the second modulation symbol S _{2 is in} a 16QAM modulation mode, according to the formula in Table 1 above, the specific transformation method of the first modulation symbol S ₁ by the base station is as follows:

b, the base station transforms the modulation symbol S ₁ of the first terminal device according to the configured power parameter α, where the power parameter α is a value pre-configured by the base station and related to the power for transmitting the first signal, and α is greater than 0 is a real number less than 1.

Optionally, the base station may adopt the following transformation method according to the second modulation symbol S ₂ and the configured power parameter α:

Optionally, the base station may also adopt the following transformation method:

c. The base station transforms the first modulation symbol S ₁ according to a preset rule.

Optionally, the base station may adopt the following transformation method:

I' ₁ =I ₁ , Q' ₁ =Q ₁ .

When the terminal device and the first terminal device does not exist joint scheduling, i.e., a base station needs only to the terminal device, the terminal device in the first example of the present embodiment, when downlink data transmission, the base station may not be the first modulation symbol S ₁ Transforming; or, the base station transforms the first modulation symbol S ₁ as follows:

I' ₁ =I ₁ , Q' ₁ =Q ₁ .

In the present embodiment, the base station may transform the modulation symbols S _'1 layer mapping, shown in Figure 3, as well as other subsequent treatment, particularly treatment not elaborate. The base station finally transmits the processed data signal to the terminal device.

After receiving the processed data signal sent by the base station, the terminal device may obtain an internal data signal by using inverse processing or an existing receiving method.

The signal processing method provided by the embodiment of the present invention can enable the base station to adopt a signal conversion method with lower complexity, which can improve the reliability of receiving downlink data of each terminal device while saving system transmission resources.

In the embodiment provided by the present invention, the signal processing method provided by the embodiment of the present invention is introduced from the perspective of each network element itself and the interaction between the network elements. It can be understood that each network element, such as a terminal device, a base station, an access network device, a core network device, etc., in order to implement the above functions, includes hardware structures and/or software modules corresponding to each function. Those skilled in the art will readily appreciate that the present invention can be implemented in a combination of hardware or hardware and computer software in combination with the elements and algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is executed by hardware or computer software to drive hardware depends on the specific application and design of the technical solution. Constraint conditions. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

FIG. 4 shows a possible structural diagram of the base station 40 involved in the above embodiment. The base station 40 can be the base station 10 as shown in FIG. The base station includes a processing unit 401 and a transmitting unit 402.

The processing unit 401 can be used to perform the signal processing methods as described in FIGS. 2 and 3. For example, the processing unit 401 modulates a first signal to be transmitted to the first terminal device, generates a first modulation symbol S ₁ =I ₁ +jQ ₁ , transforms the first modulation symbol S ₁ , and generates a transform. Modulation symbol S' ₁ = I' ₁ + jQ' ₁ .

Optionally, when there is a terminal device that is jointly scheduled with the first terminal device, for example, the second terminal device in the signal processing method described in FIG. 2 and FIG. 3, the processing unit 401 may also send the second device to be sent. The second signal of the terminal device is modulated to generate a second modulation symbol S ₂ . The processing unit 401 may transform the first modulation symbol S ₁ according to the second modulation symbol S ₂ by using any one of a, b, and c in step 102. When the terminal device and the first terminal device is not present in joint scheduling, processing unit 401 may not be the first modulation symbol S ₁ is converted, or converted using the method described in the first step 102 converts the modulation symbols S ₁ .

Optionally, the processing unit 401 is further configured to perform scrambling on the first signal, mapping the transform modulation symbol layer, and the like. The processing unit 401 can also perform various functions for communicating with a terminal device or other network device.

The transmitting unit 402 transmits the first signal processed by the processing unit 401 to the terminal device.

Through the functions of the units in the foregoing embodiments, the base station can adopt a signal conversion method with lower complexity, which improves the reliability of receiving downlink data of each terminal device while reducing the complexity of the base station equipment.

FIG. 5 shows a possible structural diagram of the base station 50 involved in the above embodiment. The base station includes a processor 501 and a receiver/transmitter 502. The functions of processing unit 401 and transmitting unit 402 in FIG. 4 may be implemented by processor 501 and receiver/transmitter 502, respectively. The receiver/transmitter 502 can be configured to support data transmission and reception between the base station and the terminal device in the foregoing embodiment. The base station may further include a memory 503, which may be used to store program codes and data of the base station. The base station may further include a communication unit 504 for supporting the base station to communicate with other network entities.

The various components of the base station are coupled together by a bus system 505, which in addition to the data bus includes a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are labeled as bus system 505 in FIG.

It will be appreciated that Figure 5 only shows a simplified design of the base station. In practical applications, the base station may include any number of transmitters, receivers, processors, controllers, memories, communication units, etc., and all base stations that can implement the present invention are within the scope of the present invention.

It can be understood that the processor in the embodiment of the present invention may be a central processing unit (CPU), a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or the like. Programming logic devices, transistor logic devices, hardware components, or any combination thereof. It can be implemented or executed in conjunction with the present disclosure. Various exemplary logical blocks, modules and circuits are described. The processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.

The steps of the method or algorithm described in the embodiments of the present invention may be directly embedded in hardware, a software module executed by a processing unit, or a combination of the two. The software modules can be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium in the art. Illustratively, the storage medium can be coupled to the processing unit such that the processing unit can read information from the storage medium and can write information to the storage medium. Alternatively, the storage medium can also be integrated into the processing unit. The processing unit and the storage medium may be configured in an ASIC, and the ASIC may be configured in the user terminal device. Alternatively, the processing unit and the storage medium may also be configured in different components in the user terminal device.

Those skilled in the art should appreciate that in the above one or more examples, the above described functions described in the embodiments of the present invention may be implemented in hardware, software, firmware, or any combination of the three. If implemented in software, the functions may be stored on a computer readable medium or transmitted on a computer readable medium in one or more instructions or code. Computer readable media includes computer storage media and communication media that facilitates transfer of a computer program from one place to another. The storage medium can be any available media that any general purpose or special computer can access. For example, such computer readable media can include, but is not limited to, RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage device, or any other device or data structure that can be used for carrying or storing Others can be read by general purpose/special computer, or general purpose/special processing unit The medium of the form of the program code. In addition, any connection can be appropriately defined as a computer readable medium, for example, if the software is from a website site, server, or other remote resource through a coaxial cable, fiber optic computer, twisted pair, digital subscriber line (DSL) Or wirelessly transmitted in, for example, infrared, wireless, and microwave, is also included in the computer readable medium as defined. The disks and discs include compact disks, laser disks, optical disks, DVDs, floppy disks, and Blu-ray disks. Disks typically replicate data magnetically, while disks typically optically replicate data with a laser. Combinations of the above may also be included in a computer readable medium.

The specific embodiments of the present invention have been described in detail with reference to the preferred embodiments of the present invention. The scope of the protection, any modifications, equivalent substitutions, improvements, etc., which are made on the basis of the technical solutions of the present invention, are included in the scope of the present invention.

Claims (23)

1. A signal processing method, comprising:

   The base station processes the first signal to be sent to the first terminal device, the processing comprising: the base station modulating the first signal to generate a first modulation symbol S ₁ , where S ₁ =I ₁ +jQ ₁ ,

   

   I ₁ is the real part of the first modulation symbol S _1, Q ₁ of the first modulation symbol S ₁ is the imaginary unit; said first base station to the modulation symbols S ₁ is converted, to generate a converted modulation symbols S ' ₁ = I' ₁ + jQ' ₁ , where I' ₁ and Q' ₁ are the real and imaginary parts of the transformed modulation symbol S'₁;

   The base station sends the first signal that passes the processing to the first terminal device.
2. The method according to claim 1, wherein the transforming, by the base station, the first modulation symbol S ₁ comprises:

   The base station transforms the first modulation symbol S ₁ according to a second modulation symbol S ₂ , where S ₂ =I ₂ +jQ ₂ , I ₂ and Q ₂ respectively represent the second modulation symbol S ₂ And the imaginary part, the second modulation symbol is that the base station modulates and generates a second signal to be sent to the second terminal device, where the first terminal device and the second terminal device are jointly scheduled terminal devices .
3. The method according to claim 1 or 2, wherein the transforming the first modulation symbol S ₁ by the base station comprises:

   Let the relationship between the real part I ₁ and the imaginary part Q _{1 of} the first modulation symbol S ₁ and the real part I′ ₁ and the imaginary part Q′ ₁ of the transformed modulation symbol S′ ₁ satisfy: I′ ₁ =I ₁ Or I' ₁ = -I ₁ , Q' ₁ = Q ₁ or Q' ₁ = -Q ₁ .
4. The method according to claim 2, wherein the base station transforms the first modulation symbol S ₁ according to the second modulation symbol S ₂ , including:

   The base station transforms the first modulation symbol S ₁ according to a modulation manner of the second modulation symbol S ₂ by using a formula in the following table:

   

   Wherein, when the second modulation symbol S ₂ adopts the QPSK modulation mode, A=0, B=0; or, when the second modulation symbol S ₂ adopts the 16QAM modulation mode,

   

   
5. The method according to claim 2, wherein the base station transforms the first modulation symbol S ₁ according to the second modulation symbol S ₂ , including:

   When the second modulation symbol S ₂ adopts the QPSK modulation mode, the first modulation symbol S ₁ is transformed by using a formula in the following table:

   
6. The method according to claim 2, wherein the base station transforms the first modulation symbol S ₁ according to the second modulation symbol S ₂ , including:

   When the second modulation symbol S ₂ adopts the QPSK modulation mode, the first modulation symbol S ₁ is transformed by the following formula:

   

   
7. The method according to claim 2, wherein the base station transforms the first modulation symbol S ₁ according to the second modulation symbol S ₂ , including:

   When the second modulation symbol S ₂ adopts the 16QAM modulation mode, the first modulation symbol S ₁ is transformed by using the following formula:

   

   
8. The method according to claim 2, wherein the base station transforms the first modulation symbol S ₁ according to the second modulation symbol S ₂ , including:

   When the power parameter configured by the base station is α, α is a real number and 0<α<1, the first modulation symbol S ₁ is transformed by the following formula:

   

   
9. The method according to claim 2, wherein the base station transforms the first modulation symbol S ₁ according to the second modulation symbol S ₂ , including:

   When the power parameter configured by the base station is α, α is a real number and 0<α<1, the first modulation symbol S ₁ is transformed by the following formula:

   

   
10. The method according to claim 2, wherein the base station transforms the first modulation symbol S ₁ according to the second modulation symbol S ₂ , including:

    The first modulation symbol S ₁ is transformed by the following formula: I' ₁ = I ₁ , Q' ₁ = Q ₁ .
11. The method according to claim 1, wherein the transforming, by the base station, the first modulation symbol S ₁ comprises:

    When there is no terminal device scheduled to be jointly scheduled with the first terminal device, the first modulation symbol S ₁ is transformed by using the following formula: I' ₁ = I ₁ , Q' ₁ = Q ₁ .
12. A base station, comprising:

    a processing unit, configured to process a first signal to be sent to the first terminal device, where the processing includes: modulating the first signal to generate a first modulation symbol S ₁ , where S ₁ =I ₁ + jQ ₁ ,

    

    I ₁ is the real part of the first modulation symbol S _1, Q ₁ of the first modulation symbol S ₁ is the imaginary unit; the first modulation symbol S ₁ for conversion generates a converted modulation symbols S _'1 = I' ₁ + jQ' ₁ , where I' ₁ and Q' ₁ are the real and imaginary parts of the transformed modulation symbol S'₁; a transmitting unit for transmitting to the first terminal device through the processing unit The first signal processed.
13. The base station according to claim 12, wherein the transforming the first modulation symbol S ₁ by the processing unit comprises:

    The processing unit transforms the first modulation symbol S ₁ according to a second modulation symbol S ₂ , wherein S ₂ =I ₂ +jQ ₂ , I ₂ and Q ₂ respectively represent the second modulation symbol S ₂ a real part and an imaginary part, wherein the second modulation symbol is that the processing unit modulates and generates a second signal to be sent to the second terminal device, where the first terminal device and the second terminal device are jointly scheduled Terminal Equipment.
14. The base station according to claim 12 or 13, wherein the transforming the first modulation symbol S ₁ by the processing unit comprises:

    Let the relationship between the real part I ₁ and the imaginary part Q _{1 of} the first modulation symbol S ₁ and the real part I′ ₁ and the imaginary part Q′ ₁ of the transformed modulation symbol S′ ₁ satisfy: I′ ₁ =I ₁ Or I' ₁ = -I ₁ , Q' ₁ = Q ₁ or Q' ₁ = -Q ₁ .
15. The base station according to claim 13, wherein the processing unit transforms the first modulation symbol S ₁ according to the second modulation symbol S ₂ , including:

    According to the modulation mode of the second modulation symbol S ₂ , the first modulation symbol S ₁ is transformed by using a formula in the following table:

    

    Wherein, when the second modulation symbol S ₂ adopts the QPSK modulation mode, A=0, B=0; or, when the second modulation symbol S ₂ adopts the 16QAM modulation mode,

    

    
16. The base station according to claim 13, wherein the processing unit transforms the first modulation symbol S ₁ according to the second modulation symbol S ₂ , including:

    When the second modulation symbol S ₂ adopts the QPSK modulation mode, the first modulation symbol S ₁ is transformed by using a formula in the following table:

    
17. The base station according to claim 13, wherein the processing unit transforms the first modulation symbol S ₁ according to the second modulation symbol S ₂ , including:

    When the second modulation symbol S ₂ adopts the QPSK modulation mode, the first modulation symbol S ₁ is transformed by using the following formula:

    

    
18. The base station according to claim 13, wherein the processing unit transforms the first modulation symbol S ₁ according to the second modulation symbol S ₂ , including:

    When the second modulation symbol S ₂ adopts the 16QAM modulation mode, the first modulation symbol S ₁ is transformed by using the following formula:

    

    
19. The base station according to claim 13, wherein the processing unit transforms the first modulation symbol S ₁ according to the second modulation symbol S ₂ , including:

    When the power parameter configured by the base station is α, α is a real number and 0<α<1, the first modulation symbol S ₁ is transformed by using the following formula:

    

    
20. The base station according to claim 13, wherein the processing unit transforms the first modulation symbol S ₁ according to the second modulation symbol S ₂ , including:

    When the power parameter configured by the base station is α, α is a real number and 0<α<1, the first modulation symbol S ₁ is transformed by using the following formula:

    

    
21. The base station according to claim 13, wherein the processing unit transforms the first modulation symbol S ₁ according to the second modulation symbol S ₂ , including:

    The first modulation symbol S ₁ is transformed by the following formula: I' ₁ = I ₁ , Q' ₁ = Q ₁ .
22. The base station according to claim 12, wherein the transforming the first modulation symbol S ₁ by the processing unit comprises:

    When there is no terminal device scheduled to be jointly scheduled with the first terminal device, the first modulation symbol S ₁ is transformed by using the following formula: I' ₁ = I ₁ , Q' ₁ = Q ₁ .
23. A communication system comprising a terminal device and a base station according to claim 12.

Images