WO2012119425A1 - Procédé et dispositif de réglage de gain - Google Patents

Procédé et dispositif de réglage de gain Download PDF

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Publication number
WO2012119425A1
WO2012119425A1 PCT/CN2011/079088 CN2011079088W WO2012119425A1 WO 2012119425 A1 WO2012119425 A1 WO 2012119425A1 CN 2011079088 W CN2011079088 W CN 2011079088W WO 2012119425 A1 WO2012119425 A1 WO 2012119425A1
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WO
WIPO (PCT)
Prior art keywords
digital signal
radio frequency
signal
power
mode
Prior art date
Application number
PCT/CN2011/079088
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English (en)
Chinese (zh)
Inventor
梅安华
张家佶
Original Assignee
华为技术有限公司
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201180001506.9A priority Critical patent/CN102369769B/zh
Priority to PCT/CN2011/079088 priority patent/WO2012119425A1/fr
Publication of WO2012119425A1 publication Critical patent/WO2012119425A1/fr

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and device for adjusting gain. Background technique
  • the dynamics of the radio channel of the UE receive dynamic power of the wireless high-frequency signal.
  • the range is large, so the UE introduces a function of automatically adjusting the gain at its RF front end to obtain a smooth signal with a small dynamic range.
  • the dynamic range of the power of the radio frequency front end receiving the wireless high frequency signal is -20 dBm to -110 dBm, and the dynamic range is divided in advance to divide the dynamic range into a plurality of RF gain intervals, and each RF gain interval corresponds to one RF state.
  • Each RF state corresponds to a gain control word; according to the number of divided RF gain intervals, the gear mode used when adjusting the gain can be divided into a coarse division mode and a subdivision mode, and the coarse division mode includes an RF gain.
  • the interval is less than the RF gain interval included in the subdivision mode, so the coarse division mode includes the radio frequency state less than the radio frequency state included in the subdivision mode; in any gear mode, the adjacent radio frequency state corresponds to the RF gain interval There are overlapping intervals in the boundary, thus avoiding frequent jumps between adjacent states.
  • the coarse-division mode shown in FIG. 1 includes five radio frequency states: S0, S1, S2, S3, and S4, and the RF gain intervals corresponding to the two adjacent radio frequency states have overlapping intervals, S0, S1, S2, and S3.
  • Each RF state corresponding to S4 corresponds to a gain control word, and the value of the gain control word corresponding to each radio frequency state is sequentially decreased, that is, the value of the gain control word corresponding to SO is the largest, and the value of the gain control word corresponding to S4 is the smallest;
  • the subdivision mode shown in 2 includes 8 radio states of Z0, Zl, Z2, Z3, Z4, Z5, Z6, Z7, where Z0, Zl, Z2, Z3, Z4, Z5, Z6, Z7 each RF
  • the state corresponds to a gain control word, and the gain control word corresponding to each radio frequency state is sequentially decreased, that is, the gain control word corresponding to Z0 is the largest, and the gain control word corresponding to Z7 is the smallest.
  • the prior art provides a method for adjusting a gain, specifically: acquiring power of a wireless high-frequency signal received by a UE, and determining, according to a current radio frequency state and acquired power of a wireless high-frequency signal, in a currently used gear mode
  • the RF state to be jumped jumps to the determined RF state, and obtains a gain control word corresponding to the determined RF state, and adjusts the gain of the RF front end according to the acquired gain control word.
  • the prior art has at least the following problems: If the coarse-division mode is used, since the coverage of the RF gain interval corresponding to each radio frequency state in the coarse-division mode is larger than the coverage of the RF gain interval corresponding to each radio-frequency state in the subdivision mode, when the power of the wireless high-frequency signal is located In the boundary overlap interval of the RF gain interval corresponding to the current RF state, the gain control word acquired in the coarse division mode may be smaller than the gain control word acquired in the subdivision mode, resulting in a decrease in channel quality, resulting in a lower throughput rate; Subdivision mode, because the gain adjustment speed is slow in the subdivision mode, when a block occurs in the wireless high-frequency signal, the gain of the UE RF front end cannot be adjusted in time, so that the throughput rate becomes low. Summary of the invention
  • Embodiments of the present invention provide a method and apparatus for adjusting gain to improve throughput.
  • the gain of the RF front end of the UE is adjusted.
  • a device for adjusting gain according to an embodiment of the present invention where the device includes:
  • a conversion filtering module configured to convert the received wireless high frequency signal into a digital signal; and filter the digital signal to obtain a filtered digital signal;
  • a block detecting module configured to detect, according to the digital signal before filtering and the filtered digital signal, whether the wireless high frequency signal has a block;
  • a determining module configured to determine a gear mode according to the detected result
  • an adjustment module configured to adjust a gain of the RF front end of the UE in the determined gear mode.
  • the wireless high-frequency signal is converted into a digital signal, and the digital signal is filtered, and according to the digital signal before filtering and the filtered digital signal, whether there is a block in the received wireless high-frequency signal, according to the detected
  • the gear mode used is determined, and in the determined gear mode, the gain of the UE RF front end is adjusted. In this way, it is possible to determine the use of an appropriate gear mode according to whether or not a block is detected in the wireless high-frequency signal, thereby improving the throughput rate.
  • DRAWINGS 1 is a schematic diagram of a first gear mode according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a second gear mode according to an embodiment of the present invention.
  • FIG. 3 is a flow chart of a method for adjusting gain according to Embodiment 1 of the present invention.
  • FIG. 5 is a schematic diagram of a first apparatus for adjusting gain according to Embodiment 3 of the present invention.
  • FIG. 6 is a schematic diagram of a second apparatus for adjusting gain according to Embodiment 3 of the present invention. detailed description
  • an embodiment of the present invention provides a method for adjusting a gain, including:
  • Step 101 Convert the received wireless high frequency signal into a digital signal, and filter the digital signal to obtain a filtered digital signal;
  • Step 102 detecting, according to the digital signal before filtering and the filtered digital signal, whether the received wireless high frequency signal exists in a block;
  • Step 103 Determine a gear mode according to the detected result
  • Step 104 Adjust the gain of the RF front end of the UE in the determined gear mode.
  • the wireless high-frequency signal is converted into a digital signal, and the digital signal is filtered, and according to the digital signal before filtering and the filtered digital signal, whether there is a block in the received wireless high-frequency signal, according to the detected
  • the gear mode used is determined, and in the determined gear mode, the gain of the UE RF front end is adjusted. In this way, it is possible to determine the use of an appropriate gear mode based on the detection of the presence or absence of a block in the wireless high-frequency signal, thereby increasing the throughput.
  • Embodiments of the present invention provide a method of adjusting gain.
  • the radio frequency front end of the UE obtains the radio frequency gain control word by using the method provided in this embodiment, and adjusts the gain of the radio gain control word according to the obtained radio frequency gain control word to obtain a smooth dynamic range. signal.
  • the method provided in this embodiment specifically includes the following steps: Step 201: Converting the received wireless high-frequency signal into a digital signal when receiving the wireless high-frequency signal; specifically, when receiving the wireless high-frequency signal, converting the received wireless high-frequency signal into an analog signal, and then The converted analog signal is converted into a digital signal.
  • Step 202 Statistically calculate the power of the digital signal to obtain the power of the digital signal, and filter the digital signal by using a filter to obtain a filtered digital signal.
  • the RSSI (Received Signal Strength Indicator) value of the digital signal can be used as the power of the digital signal.
  • Step 203 Perform statistics on the power of the filtered digital signal to obtain the power of the filtered digital signal; and detect whether the wireless high-frequency signal has a block according to the power of the digital signal before filtering and the power of the filtered digital signal;
  • the filtered digital signal is statistically obtained to obtain the power of the filtered digital signal, and the difference between the power of the digital signal before filtering and the power of the filtered digital signal is calculated, if the calculated difference exceeds the pre- If the threshold is set, it is detected that there is a block in the wireless high-frequency signal; if the calculated difference does not exceed the preset threshold, it is detected that there is no block in the wireless high-frequency signal.
  • the filter has a certain bandwidth.
  • the wireless high-frequency signal includes a signal outside the bandwidth and a signal in the bandwidth, and the signal outside the bandwidth is a noise signal, and the filter can filter the wireless high-frequency signal when filtering the digital signal.
  • Noise signal outside the bandwidth When there is a block in the received wireless high-frequency signal, the intensity of the noise signal outside the bandwidth in the wireless high-frequency signal will suddenly increase, so the power of the digital signal before filtering and the filtered digital signal are counted. Power, and calculate the difference between the two powers. If the difference exceeds the preset threshold, it detects that there is a block in the received wireless high-frequency signal. Otherwise, it detects that there is no block in the received wireless high-frequency signal.
  • Step 204 Determine a gear mode to be used according to the result of the detecting, where the gear mode includes a first mode and a second mode, where the number of radio states included in the first mode is less than the number of radio states included in the second mode;
  • the gear mode is the first mode
  • the gear mode is the second mode
  • the dynamic range of the power of the wireless high-frequency signal received by the RF front end of the UE is -20 dBm to -110 dBm, and the dynamic range is divided in each gear mode to make each RF state included in each gear mode.
  • the boundary of the RF gain interval corresponding to any adjacent RF state has an overlapping interval, and each RF state corresponds to a gain control word.
  • the first mode shown in FIG. 1 includes radio states of S0, S1, S2, S3, and S4, and each radio frequency state corresponds to one RF gain interval.
  • the RF range corresponding to the SO radio frequency state includes a power range of -20dBm to TOdBm
  • the RF gain range corresponding to the SI radio frequency range includes T0+D0dBm to TldBm
  • the boundary of the RF gain interval corresponding to the SO RF state and the boundary of the RF gain interval corresponding to the S1 RF state overlap.
  • each RF state corresponding gain control word are X0, XI, X2, X3, and B X4 ⁇ X0 ⁇ XKX2 ⁇ X3 ⁇ X4 ;
  • the second mode shown in FIG. 2 includes The radio frequency states are ⁇ 0, Z1, ⁇ 2, ⁇ 3, ⁇ 4, ⁇ 5, ⁇ 6, and ⁇ 7, and each radio frequency state corresponds to one RF gain interval, and the second mode includes a radio frequency state that is more than the radio frequency state included in the first mode, thus The number of RF gain intervals included in the second mode is greater than the number of RF gain intervals included in the first mode.
  • adjacent three RF states may appear respectively.
  • the corresponding gain control words for each RF state are Y0, Yl, ⁇ 2, ⁇ 3, ⁇ 4, ⁇ 5, ⁇ 6 and ⁇ 7 and ⁇ 0 ⁇ 1 ⁇ 2 ⁇ 3 ⁇ 4 ⁇ 5 ⁇ 6 ⁇ 7.
  • Step 205 If the currently used gear mode is the determined gear mode, determining the radio frequency state to be jumped by the wireless high frequency signal according to the current radio frequency state of the wireless high frequency signal and the power of the filtered digital signal;
  • the radio frequency gain interval corresponding to the radio frequency state in which the wireless high frequency signal is currently located is obtained, and if the power of the filtered digital signal is greater than the upper limit value of the radio frequency gain interval corresponding to the current radio frequency state, the wireless high frequency signal is determined.
  • the radio frequency state to be jumped is the previous radio frequency state adjacent to the radio frequency state where the wireless high frequency signal is currently located; if the power of the filtered digital signal is located in the radio frequency gain interval corresponding to the radio frequency state where the wireless high frequency signal is currently located, then Determining that the radio frequency state to be jumped by the wireless high-frequency signal is the radio frequency state in which the wireless high-frequency signal is currently located; if the power of the filtered digital signal is less than the lower limit value of the radio frequency gain interval corresponding to the radio frequency state in which the wireless high-frequency signal is currently located Then, it is determined that the radio frequency state to be jumped by the wireless high-frequency signal is the next radio frequency state adjacent to the radio frequency state where the wireless high-frequency signal is currently located.
  • the gain control word corresponding to the previous radio frequency state of the current radio frequency state is greater than the gain control word corresponding to the current radio frequency state, and the gain control word corresponding to the next radio frequency state of the current radio frequency state is smaller than the current radio frequency state.
  • Corresponding gain control word For example, in the first mode shown in FIG. 1, the gain control words corresponding to the radio frequency states S0, S1, and S2 are X0, XI, X2, respectively, and X0 ⁇ X1 ⁇ X2, assuming the current radio frequency state For the S1, the previous radio frequency state adjacent to the radio frequency state S1 is S0, and the next radio frequency state adjacent to the radio frequency state S1 is S2.
  • the gear mode currently used is the first mode
  • the gear mode to be used is also the first mode and the radio frequency state in which the wireless high frequency signal is currently located is the S1 radio frequency state; acquiring the wireless high frequency signal when The RF gain interval corresponding to the previous SI radio frequency state is an interval including a power range of T0+D0 to T1, if the power of the filtered digital signal is greater than the RF gain interval corresponding to the S1 radio frequency state where the wireless high frequency signal is currently located.
  • the limit value T0+D0 determines that the radio frequency state to be jumped by the wireless high-frequency signal is the previous SO radio frequency state adjacent to the S1 radio frequency state where the wireless high-frequency signal is currently located; if the power of the filtered digital signal is located at the wireless high level In the RF gain interval corresponding to the S1 radio frequency state where the frequency signal is currently located, it is determined that the radio frequency state to be jumped by the wireless high-frequency signal is the S1 radio frequency state in which the wireless high-frequency signal is currently located; if the power of the filtered digital signal is less than wireless
  • the lower limit value T1 of the RF gain interval corresponding to the S1 radio frequency state in which the high frequency signal is currently located determines that the radio frequency state to be jumped by the wireless high frequency signal is the next S2 adjacent to the S1 radio frequency state where the wireless high frequency signal is currently located. RF status.
  • Step 206 If the currently used gear mode is not the determined gear mode, switch to the determined gear mode, and determine the radio frequency state to be jumped by the wireless high frequency signal according to the power of the filtered digital signal;
  • each gear mode is set in advance to correspond to a default radio state. Specifically, switching to the determined gear mode, obtaining the RF gain interval corresponding to the default radio frequency state corresponding to the determined gear mode, if the power of the filtered digital signal is greater than the upper limit of the RF gain interval corresponding to the default radio frequency state, Determining that the radio frequency state to be jumped by the wireless high-frequency signal is the previous radio frequency state adjacent to the default radio frequency state; if the power of the filtered digital signal is within the radio frequency gain interval corresponding to the default radio frequency state, determining the radio high frequency The radio frequency state to be jumped by the signal is the default radio frequency state; if the power of the filtered digital signal is less than the lower limit value of the radio frequency gain interval corresponding to the default radio frequency state, it is determined that the radio frequency state to be jumped by the radio high-frequency signal is the default radio frequency The next RF state adjacent to the state.
  • the gear mode currently used is the second mode
  • the gear mode to be used is the first mode and the default radio state corresponding to the first mode is the S1 radio frequency state
  • the gear mode to be used is the first mode and the default radio state corresponding to the first mode is the S1 radio frequency state
  • Obtaining a radio frequency gain interval corresponding to the default radio frequency state corresponding to the first mode that is, obtaining an RF gain interval corresponding to the S1 radio frequency state, including an interval including a power range of T0+D0 to T1, if the power of the filtered digital signal is greater than the S1 radio frequency
  • the upper limit value T0+D0 of the RF gain interval corresponding to the state determines that the radio frequency state to be jumped by the wireless high-frequency signal is the previous SO radio frequency state adjacent to the S1 radio frequency state; if the power of the filtered digital signal is located at S1 In the RF gain interval corresponding to the radio frequency state, it is determined that the radio frequency state to be jumped by the radio high frequency signal is the
  • Step 207 Jump to the radio frequency state to be jumped by the wireless high-frequency signal, obtain a gain control word corresponding to the radio frequency state to be jumped by the wireless high-frequency signal, and adjust the gain of the UE front end according to the obtained gain control word.
  • the power of the digital signal before filtering and the power of the filtered digital signal are counted, and the wireless high frequency received by the RF front end of the UE is detected according to the power of the digital signal before filtering and the power of the filtered digital signal.
  • the gear mode used is the first mode, so that the speed of adjusting the gain of the RF front end of the UE can be improved, and the throughput rate is improved; if not, the gear mode used is determined to be
  • the second mode avoids that the power of the filtered digital signal in the first mode is located in a boundary overlap interval of the radio frequency interval corresponding to the current radio frequency state, which may make the acquired gain control word smaller than the gain control word acquired in the second mode. The situation occurs, thereby increasing throughput.
  • an embodiment of the present invention provides an apparatus for adjusting a gain, including:
  • a conversion filter module 31 configured to convert the received wireless high frequency signal into a digital signal; and filter the digital signal to obtain a filtered digital signal;
  • the block detecting module 32 is configured to detect, according to the digital signal before filtering and the filtered digital signal, whether a received wireless high frequency signal has a block;
  • a determining module 33 configured to determine a gear mode according to the detected result
  • the adjusting module 34 is configured to adjust a gain of the RF front end of the UE in the determined gear mode.
  • the conversion filter module 31 may include a conversion module 311 and a filter 312;
  • the conversion module 311 is configured to receive the wireless high frequency signal sent by the base station, and then convert the received wireless high frequency signal into a digital signal, and send the converted digital signal to the filter 312 and the block detecting module 32 respectively;
  • a filter 312 configured to filter the digital signal, and send the filtered digital signal to the block detection module
  • the conversion module 311 includes an antenna 31a, an analog conversion unit 31b, and a digital conversion unit 31c;
  • the antenna 31a is configured to receive a wireless high frequency signal sent by the base station, and send the received wireless high frequency signal to the analog conversion unit 31b;
  • the analog conversion unit 31b is configured to receive the wireless high frequency signal, convert the wireless high frequency signal into an analog signal and send the converted analog signal to the digital conversion unit 31c;
  • the digital conversion unit 31 c is configured to receive the analog signal and convert the analog signal into a digital signal, and then send the converted digital signal to the filter 312 and the block detection module 32 respectively.
  • the analog conversion unit 31b may be an RF (Radio Frequency)
  • the digital conversion unit 31c may be an AD (Analog to Digital Converter)
  • the filter 312 may be an RRC (Root-Raised Cosine).
  • the filter, the adjustment module 34 can be AGC (Automatic Gain Control).
  • the block detection module 32 includes:
  • the obtaining unit 321, is configured to obtain the power of the digital signal before filtering and the power of the filtered digital signal; and calculate a difference between the power of the digital signal before filtering and the power of the filtered digital signal;
  • the block detecting unit 322 is configured to detect that a block exists in the received wireless high-frequency signal if the calculated difference exceeds a preset threshold, and if the calculated difference does not exceed a preset threshold, detecting the received wireless high There is no blocko in the frequency signal
  • the obtaining unit 321 includes a first statistic unit 32a, a second statistic unit 32b, and a calculating unit 32c.
  • the first statistic unit 31a is configured to receive the digital signal sent by the converting module 311, and calculate the power of the digital signal to obtain the number. The power of the signal, the power of the digital signal is sent to the computing unit 32c;
  • the second statistic unit 32b is configured to receive the filtered digital signal by the receiving filter 312, calculate the power of the filtered digital signal by using the power of the filtered digital signal, and send the power of the filtered digital signal to the computing unit. 32c and adjustment module 34;
  • the calculating unit 32c is configured to calculate a difference between the power of the digital signal before filtering and the power of the filtered digital signal, and send the calculated difference to the block detecting unit 322.
  • the block detecting unit 322 determines whether the difference sent by the calculating unit 32c exceeds a preset threshold. If it exceeds, it detects that the received wireless high-frequency signal has a block. If not, it detects that the received wireless high-frequency signal does not. There is a block.
  • the determining module 33 is specifically configured to: if the result of the detection is that there is a block in the received wireless high-frequency signal, determine that the gear mode is the first mode, and if the result of the detection is that there is no block in the received wireless high-frequency signal, Then determining that the gear mode is the second mode, wherein the first mode includes a number of radio frequency states that is less than a number of radio frequency states included in the second mode.
  • the adjustment module 34 includes:
  • a determining unit 341, configured to determine, according to the determined radio frequency state of the gear mode and the power of the filtered digital signal, the determined radio frequency state in the determined gear mode;
  • the adjusting unit 342 is configured to obtain a gain control word corresponding to the determined radio frequency state, and according to the acquired gain control word pair
  • the gain of the RF front end of the UE is adjusted.
  • the adjusting unit 342 can send the gain control word to the analog converting unit 31b of the converting module 311, so that the analog converting unit 31b adjusts its own gain according to the gain control word.
  • the determining unit 341 can include
  • a first determining subunit 31a configured to: if the determined gear mode is the same as the currently used gear mode, The radio frequency state of the line high frequency signal and the power of the filtered digital signal determine the radio frequency state to be jumped; the second determining subunit 34b is configured to determine if the determined gear mode is different from the currently used gear mode, Then, switching to the determined gear mode, obtaining a default radio frequency state corresponding to the determined gear mode; determining the radio frequency state to be jumped according to the default radio frequency state and the power of the filtered digital signal.
  • the power of the digital signal before filtering and the power of the filtered digital signal are obtained, and the wireless high frequency received by the RF front end of the UE is detected according to the power of the digital signal before filtering and the power of the filtered digital signal.
  • the gear mode used is the first mode, so that the speed of adjusting the gain of the RF front end of the UE can be improved, and the throughput rate is improved; if not, the gear mode used is determined to be the first
  • the second mode avoids that the power of the filtered digital signal in the first mode is located in the boundary overlap interval of the radio frequency interval corresponding to the current radio frequency state, which may make the acquired gain control word smaller than the gain control word acquired in the second mode. The situation occurs, thereby increasing throughput.

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Abstract

Dans ses modes de réalisation, la présente invention, qui appartient au domaine technique des communications, se rapporte à un procédé et à un dispositif de réglage de gain. Le procédé selon l'invention consiste : à convertir un signal radio de haute fréquence reçu en un signal numérique ; à filtrer le signal numérique de sorte à obtenir un signal numérique filtré ; à détecter, sur la base du signal numérique avant filtrage et du signal numérique après filtrage, si le signal radio de haute fréquence possède, ou non, un bloc ; à déterminer un mode de niveau sur la base d'un résultat de la détection ; et, dans le mode de niveau déterminé, à régler le gain d'une partie frontale radiofréquence d'un équipement d'utilisateur (UE, User Equipment). Le dispositif selon l'invention comprend : un module de conversion et de filtrage ; un module de détection de bloc ; un module de détermination ; et un module de réglage. La solution technique de la présente invention permet d'améliorer le débit.
PCT/CN2011/079088 2011-08-30 2011-08-30 Procédé et dispositif de réglage de gain WO2012119425A1 (fr)

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CN201180001506.9A CN102369769B (zh) 2011-08-30 2011-08-30 一种调整增益的方法及设备
PCT/CN2011/079088 WO2012119425A1 (fr) 2011-08-30 2011-08-30 Procédé et dispositif de réglage de gain

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CN105744611A (zh) * 2014-12-10 2016-07-06 中兴通讯股份有限公司 一种实现功率控制的方法及装置
CN108616974B (zh) * 2016-12-09 2021-05-25 炬芯科技股份有限公司 一种增益和功率的调节方法及装置
CN110099434B (zh) * 2019-05-28 2022-03-25 维沃移动通信有限公司 一种功率调整方法、终端设备及计算机可读存储介质
CN112312534B (zh) * 2020-10-30 2022-08-16 展讯通信(天津)有限公司 接收链路增益的调整方法、系统以及智能终端

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CN101360085A (zh) * 2007-07-31 2009-02-04 美国博通公司 处理通信信号的方法及系统
CN101656543A (zh) * 2008-08-19 2010-02-24 美国博通公司 一种信号处理方法及系统

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CN101360085A (zh) * 2007-07-31 2009-02-04 美国博通公司 处理通信信号的方法及系统
CN101656543A (zh) * 2008-08-19 2010-02-24 美国博通公司 一种信号处理方法及系统

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