CN102948083A - 通信设备中管理干扰的方法和装置 - Google Patents

通信设备中管理干扰的方法和装置 Download PDF

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CN102948083A
CN102948083A CN2011800304957A CN201180030495A CN102948083A CN 102948083 A CN102948083 A CN 102948083A CN 2011800304957 A CN2011800304957 A CN 2011800304957A CN 201180030495 A CN201180030495 A CN 201180030495A CN 102948083 A CN102948083 A CN 102948083A
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measurement
matching network
communication equipment
tuning state
interference
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CN102948083B (zh
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基思·R·曼森
马修·R·格林
韦恩·E·史密斯
大卫·M·施卢特
约翰·H·斯皮尔斯
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Xircom Research
BlackBerry Ltd
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Paratek Microwave Inc
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/08Modifications for reducing interference; Modifications for reducing effects due to line faults ; Receiver end arrangements for detecting or overcoming line faults
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40Circuits
    • H04B1/401Circuits for selecting or indicating operating mode
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01PWAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00Coupling devices of the waveguide type
    • H01P5/12Coupling devices having more than two ports
    • H01P5/16Conjugate devices, i.e. devices having at least one port decoupled from one other port
    • H01P5/18Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers
    • H01P5/188Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers the guides being dielectric waveguides
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00Networks using active elements
    • H03H11/02Multiple-port networks
    • H03H11/28Impedance matching networks
    • H03H11/30Automatic matching of source impedance to load impedance
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/38Impedance-matching networks
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/38Impedance-matching networks
    • H03H7/40Automatic matching of load impedance to source impedance
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02Transmitters
    • H04B1/04Circuits
    • H04B1/0475Circuits with means for limiting noise, interference or distortion
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06Receivers
    • H04B1/10Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/1027Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06Receivers
    • H04B1/10Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/109Means associated with receiver for limiting or suppressing noise or interference by improving strong signal performance of the receiver when strong unwanted signals are present at the receiver input
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06Receivers
    • H04B1/10Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/12Neutralising, balancing, or compensation arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40Circuits
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B15/00Suppression or limitation of noise or interference
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/02Arrangements for optimising operational condition

Abstract

结合本公开教导的系统可以包括例如具有控制器的通信设备,用于检测干扰源的存在,并且基于是否存在干扰源以及基于来自开环或闭环反馈配置中的至少一个的信息来确定可变匹配网络的调谐状态。还公开了其它实施例。

Description

通信设备中管理干扰的方法和装置
相关申请的交叉引用
本申请要求2010年4月20日提交的美国临时申请序列号61/326,206的优先权,其全部内容将通过引用合并于此。
技术领域
本公开总体上涉及通信设备操作,更具体地,涉及通信设备中管理干扰的方法和装置。
背景技术
诸如无线保真度(WiFi)或蜂窝基站之类的无线接入点与诸如蜂窝电话和膝上型计算机之类的便携式移动设备之间的无线通信质量取决于许多因素。例如,便携式设备中的天线性能会受到其操作环境的影响。针对无线手机可以存在多种使用情况,包括如手机天线紧邻用户头部放置,或者在用户口袋中,或者用手覆盖天线,这会显著降低无线设备的效率。类似地,网络拓扑和移动设备的位置会影响无线通信的质量。
附图说明
图1示出了通信设备的示意性实施例;
图2示出了图1通信设备的收发机的一部分的示意性实施例;
图3-4示出了图2收发机的可调谐匹配网络的示意性实施例;
图5-6示出了可调谐匹配网络的可调谐电抗元件的示意性实施例;
图7-8示出了具有可调谐匹配网络的通信设备的多个部分的示意性实施例;
图9示出了在图7-8的通信设备的多个部分中操作的方法;
图10示出了包括功率和相位检测器的通信设备部分的示意性实施例;
图11示出了针对图10通信设备的频率图的示意性实施例;
图12-16示出了包括功率和相位检测器的通信设备部分的示意性实施例;
图17-18示出了示例性时序图的示意性实施例;
图19示出了包括功率和相位检测器的通信设备部分的示意性实施例;以及
图20示出了计算机系统形式的机器的示意性图示,在该计算机系统中,当执行指令集时,可以使机器执行这里所公开的方法中的任何一个或多个。
具体实施方式
本公开的一个实施例限定了一种计算机可读存储介质,包括计算机指令,用于:检测干扰源的存在;并且确定具有可调谐电抗的匹配网络的调谐状态,其中确定调谐状态基于是否存在干扰源,并且基于来自开环或闭环反馈配置中的至少一个的信息。
本公开的一个实施例限定了一种匹配网络,包括:可调谐电抗电路,配置为耦合至通信设备的发射机部分和接收机部分中的至少一个,其中可调谐电抗电路可调整到多个调谐状态,并且确定调谐状态基于是否存在干扰源,并且基于来自可调谐电抗电路的开环或闭环反馈配置中的至少一个的信息。
本公开的一个实施例限定了一种方法,包括:基于干扰源的存在来检测对通信设备的干扰,并且基于是否存在干扰源来确定通信设备的可变匹配网络的调谐状态。
本公开的一个实施例限定了一种通信设备,包括:控制器,用于确定可变匹配网络的调谐状态,可变匹配网络控制通信设备的接收机部分和发射机部分中的至少一个的一个或多个操作特性,其中,控制器操作用于检测干扰源的存在,并且基于是否存在干扰源以及基于来自开环或闭环反馈配置中的至少一个的信息,来确定调谐状态。
本公开的一个实施例限定了一种方法,包括:检测干扰通信设备的干扰源的存在;基于干扰源是否存在来确定通信设备的可变匹配网络的调谐状态;并且仅当未检测到存在干扰源时才基于确定的调谐状态来调整可变匹配网络。
本公开的一个实施例限定了一种方法,包括:检测源自干扰源的对通信设备的干扰;并且基于检测到的干扰来确定通信设备的可变匹配网络的调谐状态。
本公开的一个实施例限定了一种方法,包括:确定对通信设备的干扰的参数,所述干扰来源于干扰源,并且基于干扰参数来调整通信设备的可变匹配网络的调谐状态。
本公开的一个实施例限定了一种匹配网络,包括:可调谐电抗电路;配置为耦合至通信设备的发射机部分和接收机部分中的至少一个,其中可调谐电抗电路可调整到多个调谐状态,并且确定调谐状态基于与检测到的干扰相关联的参数。
本公开的一个实施例限定了一种非暂时性计算机可读存储介质,包括计算机指令,用于:确定对通信设备的干扰;并且基于与干扰相关联的参数来调整通信设备的可变匹配网络的调谐状态。
图1示出了通信设备100的示意性实施例。通信设备100可以包括无线收发机102(这里具有独立的发射和接收机部分)、用户接口(UI)104、电源114、和用于管理其操作的控制器106。无线收发机102可以利用诸如蓝牙、WiFi、数字增强型无绳通信(DECT)之类的短距离或长距离无线接入技术,或蜂窝通信技术等。例如,蜂窝技术可以包括CDMA-1X、WCDMA、UMT S/HSDPA、GSM/GPRS、TDMA/EDGE、EV/DO、WiMAX和正出现的下一代蜂窝无线通信技术。
UI 104可以包括可下压或触敏键区108,具有诸如滚动球、操纵杆、鼠标或用于操纵通信设备100的操作的导航盘之类的导航机制。键区108可以是通信设备100的外壳组件的构成部分,或者可以是通过带缆有线接口(如柔性电缆)或支持例如蓝牙的无线接口与之操作耦合的独立设备。键区108可以表示通常由电话所使用的数字拨号键区,和/或具有数字字母按键的Qwerty键区。UI 104还可以包括显示器110,如单色或彩色LCD(液晶显示器)、OLED(有机发光二极管)或其它适合的显示器技术,用于向通信设备100的终端用户传递图像。在显示器110是触感显示器的实施例中,可以通过显示器来提供键区108的一部分或全部。
电源114可以利用常见功率管理技术(如可替换电池、电源调整技术和充电系统技术),用于向通信设备100的组件提供能量,以促进便携式应用。控制器106可以利用计算技术,如具有诸如闪存、ROM、RAM、SRAM、DRAM之类的相关存储器的微处理器和/或数字信号处理器(DSP),或其它类似技术。
图2示出了图1通信设备100的无线收发机102的一部分的示意性实施例。在GSM应用中,收发机102的发射和接收部分可以包括经由开关204与可调谐匹配网络202和阻抗负载206相耦合的通用放大器201、203。本说明中的负载206可以是如图1所示的天线(这里是天线206)。射频(RF)信号形式的发射信号(TX)可以送往放大器201,放大器201对信号进行放大,并在针对发射会话使能开关204时将放大后的信号通过可调谐匹配网络202送往天线206。收发机102的接收部分可以利用前置放大器203,前置放大器203在针对接收会话使能开关204时放大经由可调谐匹配网络202从天线206接收的信号。图2的其它配置可用于其它类型的蜂窝接入技术,如CDMA。可以通过本公开预想这些未公开的配置。
图3-4示出了图2收发机102的可调谐匹配网络202的示意性实施例。在一个实施例中,可调谐匹配网络202可以包括控制电路302和可调谐电抗元件310。控制电路302可以包括DC-DC转换器304、一个或多个数模转换器(DAC)306和一个或多个相应的缓冲器308,以放大由每个DAC产生的电压。所放大的信号可以馈送至如图5中示出的一个或多个可调谐电抗组件504、506和508,图5描述了可调谐电抗元件310的可能电路配置。在该说明中,可调谐电抗元件310包括三个可调谐电容器504-508和具有固定电感的电感器502。也可以由本公开预想可能的其它电路配置。
可调谐电容器504-508可以各自利用使能所述组件的电容的可调谐性的技术。可调谐电容器504-508的一个实施例可以利用电压或电流可调谐介电材料,如钛酸钡锶(BST)化合物。BST化合物的示例是
Figure BDA00002622443000041
可调谐电容器。在另一实施例中,可调谐电抗元件310可以利用半导体变抗器。由本公开可以预想可以支持电压或电流可调谐电抗元件的方式的当前或下一代方法或材料构成。
DC-DC转换器304可以从图1中通信设备100的电源114中接收如3V的功率信号。如图所示,DC-DC转换器304可以使用普通技术,将该功率信号放大为更大范围(例如,30V)。控制器106可以通过由“n”或更多条线构成的控制总线,向每个DAC 306提供数字信号,以单独控制可调谐电容器504-508的电容,从而改变可调谐匹配网络202的集合电抗(collective reactance)。可以以双线普通串行通信技术(如,串行外设接口(SPI)总线)来实现控制总线。利用SPI总线,控制器106可以提供串行化数字信号来配置图3中的每个DAC、或图4的可调谐电抗元件404的开关。图3的控制电路302可以利用普通数字逻辑来实现SPI总线,并将控制器106提供的数字信号送往DAC。
在另一实施例中,可调谐匹配网络202可以包括解码器形式的控制电路402、以及包括如图6所示的包括可开关电抗元件的可调谐电抗元件404。在该实施例中,控制器106可以经由SPI总线给控制电路402提供信号,可以利用普通布尔或状态机逻辑对该信号进行解码,以单独启用或禁用开关元件602。可以利用半导体开关或如在微机电系统(MEMS)中使用的微机械开关来实现开关元件602。通过利用开关元件602来独立地启用和禁用图6的电抗元件(电容器或电感器),可以改变可调谐电抗元件404的集合电抗。
可调谐匹配网络202、204的可调谐性向控制器106提供了用于优化收发机102的性能参数的手段,性能参数例如但不限于发射机功率、发射机效率、接收机灵敏度、通信设备的功耗、人体对能量的特定吸收率(SAR)、频带性能参数等。
为了实现设计者可以定义的一个或多个期望性能特性,通信设备100可以置于如图7所示的无回音室706中。在该配置中,设计者可以执行通信设备100的性能参数(如总辐射功率(TRP)、总各向同性灵敏度(TIS)或辐射谐波测量、接收机效率、发射功率效率和功耗等)的校准测量。针对多频带通信设备100,可以逐个频带或逐个子带执行校准测量。
此外,可以在利用模拟人体组成的人体模型来使用通信设备100的多个情况下执行校准测量。例如,具有翻盖设计的外壳组件的通信设备100在打开翻盖时会被置于紧邻人体模型的耳朵,以模拟典型的会话使用情况。在例如用户利用蓝牙耳机时或通信设备100处于待机模式时的无需手的应用中,通信设备100可以关上翻盖并被置于人体模型的臀部。可以针对例如通信设备100被握在人体模型的手中但远离人体模型的头部的情况下,对于天线拉起或放下、免提特征“开”之类的其它使用情况来执行校准。如果需要,任何数量的使用情况可以应用于每个频带和子带。
图7示出了具有可调谐匹配网络的通信设备(例如,图1中的设备100)部分700的示例性实施例,可调谐匹配网络可以包括多个组件,例如,定向耦合器710、检测器720、高电压专用集成电路(HVASIC)730、和调谐器740(例如,自适应阻抗匹配模块(AIMM)调谐器)。可调谐匹配网络可以包括除了或代替所示组件的各种其他组件,包括上述关于图1-6描述的组件。可调谐匹配网络可以耦合至天线780和收发机(或发射机和/或接收机),以便于通信设备和其他设备或系统之间的信号通信。在该示例性实施例中,通信设备700接近干扰源790,干扰源790干扰设备的信号发射和接收。描述了各种RF级别,包括0至+33dBm的发射级别的期望范围。本公开考虑利用或遇到其他RF级别。如所见,引入干扰源790可以造成设备700的不期望调谐。
图8示出了具有可调谐匹配网络的通信设备(例如,图1中的设备100)部分800的示例性实施例,可调谐匹配网络可以包括多个组件,例如,耦合器810、检测器820、高电压专用集成电路(HVASIC)830和调谐器840(例如,自适应阻抗匹配模块(AIMM)调谐器)。可调谐匹配网络可以包括除了或代替所示组件的各种其他组件,包括上述关于图1-6描述的组件。可调谐匹配网络可以耦合至天线880和收发机(或发射机和/或接收机),以便于通信设备和其他设备或系统之间的信号通信。在该示例性实施例中,通信设备800接近干扰源890,干扰源890扰乱调谐器控制回路,例如,设备对天线VSWR的测量。
设备800可以包括实现检测干扰源并且基于干扰源检测来调整调谐技术的一个或多个组件。例如,在一个示例性实施例中,AIMM算法可以用作调谐状态查找表,但是在进行有效测量时要受到调谐状态更新。当确定测量无效时,设备对于特定使用情况可以利用最后的已知有效调谐状态。也可以利用对调谐技术其他调整。例如,可以将调谐延迟预定时间段,直到进行有效测量为止。在另一实施例中,如果在预定时间段内不能进行有效测量,则可以利用针对特定使用情况的最后的已知有效调谐状态进行调谐。
在一个实施例中,可以保持设备800内天线之间的隔离,以便降低在耦合器输出处检测到的内部产生的干扰源(例如,WiFi和蓝牙)的功率。所利用的隔离的具体级别可以变化。在2011年1月12日递交的美国专利申请No.13/005,122中描述了通信设备中多个天线系统的示例,例如分集天线系统,其全部内容通过引用合并于此。
在另一实施例中,一个或多个滤波器850可以耦合至耦合器810。滤波器的具体类型可以变化,并且可以包括BT/WiFi带阻滤波器或BP滤波器。例如,这些滤波器可以是频带抑制或频带“抽出”电路。滤波器可以是耦合至耦合器810的反射输出的单个滤波器,但是本公开设想耦合至耦合器的两个输出的滤波器。在一个实施例中,2.4GHz带阻滤波器可以耦合至定向耦合器的输出端口,但是也可以利用其他滤波范围。
在一个实施例中,滤波器860(例如,BP滤波器)可以合并到耦合器810中。例如由于耦合器可以构建为多层电介质结构,因此滤波器元件可以合并到该结构中,以部署期望的频带抑制或带阻滤波器类型。
尽管在前实施例描述了使用定向耦合器来检测可调谐匹配网络的VSWR或阻抗,作为针对控制可调谐网络的算法的反馈源,但是还存在其他可能组件、技术和/或手段来确定网络的阻抗,或者向设计为调谐可调谐匹配网络的算法供应输入。用于确定阻抗匹配的已知方法也可以与本文描述的示例性实施例一起使用。应当注意,本文描述的避免和减轻干扰信号的技术可以应用于确定控制算法的反馈的其他手段。
在另一实施例中,峰值检测器870和均值检测器875可以耦合至或者包括在传感器IC 820内,以例如通过将恒定包络信号上的正向输出信号与反向输出信号相比较来确定幅度调制的存在。在一个实施例中,对正向信号和反向信号之差的峰值和均值测量可以忽略发射机的有意调制,但是根据拍音来检测幅度调制,拍音是由同时存在的期望信号和干扰信号的组合产生的。
本文描述的示例性实施例允许通信设备减轻干扰源的影响,干扰源产生影响通信设备的干扰。在一个实施例中,设备可以实现多线程天线调谐算法。例如,开环查找表可以操作以存储每个频带、子带、机械位置、扬声器状态等(使用情况)的标称调谐状态。在发射时,算法可以运行来确定是否可以找到更好的调谐状态,并且可以继续改善调谐状态。当算法找到针对操作的特定使用情况的更好调谐状态时,可以替换查找表中的调谐状态。可以在允许算法更新调谐状态之前,检测每个回波损耗(RL)或阻抗测量的有效性。如果RL测量被视为无效(例如,针对单次迭代),则调谐器状态可以不变。
方法900可以从步骤902开始,在步骤902中,对RF信号进行分析,以便使用上述一个或多个组件和/或系统(包括AIMM调谐器840)执行阻抗匹配。在一个实施例中,AIMM算法可以用作调谐状态的查找表,调谐状态的查找表可以基于被确定为有效的测量来更新。方法900可以基于闭环和/或开环反馈。例如,可以与开环反馈相组合地使用闭环反馈来分析RF信号,例如基于与设备的物理状态(例如,在翻盖打开位置)相关的存储信息来分析RF信号。本公开还设想仅基于开环反馈或仅基于闭环反馈来执行方法900的一个或多个步骤。在步骤904中,可以基于分析和上述反馈来确定调谐状态。
然后在步骤906中可以确定测量有效,以例如检测干扰源的存在。可以按照多种不同方式来执行有效性。在一个实施例中,可以随时间进行多次回波损耗相位测量。可以进行最大值与最小值的比较,并且有效性可以基于小于预定阈值的范围。例如,如果仅针对一些测量存在干扰信号,则可以认为干扰信号的相位与发射正向和反射信号的相位不同。测量的定时可以足够长,使得WiFi或其他干扰发射的一个突发不应存在于所有测量中,并且至少一个测量应当落在发射突发之间。在另一实施例中,可以关于与相位测量一致的正向功率测量和反向功率测量(幅度)来处理测量,以确定哪些测量是有效的,以及哪些测量是在存在干扰源的情况下进行的,并且仅忽略这些测量,而在算法计算中使用有效测量。
在检测器是完整接收机的另一实施例中,可以将正向解调数据与反向解调数据相比较来检测干扰。例如,可以在正向的和接收到的采样信号路径(例如图8中所示)两者中使用作为检测器的完整接收机。这些接收机可以特别调谐至发射信号的频率,并因此可以忽略不在相同频率或信道上的任何干扰信号。这种方案可以在正常实现方式中消除实质上所有可能的干扰信号。同样,在该示例中,正向采样和反向采样应当具有与期望发射信号相同的调制。如果存在干扰源,则接收机可以具有选择性以忽略干扰源,或者接收信号可以被扰乱,并且解调数据不与期望发射数据相匹配。在后一种情况下,对正向和反向功率的测量可以由于无效而被忽略。
在一个实施例中,采用多个快速采样来检测指示干扰的峰值/空。例如,与期望信号混合的干扰信号可以创建幅度中的“拍音”。通过以极高速度进行幅度测量,方法900可以检测有效的幅度调制。如果幅度调制超过期望发射信号调制,则可以将该测量指定为无效。
在另一实施例中,对相位测量进行分析并与针对不稳定漂移的阈值相比较(例如,应用50欧姆排除)。非相干信号之间(例如,干扰源与期望信号之间)的相位测量可以给出随机结果。相干信号(例如,正向信号和反射信号)之间的接近59欧姆的相位测量也可以给出随机结果。并不非常接近于50欧姆的相干信号之间相位测量相对稳定。如果相位信号是不稳定的(例如,两个读数之间的变化超过特定量,或标准偏差大于特定值的,或者检测不稳定测量的一些其他方法),则反射信号可以是干扰源。在一个实施例中,仅当存在不稳定相位并且回波损耗大于特定值(远离50欧姆)时,才停止算法。
在另一实施例中,可以在发射期间以及当发射机关闭时执行采样。例如,在WCDMA/CDMA中使用DTX,以找到发射机关闭的时间。在GSM或其他时分系统中,可以使用发射突发之间的间隔。可以与阈值比较并且应用于反射输入。如果发射期间的测量电平太接近发射机关闭时的电平,则可以将测量视为无效。在一个实施例中,可以使用多次测量来检测脉冲式干扰源。
在一个实施例中,基于检测到的反射输入(当不发射时)的AIMM接通阈值和反射损耗(RL)目标可以变化。当发射机不活动时,可以进行对反射端口的测量。该测量可以用于检测干扰源并且测量干扰源的幅度。干扰源的幅度可以用于设置反射功率的阈值,在该阈值以下可以将测量视为无效。干扰源电平也可以用于调节在干扰源条件下算法的品质因数的RL目标。
在另一实施例中,可以在已知发射功率电平变化之前和之后均执行测量,并且可以将变化与预测变化相比较。例如,蜂窝手持机控制器知道正发射的功率电平,以及还知道发射功率电平的任何有意变化的大小。为了测试干扰源的存在,调谐可以保持静态,并且可以测量检测到的功率/回波损耗。如果检测到的功率测量变化不在已知有意变化的预设容限内,则可以确定测量被干扰源劣化,并且可以将测量视为无效。
在一个实施例中,如果检测到的RL大于零,则可以阻止调谐。例如,如果测量的RL大于零(或者允许测量不确定性或其他变化的预定值),则确定了干扰源的存在。预定值还可以包括特定应用中调谐器和天线负载的设计知识。
如果确定测量有效,则可以如在步骤910中执行调谐,以实现阻抗匹配。另一方面,如果测量被视为无效(例如,通过干扰源的存在),则算法可以忽略最后的输入,并且保持如步骤910中的先前调谐状态。然后算法可以继续正常进行,并且进行后续调度的测量,再评价这些测量的有效性。算法可以保持最后知道的良好调谐状态,直到有效测量允许算法根据品质因数继续调谐匹配网络为止。
方法900可以在确定测量的有效性和检测干扰源的存在时应用多个阈值。例如,蜂窝手持机控制器知道正发射的功率电平。如果已知的发射功率电平在预定阈值以下,则可以禁用AIMM算法。
检测到的干扰电平可以用于设置AIMM开/关控制。例如,可以使超过特定阈值的反射功率测量无效。阈值可以是动态的,并且根据已知的发射功率电平来设置,并且也可以根据当前正调谐的特定频道/使用情况的RL目标来设置。作为另一示例,可以监视检测到的正向功率电平。蜂窝手持机控制器知道正发射的功率电平。如果检测到的正向功率不在期望电平的设定限值内,则可以将正向功率和反射功率的测量视为无效。
在一个实施例中,利用基于相位的调谐算法(使用阻抗目标),可以将基于已知技术的预测RL改进与实际测量的RL改进相比较。利用RL相位信息和查找表(LUT)(预定开环典型调谐状态值)或计算(使用已知/期望的调谐器LUT),可以预测天线阻抗,并且相应地可以确定设置调谐器的调谐状态,以便实现期望的匹配。在改变调谐状态之后,如果RL/阻抗的变化不在期望结果的预定阈值内,则可以确定测量被干扰源劣化,并且被视为无效。可以将调谐器恢复到其最后的已知良好或有效的调谐状态(例如缺省状态)。
在另一实施例中,可以将调谐范围限制为在已知干扰源频率下增加调谐器衰减。
在典型实施例中,在电路中可以存在附加限制,例如,能够影响自适应调谐网络所使用的检测信号的有效性的、来自蜂窝手持机或其他无线电装置内或者在无蜂窝手持机或其他无线电装置的情况下的非相干信号所引起的噪声阈值。尽管本说明书的主要部分描述了这些限制的来源作为干扰信号,但是本发明不限于仅对这种信号的考虑。示例实施例可以用于基于影响通信设备的所有类型干扰或不期望条件来调谐通信设备中的可变匹配网络。示例性实施例可以对确定调谐状态的调谐算法应用异常检测。
在一个实施例中,可以实现消除滤波器带宽外的干扰源的低通滤波器。可以使用正交混合器来避免由于同相的正向和反射信号而引起的相消。组件的具体配置可以变化。例如,可以利用低通滤波器和90度移相器,并且可以将低通滤波器和90度移相器合并到收发机组件中,或与收发机组件相分离地实现。在一个实施例中,可以使用以两倍于频率运行的VCO,并且触发器可以用于分频。
在总体上在图10和11中示出的示例性实施例1000及其对应的频率图1100中,可以使用低通滤波器(LPF)来减少或消除滤波器带宽之外的所有干扰源。可以通过在模拟或数字域中组合fp_I_flt,fp_Q_flt,rp_I_flt,rp_Q_flt来获得回波损耗幅度和/或相位。可以使用正交混合器来避免由于RF和LO同相而引起的相消。可以以足够低的值来设置一个或多个LPF,使得可以去除AM调制。
在一个实施例中,使用正向信号作为实施例100的检测IC上I和Q混合器的LO。这不需要收发机IC来提供LO信号。该方法的另一优点在于,在LO信号上存在发射调制。调制包络可以由混合器消除。由于调制被消除,基带低通滤波器可以更宽,与必须将LPF设置为足够低来滤除调制的情况相比实现了更快的测量。当使用正向信号作为LO时,可以采用BPF通过衰减已经耦合到正向信号上的任何干扰来改善性能。
该示例性实施例设想使用与发射机相同的LO或者使用不同的LO,例如,可以使用与发射机锁相的单独LO(例如,由IC检测器产生)。
在总体上在图12中示出的示例性实施例1200中,可以结合功率和相位检测器和用于调谐和滤除干扰的其他控制逻辑,来使用低通滤波器(LPF)。在一个实施例中,可以对ph1进行扫频,以最大化节点G,而同时对ph2进行扫频,以最大化节点G2。其他组件可以与实施例1200一同使用,例如,幅度检测器和/或相位调制器。可以计算RL和相位。
在总体上在图13中示出的另一示例性实施例1300中,可以执行关于图12描述的扫频和计算。可以在功率放大(PA)之前从发射机获取LO。例如,可以从到PA的输入中获得LO,PA对于调谐组件而言是更易接入的。PA可以提供与任何干扰源的隔离,并且提供干净的LO。限幅器可以用于去掉幅度调制的包络。
在总体上在图14中示出的另一示例性实施例1400中,可以执行关于图12描述的扫频和计算。可以从正向功率(FP)获取LO。可以对FP进行滤波以减小干扰源对LO的影响。在该实施例中,RF耦合器和带通滤波器可以集成,例如,由相同陶瓷结构制成。
在1200-1400的实施例中,通过ADC的感测DC电压可以用来控制ph1和ph2。当ph1、ph2是使得DC电压最大化时,那么进入混合器的两个信号被视为同相。ph 1可以被调整为增加或者使正向功率测量最优。ph2也可以被调整为增加或者使反射功率测量最优。当混合器的两个输入之间的相位差为零度时可以检测到功率。这些示例性实施例可以确保相位差不会贡献于功率测量。可以根据功率测量来计算RL,并且相位差等于ph2-ph1。可以在确定了功率测量之后计算相位差,以实现稳定的相位误差测量。限幅器可以去除对发射信号的幅度调制(期望或不期望的调制)。限幅器可以用作对正向功率信号的滤波器。干扰信号可以作用于增大进入混合器的PF时钟上的抖动,并且可以产生奇次谐波。可以在测量的RF信号路径中使用相位延迟来确保ph1和ph2不变为负。可以使用放大器,但是在一个实施例中,仅针对混合器的动态范围要求使用放大器。基带低通滤波器可以抑制滤波器带宽之外的干扰源。LPF也可以用于滤除对调制信号的AM。如果AM保持,则可以同时对正向信号和反射信号进行采样。也可以使用多个采样来避免空。
在总体上在图15中示出的示例性实施例1500中,带通和低通滤波器(BPF和LPF)可以与共享的限幅器一同使用。共享的限幅器可以用于减小发射测量与反射测量之间的相位误差。也可以使用各种其他组件和配置来降低电流消耗和/或缩减管芯面积。该实施例允许获得基于经滤波的正向功率的数据。
在总体上在图16中示出的示例性实施例1600中,带通和低通滤波器(BPF和LPF)可以与共享的延迟时钟一同使用。可以使用共享的延迟时钟来允许仅由ph2确定相位差。尽管未示出,带通滤波器可以与图12-15中描述的一个或多个其他组件一同使用。在一个示例中,实施例1600可以将来自正向功率的相移LO用于反向功率。
图17示出了可以用于本文描述的一个或多个调谐实施例(例如,针对GSM/EDGE设备)的时序的示例。可以在时隙3和4中指示的时间段处进行正向和反向功率测量。如果在发射突发外检测到的功率在阈值以上,则可以将突发期间进行的测量视为无效。在该实施例中,帧是4.615ms,并且时隙是577μs,然而也可以使用其他时间段。
图18示出了可以用于本文描述的一个或多个调谐实施例(例如,针对WCDMA设备)的时序的示例。可以在图18中指示的时间段处进行正向和反向功率测量。如果在发射突发外检测到的功率在阈值以上,则可以将发射期间进行的测量视为无效。
许多技术可以用于使回波损耗测量有效。在以下情况下可以将测量视为无效:进行反射端口的多次快速测量,并且检测超过已知包络调制的幅度变化;发射的多次快速测量减去反射的值示出了幅度变化(该方法可以取消发射调制并且检测干扰拍音);并且在发射期间进行多次快速测量,测量之间的过度的相位变化可以指示干扰源,以及测量范围是否超过设定阈值。在一个实施例中,当使用“一步式”调谐方法(使用阻抗测量来调谐到已知匹配)时,在期望阈值内的调整之后没有看到RL,这将使调谐步骤无效,并且算法返回到最后的已知良好调谐状态。
附加的有效性方法例如通过使用峰值和均值检测器。例如,正向和反向测量可以与峰值和均值检测器一同操作,并且进行比较。如果误差以设定阈值超过了期望(调制)峰均比,则将测量视为无效。使用对正向求和信号减去反向求和信号的峰值和均值检测可以取消发射调制,并且任何差异应当归因于干扰,并且因此与针对无效性的设定阈值相比较。
在总体上在图19中示出的示例性实施例1900中,可以使用Costas环,其中依赖正向功率来锁定本地振荡器。在可以将LO前面的LPF设定在足够低的频率下以剥离TX波形的角度调制。在另一实施例中,当干扰源的级别足够低时,不需要滤波器。实施例1600可以使用锁相到正向功率的内部LO,而不需要外部LO。
从上述描述中,本领域技术人员显而易见的是,在不偏离以下描述的权利要求的范围和精神内可以修改、减少或增强上述实施例。例如,对干扰源的检测可以用于确定是否执行确定可调谐状态的算法。例如,对干扰源的检测可以使设备基于开环反馈而不是闭环反馈来确定调谐状态。此外,本文描述的一个或多个步骤可以由收发机的组件来执行。这可以包括将特定组件合并到收发机中,或者使用已经存在的收发机组件。其他适合的修改可以应用于本公开。因而,读者面向权利要求以全面理解本公开的宽度和范围。
图20示出了计算机系统2000形式的机器的示例性图示,当执行该计算机系统内的指令集时,指令集可以使机器执行这里所公开的方法中的任何一个或多个。在一些实施例中,机器以独立设备操作。在一些实施例中,机器可以(例如使用网络)与其它机器连接。在连网部署中,机器可以在服务器-客户端用户网络环境中以服务器或客户端用户机器的能力进行操作,或者作为对等(或分布式)网络环境中的对等机器进行操作。
机器可以包括服务器计算机、客户端用户计算机、个人计算机(PC)、平板PC、膝上型计算机、台式计算机、控制系统、网络路由器、开关或网桥、或能够执行规定了要由机器采取的行动的指令集(顺序地或其它)的任何机器。将会理解,本公开的设备广泛地包括提供语音、视频或数据通信的任何电子设备。此外,尽管示出了单个机器,还应当认为术语“机器”包括单独或联合执行指令集(或多个指令集)以执行这里所讨论的任何一个或多个方法的机器的任意集合。
计算机系统2000可以包括处理器2002(例如,中央处理单元(CPU))、图形处理单元(GPU,或二者)、主存储器2004和静态存储器2006,它们经由总线2008彼此通信。计算机系统2000还可以包括视频显示单元2010(例如,液晶显示器(LCD)、平板、固态显示器或阴极射线管(CRT))。计算机系统2000可以包括输入设备2012(例如,键盘)、光标控制设备2014(例如,鼠标)、盘驱动单元2016、信号生成设备2018(例如,扬声器或遥控器)和网络接口设备2020。
盘驱动单元2016可以包括在其上存储了一个或多个指令集(例如,软件2024)的机器可读介质2022,该指令集具体实现这里所描述的方法或功能中的一个或多个,包括以上描述的方法。在由计算机系统2000执行期间,指令2024也可以完全或至少部分地驻留在主存储器2004、静态存储器2006和/或处理器2002内。主存储器2004和处理器2002也可以构成机器可读介质。
包括但不限于专用集成电路、可编程逻辑阵列和其它硬件设备的专用硬件实施方式可以同样被构建以实现这里所描述的方法。可以包括各个实施例的设备和系统的应用广泛地包括各种电子和计算机设备。一些实施例利用模块间和通过模块通信的相关控制和数据信号实现在两个或更多特定互连硬件模块或设备中的功能,或将其作为专用集成电路的一部分。因而,示例性系统可应用于软件、固件和硬件实施方式。
根据本公开的各种实施例,这里所描述的方法意在作为在计算机处理器上运行的软件程序进行操作。此外,软件实施方式可以包括但不限于,分布式处理或组件/对象分布式处理、并行处理、或也可以将虚拟机器处理构建为实现这里所描述的方法。
本公开预想包含指令2024、或者接收并执行来自传播信号的指令2024的机器可读介质,从而与网络环境2026连接的设备可以发送或接收语音、视频或数据,以及使用指令2024在网络2026上通信。还可以经由网络接口设备2020在网络2026上发送或接收指令2024。
尽管在示例实施例中示出了机器可读介质2022为单个介质,术语“机器可读介质”应被理解为包括用于存储一个或多个指令集的单个介质或多个介质(例如,集中式或分布式数据库,和/或相关高速缓存器和服务器)。术语“机器可读介质”也可以被理解为包括能够存储、编码或承载由机器执行并使机器执行本公开的任何一个或多个方法的指令集的任何介质。
术语“机器可读介质”因而被理解为包括但不限于:固态存储器,例如存储器卡或其它容纳一个或多个只读(非易失性)存储器、随机访问存储器或其它可重写(易失性)存储器的其它封装;诸如盘或带之类的磁光或光介质;和/或电子邮件的数字文件附件,或者被认为是等同于有形存储介质的分布介质的其它自含信息存档或存档集。因而,认为本公开包括这里所列出的、包括技术上理解的等同物或后继介质的、存储了软件实施方式的机器可读介质或分布介质中的任何一个或多个。
尽管本说明书参照特定标准和协议描述了在实施例中实现的组件和功能,但本公开并不限于这种标准和协议,每个因特网标准和其它分组交换网络传输(例如,TCP/IP、UDP/IP、HTML、HTTP)表示当前技术的示例。这些标准定期地被具有基本相同功能的更快或更有效的等同物来取代。因而,具有相同功能的替换标准和协议被认为是等同物。
这里所描述的实施例的说明意在提供对各种实施例的结构的一般性理解,并不意在用作可以利用这里所描述的结构的设备和系统的所有元件和特征的完全描述。在阅读了以上描述时,许多其它实施例对于本领域技术人员来说将是显而易见的。可以利用并得出其它实施例,从而可以在不偏离本公开的范围的情况下做出结构和逻辑上的替换和改变。附图也仅是表示性的,并没有按比例绘出。可以放大特定部分,而将其它部分最小化。因此,以示意性而非限制性方式来看待说明书和附图。
可以通过术语“发明”单独和/或共同地指示本发明主旨的这些实施例,这仅是为了方便,如果实际上公开了多于一个,并不意在将该申请的范围主动限制为任何单个发明或发明概念。因此,尽管这里示出并描述了特定实施例,应当理解,被计算为实现相同目的的任何设置都可以用于替换所示出的特定实施例。该公开意在覆盖各种实施例的任意和全部适配物或变体。在阅读了以上描述时,这里并未特别描述的以上实施例的组合以及其它实施例对于本领域技术人员来说将是显而易见的。
提供本公开的摘要以允许读者快速确定本技术公开的性质。摘要的提交被理解为其并不用于解释或限制权利要求的范围或含义。此外,在以上具体实施方式中可以看出,在单个实施例中将各种特征集合在一起,以便使本公开流线化。本公开的方法并不被解释为反映以下意图:所要求保护的实施例需要比每个权利要求中明确表述的更多的特征。而是被解释为:所附权利要求反映了本发明的主旨在于比单个所公开的实施例的全部特征少。因此,这里将所附权利要求并入具体实施方式,每个权利要求本身代表单独的所要求保护的主旨。还应当设想一个实施例中的特征可以与另一实施例中的特征一同使用。

Claims (35)

1.一种匹配网络,包括:
可调谐电抗电路,配置为耦合至通信设备的发射机部分和接收机部分中的至少一个,
其中可调谐电抗电路可调整到多个调谐状态,并且对调谐状态的确定是基于确定检测到的信号测量是否无效,并且基于来自可调谐电抗电路的开环或闭环反馈配置中的至少一个的信息。
2.根据权利要求1所述的匹配网络,其中,对调谐状态的确定由通信设备的控制器来执行。
3.根据权利要求1所述的匹配网络,其中,可调谐电抗电路包括以下中的至少一个:一个或多个电压可调谐电容器、一个或多个半导体变抗器、一个或多个微机电系统(MEMS)变抗器、一个或多个半导体开关电容器、一个或多个MEMS开关电容器、以及一个或多个铁电电容器。
4.根据权利要求1所述的匹配网络,其中,可调谐电抗电路包括信号采样网络,其中信号采样网络的信号输出耦合有滤波器。
5.根据权利要求4所述的匹配网络,其中,信号采样网络包括定向耦合器。
6.根据权利要求1所述的匹配网络,其中,可调谐电抗电路操作用于:
当检测到的信号测量有效时,基于来自闭环反馈配置的信息将调谐状态改变到不同的调谐状态;并且
当检测到的信号测量无效时,使用最后的已知有效调谐状态和缺省调谐状态之一。
7.根据权利要求1所述的匹配网络,其中,可调谐电抗电路操作用于基于以下中的至少一个来确定检测到的测量的有效性:在一段时间上测量的电压驻波比(VSWR)数据、幅度调制、发射和非发射期间测量的反射输入、在标准偏差外的相位测量、测量的发射功率电平变化和预测的发射功率电平变化的比较、以及调谐状态之间反射损耗的测量改进和预测改进的比较。
8.根据权利要求1所述的匹配网络,其中,可调谐电抗电路包括以下中的至少一个:具有可调谐介电常数的一个或多个电容器、以及具有由一个或多个微机电系统(MEMS)开关和一个或多个半导体开关之一控制的固定电容的一个或多个电容器。
9.根据权利要求1所述的匹配网络,其中,检测到的测量的无效性由产生对通信设备干扰的信号的移动设备引起。
10.根据权利要求1所述的匹配网络,其中,检测到的测量的无效性由通信设备产生的内部干扰引起。
11.一种非暂时性计算机可读存储介质,包括进行以下操作的计算机指令:
确定检测到的测量的有效性;并且
确定具有可调谐电抗的匹配网络的调谐状态,对调谐状态的确定是基于检测到的测量是否有效,并且基于来自开环和闭环反馈配置中的至少一个的信息。
12.根据权利要求11所述的存储介质,包括以下计算机指令:当检测到的测量有效时,基于来自闭环反馈配置的信息将调谐状态改变到不同的调谐状态。
13.根据权利要求11所述的存储介质,包括以下计算机指令:当检测到的测量无效时,使用先前确定的调谐状态。
14.根据权利要求11所述的存储介质,包括以下计算机指令:基于在一段时间上测量的电压驻波比(VSWR)数据来确定检测到的测量的有效性。
15.根据权利要求11所述的存储介质,包括以下计算机指令:基于幅度调制来确定检测到的测量的有效性。
16.根据权利要求11所述的存储介质,包括以下计算机指令:基于发射期间和非发射期间测量的反射输入电平来确定检测到的测量的有效性。
17.根据权利要求11所述的存储介质,包括以下计算机指令:基于在预定偏差外的相位测量来确定检测到的测量的有效性。
18.根据权利要求11所述的存储介质,包括以下计算机指令:基于测量的发射功率电平变化和预测的发射功率电平变化的比较来确定检测到的测量的有效性。
19.根据权利要求11所述的存储介质,包括以下计算机指令:基于反射损耗的测量改进和预测改进的比较来确定检测到的测量的有效性。
20.根据权利要求11所述的存储介质,其中,匹配网络包括以下中的至少一个:一个或多个电压可调谐电容器、一个或多个半导体变抗器、一个或多个微机电系统(MEMS)变抗器、一个或多个半导体开关电容器、一个或多个MEMS开关电容器、以及一个或多个铁电电容器。
21.一种方法,包括:
检测对通信设备的干扰;并且
基于对干扰的检测来确定通信设备的可变匹配网络的调谐状态。
22.根据权利要求21所述的方法,包括:基于来自可变匹配网络的开环和闭环反馈配置中的至少一个的信息来确定调谐状态。
23.根据权利要求21所述的方法,包括:基于以下中的至少一个来检测干扰:在一段时间上测量的电压驻波比(VSWR)数据、幅度调制、发射和非发射期间测量的反射输入、在预定偏差外的相位测量、测量的发射功率电平变化和预测的发射功率电平变化的比较、以及反射损耗的测量改进和预测改进的比较。
24.根据权利要求21所述的方法,包括:
当没有检测到干扰时,基于来自闭环反馈配置的信息将调谐状态改变到不同的调谐状态;并且
当检测到干扰时,使用最后的已知有效调谐状态。
25.一种通信设备,包括:控制器,用于确定可变匹配网络的调谐状态,可变匹配网络控制通信设备的接收机部分和发射机部分中的至少一个的一个或多个操作特性,其中,控制器操作用于:
检测干扰源的存在;并且
基于是否存在干扰源以及基于来自开环或闭环反馈配置中的至少一个的信息,来确定调谐状态。
26.根据权利要求25所述的通信设备,其中,所述控制器操作用于基于以下中的至少一个来确定干扰源的存在:在一段时间上测量的电压驻波比(VSWR)数据、幅度调制、发射和非发射期间测量的反射输入、在预定偏差外的相位测量、测量的发射功率电平变化和预测的发射功率电平变化的比较、以及反射损耗的测量改进和预测改进的比较。
27.根据权利要求25所述的通信设备,其中,控制器操作用于:
当不存在干扰源时,基于来自闭环反馈配置的信息将调谐状态改变到不同的调谐状态;并且
当存在干扰源时,使用先前确定的调谐状态。
28.根据权利要求25所述的通信设备,其中,可变匹配网络包括电压可调谐电介质和定向耦合器,其中,定向耦合器可操作地与滤波器连接。
29.根据权利要求25所述的通信设备,其中,可变匹配网络包括以下中的至少一个:具有可调谐介电常数的一个或多个电容器、以及具有由一个或多个微机电系统(MEMS)开关和一个或多个半导体开关之一控制的固定电容的一个或多个电容器。
30.一种方法,包括:
检测对通信设备的干扰;
基于与所述干扰相关联的参数来确定通信设备的可变匹配网络的调谐状态;并且
基于确定的调谐状态来调整可变匹配网络。
31.根据权利要求30所述的方法,包括:当不存在干扰时,基于最后的已知调谐状态来调整可变匹配网络。
32.一种方法,包括:
检测对通信设备的干扰,其中干扰来源于另一通信设备;并且
基于检测到的干扰,来确定通信设备的可变匹配网络的调谐状态。
33.一种非暂时性计算机可读存储介质,包括以下计算机指令:
确定对通信设备的干扰;并且
基于与所述干扰相关联的参数来调整通信设备的可变匹配网络的调谐状态。
34.根据权利要求33所述的存储介质,其中,所述参数包括出现频率、持续时间和幅度中的至少一个。
35.一种匹配网络,包括:
可调谐电抗电路,配置为耦合至通信设备的发射机部分和接收机部分中的至少一个;
其中可调谐电抗电路可调整到多个调谐状态,其中对调谐状态的确定是基于与检测到的干扰相关联的参数。
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