WO2011153698A1 - 多天线波束成型系统中接收链路的校准方法、装置及系统 - Google Patents
多天线波束成型系统中接收链路的校准方法、装置及系统 Download PDFInfo
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- WO2011153698A1 WO2011153698A1 PCT/CN2010/073742 CN2010073742W WO2011153698A1 WO 2011153698 A1 WO2011153698 A1 WO 2011153698A1 CN 2010073742 W CN2010073742 W CN 2010073742W WO 2011153698 A1 WO2011153698 A1 WO 2011153698A1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/267—Phased-array testing or checking devices
Definitions
- the present invention relates to the field of communications, and in particular, to a method, device and system for calibrating a receiving link in a multi-antenna beamforming system.
- Multi-antenna beamforming systems such as smart antenna systems, MIMO (Mul t iple-input Mul t iple-output, input and output) systems, and active antenna systems, all use multiple receive links on different links.
- the amplitude phase is adjusted, and the received multi-channel signals are superimposed in the digital domain to form different spatial beams.
- the spatial beam since there are more active and passive circuits, local oscillators, and microstrip transmission lines on each receiving link, signals transmitted on the receiving link are inevitable. There is a phase difference, so that the delay, amplitude, and phase of each receiving link are different.
- the delay, amplitude, and phase difference of the receiving link are not calibrated and compensated, the combined combined signal in the digital domain will not be as expected.
- the direction of the in-phase superposition and out-of-phase cancellation does not form the expected reception pattern.
- the calibration of the receive link in a multi-antenna system is a prerequisite for the multi-antenna beamforming system to receive beamforming for normal operation.
- the receiving link in the multi-antenna beamforming system, which is specifically: generally transmitting one far below the service link
- the signal plus noise detection signal for example, the detection signal is lower than the service channel noise - 20dB, which is generally a PN (random no ise) signal; the detection signal is divided into multiple signals by a 1-point multi-channel splitter.
- Each signal is coupled to a receiving link by a directional coupler; and then the delay and amplitude of each transmitting channel are detected by a sliding correlation matching method with the transmitted detecting signal at the receiving end of the digital domain of each receiving link.
- Phase Phase.
- the inventors have found that at least the following disadvantages exist in the prior art, including: the detected signal to be transmitted needs to be coupled into the service signal band through the directional coupler, Cause interference with business signals. Summary of the invention
- Embodiments of the present invention provide a method, apparatus, and system for calibrating a receive link in a multi-antenna beamforming system that do not interfere with traffic signals during calibration of the receive link.
- a method for calibrating a receive link in a multi-antenna beamforming system comprising:
- the signal comprising at least a calibration signal, wherein the calibration signal is a tone signal sent by the local oscillator at a boundary position of two adjacent service carriers; performing the calibration signal Correlation operation, obtaining an amplitude relative difference, a phase relative difference, and a delay relative difference between each receiving link and a reference receiving link, where the reference receiving link is any one of the multiple receiving links Receiving link
- the delay value is consistent with the amplitude value, the phase value, and the delay value of the reference receiving link; and the amplitude value, the phase value, and the delay value that are consistent with each other are respectively calculated according to the corresponding digital beamforming coefficients. , get the combined calibration signal after digital beamforming.
- a calibration device for a receive link in a multi-antenna beamforming system comprising:
- a receiving unit configured to receive a signal of a plurality of receiving links, where the signal includes at least a calibration signal, where the calibration signal is a tone signal sent by a local oscillator at a boundary position of two adjacent service carriers;
- a correlation operation unit configured to perform a correlation operation on the calibration signal received by the receiving unit, and obtain an amplitude relative difference, a phase relative difference, and a delay relative difference between each receiving link and a reference receiving link.
- the reference receiving link is a receiving link of any one of the multiple receiving links;
- a first adjusting unit configured to adjust, according to the amplitude relative difference, the phase relative difference, and the delay relative difference of each receiving link, respectively, the amplitude, the phase, and the delay of each receiving link, The amplitude value, the phase value, and the delay value of each receiving link and the amplitude value of the reference receiving link, The phase value and the delay value are consistent;
- an operation unit configured to calculate, according to the digital beamforming coefficients corresponding to the corresponding amplitude, phase, and delay values obtained by the first adjusting unit, to obtain a combined beam calibration signal after digital beamforming .
- a calibration system for a receive link in a multi-antenna beamforming system comprising a calibration device for a receive link in a system controller, a local oscillator, a coupler, and a multi-antenna beamforming system;
- the system controller is configured to, when the calibration link in the multi-antenna beamforming system needs to be calibrated, control the local oscillator to issue a calibration signal, where the calibration signal is a single frequency whose frequency is located at a boundary position of two adjacent service carriers. Tone signal
- the coupler is configured to feed the calibration signal into a receiving link, and at least the calibration signal is included in a signal received by the receiving link;
- a calibration device for receiving a link in the multi-antenna beamforming system, configured to receive signals of a plurality of receiving links, where the signal includes at least the calibration signal; performing correlation operations on the calibration signals to obtain respective receiving links a relative amplitude difference, a phase relative difference, and a delay relative difference between the reference receiving link, the reference receiving link being any one of the plurality of receiving links; Amplitude difference, phase relative difference, and delay relative difference of the receiving link, respectively adjusting the amplitude, phase, and delay of each receiving link, so that the amplitude value, phase value, and delay of each channel The value is consistent with the amplitude value, the phase value, and the delay value of the reference receiving link; and the amplitude, phase, and delay values that are consistent with each other are respectively calculated by the corresponding digital beamforming coefficients to obtain a number Combined calibration signal after beamforming.
- the calibration signal used is a single tone sent by the local oscillator whose frequency is located at the boundary position of two adjacent service carriers.
- the signal which is not in the signal band of the traffic signal, thus does not interfere with the traffic signal during the calibration of the receive link.
- FIG. 1 is a flow chart showing a calibration method of a receiving link in a multi-antenna beamforming system according to Embodiment 1 of the present invention
- FIG. 2 is a flow chart showing a calibration method of a receiving link in a multi-antenna beamforming system according to Embodiment 2 of the present invention
- FIG. 3 is a block diagram showing the composition of a calibration apparatus for a receiving link in a multi-antenna beamforming system according to Embodiment 3 of the present invention
- FIG. 4 is a block diagram showing the composition of a calibration apparatus for a receiving link in another multi-antenna beamforming system according to Embodiment 3 of the present invention.
- FIG. 5 is a block diagram showing the composition of a calibration apparatus for a receiving link in another multi-antenna beamforming system according to Embodiment 3 of the present invention.
- Figure 6 is a block diagram showing the composition of a calibration system for a receiving link in a multi-antenna beamforming system according to Embodiment 3 of the present invention.
- the embodiment of the invention provides a calibration method for a receiving link in a multi-antenna beamforming system. As shown in FIG. 1, the method includes:
- a plurality of receiving links receive signals, the signals including at least a calibration signal, the calibration signals including a tone signal sent by a local oscillator at a boundary position of two adjacent service carriers.
- the system controller controls the local oscillator to issue the calibration signal, and the coupler feeds the calibration signal into the In a plurality of receiving links; while the calibration signal is being sent, multiple receiving links in the system may be receiving service signals or may be in an idle state; when the receiving link is receiving service signals, The signal received by the receiving link includes a service signal and the calibration signal; when the receiving link is in an idle state, the signal received by the receiving link only includes a calibration signal; therefore, the multiple receiving links receive The arriving signal contains at least the calibration signal.
- each receiving link Adjusts amplitude, phase, and delay of each receiving link according to amplitude relative difference, phase relative difference, and delay relative difference of each receiving link, so as to obtain amplitude values of the receiving links.
- the phase value and the delay value are consistent with the amplitude value, the phase value, and the delay value of the reference receiving link.
- the calibration signal used is a single tone sent by the local oscillator whose frequency is located at the boundary between two adjacent service carriers.
- the signal which is not in the signal band of the service signal, does not interfere with the service signal, and does not interfere with the service signal during the calibration of the receiving link.
- the embodiment of the invention provides a calibration method for a receiving link in a multi-antenna beamforming system. As shown in FIG. 2, the method includes:
- a plurality of receiving links receive signals, where the signals include at least a calibration signal, where the calibration signals include a frequency signal sent by a local oscillator at a boundary position of two adjacent service carriers. No., and the power of the calibration signal is 20 dB higher than the low noise of the receiving link.
- the system controller controls the local oscillator to issue the calibration signal, and the coupler feeds the calibration signal into the In a plurality of receiving links; while the calibration signal is being sent, multiple receiving links in the system may be receiving service signals or may be in an idle state; when the receiving link is receiving service signals, The signal received by the receiving link includes a service signal and the calibration signal; when the receiving link is in an idle state, the signal received by the receiving link only includes a calibration signal; therefore, the multiple receiving links receive The arriving signal contains at least the calibration signal.
- the power of the calibration signal transmitted by the coupler into the air by the coupler is the same as the noise floor, and does not cause spurious interference to other systems, so the power of the calibration signal is set to be higher than the receiving chain.
- the low noise of the road is 20 dB higher; in the specific implementation, the power of the calibration signal may have an error of up and down ldB.
- the signal received by the multiple receiving links in step 201 does not only include the calibration signal, it may also include a service signal, so it is necessary to filter signals other than the calibration signal before performing correlation operations on the calibration signal. Drop it.
- the device that performs the step may be a high-pass filter, which is not limited by the embodiment of the present invention. Any device that can implement the function in the prior art may be used in the step of the embodiment of the present invention.
- the following steps may be used, including: Performing a correlation operation on the calibration signal corresponding to the link, obtaining an amplitude peak value of the calibration signal; acquiring amplitude values, phase values, and delay values corresponding to each receiving link and the reference receiving link according to the amplitude peak value of the calibration signal; The amplitude value, phase value, and delay value of each receiving link are respectively Subtracting the amplitude value, the phase value, and the delay value of the reference receiving link to obtain an amplitude difference, a phase difference, and a delay difference of each of the receiving links and the reference receiving link.
- the device that performs the steps of the embodiment of the present invention may be a sliding correlator, but the embodiment of the present invention is not limited.
- the device that can implement the function in the prior art can be used in the step of the embodiment of the present invention.
- the delay value of the phase shifter to the coupler is small, the delay value of the link between the phase shifter and the coupler may be ignored in a specific implementation.
- step 208 is performed; if the combined calibration signal is detected, the power is greater than the receiving link. If the single-channel power is lower than 20dB, the power of the combined calibration signal is kept unchanged.
- the adjusting the power of the combined calibration signal so that the power of the combined calibration signal is lower than the single-channel power of the receiving link by 20 dB or less may specifically be: adjusting the receiving links
- the phase is such that the power of the combined calibration signal is less than 20 dB below the single-channel power of the receiving link.
- the step of the embodiment of the present invention may be completed by a phase shifter. After adjusting the phase of the receiving links, the phase shifter makes the combined effect of the phase shifter phase plus the DBF phase lower than the maximum value of the calibration signal. More than 20dB;
- the range of phase shifter adjustment can be simulated offline, the data is stored, and the configured DBF parameters are used for searching.
- the system records the phase values of the phase shifters for compensation data for the next calibration.
- the calibration signal used is a tone signal sent by the local oscillator, and the frequency is located at the boundary of two adjacent service carriers. Position, and the power is 20 dB higher than the low noise of the receiving link, the calibration signal is not in the signal band of the traffic signal, and therefore does not interfere with the traffic signal; and when the power of the synthesized calibration signal is adjusted, It is realized by adjusting the phase of each receiving link, and therefore does not interfere with the traffic signal.
- the calibration signal used in the example of the present invention does not interfere with the service signal, the power of the calibration signal does not need to be adjusted when the service signal fluctuates, thereby eliminating the corresponding device for detecting whether the power of the service signal is changed, and controlling the calibration signal.
- the device whose power changes as the power of the traffic signal changes simplifies the calibration process for the receive link and saves hardware cost and size.
- the calibration signal used in the embodiment of the present invention does not interfere with the service signal, it is not necessary to control the power of the check signal to be low, so that the time required for calibration of the receiving link is greater than that of the existing method. Shorter than the order of magnitude; and because the calibration method of the present invention requires a short time, generally less than the response time of A-AGC (Analogus Automa tic Ga in Control), A-AGC for the receiving link Does not constitute an impact.
- A-AGC Analogus Automa tic Ga in Control
- the calibration signal of the embodiment of the present invention is a single tone signal sent by the local oscillator, and does not need to transmit a modulation calibration signal, thereby eliminating the corresponding baseband modulation signal generation, DAC (Dig i ta l-to-Ana log Conver ter , digital-to-analog converters, transmitters and other transmit link devices; saves hardware cost and size.
- DAC Dig i ta l-to-Ana log Conver ter
- Example 3 An embodiment of the present invention provides a calibration apparatus for a receiving link in a multi-antenna beamforming system. As shown in FIG. 3, the apparatus includes: a receiving unit 31, a correlation operation unit 32, a first adjustment unit 33, and an operation unit 34.
- the receiving unit 31 is configured to receive signals of a plurality of receiving links, where the signal includes at least a calibration signal, where the calibration signal comprises a tone signal sent by the local oscillator at a boundary position of two adjacent service carriers.
- the receiving unit 31 may be a signal receiving link when specifically implemented.
- the power of the calibration signal can be set to be 20 dB higher than the low noise of the receiving link, but in practice, an error of 1 dB above and below can be allowed. Because of the directionality of the directional coupler, the calibration signal power and bottom noise emitted by the coupler feeding antenna into the air are the same, and do not cause spurious interference to other systems, so the power of the calibration signal is set to be higher than the receiving chain. The road's low noise is 20dB higher.
- the controller of the system controls the local oscillator to issue the calibration signal; and when the calibration signal is issued, the Multiple receiving links in the system may be receiving service signals or may be in an idle state; when the receiving link is receiving a traffic signal, the received signal of the receiving link includes a service signal and the calibration signal; When the receiving link is in an idle state, the signal received by the receiving link only includes a calibration signal; therefore, the signal received by the receiving link includes at least the calibration signal.
- the correlation operation unit 32 is configured to perform a correlation operation on the calibration signal received by the receiving unit 31, and obtain an amplitude relative difference, a phase relative difference, and a delay relative between each receiving link and a reference receiving link.
- the difference, the reference receiving link is any one of a plurality of receiving links.
- the correlation operation unit 32 may be, but not limited to, a correlator.
- the first adjusting unit 33 is configured to adjust amplitude, phase, and delay of each receiving link according to the amplitude relative difference, the phase relative difference, and the delay relative difference of each receiving link, respectively.
- the amplitude value, the phase value, and the delay value of each receiving link are consistent with the amplitude value, the phase value, and the delay value of the reference receiving link.
- the operation unit 34 is configured to calculate the phase amplitude value, the phase value, and the delay value obtained by the first adjusting unit 33, respectively, and the corresponding digital beamforming coefficients to obtain a combined signal after digital beamforming. Calibration signal.
- the apparatus may further include: a detecting unit 35 and a second adjusting unit
- the detecting unit 36 is configured to calculate, according to the arithmetic unit 34, the amplitude value, the phase value, and the delay value that are consistent with each other, and perform corresponding digital beamforming coefficients to obtain a combined calibration after digital beamforming.
- the power of detecting the combined calibration signal is lower than the single power of the receiving link by 20 dB or less, for example, by 19 dB, 15 dB, or 10 dB, etc., wherein in specific implementation, the power may exist. Up and down l dB error.
- a second adjusting unit 36 configured to adjust a power of the combined calibration signal when the detecting unit 36 detects that the power of the combined calibration signal is lower than a single channel power of the receiving link by 20 dB or less.
- the power of the combined calibration signal is lower than the single channel power of the receiving link by 20 dB or less; the power of the combined calibration signal detected by the detecting unit 36 is not lower than the single power of the receiving link by 20 dB.
- the power of the combined calibration signal is kept unchanged.
- the second adjusting unit 36 may adjust the phase of each of the receiving links by adjusting the power of the combined calibration signal, so that the power of the combined calibration signal is greater than that of the receiving link.
- the single channel power is lower than 20dB.
- the correlation operation unit 32 includes: a high-pass filter module 321, a correlation operation module 322, and an operation module 323.
- a high-pass filtering module 321 configured to perform high-pass filtering processing on the signals received by the receiving unit 31 on the multiple receiving links, to obtain calibration signals corresponding to the multiple receiving links; wherein, the receiving signals are received by the receiving unit 31
- the received signal does not only include the calibration signal, but may also include a traffic signal, so it is necessary to filter out signals other than the calibration signal before performing correlation operations on the calibration signal.
- the high-pass filter module 321 can be a high-pass filter, which is not limited by the embodiment of the present invention. Any device that can implement the function in the prior art can be used in the embodiment of the present invention.
- the correlation operation module 322 is configured to perform a correlation operation on the calibration signal corresponding to each receiving link obtained by the high-pass filtering module 321 to obtain an amplitude difference and a phase difference of each receiving link with respect to a reference receiving link. a value and a delay difference; wherein, the correlation operation module 322 performs a correlation operation on the calibration signal to obtain an amplitude value, a phase value, and a delay value of each receiving link with respect to a reference receiving link,
- the method may include: performing correlation operations on the calibration signals corresponding to the plurality of receiving links to obtain amplitude peaks of the calibration signals; and acquiring amplitude values and phases corresponding to the respective receiving links and the reference receiving links according to the amplitude peaks of the calibration signals a value and a delay value; respectively, subtracting an amplitude value, a phase value, and a delay value of each receiving link from an amplitude value, a phase value, and a delay value of the reference receiving link, to obtain the receiving links and Refer to the ampli
- the related computing module 322 may be a sliding correlator, but the embodiment of the present invention may be used in the embodiments of the present invention.
- the operation module 323 is configured to subtract the amplitude value, the phase difference value, and the delay difference value obtained by the correlation operation module 322 by the amplitude value and the phase value of the link between the phase shifter and the coupler respectively.
- the value is delayed in time to obtain the relative amplitude difference, the phase relative difference, and the delay relative difference between each receiving link and the reference receiving link.
- the embodiment of the present invention further provides a calibration system for a receiving link in a multi-antenna beamforming system.
- the system includes a system controller 41, a local oscillator 42, a coupler 43, and a multi-antenna beamforming system.
- the system controller 41 is configured to control the local oscillator 42 to issue a calibration signal when the receiving link needs to be calibrated in the multi-antenna beamforming system, the calibration signal being at a boundary where the frequency is located at two adjacent service carriers.
- Positional tone signal ;
- the coupler 43 is configured to feed the calibration signal into a receiving link, so that at least the calibration signal is included in a signal received by the receiving link;
- a calibration device 44 for receiving a link in the multi-antenna beamforming system, configured to receive signals of a plurality of receiving links, where the signal includes at least the calibration signal; Calculating, obtaining an amplitude relative difference, a phase relative difference, and a delay relative difference between each receiving link and a reference receiving link, where the reference receiving link is received by any one of the multiple receiving links a link; adjusting amplitude, phase, and delay of each of the receiving links according to the amplitude relative difference, the phase relative difference, and the delay relative difference of each receiving link, so as to increase the amplitude of each channel
- the value, the phase value, and the delay value are consistent with the amplitude value, the phase value, and the delay value of the reference receiving link; and the corresponding amplitude value, phase value, and delay value are respectively corresponding to the digital beam
- the molding coefficient is calculated to obtain a combined calibration signal after digital beamforming.
- the calibration signal used is a tone signal sent by the local oscillator, and the frequency is located at the boundary of two adjacent service carriers. Position, and the power is 20 dB higher than the low noise of the receiving link, the calibration signal is not in the signal band of the traffic signal, and therefore does not interfere with the traffic signal; and when the power of the synthesized calibration signal is adjusted, It is realized by adjusting the phase of each receiving link, and therefore does not interfere with the traffic signal.
- the calibration signal used in the example of the present invention does not interfere with the service signal, the power of the calibration signal does not need to be adjusted when the service signal fluctuates, thereby eliminating the corresponding device for detecting whether the power of the service signal is changed, and controlling the calibration signal.
- the device whose power changes as the power of the traffic signal changes simplifies the calibration process for the receive link and saves hardware cost and size.
- the calibration signal used in the embodiment of the present invention does not interfere with the service signal, it is not necessary to control the power of the check signal to be low, so that the time required for calibration of the receiving link is greater than that of the existing method. It is shortened by more than an order of magnitude; and since the calibration method of the present invention requires a short time, it is generally smaller than the response time of the A-AGC, and does not affect the A-AGC of the receiving link.
- the calibration signal of the embodiment of the present invention is a single tone signal sent by the local oscillator, and does not need to transmit a modulation calibration signal, thereby eliminating corresponding baseband modulation signal generation, DAC, modulator and other transmitting link devices; saving hardware Cost and size.
- the present invention can be implemented by means of software plus necessary general hardware, and of course, through hardware, but In many cases the former is a better implementation.
- the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a readable storage medium, such as a floppy disk of a computer.
- a hard disk or optical disk or the like includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.
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Description
多天线波束成型系统中接收链路的校准方法、 装置及系统 技术领域
本发明涉及通信领域， 尤其涉及一种多天线波束成型系统中接收链路的 校准方法、 装置及系统。
背景技术
多天线波束成型系统中，如智能天线系统、 MIMO ( Mul t iple-input Mul t iple-output , 输入输出） 系统以及有源天线系统等， 都是利用多接收链 路， 在不同的链路上调整幅度相位， 并将接收的多通道信号在数字域叠加， 形成不同的空间波束。 在形成该空间波束的过程中， 由于每路接收链路上有 较多的有源和无源电路、 本机振荡器以及微带传输线等部分， 因此在接收链 路上传输的信号不可避免的存在相位差， 使得各接收链路的时延、 幅度、 相 位存在差异， 如果不对该接收链路的时延、 幅度、 相位差异进行校准和补偿， 则数字域内合成的合路信号将不能按照预期的方向进行同相叠加和异相抵 消， 不能形成预期的接收方向图。 多天线系统中接收链路的校准是多天线波 束成型系统接收波束成形可正常工作的前提。
为达到对接收链路的时延、 幅度、 相位差异进行校准和补偿的目的， 目 前存在一种多天线波束成型系统中接收链路的校准方法， 具体为： 通常发射 一个远低于业务链路信号加噪声的探测信号， 比如探测信号低于业务通道底 噪- 20dB,—般为 PN ( random No i se,随机噪声）信号； 该探测信号通过 1分多 路的分路器分成多路信号， 每路信号通过定向耦合器耦合到一路接收链路； 然后在每路接收链路的数字域接收端通过与发送的探测信号进行滑动相关匹 配的方法检测出各发射通道的时延， 幅度， 相位。
在实施上述多天线波束成型系统中接收链路的校准方法的过程中， 发明 人发现该现有技术中至少存在如下缺点， 包括： 发出的探测信号需要经过定 向耦合器耦合到业务信号带内， 造成对业务信号的干扰。
发明内容
本发明的实施例提供一种多天线波束成型系统中接收链路的校准方法、 装置及系统， 在对接收链路进行校准的过程中， 不干扰业务信号。
为达到上述目的， 本发明的实施例釆用如下技术方案：
一种多天线波束成型系统中接收链路的校准方法， 包括：
多个接收链路接收信号， 所述信号至少包括校准信号， 所述校准信号为 由本机振荡器发出的频率位于两个相邻业务载波的交界位置的单音信号； 对所述校准信号进行相关运算， 获取各接收链路与参考接收链路之间的 幅度相对差值、 相位相对差值以及时延相对差值， 所述参考接收链路为所述 多个接收链路中的任一个接收链路；
根据各接收链路的幅度相对差值、 相位相对差值以及时延相对差值， 分 别调整所述各接收通道的幅度、 相位以及时延， 使所述各接收链路的幅度值、 相位值以及时延值与所述参考接收链路的幅度值、 相位值以及时延值相一致； 将所述相一致的幅度值、 相位值以及时延值， 分别与其对应的数字波束 成型系数进行运算， 得到数字波束成型后的合路校准信号。
一种多天线波束成型系统中接收链路的校准装置， 包括：
接收单元， 用于接收多个接收链路的信号， 所述信号至少包括校准信号， 所述校准信号为由本机振荡器发出的频率位于两个相邻业务载波的交界位置 的单音信号；
相关运算单元， 用于将所述接收单元接收到的所述校准信号进行相关运 算， 获取各接收链路与参考接收链路之间的幅度相对差值、 相位相对差值以 及时延相对差值， 所述参考接收链路为所述多个接收链路中的任一个接收链 路；
第一调整单元， 用于根据所述各接收链路的幅度相对差值、 相位相对差 值以及时延相对差值， 分别调整所述各接收链路的幅度、 相位以及时延， 使 所述各接收链路的幅度值、 相位值以及时延值与所述参考接收链路的幅度值、
相位值以及时延值相一致；
运算单元， 用于将所述第一调整单元得到的所述相一致的幅度值、 相位 值以及时延值， 分别与其对应的数字波束成型系数进行运算， 得到数字波束 成型后的合路校准信号。
一种多天线波束成型系统中接收链路的校准系统， 包括系统控制器、 本 机振荡器、 耦合器和多天线波束成型系统中接收链路的校准装置；
所述系统控制器用于， 在需要对多天线波束成型系统中接收链路进行校 准时， 控制本机振荡器发出校准信号， 所述校准信号为频率位于两个相邻业 务载波的交界位置的单音信号；
所述耦合器， 用于将所述校准信号馈入接收链路中， 使所述接收链路接 收的信号中至少包括所述校准信号；
所述多天线波束成型系统中接收链路的校准装置， 用于接收多个接收链 路的信号， 所述信号至少包括所述校准信号； 对所述校准信号进行相关运算， 获取各接收链路与参考接收链路之间的幅度相对差值、 相位相对差值以及时 延相对差值， 所述参考接收链路为所述多个接收链路中的任一个接收链路； 根据所述各接收链路的幅度相对差值、 相位相对差值以及时延相对差值， 分 别调整所述各接收链路的幅度、 相位以及时延， 使所述各通道的幅度值、 相 位值以及时延值与所述参考接收链路的幅度值、 相位值以及时延值相一致； 将所述相一致的幅度值、 相位值以及时延值， 分别与其对应的数字波束成型 系数进行运算 , 得到数字波束成型后的合路校准信号。
本发明技术方案中， 在对多天线波束成型系统中的接收链路进行校准时， 釆用的校准信号为由本机振荡器发出的其频率位于两个相邻业务载波的交界 位置的单音信号， 该校准信号不在业务信号的信号带内， 因此实现了在对接 收链路进行校准的过程中， 对业务信号不构成干扰。
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。
图 1为本发明实施例 1多天线波束成型系统中接收链路的校准方法流程 图；
图 2为本发明实施例 2多天线波束成型系统中接收链路的校准方法流程 图；
图 3为本发明实施例 3—种多天线波束成型系统中接收链路的校准装置 的组成框图；
图 4为本发明实施例 3另一种多天线波束成型系统中接收链路的校准装 置的组成框图；
图 5为本发明实施例 3另一种多天线波束成型系统中接收链路的校准装 置的组成框图；
图 6为本发明实施例 3中一种多天线波束成型系统中接收链路的校准系 统的组成框图。
具体实施方式
下面将结合本发明实施例中的附图， 对本发明实施例中的技术方案进行 清楚、 完整地描述， 显然， 所描述的实施例仅仅是本发明一部分实施例， 而 不是全部的实施例。 基于本发明中的实施例， 本领域普通技术人员在没有作 出创造性劳动前提下所获得的所有其他实施例 , 都属于本发明保护的范围。
实施例 1
本发明实施例提供一种多天线波束成型系统中接收链路的校准方法， 如 图 1所示， 该方法包括：
1 01、 多个接收链路接收信号， 所述信号至少包括校准信号， 所述校准信 号包括由本机振荡器发出的频率位于两个相邻业务载波的交界位置的单音信 号。
其中， 本发明实施例在对多天线波束成型系统中的接收链路进行校准时， 由系统控制器控制本机振荡器发出所述校准信号， 并由耦合器将所述校准信 号分别馈入所述多个接收链路中； 而在所述校准信号发出的同时， 该系统中 的多个接收链路可能正在接收业务信号， 也可能处于空闲状态； 当该接收链 路正在接收业务信号时， 所述接收链路接收的信号包括业务信号和所述校准 信号； 当该接收链路处于空闲状态时， 所述接收链路接收到的信号仅包含校 准信号； 因此所述多个接收链路接收到的信号至少包含所述校准信号。
102、 将所述校准信号进行相关运算， 获取各接收链路与参考接收链路之 间的幅度相对差值、 相位相对差值以及时延相对差值， 所述参考接收链路为 所述多个接收链路中的任一接收链路。
103、根据各接收链路的幅度相对差值、相位相对差值以及时延相对差值， 分别调整所述各接收链路的幅度、 相位以及时延， 使所述各接收链路的幅度 值、 相位值以及时延值与所述参考接收链路的幅度值、 相位值以及时延值相 一致。
104、 将所述相一致的幅度值、 相位值以及时延值， 分别与其对应的数字 波束成型系数进行运算， 得到数字波束成型后的合路校准信号。
本发明实施例中， 在对多天线波束成型系统中的接收链路进行校准时， 釆用的校准信号为由本机振荡器发出的其频率位于两个相邻业务载波的交界 位置的单音信号， 该校准信号不在业务信号的信号带内， 因此对业务信号不 构成干扰， 实现了在对接收链路进行校准的过程中， 对业务信号也不构成干 扰。
实施例 2
本发明实施例提供一种多天线波束成型系统中接收链路的校准方法， 如 图 2所示， 该方法包括：
201、 多个接收链路接收信号， 所述信号至少包括校准信号， 所述校准信 号包括由本机振荡器发出的频率位于两个相邻业务载波的交界位置单音信
号， 并且该校准信号的功率比所述接收链路的低噪高 20dB。
其中， 本发明实施例在对多天线波束成型系统中的接收链路进行校准时， 由系统控制器控制本机振荡器发出所述校准信号， 并由耦合器将所述校准信 号分别馈入所述多个接收链路中； 而在所述校准信号发出的同时， 该系统中 的多个接收链路可能正在接收业务信号， 也可能处于空闲状态； 当该接收链 路正在接收业务信号时， 所述接收链路接收的信号包括业务信号和所述校准 信号； 当该接收链路处于空闲状态时， 所述接收链路接收到的信号仅包含校 准信号； 因此所述多个接收链路接收到的信号至少包含所述校准信号。
由于定向耦合器的方向性， 由耦合器馈入天线发射到空中的校准信号功 率和底噪相同， 对其他系统不构成杂散干扰， 因此将所述校准信号的功率设 置为比所述接收链路的低噪高 20dB的功率； 在具体实施时， 该校准信号的功 率可以存在上下 ldB的误差。
202、 将所述多个接收链路接收到的信号进行高通滤波处理， 得到所述多 个接收链路对应的校准信号。
由于在步骤 201 中所述多接收链路接收到的信号中不仅仅包含所述校准 信号， 还可能包含业务信号， 因此在对校准信号进行相关运算之前， 需要将 所述校准信号以外的信号过滤掉。 其中， 执行该步骤的设备可以为高通滤波 器， 本发明实施例对此不进行限制， 现有技术中可以实现该功能的设备都可 以用于本发明实施例的该步骤中。
203、 将各接收链路对应的校准信号进行相关运算， 得到所述各接收链路 相对于参考接收链路的幅度差值、 相位差值以及时延差值。
其中， 在将所述校准信号进行相关运算， 得到各接收链路相对于参考接 收链路的幅度值、 相位值以及时延值的过程中， 可以釆用以下的步骤， 包括： 将多个接收链路对应的校准信号进行相关运算， 获取所述校准信号的幅度峰 值； 根据所述校准信号的幅度峰值获取各接收链路和参考接收链路对应的幅 度值、 相位值以及时延值； 将各接收链路的幅度值、 相位值以及时延值分别
与所述参考接收链路的幅度值、 相位值以及时延值相减， 得到所述各接收链 路与参考接收链路的幅度差值、 相位差值以及时延差值。
其中， 执行本发明实施例步骤的设备可以为滑动相关器， 但不发明实施 例对此不进行限制， 现有技术中可以实现该功能的设备都可以用于本发明实 施例的该步骤中。
204、 将所述幅度差值、 相位差值以及时延差值， 分别减去移相器到耦合 器之间链路的幅度值、 相位值以及时延值， 得到各接收链路与参考接收链路 之间的幅度相对差值、 相位相对差值以及时延相对差值。
进一步， 在执行本步骤的过程中， 由于移相器到耦合器的时延值很小， 在具体实施时可以将于移相器到耦合器之间链路的时延值忽略。
205、 根据所述各接收链路的幅度相对差值、 相位相对差值以及时延相对 差值， 分别调整所述各接收链路的幅度、 相位以及时延， 使所述各接收链路 的幅度值、 相位值以及时延值与所述参考接收链路的幅度值、 相位值以及时 延值相一致。
206、 将所述相一致的幅度值、 相位值以及时延值， 分别与其对应的数字 波束成型系数进行运算， 得到数字波束成型后的合路校准信号。
207、 检测所述合路校准信号的功率是否比所述接收链路的单路功率低 20dB以下， 例如低 19dB、 15 dB或 10 dB等， 其中在具体实施时， 该功率可 以存在上下 l dB 的误差； 若检测到所述合路校准信号的功率不比所述接收链 路的单路功率低 20dB以下， 则执行步骤 208 ; 若检测到所述合路校准信号的 功率比所述接收链路的单路功率低 20dB以下， 则保持合路校准信号的功率不 变。
208、 调整所述合路校准信号的功率， 使所述合路校准信号的功率比所述 接收链路的单路功率低 20dB以下。
其中， 所述调整所述合路校准信号的功率， 使所述合路校准信号的功率 比所述接收链路的单路功率低 20dB以下具体可以为： 调节所述各接收链路的
相位， 使所述合路校准信号的功率比所述接收链路的单路功率低 20dB以下。 其中本发明实施例的该步骤可以由移相器完成， 移相器在调节所述各接收链 路的相位后， 使得移相器相位加 DBF相位的综合效果对校准信号的响应比最 大值低 20dB以上； 移相器调节的范围可以在离线进行仿真， 把数据存入， 使 用时用配置的 DBF参数去查找。 系统记录移相器的各路相位值， 以供下一次 校准时做补偿数据。
本发明实施例中， 在对多天线波束成型系统中的接收链路进行校准时， 釆用的校准信号为由本机振荡器发出的单音信号， 其频率位于两个相邻业务 载波的交界位置， 并且功率比所述接收链路的低噪高 20dB, 该校准信号不在 业务信号的信号带内， 因此对业务信号不构成干扰； 并且在对合成后的校准 信号的功率进行调整时， 是通过调整各接收链路的相位实现的， 因此对业务 信号也不构成干扰。
并且， 由于本发明实例中釆用的校准信号不干扰业务信号， 在业务信号 波动时， 校准信号的功率无需调整， 因此省掉了相应的检测业务信号的功率 是否改变的装置， 以及控制校准信号的功率随着业务信号的功率的改变而改 变的装置， 使得对接收链路的校准过程简单化， 并且节约了硬件成本和尺寸。
进一步的， 由于本发明实施例中釆用的校准信号对业务信号不构成干扰， 因此无需将校验信号的功率控制到很低， 使对接收链路的校准所需时间比现 有方法大为缩短个数量级以上； 并且由于本发明的校准方法所需时间很短， 一般都小于 A-AGC ( Ana logous Automa t i c Ga in Control , 模拟自动增益控制 ) 的响应时间， 对接收链路的 A-AGC不构成影响。
更进一步， 本发明实施例的校准信号由本机振荡器发出的单音信号， 无须 发射调制校准信号， 省掉了相应的基带调制信号生成， DAC ( Dig i ta l-to-Ana log Conver ter , 数字-模拟转换器） ， 调制器等发射链路 装置； 节约了硬件成本和尺寸。
实施例 3
本发明实施例提供一种多天线波束成型系统中接收链路的校准装置， 如 图 3所示， 该装置包括： 接收单元 31、 相关运算单元 32、 第一调整单元 33、 运算单元 34。
接收单元 31 , 用于接收多个接收链路的信号， 所述信号至少包括校准信 号， 所述校准信号包括本机振荡器发出的频率位于两个相邻业务载波的交界 位置的单音信号。 其中， 该接收单元 31在具体实施时可以为信号接收链路。
为了进一步避免校准信号对业务信号的干扰， 可以将所述校准信号的功 率设置为比所述接收链路的低噪高 20dB ,但在具体实施时，可以允许上下 1 dB 的误差。 因为定向耦合器的方向性， 由耦合器馈入天线发射到空中的校准信 号功率和底噪相同， 对其他系统不构成杂散干扰， 因此将所述校准信号的功 率设置为比所述接收链路的低噪高 20dB的功率。
其中， 本发明实施例在对多天线波束成型系统中的接收链路进行校准时， 由该系统的控制器控制本机振荡器发出所述校准信号； 而在所述校准信号发 出的同时， 该系统中的多个接收链路可能正在接收业务信号， 也可能处于空 闲状态； 当该接收链路正在接收业务信号时， 所述接收链路接收的信号包括 业务信号和所述校准信号； 当该接收链路处于空闲状态时， 所述接收链路接 收到的信号仅包含校准信号； 因此所述接收链路接收到的信号至少包含所述 校准信号。
相关运算单元 32 ,用于将所述接收单元 31接收到的所述校准信号进行相 关运算， 获取各接收链路与参考接收链路之间的幅度相对差值、 相位相对差 值以及时延相对差值， 所述参考接收链路为多个接收链路中的任一个接收链 路。 其中， 所述相关运算单元 32可以为但不局限于相关器。
第一调整单元 33 , 用于根据所述各接收链路的幅度相对差值、 相位相对 差值以及时延相对差值， 分别调整所述各接收链路的幅度、 相位以及时延， 使所述各接收链路的幅度值、 相位值以及时延值与所述参考接收链路的幅度 值、 相位值以及时延值相一致。
运算单元 34 , 用于将所述第一调整单元 33得到的所述相一致的幅度值、 相位值以及时延值， 分别与其对应的数字波束成型系数进行运算， 得到数字 波束成型后的合路校准信号。
进一步， 如图 5所示， 该装置还可以包括： 检测单元 35和第二调整单元
36。
所述检测单元 36 , 用于在所述运算单元 34将所述相一致的幅度值、相位 值以及时延值， 分别与其对应的数字波束成型系数进行运算， 得到数字波束 成型后的合路校准信号后， 检测所述合路校准信号的功率是比所述接收链路 的单路功率低 20dB以下， 例如低 1 9dB、 15 dB或 1 0 dB等， 其中在具体实施 时， 该功率可以存在上下 l dB的误差。
第二调整单元 36 ,用于在所述检测单元 36检测到所述合路校准信号的功 率比所述接收链路的单路功率低 20dB以下时，调整所述合路校准信号的功率， 使所述合路校准信号的功率比所述接收链路的单路功率低 20dB以下； 在所述 检测单元 36检测到所述合路校准信号的功率不比所述接收链路的单路功率低 20dB 以下时， 保持所述合路校准信号的功率不变。 其中， 所述第二调整单元 36在调整所述合路校准信号的功率时，可以通过调节所述各接收链路的相位， 以使所述合路校准信号的功率比所述接收链路的单路功率低 20dB以下。
进一步的， 如图 5所示， 所述相关运算单元 32包括： 高通滤波模块 321、 相关运算模块 322和运算模块 323。
高通滤波模块 321 , 用于将所述接收单元 31接收到多个接收链路的信号 进行高通滤波处理， 得到所述多个接收链路对应的校准信号； 其中， 由于在 所述接收单元 31接收到的信号中不仅仅包含所述校准信号， 还可能包含业务 信号， 因此在对所述校准信号进行相关运算之前， 需要将所述校准信号以外 的信号过滤掉。 其中， 所述高通滤波模块 321 可以为高通滤波器， 本发明实 施例对此不进行限制， 现有技术中可以实现该功能的设备都可以用于本发明 实施例。
相关运算模块 322 ,用于将所述高通滤波模块 321得到的各接收链路对应 的所述校准信号进行相关运算， 得到所述各接收链路相对于参考接收链路的 幅度差值、 相位差值以及时延差值； 其中， 在所述相关运算模块 322 将所述 校准信号进行相关运算， 得到各接收链路相对于参考接收链路的幅度值、 相 位值以及时延值的过程中， 可以包括： 将多个接收链路对应的校准信号进行 相关运算， 获取所述校准信号的幅度峰值； 根据所述校准信号的幅度峰值获 取各接收链路和参考接收链路对应的幅度值、 相位值以及时延值； 将各接收 链路的幅度值、 相位值以及时延值分别与所述参考接收链路的幅度值、 相位 值以及时延值相减， 得到所述各接收链路与参考接收链路的幅度差值、 相位 差值以及时延差值。
其中， 所述相关运算模块 322 可以为滑动相关器， 但不发明实施例对此 不进行限制， 现有技术中可以实现该功能的设备都可以用于本发明实施例。
运算模块 323 , 用于将所述相关运算模块 322得到的所述幅度差值、相位 差值以及时延差值， 分别减去移相器到耦合器之间链路的幅度值、 相位值以 及时延值， 得到各接收链路与参考接收链路之间的幅度相对差值、 相位相对 差值以及时延相对差值。
本发明实施例还提供一种多天线波束成型系统中接收链路的校准系统， 如图 6所示， 该系统包括系统控制器 41、 本机振荡器 42、 耦合器 43和多天 线波束成型系统中接收链路的校准装置 44;
所述系统控制器 41用于， 在需要对多天线波束成型系统中接收链路进行 校准时， 控制本机振荡器 42发出校准信号， 所述校准信号为频率位于两个相 邻业务载波的交界位置的单音信号；
所述耦合器 43 , 用于将所述校准信号馈入接收链路中， 使所述接收链路 接收的信号中至少包括所述校准信号；
所述多天线波束成型系统中接收链路的校准装置 44 , 用于接收多个接收 链路的信号， 所述信号至少包括所述校准信号； 对所述校准信号进行相关运
算， 获取各接收链路与参考接收链路之间的幅度相对差值、 相位相对差值以 及时延相对差值， 所述参考接收链路为所述多个接收链路中的任一个接收链 路； 根据所述各接收链路的幅度相对差值、 相位相对差值以及时延相对差值， 分别调整所述各接收链路的幅度、 相位以及时延， 使所述各通道的幅度值、 相位值以及时延值与所述参考接收链路的幅度值、 相位值以及时延值相一致； 将所述相一致的幅度值、 相位值以及时延值， 分别与其对应的数字波束成型 系数进行运算 , 得到数字波束成型后的合路校准信号。
本发明实施例中， 在对多天线波束成型系统中的接收链路进行校准时， 釆用的校准信号为由本机振荡器发出的单音信号， 其频率位于两个相邻业务 载波的交界位置， 并且功率比所述接收链路的低噪高 20dB, 该校准信号不在 业务信号的信号带内， 因此对业务信号不构成干扰； 并且在对合成后的校准 信号的功率进行调整时， 是通过调整各接收链路相位实现的， 因此对业务信 号也不构成干扰。
并且， 由于本发明实例中釆用的校准信号不干扰业务信号， 在业务信号 波动时， 校准信号的功率无需调整， 因此省掉了相应的检测业务信号的功率 是否改变的装置， 以及控制校准信号的功率随着业务信号的功率的改变而改 变的装置， 使得对接收链路的校准过程简单化， 并且节约了硬件成本和尺寸。
进一步的， 由于本发明实施例中釆用的校准信号对业务信号不构成干扰， 因此无需将校验信号的功率控制到很低， 使对接收链路的校准所需时间比现 有方法大为缩短个数量级以上； 并且由于本发明的校准方法所需时间很短， 一般都小于 A-AGC的响应时间， 对接收链路的 A-AGC不构成影响。
更进一步，本发明实施例的校准信号由本机振荡器发出的单音信号，无须 发射调制校准信号， 省掉了相应的基带调制信号生成， DAC , 调制器等发射链 路装置； 节约了硬件成本和尺寸。
通过以上的实施方式的描述， 所属领域的技术人员可以清楚地了解到本 发明可借助软件加必需的通用硬件的方式来实现， 当然也可以通过硬件， 但
很多情况下前者是更佳的实施方式。 基于这样的理解， 本发明的技术方案本 质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来， 该 计算机软件产品存储在可读取的存储介质中， 如计算机的软盘， 硬盘或光盘 等， 包括若干指令用以使得一台计算机设备（可以是个人计算机， 服务器， 或者网络设备等）执行本发明各个实施例所述的方法。
以上所述， 仅为本发明的具体实施方式， 但本发明的保护范围并不局限 于此， 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内， 可轻易 想到变化或替换， 都应涵盖在本发明的保护范围之内。 因此， 本发明的保护 范围应以所述权利要求的保护范围为准。
Claims
权 利 要求 书
1、 一种多天线波束成型系统中接收链路的校准方法， 其特征在于， 包括： 多个接收链路接收信号， 所述信号至少包括校准信号， 所述校准信号为由 本机振荡器发出的频率位于两个相邻业务载波的交界位置的单音信号；
对所述校准信号进行相关运算， 获取各接收链路与参考接收链路之间的幅 度相对差值、 相位相对差值以及时延相对差值， 所述参考接收链路为所述多个 接收链路中的任一个接收链路；
根据所述各接收链路的幅度相对差值、 相位相对差值以及时延相对差值， 分别调整所述各接收链路的幅度、 相位以及时延， 使所述各通道的幅度值、 相 位值以及时延值与所述参考接收链路的幅度值、 相位值以及时延值相一致； 将所述相一致的幅度值、 相位值以及时延值， 分别与其对应的数字波束成 型系数进行运算， 得到数字波束成型后的合路校准信号。
1、 根据权利要求 1所述的方法， 其特征在于， 所述对所述校准信号进行相 关运算， 获取各接收链路与参考接收链路之间的幅度相对差值、 相位相对差值 以及时延相对差值包括：
将所述多个接收链路接收到的信号进行高通滤波处理， 得到所述多个接收 链路对应的校准信号；
将各接收链路对应的校准信号进行相关运算， 得到所述各接收链路相对于 参考接收链路的幅度差值、 相位差值以及时延差值；
将所述幅度差值、 相位差值以及时延差值， 分别减去移相器到耦合器之间 链路的幅度值、 相位值以及时延值， 得到所述各接收链路与参考接收链路之间 的幅度相对差值、 相位相对差值以及时延相对差值。
3、 根据权利要求 1或 2所述的方法， 其特征在于，
所述校准信号的功率比所述接收链路的低噪高 2 OdB。
4、 根据权利要求 1所述的方法， 其特征在于， 在将所述相一致的幅度值、 相位值以及时延值， 分别与其对应的数字波束成型系数进行运算， 得到数字波
束成型后的合路校准信号之后， 该方法还包括：
检测所述合路校准信号的功率是否比所述接收链路的单路功率低 20 dB 以 下；
若检测到所述合路校准信号的功率不比所述接收链路单路功率低 20 dB 以 下， 则调整所述合路校准信号的功率， 使所述合路校准信号的功率比所述接收 链路的单路功率低 20dB以下。
5、 根据权利要求 4所述的方法， 其特征在于， 所述调整所述合路校准信号 的功率， 使所述合路校准信号的功率比所述接收链路的单路功率低 20dB以下， 包括：
调节所述各接收链路的相位， 以使所述合路校准信号的功率比所述接收链 路的单路功率低 20dB以下。
6、 一种多天线波束成型系统中接收链路的校准装置， 其特征在于， 包括： 接收单元， 用于接收多个接收链路的信号， 所述信号至少包括校准信号， 所述校准信号为由本机振荡器发出的频率位于两个相邻业务载波的交界位置的 单音信号；
相关运算单元， 用于将所述接收单元接收到的所述校准信号进行相关运算， 获取各接收链路与参考接收链路之间的幅度相对差值、 相位相对差值以及时延 相对差值， 所述参考接收链路为所述多个接收链路中的任一个接收链路；
第一调整单元， 用于根据所述各接收链路的幅度相对差值、 相位相对差值 以及时延相对差值， 分别调整所述各接收链路的幅度、 相位以及时延， 使所述 各接收链路的幅度值、 相位值以及时延值与所述参考接收链路的幅度值、 相位 值以及时延值相一致；
运算单元， 用于将所述第一调整单元得到的所述相一致的幅度值、 相位值 以及时延值， 分别与其对应的数字波束成型系数进行运算， 得到数字波束成型 后的合路校准信号。
7、 根据权利要求 6所述的装置， 其特征在于， 所述相关运算单元包括：
高通滤波模块， 用于将所述接收单元接收到的多个接收链路的信号进行高 通滤波处理， 得到所述多个接收链路对应的校准信号；
相关运算模块， 用于将所述高通滤波模块得到的各接收链路对应的所述校 准信号进行相关运算， 得到所述各接收链路相对于参考接收链路的幅度差值、 相位差值以及时延差值；
运算模块， 用于将所述相关运算模块得到的所述幅度差值、 相位差值以及 时延差值， 分别减去移相器到耦合器之间链路的幅度值、 相位值以及时延值， 得到所述各接收链路与参考接收链路之间的幅度相对差值、 相位相对差值以及 时延相对差值。
8、 根据权利要求 6所述的装置， 其特征在于， 所述校准信号的功率比所述 接收链路的低噪高 20dB。
9、 根据权利要求 6所述的装置， 其特征在于， 该装置还包括：
检测单元， 用于在所述运算单元将所述相一致的幅度值、 相位值以及时延 值， 分别与其对应的数字波束成型系数进行运算， 得到数字波束成型后的合路 校准信号后， 检测所述合路校准信号的功率是否比所述接收链路的单路功率低 20dB以下；
第二调整单元， 用于在所述检测单元检测到所述合路校准信号的功率不比 所述接收链路的单路功率低 2 OdB以下时， 调整所述合路校准信号的功率， 使所 述合路校准信号的功率比所述接收链路的单路功率低 20dB以下。
1 0、 根据权利要求 9 所述的装置， 其特征在于， 所述第二调整单元用于， 调节所述各接收链路的相位， 以使所述合路校准信号的功率比所述接收链路的 单路功率低 2 OdB以下。
1 1、 一种多天线波束成型系统中接收链路的校准系统， 其特征在于， 包括 系统控制器、 本机振荡器、 耦合器和多天线波束成型系统中接收链路的校准装 置；
所述系统控制器用于， 在需要对多天线波束成型系统中接收链路进行校准
时， 控制本机振荡器发出校准信号， 所述校准信号为频率位于两个相邻业务载 波的交界位置的单音信号；
所述耦合器， 用于将所述校准信号馈入接收链路中， 使所述接收链路接收 的信号中至少包括所述校准信号；
所述多天线波束成型系统中接收链路的校准装置， 用于接收多个接收链路 的信号， 所述信号至少包括所述校准信号； 对所述校准信号进行相关运算， 获 取各接收链路与参考接收链路之间的幅度相对差值、 相位相对差值以及时延相 对差值， 所述参考接收链路为所述多个接收链路中的任一个接收链路； 根据所 述各接收链路的幅度相对差值、 相位相对差值以及时延相对差值， 分别调整所 述各接收链路的幅度、 相位以及时延， 使所述各通道的幅度值、 相位值以及时 延值与所述参考接收链路的幅度值、 相位值以及时延值相一致； 将所述相一致 的幅度值、 相位值以及时延值， 分别与其对应的数字波束成型系数进行运算， 得到数字波束成型后的合路校准信号。
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| CN101548479A (zh) * | 2006-12-08 | 2009-09-30 | 诺基亚公司 | 扩频通信系统中的校准 |
| US20090075615A1 (en) * | 2007-09-17 | 2009-03-19 | Roberts Richard D | Device, system, and method of phased-array calibration |
| WO2010060953A1 (en) * | 2008-11-26 | 2010-06-03 | Ubidyne, Inc. | A calibration apparatus and a method for generating for at least one calibration signal for an antenna array |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105379014A (zh) * | 2014-06-06 | 2016-03-02 | 华为技术有限公司 | 多个有源天线的通道联合校正方法及装置 |
| CN105379014B (zh) * | 2014-06-06 | 2018-04-10 | 华为技术有限公司 | 多个有源天线的通道联合校正方法及装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102405555B (zh) | 2014-04-02 |
| CN102405555A (zh) | 2012-04-04 |
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