WO2012037892A1 - 一种天线自适应匹配的方法及装置 - Google Patents

一种天线自适应匹配的方法及装置 Download PDF

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Publication number
WO2012037892A1
WO2012037892A1 PCT/CN2011/080001 CN2011080001W WO2012037892A1 WO 2012037892 A1 WO2012037892 A1 WO 2012037892A1 CN 2011080001 W CN2011080001 W CN 2011080001W WO 2012037892 A1 WO2012037892 A1 WO 2012037892A1
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Prior art keywords
matching circuit
signal strength
strength value
circuit parameter
value
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PCT/CN2011/080001
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English (en)
French (fr)
Inventor
马凯
杜天波
张珍
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中兴通讯股份有限公司
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Publication of WO2012037892A1 publication Critical patent/WO2012037892A1/zh

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    • 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
    • H04B1/0458Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages
    • 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

Definitions

  • the invention relates to the field of mobile phone television signal receiving in wireless communication, in particular to a method and device for adaptive matching of an antenna. Background technique
  • Mobile TV refers to a technology that uses mobile phones as terminal devices to play TV content.
  • mobile TV systems include Handheld Digital Video Broadcasting (DVB-H), Terrestrial Digital Video Broadcasting System (DVB-T), China Mobile Multimedia Broadcasting (CMMB), and Integrated Services Digital Broadcasting (ISDB-T).
  • DVD-H Handheld Digital Video Broadcasting
  • DVD-T Terrestrial Digital Video Broadcasting System
  • CMMB China Mobile Multimedia Broadcasting
  • ISDB-T Integrated Services Digital Broadcasting
  • the frequency band of the antenna is wide.
  • the receiving performance of the antenna at a certain frequency is related to the return loss of the antenna. The smaller the return loss, the higher the receiving performance of the antenna.
  • the return loss is related to the matching degree of the antenna.
  • the matching degree of the antenna refers to the matching degree between the impedance of the antenna feeding point and the impedance of the matching circuit. The closer the impedance of the antenna feeding point is to the impedance of the matching circuit, the higher the matching degree of the antenna, the antenna is The smaller the return loss, the better the transmission and reception performance of the antenna, and the matching circuit includes a capacitor and an inductor.
  • the impedance value of the matching circuit is constant, but the impedance of the antenna feed point changes with the change of the antenna receiving frequency point. Since the bandwidth of the antenna is wide, the antenna cannot be at all frequency points. The matching degree is very high, that is to say, the antenna cannot have good reception performance at all frequency points, resulting in poor reception signals at some program frequencies, which affects the user experience. Summary of the invention
  • the main object of the present invention is to provide a method and apparatus for adaptively matching antennas, improving mobile TV reception performance and enhancing user experience.
  • the technical solution of the present invention is achieved as follows:
  • the invention provides a method for antenna adaptive matching, the method comprising:
  • the matching circuit parameters of the signal matching according to the signal intensity of the current program frequency point include: receiving a signal strength value of the program frequency point, selecting a matching circuit parameter corresponding to the highest signal strength value, and storing the parameter in the register.
  • the changing the matching circuit impedance comprises: the matching circuit receiving the matching circuit parameter, and changing the capacitance value of the capacitance in the matching circuit according to changing the voltage of the active circuit of the self.
  • the selecting the matching circuit parameter corresponding to the highest signal strength value comprises: comparing the received first signal strength value with a pre-stored signal strength value threshold, determining that the signal strength value threshold is greater than, or matching circuit parameter value range
  • the matching circuit parameters are all marked, the matching circuit parameters corresponding to the first signal strength value are saved in the register, and are associated with the program frequency point, and the matching ends; determining less than the threshold value, and the matching circuit parameter value range
  • the matching circuit parameter is not marked, the matching circuit parameter corresponding to the signal strength value is stored in the register, and is associated with the program frequency point, and other unmarked matching circuit parameters in the matching circuit parameter value range are selected and sent to
  • the matching circuit receives the second signal strength value; if the second signal strength value is greater than the first signal strength value, further compares with the signal strength value threshold, determines that the signal strength value threshold is greater than, or matches circuit parameter values in the matching circuit parameter value range All marked, the matching circuit parameters corresponding to the second signal strength value
  • the method further includes: selecting the program for viewing the program frequency point again, according to the received received signal including the program frequency point.
  • the information is matched with the matching relationship between the saved matching parameter and the program frequency point, and the matching circuit parameter corresponding to the program frequency point in the information of the received signal is obtained and sent to the matching circuit.
  • the present invention also provides an apparatus for antenna adaptive matching, the apparatus comprising: a television chip, a control chip, a register, a matching circuit;
  • a television chip configured to send the information of the received signal to the control chip, and send the signal strength value of the received signal to the control chip;
  • the control chip is configured to receive the received signal information sent by the television chip, receive the signal strength value sent by the television chip, adjust the matching circuit parameter of the matching circuit according to the signal strength value, and match the matching circuit parameter and the program frequency corresponding to the highest signal strength value Points are associated and saved in registers;
  • a register for storing matching circuit parameters and program frequency points
  • the matching circuit is configured to receive a matching circuit parameter sent by the control chip, and change the impedance according to the matching circuit parameter to match the antenna.
  • control chip is specifically configured to receive a signal strength value sent by the television chip, and select a matching circuit parameter corresponding to the highest signal strength value, and save the signal in the register.
  • the matching circuit is specifically configured to: receive a matching circuit parameter sent by the control chip, change a voltage of the active circuit according to the matching circuit parameter, change a capacitance value of the capacitor in the matching circuit, thereby changing an impedance of the matching circuit to the antenna Make a match.
  • control chip is specifically configured to compare the received first signal strength value with a pre-stored signal strength value threshold, determine a threshold greater than the signal strength value, or select a matching circuit parameter.
  • the matching circuit parameters in the value range are marked, the matching circuit parameters corresponding to the first signal strength value are saved in the register, and are associated with the program frequency point; the threshold is less than the signal strength value, and the matching circuit parameter value is determined.
  • the matching circuit parameter corresponding to the signal strength value is stored in the register, and is associated with the program frequency point, and other parameters in the matching circuit parameter value range are selected, sent to the matching circuit, and received.
  • the second signal strength value if the second signal strength value is greater than the first signal strength value, further comparing with the signal strength value threshold, determining that the signal strength value threshold is greater than, and the matching circuit parameters in the matching circuit parameter value range are marked,
  • the matching circuit parameter corresponding to the second signal strength value replaces the matching circuit parameter corresponding to the first signal strength value in the register; if the second signal strength value is less than the threshold value, and the matching circuit parameter value range is determined, there is a matching circuit parameter If there is no mark, the matching circuit parameter corresponding to the second signal strength value is used.
  • the matching circuit parameter corresponding to the first signal strength value saved in the cover register continues to select the next unmarked matching circuit parameter within the range of the matching circuit parameter value; if the second signal strength value is less than the first signal strength value, continue Select the next unmarked matching circuit parameter within the range of matching circuit parameter values.
  • the control chip is further configured to: according to the received program in the signal of the received signal Corresponding relationship between the matching circuit parameters stored in the frequency query register and the program frequency point, obtaining matching circuit parameters corresponding to the received program frequency points, and transmitting the matching circuit parameters to the matching circuit.
  • FIG. 1 is a schematic flow chart of a method for implementing antenna adaptive matching in the present invention
  • FIG. 2 is a schematic flow chart of a method for determining a best match according to a signal strength value according to the present invention
  • FIG. 3 is a schematic structural diagram of an apparatus for implementing antenna adaptive matching in the present invention. detailed description
  • the basic idea of the invention is: selecting a program frequency point, receiving a television signal of a program frequency point, adjusting a matching circuit parameter of the matching circuit according to the signal strength of the received signal, so that the circuit achieves the best match and receives the optimal signal strength.
  • a method for antenna adaptive matching as shown in Figure 1, the specific steps are as follows:
  • Step 101 Select a program frequency point, and receive a television signal of a program frequency point
  • the user can automatically search for the TV signal through the operation interface of the mobile TV chip, and the TV chip searches for the signals of all the program frequencies in the bandwidth one by one.
  • the user selects a program for viewing a certain program frequency point through the operation interface of the mobile phone television chip. If the television chip does not receive the signal of the program frequency point sent by the antenna, the operation interface displays no signal, and if the antenna transmits the received The signal of the program frequency point will display the program picture, and the information of the received signal is sent to the control chip, and the information of the received signal includes the program frequency point.
  • the control chip can be integrated as a function module on other chips of the mobile phone. In the case of integration into the main chip, it can also be set separately in the mobile phone.
  • Step 102 Adjust the received signal strength by adjusting the matching circuit parameter to obtain a best match.
  • the control chip receives the received signal information, sends an indication of the real-time feedback received signal strength to the television chip, and the TV chip receives the real-time feedback sent by the control chip. Receiving an indication of the signal strength, the signal strength value of the current program frequency point received from the antenna is fed back to the control chip in real time.
  • the control chip receives the signal strength value fed back by the TV chip, and selects the matching circuit parameter corresponding to the highest signal strength value as the best match.
  • the specific process is shown in FIG. 2, and the specific steps are as follows: Step 1021: The control chip receives the first signal strength value.
  • the first signal strength value is stored in the register and associated with the program frequency point, and the register may exist independently or may be a storage part of the control chip or other chip, wherein the first signal strength value is the TV chip This Signal strength value when feedback;
  • Step 1022 Compare the first signal strength value with a locally pre-stored signal strength value threshold, and the signal strength value threshold may be self-valued as needed. If the first signal strength value is greater than the signal strength value threshold, it indicates that the first signal strength value is already high enough to clearly watch the program, or the matching circuit parameters within the matching circuit parameter value range are marked, indicating that the matching circuit parameter value is The matching circuit parameters in the range have been output, only the current first signal strength value is the highest, step 1025 is performed; if the first signal strength value is less than the signal strength value threshold, and the matching circuit parameter has a matching circuit parameter within the value range There is no mark, indicating that the matching circuit parameter is not input to the matching circuit, the first signal strength value is not necessarily the highest, and the matching circuit parameter corresponding to the first signal strength value, that is, the current matching circuit parameter is saved in the register, and In association with the first signal strength value and the program frequency point, step 1023 is performed;
  • Step 1023 The control chip selects other matching circuit parameters in the range of matching circuit parameter values that are not marked, and outputs the matching circuit to the matching circuit, and the impedance of the matching circuit changes. At this time, the signal strength received by the television chip changes accordingly, and the television chip will change.
  • the second signal strength value received from the antenna is sent to the control chip, and the second signal strength value is the signal strength value fed back to the control chip after the impedance of the matching circuit is changed; when the matching circuit parameter without the marking is selected, the matching circuit without the marking may be Any choice of parameter range;
  • Step 1024 The control chip compares the magnitude of the second signal strength value with the first signal strength value. If the second signal strength value is greater than the first signal strength value, the second signal strength value is substituted for the first signal strength value in the register. Step 1022, the difference is that the second signal strength value and the signal strength value threshold are compared;
  • step 1025 is performed; if the second signal strength value is less than the signal strength value threshold, and the matching circuit parameter value is There is no matching matching circuit parameter in the range, and the first signal strength value pair stored in the register is covered by the matching circuit parameter corresponding to the second signal strength value.
  • the matching circuit parameters should be associated with the second signal strength value and the program frequency point, and the steps are performed.
  • the TV chip receives the third signal strength value and sends it to the control chip.
  • the control chip compares the third signal strength value received from the television chip with the second signal strength value;
  • step 1023 is performed.
  • Step 1025 When the matching circuit parameter currently sent to the matching circuit is greater than the signal strength value threshold or the matching circuit parameter within the value range of the matching circuit is marked, the matching circuit parameter currently sent to the matching circuit is When the control chip receives the first signal strength value, it outputs the matching circuit parameter to the matching circuit, saves the matching circuit parameter corresponding to the first signal strength value in the register, and associates with the program frequency point, the first signal strength value The corresponding matching circuit parameters are the best match, and the matching ends.
  • the matching circuit parameter refers to a parameter of the control chip input to the matching circuit
  • the matching circuit includes a variable capacitor and an inductor, wherein the variable capacitor is an active voltage-controlled capacitor, and the parameter refers to matching according to different received parameters. Circuit parameters, the voltage of the internal power supply circuit is changed by itself, so that the output capacitance is changed. The correspondence between the parameters and the capacitance can be obtained through the specification of the variable capacitor.
  • the matching circuit parameter value range is a set of matching circuit parameters obtained by coarse adjustment, and is pre-stored in the control chip.
  • the coarse adjustment may be performed by, but not limited to, the following method: connecting an antenna to a matching circuit and accessing a network analyzer, the network analyzer inputting a signal to the circuit connected to the matching circuit, and receiving the antenna and the matching circuit
  • the output signal of the circuit showing the return loss between the input and the output, adjusting the capacitance in the matching circuit, each set of capacitors corresponding to one return loss, obtaining all the capacitances corresponding to less than a certain return loss, according to the capacitance and parameters
  • the default output of the control chip matches the circuit parameters
  • the current matching is sent to the matching circuit.
  • the circuit parameter is a parameter that is output to the matching circuit when the control chip receives the second signal strength value sent by the television chip, and is used as a matching circuit parameter corresponding to the second signal strength value, instead of matching the first signal strength value in the register.
  • the circuit parameters, the matching circuit parameters corresponding to the second signal strength value are the best match, and the matching ends. And so on.
  • control chip deletes the flag of the matching circuit parameter in the value range of the matching circuit parameter saved by itself.
  • Step 103 Watch the TV program through the best match.
  • the television chip searches for a signal, and sends the information of the received signal including the program frequency point to the control chip, and the control chip queries the program frequency in the register according to the program frequency point.
  • the correspondence between the points and the matching circuit parameters obtains the best match of the program frequency points, and sends the best matching matching circuit parameters to the matching circuit to make the received signal reach the best.
  • the present invention also provides an apparatus for antenna adaptive matching, the apparatus comprising: a matching circuit 303, a television chip 301, a control chip 302, and a register 304; wherein the register 304 can be a television chip 301, or a control chip 302 or A part of other chips of the mobile phone may also exist independently; the control chip may be integrated as a function module in other chips of the mobile phone, such as being integrated into the main chip, or may be separately set in the mobile phone;
  • the television chip 301 when the user selects a program frequency point through the operation interface, the signal for receiving the program frequency point sent by the antenna transmits the information of the received signal including the frequency point to the control chip 302; the real-time feedback sent by the receiving control chip 302 Signal strength indication, the signal of the received signal is strong The value is sent to the control chip 302 in real time;
  • the control chip 302 is configured to receive the received signal information sent by the TV chip 301, and send an indication of the real-time feedback signal strength to the TV chip 301. Adjust the signal strength by adjusting the matching circuit parameters to obtain the best matching circuit parameter, and the best match is obtained.
  • the circuit parameter is associated with the program frequency point and stored in the register; the matching circuit parameter refers to the parameter input by the control chip 302 to the matching circuit 303, and the register 304 is configured to save the matching circuit parameter and the corresponding program frequency point;
  • Register 304 configured to save matching circuit parameters and program frequency points
  • the matching circuit 303 includes an active voltage-controlled capacitor and an inductor for outputting different impedance values according to different matching circuit parameters received.
  • One implementation of matching circuit 303 is shown in FIG.
  • the matching circuit 303 is specifically configured to receive the matching circuit parameters sent by the control chip 302, change the voltage of the active circuit according to the matching circuit parameters, change the capacitance of the capacitor in the matching circuit, and thereby change the impedance of the matching circuit.
  • the control chip 302 is specifically configured to receive the signal strength value sent by the TV chip 301, select a matching circuit parameter corresponding to the highest signal strength value, store it in the register 304, and associate it with the program frequency.
  • the control chip 302 is specifically configured to receive the first signal strength value, store the first signal strength value in the register 304, and associate with the program frequency point, and compare the first signal strength value with a locally pre-stored signal strength value threshold.
  • the signal strength value threshold may be self-determined according to requirements. If the first signal strength value is greater than the signal strength value threshold, or the matching circuit parameters within the matching circuit parameter value range are marked, the current output matching circuit parameter is That is, when the first signal strength value is received, the matching circuit parameter outputted to the matching circuit 303, the matching circuit parameter corresponding to the first signal strength value is stored in the register 304, and is associated with the program frequency point, and the first signal strength value corresponds to The matching circuit parameters are the best match, and the matching ends;
  • the matching circuit parameter corresponding to the first signal strength value is saved in In the register 304, the first signal strength value and the program frequency point are associated; the other matching circuit parameters in the matching circuit parameter value range that are not marked are selected, and output to the matching circuit 303, the impedance of the matching circuit 303 is changed, and the television is received.
  • the second signal strength value sent by the chip 301 compares the magnitude of the second signal strength value with the first signal strength value. If the second signal strength value is greater than the first signal strength value, the second signal strength value is substituted for the first in the register 304.
  • the matching circuit parameter corresponding to the second signal strength value is substituted for the matching circuit parameter corresponding to the first signal strength value in the register 304, and the matching ends; if the second signal strength value is less than the signal strength value threshold, and the matching circuit parameter has a value range If there is no matching matching circuit parameter, then continue to select the matching circuit parameter value range He has no matching matching circuit parameters and sends it to the matching circuit 303 for comparing the signal strength value received from the television chip 301 with the second signal strength value, the comparison method and the first signal strength value and the second signal strength value.
  • the comparison method is the same; if the second signal strength value is greater than the first signal strength value, the other unmarked matching circuit parameters in the matching circuit parameter value range are selected and sent to the matching circuit 303 for the signal strength received from the television chip 301. The value is compared with the second signal strength value, and the comparison method is the same as the comparison method of the first signal strength value and the second signal strength value. After the matching is completed, the marking of the matching circuit parameter in the value range of the matching circuit parameter saved by itself is deleted. ;
  • the matching circuit parameter value range is a set of matching circuit parameters obtained by coarse adjustment, and is pre-stored in the control chip 302.
  • the coarse adjustment may be performed by, but not limited to, the following method: connecting an antenna to a matching circuit and accessing a network analyzer, the network analyzer inputting a signal to the circuit connected to the matching circuit, and receiving the antenna and the matching circuit
  • the output signal of the circuit showing the return loss between the input and the output, adjusting the capacitance in the matching circuit, each set of capacitors corresponding to one return loss, obtaining all the capacitances corresponding to less than a certain return loss, according to the capacitance and parameters
  • Correspondence relationship obtain the parameters corresponding to each group of capacitors, that is, match circuit parameters
  • the value range, the certain return loss can be self-valued according to needs, for example, -5dB, wherein the initial parameter of the matching circuit is set to meet the required return loss and the parameter corresponding to the maximum return loss, that is, control
  • the television chip 301 when the user selects to view the program of the program frequency again, the information for transmitting the received signal including the program frequency point is sent to the control chip 302;
  • the control chip 302 is further configured to: obtain a matching circuit parameter corresponding to the received program frequency point according to the correspondence between the matching circuit parameter and the program frequency point stored in the received program frequency point query register, and send the matching circuit parameter to the matching circuit 303.
  • the matching performance of the mobile TV is optimized at different program frequency points, the receiving performance of the mobile TV is improved, and the user experience is enhanced.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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Abstract

本发明公开了一种天线自适应匹配的方法,该方法包括:接收节目频点信号,根据当前节目频点的信号强度调节匹配电路的匹配电路参数,改变匹配电路阻抗,将最高信号强度值对应的匹配电路参数与节目频点相关联。本发明还公开了一种天线自适应匹配的装置,采用本发明所述的方法及装置,提高手机电视接收性能,增强用户体验。

Description

一种天线自适应匹配的方法及装置 技术领域
本发明涉及无线通信中的手机电视信号接收领域, 特别是指一种天线 自适应匹配的方法及装置。 背景技术
手机电视是指以手机为终端设备, 播放电视内容的一项技术。 目前, 手机电视制式有手持数字视频广播 (DVB-H )、 地面数字视频广播系统 ( DVB-T )、 中国移动多媒体广播( CMMB )及综合服务数字广播( ISDB-T ) 等, 此外还有模拟电视制式, 每种手机电视制式的频段都不同, 要兼容多 个制式, 会导致天线的频段很宽。 天线在某一频点的接收性能与天线的回 波损耗有关, 回波损耗越小, 天线的接收性能越高。 回波损耗与天线的匹 配程度有关, 所述天线的匹配程度指天线馈点阻抗与匹配电路阻抗的匹配 程度, 天线馈点阻抗与匹配电路的阻抗越接近, 天线的匹配程度越高, 天 线的回波损耗越小, 从而使天线的发射接收性能越好, 所述匹配电路包括 电容、 电感。
在现有技术中, 匹配电路的阻抗值是一定的, 但是天线馈点的阻抗随 着天线接收频点的变化而变化, 由于天线的频宽较宽, 所以天线不可能在 所有的频点的匹配程度都很高, 也就是说天线不可能在所有频点的接收性 能都较好, 导致在某些节目频点的接收信号较差, 影响了用户体验。 发明内容
有鉴于此, 本发明的主要目的在于提供一种天线自适应匹配的方法及 装置, 提高手机电视接收性能, 增强用户体验。 为达到上述目的, 本发明的技术方案是这样实现的:
本发明提供了一种天线自适应匹配的方法, 该方法包括:
接收节目频点信号, 根据当前节目频点的信号强度调节匹配电路的匹 配电路参数, 改变匹配电路阻抗, 将最高信号强度值对应的匹配电路参数 与节目频点相关联。
上述方案中, 所述根据当前节目频点的信号强度调节匹配电路的匹配 电路参数包括: 接收节目频点的信号强度值, 选取最高信号强度值对应的 匹配电路参数, 保存在寄存器中。
上述方案中, 所述改变匹配电路阻抗包括: 匹配电路接收匹配电路参 数, 根据改变自身有源电路的电压, 改变匹配电路中电容的容值。
上述方案中, 所述选取最高信号强度值对应的匹配电路参数包括: 将 接收的第一信号强度值同预存的信号强度值门限比较, 确定大于信号强度 值门限, 或匹配电路参数取值范围中的匹配电路参数均已标记, 将所述第 一信号强度值对应的匹配电路参数保存在寄存器中, 并与节目频点相关联, 匹配结束; 确定小于门限值、 且匹配电路参数取值范围内有匹配电路参数 没有标记, 将所述信号强度值对应的匹配电路参数保存在寄存器中, 并与 节目频点相关联, 选取匹配电路参数值范围中的其他未标记的匹配电路参 数, 发送给匹配电路, 接收第二信号强度值; 若第二信号强度值大于第一 信号强度值, 进一步与信号强度值门限比较, 确定大于信号强度值门限, 或匹配电路参数取值范围中的匹配电路参数均已标记, 将第二信号强度值 对应的匹配电路参数替代寄存器中的第一信号强度值对应的匹配电路参 数, 匹配结束; 若第二信号强度值小于门限值、 且确定匹配电路参数取值 范围内有匹配电路参数没有标记, 则用第二信号强度值对应的匹配电路参 数覆盖寄存器中保存的第一信号强度值对应的匹配电路参数, 继续选取匹 配电路参数取值范围之内的下一未标记的匹配电路参数; 若第二信号强度 值小于第一信号强度值, 继续选取匹配电路参数取值范围之内的下一未标 记的匹配电路参数。
上述方案中, 所述将最高信号强度值对应的匹配电路参数与节目频点 相关联之后, 该方法进一步包括: 再次选择观看此节目频点的节目, 根据 接收的包含节目频点的接收到信号的信息, 查询保存的匹配参数与节目频 点的对应关系, 获取与所述接收到信号的信息中节目频点对应的匹配电路 参数, 发送给匹配电路。
本发明还提供了一种天线自适应匹配的装置, 该装置包括: 电视芯片、 控制芯片、 寄存器、 匹配电路;
电视芯片, 用于将接收到信号的信息发送给控制芯片, 将接收信号的 信号强度值发送给控制芯片;
控制芯片, 用于接收电视芯片发送的接收到信号的信息, 接收电视芯 片发送的信号强度值, 根据信号强度值调节匹配电路的匹配电路参数, 将 最高信号强度值对应的匹配电路参数与节目频点相关联, 并保存在寄存器 中;
寄存器, 用于保存匹配电路参数及节目频点;
匹配电路, 用于接收控制芯片发送的匹配电路参数, 根据匹配电路参 数改变自身阻抗对天线进行匹配。
上述方案中, 所述控制芯片具体用于, 接收电视芯片发送的信号强度 值, 选取最高信号强度值对应的匹配电路参数, 保存在寄存器中。
上述方案中, 所述匹配电路具体用于, 接收控制芯片发送的匹配电路 参数, 根据匹配电路参数改变自身有源电路的电压, 改变匹配电路中电容 的容值, 从而改变匹配电路的阻抗对天线进行匹配。
上述方案中, 所述控制芯片具体用于, 将接收的第一信号强度值同预 存的信号强度值门限比较, 确定大于信号强度值门限, 或匹配电路参数取 值范围中的匹配电路参数均已标记, 将所述第一信号强度值对应的匹配电 路参数保存在寄存器中, 并与节目频点相关联; 确定小于信号强度值门限、 且匹配电路参数取值范围内有匹配电路参数没有标记, 将所述信号强度值 对应的匹配电路参数保存在寄存器中, 并与节目频点相关联, 选取匹配电 路参数值范围中的其他参数, 发送给匹配电路, 接收第二信号强度值; 若 第二信号强度值大于第一信号强度值, 进一步与信号强度值门限比较, 确 定大于信号强度值门限, 且匹配电路参数取值范围中的匹配电路参数均已 标记, 将第二信号强度值对应的匹配电路参数替代寄存器中的第一信号强 度值对应的匹配电路参数; 若第二信号强度值小于门限值、 且确定匹配电 路参数取值范围内有匹配电路参数没有标记, 则用第二信号强度值对应的 匹配电路参数覆盖寄存器中保存的第一信号强度值对应的匹配电路参数, 继续选取匹配电路参数取值范围之内的下一未标记的匹配电路参数; 若第 二信号强度值小于第一信号强度值, 继续选取匹配电路参数取值范围之内 的下一未标记的匹配电路参数。
上述方案中, 电视芯片, 再次选择此节目频点时, 用于将包含节目频 点的接收到信号的信息发送给控制芯片; 控制芯片进一步用于, 根据接收 的接收到信号的信号中的节目频点查询寄存器中保存的匹配电路参数与节 目频点的对应关系, 获取与所述接收的节目频点对应的匹配电路参数, 发 送给匹配电路。
采用本发明所述的自适应匹配的方法及装置, 通过调整匹配电路的参 数, 改变匹配电路阻抗, 在不同的节目频点时, 使手机电视的匹配性能达 到最佳, 提高了手机电视的接收性能, 增强了用户体验。 附图说明
图 1为本发明中实现天线自适应匹配的方法流程示意图;
图 2为本发明中根据信号强度值确定最佳匹配的方法流程示意图; 图 3为本发明中实现天线自适应匹配的装置组成示意图。 具体实施方式
本发明的基本思想是: 选择节目频点, 接收节目频点的电视信号, 根 据接收信号的信号强度调节匹配电路的匹配电路参数, 使电路达到最佳匹 配, 接收最佳信号强度。
下面通过具体实施例与附图来对本发明做进一步说明。
一种天线自适应匹配的方法, 如图 1所示, 具体步驟如下:
步驟 101、 选择节目频点, 接收节目频点的电视信号;
用户可通过手机电视芯片的操作界面选择自动搜索电视信号, 电视芯 片逐个搜索频宽内所有节目频点的信号。 用户通过手机电视芯片的操作界 面选择观看某一节目频点的节目, 若电视芯片没有接收天线发送的所述节 目频点的信号, 则通过操作界面显示没有信号, 若接收到天线发送的所述 节目频点的信号, 将显示节目画面, 同时将接收到信号的信息发送给控制 芯片, 所述接收到信号的信息包含节目频点, 这里, 所述控制芯片可以作 为功能模块集成在手机其他芯片中, 如集成到主芯片中, 也可以是在手机 中单独设置。
步驟 102、 通过调整匹配电路参数调整接收信号强度, 获取最佳匹配; 控制芯片接收所述接收到信号的信息 , 向电视芯片发送实时反馈接收 信号强度的指示, 电视芯片接收控制芯片发送的实时反馈接收信号强度的 指示, 向控制芯片实时反馈从天线接收的当前节目频点的信号强度值。
控制芯片接收电视芯片反馈的信号强度值, 选取最高信号强度值对应 的匹配电路参数, 作为最佳匹配, 具体过程如图 2所示, 具体步驟如下: 步驟 1021: 控制芯片接收第一信号强度值, 将第一信号强度值保存在 寄存器中, 并与节目频点相关联, 所述寄存器可是独立存在, 也可以是控 制芯片或者其他芯片的存储部分, 其中, 第一信号强度值即为电视芯片此 时反馈的信号强度值;
步驟 1022: 将第一信号强度值同本地预存的信号强度值门限比较, 所 述信号强度值门限可以根据需要自行取值。 若第一信号强度值大于信号强 度值门限, 说明第一信号强度值已经足够高, 可以清晰的收看节目, 或者 匹配电路参数取值范围内的匹配电路参数均已标记, 说明匹配电路参数取 值范围内的匹配电路参数均已被输出过, 只有当前的第一信号强度值最高, 执行步驟 1025; 若第一信号强度值小于信号强度值门限, 且匹配电路参数 取值范围内有匹配电路参数没有标记, 说明还有匹配电路参数没有被输入 给匹配电路, 第一信号强度值不一定为最高, 将第一信号强度值对应的匹 配电路参数、 即当前的匹配电路参数保存在寄存器中, 并与第一信号强度 值及节目频点相关联, 执行步驟 1023;
步驟 1023: 控制芯片选择没有标记的匹配电路参数取值范围中的其他 匹配电路参数, 输出给匹配电路, 匹配电路的阻抗改变, 这时, 电视芯片 接收的信号强度也会相应改变, 电视芯片将从天线接收的第二信号强度值 发送给控制芯片, 第二信号强度值为匹配电路阻抗改变后反馈给控制芯片 的信号强度值; 选择没有标记的匹配电路参数时, 可以从没有标记的匹配 电路参数取值范围中任意选择;
步驟 1024: 控制芯片比较第二信号强度值与第一信号强度值的大小, 若第二信号强度值大于第一信号强度值, 将第二信号强度值替代寄存器中 的第一信号强度值, 执行步驟 1022, 所不同之处在于, 所比较的是第二信 号强度值与信号强度值门限的大小;
若第二信号强度值大于信号强度值门限, 或匹配电路参数取值范围内 的匹配电路参数均已标记, 执行步驟 1025; 若第二信号强度值小于信号强 度值门限、 且匹配电路参数取值范围内有没有标记的匹配电路参数, 用第 二信号强度值对应的匹配电路参数覆盖寄存器中保存的第一信号强度值对 应的匹配电路参数, 并与第二信号强度值及节目频点相关联, 执行步驟
1023 , 继续选取匹配电路参数取值范围中的其他没有标记的匹配电路参数, 并发送给匹配电路, 所不同之处在于, 此时电视芯片接收的是第三信号强 度值, 并发送给控制芯片, 控制芯片用从电视芯片接收的第三信号强度值 与第二信号强度值比较;
若第二信号强度值大于第一信号强度值, 执行步驟 1023。
步驟 1025: 将当前发送给匹配电路的匹配电路参数, 第一信号强度值 大于信号强度值门限或匹配电路取值范围内的匹配电路参数均已标记时, 当前发送给匹配电路的匹配电路参数为控制芯片接收第一信号强度值时, 输出给匹配电路的匹配电路参数, 将其作为第一信号强度值对应的匹配电 路参数保存在寄存器中, 并与节目频点相关联, 第一信号强度值对应的匹 配电路参数为最佳匹配, 匹配结束。 所述匹配电路参数是指控制芯片输入 给匹配电路的参数, 所述匹配电路包括可变电容、 电感, 其中, 可变电容 为有源压控电容, 根据接收的参数不同, 这里的参数指匹配电路参数, 自 行改变内部电源电路的电压, 从而实现输出电容的改变, 参数与电容之间 的对应关系可通过可变电容的说明书获取。
所述匹配电路参数取值范围是通过粗调获取的一组匹配电路参数, 并 预先保存在控制芯片中。 所述粗调可以采用但不限于如下方法: 将天线与 匹配电路相连并接入网络分析仪, 网络分析仪向所述天线与匹配电路相连 的电路输入信号, 并接收所述天线与匹配电路相连的电路的输出信号, 显 示输入与输出之间的回波损耗, 调整匹配电路中的电容, 每一组电容对应 一个回波损耗, 获取小于一定回波损耗所对应的所有电容, 根据电容与参 数的对应关系, 获取每一组电容对应的参数, 即为匹配电路参数取值范围, 所述一定回波损耗可以根据需要自行取值, 例如 -5dB , 其中, 将匹配电路 的初始参数设为符合要求的回波损耗中、 最大回波损耗所对应的参数, 即 控制芯片的默认输出匹配电路参数, 控制芯片向匹配电路输出匹配电路参 数, 同时将匹配电路参数取值范围内已输出的匹配电路参数添加标记, 表 示该匹配电路参数已被使用过。 同样的, 第二信号强度值大于第一信号强 度值, 且第二信号强度值大于信号强度值门限或匹配电路参数取值范围内 的匹配电路参数均已标记, 则当前发送给匹配电路的匹配电路参数为控制 芯片接收电视芯片发送的第二信号强度值时, 输出给匹配电路的参数, 将 其作为第二信号强度值对应的匹配电路参数, 替代寄存器中的第一信号强 度值对应的匹配电路参数, 第二信号强度值对应的匹配电路参数为最佳匹 配, 匹配结束。 以此类推。
匹配结束后, 控制芯片删除自身保存的匹配电路参数取值范围中匹配 电路参数的标记。
步驟 103、 通过最佳匹配, 观看电视节目。
若用户通过电视芯片的操作界面再次选择观看此节目频点的节目 , 电 视芯片搜索信号, 将包含节目频点的接收到信号的信息发送给控制芯片 , 控制芯片根据节目频点查询寄存器中节目频点与匹配电路参数的对应关 系, 获取所述节目频点的最佳匹配, 将最佳匹配的匹配电路参数发送给匹 配电路, 使接收信号达到最好。
本发明还提供了一种天线自适应匹配的装置, 该装置包括: 匹配电路 303、 电视芯片 301、 控制芯片 302、 寄存器 304; 其中, 所述寄存器 304可 以是电视芯片 301、或控制芯片 302或手机其他芯片的一部分, 也可以独立 存在; 所述控制芯片可以作为功能模块集成在手机其他芯片中, 如集成到 主芯片中, 也可以是在手机中单独设置;
电视芯片 301 , 用户通过操作界面选择节目频点时, 用于接收天线发送 的节目频点的信号, 将包含频点的接收到信号的信息发送给控制芯片 302; 接收控制芯片 302发送的实时反馈信号强度的指示, 将接收信号的信号强 度值实时发送给控制芯片 302;
控制芯片 302, 用于接收电视芯片 301发送的接收到信号的信息, 向电 视芯片 301发送实时反馈信号强度的指示; 通过调整匹配电路参数调整信 号强度, 获取最佳匹配电路参数, 将最佳匹配电路参数与节目频点相关联, 保存在寄存器中;所述匹配电路参数是指控制芯片 302输入给匹配电路 303 的参数, 寄存器 304, 用于保存匹配电路参数及对应的节目频点;
寄存器 304, 用于保存匹配电路参数及节目频点;
匹配电路 303 , 包含有源压控电容、 电感, 用于根据接收的不同匹配电 路参数, 输出不同的阻抗值。 图 3中所示为匹配电路 303的一种实现形式。
匹配电路 303具体用于, 接收控制芯片 302发送的匹配电路参数, 根 据匹配电路参数改变自身有源电路的电压, 改变匹配电路中电容的容值, 从而改变匹配电路的阻抗。
控制芯片 302具体用于, 接收电视芯片 301发送的信号强度值, 选取 最高信号强度值对应的匹配电路参数, 保存在寄存器 304 中, 并与节目频 点相关联。
控制芯片 302具体用于, 接收第一信号强度值, 将第一信号强度值保 存在寄存器 304 中, 并与节目频点相关联, 将第一信号强度值同本地预存 的信号强度值门限比较, 所述信号强度值门限可以根据需要自行取值, 若 第一信号强度值大于信号强度值门限, 或者匹配电路参数取值范围内的匹 配电路参数均已标记, 则将当前输出的匹配电路参数, 即接收第一信号强 度值时, 输出给匹配电路 303 的匹配电路参数, 作为第一信号强度值对应 的匹配电路参数保存在寄存器 304 中, 并与节目频点相关联, 第一信号强 度值对应的匹配电路参数为最佳匹配, 匹配结束;
若第一信号强度值小于信号强度值门限, 且匹配电路参数取值范围内 有匹配电路参数没有标记, 将第一信号强度值对应的匹配电路参数保存在 寄存器 304 中, 并将第一信号强度值及节目频点相关联; 选择没有标记的 匹配电路参数取值范围中的其他匹配电路参数,输出给匹配电路 303 , 匹配 电路 303的阻抗改变, 接收电视芯片 301发送的第二信号强度值, 比较第 二信号强度值与第一信号强度值的大小, 若第二信号强度值大于第一信号 强度值, 将第二信号强度值替代寄存器 304 中的第一信号强度值, 并进一 步比较第二信号强度值与信号强度值门限的大小, 若第二信号强度值大于 信号强度值门限, 或匹配电路参数取值范围内的匹配电路参数均已标记, 则将第二信号强度值对应的匹配电路参数替代寄存器 304 中第一信号强度 值对应的匹配电路参数, 匹配结束; 若第二信号强度值小于信号强度值门 限, 且匹配电路参数取值范围内有没有标记的匹配电路参数, 则继续选取 匹配电路参数取值范围中的其他没有标记的匹配电路参数, 并发送给匹配 电路 303 , 用从电视芯片 301接收的信号强度值与第二信号强度值比较, 所 述比较方法与第一信号强度值与第二信号强度值的比较方法相同; 若第二 信号强度值大于第一信号强度值, 选取匹配电路参数取值范围中的其他没 有标记的匹配电路参数, 并发送给匹配电路 303 , 用从电视芯片 301接收的 信号强度值与第二信号强度值比较, 所述比较方法与第一信号强度值与第 二信号强度值的比较方法相同, 匹配结束后, 删除自身保存的匹配电路参 数取值范围中匹配电路参数的标记;
其中, 所述匹配电路参数取值范围是通过粗调获取的一组匹配电路参 数, 并预先保存在控制芯片 302中。 所述粗调可以采用但不限于如下方法: 将天线与匹配电路相连并接入网络分析仪, 网络分析仪向所述天线与匹配 电路相连的电路输入信号, 并接收所述天线与匹配电路相连的电路的输出 信号, 显示输入与输出之间的回波损耗, 调整匹配电路中的电容, 每一组 电容对应一个回波损耗, 获取小于一定回波损耗所对应的所有电容, 根据 电容与参数的对应关系, 获取每一组电容对应的参数, 即为匹配电路参数 取值范围, 所述一定回波损耗可以根据需要自行取值, 例如 -5dB, 其中, 将匹配电路的初始参数设为符合要求的回波损耗中、 最大回波损耗所对应 的参数, 即控制芯片 302的默认输出参数, 控制芯片 302向匹配电路输出 匹配电路参数, 同时将匹配电路参数取值范围内已输出的匹配电路参数添 力口才示 i己。
电视芯片 301 , 用户再次选择观看此节目频点的节目时, 用于将包含节 目频点的接收信号的信息发送给控制芯片 302;
控制芯片 302进一步用于, 根据接收的节目频点查询寄存器中保存的 匹配电路参数与节目频点的对应关系, 获取与所述接收的节目频点对应的 匹配电路参数, 发送给匹配电路 303。
上述方案中, 通过调整匹配电路的参数, 改变匹配电路阻抗, 在不同 的节目频点时, 使手机电视的匹配性能达到最佳, 提高了手机电视的接收 性能, 增强了用户体验。
以上所述, 仅为本发明的较佳实施例而已, 并非用于限定本发明的保 护范围, 凡在本发明的精神和原则之内所作的任何修改、 等同替换和改进 等, 均应包含在本发明的保护范围之内。

Claims

权利要求书
1、 一种天线自适应匹配的方法, 其特征在于, 该方法包括: 接收节目频点信号, 根据当前节目频点的信号强度调节匹配电路的匹 配电路参数, 改变匹配电路阻抗, 将最高信号强度值对应的匹配电路参数 与节目频点相关联。
2、 根据权利要求 1所述的方法, 其特征在于, 所述根据当前节目频点 的信号强度调节匹配电路的匹配电路参数包括:
接收节目频点的信号强度值, 选取最高信号强度值对应的匹配电路参 数, 保存在寄存器中。
3、 根据权利要求 1所述的方法, 其特征在于, 所述改变匹配电路阻抗 包括:
匹配电路接收匹配电路参数, 根据改变自身有源电路的电压, 改变匹 配电路中电容的容值。
4、 根据权利要求 2所述的方法, 其特征在于, 所述选取最高信号强度 值对应的匹配电路参数包括:
将接收的第一信号强度值同预存的信号强度值门限比较, 确定大于信 号强度值门限, 或匹配电路参数取值范围中的匹配电路参数均已标记, 将 所述第一信号强度值对应的匹配电路参数保存在寄存器中, 并与节目频点 相关联, 匹配结束; 确定小于门限值、 且匹配电路参数取值范围内有匹配 电路参数没有标记, 将所述信号强度值对应的匹配电路参数保存在寄存器 中, 并与节目频点相关联, 选取匹配电路参数值范围中的其他未标记的匹 配电路参数, 发送给匹配电路, 接收第二信号强度值;
若第二信号强度值大于第一信号强度值, 进一步与信号强度值门限比 较, 确定大于信号强度值门限, 或匹配电路参数取值范围中的匹配电路参 数均已标记, 将第二信号强度值对应的匹配电路参数替代寄存器中的第一 信号强度值对应的匹配电路参数, 匹配结束; 若第二信号强度值小于门限 值、 且确定匹配电路参数取值范围内有匹配电路参数没有标记, 则用第二 信号强度值对应的匹配电路参数覆盖寄存器中保存的第一信号强度值对应 的匹配电路参数, 继续选取匹配电路参数取值范围之内的下一未标记的匹 配电路参数; 若第二信号强度值小于第一信号强度值, 继续选取匹配电路 参数取值范围之内的下一未标记的匹配电路参数。
5、 根据权利要求 1至 4任一项所述的方法, 其特征在于, 所述将最高 信号强度值对应的匹配电路参数与节目频点相关联之后, 该方法进一步包 括:
再次选择观看此节目频点的节目, 根据接收的包含节目频点的接收到 信号的信息, 查询保存的匹配参数与节目频点的对应关系, 获取与所述接 收到信号的信息中节目频点对应的匹配电路参数, 发送给匹配电路。
6、一种天线自适应匹配的装置, 其特征在于, 该装置包括: 电视芯片、 控制芯片、 寄存器、 匹配电路; 其中,
电视芯片, 用于将接收到信号的信息发送给控制芯片, 将接收信号的 信号强度值发送给控制芯片;
控制芯片, 用于接收电视芯片发送的接收到信号的信息, 接收电视芯 片发送的信号强度值, 根据信号强度值调节匹配电路的匹配电路参数, 将 最高信号强度值对应的匹配电路参数与节目频点相关联, 并保存在寄存器 中;
寄存器, 用于保存匹配电路参数及节目频点;
匹配电路, 用于接收控制芯片发送的匹配电路参数, 根据匹配电路参 数改变自身阻抗对天线进行匹配。
7、 根据权利要求 6所述的装置, 其特征在于,
所述控制芯片具体用于, 接收电视芯片发送的信号强度值, 选取最高 信号强度值对应的匹配电路参数, 保存在寄存器中。
8、 根据权利要求 6所述的装置, 其特征在于,
所述匹配电路具体用于, 接收控制芯片发送的匹配电路参数, 根据匹 配电路参数改变自身有源电路的电压, 改变匹配电路中电容的容值, 从而 改变匹配电路的阻抗对天线进行匹配。
9、 根据权利要求 7所述的装置, 其特征在于,
所述控制芯片具体用于, 将接收的第一信号强度值同预存的信号强度 值门限比较, 确定大于信号强度值门限, 或匹配电路参数取值范围中的匹 配电路参数均已标记, 将所述第一信号强度值对应的匹配电路参数保存在 寄存器中, 并与节目频点相关联; 确定小于信号强度值门限、 且匹配电路 参数取值范围内有匹配电路参数没有标记, 将所述信号强度值对应的匹配 电路参数保存在寄存器中, 并与节目频点相关联, 选取匹配电路参数值范 围中的其他参数, 发送给匹配电路, 接收第二信号强度值;
若第二信号强度值大于第一信号强度值, 进一步与信号强度值门限比 较, 确定大于信号强度值门限、 且匹配电路参数取值范围中的匹配电路参 数均已标记, 将第二信号强度值对应的匹配电路参数替代寄存器中的第一 信号强度值对应的匹配电路参数; 若第二信号强度值小于门限值、 且确定 匹配电路参数取值范围内有匹配电路参数没有标记, 则用第二信号强度值 对应的匹配电路参数覆盖寄存器中保存的第一信号强度值对应的匹配电路 参数, 继续选取匹配电路参数取值范围之内的下一未标记的匹配电路参数; 若第二信号强度值小于第一信号强度值, 继续选取匹配电路参数取值范围 之内的下一未标记的匹配电路参数。
10、 根据权利要求 6至 9任一项所述的装置, 其特征在于,
电视芯片, 再次选择此节目频点时, 用于将包含节目频点的接收到信 号的信息发送给控制芯片; 控制芯片进一步用于, 根据接收的接收到信号的信号中的节目频点查 询寄存器中保存的匹配电路参数与节目频点的对应关系, 获取与所述接收 的节目频点对应的匹配电路参数, 发送给匹配电路。
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