WO2013091242A1 - Signal transmitting and receiving method, device and signal transmitting/receiving system - Google Patents

Signal transmitting and receiving method, device and signal transmitting/receiving system Download PDF

Info

Publication number
WO2013091242A1
WO2013091242A1 PCT/CN2011/084545 CN2011084545W WO2013091242A1 WO 2013091242 A1 WO2013091242 A1 WO 2013091242A1 CN 2011084545 W CN2011084545 W CN 2011084545W WO 2013091242 A1 WO2013091242 A1 WO 2013091242A1
Authority
WO
WIPO (PCT)
Prior art keywords
downlink signal
signal
downlink
weight
beamforming weight
Prior art date
Application number
PCT/CN2011/084545
Other languages
French (fr)
Chinese (zh)
Inventor
张劲林
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2011/084545 priority Critical patent/WO2013091242A1/en
Priority to CN201180070912.0A priority patent/CN103563265B/en
Publication of WO2013091242A1 publication Critical patent/WO2013091242A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a signal transmitting and receiving method, a device, and a signal transceiving system.
  • a user equipment In a wireless system, a user equipment (UE) generally uses a Common Reference Signal (CRS), for example, a cell reference signal in Long Term Evolution (LTE) as a demodulation public information. Reference signal. Since the common reference signal serves all terminals in the cell, the common reference signal is transmitted omnidirectionally within the cell coverage area.
  • CRS Common Reference Signal
  • LTE Long Term Evolution
  • a beamforming method is generally used, and the signal energy sent by a certain UE is concentrated in a narrow range, thereby improving the downlink signal strength received by the UE.
  • the signal transmission range after beamforming is different from the common reference signal, the signal after beamforming differs from the channel experienced by the common reference signal. If the UE still uses the common reference signal as the reference signal for demodulation, there may be a phase difference between the demodulated downlink signal and the actual downlink signal, resulting in a demodulation error.
  • Embodiments of the present invention provide a signal transmitting and receiving method, a device, and a signal transceiving system.
  • the phase difference between the downlink signal demodulated by the user equipment and the actual downlink signal is reduced.
  • an embodiment of the present invention provides a signaling method, including:
  • the modulated downlink signal is transmitted to the terminal, and the modulated downlink signal is beamformed using the corrected beamforming weight.
  • the embodiment of the invention further provides a signal receiving method, including:
  • the following line common reference signal is used as a reference to demodulate the downlink signal.
  • the embodiment of the present invention further provides a base station, including:
  • a modulator for modulating a downlink signal to be transmitted
  • a processor configured to determine a beamforming weight according to the modulated downlink signal, and modify the beamforming weight according to the channel response measured on the uplink channel and the weight of the downlink common reference signal;
  • a transmitter configured to send the modulated downlink signal to the terminal, where the modulated downlink signal is beamformed by using the modified beamforming weight.
  • the embodiment of the invention further provides a terminal, including:
  • a receiver configured to receive a downlink signal sent by the base station, where the downlink signal uses a modified beamforming weight to perform beamforming, where the modified beamforming weight is determined by the base station according to the channel response measured on the uplink channel and the downlink The weight of the common reference signal, and the beamforming weight determined by the modulated downlink signal is corrected and obtained;
  • the demodulator is used for demodulating the downlink signal based on the following common reference signal.
  • the embodiment of the present invention further provides a signal transceiving system, including: a base station and a terminal; the base station is configured to: modulate a downlink signal to be transmitted; and determine a beamforming weight according to the modulated downlink signal; Correcting the beamforming weight value by using a channel response measured on the uplink channel and a weight of the downlink common reference signal; transmitting the modulated downlink signal to the terminal, where the modulated downlink signal adopts the corrected beamforming right Value for beamforming;
  • the terminal is configured to: receive a downlink signal sent by the base station, where the downlink signal uses the modified beamforming weight to perform beamforming, and the modified beamforming weight is determined by the base station according to the channel response measured on the uplink channel, and the downlink
  • the weight of the common reference signal is corrected for the beamforming weight determined by the modulated downlink signal; and the downlink signal is demodulated based on the downlink common reference signal.
  • the base station side corrects the beamforming weight according to the channel response measured on the uplink channel and the weight of the common reference signal, thereby reducing the terminal solution.
  • FIG. 1 is a flowchart of an embodiment of a signal sending method provided by the present invention
  • FIG. 2 is a schematic diagram of an azimuth angle of a base station transmit antenna array element and a terminal;
  • FIG. 3 is a flow chart of an embodiment of a signal receiving method provided by the present invention.
  • FIG. 4 is a schematic structural diagram of an embodiment of a base station for performing the foregoing signal sending method according to the present invention
  • FIG. 5 is a schematic structural diagram of an embodiment of a terminal for performing the above signal receiving method according to the present invention.
  • FIG. 6 is a schematic structural diagram of an embodiment of a signal transceiving system for performing the above-described signal transmitting method and signal receiving method according to the present invention.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The technical solutions in the embodiments of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention. It is clear that the described embodiments are only a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without departing from the inventive scope are the scope of the present invention.
  • FIG. 1 is a flowchart of an embodiment of a signal sending method according to the present invention. As shown in FIG. 1, the method includes:
  • the execution body of the above steps is a base station.
  • the terminal involved in this embodiment may be a user equipment UE such as a mobile terminal.
  • the base station can adopt various existing modulation methods for the modulation of the downlink signal, for example, Quadrature Amplitude Modulation (QAM) and Quadrature Phase Shift Keying (QPSK). Etc., it is not intended to limit the invention.
  • QAM Quadrature Amplitude Modulation
  • QPSK Quadrature Phase Shift Keying
  • the base station can determine the beamforming weight according to the modulated downlink signal, and can adopt various existing methods, such as a direction estimation method or a eigenvalue method.
  • the following uses the direction estimation method as an example to describe the base station determining the beamforming weight according to the modulated downlink signal.
  • Figure 2 shows a linear array of N-array equally spaced d.
  • the base station first needs to obtain the angle ⁇ between the normal direction of the array antenna and the terminal, and then calculate the beamforming weight according to the following formula.
  • the beam forming weight is the weight that makes the terminal receive the strongest downlink signal strength:
  • N is the number of array elements of the base station transmit antenna
  • ⁇ is the array element
  • the spacing, ⁇ is the angle between the normal direction of the array antenna and the terminal, and is the wavelength of the downlink signal carrier.
  • the method for determining the beamforming weight of the base station is described by using the direction estimation method as an example. However, the method is not limited to the present invention. In fact, the base station may also determine the beamforming weight by using various existing methods.
  • the downlink common reference signal for omnidirectional transmission If the number of antennas transmitting the downlink signal is ⁇ , the downlink common reference signal for omnidirectional transmission
  • the weight of the cell reference signal (for example, the cell reference signal in LTE) is N x 1 , and the beamforming weight determined according to the modulated downlink signal is a vector ⁇ ⁇ 1 .
  • the channel response of the downlink channel transmitting the downlink signal is represented by a vector H of ⁇ N , where M is the number of antennas receiving the downlink signal. Then, the channel response measured by the terminal on the downlink common reference signal is.
  • the following common reference signal of the terminal is used as a reference. Based on the maximum ratio combining, the demodulated downlink signal is:
  • S is a downlink signal received by the terminal, and is a downlink signal obtained after demodulation
  • HW D is a channel response measured by the terminal on the downlink signal.
  • the base station can measure on the uplink channel.
  • the channel response H thereby correcting the beamforming weight ⁇ according to the weight of the channel response and the common reference signal on the uplink channel, thereby adjusting the phase of the wide ( ⁇ ) by correcting the beamforming weight ⁇ .
  • Downlink signal demodulated by the terminal Real number therefore, the terminal demodulates
  • the phase difference between the downlink signal and the actual downlink signal is mainly determined by ( ⁇ ⁇ ⁇ ).
  • the phase of ( ⁇ ⁇ ) can be adjusted to reduce the downlink after demodulation of the terminal.
  • the phase difference between the signal and the actual downstream signal It is also possible to make ( ⁇ ( ) a real number by correcting the beamforming weight ⁇
  • Ringing reducing the phase difference between the downlink signal after demodulation of the terminal and the actual downlink signal.
  • the modified beamforming weight may be used to perform beamforming on the downlink signal to be transmitted, and the downlink signal energy sent to the terminal is concentrated in a certain range to improve terminal receiving.
  • Array gain Since the base station performs beamforming on the downlink signal to be transmitted by using the modified beamforming weight, the phase amplitude in the ⁇ is adjusted, thereby reducing the influence on the phase of the downlink signal S received by the terminal, and reducing the terminal. The phase difference between the demodulated downlink signal and the actual downlink signal.
  • the amplitude modulation of the downlink signal may actually be included.
  • the downlink after demodulation of the terminal may also be reduced. The amplitude deviation between the signal and the actual downstream signal.
  • the base station side corrects the beamforming weight according to the channel response measured on the uplink channel and the weight of the common reference signal, thereby reducing the downlink signal and the actual downlink after the terminal is demodulated.
  • the phase difference between the signals is a simple integer value.
  • FIG. 3 is a flowchart of another embodiment of a signal receiving method according to the present invention. As shown in FIG. 2, the method includes:
  • S201 Receive a downlink signal sent by the base station, where the downlink signal uses a modified beamforming weight to perform beamforming, where the modified beamforming weight is determined by the base station according to the channel response measured on the uplink channel and the downlink common reference signal. Value, the beam determined for the modulated downlink signal Forming weights for correction acquisition;
  • S202 The following common reference signal is used as a reference to demodulate the downlink signal.
  • the execution subject of the above steps is a terminal, and specifically may be a user equipment UE such as a mobile terminal.
  • the base station can adopt various modulation methods, for example, modulation methods such as QAM and QPSK to modulate the downlink signal to be transmitted.
  • modulation methods such as QAM and QPSK
  • the base station further determines the beamforming weight according to the direction estimation method or the eigenvalue method according to the modulated downlink signal.
  • the weight of the downlink common reference signal used for omnidirectional transmission is a vector ⁇ ⁇ 1
  • the beamforming weight determined according to the modulated downlink signal is a vector of ⁇ ⁇ 1 ⁇ .
  • the channel response of the downlink channel transmitting the downlink signal is represented by a vector H of ⁇ N , where M is the number of antennas receiving the downlink signal.
  • the channel response measured by the terminal on the downlink common reference signal is R.
  • the following common reference signal of the terminal is used as a reference. Based on the maximum ratio combining, the demodulated downlink signal is:
  • S is a downlink signal received by the terminal, and is a downlink signal obtained after demodulation
  • HW D is a channel response measured by the terminal on the downlink signal.
  • the base station can measure the channel response H on the uplink channel, thereby being based on the uplink channel. Measuring the channel response and the weight of the common reference signal
  • the terminal After receiving the downlink signal, the terminal performs beamforming on the downlink signal with the modified beamforming weight. Therefore, the terminal can demodulate the downlink signal by using the common reference signal as a reference, as a feasible implementation manner.
  • the line signal is demodulated.
  • S is the downlink signal received by the terminal
  • r is the downlink signal obtained by the terminal after demodulation
  • H is the channel response measured by the terminal on the downlink common reference signal
  • H is the channel response measured by the terminal on the downlink signal. Due to the downlink signal demodulated by the terminal i ⁇ r
  • the phase of ( ⁇ ) ( ⁇ ) has been adjusted, even ( ⁇ ) ( ⁇ ) can be a real number. Therefore, the influence on the phase of the downlink signal s received by the terminal is reduced, and the downlink signal obtained after demodulation is reduced.
  • the base station side corrects the beamforming weight according to the channel response of the detected uplink channel and the weight of the common reference signal.
  • the terminal demodulates the downlink signal by using the following common reference signal as a reference.
  • the phase difference between the demodulated downlink signal and the actual downlink signal is reduced.
  • the beamforming weight determined by the base station according to the demodulated downlink signal is ⁇
  • the channel response measured by the base station on the uplink channel is H
  • the downlink common reference signal is The weight of the beam is ⁇
  • the corrected beamforming weight of the base station can be:
  • H is the channel response measured by the base station on the uplink channel
  • ⁇ is the weight of the downlink common reference signal
  • ⁇ is the beamforming weight
  • ⁇ is the amplitude adjustment factor
  • the value of ⁇ is in HW R f To
  • the beamforming weight is repaired.
  • the transmit power of the downlink signal is unchanged after the correction of the front and the beamforming weights. Therefore, in the implementation scenario where the transmit power of the downlink signal is a decisive factor limiting the performance of the system, that is, an application scenario requiring high coverage of the base station Next, ⁇ can take I (H ⁇ ⁇ (HW R d, the downlink signal obtained by the terminal after demodulation is transmitted by the base station
  • the amplitude deviation There is an amplitude deviation between the downlink signals. If the modulation of the downlink signal by the base station does not involve amplitude modulation, then the amplitude deviation does not affect the downlink signal obtained by the terminal after demodulation, but if the modulation of the downlink signal by the base station involves amplitude modulation, then this The amplitude deviation will demodulate the terminal.
  • the downlink signal to it has a certain impact. Therefore, if the modulation of the downlink signal by the base station does not involve amplitude modulation, then If the base station downlink modulated signal involves an amplitude modulation, it may take ⁇ 1 ⁇ 2 ⁇ . However, when the ⁇ is used, the transmission power of the downlink signal is affected, and therefore, it can be applied to an application scenario where the coverage of the base station is not high.
  • the terminal may use the orthogonality of the two signals to solve the two signals.
  • the base station uses the Space Time Block Code (STBC) to transmit orthogonal downlink signals on two consecutive time slices.
  • STBC Space Time Block Code
  • the downlink signal transmitted by the base station on the first time slice is, on the second time slice.
  • the downlink signal transmitted is -4.
  • the downlink signals demodulated by the terminal on two time slices are:
  • the amplitude adjustment factor can be determined according to the modulation mode of the base station, the coverage requirement of the base station, the system interference situation, and the manner in which the base station transmits the downlink signal.
  • ⁇ can be in
  • the modulation of the downlink signal to be transmitted does not involve amplitude modulation, the value of the "can approach 0, that is, the value of "can be infinitely close to 0," Because the amplitude does not carry useful information, therefore, the value of "approximating to 0 can improve the transmission power of the downlink signal, thereby improving the downlink signal reception performance of the system and facilitating the demodulation of the downlink signal.
  • the modulation of the downlink signal to be transmitted involves amplitude modulation, and the value of "can be approached to 1.
  • the base station may further influence the demodulation of the terminal or other system performance indicators according to the transmission power of the downlink signal, and the phase-to-terminal solution of the downlink signal. Determine the value of the impact of the impact of other system performance indicators.
  • the transmit power of the downlink signal affects the demodulation of the terminal or other system performance indicators, and the phase-to-terminal demodulation of the downlink signal Or the impact of other system performance indicators can be measured in a linear proportional relationship, when the downlink signal's transmit power affects the terminal's demodulation or other system performance indicators, and the downlink signal's phase-to-terminal demodulation or other system performance indicators When the effects are roughly the same, "can take 0.5. It can be understood that the proportional relationship between the transmission power of the downlink signal on the demodulation of the terminal or other system performance indicators, and the influence of the phase of the downlink signal on the demodulation of the terminal or other system performance indicators may be determined by the base station according to the system. The actual situation is determined, and then the "value, for example,” can be determined to be between 0.5 and 1, so as to avoid the deviation of the amplitude between the downlink signal received by the terminal and the pilot affecting the demodulation quality of the downlink signal.
  • the transmit power of the downlink signal is a determining factor limiting system performance
  • the value of "the value may approach 0.
  • the transmit power of the downlink signal is a decision that limits system performance.
  • the factor may be that the transmit power of the downlink signal has a decisive influence on the terminal receiving the downlink signal or demodulating the downlink signal. For example, in an implementation scenario where the terminal is far away from the base station, if the transmit power of the downlink signal is small, the terminal receives The downlink signal may be weak. In this case, the terminal cannot even demodulate the downlink signal.
  • the value can be close to 0, so that the transmission power of the downlink signal is maximized; Downlink signal transmission power Instead of limiting the performance of the system, the value of "can be closer to 1.
  • the base station can determine the "according to the influence of the amplitude and phase of the downlink signal on the performance of the system.” value.
  • the value of a may approach 1.
  • the base station may correct the amplitude error regardless of the phase difference, and then the base station, where H is on the uplink.
  • the channel response measured on the channel, ⁇ is the weight of the downlink common reference signal, which is the beamforming weight, which is the corrected beamforming weight.
  • the beamforming weight which is the corrected beamforming weight.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).
  • the base station includes: a modulator 11, a processor 12, and a transmitter 13; and a modulator 11 Modulating the downlink signal to be transmitted;
  • the processor 12 determines a beamforming weight according to the modulated downlink signal, and corrects the beamforming weight according to the channel response measured on the uplink channel and the weight of the downlink common reference signal;
  • the transmitter 13 is configured to send the modulated downlink signal to the terminal, and the modulated downlink signal performs beamforming by using the modified beamforming weight.
  • the base station provided by the present invention for performing the above signal transmission method is still another embodiment,
  • H is the channel response measured on the uplink channel
  • W R is the weight of the downlink common reference signal
  • ⁇ is the beamforming weight
  • ⁇ is the amplitude adjustment factor
  • the value of ⁇ is
  • ⁇ Determine the amplitude adjustment factor, where "is a compromise factor, the value is between 0 and 1," is determined according to the transmission mode, modulation mode or transmission power of the downlink signal.
  • the processor 12 is further configured to: if the modulation of the downlink signal to be sent by the modulator 11 does not involve amplitude modulation, determine that the value of the "approaching is close to 0, otherwise, determining the value of the approach is approaching If the modulator 11 uses non-amplitude modulation of the downlink signal, it is determined that the value of the "negative value approaches 0; or, if the transmitter 13 transmits the power of the downlink signal, the system performance is limited. The determinant, the value of the "becomes close to 0, otherwise the value of the "approximate to 1"; or, if the transmitter 13 transmits the downlink signal by using transmit diversity, the " The value is close to 1.
  • H is the channel response measured on the uplink channel
  • ⁇ is the weight of the downlink common reference signal
  • ⁇ is the beamforming weight, which is the corrected beamforming weight
  • the base station provided by the embodiment of the present invention is an execution device of the signal sending method provided by the present invention.
  • the specific process of the method for transmitting the signal refer to the embodiment of the signal sending method, which is not described again.
  • the base station provided by the embodiment of the present invention is based on the channel response and the common parameter measured on the uplink channel.
  • the weight of the test signal is modified to correct the beamforming weight, thereby reducing the phase difference between the demodulated downlink signal and the actual downlink signal.
  • FIG. 5 is a schematic structural diagram of an embodiment of a terminal for performing the foregoing signal receiving method according to the present invention. As shown in FIG. 5, the terminal includes: a receiver 21 and a demodulator 22;
  • the receiver 21 is configured to receive a downlink signal sent by the base station, where the downlink signal uses the modified beamforming weight to perform beamforming, where the modified beamforming weight is determined by the base station according to the channel response measured on the uplink channel and the downlink common Correcting the beamforming weight determined by the modulated downlink signal by using the weight of the reference signal;
  • the demodulator is used for demodulating the downlink signal based on the following common reference signal.
  • the adjusted downlink signal, H ⁇ is the channel response measured by the terminal on the downlink common reference signal
  • HW is the channel response measured by the terminal on the downlink signal.
  • the terminal provided by the embodiment of the present invention is an execution device of the signal receiving method provided by the present invention.
  • For the specific process of the signal receiving method refer to the embodiment of the signal receiving method, which is not described again.
  • the base station side corrects the beamforming weight according to the channel response measured on the uplink channel and the weight of the common reference signal, and can reduce the downlink signal between the terminal and the actual downlink signal.
  • the phase difference is the case difference.
  • Figure 6 is a schematic structural diagram of an embodiment of a signal transceiving system for performing the above-mentioned signal transmitting method and signal receiving method, as shown in Figure 6, the signal transceiving provides base station 1 and terminal 2;
  • the base station 1 is configured to: modulate a downlink signal to be transmitted; determine a beamforming weight according to the modulated downlink signal; perform beamforming weight according to a channel response measured on the uplink channel, and a weight of the downlink common reference signal Correction; transmitting modulated downlink signal to the terminal, modulation The subsequent downlink signal is beamformed using the corrected beamforming weight;
  • the terminal 2 is configured to: receive a downlink signal sent by the base station, where the downlink signal uses the modified beamforming weight to perform beamforming, and the modified beamforming weight is determined by the base station according to the channel response measured on the uplink channel, and the downlink common reference signal.
  • the weight value is used to correct the beamforming weight determined by the modulated downlink signal; the following common reference signal is used as a reference to demodulate the downlink signal.
  • the base station side may modify the beamforming weight according to the channel response measured on the uplink channel and the weight of the common reference signal, thereby reducing the downlink signal and the actual demodulation of the terminal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)

Abstract

The embodiments of the present invention provide a signal transmitting and receiving method, device and signal transmitting/receiving system. The transmitting method comprises: modulating the downlink signal to be transmitted; according to the modulated downlink signal, confirming the beamforming weight; according to a channel response measured in a uplink channel and the weight of downlink common reference signal, correcting the beamforming weight; transmitting the modulated downlink signal to a terminal, and the modulated downlink signal adopts the corrected beamforming weight to perform beamforming. The signal transmitting and receiving method, device and signal transmitting/receiving system provided by the embodiments of the present invention reduces the phase difference between the downlink signal modulated by the terminal and the actual downlink signal.

Description

信号发送、 接收方法、 设备和信号收发系统  Signal transmitting, receiving method, device and signal transmitting and receiving system
技术领域 本发明涉及通信技术领域， 特别涉及一种信号发送、 接收方法、 设备和 信号收发系统。 背景技术 在无线系统中， 用户设备 ( User Equipment, UE )通常采用公共参考信 号 ( Common Reference Signal, CRS ),例如： 长期演进 ( Long Term Evolution, LTE ) 中的小区参考信号作为解调公共信息的基准信号。 由于公共参考信号 为小区中所有终端服务， 因此， 公共参考信号在小区覆盖区域内全向发送。 The present invention relates to the field of communications technologies, and in particular, to a signal transmitting and receiving method, a device, and a signal transceiving system. In a wireless system, a user equipment (UE) generally uses a Common Reference Signal (CRS), for example, a cell reference signal in Long Term Evolution (LTE) as a demodulation public information. Reference signal. Since the common reference signal serves all terminals in the cell, the common reference signal is transmitted omnidirectionally within the cell coverage area.
现有技术中通常采用波束形成方法， 将为某个 UE发送的信号能量集中 在很窄的范围内， 从而提高 UE接收的下行信号强度。 然而， 由于波束形成 后的信号发射范围与公共参考信号不同， 因此， 波束形成后的信号和公共参 考信号经历的信道不同。 如果 UE仍以公共参考信号做基准信号进行解调， 可能导致解调后的下行信号与实际的下行信号之间存在相位差， 从而导致解 调错误。  In the prior art, a beamforming method is generally used, and the signal energy sent by a certain UE is concentrated in a narrow range, thereby improving the downlink signal strength received by the UE. However, since the signal transmission range after beamforming is different from the common reference signal, the signal after beamforming differs from the channel experienced by the common reference signal. If the UE still uses the common reference signal as the reference signal for demodulation, there may be a phase difference between the demodulated downlink signal and the actual downlink signal, resulting in a demodulation error.
发明内容 本发明实施例提供了一种信号发送、 接收方法、 设备和信号收发系统。 以减小用户设备解调后的下行信号与实际下行信号之间的相位差。 SUMMARY OF THE INVENTION Embodiments of the present invention provide a signal transmitting and receiving method, a device, and a signal transceiving system. The phase difference between the downlink signal demodulated by the user equipment and the actual downlink signal is reduced.
一方面， 本发明实施例提供一种信号发送方法， 包括：  In one aspect, an embodiment of the present invention provides a signaling method, including:
对待发送的下行信号进行调制；  Modulating the downlink signal to be transmitted;
根据调制后的下行信号确定波束形成权值；  Determining a beamforming weight according to the modulated downlink signal;
根据在上行信道上测量的信道响应， 以及下行公共参考信号的权值， 对 所述波束形成权值进行修正； 向终端发送调制后的下行信号， 该调制后的下行信号采用修正后的波束 形成权值进行波束形成。 Correcting the beamforming weight according to a channel response measured on the uplink channel and a weight of the downlink common reference signal; The modulated downlink signal is transmitted to the terminal, and the modulated downlink signal is beamformed using the corrected beamforming weight.
本发明实施例还提供一种信号接收方法， 包括：  The embodiment of the invention further provides a signal receiving method, including:
接收基站发送的下行信号， 该下行信号采用修正后的波束形成权值进行 波束形成， 其中， 该修正后的波束形成权值由基站根据在上行信道上测量的 信道响应以及下行公共参考信号的权值， 对调制后的下行信号确定的波束形 成权值进行修正获取；  Receiving a downlink signal sent by the base station, where the downlink signal is beamformed by using a modified beamforming weight, wherein the corrected beamforming weight is determined by the base station according to the channel response measured on the uplink channel and the downlink common reference signal a value, the corrected beamforming weight determined by the modulated downlink signal is obtained;
以下行公共参考信号为基准， 对下行信号进行解调。  The following line common reference signal is used as a reference to demodulate the downlink signal.
另一方面， 本发明实施例还提供一种基站， 包括：  In another aspect, the embodiment of the present invention further provides a base station, including:
调制器， 用于对待发送的下行信号进行调制；  a modulator for modulating a downlink signal to be transmitted;
处理器， 用于根据调制后的下行信号确定波束形成权值， 并根据在上行 信道上测量的信道响应， 以及下行公共参考信号的权值， 对该波束形成权值 进行修正；  a processor, configured to determine a beamforming weight according to the modulated downlink signal, and modify the beamforming weight according to the channel response measured on the uplink channel and the weight of the downlink common reference signal;
发送器， 用于向终端发送调制后的下行信号， 该调制后的下行信号采用 修正后的波束形成权值进行波束形成。  And a transmitter, configured to send the modulated downlink signal to the terminal, where the modulated downlink signal is beamformed by using the modified beamforming weight.
本发明实施例还提供一种终端， 包括：  The embodiment of the invention further provides a terminal, including:
接收器， 用于接收基站发送的下行信号， 该下行信号采用修正后的波束 形成权值进行波束形成， 其中， 该修正后的波束形成权值由基站根据在上行 信道上测量的信道响应以及下行公共参考信号的权值， 对调制后的下行信号 确定的波束形成权值进行修正获取；  a receiver, configured to receive a downlink signal sent by the base station, where the downlink signal uses a modified beamforming weight to perform beamforming, where the modified beamforming weight is determined by the base station according to the channel response measured on the uplink channel and the downlink The weight of the common reference signal, and the beamforming weight determined by the modulated downlink signal is corrected and obtained;
解调器， 用于以下行公共参考信号为基准， 对下行信号进行解调。  The demodulator is used for demodulating the downlink signal based on the following common reference signal.
再一方面， 本发明实施例还提供一种信号收发系统， 包括： 基站和终端； 所述基站用于： 对待发送的下行信号进行调制； 根据调制后的下行信号 确定波束形成权值； 根据在上行信道上测量的信道响应， 以及下行公共参考 信号的权值， 对所述波束形成权值进行修正； 向终端发送调制后的下行信号， 所述调制后的下行信号采用修正后的波束形成权值进行波束形成； 所述终端用于： 接收基站发送的下行信号， 下行信号采用修正后的波束 形成权值进行波束形成， 修正后的波束形成权值由所述基站根据在上行信道 上测量的信道响应， 以及下行公共参考信号的权值， 对调制后的下行信号确 定的波束形成权值进行修正获取； 以所述下行公共参考信号为基准， 对下行 信号进行解调。 In another aspect, the embodiment of the present invention further provides a signal transceiving system, including: a base station and a terminal; the base station is configured to: modulate a downlink signal to be transmitted; and determine a beamforming weight according to the modulated downlink signal; Correcting the beamforming weight value by using a channel response measured on the uplink channel and a weight of the downlink common reference signal; transmitting the modulated downlink signal to the terminal, where the modulated downlink signal adopts the corrected beamforming right Value for beamforming; The terminal is configured to: receive a downlink signal sent by the base station, where the downlink signal uses the modified beamforming weight to perform beamforming, and the modified beamforming weight is determined by the base station according to the channel response measured on the uplink channel, and the downlink The weight of the common reference signal is corrected for the beamforming weight determined by the modulated downlink signal; and the downlink signal is demodulated based on the downlink common reference signal.
本发明实施例提供的信号发送、 接收方法、 设备和信号收发系统， 基站 侧根据在上行信道上测量的信道响应和公共参考信号的权值， 对波束形成权 值进行修正，从而减小终端解调后的下行信号与实际下行信号之间的相位差。 附图说明 为了更清楚地说明本发明实施例或现有技术中的技术方案， 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。  The signal transmitting and receiving method, the device, and the signal transceiving system provided by the embodiment of the present invention, the base station side corrects the beamforming weight according to the channel response measured on the uplink channel and the weight of the common reference signal, thereby reducing the terminal solution. The phase difference between the adjusted downlink signal and the actual downlink signal. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments or the description of the prior art will be briefly described below, and obviously, in the following description The drawings are only some of the embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.
图 1为本发明提供的信号发送方法一个实施例的流程图；  1 is a flowchart of an embodiment of a signal sending method provided by the present invention;
图 2为基站发射天线阵元与终端所处方位角的示意图；  2 is a schematic diagram of an azimuth angle of a base station transmit antenna array element and a terminal;
图 3为本发明提供的信号接收方法一个实施例的流程图；  3 is a flow chart of an embodiment of a signal receiving method provided by the present invention;
图 4为本发明提供的用于执行上述信号发送方法的基站一个实施例的结 构示意图；  4 is a schematic structural diagram of an embodiment of a base station for performing the foregoing signal sending method according to the present invention;
图 5为本发明提供的用于执行上述信号接收方法的终端一个实施例的结 构示意图；  FIG. 5 is a schematic structural diagram of an embodiment of a terminal for performing the above signal receiving method according to the present invention; FIG.
图 6为本发明提供的用于执行上述信号发送方法和信号接收方法的信号 收发系统一个实施例的结构示意图。 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做 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。 FIG. 6 is a schematic structural diagram of an embodiment of a signal transceiving system for performing the above-described signal transmitting method and signal receiving method according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The technical solutions in the embodiments of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention. It is clear that the described embodiments are only a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without departing from the inventive scope are the scope of the present invention.
图 1为本发明提供的信号发送方法一个实施例的流程图， 如图 1所示， 该 方法包括：  FIG. 1 is a flowchart of an embodiment of a signal sending method according to the present invention. As shown in FIG. 1, the method includes:
5101、 对待发送的下行信号进行调制；  5101. Modulate a downlink signal to be sent;
5102、 根据调制后的下行信号确定波束形成权值；  5102. Determine a beamforming weight according to the modulated downlink signal.
5103、 根据在上行信道上测量的信道响应， 以及下行公共参考信号的权 值， 对波束形成权值进行修正；  5103. Correct a beamforming weight according to a channel response measured on the uplink channel and a weight of the downlink common reference signal.
5104、 向终端发送调制后的下行信号， 调制后的下行信号采用修正后的 波束形成权值进行波束形成。  5104. Send the modulated downlink signal to the terminal, and the modulated downlink signal performs beamforming by using the modified beamforming weight.
以上步骤的执行主体为基站。 本实施例涉及的终端可以是移动终端等用 户设备 UE。  The execution body of the above steps is a base station. The terminal involved in this embodiment may be a user equipment UE such as a mobile terminal.
本发明实施例中，基站对下行信号的调制可以采用现有的各种调制方法， 例如： 正交幅度调制 （ Quadrature Amplitude Modulation, QAM ) 、 正交相移 键控（ Quadrature Phase Shift Keying, QPSK )等， 并不以此作为对本发明的 限制。  In the embodiment of the present invention, the base station can adopt various existing modulation methods for the modulation of the downlink signal, for example, Quadrature Amplitude Modulation (QAM) and Quadrature Phase Shift Keying (QPSK). Etc., it is not intended to limit the invention.
基站根据调制后的下行信号确定波束形成权值可以采用现有的各种方 式， 例如： 方向估计方法或特征值法等。  The base station can determine the beamforming weight according to the modulated downlink signal, and can adopt various existing methods, such as a direction estimation method or a eigenvalue method.
以下以方向估计方法为例， 对基站根据调制后的下行信号确定波束形成 权值进行说明。 图 2所示为 N阵元等间距为 d的线性阵列。 基站首先需要获得 阵列天线法向和终端的夹角 Θ, 进而可以根据以下公式计算波束形成权值， 该 波束形成权值即为使终端接收到的下行信号强度最强的权值：
Figure imgf000006_0001
The following uses the direction estimation method as an example to describe the base station determining the beamforming weight according to the modulated downlink signal. Figure 2 shows a linear array of N-array equally spaced d. The base station first needs to obtain the angle Θ between the normal direction of the array antenna and the terminal, and then calculate the beamforming weight according to the following formula. The beam forming weight is the weight that makes the terminal receive the strongest downlink signal strength:
Figure imgf000006_0001
其中， 为波束形成权值， N为基站发射天线的阵元的数量， ί为阵元 间距， Θ为阵列天线法向和终端的夹角， 为下行信号载波的波长。 以上仅以方向估计方法为例说明基站确定波束形成权值的方法， 但并不 以此作为本发明的限制， 实际上， 基站还可以采用现有的各种方法确定波束 形成权值。 Where is the beamforming weight, N is the number of array elements of the base station transmit antenna, and ί is the array element The spacing, Θ is the angle between the normal direction of the array antenna and the terminal, and is the wavelength of the downlink signal carrier. The method for determining the beamforming weight of the base station is described by using the direction estimation method as an example. However, the method is not limited to the present invention. In fact, the base station may also determine the beamforming weight by using various existing methods.
如果发射下行信号的天线根数为 Ν, 用于全向发送的下行公共参考信号 If the number of antennas transmitting the downlink signal is Ν, the downlink common reference signal for omnidirectional transmission
(例如： LTE中的小区参考信号） 的权值为 N x 1的向量 ^， 根据调制后的下 行信号确定的波束形成权值为 Ν χ 1的向量^。 发送下行信号的下行信道的信 道响应用 Μ χ N的向量 H表示， 其中 M为接收下行信号的天线根数。 则终端在下 行公共参考信号上测量的信道响应为 。终端以下行公共参考信号为基准， 基于最大比合并， 解调出的下行信号为：
Figure imgf000007_0001
The weight of the cell reference signal (for example, the cell reference signal in LTE) is N x 1 , and the beamforming weight determined according to the modulated downlink signal is a vector Ν χ 1 . The channel response of the downlink channel transmitting the downlink signal is represented by a vector H of χ N , where M is the number of antennas receiving the downlink signal. Then, the channel response measured by the terminal on the downlink common reference signal is. The following common reference signal of the terminal is used as a reference. Based on the maximum ratio combining, the demodulated downlink signal is:
Figure imgf000007_0001
其中， S为终端接收到的下行信号， 为解调后得到的下行信号， HWD为 终端在下行信号上测量的信道响应。 可以看出， 由于 1(^^)1为实数， 因此， 对解调出的下行信号的相位没有影响， 而当 ^， ^不相同时， (服 (服 为复数， 则解调出的信号与基站发射的下行信号之间存在相位与幅度偏差， 从而导致解调出的下行信号的星座图发生旋转和变形。 Wherein, S is a downlink signal received by the terminal, and is a downlink signal obtained after demodulation, and HW D is a channel response measured by the terminal on the downlink signal. It can be seen that since 1(^^)1 is a real number, there is no influence on the phase of the demodulated downlink signal, and when ^, ^ is not the same, (service is a complex number, then the demodulated signal There is a phase and amplitude deviation from the downlink signal transmitted by the base station, which causes the constellation of the demodulated downlink signal to rotate and deform.
据此， 本发明提供的信号发送方法， 在时分双工 （ Time Division Duplexing, TDD ) 系统中， 由于上行信道的信道响应 H与下行信道的信道响 应 H相同， 因此， 基站可以在上行信道上测量信道响应 H , 从而根据在上行 信道上测量信道响应 和公共参考信号的权值 ^，对波束形成权值 ^进行修 正， 从而实现通过修正波束形成权值 ^来调整 广 ( ^)的相位。 由于终 端解调出的下行信号
Figure imgf000007_0002
为实数， 因此， 终端解调出 的下行信号 与实际下行信号之间的相位差主要由（ ^ ^ ^ )来决定， 因 此， 通过修正波束形成权值^ , 可以调整 ( ^ ^)的相位， 实现减小终 端解调后的下行信号与实际下行信号之间的相位差。 也可以通过修正波束形成权值 ^使（ Γ ( )为实数， 从而使
Figure imgf000008_0001
Accordingly, in the signal transmission method provided by the present invention, in the Time Division Duplexing (TDD) system, since the channel response H of the uplink channel is the same as the channel response H of the downlink channel, the base station can measure on the uplink channel. The channel response H, thereby correcting the beamforming weight ^ according to the weight of the channel response and the common reference signal on the uplink channel, thereby adjusting the phase of the wide (^) by correcting the beamforming weight ^. Downlink signal demodulated by the terminal
Figure imgf000007_0002
Real number, therefore, the terminal demodulates The phase difference between the downlink signal and the actual downlink signal is mainly determined by ( ^ ^ ^ ). Therefore, by correcting the beamforming weight ^, the phase of ( ^ ^) can be adjusted to reduce the downlink after demodulation of the terminal. The phase difference between the signal and the actual downstream signal. It is also possible to make ( Γ ( ) a real number by correcting the beamforming weight ^
Figure imgf000008_0001
响， 减小了终端解调后的下行信号与实际下行信号之间的相位差。 Ringing, reducing the phase difference between the downlink signal after demodulation of the terminal and the actual downlink signal.
基站侧对波束形成权值进行修正后， 可以采用修正后的波束形成权值， 对待发送的下行信号进行波束形成， 将向终端发送的下行信号能量集中在一 定的范围内， 来提高终端的接收阵列增益。 由于基站采用修改后的波束形成 权值对待发送的下行信号进行波束形成， 来调整 Ι^^Γ 中的相位幅 度，从而降低了对终端接收到的下行信号 S的相位产生影响，减小了终端解调 后的下行信号与实际下行信号之间的相位差。  After the base station side corrects the beamforming weight, the modified beamforming weight may be used to perform beamforming on the downlink signal to be transmitted, and the downlink signal energy sent to the terminal is concentrated in a certain range to improve terminal receiving. Array gain. Since the base station performs beamforming on the downlink signal to be transmitted by using the modified beamforming weight, the phase amplitude in the Ι^^Γ is adjusted, thereby reducing the influence on the phase of the downlink signal S received by the terminal, and reducing the terminal. The phase difference between the demodulated downlink signal and the actual downlink signal.
需要说明的是， 对波束形成权值进行修正的同时， 实际上也可能包含了 对下行信号的幅度调制， 这对于下行信号涉及幅度调制的实施场景下， 也可 以减小终端解调后的下行信号与实际下行信号之间的幅度偏差。  It should be noted that, when the beamforming weight is corrected, the amplitude modulation of the downlink signal may actually be included. In the implementation scenario where the downlink signal involves amplitude modulation, the downlink after demodulation of the terminal may also be reduced. The amplitude deviation between the signal and the actual downstream signal.
本发明实施例提供的信号发送方法， 基站侧根据在上行信道上测量的信 道响应和公共参考信号的权值， 对波束形成权值进行修正， 从而减小终端解 调后的下行信号与实际下行信号之间的相位差。  In the signal sending method provided by the embodiment of the present invention, the base station side corrects the beamforming weight according to the channel response measured on the uplink channel and the weight of the common reference signal, thereby reducing the downlink signal and the actual downlink after the terminal is demodulated. The phase difference between the signals.
图 3为本发明提供的信号接收方法另一个实施例的流程图， 如图 2所示， 该方法包括：  FIG. 3 is a flowchart of another embodiment of a signal receiving method according to the present invention. As shown in FIG. 2, the method includes:
S201、 接收基站发送的下行信号， 下行信号采用修正后的波束形成权值 进行波束形成， 其中， 修正后的波束形成权值由基站根据在上行信道上测量 的信道响应以及下行公共参考信号的权值， 对调制后的下行信号确定的波束 形成权值进行修正获取； S201: Receive a downlink signal sent by the base station, where the downlink signal uses a modified beamforming weight to perform beamforming, where the modified beamforming weight is determined by the base station according to the channel response measured on the uplink channel and the downlink common reference signal. Value, the beam determined for the modulated downlink signal Forming weights for correction acquisition;
S202、 以下行公共参考信号为基准， 对下行信号进行解调。  S202: The following common reference signal is used as a reference to demodulate the downlink signal.
以上步骤的执行主体为终端， 具体可以是移动终端等用户设备 UE。 基站可以采用各种调制方式， 例如： QAM、 QPSK等调制方式对待发送 的下行信号进行调制。 基站还进一步根据调制后的下行信号， 根据方向估计 方法或特征值法等方式确定波束形成权值。  The execution subject of the above steps is a terminal, and specifically may be a user equipment UE such as a mobile terminal. The base station can adopt various modulation methods, for example, modulation methods such as QAM and QPSK to modulate the downlink signal to be transmitted. The base station further determines the beamforming weight according to the direction estimation method or the eigenvalue method according to the modulated downlink signal.
如果发射下行信号的天线根数为 N,用于全向发送的下行公共参考信号的 权值为 Ν χ 1的向量 ^， 根据调制后的下行信号确定的波束形成权值为 Ν χ 1的 向量 ^。 发送下行信号的下行信道的信道响应用 Μ χ N的向量 H表示， 其中 M 为接收下行信号的天线根数。 则终端在下行公共参考信号上测量的信道响应 为服 R。 终端以下行公共参考信号为基准， 基于最大比合并， 解调出的下行 信号为：
Figure imgf000009_0001
If the number of antennas transmitting the downlink signal is N, the weight of the downlink common reference signal used for omnidirectional transmission is a vector Ν χ 1 , and the beamforming weight determined according to the modulated downlink signal is a vector of Ν χ 1 ^. The channel response of the downlink channel transmitting the downlink signal is represented by a vector H of χ N , where M is the number of antennas receiving the downlink signal. Then, the channel response measured by the terminal on the downlink common reference signal is R. The following common reference signal of the terminal is used as a reference. Based on the maximum ratio combining, the demodulated downlink signal is:
Figure imgf000009_0001
其中， S为终端接收到的下行信号， 为解调后得到的下行信号， HWD为 终端在下行信号上测量的信道响应。 可以看出， 由于 1(^^)1为实数， 因此， 对解调出的下行信号的相位没有影响， 而当 ^， ^不相同时， (服 Rf (服 为复数， 则终端解调出的信号与基站发射的下行信号之间存在相位与幅度偏 差， 从而导致解调出的下行信号的星座图发生旋转和变形。 Wherein, S is a downlink signal received by the terminal, and is a downlink signal obtained after demodulation, and HW D is a channel response measured by the terminal on the downlink signal. It can be seen that since 1(^^)1 is a real number, it has no effect on the phase of the demodulated downlink signal, and when ^, ^ is not the same, (serving R f (serving as a complex number, then demodulating the terminal) There is a phase and amplitude deviation between the outgoing signal and the downlink signal transmitted by the base station, resulting in rotation and distortion of the constellation of the demodulated downlink signal.
据此， 本发明提供的信号发送方法， 在 TDD系统中， 由于上行信道的信 道响应 H与下行信道的信道响应 相同， 因此， 基站可以在上行信道上测量 信道响应 H , 从而根据在上行信道上测量信道响应 和公共参考信号的权值 Accordingly, according to the signal transmission method provided by the present invention, in the TDD system, since the channel response H of the uplink channel is the same as the channel response of the downlink channel, the base station can measure the channel response H on the uplink channel, thereby being based on the uplink channel. Measuring the channel response and the weight of the common reference signal
WR , 对波束形成权值 ^进行修正， 并进一步采用修正后的波束形成权值对发 送的下行信号进行波束形成， 来调整终端解调出的下行信号 中（H^f (H^ )的相位， 从而减小终端解调后的下行信号与实际下行信号之 间的相位差。 W R , correcting the beamforming weight ^, and further performing beamforming on the transmitted downlink signal by using the modified beamforming weight to adjust the downlink signal demodulated by the terminal Medium (H^f (H^) phase, thereby reducing the phase difference between the terminal demodulated downlink signal and the actual downlink signal.
终端接收到下行信号后， 由于该下行信号以修正后的波束形成权值进行 波束形成， 因此， 终端可以以下行公共参考信号为基准， 对下行信号进行解 调， 作为一种可行的实施方式， 终端可以根据 r = i¾^(H^ 对接收到的下  After receiving the downlink signal, the terminal performs beamforming on the downlink signal with the modified beamforming weight. Therefore, the terminal can demodulate the downlink signal by using the common reference signal as a reference, as a feasible implementation manner. The terminal can be based on r = i3⁄4^(H^ on the received
1(^ )1  1(^ )1
行信号进行解调。 其中， S为终端接收到的下行信号， r为终端解调后得到的 下行信号， H 为终端在下行公共参考信号上测量的信道响应， H 为终端在 下行信号上测量的信道响应。 由于终端解调出的下行信号 i^^r 中 The line signal is demodulated. S is the downlink signal received by the terminal, r is the downlink signal obtained by the terminal after demodulation, H is the channel response measured by the terminal on the downlink common reference signal, and H is the channel response measured by the terminal on the downlink signal. Due to the downlink signal demodulated by the terminal i^^r
(^) (^^)的相位已调整， 甚至（ ^ ) ( ^ )可以为实数， 因此， 降低了对 终端接收到的下行信号 s的相位产生影响，减小了解调后得到的下行信号与基 站才发送的下行信号之间的相位差。 需要说明的是， 对波束形成权值进行修正的同时， 实际上也可能包含了 对下行信号的幅度调制， 这对于下行信号涉及幅度调制的实施场景下， 也可 以减小终端解调后的下行信号与实际下行信号之间的幅度偏差。 The phase of (^) (^^) has been adjusted, even (^) (^) can be a real number. Therefore, the influence on the phase of the downlink signal s received by the terminal is reduced, and the downlink signal obtained after demodulation is reduced. The phase difference between the downlink signals transmitted by the base station. It should be noted that, when the beamforming weight is corrected, the amplitude modulation of the downlink signal may actually be included. In the implementation scenario where the downlink signal involves amplitude modulation, the downlink after demodulation of the terminal may also be reduced. The amplitude deviation between the signal and the actual downstream signal.
本发明实施例提供的信号接收方法， 基站侧根据检测的上行信道的信道 响应和公共参考信号的权值， 对波束形成权值进行修正。 终端接收到基站发 送的下行信号后， 以下行公共参考信号为基准对下行信号进行解调。 采用本 实施例提供的信号接收方法， 减小了终端解调后的下行信号与实际下行信号 之间的相位差。 作为一种可行的实施方式， 假设基站根据解调后的下行信号确定的波束 形成权值为^ , 基站在上行信道上测量的信道响应为 H , 下行公共参考信号 的权值为 ^ , 则基站修正后的波束形成权值可以为:
Figure imgf000011_0001
In the signal receiving method provided by the embodiment of the present invention, the base station side corrects the beamforming weight according to the channel response of the detected uplink channel and the weight of the common reference signal. After receiving the downlink signal sent by the base station, the terminal demodulates the downlink signal by using the following common reference signal as a reference. With the signal receiving method provided in this embodiment, the phase difference between the demodulated downlink signal and the actual downlink signal is reduced. As a feasible implementation manner, it is assumed that the beamforming weight determined by the base station according to the demodulated downlink signal is ^, and the channel response measured by the base station on the uplink channel is H, and the downlink common reference signal is The weight of the beam is ^, and the corrected beamforming weight of the base station can be:
Figure imgf000011_0001
其中， H为基站在上行信道上测量的信道响应， ^为下行公共参考信号 的权值， ^为所述波束形成权值， ^为幅度调整因子， 为标量， ^的取值在 HWR f至 |(H fl (HWR 之间， W为修正后的波束形成权值。 终端接收到下行信号之后，可以根据 r = 对下行信号进行解
Figure imgf000011_0002
Where H is the channel response measured by the base station on the uplink channel, ^ is the weight of the downlink common reference signal, ^ is the beamforming weight, ^ is the amplitude adjustment factor, is the scalar, and the value of ^ is in HW R f To |(H fl (between HW R , W is the corrected beamforming weight. After the terminal receives the downlink signal, it can solve the downlink signal according to r =
Figure imgf000011_0002
调， 其中， s为接收到的下行信号， r为解调后的下行信号， H^为终端在下 行公共参考信号上测量的信道响应， H 为终端在所述下行信号上测量的信 道响应。 ^ W = A , (服 D )" (服 Wd的实施场景下, 终端基于最大比合并解调出的 数据可以为:
Figure imgf000011_0003
In the s, where s is the received downlink signal, r is the demodulated downlink signal, H^ is the channel response measured by the terminal on the downlink common reference signal, and H is the channel response measured by the terminal on the downlink signal. ^ W = A , (service D )" (In the implementation scenario of Wd , the data demodulated by the terminal based on the maximum ratio can be:
Figure imgf000011_0003
在一种本实施例的实施场景下， 当 ^取 (H^〗时， 波束形成权值修
Figure imgf000011_0004
In an implementation scenario of this embodiment, when the ^H (H^) is used, the beamforming weight is repaired.
Figure imgf000011_0004
正前和波束形成权值修正后下行信号的发射功率是不变的， 因此， 对于下行 信号的发射功率是限制系统性能的决定性因素的实施场景下， 即对基站覆盖 范围要求较高的应用场景下， ^可以取 I (H^ γ (HWR
Figure imgf000011_0005
d时，终端解调后得到的下行信号与基站发射的 The transmit power of the downlink signal is unchanged after the correction of the front and the beamforming weights. Therefore, in the implementation scenario where the transmit power of the downlink signal is a decisive factor limiting the performance of the system, that is, an application scenario requiring high coverage of the base station Next, ^ can take I (H^ γ (HW R
Figure imgf000011_0005
d, the downlink signal obtained by the terminal after demodulation is transmitted by the base station
HWn (服。 HW n (service.
下行信号之间存在幅度偏差 , 如果基站对下行信号的调制不涉 及幅度调制， 那么这个幅度偏差不会影响终端解调后得到的下行信号， 但如 果基站对下行信号的调制涉及幅度调制， 则这个幅度偏差会对终端解调后得 到的下行信号造成一定影响。 因此， 如果基站对下行信号的调制不涉及幅度 调制 ,那么
Figure imgf000012_0001
如果基站对下行信号的调制涉及幅度调制 , 则 ^可以取 1^ ^2。 但当 ^取 Ι^^Γ时， 会影响下行信号的发射功率， 因此， 可以适用于对 于基站覆盖范围要求不高的应用场景。 There is an amplitude deviation between the downlink signals. If the modulation of the downlink signal by the base station does not involve amplitude modulation, then the amplitude deviation does not affect the downlink signal obtained by the terminal after demodulation, but if the modulation of the downlink signal by the base station involves amplitude modulation, then this The amplitude deviation will demodulate the terminal. The downlink signal to it has a certain impact. Therefore, if the modulation of the downlink signal by the base station does not involve amplitude modulation, then
Figure imgf000012_0001
If the base station downlink modulated signal involves an amplitude modulation, it may take ^ 1 ^ 2 ^. However, when the Ι^^Γ is used, the transmission power of the downlink signal is affected, and therefore, it can be applied to an application scenario where the coverage of the base station is not high.
在本实施例的另一种实施场景下， 如果基站采用发射分集方式发送下行 信号， 基站以正交方式同时发射两路信号， 终端可以利用两路信号的正交性 解出两路信号。 例如： 基站采用空时块编码方式（Space Time Block Code, STBC ) , 在连续两个时间片上发送正交的下行信号， 基站在第一个时间片上 发射的下行信号为 ， 在第二个时间片上发射的下行信号为 -4 。 则终端 在两个时间片上解调出的下行信号分别为：  In another implementation scenario of the embodiment, if the base station transmits the downlink signal by using the transmit diversity mode, and the base station simultaneously transmits two signals in an orthogonal manner, the terminal may use the orthogonality of the two signals to solve the two signals. For example, the base station uses the Space Time Block Code (STBC) to transmit orthogonal downlink signals on two consecutive time slices. The downlink signal transmitted by the base station on the first time slice is, on the second time slice. The downlink signal transmitted is -4. Then, the downlink signals demodulated by the terminal on two time slices are:
A  A
-5, + - -5, + -
1 I 2 1 I 2 2 1 I 2 1 I 2 2
A, , Α2 » 其中， 为终端在第一个时间片上解调出的下行信号， 2为终端在第二个 时间片上解调出的下行信号。 可以看出， 当 4 = |( ^)2,4 = |(^2^)2 , 则终端 可以通过^ +^，^ -^解出 ，两路正交的下行信号之间没有干扰，否则两路之 间在解调后相互之间仍存在干扰。 A, , Α 2 » where is the downlink signal demodulated by the terminal on the first time slice, and 2 is the downlink signal demodulated by the terminal on the second time slice. It can be seen that when 4 = |( ^) 2 , 4 = |(^ 2 ^) 2 , the terminal can be solved by ^ +^, ^ -^, there is no interference between the two orthogonal downlink signals, otherwise There is still interference between the two channels after demodulation.
综上所述， 幅度调整因子 ^可以根据基站的调制方式、 基站的覆盖范围 需求、 系统干扰情况以及基站发射下行信号的方式等确定， 作为一种可行的 实施方式， ^可以在 |(H^〗2到 |(H^)ff (H 之间选择，具体可以通过折中因子 In summary, the amplitude adjustment factor can be determined according to the modulation mode of the base station, the coverage requirement of the base station, the system interference situation, and the manner in which the base station transmits the downlink signal. As a feasible implementation manner, ^ can be in |(H^ 〗 2 to | (H ^) ff (select between H, specifically through the compromise factor
"来确定 ^的取值范围：
Figure imgf000012_0002
其中， "为折中因子， 取值在 0到 1之间， "可以根据下行信号的发射方 式、 调制方式或系统的发射功率需求等因素来确定。 "To determine the value range of ^:
Figure imgf000012_0002
Among them, "is a compromise factor, the value is between 0 and 1," can be determined according to factors such as the transmission mode of the downlink signal, the modulation mode or the transmission power requirement of the system.
在本实施例的一种实施场景下， 若对待发送的下行信号的调制不涉及幅 度调制， 则所述 "的取值可以趋近于 0, 即， "的取值可以无限接近于 0, 这 是由于在幅度上没有承载有用的信息， 因此， "的取值趋近于 0更能够提高 下行信号的发射功率， 从而有利于提升系统的下行信号接收性能， 有利于下 行信号的解调。 如果待发送的下行信号的调制涉及幅度调制， 则 "的取值可 以趋近于 1。 需要说明的是， 如果待发送的下行信号的调制涉及幅度调制， 则基站还可以进一步根据下行信号的发射功率对终端的解调或其他系统性能 指标的影响， 与下行信号的相位对终端的解调或其他系统性能指标的影响所 占的比重来确定 "的取值。 例如： 如果下行信号的发射功率对终端的解调或 其他系统性能指标的影响， 与下行信号的相位对终端的解调或其他系统性能 指标的影响可以以线性比例关系来衡量， 则当下行信号的发射功率对终端的 解调或其他系统性能指标的影响， 与下行信号的相位对终端的解调或其他系 统性能指标的影响大体相同时， "可以取 0.5。 可以理解的是， 下行信号的发 射功率对终端的解调或其他系统性能指标的影响， 与下行信号的相位对终端 的解调或其他系统性能指标的影响之间的比例关系可以由基站根据系统实际 情况来确定， 进而确定 "的取值 , 例如， "可以在 0.5- 1之间 , 从而避免终端 接收到的下行信号与导频之间在幅度上的偏差影响下行信号的解调质量。  In an implementation scenario of this embodiment, if the modulation of the downlink signal to be transmitted does not involve amplitude modulation, the value of the "can approach 0, that is, the value of "can be infinitely close to 0," Because the amplitude does not carry useful information, therefore, the value of "approximating to 0 can improve the transmission power of the downlink signal, thereby improving the downlink signal reception performance of the system and facilitating the demodulation of the downlink signal. The modulation of the downlink signal to be transmitted involves amplitude modulation, and the value of "can be approached to 1. It should be noted that, if the modulation of the downlink signal to be transmitted involves amplitude modulation, the base station may further influence the demodulation of the terminal or other system performance indicators according to the transmission power of the downlink signal, and the phase-to-terminal solution of the downlink signal. Determine the value of the impact of the impact of other system performance indicators. For example: If the transmit power of the downlink signal affects the demodulation of the terminal or other system performance indicators, and the phase-to-terminal demodulation of the downlink signal Or the impact of other system performance indicators can be measured in a linear proportional relationship, when the downlink signal's transmit power affects the terminal's demodulation or other system performance indicators, and the downlink signal's phase-to-terminal demodulation or other system performance indicators When the effects are roughly the same, "can take 0.5. It can be understood that the proportional relationship between the transmission power of the downlink signal on the demodulation of the terminal or other system performance indicators, and the influence of the phase of the downlink signal on the demodulation of the terminal or other system performance indicators may be determined by the base station according to the system. The actual situation is determined, and then the "value, for example," can be determined to be between 0.5 and 1, so as to avoid the deviation of the amplitude between the downlink signal received by the terminal and the pilot affecting the demodulation quality of the downlink signal.
在本实施例的另一种实施场景下， 若下行信号的发射功率是限制系统性 能的决定因素， 则 "的取值可以趋近于 0。 其中， 下行信号的发射功率是限制 系统性能的决定因素可以是， 下行信号的发射功率对终端接收下行信号或者 解调下行信号产生决定性的影响。 例如： 在终端离基站较远的实施场景下， 如果下行信号的发射功率较小， 那么终端接收到的下行信号可能很弱， 在这 种情况下终端甚至无法解调出下行信号， 因此， 在这种情况下， "的取值可 以趋近于 0, 以使下行信号的发射功率达到最大； 如果下行信号的发射功率 不是限制系统性能的决定因素， 则 "的取值可以趋近于 1。 具体的， 基站可以 根据下行信号的幅值与相位对系统性能的影响所占的比例等方面的因素来确 定 "的取值。 In another implementation scenario of this embodiment, if the transmit power of the downlink signal is a determining factor limiting system performance, the value of "the value may approach 0. Wherein, the transmit power of the downlink signal is a decision that limits system performance. The factor may be that the transmit power of the downlink signal has a decisive influence on the terminal receiving the downlink signal or demodulating the downlink signal. For example, in an implementation scenario where the terminal is far away from the base station, if the transmit power of the downlink signal is small, the terminal receives The downlink signal may be weak. In this case, the terminal cannot even demodulate the downlink signal. Therefore, in this case, "the value can be close to 0, so that the transmission power of the downlink signal is maximized; Downlink signal transmission power Instead of limiting the performance of the system, the value of "can be closer to 1. Specifically, the base station can determine the "according to the influence of the amplitude and phase of the downlink signal on the performance of the system." value.
在本实施例的又一种实施场景下， 若下行信号采用发射分集方式发送， 则 a的取值可以趋近于 1。  In another implementation scenario of this embodiment, if the downlink signal is transmitted in a transmit diversity manner, the value of a may approach 1.
作为另一种可行的实施方式， 如果基站对待发送的下行信号调制为单纯 的幅度调制， 则基站可以不考虑相位上的差异， 而只修正幅度误差， 则基站 其中， H为在上行
Figure imgf000014_0001
As another feasible implementation manner, if the downlink signal to be transmitted by the base station is modulated into simple amplitude modulation, the base station may correct the amplitude error regardless of the phase difference, and then the base station, where H is on the uplink.
Figure imgf000014_0001
信道上测量的信道响应， ^为下行公共参考信号的权值， 为波束形成权值， 为修正后的波束形成权值。 在这种实施场景下， 终端接收的下行信号中只 存在相位偏差， 而没有幅度偏差。 The channel response measured on the channel, ^ is the weight of the downlink common reference signal, which is the beamforming weight, which is the corrected beamforming weight. In this implementation scenario, there is only a phase offset in the downlink signal received by the terminal, and there is no amplitude deviation.
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流 程， 是可以通过计算机程序来指令相关的硬件来完成， 的程序可存储于一计 算机可读取存储介质中， 该程序在执行时， 可包括如上述各方法的实施例的 流程。其中，的存储介质可为磁碟、光盘、只读存储记忆体（ Read-Only Memory , ROM )或随机存储记忆体（Random Access Memory, RAM )等。  A person skilled in the art can understand that all or part of the process of implementing the above embodiment method can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium, and the program is executed. At the time, the flow of the embodiment of each method as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).
图 4为本发明提供的用于执行上述信号发送方法的基站一个实施例的结 构示意图， 如图 4所示， 该基站包括： 调制器 11、 处理器 12和发送器 13; 调制器 11 , 用于对待发送的下行信号进行调制；  4 is a schematic structural diagram of an embodiment of a base station for performing the foregoing signal sending method according to the present invention. As shown in FIG. 4, the base station includes: a modulator 11, a processor 12, and a transmitter 13; and a modulator 11 Modulating the downlink signal to be transmitted;
处理器 12, 根据调制后的下行信号确定波束形成权值， 并根据在上行信 道上测量的信道响应， 以及下行公共参考信号的权值， 对波束形成权值进行 修正；  The processor 12 determines a beamforming weight according to the modulated downlink signal, and corrects the beamforming weight according to the channel response measured on the uplink channel and the weight of the downlink common reference signal;
发送器 13 , 用于向终端发送调制后的下行信号， 调制后的下行信号采用 修正后的波束形成权值进行波束形成。  The transmitter 13 is configured to send the modulated downlink signal to the terminal, and the modulated downlink signal performs beamforming by using the modified beamforming weight.
本发明提供的用于执行上述信号发送方法的基站又一个是实施例中， 处 理器 12可以具体用于： 若所述调制器 11对待发送的下行信号的调制涉及相 位调制， 则根据 = 其中，
Figure imgf000015_0001
The base station provided by the present invention for performing the above signal transmission method is still another embodiment, The processor 12 may be specifically configured to: if the modulation of the downlink signal to be transmitted by the modulator 11 involves phase modulation, according to = where
Figure imgf000015_0001
H为在所述上行信道上测量的信道响应， WR为所述下行公共参考信号的权值， ^为所述波束形成权值， ^为幅度调整因子， ^的取值在 |(H )2至
Figure imgf000015_0002
， 为修正后的波束形成权值。 处理器 12还可以用于： 根据 = )ff(HH is the channel response measured on the uplink channel, W R is the weight of the downlink common reference signal, ^ is the beamforming weight, ^ is the amplitude adjustment factor, and the value of ^ is |(H) 2 to
Figure imgf000015_0002
, for the corrected beamforming weight. The processor 12 can also be used to: according to =) ff (H)
Figure imgf000015_0003
^确定幅度调 整因子 其中， "为折中因子， 取值在 0至 1之间， "根据下行信号的发射 方式、 调制方式或发射功率确定。
Figure imgf000015_0003
^ Determine the amplitude adjustment factor, where "is a compromise factor, the value is between 0 and 1," is determined according to the transmission mode, modulation mode or transmission power of the downlink signal.
处理器 12还可以用于： 若所述调制器 11对待发送的下行信号的调制不 涉及幅度调制， 则确定所述"的取值趋近于 0, 否则， 确定所述 "的取值趋近 于 1; 若所述调制器 11采用非幅度调制所述下行信号， 则确定所述"的取值 趋近于 0; 或者， 若所述发送器 13发射所述下行信号的功率是限制系统性能 的决定因素， 则所述 "的取值趋近于 0, 否则所述 "的取值趋近于 1; 或者， 若所述发送器 13采用发射分集方式发送所述下行信号， 则所述 "的取值趋近 于 1。  The processor 12 is further configured to: if the modulation of the downlink signal to be sent by the modulator 11 does not involve amplitude modulation, determine that the value of the "approaching is close to 0, otherwise, determining the value of the approach is approaching If the modulator 11 uses non-amplitude modulation of the downlink signal, it is determined that the value of the "negative value approaches 0; or, if the transmitter 13 transmits the power of the downlink signal, the system performance is limited. The determinant, the value of the "becomes close to 0, otherwise the value of the "approximate to 1"; or, if the transmitter 13 transmits the downlink signal by using transmit diversity, the " The value is close to 1.
进一步的， 处理器 12还可以用于： 若所述调制器 11对待发送的下行信 号的调制为幅度调制， 则根据 W = 对所述波束形成权值进行
Figure imgf000015_0004
Further, the processor 12 is further configured to: if the modulation of the downlink signal to be sent by the modulator 11 is amplitude modulation, perform the beamforming weight according to W=
Figure imgf000015_0004
修正， 其中， H为在所述上行信道上测量的信道响应， ^为所述下行公共参 考信号的权值， ^为所述波束形成权值， 为修正后的波束形成权值。 For example, where H is the channel response measured on the uplink channel, ^ is the weight of the downlink common reference signal, and ^ is the beamforming weight, which is the corrected beamforming weight.
本发明实施例提供的基站， 为本发明提供的信号发送方法的执行设备， 其执行信号发送方法的具体过程可参见信号发送方法的实施例， 再次不再赘 述。  The base station provided by the embodiment of the present invention is an execution device of the signal sending method provided by the present invention. For the specific process of the method for transmitting the signal, refer to the embodiment of the signal sending method, which is not described again.
本发明实施例提供的基站， 根据在上行信道上测量的信道响应和公共参 考信号的权值， 对波束形成权值进行修正， 从而减小终端解调后的下行信号 与实际下行信号之间的相位差。 The base station provided by the embodiment of the present invention is based on the channel response and the common parameter measured on the uplink channel. The weight of the test signal is modified to correct the beamforming weight, thereby reducing the phase difference between the demodulated downlink signal and the actual downlink signal.
图 5为本发明提供的用于执行上述信号接收方法的终端一个实施例的结 构示意图， 如图 5所示， 该终端包括： 接收器 21和解调器 22;  FIG. 5 is a schematic structural diagram of an embodiment of a terminal for performing the foregoing signal receiving method according to the present invention. As shown in FIG. 5, the terminal includes: a receiver 21 and a demodulator 22;
接收器 21 , 用于接收基站发送的下行信号， 下行信号采用修正后的波束 形成权值进行波束形成， 其中， 修正后的波束形成权值由基站根据在上行信 道上测量的信道响应以及下行公共参考信号的权值， 对调制后的下行信号确 定的波束形成权值进行修正获取；  The receiver 21 is configured to receive a downlink signal sent by the base station, where the downlink signal uses the modified beamforming weight to perform beamforming, where the modified beamforming weight is determined by the base station according to the channel response measured on the uplink channel and the downlink common Correcting the beamforming weight determined by the modulated downlink signal by using the weight of the reference signal;
解调器， 用于以下行公共参考信号为基准， 对下行信号进行解调。  The demodulator is used for demodulating the downlink signal based on the following common reference signal.
作为一种可行的实施方式， 解调器 22 可以具体用于： 根据 r = 服 2 (H 对下行信号进行解调, 其中， s为接收到的下行信号， r为解 |( As a feasible implementation manner, the demodulator 22 may be specifically configured to: according to r = service 2 (H demodulate the downlink signal, where s is the received downlink signal, r is the solution |
调后的下行信号， H^为终端在下行公共参考信号上测量的信道响应， HW为 终端在下行信号上测量的信道响应。 The adjusted downlink signal, H^ is the channel response measured by the terminal on the downlink common reference signal, and HW is the channel response measured by the terminal on the downlink signal.
本发明实施例提供的终端， 为本发明提供的信号接收方法的执行设备， 其执行信号接收方法的具体过程可参见信号接收方法的实施例， 再次不再赘 述。  The terminal provided by the embodiment of the present invention is an execution device of the signal receiving method provided by the present invention. For the specific process of the signal receiving method, refer to the embodiment of the signal receiving method, which is not described again.
本发明实施例提供的终端， 基站侧根据在上行信道测量的信道响应和公 共参考信号的权值， 对波束形成权值进行修正， 能够减小终端解调后的下行 信号与实际下行信号之间的相位差。  According to the terminal provided by the embodiment of the present invention, the base station side corrects the beamforming weight according to the channel response measured on the uplink channel and the weight of the common reference signal, and can reduce the downlink signal between the terminal and the actual downlink signal. The phase difference.
图 6为本发明提供的用于执行上述信号发送方法和信号接收方法的信号 收发系统一个实施例的结构示意图， 如图 6所示， 该信号收发提供包括基站 1和终端 2;  Figure 6 is a schematic structural diagram of an embodiment of a signal transceiving system for performing the above-mentioned signal transmitting method and signal receiving method, as shown in Figure 6, the signal transceiving provides base station 1 and terminal 2;
基站 1用于： 对待发送的下行信号进行调制； 根据调制后的下行信号确 定波束形成权值； 根据在上行信道上测量的信道响应， 以及下行公共参考信 号的权值， 对波束形成权值进行修正； 向终端发送调制后的下行信号， 调制 后的下行信号采用修正后的波束形成权值进行波束形成； The base station 1 is configured to: modulate a downlink signal to be transmitted; determine a beamforming weight according to the modulated downlink signal; perform beamforming weight according to a channel response measured on the uplink channel, and a weight of the downlink common reference signal Correction; transmitting modulated downlink signal to the terminal, modulation The subsequent downlink signal is beamformed using the corrected beamforming weight;
终端 2用于： 接收基站发送的下行信号， 下行信号采用修正后的波束形 成权值进行波束形成， 修正后的波束形成权值由基站根据在上行信道上测量 的信道响应， 以及下行公共参考信号的权值， 对调制后的下行信号确定的波 束形成权值进行修正获取； 以下行公共参考信号为基准， 对下行信号进行解 调。  The terminal 2 is configured to: receive a downlink signal sent by the base station, where the downlink signal uses the modified beamforming weight to perform beamforming, and the modified beamforming weight is determined by the base station according to the channel response measured on the uplink channel, and the downlink common reference signal. The weight value is used to correct the beamforming weight determined by the modulated downlink signal; the following common reference signal is used as a reference to demodulate the downlink signal.
本发明实施例提供的信号收发系统， 基站侧可以根据在上行信道上测量 的信道响应和公共参考信号的权值， 对波束形成权值进行修正， 从而减小终 端解调后的下行信号与实际下行信号之间的相位差。  In the signal transceiving system provided by the embodiment of the present invention, the base station side may modify the beamforming weight according to the channel response measured on the uplink channel and the weight of the common reference signal, thereby reducing the downlink signal and the actual demodulation of the terminal. The phase difference between the downstream signals.
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。  It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

权 利 要求 Rights request
1、 一种信号发送方法， 其特征在于， 包括：  A method for transmitting a signal, comprising:
对待发送的下行信号进行调制；  Modulating the downlink signal to be transmitted;
根据调制后的下行信号确定波束形成权值；  Determining a beamforming weight according to the modulated downlink signal;
根据在上行信道上测量的信道响应， 以及下行公共参考信号的权值， 对 所述波束形成权值进行修正；  Correcting the beamforming weight according to a channel response measured on the uplink channel and a weight of the downlink common reference signal;
向终端发送调制后的下行信号， 所述调制后的下行信号采用修正后的波 束形成权值进行波束形成。  The modulated downlink signal is transmitted to the terminal, and the modulated downlink signal is beamformed using the corrected beamforming weight.
2、 根据权利要求 1所述的方法， 其特征在于， 若对待发送的下行信号的 调制涉及相位调制， 则所述根据在上行信道上测量的信道响应， 以及下行公 共参考信号的权值， 对所述波束形成权值进行修正， 具体为： 根据 = (HW^H (HW^ ^对所述波束形成权值进行修正, 其中， H为 2. The method according to claim 1, wherein if the modulation of the downlink signal to be transmitted involves phase modulation, the channel response measured according to the uplink channel and the weight of the downlink common reference signal, The beamforming weight is modified, specifically: correcting the beamforming weight according to = ( HW ^ H ( HW ^ ^, where H is
(HWD )H (HWR )\ 在所述上行信道上测量的信道响应， ^为所述下行公共参考信号的权值， WD 为所述波束形成权值， ^为幅度调整因子， ^的取值在 KH^ 2至
Figure imgf000018_0001
(HW D ) H (HW R )\ the channel response measured on the uplink channel, ^ is the weight of the downlink common reference signal, W D is the beamforming weight, and ^ is the amplitude adjustment factor, ^ The value is in KH^ 2 to
Figure imgf000018_0001
之间， 为修正后的波束形成权值。 Between, the corrected beamforming weights.
3、 根据权利要求 2所述的方法， 其特征在于， 所述根据在上行信道上测 量的信道响应， 以及下行公共参考信号的权值， 对所述波束形成权值进行修 正之前， 还包括：  The method according to claim 2, wherein, before the correcting the beamforming weight according to the channel response measured on the uplink channel and the weight of the downlink common reference signal, the method further includes:
根据 ^ = «|( ^ )2 + (1 - «)^^Π ^ 确定所述幅度调整因子 其中， a 为折中因子， 取值在 0至 1之间， 所述 "根据所述下行信号的发射方式、 调 制方式或发射功率确定。 Determining the amplitude adjustment factor according to ^ = «|( ^ ) 2 + (1 - «)^^Π ^, where a is a compromise factor, and the value is between 0 and 1, according to the downlink signal The transmission mode, modulation mode or transmission power is determined.
4、 根据权利要求 3所述的方法， 其特征在于， 若对待发送的下行信号的 调制不涉及幅度调制， 则所述"的取值趋近于 0, 否则， 所述"的取值趋近于 1 ; 或者，若所述下行信号的发射功率是限制系统性能的决定因素，则所述" 的取值趋近于 0 , 否则所述 "的取值趋近于 1 ; The method according to claim 3, wherein if the modulation of the downlink signal to be transmitted does not involve amplitude modulation, the value of the "approximate to 0, otherwise, the value of the "approximation" approaches At 1; Alternatively, if the transmit power of the downlink signal is a determining factor that limits system performance, the value of the "closes to 0, otherwise the value of the "closes" approaches 1;
或者，若所述下行信号采用发射分集方式发送，则所述"的取值趋近于 1。  Alternatively, if the downlink signal is transmitted in a transmit diversity manner, the value of the "approximate to 1.
5、 根据权利要求 1所述的方法， 其特征在于， 若对待发送的下行信号的 调制为幅度调制， 则所述根据在上行信道上测量的信道响应， 以及下行公共 参考信号的权值， 对所述波束形成权值进行修正， 具体为： 根据 = 对所述波束形成权值进行修正， 其中， H为在
Figure imgf000019_0001
The method according to claim 1, wherein if the modulation of the downlink signal to be transmitted is amplitude modulation, the channel response measured according to the uplink channel and the weight of the downlink common reference signal, The beamforming weight is modified, specifically: correcting the beamforming weight according to = , where H is
Figure imgf000019_0001
所述上行信道上测量的信道响应， ^为所述下行公共参考信号的权值， WD为 所述波束形成权值， ^为修正后的波束形成权值。 The channel response measured on the uplink channel, ^ is the weight of the downlink common reference signal, W D is the beamforming weight, and ^ is the corrected beamforming weight.
6、 一种信号接收方法， 其特征在于， 包括：  6. A signal receiving method, comprising:
接收基站发送的下行信号， 所述下行信号采用修正后的波束形成权值进 行波束形成， 其中， 所述修正后的波束形成权值由所述基站根据在上行信道 上测量的信道响应以及下行公共参考信号的权值， 对调制后的下行信号确定 的波束形成权值进行修正获取；  Receiving a downlink signal sent by the base station, where the downlink signal is beamformed by using a modified beamforming weight, wherein the corrected beamforming weight is determined by the base station according to a channel response measured on an uplink channel and a downlink common Correcting the beamforming weight determined by the modulated downlink signal by using the weight of the reference signal;
以所述下行公共参考信号为基准， 对所述下行信号进行解调。  Demodulating the downlink signal based on the downlink common reference signal.
7、 根据权利要求 6所述的方法， 其特征在于， 所述以所述下行公共参考 信号为基准， 对所述下行信号进行解调， 具体为： 根据 r = 对所述下行信号进行解调 , 其中， s为接收到的下
Figure imgf000019_0002
The method according to claim 6, wherein the downlink signal is demodulated based on the downlink common reference signal, specifically: demodulating the downlink signal according to r = , where s is received
Figure imgf000019_0002
行信号， r为解调后的下行信号， H^为终端在所述下行公共参考信号上测量 的信道响应， H 为所述终端在所述下行信号上测量的信道响应。 The row signal, r is the demodulated downlink signal, H^ is the channel response measured by the terminal on the downlink common reference signal, and H is the channel response measured by the terminal on the downlink signal.
8、 一种基站， 其特征在于， 包括：  8. A base station, comprising:
调制器， 用于对待发送的下行信号进行调制；  a modulator for modulating a downlink signal to be transmitted;
处理器， 用于根据调制后的下行信号确定波束形成权值， 并根据在上行 信道上测量的信道响应， 以及下行公共参考信号的权值， 对所述波束形成权 值进行修正； a processor, configured to determine a beamforming weight according to the modulated downlink signal, and perform the beam forming right according to the channel response measured on the uplink channel and the weight of the downlink common reference signal The value is corrected;
发送器， 用于向终端发送调制后的下行信号， 所述调制后的下行信号采 用修正后的波束形成权值进行波束形成。  And a transmitter, configured to send the modulated downlink signal to the terminal, where the modulated downlink signal uses the corrected beamforming weight to perform beamforming.
9、 根据权利要求 8所述的基站， 其特征在于， 所述处理器具体用于： 若 所述调制器对待发送的下行信号的调制涉及相位调制， 则根据  The base station according to claim 8, wherein the processor is specifically configured to: if the modulation of the downlink signal to be transmitted by the modulator involves phase modulation, according to
W = 对所述波束形成权值进行修正, 其中， H为在所述上
Figure imgf000020_0001
W = correcting the beamforming weight, where H is on the
Figure imgf000020_0001
行信道上测量的信道响应， ^为所述下行公共参考信号的权值， ^为所述波 束形成权值， ^为幅度调整因子， ^的取值在 |(H^〗2至 |(H^f(HF^之间， W 为修正后的波束形成权值。 The channel response measured on the line channel, ^ is the weight of the downlink common reference signal, ^ is the beamforming weight, ^ is the amplitude adjustment factor, and the value of ^ is | (H^ 〗 2 to | (H) ^f (between HF^, W is the corrected beamforming weight.
10、 根据权利要求 9所述的基站， 其特征在于， 所述处理器还用于： 根 据 ^ = «|^^)2 +(1_«)|^^ (H ^确定所述幅度调整因子 其中， "为折中 因子， 取值在 0至 1之间， 所述 "根据所述下行信号的发射方式、 调制方式 或发射功率确定。 The base station according to claim 9, wherein the processor is further configured to: determine the amplitude adjustment factor according to ^ = «|^^) 2 + (1_«)|^^ (H ^ " is a compromise factor, and the value is between 0 and 1, which is determined according to the transmission mode, modulation mode or transmission power of the downlink signal.
11、 根据权利要求 10所述的基站， 其特征在于， 所述处理器还用于： 若 所述调制器对待发送的下行信号的调制不涉及幅度调制， 则确定所述 "的取 值趋近于 0, 否则， 确定所述"的取值趋近于 1 ; 若所述调制器采用非幅度调 制所述下行信号， 则确定所述"的取值趋近于 0;  The base station according to claim 10, wherein the processor is further configured to: if the modulation of the downlink signal to be transmitted by the modulator does not involve amplitude modulation, determine that the value of the approach approaches 0, otherwise, determining that the value of "approxes to 1; if the modulator uses non-amplitude modulation of the downlink signal, it is determined that the value of the "approximate to 0;
或者， 若所述发送器发射所述下行信号的功率是限制系统性能的决定因 素， 则所述 "的取值趋近于 0, 否则所述 "的取值趋近于 1 ;  Alternatively, if the power of the downlink signal transmitted by the transmitter is a determinant of limiting system performance, the value of the "proximity is close to 0, otherwise the value of the "the value" approaches 1;
或者， 若所述发送器采用发射分集方式发送所述下行信号， 则所述 "的 取值趋近于 1。  Alternatively, if the transmitter transmits the downlink signal by using transmit diversity, the value of the "approximate to 1.
12、 根据权利要求 8所述的基站， 其特征在于， 所述处理器具体用于： 若所述调制器对待发送的下行信号的调制为幅度调制， 则根据 w = ^ t¾—— 对所述波束形成权值进行修正， 其中， H为在所述上行 (HWD)H (HWR )\ 信道上测量的信道响应， ^为所述下行公共参考信号的权值， ^为所述波束 形成权值， W为修正后的波束形成权值。 The base station according to claim 8, wherein the processor is specifically configured to: if the modulation of the downlink signal to be transmitted by the modulator is amplitude modulation, according to w = ^ t3⁄4 - correcting the beamforming weight, where H is the channel response measured on the uplink (HW D ) H (HW R )\ channel, ^ is the downlink common reference signal The weight, ^ is the beamforming weight, and W is the corrected beamforming weight.
13、 一种终端， 其特征在于， 包括：  13. A terminal, comprising:
接收器， 用于接收基站发送的下行信号， 所述下行信号采用修正后的波 束形成权值进行波束形成， 其中， 所述修正后的波束形成权值由所述基站根 据在上行信道上测量的信道响应以及下行公共参考信号的权值， 对调制后的 下行信号确定的波束形成权值进行修正获取；  a receiver, configured to receive a downlink signal sent by the base station, where the downlink signal uses a modified beamforming weight to perform beamforming, where the corrected beamforming weight is measured by the base station according to the uplink channel a channel response and a weight of the downlink common reference signal, and correcting and acquiring the beamforming weight determined by the modulated downlink signal;
解调器， 用于以所述下行公共参考信号为基准， 对所述下行信号进行解 调。  And a demodulator, configured to demodulate the downlink signal based on the downlink common reference signal.
14、 根据权利要求 13所述的终端， 其特征在于， 所述解调器具体用于： 根据 r = 对所述下行信号进行解调 , 其中， s为接收到的下行信
Figure imgf000021_0001
The terminal according to claim 13, wherein the demodulator is specifically configured to: demodulate the downlink signal according to r =, where s is a received downlink message
Figure imgf000021_0001
号， r为解调后的下行信号， H^为终端在所述下行公共参考信号上测量的信 道响应， HW为所述终端在所述下行信号上测量的信道响应。 No. r is a demodulated downlink signal, H^ is a channel response measured by the terminal on the downlink common reference signal, and HW is a channel response measured by the terminal on the downlink signal.
15、 一种信号收发系统， 其特征在于， 包括权利要求 8-12任一项所述的 基站和权利要求 13或 14所述的终端。  A signal transceiving system, comprising the base station according to any one of claims 8 to 12 and the terminal according to claim 13 or 14.
PCT/CN2011/084545 2011-12-23 2011-12-23 Signal transmitting and receiving method, device and signal transmitting/receiving system WO2013091242A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2011/084545 WO2013091242A1 (en) 2011-12-23 2011-12-23 Signal transmitting and receiving method, device and signal transmitting/receiving system
CN201180070912.0A CN103563265B (en) 2011-12-23 2011-12-23 Signal sending, receiving method, equipment and signal receiving and transmitting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2011/084545 WO2013091242A1 (en) 2011-12-23 2011-12-23 Signal transmitting and receiving method, device and signal transmitting/receiving system

Publications (1)

Publication Number Publication Date
WO2013091242A1 true WO2013091242A1 (en) 2013-06-27

Family

ID=48667687

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2011/084545 WO2013091242A1 (en) 2011-12-23 2011-12-23 Signal transmitting and receiving method, device and signal transmitting/receiving system

Country Status (2)

Country Link
CN (1) CN103563265B (en)
WO (1) WO2013091242A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102273091A (en) * 2008-11-03 2011-12-07 爱立信电话股份有限公司 Method for transmission of reference signals and determination of precoding matrices for multi-antenna transmission

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004096346A (en) * 2002-08-30 2004-03-25 Fujitsu Ltd Radio communication equipment
CN101383651B (en) * 2008-10-24 2012-02-15 西北工业大学 Near field time domain beam forming method suitable for wideband signal
CN102082594B (en) * 2009-11-30 2013-09-11 华为技术有限公司 Beamforming method and device, and transmitting system
CN102111203B (en) * 2011-03-04 2013-11-06 西安交通大学 Method for forming eigen-beam based on time and frequency domain pre-treatment in TD-LTE (time division duplex-Long Term Evolution) system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102273091A (en) * 2008-11-03 2011-12-07 爱立信电话股份有限公司 Method for transmission of reference signals and determination of precoding matrices for multi-antenna transmission

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NTT DOCOMO ET AL.: "Adaptive Beamforming in E-UTRA", 3GPP TSG RAN WG1 MEETING #48, 16 February 2007 (2007-02-16), ST. LOUIS, USA *

Also Published As

Publication number Publication date
CN103563265B (en) 2016-08-24
CN103563265A (en) 2014-02-05

Similar Documents

Publication Publication Date Title
US10148331B2 (en) Method and apparatus for tracking beam in wireless communication system
JP6297720B2 (en) Method and apparatus for orientation-based beam selection
US11165476B2 (en) Adaptation of MIMO mode in MMW WLAN systems
CN112771395A (en) System and method for determining line of sight (LOS)
US10153859B2 (en) Mobile communication system, communication control method, base station superposing an interference replica signal to a desired wave signal, and user terminal performing interference cancellation
KR102290826B1 (en) Message transmission based on the determined beam configuration
CN113169853B (en) Transmit/receive beam association in millimeter wave V2X
EP3815283B1 (en) Positioning reference signal transmission with controlled transmission power and bandwidth
WO2020092766A1 (en) Uplink timing compensation
US11652533B2 (en) Resource-efficient beam selection in 5G and 6G
JP4237668B2 (en) Wireless communication system, base station apparatus, and transmission power control method
WO2021126495A1 (en) Joint channel state information for virtual user equipment
EP3257108B1 (en) Microwave radio transmitter and receiver for polarization misalignment compensation
JP6940489B2 (en) Base stations and wireless terminals
WO2013091242A1 (en) Signal transmitting and receiving method, device and signal transmitting/receiving system
US20220361004A1 (en) Methods and Apparatus for Transmitting Synchronization Signals
WO2019157672A1 (en) Control information receiving method and apparatus, control information transmitting method and apparatus, and communication system
WO2023129599A2 (en) Clustered coherent distributed spatial multiplexing in wireless communication networks
JP2009089413A (en) Radio communication system, base station device and transmission power control method

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11877959

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 11877959

Country of ref document: EP

Kind code of ref document: A1