WO2012126260A1 - 提高终端接收灵敏度的方法及终端 - Google Patents

提高终端接收灵敏度的方法及终端 Download PDF

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Publication number
WO2012126260A1
WO2012126260A1 PCT/CN2011/083480 CN2011083480W WO2012126260A1 WO 2012126260 A1 WO2012126260 A1 WO 2012126260A1 CN 2011083480 W CN2011083480 W CN 2011083480W WO 2012126260 A1 WO2012126260 A1 WO 2012126260A1
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Prior art keywords
module
frequency band
mode
order
control module
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PCT/CN2011/083480
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English (en)
French (fr)
Inventor
杜艳丽
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中兴通讯股份有限公司
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Publication of WO2012126260A1 publication Critical patent/WO2012126260A1/zh

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Classifications

    • 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
    • H04B1/50Circuits using different frequencies for the two directions of communication
    • H04B1/52Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H04B1/525Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
    • 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
    • H04B1/3805Transceivers, 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 with built-in auxiliary receivers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02Terminal devices
    • H04W88/06Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Definitions

  • the present invention relates to communication technologies, and in particular, to a method and a terminal for improving terminal receiving sensitivity.
  • TD-SCDMA time division synchronous CDMA
  • GSM Global System for Mobile communication
  • the mode bands do not overlap from the working frequency band, and there should be no interference, but actually due to the nonlinearity of the receiver and the out-of-band radiation of the transmitter transmitting signal, When the modes work at the same time, there must be mutual interference. In general, the closer the band spacing is, the greater the impact of the interference.
  • the TD-SCDMA referred to as TD F-band (1880MHz - 1920MHz) and the DCS 1800 downlink operating band (1805MHz - 1880MHz) are adjacent, the 885 channel of the DCS1800 downlink band and the center frequency of the TD F band 9404 channel. With only 0.9MHz spacing, it can be inferred that the interference between the TD F band and the GSM DCS band will be larger than other bands.
  • the general measure is to use dual antennas and increase the isolation of the two antennas as much as possible, or add a dielectric filter or a sound table filter at the transmitting end. Due to the limitation of the size of the mobile phone, the isolation between the antennas cannot be performed well. At the same time, adding a filter will cause unnecessary attenuation of the useful signals in the band and affect the receiving sensitivity of the terminal.
  • the invention provides a method and a terminal for improving the receiving sensitivity of a terminal, so as to solve the problem that the receiving sensitivity of the terminal is not high.
  • the present invention provides a method for improving the receiving sensitivity of a terminal, where the terminal includes a first module supporting the first mode and a second module supporting the second mode, and the first frequency band and the second mode in the first mode are The second frequency bands are mutually interfering frequency bands, and the above methods include:
  • the first module and the second module When the first module and the second module are simultaneously operated in two modes of interference bands, and when the two modes are respectively in a transmitting state and a receiving state, the first module or the second module in the receiving state may be The filter of the order is set to a high-order state.
  • the step of setting the filter of the first module or the second module in the receiving state to the high-order state in the receiving state includes:
  • the first control module corresponding to the first module sends information about the working frequency band and the working state of the first module to the second control module corresponding to the second module;
  • the second control module determines that the second module works in the second frequency band and is in a transmitting state, and the first module works in the first frequency band and is in the receiving state, notifying the first control module to adjust the first module
  • the number of filters is set to a higher order state
  • the second control module determines that the second module operates in the second frequency band and is in the receiving state, and when the first module works in the first frequency band and is in the transmitting state, the filter of the second module is adjustable. Set to a high-order state.
  • the first mode is a Global System for Mobile Communications (GSM) mode
  • the first frequency band is a digital cellular system (DCS) 1800 frequency band
  • the first module is a GSM module
  • the first control module is a GSM control module
  • the medium adjustable order filter includes a low order filter (LPF) of adjustable order and/or a finite impulse response digital filter (FIR) of adjustable order;
  • LPF low order filter
  • FIR finite impulse response digital filter
  • the second mode is a time division synchronous code division multiple access (TD) mode
  • the second frequency band is an F frequency band
  • the second module is a TD module
  • the second control module is a TD control module
  • the chord digital filter (RRC) is a time division synchronous code division multiple access (TD) mode
  • TD time division synchronous code division multiple access
  • the first mode is the TD mode
  • the first frequency band is the F frequency band
  • the first module is a TD module
  • the first control module is a TD control module
  • the adjustable order filter in the first module includes an adjustable step. Number of LPF and/or RRC with adjustable order;
  • the second mode is the GSM mode, and the second frequency band is the DCS1800 frequency band, and the second The module is a GSM module, and the second control module is a GSM control module, and the filter of the second module has an adjustable order LPF and/or an adjustable order FIR.
  • the filter of the adjustable first order in the first module is located in the first frequency band receiving channel of the first module
  • the filter of the adjustable order in the second module is located in the second frequency band receiving channel of the second module.
  • the present invention also provides a terminal, including a first module supporting a first mode and a first control module corresponding to the first module, and a second module supporting the second mode and a second control module corresponding to the second module
  • the first frequency band in the first mode and the second frequency band in the second mode are mutually interference frequency bands, where:
  • the first frequency band receiving channel of the first module and the second frequency band receiving channel of the second module respectively include a filter with an adjustable order
  • the first control module and the second control module are configured to: interact with the working frequency band and the status information of the first module and the second module, and determine that the first module and the second module work simultaneously in the interference mode of the two modes, and When the modes are in the transmitting state and the receiving state, respectively, the filter of the first module or the second module in the receiving state is set to a high-order state.
  • the first control module is configured to send information including the working frequency band and the working state of the first module to the second control module;
  • the second control module is configured to: if the second module is determined to be in the second frequency band and is in a transmitting state, and the first module is in the first frequency band and is in the receiving state, notify the first control module to be the first The filter of the adjustable order in the module is set to a high-order state; if it is determined that the second module operates in the second frequency band and is in the receiving state, and the first module operates in the first frequency band and is in the transmitting state, then the second The filter with adjustable order in the module is set to a high-order state.
  • the second control module is further configured to notify the first control module to set the filter of the adjustable order in the first module to a low-order state when determining that the second module operates in a non-second frequency band.
  • the first mode is a Global System for Mobile Communications (GSM) mode
  • the first frequency band is a digital cellular system (DCS) 1800 frequency band
  • the first module is a GSM module
  • the first control mode The block is a GSM control module
  • the adjustable order filter in the first module includes a low-pass filter (LPF) of adjustable order and/or a finite impulse response digital filter (FIR) of adjustable order;
  • LPF low-pass filter
  • FIR finite impulse response digital filter
  • the second mode is a time division synchronous code division multiple access (TD) mode
  • the second frequency band is an F frequency band
  • the second module is a TD module
  • the second control module is a TD control module
  • the chord digital filter (RRC) is a time division synchronous code division multiple access (TD) mode
  • TD time division synchronous code division multiple access
  • the first mode is the TD mode
  • the first frequency band is the F frequency band
  • the first module is a TD module
  • the first control module is a TD control module
  • the adjustable order filter in the first module includes an adjustable step. Number of LPF and/or RRC with adjustable order;
  • the second mode is a GSM mode
  • the second frequency band is a DCS1800 frequency band
  • the second module is a GSM module
  • the second control module is a GSM control module
  • the adjustable order filter of the second module includes an adjustable step. The number of LPFs and/or the FIR of the adjustable order.
  • the technical solution of the present invention can improve the TD F frequency band and GSM when the terminal GSM module works in the DCS frequency band and the TD module works in the F frequency band, and the GAM DCS frequency band and the TD F frequency band receiving sensitivity are greatly affected. Receive sensitivity of the DCS band.
  • FIG. 1 is a frequency band distribution diagram of a conventional GSM DCS frequency band and a TD-SCDMA F frequency band;
  • FIG. 2 is a schematic structural diagram of an embodiment of a GSM receiving channel according to the present invention.
  • FIG. 3 is a schematic structural diagram of an embodiment of a TD-SCDMA receiving channel according to the present invention.
  • FIG. 4 is a schematic diagram of information interaction of an embodiment of a filter in which an adjustable order is set in a GSM module and a TD module according to the present invention
  • FIG. 5 is a flow chart of an embodiment of a method for improving terminal receiving sensitivity according to the present invention.
  • FIG. 6 is a schematic structural diagram of an embodiment of a terminal of the present invention. Preferred embodiment of the invention
  • the present invention provides a method for improving the receiving sensitivity of a terminal, where the terminal includes a first module supporting the first mode and a second module supporting the second mode, and the first frequency band and the second mode in the first mode are
  • the second frequency bands are mutually interfering frequency bands, and the above methods include:
  • the first module and the second module When the first module and the second module are simultaneously operated in two modes of interference bands, and when the two modes are respectively in a transmitting state and a receiving state, the first module or the second module in the receiving state may be The filter of the order is set to a high-order state.
  • the above method can be implemented by the following scheme:
  • the first control module corresponding to the first module sends information about the working frequency band and the working state of the first module to the second control module corresponding to the second module;
  • the second control module determines that the second module works in the second frequency band and is in a transmitting state, and the first module works in the first frequency band and is in the receiving state, notifying the first control module to adjust the first module
  • the number of filters is set to a higher order state
  • the second control module determines that the second module operates in the second frequency band and is in the receiving state, and when the first module works in the first frequency band and is in the transmitting state, the filter of the second module is adjustable. Set to a higher order state;
  • the first control module is notified to set the filter of the adjustable order in the first module to a low-order state.
  • the first mode is a Global System for Mobile Communications (GSM) mode
  • the first frequency band is a digital cellular system (DCS) 1800 frequency band
  • the first module is a GSM module
  • the first control module is a GSM control module
  • the filter of the adjustable order in a module includes a low-pass filter (LPF) of adjustable order and/or a finite impulse response digital filter ( FIR) of adjustable order
  • the second mode is a time-division synchronization code
  • the second frequency band is the F frequency band
  • the second module is a TD module
  • the second control module is a TD control module
  • the second module filter (RRC) the second module filter
  • the first mode is a TD mode
  • the first frequency band is an F frequency band
  • the first module is a TD module
  • the first control module is a TD control module
  • the filter of the adjustable first order in the first module includes Adjustable order LPF and / or adjustable order RRC
  • the second mode is GSM In the mode, the second frequency band is the DCS1800 frequency band, the second module is a GSM module, the second control module is a GSM control module, and the adjustable order filter in the second module includes an LPF of an adjustable order and/or Adjustable order of FIR.
  • the filter of the first module is located in the first frequency band receiving channel of the first module, and the filter of the second module is located in the second frequency band of the second module. In the channel.
  • the technical solution of the present invention can improve the TD-SCDMA F frequency band when the terminal GSM module operates in the DCS frequency band and the TD module operates in the F frequency band, and the GAM DCS frequency band and the TD F frequency band receiving sensitivity are greatly affected. And the receiving sensitivity of the GSM DCS band.
  • FIG. 2 is a schematic structural diagram of an embodiment of a GSM receiving channel of the present invention, wherein a low noise amplifier, a mixer, a low pass filter (LPF), an analog variable gain amplifier (VGA), and an AD converter (ADC) ), Finite Impulse Response (FIR) and digital VGA to complete GSM 900 band reception; low noise amplifier, mixer, adjustable low pass filter (LPF-A), analog VGA, The ADC, tunable FIR (FI-A) and digital VGA complete the GSM DCS band reception.
  • LPF low pass filter
  • VGA analog variable gain amplifier
  • ADC AD converter
  • the difference between the GSM receiving channel in this embodiment and the existing GSM receiving channel is that the present invention uses LPF-A and FIR-A.
  • FIG. 3 is a schematic structural diagram of an embodiment of a TD-SCDMA receiving channel of the present invention, wherein a low noise amplifier, a mixer, a low pass filter LPF, an analog VGA, an ADC, a rms raised cosine digital filter (RRC) Filter, and digital VGA complete TD A band reception; low noise amplifier, mixer, analog low pass filter (LPF-A), analog VGA, ADC, tunable RRC (RRC-A) and digital VGA complete F Band reception function.
  • LPF-A analog low pass filter
  • RRC-A tunable RRC
  • the difference between the GSM receiving channel in this embodiment and the existing GSM receiving channel is that the present invention uses LPF-A and RRC-A.
  • the order of the filter LPF-A in the GSM receiving channel can be set in the low-order mode, thereby avoiding the reception signal passing through the multi-stage filter and the passband Unwanted attenuation of the signal; when the TD is operating in the F-band transmission state, the same
  • the LPF-A in the GSM receiving channel is set in the high-order mode to enhance the attenuation of the out-of-channel signal, improve the signal-to-noise ratio (SNR) of the input signal of the AD converter, thereby improving the receiving sensitivity.
  • SNR signal-to-noise ratio
  • the order of the FIR-A digital filter in the GSM receiving channel is set in the low-order mode to reduce the calculation amount and processing time of the DSP (Digital Signal Processing);
  • the FIR-A in the GSM receiving channel is set in the high-order mode to enhance the attenuation of the out-of-channel signal leaking into the ADC and improve the receiving sensitivity.
  • the order of the filter LPF-A in the TD receiving channel is set in the low-order mode to avoid unnecessary attenuation of the signal in the passband after the received signal passes through the multi-order filter;
  • the LPF-A in the TD receiving channel is set in the high-order mode to enhance the attenuation of the out-of-channel signal and improve the SNR of the input signal of the AD converter, thereby improving Receive sensitivity.
  • the order of the FIR-A digital filter in the TD receiving channel is set in the low-order mode to reduce the calculation amount and processing time of the DSP; when the TD operates in the F-band receiving state; when the TD operates in the F-band receiving state.
  • the FIR-A in the TD receiving channel is set in the high-order mode to enhance the attenuation of the out-of-channel signal leaking into the ADC and improve the receiving sensitivity.
  • FIG. 4 it is a schematic diagram of information interaction of the embodiment of the GSM module and the TD module with adjustable order.
  • the GSM control module reports the working frequency band of the GSM module to the TD-SCDMA control module. And the working state, the TD control module compares the working frequency band and working state of the received GSM module with the working frequency band and working state of the detected TD module.
  • the TD module works in F
  • the TD control module sends a command to set a filter to the GSM control module, the above process is completed inside the digital baseband (DBB), and the GSM control module sets the tunable filter in the GSM module according to the above command.
  • DBB digital baseband
  • the TD control module sets the order of the tunable filter in the TD module; specifically, the GSM in the DBB Control module and TD control module
  • the block sets the order of the filters inside the GSM module and the TD module through the Serial Peripheral Interface (SPI) interface.
  • SPI Serial Peripheral Interface
  • the GSM receiving channel in FIG. 2 is located in the GSM module in FIG. 4, and the TD receiving channel in FIG. 3 is located in the TD module in FIG.
  • FIG. 5 it is a flowchart of an embodiment of the method for improving terminal receiving sensitivity of the present invention, the method comprising:
  • Step 501 When the GSM module is working, the GSM control module reports the current working frequency band, working channel, and working status of the GSM module to the TD module.
  • Step 502 When the TD module is working, the TD control module detects the working frequency band, the working channel, and the working state of the reported GSM module from time to time, and compares it with the current working frequency band, the working channel, and the working state of the TD module;
  • Step 503 When the TD module works in the F frequency band and the working state is the transmitting state, and the GSM module works in the DCS frequency band, and is in the receiving state, sends the setting information to the GSM control module.
  • Step 504 After receiving the setting information, the GSM control module receives the setting information. , setting the order of the adjustable low-pass filter LPF-A in the GSM module, and the order of the adjustable digital filter FIR-A;
  • the adjustable low-pass filter LPF-A and the digital filter FIR-A both operate in a high-order state, the suppression of out-of-band spurious signals is enhanced, the signal-to-noise ratio at the input of the ADC is improved, and the sensitivity of the final receiving end is improved. Improved;
  • Step 505 When the TD module works in the F frequency band, the working state is the receiving state, the GSM module works in the DCS frequency band, and is in the transmitting state, the TD control module sets the adjustable analog filter LPF-A and the adjustable number in the TD module. The order of the filter FIR-A.
  • both LPF-A and FIR-A operate in a high-order state, and the suppression of out-of-band spurious signals is enhanced, the signal-to-noise ratio at the input of the ADC is improved, and the sensitivity of the receiving end is improved.
  • steps 503 and 505 are steps performed in parallel, that is, step 503 and steps.
  • FIG. 6 it is a schematic structural diagram of a terminal embodiment of the present invention.
  • the terminal includes a first module 61 supporting a first mode and a corresponding first control module 62, and a second module 63 supporting the second mode and corresponding a second control module 64, and the first frequency band of the first mode and the second frequency band of the second mode are interference frequency bands, and the first frequency band receiving channel of the first module and the second frequency band of the second module
  • the receiving channel includes a filter with an adjustable order; the first control module and the second control module are configured to: interact with the working frequency band and status information of the first module and the second module, and determine the first module and the second
  • the module works in the interference band of the two modes at the same time, and when the two modes are respectively in the transmitting state and the receiving state, the filter of the first module or the second module in the receiving state is set to a higher order. status.
  • the first control module is configured to send information including the working frequency band and the working state of the first module to the second control module; the second control module is configured to: determine that the second module works in the first The second frequency band is in a transmitting state, and when the first module works in the first frequency band and is in the receiving state, the first control module is notified to set the filter of the adjustable order in the first module to a high-order state; The second module works in the second frequency band and is in the receiving state. When the first module operates in the first frequency band and is in the transmitting state, the filter of the adjustable order in the second module is set to the high-order state.
  • the second control module is further configured to notify the first control module to set the filter of the adjustable order in the first module to a low-order state when determining that the second module operates in a non-second frequency band.
  • the first mode is a Global System for Mobile Communications (GSM) mode
  • the first frequency band is a digital cellular system (DCS) 1800 frequency band
  • the first module is a GSM module
  • the first control module is a GSM control module
  • the filter of the adjustable order in a module includes a low-pass filter (LPF) of adjustable order and/or a finite impulse response digital filter ( FIR) of adjustable order
  • the second mode is a time-division synchronization code
  • the second frequency band is the F frequency band
  • the second module is a TD module
  • the second control module is a TD control module
  • the foregoing One mode is the TD mode
  • the first frequency band is the F frequency band
  • the first module is a TD module
  • the first control module is a TD control module
  • the filter of the adjustable first order in the first module includes an adjustable order LPF and/or RRC with adjustable order
  • the above GSM control module and TD control module are located in the DBB.
  • the foregoing terminal can improve the sensitivity of the receiving, and the specific implementation method is the same as the method for improving the sensitivity of the terminal, and details are not described herein again.
  • the invention makes the GSM module of the terminal work in the DCS frequency band, and when the TD module works in the F frequency band, when the receiving sensitivity of the GAM DCS frequency band and the TD F frequency band is greatly affected, the TD F frequency band is improved. Receive sensitivity of the GSM DCS band.

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

Abstract

本发明提供了一种提高终端接收灵敏度的方法,上述终端包括支持第一模式的第一模块和支持第二模式的第二模块,且第一模式中的第一频段和第二模式中的第二频段互为干扰频段,该方法包括:当上述第一模块和上述第二模块同时工作在两个模式的干扰频段,且在两个模式分别处于发射状态和接收状态时,将处于接收状态的上述第一模块或上述第二模块中可调阶数的滤波器设置为高阶状态。本发明还提供了一种终端;采用本发明的技术方案,能够在终端GSM模块工作在DCS频段,同时TD模块工作在F频段时,GAMDCS频段和TDF频段接收灵敏度受较大影响的情况下,改善TDF频段和GSMDCS频段的接收灵敏度。

Description

提高终端接收灵敏度的方法及终端
技术领域
本发明涉及通信技术,尤其涉及一种提高终端接收灵敏度的方法及终端。
背景技术
随着移动通讯技术的高速发展, 时分同步码分多址 (Time division synchronous CDMA, TD-SCDMA )技术日趋成熟, 其上网、 可视电话、 手机 电视等高速数据业务吸引了很多用户。 同时, 全球移动通信系统 (Global System for Mobile communication, GSM ) 由于经过多年的建设发展, 凭借其 全面覆盖的网络,较高的通话质量等优点也拥有大量用户。因此,人们对 GSM 和 TD-SCDMA双模双待终端的需求也越来越强烈。
对于 GSM/TD-SCDMA双模双待终端,单从工作频带上看似乎各模式频 带并没有重叠, 应该不存在干扰, 但实际由于接收机的非线性和发射机发射 信号的带外辐射, 两种模式同时工作时, 必然存在着相互干扰。 一般来说, 频带间隔越近干扰的影响就越大。 由图 1可以看出, TD-SCDMA (简称 TD ) F 频 段 (1880MHz— 1920MHz) 和 DCS 1800 下 行 工 作 频 段 (1805MHz— 1880MHz)相邻 , DCS1800下行频段的 885信道与 TD F频段 9404 信道的中心频率只有 0.9MHz的间隔, 故可推断 TD F频段与 GSM DCS频段 之间的干扰较其它频段会更大。
对于双模终端之间的互扰问题, 一般措施是釆用双天线, 并尽可能的增 大两天线的隔离度, 或者在发送端添加介质滤波器或声表滤波器。 由于手机 尺寸的限制, 天线之间的隔离度不可能做得很好, 同时, 添加滤波器会对带 内有用信号造成不必要的衰减, 影响终端的接收灵敏度。
发明内容
本发明提供了一种提高终端接收灵敏度的方法及终端, 以解决终端的接 收灵敏度不高的问题。 本发明提供了一种提高终端接收灵敏度的方法, 上述终端包括支持第一 模式的第一模块和支持第二模式的第二模块, 且上述第一模式中的第一频段 和上述第二模式中的第二频段互为干扰频段, 上述方法包括:
当上述第一模块和上述第二模块同时工作在两个模式的干扰频段, 且在 两个模式分别处于发射状态和接收状态时, 将处于接收状态的上述第一模块 或上述第二模块中可调阶数的滤波器设置为高阶状态。
将处于接收状态的上述第一模块或上述第二模块中可调阶数的滤波器设 置为高阶状态的步骤包括:
上述第一模块对应的第一控制模块将包括上述第一模块的工作频段和工 作状态的信息发送给与上述第二模块对应的第二控制模块;
上述第二控制模块如确定上述第二模块工作在第二频段且处于发射状 态, 第一模块工作在第一频段且处于接收状态时, 则通知第一控制模块将上 述第一模块中可调阶数的滤波器设置为高阶状态; 以及
上述第二控制模块如确定上述第二模块工作在第二频段且处于接收状 态, 上述第一模块工作在第一频段且处于发射状态时, 则将上述第二模块中 可调阶数的滤波器设置为高阶状态。
上述第一模式为全球移动通讯系统(GSM )模式, 上述第一频段为数字 蜂窝系统(DCS ) 1800频段, 上述第一模块为 GSM模块, 上述第一控制模 块为 GSM控制模块,上述第一模块中可调阶数的滤波器包括可调阶数的低通 滤波器(LPF )和 /或可调阶数的有限冲激响应数字滤波器(FIR ) ;
上述第二模式为时分同步码分多址接入(TD )模式, 上述第二频段为 F 频段, 上述第二模块为 TD模块, 上述第二控制模块为 TD控制模块, 上述第 弦数字滤波器(RRC ) 。
上述第一模式为 TD模式, 上述第一频段为 F频段, 上述第一模块为 TD 模块, 上述第一控制模块为 TD控制模块,上述第一模块中可调阶数的滤波器 包括可调阶数的 LPF和 /或可调阶数的 RRC;
上述第二模式为 GSM模式, 上述第二频段为 DCS1800频段, 上述第二 模块为 GSM模块, 上述第二控制模块为 GSM控制模块, 上述第二模块中可 调阶数的滤波器包括可调阶数的 LPF和 /或可调阶数的 FIR。
上述第一模块中可调阶数的滤波器位于上述第一模块的第一频段接收通 道中;
上述第二模块中可调阶数的滤波器位于上述第二模块的第二频段接收通 道中。
本发明还提供了一种终端, 包括支持第一模式的第一模块和与第一模块 对应的第一控制模块, 以及支持第二模式的第二模块和与第二模块对应的第 二控制模块, 上述第一模式中的第一频段和上述第二模式中的第二频段互为 干扰频段, 其中:
上述第一模块的第一频段接收通道和上述第二模块的第二频段接收通道 中均包括可调阶数的滤波器;
上述第一控制模块和第二控制模块设置成: 交互第一模块和第二模块的 工作频段和状态信息, 判断上述第一模块和上述第二模块同时工作在两个模 式的干扰频段, 且两个模式分别处于发射状态和接收状态时, 将处于接收状 态的上述第一模块或上述第二模块中可调阶数的滤波器设置为高阶状态。
上述第一控制模块是设置成将包括上述第一模块的工作频段和工作状态 的信息发送给上述第二控制模块;
上述第二控制模块是设置成: 如确定上述第二模块工作在第二频段且处 于发射状态, 第一模块工作在第一频段且处于接收状态时, 则通知上述第一 控制模块将上述第一模块中可调阶数的滤波器设置为高阶状态; 如确定上述 第二模块工作在第二频段且处于接收状态, 第一模块工作在第一频段且处于 发射状态时, 则将上述第二模块中可调阶数的滤波器设置为高阶状态。
上述第二控制模块还设置成当确定上述第二模块工作在非第二频段时, 则通知上述第一控制模块将上述第一模块中可调阶数的滤波器设置为低阶状 态。
上述第一模式为全球移动通讯系统(GSM )模式, 上述第一频段为数字 蜂窝系统(DCS ) 1800频段, 上述第一模块为 GSM模块, 上述第一控制模 块为 GSM控制模块,上述第一模块中可调阶数的滤波器包括可调阶数的低通 滤波器(LPF )和 /或可调阶数的有限冲激响应数字滤波器(FIR ) ;
上述第二模式为时分同步码分多址接入(TD )模式, 上述第二频段为 F 频段, 上述第二模块为 TD模块, 上述第二控制模块为 TD控制模块, 上述第 弦数字滤波器(RRC ) 。
上述第一模式为 TD模式, 上述第一频段为 F频段, 上述第一模块为 TD 模块, 上述第一控制模块为 TD控制模块,上述第一模块中可调阶数的滤波器 包括可调阶数的 LPF和 /或可调阶数的 RRC;
上述第二模式为 GSM模式, 上述第二频段为 DCS1800频段, 上述第二 模块为 GSM模块, 上述第二控制模块为 GSM控制模块, 上述第二模块中可 调阶数的滤波器包括可调阶数的 LPF和 /或可调阶数的 FIR。
釆用本发明的技术方案, 能够在终端 GSM模块工作在 DCS频段, 同时 TD模块工作在 F频段时, GAM DCS频段和 TD F频段接收灵敏度受较大影 响的情况下, 改善 TD F频段和 GSM DCS频段的接收灵敏度。 附图概述
图 1 是现有 GSM DCS频段和 TD-SCDMA F频段的频带分布图; 图 2 是本发明 GSM接收通道实施例的结构示意图;
图 3 是本发明 TD-SCDMA接收通道实施例的结构示意图;
图 4 是本发明设置 GSM模块和 TD模块中可调阶数的滤波器实施例的 信息交互示意图;
图 5是本发明提高终端接收灵敏度方法实施例的流程图;
图 6是本发明终端实施例的结构示意图。 本发明的较佳实施方式
下面结合附图对技术方案作进一步地详细描述: 本发明提供了一种提高终端接收灵敏度的方法, 上述终端包括支持第一 模式的第一模块和支持第二模式的第二模块, 且上述第一模式中的第一频段 和上述第二模式中的第二频段互为干扰频段, 上述方法包括:
当上述第一模块和上述第二模块同时工作在两个模式的干扰频段, 且在 两个模式分别处于发射状态和接收状态时, 将处于接收状态的上述第一模块 或上述第二模块中可调阶数的滤波器设置为高阶状态。
具体地, 上述方法可釆用以下方案实现:
上述第一模块对应的第一控制模块将包括上述第一模块的工作频段和工 作状态的信息发送给与上述第二模块对应的第二控制模块;
上述第二控制模块如确定上述第二模块工作在第二频段且处于发射状 态, 第一模块工作在第一频段且处于接收状态时, 则通知第一控制模块将上 述第一模块中可调阶数的滤波器设置为高阶状态; 以及
上述第二控制模块如确定上述第二模块工作在第二频段且处于接收状 态, 上述第一模块工作在第一频段且处于发射状态时, 则将上述第二模块中 可调阶数的滤波器设置为高阶状态;
上述第二控制模块如确定上述第二模块工作在非第二频段, 则通知第一 控制模块将第一模块中可调阶数的滤波器设置为低阶状态。
其中, 上述第一模式为全球移动通讯系统(GSM )模式, 上述第一频段 为数字蜂窝系统(DCS ) 1800频段, 上述第一模块为 GSM模块, 上述第一 控制模块为 GSM控制模块,上述第一模块中可调阶数的滤波器包括可调阶数 的低通滤波器 ( LPF )和 /或可调阶数的有限冲激响应数字滤波器( FIR ); 上 述第二模式为时分同步码分多址接入(TD )模式, 上述第二频段为 F频段, 上述第二模块为 TD模块,上述第二控制模块为 TD控制模块,上述第二模块 滤波器(RRC ) 。
同样地, 上述第一模式为 TD模式, 上述第一频段为 F频段, 上述第一 模块为 TD模块, 上述第一控制模块为 TD控制模块, 上述第一模块中可调阶 数的滤波器包括可调阶数的 LPF和 /或可调阶数的 RRC;上述第二模式为 GSM 模式, 上述第二频段为 DCS1800频段, 上述第二模块为 GSM模块, 上述第 二控制模块为 GSM控制模块,上述第二模块中可调阶数的滤波器包括可调阶 数的 LPF和 /或可调阶数的 FIR。
优选地, 上述第一模块中可调阶数的滤波器位于上述第一模块的第一频 段接收通道中; 上述第二模块中可调阶数的滤波器位于上述第二模块的第二 频段接收通道中。
釆用本发明的技术方案, 能够在终端 GSM模块工作在 DCS频段, 同时 TD模块工作在 F频段时, GAM DCS频段和 TD F频段接收灵敏度受较大影 响的情况下, 改善 TD-SCDMA F频段和 GSM DCS频段的接收灵敏度。
如图 2所示, 是本发明 GSM接收通道实施例的结构示意图, 其中, 低噪 声放大器、 混频器、 低通滤波器 (LPF ) 、 模拟可变增益放大器(VGA ) 、 AD转换器( ADC )、有限冲激响应数字滤波器( Finite Impulse Response, FIR ) 和数字 VGA完成 GSM 900频段的接收功能; 低噪声放大器、 混频器、 可调 低通滤波器(LPF— A ) 、 模拟 VGA, ADC, 可调 FIR ( FIR— A )和数字 VGA 完成 GSM DCS频段的接收功能。
其中, 在该实施例中的 GSM接收通道与现有的 GSM接收通道的区别点 在于, 本发明釆用了 LPF— A和 FIR— A。
如图 3所示, 是本发明 TD-SCDMA接收通道实施例的结构示意图, 其 中, 低噪声放大器、 混频器、 低通滤波器 LPF、 模拟 VGA、 ADC, 均方根升 余弦数字滤波器(RRC )滤波器、 和数字 VGA完成 TD A频段接收功能; 低 噪声放大器、 混频器、 模拟低通滤波器(LPF— A ) 、 模拟 VGA、 ADC, 可调 RRC ( RRC— A )和数字 VGA完成 F频段接收功能。
其中, 在该实施例中的 GSM接收通道与现有的 GSM接收通道的区别点 在于, 本发明釆用了 LPF— A和 RRC— A。
优选地, 当 TD工作在 A频段 (2010MHz— 2025MHz)时, GSM接收通道 中的滤波器 LPF— A的阶数可以设置在低阶模式,从而可以避免接收信号经过 多阶滤波器后通带内信号不必要的衰减; 当 TD工作在 F频段发射状态, 同 时 GSM工作在 DCS接收状态时, 该 GSM接收通道中的 LPF— A设置在高阶 模式,以加强信道外信号的衰减,提高 AD转化器输入信号的信噪比( SNR ) , 从而提高接收灵敏度。
优选地, 当 TD工作在 A频段时, GSM接收通道中的 FIR— A数字滤波器 的阶数设置在低阶模式, 以减小 DSP (数字信号处理)的计算量和处理时间; 当 TD工作在 F频段发射状态, 同时 GSM工作在 DCS接收状态时, 该 GSM 接收通道中的 FIR— A设置在高阶模式, 以加强对泄露进 ADC的信道外信号 的衰减, 提高接收灵敏度。
优选地,当 GSM工作在 GSM900频段时, TD接收通道中的滤波器 LPF— A 的阶数设置在低阶模式, 避免接收信号经过多阶滤波器后通带内信号不必要 的衰减; 当 TD工作在 F频段接收状态, 同时 GSM工作在 DCS发射状态时, 该 TD接收通道中的 LPF— A设置在高阶模式, 以加强信道外信号的衰减, 提 高 AD转化器输入信号的 SNR, 从而提高接收灵敏度。
优选地, 当 GSM工作在 GSM900频段时, TD接收通道中的 FIR— A数字 滤波器的阶数设置在低阶模式, 以减小 DSP的计算量和处理时间; 当 TD工 作在 F频段接收状态, 同时 GSM工作在 DCS发射状态时, 该 TD接收通道 中的 FIR— A设置在高阶模式, 以加强对泄露进 ADC的信道外信号的衰减, 提高接收灵敏度。
如图 4所示,是本发明设置 GSM模块和 TD模块中可调阶数的滤波器实 施例的信息交互示意图,在该实施例中 GSM控制模块向 TD-SCDMA控制模 块上报 GSM模块的工作频段和工作状态, TD控制模块将接收的 GSM模块 的工作频段和工作状态与其检测到的 TD模块的工作频段和工作状态进行对 比, 当 GSM模块工作在 DCS1800,且处于接收状态, TD模块工作在 F频段, 且处于发射状态时, TD控制模块向 GSM控制模块发送设置滤波器的命令, 上述过程在数字基频 (DBB ) 内部完成, GSM控制模块根据上述命令设置 GSM模块内的可调滤波器的阶数; 当 GSM模块工作在 DCS1800, 且处于发 射状态, TD模块工作在 F频段, 且处于接收状态时, TD控制模块设置 TD 模块内可调滤波器的阶数; 具体地, DBB内的 GSM控制模块和 TD控制模 块通过串行外围设备接口 ( SPI )接口设置 GSM模块和 TD模块内部的滤波 器的阶数。
需要说明的是, 图 2中的 GSM接收通道位于图 4中的 GSM模块中, 图 3中的 TD接收通道位于图 4中的 TD模块中。
如图 5所示, 是本发明提高终端接收灵敏度方法实施例的流程图, 该方 法包括:
步骤 501、 GSM模块在工作时, GSM控制模块将 GSM模块当前的工 作频段、 工作信道及工作状态上报给 TD模块;
步骤 502、 TD模块工作时, TD控制模块时时检测上报的 GSM模块的 工作频段、 工作信道和工作状态, 并将其与 TD模块当前的工作频段、 工作 信道和工作状态做对比;
步骤 503、 当 TD模块工作在 F频段, 工作状态为发射状态, GSM模块 工作在 DCS频段, 且处于接收状态时, 则发送设置信息给 GSM控制模块; 步骤 504、 GSM控制模块收到设置信息后, 设置 GSM模块内的可调低 通滤波器 LPF— A的阶数, 以及可调数字滤波器 FIR— A的阶数;
此时, 可调低通滤波器 LPF— A和数字滤波器 FIR— A均工作在高阶状态, 对带外杂散信号的抑制得到加强, ADC输入端的信噪比得到提升, 最终接收 端的灵敏度得到改善;
步骤 505、 当 TD模块工作在 F频段, 工作状态为接收状态, GSM模块 工作在 DCS频段, 且处于发射状态时, TD控制模块设置 TD模块内的可调 模拟滤波器 LPF— A和可调数字滤波器 FIR— A的阶数。
此时, LPF— A和 FIR— A均工作在高阶状态, 对带外杂散信号的抑制得 到加强, ADC输入端的信噪比得到提升, 最终接收端的灵敏度得到改善。
另外, 上述步骤 503和步骤 505为并列执行的步骤, 即步骤 503和步骤
505之间不存在先后时序关系。 如图 6所示, 是本发明终端实施例的结构示意图, 上述终端包括支持第 一模式的第一模块 61和对应的第一控制模块 62, 以及支持第二模式的第二 模块 63和对应的第二控制模块 64, 且上述第一模式中的第一频段和上述第 二模式中的第二频段互为干扰频段, 上述第一模块的第一频段接收通道和上 述第二模块的第二频段接收通道中均包括可调阶数的滤波器; 上述第一控制 模块和第二控制模块设置成: 交互第一模块和第二模块的工作频段和状态信 息, 判断上述第一模块和上述第二模块同时工作在两个模式的干扰频段, 且 两个模式分别处于发射状态和接收状态时, 将处于接收状态的上述第一模块 或上述第二模块中可调阶数的滤波器设置为高阶状态。
其中, 上述第一控制模块是设置成将包括上述第一模块的工作频段和工 作状态的信息发送给上述第二控制模块; 上述第二控制模块是设置成: 如确 定上述第二模块工作在第二频段且处于发射状态, 第一模块工作在第一频段 且处于接收状态时, 则通知上述第一控制模块将上述第一模块中可调阶数的 滤波器设置为高阶状态; 如确定上述第二模块工作在第二频段且处于接收状 态, 第一模块工作在第一频段且处于发射状态时, 则将上述第二模块中可调 阶数的滤波器设置为高阶状态。
另外, 上述第二控制模块还设置成当确定上述第二模块工作在非第二频 段时, 则通知上述第一控制模块将上述第一模块中可调阶数的滤波器设置为 低阶状态。
其中, 上述第一模式为全球移动通讯系统(GSM )模式, 上述第一频段 为数字蜂窝系统(DCS ) 1800频段, 上述第一模块为 GSM模块, 上述第一 控制模块为 GSM控制模块,上述第一模块中可调阶数的滤波器包括可调阶数 的低通滤波器 ( LPF )和 /或可调阶数的有限冲激响应数字滤波器( FIR ); 上 述第二模式为时分同步码分多址接入(TD )模式, 上述第二频段为 F频段, 上述第二模块为 TD模块,上述第二控制模块为 TD控制模块,上述第二模块 滤波器(RRC ) ; 或者, 上述第一模式为 TD模式, 上述第一频段为 F频段, 上述第一模块为 TD模块, 上述第一控制模块为 TD控制模块, 上述第一模块 中可调阶数的滤波器包括可调阶数的 LPF和 /或可调阶数的 RRC;上述第二模 式为 GSM模式, 上述第二频段为 DCS1800频段, 上述第二模块为 GSM模 块,上述第二控制模块为 GSM控制模块,上述第二模块中可调阶数的滤波器 包括可调阶数的 LPF和 /或可调阶数的 FIR。
上述 GSM控制模块和 TD控制模块位于 DBB中。
上述终端可以提高接收的灵敏度, 具体实现方法与提高终端灵敏度的方 法实施例相同, 此处不再赘述。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成, 上述程序可以存储于计算机可读存储介质中, 如只读 存储器、 磁盘或光盘等。 可选地, 上述实施例的全部或部分步骤也可以使用 一个或多个集成电路来实现。 相应地, 上述实施例中的各模块 /单元可以釆用 硬件的形式实现, 也可以釆用软件功能模块的形式实现。 本发明不限制于任 何特定形式的硬件和软件的结合。
以上实施例仅用以说明本发明的技术方案而非限制, 仅仅参照较佳实施 例对本发明进行了详细说明。 本领域的普通技术人员应当理解, 可以对本发 明的技术方案进行修改或者等同替换, 而不脱离本发明技术方案的精神和范 围, 均应涵盖在本发明的权利要求范围当中。
工业实用性
与现有技术相比, 本发明使得终端的 GSM模块工作在 DCS频段, 同时 TD模块工作在 F频段时, GAM DCS频段和 TD F频段接收灵敏度受较大影 响的情况下, 改善 TD F频段和 GSM DCS频段的接收灵敏度。

Claims

权 利 要 求 书
1、一种提高终端接收灵敏度的方法, 所述终端包括支持第一模式的第一 模块和支持第二模式的第二模块, 且所述第一模式中的第一频段和所述第二 模式中的第二频段互为干扰频段, 所述方法包括:
当所述第一模块和所述第二模块同时工作在两个模式的干扰频段, 且在 两个模式分别处于发射状态和接收状态时, 将处于接收状态的所述第一模块 或所述第二模块中可调阶数的滤波器设置为高阶状态。
2、 根据权利要求 1所述的方法, 其中,
将处于接收状态的所述第一模块或所述第二模块中可调阶数的滤波器设 置为高阶状态的步骤包括:
所述第一模块对应的第一控制模块将包括所述第一模块的工作频段和工 作状态的信息发送给与所述第二模块对应的第二控制模块;
所述第二控制模块如确定所述第二模块工作在第二频段且处于发射状 态, 第一模块工作在第一频段且处于接收状态时, 则通知第一控制模块将所 述第一模块中可调阶数的滤波器设置为高阶状态; 以及
所述第二控制模块如确定所述第二模块工作在第二频段且处于接收状 态, 所述第一模块工作在第一频段且处于发射状态时, 则将所述第二模块中 可调阶数的滤波器设置为高阶状态。
3、 根据权利要求 2所述的方法, 其中,
所述第一模式为全球移动通讯系统(GSM )模式, 所述第一频段为数字 蜂窝系统(DCS ) 1800频段, 所述第一模块为 GSM模块, 所述第一控制模 块为 GSM控制模块,所述第一模块中可调阶数的滤波器包括可调阶数的低通 滤波器(LPF )和 /或可调阶数的有限冲激响应数字滤波器(FIR ) ;
所述第二模式为时分同步码分多址接入(TD )模式, 所述第二频段为 F 频段, 所述第二模块为 TD模块, 所述第二控制模块为 TD控制模块, 所述第 弦数字滤波器(RRC ) 。
4、 根据权利要求 2所述的方法, 其中, 所述第一模式为 TD模式, 所述第一频段为 F频段, 所述第一模块为 TD 模块, 所述第一控制模块为 TD控制模块,所述第一模块中可调阶数的滤波器 包括可调阶数的 LPF和 /或可调阶数的 RRC;
所述第二模式为 GSM模式, 所述第二频段为 DCS1800频段, 所述第二 模块为 GSM模块, 所述第二控制模块为 GSM控制模块, 所述第二模块中可 调阶数的滤波器包括可调阶数的 LPF和 /或可调阶数的 FIR。
5、 根据权利要求 1-4任一权利要求所述的方法, 其中,
所述第一模块中可调阶数的滤波器位于所述第一模块的第一频段接收通 道中;
所述第二模块中可调阶数的滤波器位于所述第二模块的第二频段接收通 道中。
6、一种终端, 包括支持第一模式的第一模块和与该第一模块对应的第一 控制模块, 以及支持第二模式的第二模块和与该第二模块对应的第二控制模 块,所述第一模式中的第一频段和所述第二模式中的第二频段互为干扰频段, 其特征在于:
所述第一模块的第一频段接收通道和所述第二模块的第二频段接收通道 中均包括可调阶数的滤波器;
所述第一控制模块和第二控制模块设置成: 交互第一模块和第二模块的 工作频段和状态信息, 判断所述第一模块和所述第二模块同时工作在两个模 式的干扰频段, 且两个模式分别处于发射状态和接收状态时, 将处于接收状 态的所述第一模块或所述第二模块中可调阶数的滤波器设置为高阶状态。
7、 根据权利要求 6所述的终端, 其中,
所述第一控制模块是设置成将包括所述第一模块的工作频段和工作状态 的信息发送给所述第二控制模块;
所述第二控制模块是设置成: 如确定所述第二模块工作在第二频段且处 于发射状态, 第一模块工作在第一频段且处于接收状态时, 则通知所述第一 控制模块将所述第一模块中可调阶数的滤波器设置为高阶状态; 如确定所述 第二模块工作在第二频段且处于接收状态, 第一模块工作在第一频段且处于 发射状态时, 则将所述第二模块中可调阶数的滤波器设置为高阶状态。
8、 根据权利要求 6或 7所述的终端, 其中,
所述第二控制模块还设置成当确定所述第二模块工作在非第二频段时, 则通知所述第一控制模块将所述第一模块中可调阶数的滤波器设置为低阶状 态。
9、 根据权利要求 8所述的终端, 其中,
所述第一模式为全球移动通讯系统(GSM )模式, 所述第一频段为数字 蜂窝系统(DCS ) 1800频段, 所述第一模块为 GSM模块, 所述第一控制模 块为 GSM控制模块,所述第一模块中可调阶数的滤波器包括可调阶数的低通 滤波器(LPF )和 /或可调阶数的有限冲激响应数字滤波器(FIR ) ;
所述第二模式为时分同步码分多址接入(TD )模式, 所述第二频段为 F 频段, 所述第二模块为 TD模块, 所述第二控制模块为 TD控制模块, 所述第 弦数字滤波器(RRC ) 。
10、 根据权利要求 8所述的终端, 其中,
所述第一模式为 TD模式, 所述第一频段为 F频段, 所述第一模块为 TD 模块, 所述第一控制模块为 TD控制模块,所述第一模块中可调阶数的滤波器 包括可调阶数的 LPF和 /或可调阶数的 RRC;
所述第二模式为 GSM模式, 所述第二频段为 DCS1800频段, 所述第二 模块为 GSM模块, 所述第二控制模块为 GSM控制模块, 所述第二模块中可 调阶数的滤波器包括可调阶数的 LPF和 /或可调阶数的 FIR。
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