WO2014015746A1 - 一种rssi测量方法和rssi测量装置、接收机 - Google Patents

一种rssi测量方法和rssi测量装置、接收机 Download PDF

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WO2014015746A1
WO2014015746A1 PCT/CN2013/079354 CN2013079354W WO2014015746A1 WO 2014015746 A1 WO2014015746 A1 WO 2014015746A1 CN 2013079354 W CN2013079354 W CN 2013079354W WO 2014015746 A1 WO2014015746 A1 WO 2014015746A1
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rssi
receiver
digital domain
power
channel noise
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PCT/CN2013/079354
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English (en)
French (fr)
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吴更石
李峰
宗凯
林森凌
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华为技术有限公司
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Publication of WO2014015746A1 publication Critical patent/WO2014015746A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength

Definitions

  • the present invention relates to the field of communications, and in particular, to an RSSI measurement method, an RSSI measurement device, and a receiver. Background technique
  • RSSI Received Signal Strength Indication
  • a wireless communication system when performing a frequency point scanning, a wireless communication system usually performs RSSI-based measurement to determine whether there is an effective frequency point. At present, most RF receivers exist in the receiver. Therefore, the thermal noise generated by the RF device and the board level may make the RSSI measurement, especially the RSSI measurement in small signal scenarios, inaccurate.
  • the small signal here refers to the signal with smaller RSSI.
  • . 1 is a block diagram showing an exemplary structure of a receiver front end in a wireless communication system. As shown in FIG.
  • the receiver front end may include an antenna, a radio frequency device, an ADC (digital to analog conversion) device, a power calculation device, etc., wherein the antenna is used.
  • the RF device is used for amplifying and filtering the signal received by the antenna
  • the ADC device is used for digitally sampling and processing the amplified and filtered signal of the RF device
  • the power calculation device is used for digitally sampling the ADC device.
  • the signal is used for power calculation and the like.
  • the signal is received from the antenna, it is amplified by the RF device, digitally sampled by the ADC, and then subjected to power calculation to obtain the digital domain received signal strength DRSSI.
  • the gain of the RF device is Gain_RF
  • ADC dBm to The total dB conversion gain is Gain_ADC
  • Gain_RF is mainly determined by the gain given by the RF integrated circuit RFIC
  • Gain_ADC is mainly determined by the effective bit width adopted by the ADC.
  • the existing RSSI estimation method does not remove the influence of channel noise on RSSI estimation.
  • the RSSI of the signal itself is equivalent to the channel noise strength. Therefore, channel noise has a large impact on the RSSI measurement of small signals.
  • the present invention provides an RSSI measurement method, an RSSI measurement device, and a receiver.
  • the present invention provides an RSSI measurement method, characterized in that the method comprises:
  • a difference between a digital domain power dB value of the received signal and a processing gain of the receiver front end is calculated to obtain an RSSI of the receiver front end.
  • the present invention provides an RSSI measuring device, characterized in that the device comprises:
  • a first measuring unit configured to measure a digital domain RSSI outputted by the front end of the receiver
  • a second measuring unit configured to measure channel noise power of the front end of the receiver
  • a first calculating unit configured to calculate a digital domain power dB value of the received signal according to the digital domain RSSI and the channel noise power;
  • a second calculating unit configured to calculate a difference between the digital domain power dB value of the received signal and the processing gain of the receiver front end to obtain an RSSI of the receiver front end.
  • the present invention also provides a receiver comprising the RSSI measuring device.
  • the RSSI measurement method and the RSSI measuring device and the receiver provided by the present invention since the channel noise is considered, the influence of the channel noise is removed when calculating the RSSI, and the accurate RSSI can be obtained, and the existing measurement scheme is solved under the small signal. RSSI measures inaccurate problems. DRAWINGS
  • FIG. 1 is a block diagram showing an exemplary structure of a receiver front end in a wireless communication system
  • Figure 2 shows the measurement results and actual RSSI in a small signal scenario according to the existing RSSI measurement scheme.
  • FIG. 3 is a flow chart of an embodiment of an RSSI measurement method provided in accordance with the present invention.
  • FIG. 4 is a test result of a reduced channel noise scheme provided in accordance with the present invention in a small signal scenario;
  • FIG. 5 is a RSSI measurement provided in accordance with the present invention.
  • the present invention provides an RSSI measurement method.
  • the method includes: Step S101: measuring a digital domain RSSI outputted by a front end of the receiver, which may be recorded as a DRSSI; Step S102, measuring channel noise of the front end of the receiver The power can be recorded as DRSSI_Noise; Step S103, calculating a digital domain power decibel (dB) value of the received signal according to the digital domain RSSI and the channel noise power, denoted as DRSSI_Signal(dB); Step S104, calculating the received The difference between the digital domain power dB value of the signal and the processing gain of the receiver front end (denoted as Gain) is obtained to obtain the RSSI of the receiver front end, denoted RSSI_Signal. Since the channel noise is considered, the influence of the channel noise is removed when calculating the RSSI, and the more accurate RSSI can be obtained, which solves the problem that the existing measurement scheme is inaccurate in the RSSI measurement under the small signal.
  • dB digital domain power deci
  • step S103 may include: converting the digital domain RSSI and the channel noise power into linear values respectively; calculating a difference between the converted linear values; converting the calculated difference into dB The value is taken as the digital domain power dB value of the received signal.
  • step S103 may include channel noise power DRSSI_Noise of the receiver front end measured without an input signal, for example, measurement may be performed in a shielding environment, so that the receiver front end channel noise power can be accurately obtained.
  • the processing gain Gain of the receiver front end is a gain generated by processing the signal after receiving the signal by the receiving end, which may be pre-acquired, preset, or measured before step S104.
  • the processing gain Gain of the receiver front end may include amplification filter gain and/or digital sample gain, and the like.
  • the receiver front end usually amplifies, filters, digitally samples, etc. the signal after receiving the signal, and then outputs it to other devices.
  • the processing gain of the receiver front end may include an amplification filtering gain or a digital sampling gain, and then the digital domain of the received signal may be used in step S104.
  • the power dB value is subtracted from the amplification filter gain or the digital sampling gain to obtain the RSSI of the receiver front end; when the receiver front end performs amplification filtering and digital sampling processing on the signal, the processing gain of the receiver front end may include amplification filtering.
  • the sum of the amplification filter gain and the digital sampling gain can be subtracted from the digital domain power dB value of the received signal in step S104 to obtain the RSSI of the receiver front end.
  • the method further includes: Step S105: Perform frequency offset tracking according to the change of the received signal strength RSSI_Signal of the receiver front end. Therefore, the fast tracking of the frequency offset can be realized according to the change of the RSSI after the RSSI is acquired. For the scene where the common AFC circuit is abruptly changed, the method of latching and discriminating can be used to achieve fast tracking of the fast changing frequency offset.
  • the RSSI measurement method provided by the present invention is described by a specific example.
  • the method may include: measuring the digital domain power DRSSI (dB), and the measured DRSSI actually includes the signal power and channel actually received by the receiving end.
  • Word field power DRSSI_Signal + DRSSI_Noise
  • DRSSI_Noise the power of the channel noise in the digital domain is measured, DRSSI_Noise, and the noise power of the channel can be in dB, which is recorded as DRSSI_Noise(dB);
  • the measured output power of the receiver front end is DRSSI and channel noise power
  • At least one of the DRSSI_Noise is in dB, and is converted into a power linear value, that is, the measured DRSSI (dB) and DRSSI_Noise (dB) are respectively converted into linear values DRSSI and DRSSI_Noise;
  • RSSI_Signal(dBm) DRSSI_Signal(dB) - (Gain_RF + Gain_ADC), and the result is the signal strength RSSI_Signal actually received by the antenna port.
  • the method for obtaining the RSSI of the front end of the receiver provided by the present invention is shown in Fig. 3.
  • the present invention uses an experimental method to estimate the channel noise intensity, and subtracts the influence of the channel noise in the linear domain from the digital domain power of the received signal to calculate the input signal of the antenna port in the digital domain.
  • the power in turn, obtains the actual RSSI of the antenna port.
  • the calculated RSSI is very close to the actual received signal strength RSSI of the antenna port. Therefore, the method can accurately estimate the RSSI of the signal when the input signal strength is small.
  • the present invention provides an RSSI measuring device. As shown in FIG.
  • the device includes: a first measuring unit 110, configured to measure a digital domain received signal strength DRSSI outputted by a front end of the receiver; and a second measuring unit 120, configured to measure a channel noise power DRSSI_Noise of the receiver front end; a first calculating unit 130, configured to calculate a digital domain power dB value of the received signal according to the digital domain RSSI and the channel noise power; and a second calculating unit 140, configured to calculate And a difference between the digital domain power dB value of the received signal and the processing gain Gain of the receiver front end to obtain a received signal strength RSSI_Signal of the receiver front end.
  • the first calculating unit 130 is configured to: convert the digital domain RSSI and the channel noise power into linear values respectively; calculate a difference between the converted linear values; The difference is converted to a dB value as the digital domain power dB value of the received signal.
  • the second measuring unit 120 is configured to measure channel noise power of the receiver front end without an input signal.
  • the processing gain of the receiver front end comprises an amplification filter gain and/or a digital sampling gain.
  • the device further includes: a frequency offset tracking unit 150, configured to perform frequency offset tracking according to a change of the RSSI of the receiver front end.
  • a frequency offset tracking unit 150 configured to perform frequency offset tracking according to a change of the RSSI of the receiver front end.
  • the present invention also provides a receiver comprising the RSSI measuring device.
  • the method for measuring RSSI provided by the present invention can be used for RSSI measurement in a wireless communication system, and the method is especially suitable for RSSI measurement under small signal strength, which solves the inaccuracy of RSSI measurement in a small signal scenario.
  • the RSSI measuring apparatus and receiver provided by the present invention also have the above advantages.
  • the above description is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. It is considered as the scope of protection of the present invention.
  • the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
  • the foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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  • Physics & Mathematics (AREA)
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Abstract

本发明提供一种RSSI测量方法和RSSI测量装置、接收机，该方法包括：测量接收机前端输出的数字域RSSI；测量所述接收机前端的通道噪声功率；根据所述数字域RSSI和所述通道噪声功率计算得到接收信号的数字域功率dB值；计算所述接收信号的数字域功率dB值和所述接收机前端的处理增益的差值，以获得所述接收机前端的RSSI。从而在计算RSSI时将通道噪声的影响去除，能够获取较准确的RSSI，解决了现有测量方案在小信号下RSSI测量不准确的问题。

Description

一种 RSSI测量方法和 RSSI测量装置、 接收机
本申请要求于 2012 年 07 月 25 日提交中国专利局、 申请号为 201210259433.X, 发明名称为 "一种 RSSI测量方法和 RSSI测量装置、 接收 机" 的中国专利申请的优先权， 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及通信领域， 具体涉及一种 RSSI测量方法和 RSSI测量装置、 接收机。 背景技术
在无线通信系统中，通常需要测量接收信号强度（ Received Signal Strength Indication, RSSI ), 例如无线通信系统在进行频点扫描时， 通常都是基于 RSSI 的测量来确定是否存在有效频点。 目前大多数接收机中都存在射频接收部分， 因此射频器件及电路板级产生的热噪声会使得 RSSI测量尤其是小信号场景下 的 RSSI测量不准确， 这里的小信号是指 RSSI较小的信号。 图 1为无线通信系统中的接收机前端的示例性结构框图，如图 1所示， 该 接收机前端可以包括天线、 射频器件、 ADC (数模转换）器件、 功率计算器件 等， 其中天线用于接收输入信号，射频器件用于对天线接收到的信号进行放大 滤波等处理， ADC 器件用于对射频器件放大滤波后的信号进行数字采样等处 理， 功率计算器件用于对 ADC器件数字采样后的信号进行功率计算等。 在图 1中，信号从天线处接收下来后，经过射频器件的放大滤波、 ADC数字采样后， 再经过功率计算， 得到数字域接收信号强度 DRSSI; 假设射频器件的增益为 Gain_RF, ADC及 dBm至 dB转换增益合计为 Gain_ADC, 则天线处的接收信 号强度 RSSI可以通过下面的公式计算： RSSI(dBm) = DRSSI(dB) - (Gain_RF + Gain—ADC) 其中， Gain_RF主要是由射频集成电路 RFIC给出的增益决定； Gain_ADC 主要由 ADC采用的有效位宽决定。
目前的估计 RSSI的方法中，假设 Gain_RF和 Gain_ADC的取值与通道的 噪声系数（NF, Noise Figure )是不相关的， 因此， 现有的 RSSI估计方法没有 去除通道噪声对 RSSI估计的影响。 当接收信号强度 RSSI较大时， 通道噪声 与信号强度相比非常小， 对大信号强度下的 RSSI测量影响较小； 当接收信号 强度较小时（例如 RSSI<=-100dBm时）， 由于此时信号本身的 RSSI和通道噪 声强度相当， 因此， 通道噪声会对小信号的 RSSI测量产生较大影响。
假设输入信号的强度在 -lOOdBm 到 -106dBm 间变化， 通道噪声系数 ( NF ) >=6dB, 即通道噪声强度大于 -102dBm, 图 2中对在上述较小信号接收 强度条件下根据现有 RSSI测量方法的测量结果与实际 RSSI进行了比较。 从 测试结果来看， 由于通道噪声的影响， 现有方案下对小信号强度下的 RSSI测 量结果与天线处实际接收到的天线口 RSSI之间存在较大误差， 对于小信号下 的 RSSI测量是不准确的。 发明内容
针对现有 RSSI测量方案对于 RSSI测量尤其是对小信号下的 RSSI测量不 准确的问题， 本发明提供一种 RSSI测量方法和 RSSI测量装置、 接收机。
本发明提供一种 RSSI测量方法， 其特征在于， 该方法包括：
测量接收机前端输出的数字域 RSSI;
测量所述接收机前端的通道噪声功率；
根据所述数字域 RSSI和所述通道噪声功率计算得到接收信号的数字域功 率 dB值；
计算所述接收信号的数字域功率 dB值和所述接收机前端的处理增益的差 值， 以获得所述接收机前端的 RSSI。
本发明提供一种 RSSI测量装置， 其特征在于， 该装置包括：
第一测量单元， 用于测量接收机前端输出的数字域 RSSI;
第二测量单元， 用于测量所述接收机前端的通道噪声功率；
第一计算单元， 用于根据所述数字域 RSSI和所述通道噪声功率计算得到 接收信号的数字域功率 dB值；
第二计算单元， 用于计算所述收信号的数字域功率 dB值和所述接收机前 端的处理增益的差值， 以获得所述接收机前端的 RSSI。
本发明还提供一种接收机， 该接收机包括所述的 RSSI测量装置。
根据本发明提供的 RSSI测量方法和 RSSI测量装置、 接收机， 由于考虑 了通道噪声，在计算 RSSI时将通道噪声的影响去除，能够获取较准确的 RSSI, 解决了现有测量方案在小信号下 RSSI测量不准确的问题。 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施 例或现有技术描述中所需要使用的附图作筒单地介绍，显而易见地， 下面描述 中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付 出创造性劳动性的前提下， 还可以根据这些附图获得其他的附图。 其中：
图 1为无线通信系统中的接收机前端的示例性结构框图；
图 2为根据现有 RSSI测量方案在小信号场景下测量结果与实际 RSSI的 比较；
图 3为根据本发明提供的 RSSI测量方法的一种实施方式的流程图； 图 4为根据本发明提供的减通道噪声方案在小信号场景下测试结果； 图 5为根据本发明提供的 RSSI测量装置的一种实施方式的结构框图。 具体实施方式
下面结合附图对本发明进行详细描述。
本发明提供了一种 RSSI测量方法，如图 3所示，该方法包括： 步骤 S101 , 测量接收机前端输出的数字域 RSSI, 可以记为 DRSSI; 步骤 S102, 测量所述 接收机前端的通道噪声功率， 可以记为 DRSSI_Noise; 步骤 S103, 根据所述 数字域 RSSI和所述通道噪声功率计算得到接收信号的数字域功率分贝 （ dB ) 值， 记为 DRSSI_Signal(dB); 步骤 S104, 计算所述收信号的数字域功率 dB值 和所述接收机前端的处理增益（记为 Gain ) 的差值， 以获得所述接收机前端 的 RSSI, 记为 RSSI_Signal。 由于考虑了通道噪声， 在计算 RSSI时将通道噪 声的影响去除，能够获取较准确的 RSSI,解决了现有测量方案在小信号下 RSSI 测量不准确的问题。
其中所述 RSSI也可以为接收信号功率， 所获得的接收机前端的 RSSI可 以为天线口的 RSSI。 根据一种实施方式， 步骤 S103可以包括： 将所述数字域 RSSI和所述通道噪声功率分别转换成线性值； 计算转换后的线性值之间的差 值； 将计算得到的差值转换成 dB值， 以作为接收信号的数字域功率 dB值。
优选地， 步骤 S103可以包括在无输入信号下测量的所述接收机前端的通 道噪声功率 DRSSI_Noise, 例如可以在屏蔽环境中进行测量， 从而可以准确地 得到所述接收机前端通道噪声功率。 其中所述接收机前端的处理增益 Gain为接收端接收到信号后对该信号进 行处理而产生的增益，其可以是预先获取的，预先设定好的，或者在步骤 S104 之前测量到的。
所述接收机前端的处理增益 Gain可以包括放大滤波增益和 /或数字采样增 益等。 所述接收机前端在接接收到信号后通常会对信号进行放大、 滤波、 数字 采样等处理， 然后再输出给其他设备。 当所述接收机前端对信号进行了放大滤 波或数字采样处理时，所述接收机前端的处理增益可以包括放大滤波增益或数 字采样增益， 则在步骤 S104中可以将所述接收信号的数字域功率 dB值减去 放大滤波增益或数字采样增益， 得到接收机前端的 RSSI; 当所述接收机前端 对信号进行了放大滤波和数字采样处理时，所述接收机前端的处理增益可以包 括放大滤波增益和数字采样增益二者， 则在步骤 S104中可以将所述接收信号 的数字域功率 dB值减去放大滤波增益和数字采样增益二者的和， 得到接收机 前端的 RSSI。
优选地， 该方法还包括： 步骤 S105, 根据所述接收机前端的接收信号强 度 RSSI_Signal的变化进行频偏跟踪。从而能够在获取 RSSI之后根据 RSSI的 变化实现对频偏的快速跟踪， 对于常用 AFC电路在频偏突变的场景， 可以利 用锁存鉴频的方法实现对快速变化频偏的快速跟踪。
下面通过一个具体实例对本发明提供的 RSSI测量方法进行说明， 该方法 可以包括： 测量得到的数字域功率 DRSSI ( dB ), 该测量到的 DRSSI实际上包 含了接收端实际接收到的信号功率与通道噪声功率二者之和， 即 DRSSI= DRSSI_Signal + DRSSI_Noise , 其中 DRSSI 为测量得到的数字域功率、 DRSSI_Signal为输入信号的数字域功率、 DRSSI_Noise ( dB )为通道噪声的数 字域功率；
在屏蔽环境中， 没有输入信号的场景下， 测试得到通道噪声在数字域的功 率 DRSSI_Noise , 该通道噪声功率可以是以 dB 为单位的， 记为 DRSSI_Noise(dB);
可选地， 如果所测量到的接收机前端的输出功率 DRSSI和通道噪声功率
DRSSI_Noise中的至少一者是以 dB为单位的， 则将其转换为功率线性值， 即 将测量得到的 DRSSI(dB)和 DRSSI_Noise(dB)分别转换成线性值 DRSSI 和 DRSSI—Noise;
计算得到信号的功率线性值 DRSSI_Signal = DRSSI - DRSSI_Noise, 得到 线性域的信号功率；
将 DRSSI_Signal转换为 dB值 DRSSI_Signal(dB);
计算得到真实 的天线 口 的 RSSI_Signal： RSSI_Signal(dBm) = DRSSI_Signal(dB) - (Gain_RF + Gain_ADC), 得到的结果就是天线口实际接收 到的信号强度 RSSI_Signal。
采用与本发明背景技术部分提及的小信号强度条件进行测试，假设输入信 号强度在 -lOOdBm到 -106dBm 间变化； 通道噪声系数 ( NF ) >=6dB。 采用本 发明提供的用于获取接收机前端的 RSSI的方法， 测试结果如图 3所示。
从测试结果可以看出， 由于本发明采用了实验的方法估计通道噪声强度、 并从接收信号的数字域功率中在线性域减去通道噪声的影响来计算得到天线 口的输入信号在数字域的功率，进而得到天线口实际的 RSSI,所计算出的 RSSI 与天线口实际接收的信号强度 RSSI非常接近， 因此该方法在输入信号强度较 小的情况下， 能够准确估计出信号的 RSSI。 本发明提供一种 RSSI测量装置， 如图 5所示， 该装置包括： 第一测量单 元 110, 用于测量接收机前端输出的数字域接收信号强度 DRSSI; 第二测量单 元 120, 用于测量所述接收机前端的通道噪声功率 DRSSI_Noise; 第一计算单 元 130, 用于根据所述数字域 RSSI和所述通道噪声功率计算得到接收信号的 数字域功率 dB值； 第二计算单元 140, 用于计算所述收信号的数字域功率 dB 值和所述接收机前端的处理增益 Gain的差值， 以获得所述接收机前端的接收 信号强度 RSSI_Signal。
根据一种实施方式， 所述第一计算单元 130用于： 将所述数字域 RSSI和 所述通道噪声功率分别转换成线性值； 计算转换后的线性值之间的差值； 将计 算得到的差值转换成 dB值， 以作为接收信号的数字域功率 dB值。
其中所述第二测量单元 120 用于在无输入信号下测量的所述接收机前端 的通道噪声功率。
优选地， 所述接收机前端的处理增益包括放大滤波增益和 /或数字采样增 益。
优选地， 所述装置还包括： 频偏跟踪单元 150, 用于根据所述接收机前端 的 RSSI的变化进行频偏跟踪。
本发明还提供一种接收机， 该接收机包括所述的 RSSI测量装置。
因此， 对于无线通信系统中的 RSSI测量都可以使用本发明提供的用于测 量 RSSI的方法， 并且本方法尤其适用于小信号强度下的 RSSI测量， 解决了 在小信号场景下 RSSI测量不准确的问题， 本发明提供的 RSSI测量装置和接 收机也具有上述优点。 以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通 技术人员来说， 在不脱离本发明原理的前提下， 还可以作出若干改进和润饰， 这些改进和润饰也应视为本发明的保护范围。
本领域普通技术人员可以理解：实现上述方法实施例的全部或部分步骤可 以通过程序指令相关的硬件来完成，前述的程序可以存储于一计算机可读取存 储介质中， 该程序在执行时， 执行包括上述方法实施例的步骤； 而前述的存储 介质包括： ROM、 RAM, 磁碟或者光盘等各种可以存储程序代码的介质。

Claims

权 利 要 求
1、 一种接收信号强度 RSSI测量方法， 其特征在于， 包括：
测量接收机前端输出的数字域 RSSI;
测量所述接收机前端的通道噪声功率；
根据所述数字域 RSSI和所述通道噪声功率计算得到接收信号的数字域功 率分贝 dB值；
计算所述接收信号的数字域功率 dB值和所述接收机前端的处理增益的差 值， 以获得所述接收机前端的 RSSI。
2、 根据权利要求 1所述的方法， 其特征在于， 所述根据所述数字域 RSSI 和所述通道噪声功率计算得到接收信号的数字域功率 dB值包括：
将所述数字域 RSSI和所述通道噪声功率分别转换成线性值；
计算转换后的线性值之间的差值；
将计算得到的差值转换成 dB值， 以作为接收信号的数字域功率 dB值。
3、 根据权利要求 1或 2所述的方法， 其特征在于， 所述测量所述接收机 前端的通道噪声功率包括：
在无输入信号下测量的所述接收机前端的通道噪声功率。
4、 根据权利要求 1或 2所述的方法， 其特征在于， 其中所述接收机前端 的处理增益包括放大滤波增益和数字采样增益。
5、 根据权利要求 1或 2所述的方法， 其特征在于， 该方法还包括： 根据所述接收机前端的 RSSI的变化进行频偏跟踪。
6、 一种 RSSI测量装置， 其特征在于， 该装置包括：
第一测量单元， 用于测量接收机前端输出的数字域 RSSI;
第二测量单元， 用于测量所述接收机前端的通道噪声功率；
第一计算单元， 用于根据所述数字域 RSSI和所述通道噪声功率计算得到 接收信号的数字域功率 dB值；
第二计算单元， 用于计算所述收信号的数字域功率 dB值和所述接收机前 端的处理增益的差值， 以获得所述接收机前端的 RSSI。
7、 根据权利要求 6所述的装置， 其特征在于， 所述第一计算单元用于： 将所述数字域 RSSI和所述通道噪声功率分别转换成线性值； 计算转换后的线 性值之间的差值； 将计算得到的差值转换成 dB值， 以作为接收信号的数字域 功率 dB值。
8、 根据权利要求 6或 7所述的装置， 其特征在于， 所述第二测量单元用 于在无输入信号下测量的所述接收机前端的通道噪声功率。
9、 根据权利要求 6或 7所述的装置， 其特征在于， 所述接收机前端的处 理增益包括放大滤波增益和 /或数字采样增益。
10、 根据权利要求 6或 7所述的装置， 其特征在于， 该装置还包括： 频偏跟踪单元， 用于根据所述接收机前端的 RSSI的变化进行频偏跟踪。
11、 一种接收机， 其特征在于， 该接收机包括权利要求 5-10 中任一权利 要求所述的 RSSI测量装置。
PCT/CN2013/079354 2012-07-25 2013-07-15 一种rssi测量方法和rssi测量装置、接收机 WO2014015746A1 (zh)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11143752B2 (en) 2019-08-08 2021-10-12 GM Global Technology Operations LLC Method for detecting position error in remote sensors with geometric constraints
CN117081687A (zh) * 2023-10-10 2023-11-17 四川思凌科微电子有限公司 一种rssi数据采样方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102820937A (zh) * 2012-07-25 2012-12-12 华为技术有限公司 一种rssi测量方法和rssi测量装置、接收机
CN104469825B (zh) * 2015-01-04 2018-11-30 华为技术有限公司 Gsm的从模信息的测量方法和装置
CN106921449A (zh) * 2017-03-09 2017-07-04 湖南基石通信技术有限公司 基于射频捷变收发器的信噪比确定方法及通信设备
CN111313950B (zh) * 2018-12-11 2023-06-20 北京小米移动软件有限公司 天线控制方法及装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1722873A (zh) * 2004-07-13 2006-01-18 华为技术有限公司 基站上行接收通道校正方法
US20070197178A1 (en) * 2006-02-21 2007-08-23 Nokia Corporation Automatic gain control system for receivers in wireless communications
CN101562484A (zh) * 2009-06-01 2009-10-21 北京北方烽火科技有限公司 一种适用于ofdm系统的信道质量测量方法
CN102187588A (zh) * 2011-04-13 2011-09-14 华为技术有限公司 无线接收机中自动增益调整的方法及装置
CN102820937A (zh) * 2012-07-25 2012-12-12 华为技术有限公司 一种rssi测量方法和rssi测量装置、接收机

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7072632B2 (en) * 2003-10-10 2006-07-04 Vixs, Inc. Fast signal detection process
CN1790958A (zh) * 2004-12-17 2006-06-21 中兴通讯股份有限公司 接收信号强度指示信号检测装置及其方法
CN101515810A (zh) * 2009-04-10 2009-08-26 华为技术有限公司 一种测量系统噪声的方法、装置和系统
CN102256282B (zh) * 2010-05-19 2014-08-13 中兴通讯股份有限公司 移动终端快速扫频的方法、装置及移动终端

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1722873A (zh) * 2004-07-13 2006-01-18 华为技术有限公司 基站上行接收通道校正方法
US20070197178A1 (en) * 2006-02-21 2007-08-23 Nokia Corporation Automatic gain control system for receivers in wireless communications
CN101562484A (zh) * 2009-06-01 2009-10-21 北京北方烽火科技有限公司 一种适用于ofdm系统的信道质量测量方法
CN102187588A (zh) * 2011-04-13 2011-09-14 华为技术有限公司 无线接收机中自动增益调整的方法及装置
CN102820937A (zh) * 2012-07-25 2012-12-12 华为技术有限公司 一种rssi测量方法和rssi测量装置、接收机

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11143752B2 (en) 2019-08-08 2021-10-12 GM Global Technology Operations LLC Method for detecting position error in remote sensors with geometric constraints
CN117081687A (zh) * 2023-10-10 2023-11-17 四川思凌科微电子有限公司 一种rssi数据采样方法
CN117081687B (zh) * 2023-10-10 2023-12-15 四川思凌科微电子有限公司 一种rssi数据采样方法

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