WO2015168939A1

WO2015168939A1 - Method and device for controlling peak-to-average power ratio and base band unit

Info

Publication number: WO2015168939A1
Application number: PCT/CN2014/077158
Authority: WO
Inventors: 王新征
Original assignee: 华为技术有限公司
Priority date: 2014-05-09
Filing date: 2014-05-09
Publication date: 2015-11-12
Also published as: CN105409180A; CN105409180B

Abstract

Provided are a method and device for controlling the peak-to-average power ratio, the method comprising: determining N pilot frequency domains aligned at a first moment in M dedicated physical channels of a cell; acquiring a pilot frequency symbol corresponding to each pilot frequency domain from the N pilot frequency domains, and generating a virtual pilot frequency symbol corresponding to each of the respective pilot frequency symbols; performing spread spectrum and scrambling processing on each of the generated virtual pilot frequency symbols so as to generate a virtual chip respectively corresponding to each virtual pilot frequency symbol; and superimposing actual chips corresponding to the first moment and the generated virtual chips. By means of this method, virtual chips generated according to virtual pilot frequency symbols and orthogonal to actual chips can be superimposed in a base band signal, so as to effectively reduce the PAPR in the base band signal, further reduce the calculation pressure of reducing the PAPR in intermediate radio frequency, provide an effective protection for a power amplifier, and improve the security and stability of the whole UMTS.

Description

Method, device and baseband unit for controlling peak average power ratio

The present invention relates to the field of communications technologies, and in particular, to a method, a device, and a baseband unit for controlling a peak average power ratio. Background technique

Currently, the general mobile communication system (English: Universal Mobile Telecommunications System, UMTS for short) transmits the signal of the public channel of the local area and all the activated version 99 of the cell (English: Release 99, referred to as R99). Signal of the physical channel (English: Dedicated Physical Channel, DPCH for short). Each user's DPCH has a chip offset (English: chipoffset) parameter. The chipoffset parameter characterizes the start of a frame in the DPCH. The value of the chipoffset parameter can be expressed as 256N (N is an integer, and 0<N<149). The chipoffset parameters of multiple DPCHs are aligned. The chipoffset parameter alignment is defined as the chipoffset of multiple DPCHs being equal or the remainder after chipoffset divided by 2560 is equal.

When the chipoffset parameters are aligned, the downlink channel slot diagram of the Node B under UMTS is as shown in Figure 1. At this time, the pilot domains of all DPCHs are aligned in time, and all pilot symbols are known in advance, although different users use them. Different spreading codes, but the first chip of the spreading code is always +1, so the pilot symbols of all DPCH pilot fields (English: Pilot Symbol) must be added in phase, which will result in higher Peak-to-Average Power Ratio (PAPR).

When the chipoffset parameters of multiple DPCHs are aligned, the PAPR of the signal is greatly improved. The higher the PAPR, the lower the efficiency of the power amplifier. The power consumption, volume and cost of the amplifier are the bottlenecks of UMTS.

In order to avoid excessive PAPR in UMTS, the UMTS base station side should try to avoid chipoffset alignment. However, the downlink traffic of the community is getting larger and larger, and the number of DPCHs is increasing, but the available chipoffset parameters are limited. In addition, the time division multiplexing (English: Time Division Multiplexing, TDM) scheduling application requires the chipoffset parameter of the downlink DPCH. Must be aligned, which greatly increases the PAPR of the downlink transmit signal.

Regardless of whether the chipoffsets of multiple PCDHs are aligned, the UMTS downlink requires the application of PAPR reduction techniques. It is generally preferred to reduce the PAPR in the middle RF, because the signal sampling rate in the middle RF band is higher, closer to the analog signal.

However, there is currently no better way to reduce the PAPR of the baseband signal, which will cause the mid-range RF processing module to miss some peak signals. In severe cases, these missing peak signals will burn the power amplifier. Summary of the invention

Embodiments of the present invention provide a method, a device, and a baseband unit for controlling a peak-to-average power ratio, which are used to reduce a peak-to-average power ratio in a baseband signal, and to avoid a problem in which a peak signal in a medium-frequency radio wave burns a power amplifier.

The specific technical solutions are as follows:

A first aspect of the present invention provides a method for controlling a peak-to-average power ratio, including: determining, in a M dedicated physical channel of a cell, N pilot domains aligned at a first time, the first time alignment characterization pilot The time at which the domain appears in the frame of the dedicated physical channel is the same, where N,

M is a positive integer;

Obtaining pilot symbols corresponding to each pilot domain in the N pilot domains, and generating virtual pilot symbols corresponding to each pilot symbol, where the pilot symbols and the corresponding virtual pilot symbols are opposite to each other Number

Performing a spread spectrum scrambling process on each generated virtual pilot symbol to generate a virtual chip corresponding to each virtual pilot symbol; and

The actual chip corresponding to the first moment is superimposed with the generated virtual chip.

With reference to the first aspect, in a first possible implementation manner, before determining the N pilot domains at the first moment in the M dedicated physical channels of the cell, the method further includes:

Obtaining M dedicated physical channels in which the chip offsets are aligned in the cell, where the chip offset alignments indicate that the start times of the frames of the dedicated physical channel are the same or the start time is different by an integer multiple; It is determined that M is greater than or equal to the first predetermined threshold.

With reference to the first possible implementation in the first aspect, in a second possible implementation, after determining that M is greater than or equal to the first preset threshold, the method further includes:

Obtaining a sum of powers of the M dedicated physical channels;

Determining that the sum of the powers of the M dedicated physical channels is greater than or equal to a second predetermined threshold.

With reference to the first aspect, in a third possible implementation, the virtual pilot symbols corresponding to each pilot symbol are generated, including:

Determining an in-phase carrier component of the pilot symbol and a quadrature carrier component;

Generating, according to each pilot symbol, the virtual pilot symbols including the inverse of the in-phase carrier component and the inverse of the orthogonal carrier component.

With reference to the first aspect, in a fourth possible implementation, the virtual pilot symbols corresponding to each pilot symbol are generated, including:

A virtual pilot symbol having a power opposite to the pilot symbol and having a predetermined power is generated.

With reference to the first aspect, in a fifth possible implementation, the virtual pilot symbols corresponding to each pilot symbol are generated, including:

Determining a dedicated physical channel having the maximum power among the powers of the M dedicated physical channels, and acquiring a power variation between adjacent two time slots of the dedicated physical channel having the maximum power; The sum of the power variation amounts is determined as the power of the virtual pilot symbols; the virtual pilot symbols corresponding to the pilot symbols are generated, the virtual pilot symbols and the pilot symbols are opposite to each other, and the virtual pilots are The power of the symbol is the determined power.

With reference to the first aspect, in a sixth possible implementation, the virtual pilot symbols corresponding to each pilot symbol are generated, including:

Determining a dedicated physical channel having the maximum power among the powers of the M dedicated physical channels, and acquiring a power variation between adjacent two time slots of the dedicated physical channel having the maximum power; setting a preset The sum of the power and the amount of power change is determined as the power of the virtual pilot symbol; Generating a virtual pilot symbol corresponding to each pilot symbol, where the virtual pilot symbol and the pilot symbol are opposite to each other, and a part of the virtual pilot symbols in the virtual pilot symbol has a preset power, and The power of a portion of the virtual pilot symbols is a determined power.

In conjunction with the first aspect, in a seventh possible implementation, N is the total number of spreading codes that are orthogonal to the spreading codes used by the other downlink channels in the cell and are not used.

With reference to the first aspect, in an eighth possible implementation manner, N is a total number of spreading codes that are orthogonal to the spreading codes used by the other downlink channels in the cell and are not used, and a preset maximum number of virtual pilot symbols. The minimum value in .

A second aspect of the present invention provides an apparatus for controlling a peak average power ratio, including: a determining module, configured to determine, in a M dedicated physical channel of a cell, N pilot domains aligned at a first time, the first The time alignment characterizing the pilot domain is the same at the moment of occurrence of the frame of the dedicated physical channel, where N and M are positive integers;

And a generating module, configured to acquire pilot symbols corresponding to each pilot domain in the N pilot domains, and generate virtual pilot symbols corresponding to each pilot symbol, where the pilot symbols and corresponding virtual guides The frequency symbols are opposite to each other;

a processing module, configured to perform a spread spectrum scrambling process on each generated virtual pilot symbol, and generate a virtual chip corresponding to each virtual pilot symbol;

And a superimposing module, configured to superimpose the actual chip corresponding to the first moment and the generated virtual chip. In combination with the second aspect, in the first possible implementation manner, the method further includes:

And an acquiring module, configured to acquire M dedicated physical channels aligned in a chip offset in the cell, where the chip offset alignment indicates that the start time of the frame of the dedicated physical channel is the same or the start time is different by an integer multiple;

The determining module is configured to determine that M is greater than or equal to the first preset threshold.

With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner, the acquiring module is further configured to acquire a sum of powers of the M dedicated physical channels;

The determining module is further configured to determine that a sum of powers of the M dedicated physical channels is greater than or equal to a second preset threshold. With reference to the second aspect, in a third possible implementation, the generating module is specifically configured to determine an in-phase carrier component and an orthogonal carrier component of the pilot symbol, and generate each pilot symbol corresponding to the in-phase The inverse of the carrier component and the inverse of the orthogonal carrier component of the virtual pilot symbol.

With reference to the second aspect, in a fourth possible implementation, the generating module is specifically configured to generate a virtual pilot symbol having a power that is opposite to the pilot symbol and whose power is a preset power.

With reference to the second aspect, in a fifth possible implementation, the generating module is specifically configured to determine a dedicated physical channel having the maximum power among the powers of the M dedicated physical channels, and obtain the maximum power a power variation amount between two adjacent time slots of the dedicated physical channel; determining a sum of the preset power and the power variation amount as a power of the virtual pilot symbol; generating a virtual pilot symbol corresponding to each pilot symbol, The virtual pilot symbols and the pilot symbols are opposite to each other, and the power of the virtual pilot symbols is a determined power.

With reference to the second aspect, in a sixth possible implementation, the generating module is specifically configured to determine a dedicated physical channel having the maximum power among the powers of the M dedicated physical channels, and obtain the maximum power The amount of power change between two adjacent time slots of the dedicated physical channel; determining the sum of the preset set power and the power change amount as the power of the virtual pilot symbol; generating a virtual guide corresponding to each pilot symbol a frequency symbol, the virtual pilot symbol and the pilot symbol are opposite to each other, and a power of a part of the virtual pilot symbols in the virtual pilot symbol is a preset power, and a power of another part of the virtual pilot symbol is determined. Power.

Combining the first possible implementation of the second aspect or the second possible implementation of the second aspect or the third possible implementation of the second aspect or the fourth possible implementation of the second aspect or A fifth possible implementation of the second aspect or a sixth possible implementation of the second aspect, the apparatus being located in a baseband unit.

An embodiment of the present invention provides a method for controlling a peak average power ratio, determining N pilot domains aligned at a first time in M dedicated physical channels of a cell, and acquiring each pilot domain in N pilot domains. Corresponding pilot symbols, and generating virtual pilot symbols corresponding to each pilot symbol; performing spread spectrum scrambling processing on each generated virtual pilot symbol to generate corresponding virtual pilot symbols respectively a virtual chip; superimposing the actual chip corresponding to the first moment and the generated virtual chip. Through the chip, the PAPR in the baseband signal can be effectively reduced, thereby reducing the calculation pressure of reducing the PAPR in the middle radio frequency, providing effective protection for the power amplifier, and improving the security and stability of the entire UMTS. DRAWINGS

1 is a downlink channel slot diagram in the prior art;

FIG. 2 is a flowchart of a method for controlling a peak average power ratio according to an embodiment of the present invention; FIG. 3 is a schematic diagram of determining a virtual pilot symbol based on an I and Q coordinate system according to an embodiment of the present invention; FIG. Schematic diagram of slice superposition;

FIG. 5 is a schematic structural diagram of an apparatus for controlling a peak average power ratio according to an embodiment of the present invention; FIG. 6 is a schematic structural diagram of another apparatus for controlling a peak average power ratio according to an embodiment of the present invention. detailed description

The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Embodiment 1:

First, a common method for reducing the peak-to-average power ratio is performed in a remote radio unit (English: Remote Radio Unit, RRU), that is, reducing the PAPR in the middle radio frequency stage, but the method in the embodiment of the present invention It is applied to the baseband unit (BBU) to correct the chip sequence sent to the RRU in the BBU, thereby reducing the PAPR in the chip sequence sent by the BBU to the RRU.

FIG. 2 is a flowchart of a method for controlling a peak average power ratio according to an embodiment of the present invention, where the method includes:

S201: Determine, in the M dedicated physical channels of the cell, N pilot domains that are aligned at the first time; S202, acquire pilot symbols corresponding to each pilot domain in the N pilot domains, and generate each pilot. Virtual pilot symbols corresponding to the respective symbols; S203, performing a spread spectrum scrambling process on each generated virtual pilot symbol, and generating a virtual chip corresponding to each virtual pilot symbol;

S204: Superimpose the actual chip corresponding to the first moment and the generated virtual chip.

In the embodiment of the present invention, in the case that the chipoffset parameter alignment of the dedicated physical channel needs to be solved, causing the problem that the PAPR in the baseband signal is extremely high, the cell needs to be acquired before determining the N pilot domains aligned at the first time. The chipoffset of the dedicated physical channel, which represents the start of the frame in the dedicated physical channel.

For example, in FIG. 1, the chipoffset represents the start time of the frame in the DPCH corresponding to the user. In FIG. 1, the start time of the frame of the partial DPCH is the same, if the frame of the DPCH is not the same at the beginning time, When the starting time difference is 2560 chips, the chipoffset of these DPCHs is also aligned, so the chipoffset alignment here is defined as chipoffset equal, or the remainder after chipoffset divided by 2560 is equal.

The aligned chipoffset is determined in the acquired chipoffset, and the total number of all dedicated physical channels corresponding to the aligned chipoffset is counted, that is, M dedicated physical channels, where the size of M determines whether the chip sequence in the BBU is determined. The correction is performed, that is, when M is greater than or equal to the first preset threshold, the chip sequence is corrected; if M is smaller than the first preset threshold, the chip sequence does not need to be corrected.

Optionally, in the embodiment of the present invention, in addition to determining whether to correct the chip sequence by the total number of dedicated physical channels aligned by chipoffset, whether the chip sequence is corrected may be determined by combining the power of the dedicated physical channel.

Specifically, after determining that the total number of dedicated physical channels aligned by the chipoffset exceeds the first preset threshold, the sum of the powers of the M dedicated physical channels is further acquired, and then it is determined whether the sum of the powers of the M dedicated physical channels is greater than or equal to the second. If the sum of the powers of the M dedicated physical channels is greater than or equal to the second preset threshold, the chip sequence needs to be corrected; if the sum of the powers of the M dedicated physical channels is less than the second preset threshold , there is no need to correct the chip sequence.

In addition, it should be noted that whether the chip sequence is corrected by the total number of dedicated physical channels aligned by chipoffset and the sum of powers of dedicated physical channels aligned by chipoffset The technical solutions obtained by those skilled in the art without any inventive work on the basis of the embodiments of the present invention are all within the scope of the embodiments of the present invention.

After determining the chipoffset alignment of the M dedicated physical channels, and M is greater than or equal to the first preset threshold, the system determines the N pilot domains aligned in the first time in the M dedicated physical channels, of course Both M and N are positive integers.

The first time alignment here indicates that the timing of the pilot domain appearing in the frame of the dedicated physical channel is the same. As shown in FIG. 1, the appearance of the pilot domain in the elliptical circle in FIG. 1 is the same, that is: within the elliptical circle The pilot domain is aligned at the first moment.

There are a plurality of time slots in one frame of the dedicated physical channel, and the following is a description of one time slot of the frame of the dedicated physical channel. In FIG. 1, one time slot represents one from DATA1 to Pilot, one time slot exists. In the pilot domain, since the chip offsets of the M dedicated physical channels are aligned, the M pilot domains corresponding to the M dedicated physical channels also appear at the same time, and the determined first pilot time in the N pilot domains is determined. N=M.

Optionally, in the embodiment of the present invention, in order to ensure that the pilot domain can determine the final virtual chip, it is necessary to determine the number of pilot domains that should be obtained. The number is determined by a spreading code that is orthogonal to the spreading code used by other downlink channels in the cell and is not used, for example, orthogonal to the spreading code used by other downlink channels, and the number of unused spreading codes is 10. At the time, the number of pilot domains that should be determined in the M dedicated physical channels is 10, so there is no direct relationship between the number of pilot domains and the number of dedicated physical channels that need to be explained by using other downlink channels. Relationship, that is, M does not have a direct impact on N.

Optionally, in the embodiment of the present invention, in addition to determining the number of pilot domains that should be obtained by using the number of spreading codes that are orthogonal to the spreading codes used by the other downlink channels and are not used, the system may be combined with the system. The maximum number of virtual pilot symbols preset in the medium determines the number of pilot domains that should be obtained, that is, the minimum value is determined among the number of unused spreading codes and the maximum number of virtual pilot symbols, and the minimum number is corresponding. The resulting total number of pilot fields, such as spread spectrum used with other downstream channels The coded orthogonal and unused spread code number is 10, and the maximum number of virtual pilot symbols preset in the system is 15, and 10 pilot domains should be determined from the M dedicated physical channels.

After determining the N pilot domains in the M dedicated physical channels, the system determines the pilot symbols corresponding to each pilot domain, and then generates corresponding virtual pilot symbols based on the pilot symbols, in the embodiment of the present invention. The virtual pilot symbols can be generated by, but not limited to, the following methods:

The IQ symbol is decomposed into an in-phase carrier component and an orthogonal carrier component by an IQ modulation method. For example, in the coordinate system shown in FIG. 3, the pilot symbol can be decomposed to the I-path to obtain an in-phase carrier component, and decomposed into the Q-path to obtain a positive Cross carrier component.

Then, after determining the in-phase carrier component and the orthogonal carrier component, determining the inverse of the in-phase carrier component of the pilot symbol, and the inverse of the orthogonal carrier component, the inverse of the in-phase carrier component and the orthogonal carrier The symbols consisting of the opposite numbers of the components are determined as virtual pilot symbols. That is to say, the inverse of the in-phase carrier component and the inverse of the orthogonal carrier component are included in the virtual pilot symbol.

For example, in FIG. 3, if the pilot symbol is in the first quadrant of the I and Q coordinate systems, the virtual pilot symbol is in the third quadrant, that is, the pilot symbol and the virtual pilot symbol are symmetric with respect to the origin; if it is a pilot symbol When in the second quadrant, the virtual pilot symbols are in the fourth quadrant.

Optionally, before the virtual pilot symbols are generated, the power corresponding to the generated virtual pilot symbols may also be determined, because the virtual chip power in the pilot domain superimposed to the dedicated physical channel is too low, and the PAPR is not reduced. The role of the virtual chip is too high, not only can not effectively reduce the PAPR, but also increase the PAPR in the baseband signal.

The power of the virtual chip is determined by the virtual pilot symbol. For example, the virtual pilot symbol is a, and the spreading code is c(n), where n=l, 2, 3, 4... SF, virtual The power of the pilot symbol is P, then the virtual chip for superposition generated after the last spread spectrum scrambling is sqrt(P)*a*c(n), from which the pilot symbol can be determined to determine a pilot symbol. The power of the virtual pilot symbols in the embodiment of the present invention may be, but is not limited to, determined by:

Method 1: Before generating the virtual pilot symbols, first adjust the settings preset in UMTS. Power, the set power is used to indicate the power that the generated virtual pilot symbols can have, so according to the set power in the UMTS, the generated power of each virtual pilot symbol should be preset in the UMTS. Set the power.

Manner 2: Determining a dedicated physical channel with maximum power in the dedicated physical channel used in the UMTS, and then acquiring the amount of power change between adjacent two time slots of the dedicated physical channel having the maximum power, that is, the dedicated The difference between the power that the physical channel has in the current time slot and the power that the previous time slot has. The obtained power variation is used as a variable of the power of the virtual pilot symbol, that is, how much the dedicated physical channel power having the maximum power is changed, and the power of the generated virtual pilot symbol is also changed.

For example, the preset power preset for the virtual pilot symbols in UMTS is A, if the power of the dedicated physical channel having the maximum power in the current time slot is B _l and the dedicated physical channel having the maximum power is in the previous time The power in the gap is B. At this time, the power variation of the dedicated physical channel having the maximum power is (BrBo). If ^ and ^ are equal, the power of the virtual pilot symbol generated at this time is A; if ^ and ^ are not equal, then generated The power of the virtual pilot symbols is A + ( B Bo ), that is, once the power of the dedicated physical channel with the largest power changes, the power of the virtual pilot symbols also changes.

Manner 3: In this manner, the power of each virtual pilot symbol is determined by combining mode 1 and mode 2. Specifically, a part of the generated virtual pilot symbols have a set power, and another part of the generated virtual pilot symbols The power is then changed as the power of the dedicated physical channel with the greatest power changes.

The power of the virtual pilot symbols can be determined by any of the above three methods. Of course, different manners can be selected to determine the power of the virtual pilot symbols according to different application scenarios.

Since the virtual pilot symbols are superimposed into the pilot domain of the dedicated physical channel, but are virtual chips generated after the virtual pilot symbols are scrambled by the spread spectrum, after the virtual pilot symbols are obtained, the virtual guides are needed. The frequency symbols are subjected to spread spectrum scrambling processing.

It should be noted here that the spreading codes used for spreading and scrambling the virtual pilot symbols are Is a spreading code that is orthogonal to the spreading code used by other downlink channels in the cell and is not used, so the virtual chip generated after the spread scrambling process and the actual chip generated in the pilot domain Orthogonal.

Since the above process is for the pilot field aligned in the first time in one slot, the generated virtual chip is also the same initial time as the actual chip in the pilot domain aligned with the first time, and the generated virtual chip is only generated. Can be superimposed with the actual chips in the pilot domain, where the superposition is to superimpose all the generated virtual chips with the actual chips in the N pilot domains and the actual chips corresponding to the first time on other channels, for example As shown in FIG. 4, the actual chip and the virtual chip are included in the elliptical circle, and the actual chip in the elliptical circle is superimposed with the virtual chip. Of course, the actual chip corresponding to the first time on other channels is also superimposed. .

For example, the pilot symbol A is subjected to spread spectrum scrambling to generate actual chips A1 and A2, and the virtual pilot symbol B is subjected to spread spectrum scrambling to generate virtual chips B1 and B2, wherein A1 and B1 are chips generated at the same time. On the other channel, the actual chips at the same time as A1 and B1 are C1 and D1, A2 and B2 are chips generated at the same time, and the actual chips at the same time as A2 and B2 are C2 and D2. Therefore, in the process of superposition, the actual chips A1, C1, and D1 are superimposed with the virtual chips B1, and the actual chips A2, C2, and D2 are superimposed with the virtual chips B2, so that the accuracy of the superposition can be achieved. In the process of chip superposition, only the chips at the same time will be superimposed, so that the virtual chips generated by the virtual pilot symbols can be superimposed with the actual chips in the pilot domain of the dedicated physical channel, due to the virtual guide. The virtual chip corresponding to the frequency symbol is orthogonal to the actual chip in the pilot domain, so that the virtual chip corresponding to the virtual pilot symbol and the actual chip in the pilot domain are superimposed to effectively reduce the PAPR in the baseband signal. Therefore, the algorithm for reducing the PAPR in the middle frequency RF does not cause the leakage, improves the efficiency of the power amplifier, and effectively avoids the problem that the power amplifier is burnt due to the high PAPR.

In the foregoing embodiment, after superimposing the virtual chips generated according to the virtual pilot symbols in the baseband signal, the PAPR in the baseband signal can be effectively reduced, thereby reducing the calculation pressure of reducing the PAPR in the medium radio frequency. The power amplifier provides effective protection and improves the security and stability of the entire UMTS. In the above embodiment, S203~S206 are processes for the pilot domain in one slot of the M dedicated physical channels, and the processing process of the pilot domain on other time slots is exactly the same as the above content, where is not here. Narration.

Embodiment 2:

A device for controlling a peak-to-average power ratio according to the first embodiment of the present invention further provides a device for controlling a peak-to-average power ratio. As shown in FIG. 5, the device includes: a determining module 501, Determining N pilot fields aligned at a first time in the M dedicated physical channels of the cell, where the first time alignment characterizes that the pilot domain appears at the same time in a frame of the dedicated physical channel, where, N, M Is a positive integer;

The generating module 502 is configured to acquire pilot symbols corresponding to each pilot domain in the N pilot domains, and generate virtual pilot symbols corresponding to each pilot symbol, where the pilot symbols and corresponding virtual symbols The pilot symbols are opposite to each other;

The processing module 503 is configured to perform a spread spectrum scrambling process on each generated virtual pilot symbol, and generate a virtual chip corresponding to each virtual pilot symbol;

The overlay module 504 is configured to overlap the actual chip corresponding to the first moment and the generated virtual chip.

Further, as shown in FIG. 6, the device further includes:

The obtaining module 601 is configured to acquire M dedicated physical channels in which the chip offsets are aligned in the cell, where the chip offset alignment indicates that the start time of the frames of the dedicated physical channel is the same or the starting time is different by an integer multiple;

The determining module 602 is configured to determine that M is greater than or equal to the first preset threshold.

Further, the obtaining module 601 is further configured to obtain a sum of powers of the M dedicated physical channels. The determining module 602 is further configured to determine that a sum of powers of the M dedicated physical channels is greater than or equal to a second preset threshold.

Further, the generating module 502 is specifically configured to determine an in-phase carrier component and an orthogonal carrier component of the pilot symbol, and generate an inverse number of the in-phase carrier component and an inverse of the orthogonal carrier component corresponding to each pilot symbol. The virtual pilot symbol. And the power is a virtual pilot symbol of preset power.

Further, the generating module 502 is specifically configured to determine a dedicated physical channel having the maximum power among the powers of the M dedicated physical channels, and acquire power between adjacent two time slots of the dedicated physical channel with the maximum power. The amount of the change is determined by the sum of the preset power and the amount of power change as the power of the virtual pilot symbol; generating a virtual pilot symbol corresponding to each pilot symbol, where the virtual pilot symbol and the pilot symbol are mutually The opposite number, and the power of the virtual pilot symbols is a determined power.

Further, the generating module 502 is specifically configured to determine a dedicated physical channel having the maximum power among the powers of the M dedicated physical channels, and acquire power between adjacent two time slots of the dedicated physical channel with the maximum power. a quantity of the change; determining a sum of the preset set power and the power change amount as the power of the virtual pilot symbol; generating a virtual pilot symbol corresponding to each pilot symbol, the virtual pilot symbol and the pilot The symbols are opposite to each other, and the power of a part of the virtual pilot symbols in the virtual pilot symbols is a preset power, and the power of another part of the virtual pilot symbols is a determined power.

Embodiment 3:

A baseband unit is further provided in the embodiment of the present invention, the baseband unit includes one or more processors, a memory, and one or more programs; one or more programs are stored in the memory and processed by one or more Calling and executing one or more programs from memory;

One or more of the programs here are configured to perform the following steps:

Determining N pilot domains aligned at a first time in the M dedicated physical channels of the cell, where the first time alignment characterizes that the pilot domain appears in a frame of the dedicated physical channel, where N, M are Positive integer

The actual chip corresponding to the first moment is superimposed with the generated virtual chip. It should be noted that N is the total number of spreading codes that are orthogonal to the spreading codes used by other downlink channels in the cell and are not used; or N is the spreading code used in the cell with other downlink channels. The total number of spread codes that are used and not used and the minimum of the preset maximum number of virtual pilot symbols.

Further, one or more programs are also configured to perform the steps:

Obtaining M dedicated physical channels in which the chip offsets are aligned in the cell, where the chip offset alignments indicate that the start times of the frames of the dedicated physical channels are the same or the start time is different by an integer multiple;

It is determined that M is greater than or equal to the first preset threshold.

Further, one or more programs are also configured to perform the steps:

Obtaining a sum of powers of the M dedicated physical channels;

Further, one or more programs are also configured to perform the steps:

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowcharts and/or block diagrams, and combinations of flow and/or blocks in the flowcharts and/or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Although the preferred embodiment of the invention has been described, it will be apparent to those skilled in the < Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and modifications It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of the inventions

Claims

Rights request

1. A method of controlling the peak-to-average power ratio, characterized by including:

Determine N pilot domains aligned at the first moment among the M dedicated physical channels of the cell. The first moment alignment indicates that the pilot domains appear at the same time in the frame of the dedicated physical channel, where N and M are positive integer;

Obtain the pilot symbols corresponding to each pilot domain in the N pilot domains, and generate virtual pilot symbols corresponding to each pilot symbol, where the pilot symbols and the corresponding virtual pilot symbols are opposite to each other. number;

Perform spread spectrum scrambling processing on each generated virtual pilot symbol to generate virtual chips corresponding to each virtual pilot symbol; and

The actual chips corresponding to the first moment and the generated virtual chips are superimposed.

2. The method according to claim 1, characterized in that, before determining the N pilot domains at the first moment among the M dedicated physical channels of the cell, it further includes:

Obtain M dedicated physical channels in the cell whose chip offsets are aligned, and the chip offset alignment indicates that the starting times of the frames of the dedicated physical channels are the same or the starting times differ by an integer multiple;

Determine whether M is greater than or equal to the first preset threshold.

3. The method according to claim 2, characterized in that, after determining that M is greater than or equal to the first preset threshold, further comprising:

Obtain the total power of the M dedicated physical channels;

It is determined that the sum of powers of the M dedicated physical channels is greater than or equal to the second preset threshold.

4. The method of claim 1, wherein generating virtual pilot symbols corresponding to each pilot symbol includes:

Determining the in-phase carrier component and the orthogonal carrier component of the pilot symbol;

The virtual pilot symbols corresponding to each pilot symbol including the inverse number of the in-phase carrier component and the inverse number of the orthogonal carrier component are generated.

5. The method of claim 1, wherein generating virtual pilot symbols corresponding to each pilot symbol includes:

Generate a virtual pilot symbol having an inverse number to the pilot symbol and having a power that is a preset power.

6. The method of claim 1, wherein generating virtual pilot symbols corresponding to each pilot symbol includes:

Determine the dedicated physical channel with the maximum power among the powers of the M dedicated physical channels, and obtain the power variation between two adjacent time slots of the dedicated physical channel with the maximum power; compare the preset power with the The sum of the power changes is determined as the power of the virtual pilot symbol; generating a virtual pilot symbol corresponding to each pilot symbol, the virtual pilot symbol and the pilot symbol are opposite numbers of each other, and the virtual pilot symbol The power of a symbol is a determined power.

7. The method of claim 1, wherein generating virtual pilot symbols corresponding to each pilot symbol includes:

Determine the dedicated physical channel with the maximum power among the powers of the M dedicated physical channels, and obtain the power variation between two adjacent time slots of the dedicated physical channel with the maximum power; change the preset settings The sum of the power and the power variation is determined as the power of the virtual pilot symbol; generate a virtual pilot symbol corresponding to each pilot symbol, the virtual pilot symbol and the pilot symbol are opposite numbers of each other, and the The power of a part of the virtual pilot symbols in the virtual pilot symbols is a preset power, and the power of another part of the virtual pilot symbols is a determined power.

8. The method of claim 1, wherein N is the total number of unused spreading codes that are orthogonal to spreading codes used by other downlink channels in the cell.

9. The method of claim 1, wherein N is the total number of unused spreading codes in the cell that are orthogonal to spreading codes used by other downlink channels and the preset maximum number of virtual pilot symbols. the minimum value in .

10. A device for controlling peak-to-average power ratio, characterized in that it includes: Determining module, configured to determine the N pilot domains aligned at the first time among the M dedicated physical channels of the cell, where the first time alignment indicates that the pilot domains appear at the same time in the frame of the dedicated physical channel, where , N and M are positive integers;

Generating module, configured to obtain pilot symbols corresponding to each pilot domain in the N pilot domains, and generate virtual pilot symbols corresponding to each pilot symbol, where the pilot symbols are consistent with the corresponding virtual pilot symbols. Frequency signs are opposites of each other;

A processing module, configured to perform spread spectrum scrambling processing on each generated virtual pilot symbol, and generate virtual chips corresponding to each virtual pilot symbol;

A superposition module, configured to superimpose the actual chips corresponding to the first moment and the generated virtual chips.

11. The device according to claim 10, further comprising:

The acquisition module is used to acquire M dedicated physical channels with chip offset alignment in the cell. The chip offset alignment represents that the starting times of the frames of the dedicated physical channels are the same or the starting times differ by an integer multiple;

A determination module is used to determine that M is greater than or equal to the first preset threshold.

12. The device according to claim 11, characterized in that the acquisition module is also used to acquire the total power of the M dedicated physical channels;

The determination module is also configured to determine that the sum of powers of the M dedicated physical channels is greater than or equal to a second preset threshold.

13. The apparatus according to claim 10, wherein the generating module is specifically used to determine the in-phase carrier component and the orthogonal carrier component of the pilot symbol, and generate the in-phase carrier component corresponding to each pilot symbol including the in-phase carrier component. carrier component inverse and the virtual pilot symbol of the orthogonal carrier component inverse.

14. The device according to claim 10, wherein the generating module is specifically configured to generate a virtual pilot symbol that is the opposite number of the pilot symbol and whose power is a preset power.

15. The device according to claim 10, wherein the generating module is specifically configured to determine the dedicated physical channel with the maximum power among the powers of the M dedicated physical channels, and obtain the dedicated physical channel with the maximum power. The amount of power change between two adjacent time slots of the dedicated physical channel; the preset Assume that the sum of the power and the power variation is determined as the power of the virtual pilot symbol; generate a virtual pilot symbol corresponding to each pilot symbol, the virtual pilot symbol and the pilot symbol are opposite numbers of each other, and The power of the virtual pilot symbol is a determined power.

16. The device according to claim 10, wherein the generating module is specifically configured to determine the dedicated physical channel with the maximum power among the powers of the M dedicated physical channels, and obtain the dedicated physical channel with the maximum power. The power change amount between two adjacent time slots of the dedicated physical channel; Determine the sum of the preset set power and the power change amount as the power of the virtual pilot symbol; Generate a virtual pilot corresponding to each pilot symbol frequency symbols, the virtual pilot symbols and the pilot symbols are inverse numbers of each other, and the power of a part of the virtual pilot symbols in the virtual pilot symbols is a preset power, and the power of another part of the virtual pilot symbols is a determined of power.

17. The device according to claims 10-16, characterized in that the device is located in a baseband unit.