WO2017012448A1 - 一种信号发送、解调方法以及设备和系统 - Google Patents

一种信号发送、解调方法以及设备和系统 Download PDF

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Publication number
WO2017012448A1
WO2017012448A1 PCT/CN2016/086760 CN2016086760W WO2017012448A1 WO 2017012448 A1 WO2017012448 A1 WO 2017012448A1 CN 2016086760 W CN2016086760 W CN 2016086760W WO 2017012448 A1 WO2017012448 A1 WO 2017012448A1
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power ratio
base station
original
power
pdcch signal
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PCT/CN2016/086760
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English (en)
French (fr)
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汪浩
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华为技术有限公司
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Priority to EP16827139.3A priority Critical patent/EP3307006B1/en
Publication of WO2017012448A1 publication Critical patent/WO2017012448A1/zh
Priority to US15/873,887 priority patent/US20180146436A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/024—Channel estimation channel estimation algorithms
    • H04L25/0242—Channel estimation channel estimation algorithms using matrix methods
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/0073—Allocation arrangements that take into account other cell interferences
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/16—Deriving transmission power values from another channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/20—TPC being performed according to specific parameters using error rate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/32—TPC of broadcast or control channels
    • H04W52/325—Power control of control or pilot channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • H04B1/7105—Joint detection techniques, e.g. linear detectors
    • H04B1/71055—Joint detection techniques, e.g. linear detectors using minimum mean squared error [MMSE] detector
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • H04B1/7105—Joint detection techniques, e.g. linear detectors
    • H04B1/71057—Joint detection techniques, e.g. linear detectors using maximum-likelihood sequence estimation [MLSE]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • H04B1/7107—Subtractive interference cancellation
    • H04B1/71072—Successive interference cancellation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0473—Wireless resource allocation based on the type of the allocated resource the resource being transmission power
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/20—Interfaces between hierarchically similar devices between access points

Definitions

  • Embodiments of the present invention relate to the field of communications technologies, and in particular, to a signal transmission and demodulation method, and a device and system.
  • LTE Long Term Evolution
  • the physical downlink control channel (PDCCH) signal can be divided into a pilot signal used for channel measurement, and a control signal, where the control signal includes indication information indicating a specific location of the downlink and uplink air interface resources of the terminal, and physical
  • the downlink shared channel (PDSCH) is a channel that mainly carries user terminal data.
  • the terminal Before demodulating the PDSCH signal, the terminal needs to correctly demodulate the control signal sent by the base station in the PDCCH signal, and then according to the indication information in the control signal. Obtaining data information corresponding to the current terminal in the PDSCH signal. Therefore, the demodulation performance of the PDCCH signal determines the size of the user throughput.
  • the high-density and heterogeneity of the base station makes the co-channel interference between the inter-cell or multi-terminal received by the PDCCH signal and the PDSCH signal more serious.
  • the terminal In order to reduce the same-frequency interference, the terminal usually adopts the Minimum Mean Square Error (MMSE) algorithm, the Symbol Level Interference Cancellation (SLIC), and the Maximum Likelihood (Sim).
  • MMSE Minimum Mean Square Error
  • SLIC Symbol Level Interference Cancellation
  • SI Maximum Likelihood
  • the ML) algorithm demodulates the PDSCH signal, and thus the demodulation performance of the PDSCH signal is good, and the efficiency of correctly demodulating the data is high.
  • the terminal usually demodulates the PDCCH signal by using Maximum Ratio Combining (MRC) or Interference Rejection Combining (IRC), which suppresses the same-frequency interference capability.
  • MRC Maximum Ratio Combining
  • IRC Interference Rejection Combining
  • the embodiments of the present invention provide a signal transmission and demodulation method, a device, and a system, which can solve the problem that the user throughput is low due to the poor demodulation performance of the PDCCH signal and the demodulation performance of the PDSCH signal in the prior art. .
  • a signal transmission method comprising:
  • the base station of the serving cell acquires a preset first power ratio limit set of the at least one interfering cell base station, where the element in the first power ratio limit set is a preset ratio of the first power ratio, and the first power ratio is the a ratio of a power of the first original control signal and a power of the first original pilot signal in the first original physical downlink control channel PDCCH signal sent by the base station of the interfering cell through the first transmission channel;
  • the base station of the serving cell sends a preset second power ratio limit set and the first power ratio limit set to the terminal, where the second power ratio limit set is a preset of the second power ratio a ratio of the power of the second original control signal in the second original PDCCH signal sent by the base station of the serving cell to the power of the second original pilot signal;
  • the base station of the serving cell sends the second original PDCCH signal to the terminal, and the current ratio of the second power ratio of the second original PDCCH signal is an element selected from the second power ratio limiting set.
  • the base station of the serving cell sends the preset second power ratio limiting set and the first power ratio limiting set to the terminal, including :
  • the base station of the serving cell sends the preset second power ratio limit set and the first power ratio limit set to the terminal by using high layer signaling.
  • the base station of the serving cell sends the second original PDCCH information
  • the number sent to the terminal includes:
  • the base station of the serving cell divides a plurality of resource units corresponding to the second original PDCCH signal corresponding to the terminal into one resource unit group;
  • the base station of the serving cell selects an element for the resource unit group from the second power ratio restriction set according to a preset rule
  • the base station of the serving cell configures, according to the selected element, a second power ratio of the second original PDCCH signal in the resource unit group to the current ratio, and passes the second original PDCCH signal to the resource unit group. Send to the terminal.
  • a signal demodulation method comprising:
  • the terminal receives the second power ratio limitation set in the first power ratio limitation set
  • the element is a preset ratio of the first power ratio, where the first power ratio is the power of the first original control signal in the first original physical downlink control channel PDCCH signal sent by the base station of the interfering cell through the first transmission channel a ratio of power of an original pilot signal, the second power ratio is a preset ratio of the second power ratio of the element in the restricted set, and the second power ratio is sent by the base station of the serving cell by using the second transmission channel Ratio of the power of the second original control signal to the power of the second original pilot signal in the second original PDCCH signal;
  • the terminal receives a PDCCH signal, where the PDCCH signal includes a second PDCCH signal that is sent by the base station of the serving cell to the terminal by using the second original PDCCH signal, and the interfering cell
  • the first original PDCCH signal sent by the base station is transmitted to the first PDCCH signal of the terminal by using the first transmission channel;
  • the terminal demodulates the PDCCH signal according to the first power ratio limiting set and the second power ratio limiting set, thereby obtaining the second original PDCCH signal.
  • the terminal receives a preset first power ratio limit set of the at least one interfering cell of the at least one interfering cell sent by the base station of the serving cell, and the serving cell
  • the second power ratio limit set preset by the base station includes:
  • the terminal receives the high layer signaling sent by the base station of the serving cell, where the high layer signaling carries the first power ratio limiting set and the second power ratio limiting set.
  • the terminal demodulates the PDCCH signal according to the first power ratio limiting set and the second power ratio limiting set, so that obtaining the second original PDCCH signal includes:
  • the terminal obtains the first power ratio and the second power ratio according to a preset estimation algorithm, the first power ratio limiting set, and the second power ratio limiting set;
  • the terminal demodulates the PDCCH signal by using a preset demodulation algorithm according to the first channel matrix and the second channel matrix, to obtain the second original PDCCH signal.
  • the preset estimation algorithm includes a generalized maximum likelihood algorithm or a minimum energy algorithm.
  • a base station including:
  • An acquiring unit configured to acquire a preset first power ratio limit set of the at least one interfering cell base station, where the element in the first power ratio limit set is a preset ratio of the first power ratio, where the first power ratio is a ratio of a power of the first original control signal and a power of the first original pilot signal in the first original physical downlink control channel PDCCH signal sent by the base station of the interfering cell through the first transmission channel;
  • a sending unit configured to send, to the terminal, a preset second power ratio limiting set and the first power ratio limiting set, where the element in the second power ratio limiting set is a preset ratio of the second power ratio
  • the second power ratio is a ratio of a power of the second original control signal and a power of the second original pilot signal in the second original PDCCH signal sent by the base station of the serving cell;
  • the sending unit is further configured to send the second original PDCCH signal to the terminal, where a current ratio of a second power ratio of the second original PDCCH signal is selected from the second power ratio limiting set. element.
  • the sending unit is specifically configured to:
  • the sending unit is specifically configured to:
  • a terminal including:
  • a receiving unit configured to receive a first power ratio limit set preset by a base station of the at least one interfering cell sent by the base station of the serving cell, and a second power ratio limit set preset by the base station of the serving cell, where the first power ratio is The element in the restricted set is a preset ratio of the first power ratio, where the first power ratio is the first original control signal in the first original physical downlink control channel PDCCH signal sent by the base station of the interfering cell through the first transport channel.
  • the ratio of the power to the power of the first original pilot signal, the element in the second power ratio limiting set is a preset ratio of the second power ratio, and the second power ratio is the base station of the serving cell a ratio of a power of the second original control signal and a power of the second original pilot signal in the second original PDCCH signal transmitted by the second transmission channel;
  • the receiving unit is further configured to receive a PDCCH signal, where the PDCCH signal includes a second PDCCH signal that is sent by the second base PDCCH signal sent by the base station of the serving cell to the terminal by using the second transmission channel, and The first original PDCCH signal sent by the base station of the interfering cell is transmitted to the first PDCCH signal of the terminal by using the first transmission channel;
  • a processing unit configured to demodulate the PDCCH signal according to the first power ratio limiting set and the second power ratio limiting set, to obtain the second original PDCCH signal.
  • the receiving unit is specifically configured to:
  • the processing unit is specifically configured to:
  • the first power ratio limit set, and the second power limit Determining the set to obtain the first power ratio and the second power ratio;
  • the preset estimation algorithm includes a generalized maximum likelihood algorithm or a minimum energy algorithm.
  • the fifth aspect provides a system, including the base station according to any implementation manner of the third aspect, and the terminal according to any implementation manner of the fourth aspect.
  • An embodiment of the present invention provides a signal transmission and demodulation method, and a device and a system, where a base station of a serving cell obtains a first power ratio limit set preset by at least one interfering cell, and sets the first power ratio restriction set and the serving cell.
  • the second power ratio preset set of the base station is sent to the terminal, and the power of the second original control signal and the power of the second original pilot signal sent to the terminal are configured according to the preset power ratio in the second power ratio limit set.
  • the ratio is such that the terminal can obtain the first power ratio and the second power ratio according to the first power ratio limit set and the second power ratio limit set estimate, thereby obtaining the first channel matrix and the second channel matrix, thereby adopting MMSE, SLIC
  • the ML signal such as ML, can effectively reduce the PDCCH signal in the demodulation resource unit of the same-frequency interference to obtain the second original PDCCH signal, so that the demodulation performance of the PDCCH signal can be improved.
  • FIG. 1 is a schematic diagram of a basic network architecture of an LTE system
  • FIG. 2 is a schematic diagram of another LTE system network architecture
  • FIG. 3 is a schematic structural diagram of a resource block in an LTE system according to an embodiment of the present disclosure
  • FIG. 4 is a schematic flowchart of a method according to an embodiment of the present invention.
  • FIG. 5 is a schematic flowchart of another method according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic flowchart of another method according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic flowchart of another method according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of another base station according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of another terminal according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic structural diagram of a system according to an embodiment of the present invention.
  • LTE systems generally employ Orthogonal Frequency Division Multiplexing (OFDM) and Multiple-Input Multiple-Output (MIMO) technologies as standards for wireless network evolution.
  • OFDM Orthogonal Frequency Division Multiplexing
  • MIMO Multiple-Input Multiple-Output
  • FIG. 1 The basic network architecture of the LTE system using OFDM technology to transmit signals through multiple transmit antennas and multiple receive antennas can be seen in FIG. 1 , where 001 can be a base station (or an access point, etc.), and 002-009 can be a terminal (or mobile).
  • the station, the remote station, the user equipment, etc., the base station 001 and the terminals 002-009 may each include one or more antennas.
  • the terminal can be a user equipment such as a mobile phone, an iPad, or a personal digital assistant.
  • a cell under the jurisdiction of one physical base station may be one or more, and there are interfaces (for example, an X2 interface) that communicate with each other between different base stations.
  • the same base station jurisdiction cell 2 may be an interfering cell of the serving cell; the cell under different base station jurisdiction may also be a serving cell interference.
  • the cell for example, the cell 3 and the cell 4 under the control of the base station 2 and the cell 5 under the control of the base station 3 may also be the interfering cell of the serving cell, and the cell has a one-to-one correspondence with the identity code (Identification, ID) of the cell, and the ID of the cell is unique. Identify a cell.
  • An interface 1 exists between the base station 1 and the base station 2
  • an interface 2 exists between the base station 1 and the base station 3
  • an interface 3 exists between the base station 2 and the base station 3.
  • the original PDCCH signal transmitted by the base station passes through the resources as shown in FIG.
  • the blocks are transmitted in a physical transport channel, wherein each small square represents one resource unit, and the original PDCCH signal is divided in units of resource units.
  • the PDCCH signal transmitted by multiple base stations may be included in the same resource unit.
  • the PDCCH signal received by the terminal may include multiple resource units, where an expression of the signal in any resource unit may be expressed as Equation 1:
  • y can represent the received PDCCH signal
  • x 0 can represent the second original PDCCH signal sent by the base station of the serving cell, and specifically can be the second original pilot signal or the second original control signal in the second original PDCCH signal
  • the second original control signal may specifically include information such as scheduling control, transmission format, resource allocation, uplink scheduling grant, power control, and uplink retransmission
  • the second channel matrix of the second transport channel between the base station and the terminal of the serving cell may be represented, and the second channel matrix may be understood as the transmission characteristic of the second original control signal of the second transport channel pair resource unit
  • the second PDCCH signal that is transmitted by the second original PDCCH signal to the terminal by the second transmission channel may be represented
  • x i may represent the first original pilot in the first original PDCCH signal sent by the base station of the i-th interfering cell in the at least one interfering cell
  • the first original control signal may also include scheduling control, transmission format, resource allocation, uplink scheduling grant, power control, and uplink retrans
  • the interfering cell may have N (N is a positive integer). , usually a neighboring cell that may cause interference to the serving cell, where the value of i is 1 to N;
  • the first PDCCH signal sent by the base station of the i-th interfering cell may be transmitted to the first PDCCH signal of the terminal by using the first transport channel.
  • the base station of the interfering cell may also have multiple, the first original PDCCH signal, the first original pilot signal, the first original control signal, the first PDCCH signal, and the first transmission.
  • the sum of the N first PDCCH signals transmitted by the first original PDCCH signal sent by all the interfering cells to the terminal may be represented by the corresponding first transport channel, and n may represent white noise.
  • Equation 1 when the number of antennas when the base station of the serving cell transmits the second original PDCCH signal is 1, x 0 represents a vector signal; when the base station of the serving cell transmits the second original PDCCH signal, the number of antennas is greater than 1, x 0 represents a vector signal matrix; likewise, when the number of antennas when the base station of the interfering cell transmits the first original PDCCH signal is 1, x i represents a vector signal; when the base station of the interfering cell transmits an antenna of the first original PDCCH signal When the number is greater than 1, x i represents a vector signal matrix.
  • the location of the resource unit of the second original pilot signal corresponds to the ID of the serving cell, and the location is usually fixed, for example, the resource unit filled in the vertical line in FIG. 3; the first original pilot
  • the location of the resource unit of the signal corresponds to the ID of the serving cell, which is also typically fixed, such as the resource unit filled with the horizontal lines in FIG.
  • the PDCCH signal can be demodulated by using an algorithm such as MMSE, SLIC, ML, etc., which can effectively reduce the same-frequency interference, thereby improving the demodulation performance of the PDCCH signal.
  • the demodulation process of the PDCCH signal is mainly a process of obtaining the second original PDCCH signal x 0 from the PDCCH signal y received in Equation 1. It can be known from Equation 1 that when the second channel matrix is obtained And first channel matrix At time, the second original PDCCH signal x 0 can be obtained by demodulation from y.
  • the expression demodulated by the MMSE algorithm can be expressed as Equation 2:
  • x 0 represents a second original PDCCH signal in the resource unit obtained by demodulation, Representing the second channel matrix, Express Conjugate transposed matrix, Representing the first channel matrix, Express Conjugate transposed matrix, ⁇ 2 represents the bottom noise power, I represents the identity matrix, and y represents the PDCCH signal in the resource unit received by the terminal, Express The inverse matrix.
  • x 0 in the resource unit may represent the second original pilot signal in the second original PDCCH signal or may represent the second original control signal in the second original PDCCH signal, wherein the second original pilot signal is known Therefore, the second original pilot signal does not need to be obtained by demodulation, and x 0 obtained by demodulation may be the second original control signal.
  • the signal of the interfering cell received by the terminal is an interference signal obtained by the terminal demodulating and obtaining the second original PDCCH signal.
  • the base station is configured to send the second power ratio limiting set and the first power ratio limiting set to the terminal, so that the terminal can limit the set and the first power ratio according to the second power ratio.
  • Limiting the set estimating a ratio ⁇ 0 of the power of the second original control signal to the power of the second original pilot signal and a ratio ⁇ i of the power of the first original control signal to the power of the first original pilot signal, thereby obtaining and Therefore, the PDCCH signal y in the resource unit is demodulated by an algorithm such as MMSE, SLIC, ML, etc., which can effectively reduce co-channel interference, to improve the demodulation performance of the PDCCH signal.
  • an algorithm such as MMSE, SLIC, ML, etc.
  • the ratio of the power of the first original control signal sent by the base station of the interfering cell to the power of the first original pilot signal is arbitrarily valued, and the second original control sent by the base station of the serving cell
  • the ratio of the power of the signal to the power of the second original pilot signal can also be arbitrarily selected, so that the terminal obtains the complexity of the first power ratio and the second power ratio by autonomous estimation from any possible values, and The accuracy is also difficult to guarantee, so that it is difficult to obtain the first channel matrix and the second channel matrix, and thus it is difficult to demodulate the PDCCH signal by an algorithm such as MMSE, SLIC, ML, etc., which can effectively reduce co-channel interference.
  • the implementation process of demodulating a PDCCH signal in any resource unit by using the method provided by the embodiment of the present invention can be referred to the description in the following embodiments.
  • the embodiment of the present invention provides a signal sending method.
  • the main steps of the method may include:
  • the base station of the serving cell acquires a first power ratio limit set preset by the at least one interfering cell base station, where the element in the first power ratio limit set is a preset ratio of the first power ratio, and the first power ratio is a base station of the interfering cell.
  • the base station of the interfering cell may limit the ratio of the power of the first original control signal and the power of the first original pilot signal in the first original PDCCH signal sent by the base station of the interfering cell to the preset first power ratio limit set.
  • the first power ratio is in the set of elements of the limit.
  • the number of elements in the first power ratio limit set is usually small, for example, it may be three, four, etc., and may be set as needed.
  • the first power ratio limit set corresponds to the ID of the interfering cell, and any one of the interfering cells corresponds to a first power ratio limit set, and the first power ratio limit set corresponding to the IDs of different interfering cells (ie, different interfering cells) may be the same. different.
  • the network architecture shown in FIG. 2 is taken as an example. If cell 1 is a serving cell, base station 1 is a base station of a serving cell, and base station 1 is also a base station of interfering cell 2, and base station 2 and base station 3 are interfering cells. Base station.
  • the base station 1 can obtain, by using the interface 2, the preset first power ratio limitation set corresponding to the interfering cell 3 and the interfering cell 4, respectively, and the base station 1 can also obtain the preset interfering cell from the base station 3 through the interface 2.
  • the corresponding first power ratio limit set is obtained by the base station 1 , and the first power ratio limit set corresponding to the preset interference cell 2 is directly obtained from the memory of the base station 1 . Therefore, when there are multiple interfering cells, the first power ratio limit set is also multiple and respectively corresponding to the interfering cells.
  • the power ratio of the first original control signal and the first original pilot signal sent by the base station of the interfering cell can be arbitrarily selected, and the terminal does not know the first original set by the base station of the interfering cell.
  • the terminal may be caused to be based on the first power by setting a first power ratio to limit a limited number of elements in the set.
  • the second power ratio limit set may be ⁇ -6 dB, -3 dB, 0 dB ⁇ .
  • the base station of the serving cell sends a preset second power ratio limit set and a first power ratio limit set to the terminal, where the element in the second power ratio limit set is a preset ratio of the second power ratio, and the second power ratio The ratio of the power of the second original control signal to the power of the second original pilot signal in the second original PDCCH signal transmitted by the base station of the serving cell.
  • the base station of the serving cell may also limit the ratio of the power of the second original control signal and the power of the second original pilot signal in the second original PDCCH signal sent by the base station of the serving cell by using a preset second power ratio limit set.
  • the number of elements in the second power ratio limiting set is also usually less, and may be set as needed, thereby reducing the terminal estimation according to the elements in the second power ratio set.
  • the complexity of the two power ratios improves the accuracy of the estimation.
  • the first power ratio limit set corresponding to the restricted set and the different interfering cells of the serving cell may be the same or different.
  • the terminal needs to estimate according to the second power ratio limit set corresponding to the serving cell and the first power ratio limit set corresponding to all the interfering cells, thereby obtaining the first power ratio and the second power ratio, and thus the base station of the serving cell is acquiring.
  • the first power ratio limit set and the second power ratio limit set preset by the base station of the serving cell may be sent to the terminal, so that the terminal can receive according to the The first power ratio limit set and the second power ratio limit set estimate are obtained to obtain a second power ratio and a first power ratio.
  • the sending, by the base station of the serving cell, the preset second power ratio limiting set and the first power ratio limiting set to the terminal may include: the base station of the serving cell adopts a preset second power ratio limiting set and the first power ratio The restricted set is sent to the terminal through high layer signaling.
  • the high-level signaling is a signaling message sent by the base station of the serving cell to the terminal, and the interval period is long, and is mainly used for sending parameter information that does not need to be changed for a long time, such as radio resource control (RRC resource control, RRC). Signaling or signaling at the protocol layer above other physical layers.
  • RRC resource control RRC resource control
  • Field 1 a second power ratio limit set of the serving cell
  • Field 2 List of IDs of interfering cells
  • Field 3 the first power ratio limit set corresponding to the ID of the interfering cell
  • the first power ratio limit set and the second power ratio limit set may be fixed for a long time after being set, and thus may be sent by using high-level signaling with a long interval period, thereby reducing network resources. s expenses.
  • the first power ratio limit set and the second power ratio limit set may also be sent by physical signaling, which may result in a large network resource overhead due to a short interval period of sending physical signaling, resulting in no The necessary resources are wasted.
  • the base station of the serving cell sends the second original PDCCH signal to the terminal, and the current ratio of the second power ratio of the second original PDCCH signal is an element selected from the second power ratio limiting set.
  • the original PDCCH signal sent by the base station of the serving cell to the terminal may be the second original PDCCH signal, and the base station of the serving cell may send the second original PDCCH signal to the terminal by using multiple resource units.
  • the sending, by the base station of the serving cell, the second original PDCCH signal to the terminal may include:
  • the base station of the serving cell divides the multiple resource units corresponding to the second original PDCCH signal corresponding to the terminal into one resource unit group.
  • the base station of the serving cell selects an element for the resource unit group from the second power ratio restriction set according to a preset rule.
  • the base station of the serving cell configures, according to the selected element, a second power ratio of the second original PDCCH signal in the resource unit group to the current ratio, and sends the second original PDCCH signal to the terminal by using the resource unit group.
  • the base station of the serving cell may identify the area corresponding to the resource unit of the second original PDCCH signal, and divide the resource unit of the second original PDCCH signal corresponding to the terminal in the area into the same resource unit group, and then according to the preset rule. From the preset second power ratio limit set to the resource list The tuple selects an appropriate element and sends a second original PDCCH signal to the terminal corresponding to the resource unit group such that the current ratio of the power of the second original control signal and the power of the second original pilot signal in the second original PDCCH signal is The selected element.
  • the preset rule herein may be: if the signal of the current terminal is weak, the element with a larger value of the current terminal may be selected from the second power ratio limitation set; if the signal of the current terminal is strong, An element having a smaller selected value for the current terminal from the second power ratio limit set may be used.
  • the second original PDCCH signal sent by the base station of the serving cell to the terminal includes the second original pilot signal and the second original control signal, and the multiple resource units included in the resource unit group corresponding to the terminal, see above.
  • each resource unit corresponds to a second original pilot signal in the second original PDCCH signal or a second original control signal in the second original PDCCH signal.
  • the set of resource units corresponding to the second original pilot signal in the resource unit group is the first resource unit set
  • the set of resource units corresponding to the second original control signal is the second resource unit set
  • the second power ratio is limited.
  • the selected element in the set is the ratio of the power of the second original control signal corresponding to the second resource unit set to the power of the second original pilot signal corresponding to the first resource unit set.
  • the PDCCH signal in the resource unit received by the terminal includes the first original PDCCH transmitted by the base station of the interfering cell, in addition to the second PDCCH signal transmitted by the base station of the serving cell to the second PDCCH signal transmitted by the second transmission channel to the terminal.
  • the signal is transmitted to the first PDCCH signal of the terminal by using the first transmission channel. For details, refer to the description of Equation 1 above.
  • the terminal may obtain the first power ratio and the second according to the first power ratio limiting set and the second power ratio limiting set estimation.
  • the power ratio is obtained, thereby obtaining the first channel matrix and the second channel matrix, and then demodulating the PDCCH signal in the resource unit by using an algorithm such as MMSE, SLIC, ML, etc., to obtain a second original PDCCH signal, thereby effectively reducing co-channel interference and improving Demodulation performance of the PDCCH signal.
  • the PDCCH signal y in the resource unit includes the signal after the second original PDCCH signal sent by the base station of the serving cell is transmitted to the terminal through the second transmission channel, as shown in Equation 1. And further comprising: transmitting, by the base station of the interfering cell, a signal that is transmitted by the first original PDCCH signal to the terminal after the first transmission channel It can be known from Equation 1 that when the terminal obtains the second channel matrix And first channel matrix Then, the PDCCH signal in the resource unit may be demodulated by using an algorithm such as MMSE, SLIC, ML, etc., to obtain a second original PDCCH signal.
  • an algorithm such as MMSE, SLIC, ML, etc.
  • step 102 may also send the second original PDCCH signal to the terminal first, and then the second power is limited.
  • the system and the first power ratio limit set are sent to the terminal, which is not limited in the embodiment of the present invention.
  • the embodiment of the present invention provides a signal sending method, in which a base station of a serving cell obtains a first power ratio limit set preset by at least one interfering cell, and sets the first power ratio limit set to a second preset by the base station of the serving cell.
  • the power ratio limiting set is sent to the terminal, and the ratio of the power of the second original control signal and the power of the second original pilot signal sent to the terminal is configured according to the preset power ratio in the second power ratio limiting set, so that the terminal can Obtaining the first power ratio and the second power ratio according to the first power ratio limiting set and the second power ratio limiting set estimation, thereby obtaining the first channel matrix and the second channel matrix, and further reducing the same by using MMSE, SLIC, ML, etc.
  • the frequency interference algorithm demodulates the PDCCH signal in the resource unit to obtain the second original PDCCH signal, so that the demodulation performance of the PDCCH signal can be improved, thereby being able to solve the problem that the demodulation performance of the PDCCH signal is poor and the PDSCH signal in the prior art.
  • another embodiment of the present invention provides a signal demodulation method, and the main steps thereof may include:
  • the terminal receives a first power ratio limit set preset by the base station of the at least one interfering cell sent by the base station of the serving cell, and a second power ratio limit set preset by the base station of the serving cell, where the element in the first power ratio limit set is a preset ratio of the first power ratio, where the power of the first original control signal and the first original pilot signal in the first original physical downlink control channel PDCCH signal sent by the base station of the interfering cell through the first transmission channel a ratio of the power, the second power ratio is a preset ratio of the second power ratio, and the second power ratio is a second original control signal of the second original PDCCH signal sent by the base station of the serving cell through the second transmission channel.
  • the ratio of the power to the power of the second original pilot signal is a preset ratio of the first power ratio
  • the terminal here may be a user equipment in a serving cell such as a mobile phone, an iPad, or a personal digital assistant.
  • the interfering cell is usually a neighboring cell of the serving cell, and the interfering cell may be N, and N is a positive integer.
  • the first power ratio limit set and the second power ratio limit set refer to step 101 and step 102 in the foregoing embodiment.
  • the terminal may receive the first power ratio limiting set and the second power ratio limiting set from the base station of the serving cell, so as to obtain the first power according to the element estimates in the first power ratio limiting set and the second power ratio limiting set. Comparing with the second power ratio, the first channel matrix and the second channel matrix are obtained.
  • the first power ratio limiting set preset by the base station of the at least one interfering cell and the second power ratio limiting set preset by the base station of the serving cell that the terminal receives the base station of the serving cell may include: The terminal receives the high layer signaling sent by the base station of the serving cell, and the high layer signaling carries the first power ratio limiting set and the second power ratio limiting set. Transmitting the first power ratio limit set and the second power ratio limit by using higher layer signaling with a longer interval period than transmitting the first power ratio limit set and the second power ratio limit set by physical layer signaling with a shorter interval period Collections can reduce the overhead of network resources.
  • For the process of transmitting the second power ratio limit set and the first power ratio limit set by the high layer signaling refer to the description of step 102 in the foregoing embodiment, and details are not described herein again.
  • the terminal receives the PDCCH signal, where the PDCCH signal includes a second PDCCH signal that is sent by the second original PDCCH signal sent by the base station of the serving cell to the terminal, and the first original PDCCH signal sent by the base station of the interfering cell passes the first The first PDCCH signal transmitted by the transmission channel to the terminal.
  • the PDCCH signal received by the terminal may include multiple resource units, and the PDCCH signal in any resource unit may include a second PDCCH signal transmitted by the second original PDCCH signal sent by the base station of the serving cell to the terminal through the second transmission channel, and the interference
  • the first PDCCH signal transmitted by the base station of the cell is transmitted to the first PDCCH signal of the terminal by using the first transmission channel, and the white noise.
  • the current ratio of the second power ratio of the second original PDCCH signal is an element in the second power ratio limiting set selected by the base station of the serving cell according to a preset rule
  • the current ratio of the first power ratio of the first original PDCCH signal is The first power ratio selected by the base station of the interfering cell according to the preset rule limits the elements in the set.
  • the terminal demodulates the PDCCH signal according to the first power ratio limiting set and the second power ratio limiting set, to obtain a second original PDCCH signal.
  • step 303 may specifically include the following steps:
  • the terminal obtains a first power ratio and a second power ratio according to a preset estimation algorithm, a first power ratio limiting set, and a second power ratio limiting set.
  • the second original guide In the case where the frequency signal and the location of the resource unit of the second original pilot signal are known, based on the conventional channel estimation method, a second channel estimation matrix can be obtained, and the second channel estimation matrix corresponds to the second transmission channel corresponding to the resource unit. Transmission characteristics, the second channel corresponding to different resource units The second channel estimation matrix is different.
  • a first channel estimation matrix can be obtained, where the first channel estimation matrix is The first transmission channel resource unit corresponds to a transmission characteristic, and the first channel estimation matrix of the first transmission channel corresponding to different resource units is different. It should be noted that when there are N interfering cells, the first channel estimation matrix corresponding to the interfering cell is also N.
  • the terminal may estimate the first power ratio and the second power ratio by using a preset estimation algorithm, which is also called a blind estimation process.
  • the preset estimation algorithm adopted by the terminal may include a generalized maximum likelihood algorithm or a minimum energy algorithm.
  • Equation 3 the generalized maximum likelihood algorithm expression
  • the generalized maximum likelihood algorithm finds the likelihood value by traversing all possible combinations of power ratios of ⁇ 0 , ⁇ i ⁇ The smallest combination of ⁇ 0 , ⁇ i ⁇ .
  • ⁇ 0 is taken from the second power ratio limit set
  • ⁇ i is taken from the first power ratio limit set of the i-th interfering cell
  • the first power ratio limit set also corresponds to N.
  • the value range of j is a positive integer in the interval [1, M]
  • M is the number of resource units other than the resource elements of the second pilot signal and the first pilot signal in the resource unit of the PDCCH signal.
  • ⁇ 2 represents the bottom noise power
  • I represents the identity matrix
  • y represents the PDCCH signal in the resource unit received by the terminal
  • y H represents the conjugate matrix of y.
  • the minimum value so that the likelihood of ⁇ 0, ⁇ i ⁇ ⁇ 0 represents a combination of the second power ratio
  • a first power ratio [rho] i represents the i th interference corresponding to the cells.
  • Equation 4 the expression of the minimum energy algorithm can be expressed as Equation 4:
  • the minimum energy algorithm is found by traversing all possible combinations of ⁇ 0 , ⁇ i ⁇ power ratios.
  • the energy-less ⁇ 0 , ⁇ i ⁇ power ratios are combined to obtain a second power ratio ⁇ 0 and a first power ratio ⁇ i in the power ratio combination.
  • Equation 4 Express Find the modulus, L represents the number of summation samples, and the meanings of the other parameter symbols are consistent with Equation 3.
  • the terminal may perform the blind estimation process by using other preset estimation algorithms, so as to obtain the second power ratio corresponding to the serving cell and the first power ratio corresponding to the interfering cell, which is not limited in the embodiment of the present invention.
  • the terminal obtains a first channel matrix of the first transport channel and a second channel matrix of the second transport channel according to the first power ratio and the second power ratio.
  • the terminal may multiply the first channel estimation matrix by the first power ratio to obtain a first channel matrix, that is, a transmission characteristic of the first original pilot signal in the first transmission channel pair resource unit.
  • the expression of the first channel matrix can be expressed as Equation 5:
  • Representing the first channel matrix Representing a first channel estimation matrix
  • ⁇ i represents a first power ratio.
  • the first channel matrix corresponding to the interfering cell is also N.
  • the terminal may multiply the second channel estimation matrix by the second power ratio to obtain a second channel matrix, that is, the second transmission channel transmits the second original control signal in the resource unit. characteristic.
  • the expression of the second channel matrix can be expressed as Equation 6:
  • Representing the second channel matrix Representing a second channel estimation matrix
  • ⁇ 0 represents a second power ratio
  • the terminal demodulates the PDCCH signal by using a preset demodulation algorithm according to the first channel matrix and the second channel matrix, to obtain a second original PDCCH signal.
  • the terminal can demodulate the received PDCCH signal to obtain a second original PDCCH signal.
  • the terminal may demodulate the PDCCH signal in the received resource unit by using a demodulation algorithm capable of effectively reducing co-channel interference, thereby improving demodulation performance of the PDCCH signal.
  • the preset demodulation algorithm includes an MMSE algorithm, a SLIC algorithm, and an ML algorithm.
  • the expression of the MMSE algorithm can be found in Equation 2.
  • the MMSE, SLIC, and ML algorithms are prior art and will not be described in detail herein.
  • the terminal may also adopt other demodulation algorithms capable of effectively reducing co-channel interference, which is an embodiment of the present invention. Not limited.
  • the second original pilot signal in the second original PDCCH signal is a previously agreed known signal, and is not required to be obtained by demodulation.
  • the specificity obtained by the above demodulation method may be the second in the second original PDCCH signal.
  • Original control signal may be the second in the second original PDCCH signal.
  • the algorithm such as MRC or IRC is used to demodulate the PDCCH
  • the algorithms such as MMSE, SLIC, and ML can effectively reduce the same-frequency interference, thereby improving the demodulation performance of the PDCCH, and the demodulation performance of the PDCCH and the PDSCH.
  • the demodulation performance is matched to improve user throughput.
  • the embodiment of the present invention provides a signal demodulation method.
  • the terminal can receive the first power ratio limit set of the serving cell and the second power ratio limit set of the interfering cell, so that the first power ratio limit set and the second power ratio can be determined according to the first power ratio. Limiting the set estimation to obtain the first power ratio and the second power ratio, thereby obtaining the first channel matrix and the second channel matrix, so that the MMSE, the SLIC, the ML, etc. can be effectively reduced according to the first channel matrix and the second channel matrix.
  • the demodulation algorithm of the frequency interference demodulates the PDCCH signal to obtain the second original PDCCH signal, thereby improving the demodulation performance of the PDCCH signal, and thus solving the solution of the PDSCH signal due to poor demodulation performance of the PDCCH signal in the prior art.
  • the base station 800 can include:
  • the obtaining unit 801 may be configured to obtain a preset first power ratio limit set of the at least one interfering cell base station 800, where the element in the first power ratio limit set is a preset ratio of the first power ratio, where the first power ratio is an interfering cell
  • the sending unit 802 is configured to send the preset second power ratio limit set and the first power ratio limit set to the terminal, where the element in the second power ratio limit set is a preset ratio of the second power ratio, and the second power Ratio of the power of the second original control signal to the power of the second original pilot signal in the second original PDCCH signal sent by the base station 800 of the serving cell;
  • the sending unit 802 is further configured to send the second original PDCCH signal to the terminal, where a current ratio of the second power ratio of the second original PDCCH signal is an element selected from the second power ratio limit set.
  • the base station 800 here is a base station of a serving cell.
  • the sending unit 802 can be specifically configured to:
  • the preset second power ratio limiting set and the first power ratio limiting set are sent to the terminal by using high layer signaling.
  • the sending unit 802 is further specifically configured to:
  • the embodiment of the present invention provides a base station 800, which acquires a first power ratio limit set preset by at least one interfering cell, and sets the first power ratio limit set and a second power ratio limit set preset by the base station 800 of the serving cell.
  • the PDCCH signal in the resource unit is demodulated to obtain a second original PDCCH signal, so that demodulation performance of the PDCCH signal can be improved. Therefore, it is possible to solve the problem in the prior art that the user throughput is low due to the poor demodulation performance of the PDCCH signal and the demodulation performance of the PDSCH signal.
  • the terminal 900 may include:
  • the receiving unit 901 is configured to receive a first power ratio limiting set preset by the base station of the at least one interfering cell sent by the base station of the serving cell, and a second power ratio limiting set preset by the base station of the serving cell, the first power ratio limiting set
  • the element in the first power ratio is a preset ratio of the first power ratio
  • the first power ratio is the power of the first original control signal in the first original physical downlink control channel PDCCH signal sent by the base station of the interfering cell through the first transmission channel
  • the second power ratio is a preset ratio of the second power ratio of the element in the restricted set
  • the second power ratio is the second original PDCCH signal sent by the base station of the serving cell through the second transport channel.
  • the receiving unit 901 is further configured to receive a PDCCH signal, where the PDCCH signal includes a second PDCCH signal that is sent by the base station of the serving cell to the second PDCCH signal that is transmitted to the terminal by using the second transport channel, and the first original PDCCH that is sent by the base station of the interfering cell. Transmitting, by the first transmission channel, a first PDCCH signal to the terminal;
  • the processing unit 902 is configured to demodulate the PDCCH signal according to the first power ratio limiting set and the second power ratio limiting set, to obtain the second original PDCCH signal.
  • the terminal 900 herein may be a user equipment in a serving cell such as a mobile phone, an iPad, or a personal digital assistant.
  • the receiving unit 901 may be specifically configured to:
  • the high layer signaling carries a first power ratio limiting set and a second power ratio limiting set.
  • processing unit 902 can be specifically configured to:
  • the PDCCH signal is demodulated by using a preset demodulation algorithm according to the first channel matrix and the second channel matrix, thereby obtaining a second original PDCCH signal.
  • the preset estimation algorithm may include a generalized maximum likelihood algorithm or a minimum energy algorithm.
  • the embodiment of the present invention provides a terminal 900.
  • the terminal 900 receives the first power ratio limit set of the serving cell and the second power ratio limit set of the interfering cell, and thus may limit the set and the second power ratio according to the first power ratio. Limiting the set estimation to obtain the first power ratio and the second power ratio, thereby obtaining the first channel matrix and the second channel matrix, so that the MMSE, the SLIC, the ML, etc. can be effectively reduced according to the first channel matrix and the second channel matrix.
  • the frequency interference demodulation algorithm demodulates the PDCCH signal to obtain a second original PDCCH signal, thereby improving the demodulation performance of the PDCCH signal. Therefore, it is possible to solve the problem in the prior art that the user throughput is low due to the poor demodulation performance of the PDCCH signal and the demodulation performance of the PDSCH signal.
  • the base station 1000 can include a processor 1001, a transmitter 1002, a memory 1003, and a bus 1004.
  • the memory 1003 is configured to store instructions and data;
  • the bus 1004 is configured to connect to the processor 1001, the transmitter 1002, and the memory 1003; and the processor 1001 executes the instruction to obtain the first power ratio preset by the at least one interfering cell base station 1000.
  • the first power ratio is a preset ratio of the first power ratio of the first power downlink control channel PDCCH signal sent by the base station 1000 of the interfering cell to the first transmission channel. a ratio of the power of an original control signal to the power of the first original pilot signal;
  • the sending, by the transmitter 1002, the command may be used to send the preset second power ratio limit set and the first power ratio limit set to the terminal, where the second power ratio limit element is a second power ratio pre- a ratio, where the second power ratio is a ratio of a power of the second original control signal and a power of the second original pilot signal in the second original PDCCH signal sent by the base station 1000 of the serving cell;
  • the transmitting unit 1002 may further be configured to: send the second original PDCCH signal to the terminal, where a current ratio of the second power ratio of the second original PDCCH signal is an element in the second power ratio limiting set.
  • the base station 1000 here may be a base station of a serving cell.
  • the sending, by the transmitter 1002, the sending, by using the instruction, the preset second power ratio limiting set and the first power ratio limiting set to the terminal may include:
  • the preset second power ratio limiting set and the first power ratio limiting set are sent to the terminal by using high layer signaling.
  • the sending, by the transmitter 1002, the sending, by using the instruction, the second original PDCCH signal to the terminal may include:
  • the embodiment of the present invention provides a base station 1000, which acquires a first power ratio limit set preset by at least one interfering cell, and sets the first power ratio limit set and a second power ratio limit set preset by the base station 1000 of the serving cell.
  • the PDCCH signal in the resource unit is demodulated to obtain a second original PDCCH signal, so that demodulation performance of the PDCCH signal can be improved. Therefore, it is possible to solve the problem in the prior art that the user throughput is low due to the poor demodulation performance of the PDCCH signal and the demodulation performance of the PDSCH signal.
  • the terminal 1100 may include a processor 1101, a receiver 1102, a memory 1103, and a bus 1104.
  • the memory 1103 is used to store instructions and data; the bus 1104 is used to connect the processor 1101, the receiver 1102, and the storage.
  • the receiver 1102 is configured to receive a first power ratio limitation set preset by a base station of the at least one interfering cell sent by the base station of the serving cell, and a second power ratio limit set preset by the base station of the serving cell, where An element in a power ratio limiting set is a preset ratio of the first power ratio, where the first power ratio is the first original control signal in the first original physical downlink control channel PDCCH signal sent by the base station of the interfering cell through the first transmission channel.
  • the second power ratio is a preset ratio of the second power ratio of the element in the restricted set, and the second power ratio is the second sent by the base station of the serving cell through the second transmission channel a ratio of a power of the second original control signal to a power of the second original pilot signal in the original PDCCH signal;
  • the receiver 1102 may further be configured to receive a PDCCH signal, where the PDCCH signal includes a second PDCCH signal that is sent by the base station of the serving cell to the second PDCCH signal transmitted by the second transmission channel to the terminal, and a An original PDCCH signal is transmitted to the first PDCCH signal of the terminal through the first transmission channel;
  • the processor 1101 executing the instruction may be configured to demodulate the PDCCH signal according to the first power ratio limiting set and the second power ratio limiting set, thereby obtaining the second original PDCCH signal.
  • the terminal 1100 herein may be a user equipment in a serving cell such as a mobile phone, an iPad, or a personal digital assistant.
  • the receiver 1102 is configured to receive a first power ratio limit set preset by the base station of the at least one interfering cell sent by the base station of the serving cell, and a second power ratio limit set preset by the base station of the serving cell may include :
  • the high layer signaling carries a first power ratio limiting set and a second power ratio limiting set.
  • the processor 1101 is configured to perform demodulation on the received PDCCH signal according to the first power ratio limiting set and the second power ratio limiting set, so that obtaining the second original PDCCH signal may include:
  • the PDCCH signal is demodulated by using a preset demodulation algorithm according to the first channel matrix and the second channel matrix, thereby obtaining a second original PDCCH signal.
  • the preset estimation algorithm may include a generalized maximum likelihood algorithm or a minimum energy algorithm.
  • the embodiment of the present invention provides a terminal 1100.
  • the terminal 1100 receives the first power ratio limit set of the serving cell and the second power ratio limit set of the interfering cell, and thus may limit the set and the second power ratio according to the first power ratio. Limiting the set estimation to obtain the first power ratio and the second power ratio, thereby obtaining the first channel matrix and the second channel matrix, so that the MMSE, the SLIC, the ML, etc. can be effectively reduced according to the first channel matrix and the second channel matrix.
  • the frequency interference demodulation algorithm demodulates the PDCCH signal to obtain a second original PDCCH signal, thereby improving the demodulation performance of the PDCCH signal. Therefore, it is possible to solve the problem in the prior art that the user throughput is low due to the poor demodulation performance of the PDCCH signal and the demodulation performance of the PDSCH signal.
  • another embodiment of the present invention further provides a system 1200, including a base station configured as shown in FIG. 8 or FIG. 10 and a terminal configured as shown in FIG. 9 or FIG.
  • the disclosed apparatus, methods, and systems may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium.
  • the software functional units described above are stored in a storage medium and include instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform portions of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a disk or an optical disk, and the like.
  • ROM Read-Only Memory
  • RAM Random Access Memory

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Abstract

一种信号发送、解调方法以及设备和系统，涉及通信技术领域，能够解决现有技术中由于PDCCH信号的解调性能差从而与PDSCH信号的解调性能不匹配导致的用户吞吐量低的问题。具体方案为：服务小区的基站获取至少一个干扰小区基站预设的第一功率比限制集合，将预设的第二功率比限制集合及第一功率比限制集合发送给终端，并将第二原始PDCCH信号发送给终端，第二原始PDCCH信号的第二功率比的当前比值为从第二功率比限制集合中选取的元素。本发明实施例用于解调信号。

Description

一种信号发送、解调方法以及设备和系统
本申请要求于2015年7月20日提交中国专利局、申请号为201510428331.X、发明名称为“一种信号发送、解调方法以及设备和系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明实施例涉及通信技术领域，尤其涉及一种信号发送、解调方法以及设备和系统。
背景技术
在通信系统中，通信需求的持续增长推动着无线传输技术不断向前演进。目前，长期演进(Long Term Evolution，LTE)项目改进并增强了第3代合作伙伴计划的空中接入技术，能够改善小区边缘用户的性能，提高小区的容量。
在LTE系统，物理下行控制信道(Physical Downlink Control Channel，PDCCH)信号可以分为用于信道测量的导频信号、和控制信号，控制信号包括指示终端下行及上行空口资源具体位置的指示信息，物理下行共享信道(Physical Downlink Shared Channel，PDSCH)是主要承载用户终端数据的通道，终端在解调PDSCH信号之前，需要正确解调出PDCCH信号中基站发送的控制信号，而后根据控制信号中的指示信息获取PDSCH信号中与当前终端对应的数据信息。因此，PDCCH信号的解调性能的优劣决定了用户吞吐量的大小。
在LTE系统中，基站高密度及异构使得PDCCH信号和PDSCH信号受到的小区间或多终端间的同频干扰较为严重。为了降低同频干扰，终端通常采用能够有效降低同频干扰的联合最小均方误差(Minimum Mean Square Error,MMSE)算法、符号级干扰消除(Symbol Level Interference Cancellation,SLIC)、最大似然(Maximum Likelihood，ML)算法等解调PDSCH信号，因而PDSCH信号的解调性能较好，能够正确解调数据的效率较高。然而，对于PDCCH信号来说，终端通常采用抑制同频干扰能力较差的最大比合并(Maximum Ratio Combining，MRC)或干扰抑制合并(Interference Rejection Combining，IRC)法来解调PDCCH信号，因而 PDCCH信号的解调性能较差，终端能够正确解调PDCCH信号的效率较低。因此，虽然PDSCH信号的解调性能较好，但由于PDCCH信号的解调性能较差，与PDSCH信号的解调性能不匹配，从而降低了用户吞吐量。
发明内容
本发明实施例提供一种信号发送、解调方法以及设备和系统，能够解决现有技术中由于PDCCH信号的解调性能差从而与PDSCH信号的解调性能不匹配导致的用户吞吐量低的问题。
为达到上述目的，本发明的实施例采用如下技术方案：
第一方面，提供一种信号发送方法，所述方法包括：
服务小区的基站获取至少一个干扰小区基站预设的第一功率比限制集合，所述第一功率比限制集合中的元素为第一功率比的预设比值，所述第一功率比为所述干扰小区的基站通过第一传输信道发送的第一原始物理下行控制信道PDCCH信号中第一原始控制信号的功率与第一原始导频信号的功率的比值；
所述服务小区的基站将预设的第二功率比限制集合及所述第一功率比限制集合发送给所述终端，所述第二功率比限制集合中的元素为第二功率比的预设比值，所述第二功率比为所述服务小区的基站发送的第二原始PDCCH信号中第二原始控制信号的功率与第二原始导频信号的功率的比值；
所述服务小区的基站将所述第二原始PDCCH信号发送给所述终端，所述第二原始PDCCH信号的第二功率比的当前比值为从所述第二功率比限制集合中选取的元素。
结合第一方面，在第一方面的第一种可能的实现方式中，所述服务小区的基站将预设的第二功率比限制集合及所述第一功率比限制集合发送给所述终端包括：
所述服务小区的基站将预设的第二功率比限制集合及所述第一功率比限制集合通过高层信令发送给所述终端。
结合第一方面或第一方面的第一种可能的实现方式，在第一方面的第二种可能的实现方式中，所述服务小区的基站将所述第二原始PDCCH信 号发送给所述终端包括：
所述服务小区的基站将所述终端对应的第二原始PDCCH信号对应的多个资源单元划分为一个资源单元组；
所述服务小区的基站根据预设规则从所述第二功率比限制集合中为所述资源单元组选取一个元素；
所述服务小区的基站根据所述选取的元素配置所述资源单元组中第二原始PDCCH信号的第二功率比为所述当前比值，并将所述第二原始PDCCH信号通过所述资源单元组发送给所述终端。
第二方面，提供一种信号解调方法，所述方法包括：
终端接收服务小区的基站发送的至少一个干扰小区的基站预设的第一功率比限制集合及所述服务小区的基站预设的第二功率比限制集合，所述第一功率比限制集合中的元素为所述第一功率比的预设比值，所述第一功率比为干扰小区的基站通过第一传输信道发送的第一原始物理下行控制信道PDCCH信号中第一原始控制信号的功率与第一原始导频信号的功率的比值，所述第二功率比限制集合中的元素为第二功率比的预设比值，所述第二功率比为所述服务小区的基站通过第二传输信道发送的第二原始PDCCH信号中第二原始控制信号的功率与第二原始导频信号的功率的比值；
所述终端接收PDCCH信号，所述PDCCH信号包括所述服务小区的基站发送的所述第二原始PDCCH信号通过所述第二传输信道传输至所述终端的第二PDCCH信号，以及所述干扰小区的基站发送的所述第一原始PDCCH信号通过所述第一传输信道传输至所述终端的第一PDCCH信号；
所述终端根据所述第一功率比限制集合及所述第二功率比限制集合对所述PDCCH信号进行解调，从而获得所述第二原始PDCCH信号。
结合第二方面，在第二方面的第一种可能的实现方式中，所述终端接收服务小区的基站发送的至少一个干扰小区的基站预设的第一功率比限制集合及所述服务小区的基站预设的第二功率比限制集合包括：
所述终端接收所述服务小区的基站发送的高层信令，所述高层信令中携带有所述第一功率比限制集合及所述第二功率比限制集合。
结合第二方面或第二方面的第一种可能的实现方式，在第二方面的第 二种可能的实现方式中，所述终端根据所述第一功率比限制集合及所述第二功率比限制集合对所述PDCCH信号进行解调，从而获得所述第二原始PDCCH信号包括：
所述终端根据预设估计算法、所述第一功率比限制集合以及所述第二功率比限制集合获得所述第一功率比和所述第二功率比；
所述终端根据所述第一功率比和所述第二功率比获得所述第一传输信道的第一信道矩阵和所述第二传输信道的第二信道矩阵；
所述终端根据所述第一信道矩阵和所述第二信道矩阵，采用预设解调算法对所述PDCCH信号进行解调，从而获得所述第二原始PDCCH信号。
结合第二方面的第二种可能的实现方式，在第二方面的第三种可能的实现方式中，所述预设估计算法包括广义最大似然算法或最小能量算法。
第三方面，提供一种基站，包括：
获取单元，用于获取至少一个干扰小区基站预设的第一功率比限制集合，所述第一功率比限制集合中的元素为第一功率比的预设比值，所述第一功率比为所述干扰小区的基站通过第一传输信道发送的第一原始物理下行控制信道PDCCH信号中第一原始控制信号的功率与第一原始导频信号的功率的比值；
发送单元，用于将预设的第二功率比限制集合及所述第一功率比限制集合发送给所述终端，所述第二功率比限制集合中的元素为第二功率比的预设比值，所述第二功率比为所述服务小区的基站发送的第二原始PDCCH信号中第二原始控制信号的功率与第二原始导频信号的功率的比值；
所述发送单元还用于，将所述第二原始PDCCH信号发送给所述终端，所述第二原始PDCCH信号的第二功率比的当前比值为从所述第二功率比限制集合中选取的元素。
结合第三方面，在第三方面的第一种可能的实现方式中，所述发送单元具体用于：
将预设的第二功率比限制集合及所述第一功率比限制集合通过高层信令发送给所述终端。
结合第三方面或第三方面的第一种可能的实现方式，在第三方面的第二种可能的实现方式中，所述发送单元具体用于：
将所述终端对应的第二原始PDCCH信号对应的多个资源单元划分为一个资源单元组；
根据预设规则从所述第二功率比限制集合中为所述资源单元组选取一个元素；
根据所述选取的元素配置所述资源单元组中第二原始PDCCH信号的第二功率比为所述当前比值，并将所述第二原始PDCCH信号通过所述资源单元组发送给所述终端。
第四方面，提供一种终端，包括：
接收单元，用于接收服务小区的基站发送的至少一个干扰小区的基站预设的第一功率比限制集合及所述服务小区的基站预设的第二功率比限制集合，所述第一功率比限制集合中的元素为所述第一功率比的预设比值，所述第一功率比为干扰小区的基站通过第一传输信道发送的第一原始物理下行控制信道PDCCH信号中第一原始控制信号的功率与第一原始导频信号的功率的比值，所述第二功率比限制集合中的元素为第二功率比的预设比值，所述第二功率比为所述服务小区的基站通过第二传输信道发送的第二原始PDCCH信号中第二原始控制信号的功率与第二原始导频信号的功率的比值；
所述接收单元还用于接收PDCCH信号，所述PDCCH信号包括所述服务小区的基站发送的所述第二原始PDCCH信号通过所述第二传输信道传输至所述终端的第二PDCCH信号，以及所述干扰小区的基站发送的所述第一原始PDCCH信号通过所述第一传输信道传输至所述终端的第一PDCCH信号；
处理单元，用于根据所述第一功率比限制集合及所述第二功率比限制集合对所述PDCCH信号进行解调，从而获得所述第二原始PDCCH信号。
结合第四方面，在第四方面的第一种可能的实现方式中，所述接收单元具体用于：
接收所述服务小区的基站发送的高层信令，所述高层信令中携带有所述第一功率比限制集合及所述第二功率比限制集合。
结合第四方面或第四方面的第一种可能的实现方式，在第四方面的第二种可能的实现方式中，所述处理单元具体用于：
根据预设估计算法、所述第一功率比限制集合以及所述第二功率比限 制集合获得所述第一功率比和所述第二功率比；
根据所述第一功率比和所述第二功率比获得所述第一传输信道的第一信道矩阵和所述第二传输信道的第二信道矩阵；
根据所述第一信道矩阵和所述第二信道矩阵，采用预设解调算法对所述PDCCH信号进行解调，从而获得所述第二原始PDCCH信号。
结合第四方面的第二种可能的实现方式，在第四方面的第三种可能的实现方式中，所述预设估计算法包括广义最大似然算法或最小能量算法。
第五方面，提供一种系统，包括第三方面任一种实现方式所述的基站和第四方面任一种实现方式所述的终端。
本发明实施例提供一种信号发送、解调方法以及设备和系统，服务小区的基站通过获取至少一个干扰小区预设的第一功率比限制集合，并将该第一功率比限制集合与服务小区的基站预设的第二功率比限制集合发送给终端，而且根据第二功率比限制集合中预设的功率比值配置向终端发送的第二原始控制信号的功率和第二原始导频信号的功率的比值，以便于终端可以根据第一功率比限制集合和第二功率比限制集合估计获得第一功率比和第二功率比，从而获得第一信道矩阵和第二信道矩阵，进而采用MMSE、SLIC、ML等能够有效降低同频干扰的算法解调资源单元中的PDCCH信号以获得第二原始PDCCH信号，从而可以提高PDCCH信号的解调性能。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为LTE系统的基本网络架构示意图；
图2为另一种LTE系统网络架构示意图；
图3为本发明实施例提供的一种LTE系统中资源块的结构示意图；
图4为本发明实施例提供的一种方法流程示意图；
图5为本发明实施例提供的另一种方法流程示意图；
图6为本发明实施例提供的另一种方法流程示意图；
图7为本发明实施例提供的另一种方法流程示意图；
图8为本发明实施例提供的一种基站结构示意图；
图9为本发明实施例提供的一种终端结构示意图；
图10为本发明实施例提供的另一种基站结构示意图；
图11为本发明实施例提供的另一种终端结构示意图；
图12为本发明实施例提供的一种系统结构示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
LTE系统通常采用正交频分复用技术(Orthogonal Frequency Division Multiplexing，OFDM)和多输入多输出(Multiple-Input Multiple-Output，MIMO)技术作为无线网络演进的标准。LTE系统采用OFDM技术通过多个发射天线和多个接收天线进行信号传输的基本网络架构可以参见图1，其中，001可以为基站(或接入点等)，002-009可以为终端(或移动站、远程站、用户设备等)，基站001和终端002-009均可以包括1个或多个天线。其中的终端可以为手机、iPad、个人数字助手等用户设备。
一个物理基站管辖的小区可以是一个也可以是多个，不同基站间存在相互通信的接口(例如X2接口)。参见图2所示的LTE系统的网络架构示意图，当基站1管辖的小区1为服务小区时，同一基站管辖小区2可能为服务小区的干扰小区；不同基站管辖的小区也可能为服务小区的干扰小区，例如基站2管辖的小区3和小区4以及基站3管辖的小区5也可能为服务小区的干扰小区，小区与小区的身份标识码(Identification，ID)一一对应，小区的ID用以唯一标识一个小区。基站1与基站2之间存在接口1，基站1与基站3之间存在接口2，基站2与基站3之间存在接口3。
在LTE系统中，基站发送的原始PDCCH信号通过如图3所示的资源 块在物理传输信道中进行传输，其中，每个小方格代表一个资源单元，原始PDCCH信号以资源单元为单位进行划分。同一资源单元中可能包括多个基站发送的PDCCH信号。
终端接收到的PDCCH信号可以包括多个资源单元，其中，任一资源单元中信号的表达式可以表示为式1：
Figure PCTCN2016086760-appb-000001
其中，y可以表示接收到的PDCCH信号，x0可以表示服务小区的基站发送的第二原始PDCCH信号，具体可以是第二原始PDCCH信号中的第二原始导频信号或第二原始控制信号，第二原始控制信号具体可以包括调度控制、传输格式、资源分配、上行调度许可、功率控制以及上行重传等信息；
Figure PCTCN2016086760-appb-000002
可以表示服务小区的基站与终端之间的第二传输信道的第二信道矩阵，第二信道矩阵可以理解为第二传输信道对资源单元中第二原始控制信号的传输特性；
Figure PCTCN2016086760-appb-000003
可以表示第二原始PDCCH信号通过第二传输信道传输至终端的第二PDCCH信号；xi可以表示至少一个干扰小区中第i个干扰小区的基站发送的第一原始PDCCH信号中第一原始导频信号或第一原始控制信号，第一原始控制信号也可以包括调度控制、传输格式、资源分配、上行调度许可、功率控制以及上行重传等信息，干扰小区可以有N(N为正整数)个，通常为可能对服务小区造成干扰的邻近小区，i的取值为1到N；
Figure PCTCN2016086760-appb-000004
可以表示第i个干扰小区的基站与终端之间的第一传输信道的第一信道矩阵，第一信道矩阵可以理解为第一传输信道对资源单元中第一原始控制信号的传输特性；
Figure PCTCN2016086760-appb-000005
可以表示第i个干扰小区的基站发送的第一原始PDCCH信号通过第一传输信道传输至终端的第一PDCCH信号。需要强调的是，当干扰小区有多个时，干扰小区的基站也可以有多个，第一原始PDCCH信号、第一原始导频信号、第一原始控制信号、第一PDCCH信号、第一传输信道以及第一信道矩阵等也可以有多个且分别与不同的干扰小区相对应。
Figure PCTCN2016086760-appb-000006
可以表示所有干扰小区发送的第一原始PDCCH信号分别通过对应的第一传输信道传输至终端的N个第一PDCCH信号的和，n可以表示白噪声。
需要说明的是，在式1中，当服务小区的基站发送第二原始PDCCH信号时的天线数量为1时，x0表示矢量信号；当服务小区的基站发送第二原始PDCCH信号的天线数量大于1时，x0表示矢量信号矩阵；同样，当干扰小区的基站发送第一原始PDCCH信号时的天线数量为1时，xi表示矢 量信号；当干扰小区的基站发送第一原始PDCCH信号的天线数量大于1时，xi表示矢量信号矩阵。
另外，在资源块中，第二原始导频信号的资源单元的位置与服务小区的ID相对应，该位置通常是固定的，例如为图3中竖线填充的资源单元；第一原始导频信号的资源单元的位置与服务小区的ID相对应，该位置通常也是固定的，例如为图3中横线填充的资源单元。
由于当PDCCH信号的解调性能差时会影响用户吞吐量，因而可以采用MMSE、SLIC、ML等能够有效降低同频干扰的算法来解调PDCCH信号，从而提高PDCCH信号的解调性能。PDCCH信号的解调过程主要是从式1中接收到的PDCCH信号y中获得第二原始PDCCH信号x0的过程。由式1可知，当获得第二信道矩阵
Figure PCTCN2016086760-appb-000007
和第一信道矩阵
Figure PCTCN2016086760-appb-000008
时，可以从y中解调获得第二原始PDCCH信号x0。示例性的，通过MMSE算法进行解调的表达式可以表示为式2：
Figure PCTCN2016086760-appb-000009
其中，x0表示解调获得的资源单元中的第二原始PDCCH信号，
Figure PCTCN2016086760-appb-000010
表示第二信道矩阵，
Figure PCTCN2016086760-appb-000011
表示
Figure PCTCN2016086760-appb-000012
的共轭转置矩阵，
Figure PCTCN2016086760-appb-000013
表示第一信道矩阵，
Figure PCTCN2016086760-appb-000014
表示
Figure PCTCN2016086760-appb-000015
的共轭转置矩阵，σ2表示底噪声功率，I表示单位矩阵，y表示终端接收到的资源单元中的PDCCH信号，
Figure PCTCN2016086760-appb-000016
表示
Figure PCTCN2016086760-appb-000017
的逆矩阵。
由于资源单元中的x0可以表示第二原始PDCCH信号中的第二原始导频信号或者可以表示第二原始PDCCH信号中的第二原始控制信号，而其中的第二原始导频信号是已知的，因而第二原始导频信号不需要通过解调获得，通过解调获得的x0可以是第二原始控制信号。另外，由式1可知，终端接收到的干扰小区的信号是终端解调获得第二原始PDCCH信号的干扰信号。
本发明实施例提供的信号发送、解调方法中，基站主要通过向终端发送第二功率比限制集合和第一功率比限制集合，从而使得终端能够根据第二功率比限制集合和第一功率比限制集合，估计出第二原始控制信号的功率与第二原始导频信号的功率的比值ρ0及第一原始控制信号的功率与第一原始导频信号的功率的比值ρi，进而获得
Figure PCTCN2016086760-appb-000018
及
Figure PCTCN2016086760-appb-000019
从而对资源单元中的PDCCH信号y采用MMSE、SLIC、ML等能够有效降低同频干扰的算法进行解调，以提高PDCCH信号的解调性能。而在现有技术中，由于干扰小区的基站发送的第一原始控制信号 的功率与第一原始导频信号的功率的比值是可以任意取值的，且服务小区的基站发送的第二原始控制信号的功率与第二原始导频信号的功率的比值也是可以任意取值的，因而终端从任意可能的取值中通过自主估计获得第一功率比和第二功率比的复杂度很高，且准确度也很难保证，从而难以获得第一信道矩阵和第二信道矩阵，因而难以通过MMSE、SLIC、ML等能够有效降低同频干扰的算法对PDCCH信号进行解调。具体的，通过本发明实施实例提供的方法解调任一资源单元中PDCCH信号的实施过程，可以参见以下实施例中的描述。
本发明实施例提供一种信号发送方法，参见图4，该方法的主要步骤可以包括：
101、服务小区的基站获取至少一个干扰小区基站预设的第一功率比限制集合，第一功率比限制集合中的元素为第一功率比的预设比值，第一功率比为干扰小区的基站通过第一传输信道发送的第一原始物理下行控制信道PDCCH信号中第一原始控制信号的功率与第一原始导频信号的功率的比值。
干扰小区的基站可以通过预先设定的第一功率比限制集合，将干扰小区的基站发送的第一原始PDCCH信号中第一原始控制信号的功率与第一原始导频信号的功率的比值限定在第一功率比限制集合的元素中。第一功率比限制集合中的元素数量通常较少，例如可以是3个、4个等，具体可以根据需要进行设定。其中，第一功率比限制集合与干扰小区的ID对应，任一干扰小区对应一个第一功率比限制集合，不同干扰小区的ID(即不同干扰小区)对应的第一功率比限制集合可以相同可以不同。
示例性的，以图2所示的网络架构为例，若小区1为服务小区，则基站1为服务小区的基站，同时基站1也为干扰小区2的基站，基站2和基站3为干扰小区的基站。其中，基站1可以通过接口1从基站2获取预先设定的干扰小区3和干扰小区4分别对应的第一功率比限制集合；基站1还可以通过接口2从基站3获取预先设定的干扰小区5对应的第一功率比限制集合；基站1还可以从基站1的存储器中直接获取预先设定的干扰小区2对应的第一功率比限制集合。因而，当干扰小区为多个时，第一功率比限制集合也为多个且分别与干扰小区相对应。
现有技术中，干扰小区的基站发送的第一原始控制信号与第一原始导频信号的功率比是可以任意取值的，且终端并不知道干扰小区的基站设定的第一原 始控制信号的功率与第一原始导频信号的功率的比值。若需要获得该第一功率比，则终端需要从任意可能的取值中通过自主估计获得第一功率比，因而复杂度很高，且估计的准确度也很难保证。为了降低终端估计的复杂度，更加准确地获得第一功率比，在本发明实施例提供的方法中，通过预先设定第一功率比限制集合中有限数量的元素，可以使得终端根据第一功率比限制集合中有限的元素估计获得第一功率比时，能够降低估计过程的难度，提高估计的准确度。示例性的，第二功率比限制集合可以为{-6dB，-3dB，0dB}。
102、服务小区的基站将预设的第二功率比限制集合及第一功率比限制集合发送给终端，第二功率比限制集合中的元素为第二功率比的预设比值，第二功率比为服务小区的基站发送的第二原始PDCCH信号中第二原始控制信号的功率与第二原始导频信号的功率的比值。
服务小区的基站也可以通过预先设定的第二功率比限制集合，将服务小区的基站发送的第二原始PDCCH信号中第二原始控制信号的功率与第二原始导频信号的功率的比值限定在第二功率比限制集合中的元素中，第二功率比限制集合中的元素数量也通常较少，具体可以根据需要进行设定，从而可以降低终端根据第二功率比集合中的元素估计第二功率比的复杂度，提高估计的准确度。服务小区的第二功率比限制集合与不同干扰小区分别对应的第一功率比限制集合可以相同也可以不同。
事实上，终端需要根据服务小区对应的第二功率比限制集合及所有干扰小区对应的第一功率比限制集合进行估计，从而获得第一功率比和第二功率比，因而服务小区的基站在获取到所有干扰小区的基站预设的第一功率比限制集合之后，还可以将第一功率比限制集合和服务小区的基站预设的第二功率比限制集合发送给终端，以便于终端可以根据接收到的第一功率比限制集合和第二功率比限制集合估计获得第二功率比和第一功率比。
可选地，服务小区的基站将预设的第二功率比限制集合及第一功率比限制集合发送给终端可以包括：服务小区的基站将预设的第二功率比限制集合及第一功率比限制集合通过高层信令发送给终端。
其中，高层信令是服务小区的基站发送给终端的信令消息，其间隔周期较长，主要用于发送一些较长时间内不需要更改的参数信息，如无线资源控制(Radio Resource Control，RRC)信令或其他物理层之上的协议层的信令。示例 性的，通过高层信令发送第二功率比限制集合和第一功率比限制集合的格式可以如下：
{
字段1：服务小区的第二功率比限制集合；
字段2：干扰小区的ID列表；
字段3：干扰小区的ID分别对应的第一功率比限制集合
}
其中，由于第一功率比限制集合和第二功率比限制集合在设定好之后是可以长时间固定不变的，因而可以通过间隔周期较长的高层信令进行发送，从而可以减小网络资源的开销。在另一种情况下也可通过物理信令发送第一功率比限制集合和第二功率比限制集合，这种情况可能由于发送物理信令的间隔周期较短使得网络资源开销较大，造成不必要的资源浪费。
103、服务小区的基站将第二原始PDCCH信号发送给终端，第二原始PDCCH信号的第二功率比的当前比值为从第二功率比限制集合中选取的元素。
其中，服务小区的基站向终端发送的原始PDCCH信号可以为第二原始PDCCH信号，服务小区的基站可以通过多个资源单元向终端发送第二原始PDCCH信号。
可选地，参见图5，服务小区的基站将第二原始PDCCH信号发送给终端可以包括：
201、服务小区的基站将终端对应的第二原始PDCCH信号对应的多个资源单元划分为一个资源单元组。
202、服务小区的基站根据预设规则从第二功率比限制集合中为资源单元组选取一个元素。
203、服务小区的基站根据选取的元素配置资源单元组中第二原始PDCCH信号的第二功率比为所述当前比值，并将第二原始PDCCH信号通过资源单元组发送给终端。
具体的，服务小区的基站可以识别第二原始PDCCH信号的资源单元对应的区域，并将该区域中终端对应的第二原始PDCCH信号的资源单元划分为同一个资源单元组，而后根据预设规则从预先设定的第二功率比限制集合中为资源单 元组选取一个合适的元素，并向该资源单元组对应的终端发送第二原始PDCCH信号使得第二原始PDCCH信号中第二原始控制信号的功率和第二原始导频信号的功率的当前比值为选取的元素。示例性的，这里的预设规则可以是：若当前终端的信号较弱，则可以从第二功率比限制集合中为当前终端的选取数值较大的元素；若当前终端的信号较强，则可以从第二功率比限制集合中为当前终端的选取数值较小的元素。
需要说明的是，服务小区的基站向终端发送的第二原始PDCCH信号包括第二原始导频信号和第二原始控制信号，与终端对应的资源单元组包括的多个资源单元中，参见上文对式1的描述，每个资源单元对应第二原始PDCCH信号中的第二原始导频信号或者对应第二原始PDCCH信号中的第二原始控制信号。若该资源单元组中对应第二原始导频信号的资源单元的集合为第一资源单元集合，对应第二原始控制信号的资源单元的集合为第二资源单元集合，则从第二功率比限制集合中选取的元素，即为第二资源单元集合对应的第二原始控制信号的功率与第一资源单元集合对应的第二原始导频信号的功率的比值。
终端接收到的资源单元中的PDCCH信号除了包括服务小区的基站发送的第二原始PDCCH信号通过第二传输信道传输至终端的第二PDCCH信号以外，还包括干扰小区的基站发送的第一原始PDCCH信号通过第一传输信道传输至终端的第一PDCCH信号，具体可以参见上文对式1的描述。
终端在接收到在服务小区的基站发送的第一功率比限制集合及第二功率比限制集合后，可以根据第一功率比限制集合和第二功率比限制集合估计获得第一功率比和第二功率比，从而获得第一信道矩阵和第二信道矩阵，进而采用MMSE、SLIC、ML等算法解调资源单元中的PDCCH信号，以获得第二原始PDCCH信号，从而能够有效降低同频干扰，提高PDCCH信号的解调性能。
其中，如式1所示，资源单元中的PDCCH信号y包括服务小区的基站发送的第二原始PDCCH信号经过第二传输信道传输至终端后的信号
Figure PCTCN2016086760-appb-000020
还包括干扰小区的基站发送的第一原始PDCCH信号经过第一传输信道传输至终端后的信号
Figure PCTCN2016086760-appb-000021
由式1可知，当终端获得第二信道矩阵
Figure PCTCN2016086760-appb-000022
和第一信道矩阵
Figure PCTCN2016086760-appb-000023
后，可以采用MMSE、SLIC、ML等算法解调资源单元中的PDCCH信号，从而获得第二原始PDCCH信号。
另外，需要说明的是，步骤102与步骤103没有明确的先后关系，服务小区的基站也可以先将第二原始PDCCH信号发送给终端，而后再将第二功率比限 制集合及第一功率比限制集合发送给终端，本发明实施例不做限定。
本发明实施例提供一种信号发送方法，服务小区的基站通过获取至少一个干扰小区预设的第一功率比限制集合，并将该第一功率比限制集合与服务小区的基站预设的第二功率比限制集合发送给终端，而且根据第二功率比限制集合中预设的功率比值配置向终端发送的第二原始控制信号的功率和第二原始导频信号的功率的比值，以便于终端可以根据第一功率比限制集合和第二功率比限制集合估计获得第一功率比和第二功率比，从而获得第一信道矩阵和第二信道矩阵，进而采用MMSE、SLIC、ML等能够有效降低同频干扰的算法解调资源单元中的PDCCH信号以获得第二原始PDCCH信号，从而可以提高PDCCH信号的解调性能，因而能够解决现有技术中由于PDCCH信号的解调性能差从而与PDSCH信号的解调性能不匹配导致的用户吞吐量低的问题。
参见图6，本发明另一实施例提供一种信号解调方法，其主要步骤可以包括：
301、终端接收服务小区的基站发送的至少一个干扰小区的基站预设的第一功率比限制集合及服务小区的基站预设的第二功率比限制集合，第一功率比限制集合中的元素为第一功率比的预设比值，第一功率比为干扰小区的基站通过第一传输信道发送的第一原始物理下行控制信道PDCCH信号中第一原始控制信号的功率与第一原始导频信号的功率的比值，第二功率比限制集合中的元素为第二功率比的预设比值，第二功率比为服务小区的基站通过第二传输信道发送的第二原始PDCCH信号中第二原始控制信号的功率与第二原始导频信号的功率的比值。
其中，这里的终端可以是为手机、iPad、个人数字助手等服务小区内的用户设备，干扰小区通常为服务小区的邻近小区，干扰小区可以为N个，N为正整数。其中的第一功率比限制集合和第二功率比限制集合的具体描述可以参见上述实施例中的步骤101和步骤102。
在本步骤中，终端可以从服务小区的基站接收第一功率比限制集合及第二功率比限制集合，从而根据第一功率比限制集合和第二功率比限制集合中的元素估计获得第一功率比和第二功率比，进而获得第一信道矩阵和第二信道矩阵。
可选地，终端接收服务小区的基站发送的至少一个干扰小区的基站预设的第一功率比限制集合及服务小区的基站预设的第二功率比限制集合可以包括： 终端接收服务小区的基站发送的高层信令，高层信令中携带有第一功率比限制集合及第二功率比限制集合。与通过间隔周期较短的物理层信令发送第一功率比限制集合和第二功率比限制集合相比，通过间隔周期较长的高层信令发送第一功率比限制集合和第二功率比限制集合，可以减小网络资源的开销。通过高层信令发送第二功率比限制集合和第一功率比限制集合的过程具体可以参见上述实施例中步骤102的描述，这里不再赘述。
302、终端接收PDCCH信号，PDCCH信号包括服务小区的基站发送的第二原始PDCCH信号通过第二传输信道传输至终端的第二PDCCH信号，以及干扰小区的基站发送的第一原始PDCCH信号通过第一传输信道传输至终端的第一PDCCH信号。
终端接收到的PDCCH信号可以包括多个资源单元，任一资源单元中的PDCCH信号可以包括服务小区的基站发送的第二原始PDCCH信号通过第二传输信道传输至终端的第二PDCCH信号，和干扰小区的基站发送的第一原始PDCCH信号通过第一传输信道传输至终端的第一PDCCH信号，以及白噪声，任一资源单元中PDCCH信号的具体组成可以参见上文对式1的详细描述。其中，第二原始PDCCH信号的第二功率比的当前比值为服务小区的基站根据预设规则选取的第二功率比限制集合中的元素，第一原始PDCCH信号的第一功率比的当前比值为干扰小区的基站根据预设规则选取的第一功率比限制集合中的元素。
303、终端根据第一功率比限制集合及第二功率比限制集合对PDCCH信号进行解调，从而获得第二原始PDCCH信号。
具体的，在接收到第一功率比限制集合及第二功率比限制集合后，参见图7，步骤303具体可以包括以下步骤：
401、终端根据预设估计算法、第一功率比限制集合以及第二功率比限制集合获得第一功率比和第二功率比。
由于资源块中第二原始导频信号的资源单元的位置与服务小区的ID对应，又由于第二原始导频信号是服务小区的基站与终端事先约定的已知信号，因而在第二原始导频信号以及第二原始导频信号的资源单元的位置已知的情况下，基于传统的信道估计方法，可以得到第二信道估计矩阵，第二信道估计矩阵为第二传输信道与资源单元相对应的传输特性，不同资源单元对应的第二信道的 第二信道估计矩阵不同。
同样，在第一原始导频信号以及第一原始导频信号的资源单元的位置已知的情况下，基于传统的信道估计方法，可以得到第一信道估计矩阵，这里的第一信道估计矩阵为第一传输信道资源单元相对应的传输特性，不同资源单元对应的第一传输信道的第一信道估计矩阵不同。需要说明的是，当干扰小区为N个时，与干扰小区对应的第一信道估计矩阵也为N个。
在获得第一信道估计矩阵和第二信道估计矩阵之后，终端可以通过预设估计算法估计获得第一功率比和第二功率比，这一过程也叫做盲估计处理。可选地，终端采用的预设估计算法可以包括广义最大似然算法或最小能量算法。
示例性的，广义最大似然算法表达式可以表示为式3：
Figure PCTCN2016086760-appb-000024
广义最大似然算法是通过遍历所有可能的{ρ0,ρi}功率比组合，找到使得似然值
Figure PCTCN2016086760-appb-000025
最小的{ρ0,ρi}组合。在遍历所有可能的{ρ0,ρi}功率比组合时，ρ0从第二功率比限制集合中取值，ρi从第i个干扰小区的第一功率比限制集合中取值，当干扰小区为N个时，第一功率比限制集合也对应为N个。j的取值范围为[1,M]区间内的正整数，M为PDCCH信号的资源单元中除第二导频信号和第一导频信号的资源单元以外的资源单元的数量。
Figure PCTCN2016086760-appb-000026
表示第二信道估计矩阵，
Figure PCTCN2016086760-appb-000027
表示
Figure PCTCN2016086760-appb-000028
的共轭矩阵，
Figure PCTCN2016086760-appb-000029
表示第一信道估计矩阵，
Figure PCTCN2016086760-appb-000030
表示
Figure PCTCN2016086760-appb-000031
的共轭矩阵，
Figure PCTCN2016086760-appb-000032
表示
Figure PCTCN2016086760-appb-000033
的逆矩阵，σ2表示底噪声功率，I表示单位矩阵，y表示终端接收到的资源单元中的PDCCH信号，yH表示y的共轭矩阵。其中，使得似然值最小的{ρ0,ρi}组合中的ρ0表示第二功率比，ρi表示第i个干扰小区对应的第一功率比。
示例性的，最小能量算法的表达式可以表示为式4：
Figure PCTCN2016086760-appb-000034
其中，
Figure PCTCN2016086760-appb-000035
最小能量算法是通过遍历所有可能的{ρ0,ρi}功率比组合，找到使得
Figure PCTCN2016086760-appb-000036
的能量最小的{ρ0,ρi}功率比组合，从而获得 该功率比组合中的第二功率比ρ0和第一功率比ρi。式4中，
Figure PCTCN2016086760-appb-000037
表示对
Figure PCTCN2016086760-appb-000038
求模，L表示求和样点个数，其它各参数符号表示的意义与式3一致。
当然，终端也可以采用其它预设估计算法进行盲估计处理，从而获得服务小区对应的第二功率比和干扰小区对应的第一功率比，本发明实施例不做限定。
402、终端根据第一功率比和第二功率比获得第一传输信道的第一信道矩阵和第二传输信道的第二信道矩阵。
终端在获得第一功率比后，可以将第一信道估计矩阵与第一功率比相乘，从而获得第一信道矩阵，即第一传输信道对资源单元中第一原始导频信号的传输特性。第一信道矩阵的表达式可以表示为式5：
Figure PCTCN2016086760-appb-000039
其中，
Figure PCTCN2016086760-appb-000040
表示第一信道矩阵，
Figure PCTCN2016086760-appb-000041
表示第一信道估计矩阵，ρi表示第一功率比。当干扰小区为N个时，与干扰小区对应的第一信道矩阵也为N个。
同理，终端在获得第二功率比后，可以将第二信道估计矩阵与第二功率比相乘，从而获得第二信道矩阵，即第二传输信道对资源单元中第二原始控制信号的传输特性。第二信道矩阵的表达式可以表示为式6：
Figure PCTCN2016086760-appb-000042
其中，
Figure PCTCN2016086760-appb-000043
表示第二信道矩阵，
Figure PCTCN2016086760-appb-000044
表示第二信道估计矩阵，ρ0表示第二功率比。
403、终端根据第一信道矩阵和第二信道矩阵，采用预设解调算法对PDCCH信号进行解调，从而获得第二原始PDCCH信号。
由式1可知，在获得第一信道矩阵和第二信道矩阵后，终端可以对接收到的PDCCH信号进行解调，从而获得第二原始PDCCH信号。具体的，终端可以采用能够有效降低同频干扰的解调算法对接收到的资源单元中的PDCCH信号进行解调，从而提高PDCCH信号的解调性能。
可选地，预设解调算法包括MMSE算法、SLIC算法以及ML算法。示例性的，MMSE算法的表达式可以参见式2。MMSE、SLIC以及ML算法为现有技术，这里不再进行详细描述。当然，在获得第一信道矩阵和第二信道矩阵之后，终端还可以采用其它能够有效降低同频干扰的解调算法，本发明实施例 不做限定。
此外，第二原始PDCCH信号中的第二原始导频信号是事先约定的已知信号，不需要再通过解调获得，通过上述解调方法获得的具体可以是第二原始PDCCH信号中的第二原始控制信号。
与现有技术中采用MRC或IRC等算法解调PDCCH相比，由于MMSE、SLIC、ML等算法能够有效降低同频干扰，从而可以提高PDCCH的解调性能，使得PDCCH的解调性能与PDSCH的解调性能相匹配，从而能提高用户吞吐量。
本发明实施例提供一种信号解调方法，由于终端接收到了服务小区的第一功率比限制集合和干扰小区的第二功率比限制集合，因而可以根据第一功率比限制集合和第二功率比限制集合估计获得第一功率比和第二功率比，进而可以获得第一信道矩阵和第二信道矩阵，从而能够根据第一信道矩阵和第二信道矩阵采用MMSE、SLIC、ML等能够有效减低同频干扰的解调算法对PDCCH信号进行解调获得第二原始PDCCH信号，因而可以提高PDCCH信号的解调性能，因此能够解决现有技术中由于PDCCH信号的解调性能差从而与PDSCH信号的解调性能不匹配导致的用户吞吐量低的问题。
本发明另一实施例提供一种基站800，参见图8，基站800可以包括：
获取单元801，可以用于获取至少一个干扰小区基站800预设的第一功率比限制集合，第一功率比限制集合中的元素为第一功率比的预设比值，第一功率比为干扰小区的基站800通过第一传输信道发送的第一原始物理下行控制信道PDCCH信号中第一原始控制信号的功率与第一原始导频信号的功率的比值；
发送单元802，可以用于将预设的第二功率比限制集合及第一功率比限制集合发送给终端，第二功率比限制集合中的元素为第二功率比的预设比值，第二功率比为服务小区的基站800发送的第二原始PDCCH信号中第二原始控制信号的功率与第二原始导频信号的功率的比值；
发送单元802还可以用于，将第二原始PDCCH信号发送给终端，第二原始PDCCH信号的第二功率比的当前比值为从第二功率比限制集合中选取的元素。
其中，这里的基站800为服务小区的基站。
可选地，发送单元802可以具体用于：
将预设的第二功率比限制集合及第一功率比限制集合通过高层信令发送给终端。
可选地，发送单元802还可以具体用于：
将终端对应的第二原始PDCCH信号对应的多个资源单元划分为一个资源单元组；
根据预设规则从第二功率比限制集合中为资源单元组选取一个元素；
根据选取的元素配置资源单元组中第二原始PDCCH信号的第二功率比为所述当前比值，并将第二原始PDCCH信号通过资源单元组发送给终端。
本发明实施例提供一种基站800，通过获取至少一个干扰小区预设的第一功率比限制集合，并将该第一功率比限制集合与服务小区的基站800预设的第二功率比限制集合发送给终端，而且根据第二功率比限制集合中预设的功率比值配置向终端发送的第二原始控制信号的功率和第二原始导频信号的功率的比值，以便于终端可以根据第一功率比限制集合和第二功率比限制集合估计获得第一功率比和第二功率比，从而获得第一信道矩阵和第二信道矩阵，进而采用MMSE、SLIC、ML等能够有效降低同频干扰的算法解调资源单元中的PDCCH信号以获得第二原始PDCCH信号，从而可以提高PDCCH信号的解调性能。因而，能够解决现有技术中由于PDCCH信号的解调性能差从而与PDSCH信号的解调性能不匹配导致的用户吞吐量低的问题。
本发明另一实施例提供一种终端900，参见图9，终端900可以包括：
接收单元901，可以用于接收服务小区的基站发送的至少一个干扰小区的基站预设的第一功率比限制集合及服务小区的基站预设的第二功率比限制集合，第一功率比限制集合中的元素为第一功率比的预设比值，第一功率比为干扰小区的基站通过第一传输信道发送的第一原始物理下行控制信道PDCCH信号中第一原始控制信号的功率与第一原始导频信号的功率的比值，第二功率比限制集合中的元素为第二功率比的预设比值，第二功率比为服务小区的基站通过第二传输信道发送的第二原始PDCCH信号中第二原始控制信号的功率与第二原始导频信号的功率的比值；
接收单元901还可以用于接收PDCCH信号，PDCCH信号包括服务小区的基站发送的第二原始PDCCH信号通过第二传输信道传输至终端的第二PDCCH信号，以及干扰小区的基站发送的第一原始PDCCH信号通过第一传输信道传输至终端的第一PDCCH信号；
处理单元902，可以用于根据第一功率比限制集合及第二功率比限制集合对PDCCH信号进行解调，从而获得第二原始PDCCH信号。
其中，这里的终端900可以是为手机、iPad、个人数字助手等服务小区内的用户设备。
可选地，接收单元901可以具体用于：
接收服务小区的基站发送的高层信令，高层信令中携带有第一功率比限制集合及第二功率比限制集合。
可选地，处理单元902可以具体用于：
根据预设估计算法、第一功率比限制集合以及第二功率比限制集合获得第一功率比和第二功率比；
根据第一功率比和第二功率比获得第一传输信道的第一信道矩阵和第二传输信道的第二信道矩阵；
根据第一信道矩阵和第二信道矩阵，采用预设解调算法对PDCCH信号进行解调，从而获得第二原始PDCCH信号。
可选地，预设估计算法可以包括广义最大似然算法或最小能量算法。
本发明实施例提供一种终端900，由于该终端900接收到了服务小区的第一功率比限制集合和干扰小区的第二功率比限制集合，因而可以根据第一功率比限制集合和第二功率比限制集合估计获得第一功率比和第二功率比，进而可以获得第一信道矩阵和第二信道矩阵，从而能够根据第一信道矩阵和第二信道矩阵采用MMSE、SLIC、ML等能够有效减低同频干扰的解调算法对PDCCH信号进行解调获得第二原始PDCCH信号，因而可以提高PDCCH信号的解调性能。因此，能够解决现有技术中由于PDCCH信号的解调性能差从而与PDSCH信号的解调性能不匹配导致的用户吞吐量低的问题。
本发明另一实施例提供一种基站1000，参见图10，基站1000可以包括处理器1001、发送器1002、存储器1003和总线1004。其中，存储器1003用于存储指令和数据；总线1004用于连接处理器1001、发送器1002和存储器1003；处理器1001执行该指令可以用于获取至少一个干扰小区基站1000预设的第一功率比限制集合，第一功率比限制集合中的元素为第一功率比的预设比值，第一功率比为干扰小区的基站1000通过第一传输信道发送的第一原始物理下行控制信道PDCCH信号中第一原始控制信号的功率与第一原始导频信号的功率的比值；
发送器1002执行该指令可以用于，将预设的第二功率比限制集合及第一功率比限制集合发送给终端，第二功率比限制集合中的元素为第二功率比的预 设比值，第二功率比为服务小区的基站1000发送的第二原始PDCCH信号中第二原始控制信号的功率与第二原始导频信号的功率的比值；
发送器1002执行该指令还可以用于，将第二原始PDCCH信号发送给终端，第二原始PDCCH信号的第二功率比的当前比值为第二功率比限制集合中的元素。
其中，这里的基站1000可以为服务小区的基站。
可选地，发送器1002执行该指令用于将预设的第二功率比限制集合及第一功率比限制集合发送给终端可以包括：
将预设的第二功率比限制集合及第一功率比限制集合通过高层信令发送给终端。
可选地，发送器1002执行该指令用于将第二原始PDCCH信号发送给终端可以包括：
将终端对应的第二原始PDCCH信号对应的多个资源单元划分为一个资源单元组；
根据预设规则从第二功率比限制集合中为资源单元组选取一个元素；
根据选取的元素配置资源单元组中第二原始PDCCH信号的第二功率比为所述当前比值，并将第二原始PDCCH信号通过资源单元组发送给终端。
本发明实施例提供一种基站1000，通过获取至少一个干扰小区预设的第一功率比限制集合，并将该第一功率比限制集合与服务小区的基站1000预设的第二功率比限制集合发送给终端，而且根据第二功率比限制集合中预设的功率比值配置向终端发送的第二原始控制信号的功率和第二原始导频信号的功率的比值，以便于终端可以根据第一功率比限制集合和第二功率比限制集合估计获得第一功率比和第二功率比，从而获得第一信道矩阵和第二信道矩阵，进而采用MMSE、SLIC、ML等能够有效降低同频干扰的算法解调资源单元中的PDCCH信号以获得第二原始PDCCH信号，从而可以提高PDCCH信号的解调性能。因而，能够解决现有技术中由于PDCCH信号的解调性能差从而与PDSCH信号的解调性能不匹配导致的用户吞吐量低的问题。
本发明另一实施例提供一种终端1100，参见图11，终端1100可以包括处理器1101、接收器1102、存储器1103和总线1104。其中，存储器1103用于存储指令和数据；总线1104用于连接处理器1101、接收器1102和存 储器1103；接收器1102执行该指令用于接收服务小区的基站发送的至少一个干扰小区的基站预设的第一功率比限制集合及服务小区的基站预设的第二功率比限制集合，第一功率比限制集合中的元素为第一功率比的预设比值，第一功率比为干扰小区的基站通过第一传输信道发送的第一原始物理下行控制信道PDCCH信号中第一原始控制信号的功率与第一原始导频信号的功率的比值，第二功率比限制集合中的元素为第二功率比的预设比值，第二功率比为服务小区的基站通过第二传输信道发送的第二原始PDCCH信号中第二原始控制信号的功率与第二原始导频信号的功率的比值；
接收器1102执行该指令还可以用于接收PDCCH信号，PDCCH信号包括服务小区的基站发送的第二原始PDCCH信号通过第二传输信道传输至终端的第二PDCCH信号，以及干扰小区的基站发送的第一原始PDCCH信号通过第一传输信道传输至终端的第一PDCCH信号；
处理器1101执行该指令可以用于根据第一功率比限制集合及第二功率比限制集合对PDCCH信号进行解调，从而获得第二原始PDCCH信号。
其中，这里的终端1100可以是为手机、iPad、个人数字助手等服务小区内的用户设备。
可选地，接收器1102执行该指令用于接收服务小区的基站发送的至少一个干扰小区的基站预设的第一功率比限制集合及服务小区的基站预设的第二功率比限制集合可以包括：
接收服务小区的基站发送的高层信令，高层信令中携带有第一功率比限制集合及第二功率比限制集合。
可选地，处理器1101执行该指令用于根据第一功率比限制集合及第二功率比限制集合对接收到的PDCCH信号进行解调，从而获得第二原始PDCCH信号可以包括：
根据预设估计算法、第一功率比限制集合以及第二功率比限制集合获得第一功率比和第二功率比；
根据第一功率比和第二功率比获得第一传输信道的第一信道矩阵和第二传输信道的第二信道矩阵；
根据第一信道矩阵和第二信道矩阵，采用预设解调算法对PDCCH信号进行解调，从而获得第二原始PDCCH信号。
可选地，预设估计算法可以包括广义最大似然算法或最小能量算法。
本发明实施例提供一种终端1100，由于该终端1100接收到了服务小区的第一功率比限制集合和干扰小区的第二功率比限制集合，因而可以根据第一功率比限制集合和第二功率比限制集合估计获得第一功率比和第二功率比，进而可以获得第一信道矩阵和第二信道矩阵，从而能够根据第一信道矩阵和第二信道矩阵采用MMSE、SLIC、ML等能够有效减低同频干扰的解调算法对PDCCH信号进行解调获得第二原始PDCCH信号，因而可以提高PDCCH信号的解调性能。因此，能够解决现有技术中由于PDCCH信号的解调性能差从而与PDSCH信号的解调性能不匹配导致的用户吞吐量低的问题。
参见图12，本发明又一实施例还提供一种系统1200，包括如图8或图10所示结构的基站和如图9或图11所示结构的终端。
在本申请所提供的几个实施例中，应该理解到，所揭露的设备、方法和系统，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理包括，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用硬件加软件功能单元的形式实现。
上述以软件功能单元的形式实现的集成的单元，可以存储在一个计算机可读取存储介质中。上述软件功能单元存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例所述方法的部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，简称ROM)、随机存取存储器(Random Access Memory，简称RAM)、磁碟或者光盘等 各种可以存储程序代码的介质。
关于装置、系统或设备的一些具体功能可参照之前方法实施例的描述。
最后应说明的是：以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。

Claims (15)

  1. 一种信号发送方法，其特征在于，所述方法包括：
    服务小区的基站获取至少一个干扰小区基站预设的第一功率比限制集合，所述第一功率比限制集合中的元素为第一功率比的预设比值，所述第一功率比为所述干扰小区的基站通过第一传输信道发送的第一原始物理下行控制信道PDCCH信号中第一原始控制信号的功率与第一原始导频信号的功率的比值；
    所述服务小区的基站将预设的第二功率比限制集合及所述第一功率比限制集合发送给所述终端，所述第二功率比限制集合中的元素为第二功率比的预设比值，所述第二功率比为所述服务小区的基站发送的第二原始PDCCH信号中第二原始控制信号的功率与第二原始导频信号的功率的比值；
    所述服务小区的基站将所述第二原始PDCCH信号发送给所述终端，所述第二原始PDCCH信号的第二功率比的当前比值为从所述第二功率比限制集合中选取的元素。
  2. 根据权利要求1所述的方法，其特征在于，所述服务小区的基站将预设的第二功率比限制集合及所述第一功率比限制集合发送给所述终端包括：
    所述服务小区的基站将预设的第二功率比限制集合及所述第一功率比限制集合通过高层信令发送给所述终端。
  3. 根据权利要求1或2所述的方法，其特征在于，所述服务小区的基站将所述第二原始PDCCH信号发送给所述终端包括：
    所述服务小区的基站将所述终端对应的第二原始PDCCH信号对应的多个资源单元划分为一个资源单元组；
    所述服务小区的基站根据预设规则从所述第二功率比限制集合中为所述资源单元组选取一个元素；
    所述服务小区的基站根据所述选取的元素配置所述资源单元组中第二原始PDCCH信号的第二功率比的为所述当前比值，并将所述第二原始PDCCH信号通过所述资源单元组发送给所述终端。
  4. 一种信号解调方法，其特征在于，所述方法包括：
    终端接收服务小区的基站发送的至少一个干扰小区的基站预设的第一功率比限制集合及所述服务小区的基站预设的第二功率比限制集合，所述第一功 率比限制集合中的元素为所述第一功率比的预设比值，所述第一功率比为干扰小区的基站通过第一传输信道发送的第一原始物理下行控制信道PDCCH信号中第一原始控制信号的功率与第一原始导频信号的功率的比值，所述第二功率比限制集合中的元素为第二功率比的预设比值，所述第二功率比为所述服务小区的基站通过第二传输信道发送的第二原始PDCCH信号中第二原始控制信号的功率与第二原始导频信号的功率的比值；
    所述终端接收PDCCH信号，所述PDCCH信号包括所述服务小区的基站发送的所述第二原始PDCCH信号通过所述第二传输信道传输至所述终端的第二PDCCH信号，以及所述干扰小区的基站发送的所述第一原始PDCCH信号通过所述第一传输信道传输至所述终端的第一PDCCH信号；
    所述终端根据所述第一功率比限制集合及所述第二功率比限制集合对所述PDCCH信号进行解调，从而获得所述第二原始PDCCH信号。
  5. 根据权利要求4所述的方法，其特征在于，所述终端接收服务小区的基站发送的至少一个干扰小区的基站预设的第一功率比限制集合及所述服务小区的基站预设的第二功率比限制集合包括：
    所述终端接收所述服务小区的基站发送的高层信令，所述高层信令中携带有所述第一功率比限制集合及所述第二功率比限制集合。
  6. 根据权利要求4或5所述的方法，其特征在于，所述终端根据所述第一功率比限制集合及所述第二功率比限制集合对所述PDCCH信号进行解调，从而获得所述第二原始PDCCH信号包括：
    所述终端根据预设估计算法、所述第一功率比限制集合以及所述第二功率比限制集合获得所述第一功率比和所述第二功率比；
    所述终端根据所述第一功率比和所述第二功率比获得所述第一传输信道的第一信道矩阵和所述第二传输信道的第二信道矩阵；
    所述终端根据所述第一信道矩阵和所述第二信道矩阵，采用预设解调算法对所述PDCCH信号进行解调，从而获得所述第二原始PDCCH信号。
  7. 根据权利要求6所述的方法，其特征在于，所述预设估计算法包括广义最大似然算法或最小能量算法。
  8. 一种基站，其特征在于，包括：
    获取单元，用于获取至少一个干扰小区基站预设的第一功率比限制集合， 所述第一功率比限制集合中的元素为第一功率比的预设比值，所述第一功率比为所述干扰小区的基站通过第一传输信道发送的第一原始物理下行控制信道PDCCH信号中第一原始控制信号的功率与第一原始导频信号的功率的比值；
    发送单元，用于将预设的第二功率比限制集合及所述第一功率比限制集合发送给所述终端，所述第二功率比限制集合中的元素为第二功率比的预设比值，所述第二功率比为所述服务小区的基站发送的第二原始PDCCH信号中第二原始控制信号的功率与第二原始导频信号的功率的比值；
    所述发送单元还用于，将所述第二原始PDCCH信号发送给所述终端，所述第二原始PDCCH信号的第二功率比的当前比值为从所述第二功率比限制集合中选取的元素。
  9. 根据权利要求8所述的基站，其特征在于，所述发送单元具体用于：
    将预设的第二功率比限制集合及所述第一功率比限制集合通过高层信令发送给所述终端。
  10. 根据权利要求8或9所述的基站，其特征在于，所述发送单元具体用于：
    将所述终端对应的第二原始PDCCH信号对应的多个资源单元划分为一个资源单元组；
    根据预设规则从所述第二功率比限制集合中为所述资源单元组选取一个元素；
    根据所述选取的元素配置所述资源单元组中第二原始PDCCH信号的第二功率比为所述当前比值，并将所述第二原始PDCCH信号通过所述资源单元组发送给所述终端。
  11. 一种终端，其特征在于，包括：
    接收单元，用于接收服务小区的基站发送的至少一个干扰小区的基站预设的第一功率比限制集合及所述服务小区的基站预设的第二功率比限制集合，所述第一功率比限制集合中的元素为所述第一功率比的预设比值，所述第一功率比为干扰小区的基站通过第一传输信道发送的第一原始物理下行控制信道PDCCH信号中第一原始控制信号的功率与第一原始导频信号的功率的比值，所述第二功率比限制集合中的元素为第二功率比的预设比值，所述第二功率比为所述服务小区的基站通过第二传输信道发送的第二原始PDCCH信号中第二 原始控制信号的功率与第二原始导频信号的功率的比值；
    所述接收单元还用于接收PDCCH信号，所述PDCCH信号包括所述服务小区的基站发送的第二原始PDCCH信号通过所述第二传输信道传输至所述终端的第二PDCCH信号，以及所述干扰小区的基站发送的第一原始PDCCH信号通过所述第一传输信道传输至所述终端的第一PDCCH信号；
    处理单元，用于根据所述第一功率比限制集合及所述第二功率比限制集合对所述PDCCH信号进行解调，从而获得所述第二原始PDCCH信号。
  12. 根据权利要求11所述的终端，其特征在于，所述接收单元具体用于：
    接收所述服务小区的基站发送的高层信令，所述高层信令中携带有所述第一功率比限制集合及所述第二功率比限制集合。
  13. 根据权利要求11或12所述的终端，其特征在于，所述处理单元具体用于：
    根据预设估计算法、所述第一功率比限制集合以及所述第二功率比限制集合获得所述第一功率比和所述第二功率比；
    根据所述第一功率比和所述第二功率比获得所述第一传输信道的第一信道矩阵和所述第二传输信道的第二信道矩阵；
    根据所述第一信道矩阵和所述第二信道矩阵，采用预设解调算法对所述PDCCH信号进行解调，从而获得所述第二原始PDCCH信号。
  14. 根据权利要求13所述的终端，其特征在于，所述预设估计算法包括广义最大似然算法或最小能量算法。
  15. 一种系统，其特征在于，包括如权利要求8-10任一项所述的基站和如权利要求11-14任一项所述的终端。
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102118870A (zh) * 2011-01-14 2011-07-06 大唐移动通信设备有限公司 终端调度方法和设备
CN102325378A (zh) * 2011-08-31 2012-01-18 新邮通信设备有限公司 控制物理下行控制信道传输的方法和设备
US20130336273A1 (en) * 2011-02-14 2013-12-19 Ntt Docomo, Inc. Aperiodic channel state information reporting method, radio base station apparatus and user terminal
WO2014165655A1 (en) * 2013-04-05 2014-10-09 Qualcomm Incorporated Methods and apparatus for transmission restriction and efficient signaling
CN105050193A (zh) * 2015-07-20 2015-11-11 华为技术有限公司 一种信号发送、解调方法以及设备和系统

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101618132B1 (ko) * 2012-04-06 2016-05-04 엘지전자 주식회사 무선 통신 시스템에서 측정 방법 및 장치
US9167597B2 (en) * 2012-07-13 2015-10-20 Samsung Electronics Co., Ltd. Methods and apparatus for transmission of uplink sounding reference signals in a communication system with large number of antennas
US9407302B2 (en) * 2012-12-03 2016-08-02 Intel Corporation Communication device, mobile terminal, method for requesting information and method for providing information
US9686063B2 (en) * 2013-04-04 2017-06-20 Qualcomm Incorporated TPR management for EPDCCH in LTE
CN104660529B (zh) * 2015-01-27 2018-01-23 华为技术有限公司 一种增强型下行控制信道的接收信号处理方法及装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102118870A (zh) * 2011-01-14 2011-07-06 大唐移动通信设备有限公司 终端调度方法和设备
US20130336273A1 (en) * 2011-02-14 2013-12-19 Ntt Docomo, Inc. Aperiodic channel state information reporting method, radio base station apparatus and user terminal
CN102325378A (zh) * 2011-08-31 2012-01-18 新邮通信设备有限公司 控制物理下行控制信道传输的方法和设备
WO2014165655A1 (en) * 2013-04-05 2014-10-09 Qualcomm Incorporated Methods and apparatus for transmission restriction and efficient signaling
CN105050193A (zh) * 2015-07-20 2015-11-11 华为技术有限公司 一种信号发送、解调方法以及设备和系统

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3307006A4 *

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