WO2010069203A1 - 多载波系统中功率定标的方法与系统 - Google Patents
多载波系统中功率定标的方法与系统 Download PDFInfo
- Publication number
- WO2010069203A1 WO2010069203A1 PCT/CN2009/074574 CN2009074574W WO2010069203A1 WO 2010069203 A1 WO2010069203 A1 WO 2010069203A1 CN 2009074574 W CN2009074574 W CN 2009074574W WO 2010069203 A1 WO2010069203 A1 WO 2010069203A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- carrier
- power
- baseband
- gain
- antenna port
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
- H04W52/42—TPC being performed in particular situations in systems with time, space, frequency or polarisation diversity
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2626—Arrangements specific to the transmitter only
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
Definitions
- the present invention relates to a carrier calibration method and system, and more particularly to a method and system for power calibration in a multi-carrier system.
- the forward transmit power determines the forward coverage of the system, but the forward coverage is also limited by the reverse coverage.
- the forward coverage of the system is too large, the user terminal can receive the transmission signal of the base station, but the user terminal beyond the cell range cannot access the wireless communication system; meanwhile, in the cellular communication system, if Too large coverage, exceeding the requirements of the pre-network planning design, will cause interference between adjacent cells, resulting in a decline in the capacity of the communication system.
- the forward transmit power is an important indicator to ensure the coverage, capacity and performance of the wireless communication network. Therefore, in a multi-carrier wireless communication system, it is necessary to scale the transmission power of each carrier.
- the purpose of carrier power calibration is to make the transmit carrier power of the multi-carrier wireless communication system reach the preset target value.
- the sum of the output power of multiple carriers must be smaller than the power amplifier. The maximum output power is wide, so the system needs to support both carrier power measurement and total power measurement when performing power calibration.
- FIG. 1 is a schematic structural diagram of carrier modulation in a multi-carrier system.
- a baseband signal of each carrier in a multi-carrier system is subjected to baseband gain adjustment by a baseband gain adjustment unit, and then frequency-modulated by an up-conversion processing unit.
- the baseband signal is carried on the high frequency signal, and the high frequency signal is amplified by the power of the power amplifier, and then transmitted through the antenna connected to the duplexer.
- the existing carrier power calibration method firstly determines the total power of the transmitted signal by adjusting the total power of the signal transmitted by the antenna port, and adjusting the gain of the RF link. Then, the gain of the fixed RF link sequentially detects the transmit power of each carrier, compares the transmit power of each carrier with a preset target value, and then adjusts the gain of the baseband signal gain unit, and the transmit power of each carrier detected at the antenna port. The carrier transmit power setting target value is satisfied.
- the existing calibration method first performs total power calibration and then fine-tunes the baseband power per carrier. During the calibration adjustment process, the total base power of the digital-to-analog converter output to the system fluctuates.
- the change does not meet the requirements of peak clipping and digital predistortion processing in the multi-carrier system to keep the input baseband power constant, and the wireless performance indicators of the system such as code domain power and adjacent channel power rejection ratio may also be affected. After the calibration adjustment is completed, the wireless performance of the multi-carrier system will be seriously affected.
- the main object of the present invention is to provide a method and system for power calibration in a multi-carrier system, which can keep the sum of baseband power of each carrier constant during the calibration adjustment process, and fully utilize the dynamic range of the digital-to-analog converter. , improve the output performance of the system downlink signal.
- a method of power scaling in a multi-carrier system comprising:
- the carrier baseband power is scaled and adjusted according to the baseband gain adjustment coefficient.
- the scaling of each carrier baseband power is performed, specifically:
- the product of the baseband gain adjustment coefficient and the current baseband power of each carrier is used as the to-be-adjusted power of each carrier.
- the determining a difference in gain between the radio channels of each carrier is specifically:
- Measure the transmit power of each carrier of the antenna port under the same conditions determine one of the carriers as the reference carrier according to the configured antenna port target power and the measured antenna port power, and the difference between the transmit power of each carrier and the reference carrier is poor.
- the value is the difference in gain.
- the same condition is: the carrier baseband power is the same, the carrier baseband gain adjustment coefficient is the same, and the carrier's radio frequency link gain adjustment control word is the same.
- the method further includes: setting a reference carrier, and measuring a transmit power of the reference carrier of the antenna port, according to the reference The antenna port target power of the carrier determines a transmission power scaling adjustment amount of the reference carrier, and each carrier performs transmission power scaling adjustment according to a transmission power scaling adjustment amount of the reference carrier.
- a system for power scaling in a multi-carrier system comprising:
- a gain difference determining unit configured to determine a gain difference between each carrier radio frequency channel
- a target power acquiring unit configured to acquire an antenna port target power of each carrier
- a baseband gain adjustment coefficient determining unit configured to determine a baseband gain adjustment coefficient of each carrier according to the gain difference and a baseband target power of each carrier; and a baseband carrier power scaling unit configured to adjust the coefficient according to the baseband gain The baseband power of each carrier is scaled and adjusted.
- the baseband carrier power calibration unit performs scaling adjustment on each carrier baseband power, specifically: using the product of the baseband gain adjustment coefficient and the current baseband power of each carrier as the to-be-adjusted power of each carrier.
- the gain difference determining unit determines a gain difference between each carrier radio frequency channel, specifically:
- the same condition is: the baseband carrier power is the same, the carrier baseband gain adjustment coefficient is the same, and the carrier's radio frequency link gain adjustment control word is the same.
- the system further comprises:
- a reference carrier transmit power measuring unit configured to measure a transmit power of a reference carrier set by the antenna port
- a transmit power calibration unit configured to determine, according to an antenna port target power of the reference carrier, a transmit power calibration adjustment amount of the reference carrier, and each carrier performs a transmit power calibration according to a transmit power calibration adjustment amount of the reference carrier Adjustment.
- the invention first determines a gain difference between each baseband carrier RF channel, and determines a baseband gain adjustment coefficient of each carrier according to the difference of the gain and the target power of each carrier, according to the baseband gain adjustment
- the integral coefficient adjusts the baseband power of each carrier; then sets the reference carrier of the RF power calibration, adjusts the RF link gain according to the reference carrier, so that the reference carrier antenna port power meets the calibration power requirement of the carrier, when the reference carrier
- the calibration power requirement of the carrier is met, the power of the remaining carriers also satisfies the calibration power requirement, and it is necessary to check whether the total power of the antenna port satisfies the total power convergence requirement.
- the total baseband power is guaranteed to be constant, thereby satisfying the requirement that the peak clipping and digital predistortion processing in the multi-carrier system keep the input baseband total power constant, and improve the downlink signal.
- the signal-to-noise ratio ensures the performance of the multi-carrier system.
- 1 is a schematic structural diagram of carrier modulation in a multi-carrier system
- FIG. 2 is a schematic flowchart of a method for power calibration in a multi-carrier system according to an embodiment of the present invention
- FIG. 3 is a schematic structural diagram of a system for power calibration in a multi-carrier system according to an embodiment of the present invention.
- the basic idea of the invention is: firstly determining the gain difference between the baseband carrier RF channels, and then acquiring the antenna port target power of each carrier, and determining the baseband gain adjustment coefficient of each carrier according to the gain difference and the antenna port target power of each carrier. According to the baseband gain adjustment coefficient, the baseband power of each carrier is scaled and adjusted; then the reference carrier of the radio frequency power calibration is set, and the RF link gain adjustment is performed according to the reference carrier, so that the reference carrier antenna port power satisfies the calibration of the carrier. Power requirement, when the reference carrier satisfies the calibration power requirement of the carrier, the power of the remaining carriers also meets the calibration power requirement, and it is necessary to check whether the total power of the antenna port satisfies the total power convergence requirement.
- the total baseband power is guaranteed to be constant, thereby satisfying the requirement that the peak clipping and digital predistortion processing in the multi-carrier system keep the input baseband total power constant, and improve the downlink signal.
- the signal-to-noise ratio ensures the performance of the multi-carrier system.
- Step 201 Determine a gain difference between each carrier RF channel, obtain an antenna port target power of each carrier, and determine a baseband gain adjustment coefficient of each carrier according to the gain difference and a baseband target power of each carrier.
- the difference in transmit power of each carrier antenna port is tested, that is, the gain difference of the link between each carrier is calculated.
- the same conditions that is, the carrier baseband power is the same, the baseband gain adjustment coefficient is the same, and the carrier's RF link gain adjustment control word is the same, that is, the gain adjustment amount is the same every time between carriers.
- the carrier is configured with n carriers in the multi-carrier system; to / for example, and the carrier is used as the reference carrier, the difference in gain between the carriers (in dB) is from ; to:
- X n Gain fn - Gain fl determines the target power of each carrier by querying the configuration information of the system, that is, determines the transmission target power at each carrier antenna port in the system, 4 sets the carrier; the target power corresponding to f n respectively For P n .
- the ratio of each carrier gain adjustment factor is R:
- the difference between the power ⁇ and G ⁇ « is taken as the index of 10 because the power is in dBm, and the base 10 logarithm has been taken when calculating the carrier power, and 20
- the denominator that is the difference between P and Gain is a squared operation when calculating the carrier power.
- the gain adjustment coefficients of carrier_; to / -- are:
- K 2 R 2 xK ]
- K n R n xK
- ⁇ is the default value, which is based on the peak clipping capability of the multi-carrier system, in the analog-to-digital converter
- DAC DAC
- ⁇ ft ensures that the total power of the baseband does not change.
- K is used as the coefficient of power gain adjustment of each carrier in the calibration process, that is, each time the baseband gain is adjusted, the coefficient K of each carrier is integrated with the current baseband power of the carrier, that is, the baseband carrier is The power to be adjusted.
- the baseband power adjustment gain amount of each carrier may be determined, and when each carrier is scaled, the power adjustment of each carrier is performed according to the baseband power adjustment gain amount, The object of the invention can be achieved. Those skilled in the art will appreciate that this is the same as the principles disclosed in step 201.
- Step 202 Perform calibration adjustment on the baseband power of each carrier according to the baseband gain adjustment coefficient, and use the product of the baseband gain adjustment coefficient and the current baseband power of each carrier as the to-be-adjusted power of each carrier.
- the current baseband carrier power of each carrier is integrated with the baseband gain adjustment coefficient of the carrier, that is, the baseband power to be adjusted of the carrier, and the baseband power adjustment in the multi-carrier system is adopted.
- the unit adjusts the carrier baseband power to the baseband power to be adjusted. Since the baseband power adjustment of each carrier is performed simultaneously, the total baseband power of each carrier input to the up-conversion unit is constant. Therefore, the peak clipping and digital predistortion processing in the multi-carrier system are kept constant for the input baseband power, the signal-to-noise ratio of the downlink signal is improved, and the performance of the multi-carrier system is ensured.
- Step 203 Set a reference carrier, measure a transmit power of the reference carrier of the antenna port, and determine a transmit power calibration adjustment amount of the reference carrier according to an antenna port target power of the reference carrier, where each carrier is according to the reference carrier.
- the transmit power calibration adjustment amount is used to adjust the transmit power calibration.
- a multi-carrier system has a corresponding processing unit that specifically measures the carrier transmit power of the antenna port, and the measurement result of the reference carrier of the processing unit can be read.
- the target power of each antenna is determined when the system is designed, and is stored in the multi-carrier system. In the system, you can call it when you need it.
- the transmit power calibration adjustment amount is determined, and the transmit power calibration adjustment amount is used as the transmit power calibration adjustment amount of each carrier in the system. That is to say, the radio frequency calibration of each carrier in step 203 is performed simultaneously, and the adjusted powers are the same.
- the total transmit power of the antenna port is measured to see if the total power calibration convergence requirement is met.
- the calibration is successful, the calibration is successful, otherwise the calibration fails.
- step 203 is performed by the radio frequency link digital control attenuator, and the step 202 is the baseband power adjustment performed by the baseband power adjustment unit of each baseband carrier.
- step 203 is an additional step of the method of power scaling in the multi-carrier system of the present invention and is not a necessary step to achieve the objectives of the invention.
- a system for power calibration in a multi-carrier system includes a gain difference determining unit 30 and a target power.
- the gain difference determining unit 30 determines the gain difference, refer to the related description of step 201, and details are not described herein again.
- the target power acquiring unit 31 is configured to acquire the antenna port target power of each carrier, and the antenna port target power is set by the multi-carrier system and stored in a specific storage address, and the target power acquiring unit 31 is set to point to the storage address pointer.
- the baseband gain adjustment coefficient determining unit 32 is configured to determine the baseband gain adjustment coefficient of each carrier according to the gain difference and the baseband target power of each carrier. For the manner of determining, refer to the related description in step 201, and details are not described herein again.
- the baseband carrier power scaling unit 33 is configured to perform baseband power adjustment on each carrier according to the baseband gain adjustment coefficient, and the product of the gain adjustment coefficient and the current power of the carrier is used as the to-be-adjusted power of the carrier.
- the system for power calibration in the multi-carrier system of the embodiment of the present invention further includes a reference carrier transmit power measuring unit 34 and a transmit power scaling unit 35, wherein the reference carrier transmit power measuring unit 34 is configured to measure the antenna.
- the transmit power of the reference carrier is set by the port, and the reference carrier may be any one of the system carriers.
- the transmit power scaling unit 35 is configured to determine a transmit power calibration adjustment amount of the reference carrier according to a target power of the reference carrier, and each carrier performs a transmit power calibration adjustment according to a transmit power calibration adjustment amount of the reference carrier.
- the target power of the reference carrier can pass the target power
- the rate acquisition unit 31 acquires.
- the reference carrier transmit power measuring unit 34 and the transmit power scaling unit 35 are technical means for optimally selecting the system of the present invention, and are not essential technical means for achieving the object of the invention.
- the power calibration system in the multi-carrier system of the embodiment of the present invention is designed to implement the power calibration method in the foregoing multi-carrier system, and the implementation functions of each processing unit in the system can be referred to FIG. 2 It is understood from the related description in the method shown that the functions of the above units can be realized by a software program running on a processor, or can be realized by a specific logic circuit.
- the present invention first determines a gain difference between each baseband carrier RF channel, determines a baseband gain adjustment coefficient of each carrier according to a difference in gain and a target power of each carrier, and performs baseband power for each carrier according to the baseband gain adjustment coefficient. Calibration adjustment; then set the reference carrier of the RF power calibration, adjust the RF link gain according to the reference carrier, so that the reference carrier antenna port power meets the calibration power requirement of the carrier, when the reference carrier satisfies the calibration power requirement of the carrier When the power of the remaining carriers also meets the calibration power requirement, it is also necessary to check whether the total power of the antenna port meets the total power convergence requirement.
- the total baseband power is guaranteed to be constant, thereby satisfying the requirement that the peak clipping and digital predistortion processing in the multi-carrier system keep the input baseband total power constant, and improve the downlink signal.
- the signal-to-noise ratio ensures the performance of the multi-carrier system.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transmitters (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
本发明公开了一种多载波系统中功率定标的方法和系统。本发明方案为：首先确定出各基带载波射频通道之间的增益差异，获取各载波的基带目标功率，由此确定各载波的基带增益调整系数，根据所述基带增益调整系数对各载波基带功率进行定标调整；再设置基准载波，测量天线口基准载波的发射 功率，根据基准载波的目标功率确定基准载波的发射功率定标调整量，各载波按基准载波的发射功率定标调整量进行发射功率定标调整。在满足各载波的发射功率接近目标功率的同时，保证了基带总功率的恒定，从而满足了多载波系统中削峰、数字预失真处理对于输入基带总功率保持恒定的要求，提高了下行信号的信噪比，保证了多载波系统的性能。
Description
多载波系统中功率定标的方法与系统 技术领域
本发明涉及一种载波定标方法与系统， 尤其涉及一种多载波系统中功率 定标的方法与系统。
背景技术
在无线通讯系统中， 前向发射功率决定了系统的前向覆盖范围， 但前向 覆盖范围也会受到反向覆盖范围的限制。 例如， 系统的前向覆盖范围过大时， 用户终端虽然能接收到基站的发射信号， 但超出小区范围的用户终端却并不 能接入到无线通讯系统中； 同时在蜂窝通讯系统中， 如果前向覆盖范围过大， 超过了预先网络规划所设计要求的范围， 会造成相邻小区间的干扰， 导致通 讯系统的容量下降。 由此可见， 前向发射功率是保证无线通讯网络覆盖、 容 量及性能的一个重要指标。 因此在多载波无线通讯系统中， 需要对每一个载 波的发射功率进行定标。
载波功率定标的目的是使多载波无线通讯系统的发射载波功率达到预先 设定的目标值要求， 同时出于保护无线通讯系统中功率放大器的考虑， 多个 载波的输出功率总和必须小于功率放大器的最大输出功率阔值， 所以系统在 进行功率定标时， 需要同时支持载波功率的测量和总功率的测量。
图 1为多载波系统中载波调制的结构示意图， 如图 1所示， 多载波系统 中的各个载波的基带信号经过基带增益调整单元进行基带功率增益调整后， 再通过上变频处理单元进行频率调制， 使基带信号承载在高频信号上， 高频 信号经过功率放大器的功率放大后， 通过连接在双工器上的天线发射出去。
现有的载波功率定标方法是先通过检测天线口发射信号的总功率， 通过 调整射频链路的增益满足发射信号总功率的要求。 然后固定射频链路的增益 依次检测各载波的发射功率， 将每载波的发射功率与预先设定的目标值进行 比较， 然后调整基带信号增益单元的增益， 天线口处检测到的各载波发射功 率满足载波发射功率设定目标值。
现有的定标方法先进行总功率定标然后再微调每载波的基带功率， 在定 标调整过程中， 会使得输出给系统中数模转换器的基带总功率发生波动， 这 种基带总功率的变动不满足多载波系统中削峰、 数字预失真处理对于输入基 带功率保持恒定的要求， 对系统的无线性能指标如码域功率、 邻道功率抑制 比等也会有所影响。 定标调整结束后将严重影响多载波系统的无线性能。
发明内容
有鉴于此， 本发明的主要目的在于提供一种多载波系统中功率定标的方 法与系统， 能在定标调整过程中保持各个载波的基带功率总和恒定， 充分利 用数模转换器的动态范围， 提高了系统下行信号的输出性能。
为达到上述目的， 本发明的技术方案是这样实现的：
一种多载波系统中功率定标的方法， 包括：
确定各载波射频通道之间的增益差异， 获取各载波的基带目标功率， 根 据所述增益差异及各载波的天线口目标功率确定各载波的基带增益调整系 数； 以及
根据所述基带增益调整系数对各载波基带功率进行定标调整。
优选地， 所述对各载波基带功率进行定标调整， 具体为：
将所述基带增益调整系数与各载波当前基带功率之积作为各载波的待调 整功率。
优选地， 所述确定各载波射频通道之间的增益差异， 具体为：
在相同条件下测量天线口的每个载波的发射功率， 根据配置的天线口目 标功率及测试得到天线口功率确定其中一载波作为基准载波， 各载波与所述 基准载波的发射功率作差， 差值即为增益差异。
优选地， 所述相同条件为： 载波基带功率相同、 载波的基带增益调整系 数相同、 载波的射频链路增益调整控制字相同。
优选地， 对各载波基带功率进行定标调整之后， 该方法还包括： 设置一基准载波， 测量天线口所述基准载波的发射功率， 根据所述基准
载波的天线口目标功率确定所述基准载波的发射功率定标调整量， 各载波按 所述基准载波的发射功率定标调整量进行发射功率定标调整。
一种多载波系统中功率定标的系统， 包括：
增益差异确定单元， 其设置为确定各载波射频通道之间的增益差异； 目标功率获取单元， 其设置为获取各载波的天线口目标功率；
基带增益调整系数确定单元， 其设置为根据所述增益差异及各载波的基 带目标功率确定各载波的基带增益调整系数； 以及 基带载波功率定标单元， 其设置为根据所述基带增益调整系数对各载波 基带功率进行定标调整。
优选地， 所述基带载波功率定标单元对各载波基带功率进行定标调整， 具体为： 将所述基带增益调整系数与各载波当前基带功率之积作为各载波的 待调整功率。
优选地， 所述增益差异确定单元确定各载波射频通道之间的增益差异， 具体为：
在相同条件下测量天线口的每个载波的发射功率， 根据配置的目标功率 及测试得到天线口功率确定其中一载波作为基准载波， 各载波与所述基准载 波的发射功率作差， 差值即为增益差异。
优选地， 所述相同条件为： 基带载波功率相同、 载波的基带增益调整系 数相同、 载波的射频链路增益调整控制字相同。
优选地， 该系统还包括：
基准载波发射功率测量单元， 用于测量天线口所设置基准载波的发射功 率； 以及
发射功率定标单元， 用于根据所述基准载波的天线口目标功率确定所述 基准载波的发射功率定标调整量， 各载波按所述基准载波的发射功率定标调 整量进行发射功率定标调整。
本发明首先确定出各基带载波射频通道之间的增益差异， 根据增益差异 及各载波的目标功率确定各载波的基带增益调整系数， 根据所述基带增益调
整系数对各载波基带功率进行定标调整； 再设置射频功率定标的基准载波， 根据基准载波进行射频链路增益调整， 使基准载波天线口功率满足该载波的 定标功率要求， 当基准载波满足该载波的定标功率要求时其余载波的功率也 满足了定标功率要求，同时需要检查天线口总功率是否满足总功率收敛要求。 在满足各载波的发射功率接近目标功率的同时， 保证了基带总功率的恒定， 从而满足了多载波系统中削峰、 数字预失真处理对于输入基带总功率保持恒 定的要求， 提高了下行信号的信噪比， 保证了多载波系统的性能。
附图概述
图 1为多载波系统中载波调制的结构示意图；
图 2为本发明实施例的多载波系统中功率定标的方法的流程示意图； 图 3为本发明实施例的多载波系统中功率定标的系统的结构示意图。
本发明的较佳实施方式
本发明的基本思想是：首先确定出各基带载波射频通道之间的增益差异， 再获取各载波的天线口目标功率， 根据增益差异及各载波的天线口目标功率 确定各载波的基带增益调整系数， 根据所述基带增益调整系数对各载波基带 功率进行定标调整； 再设置射频功率定标的基准载波， 根据基准载波进行射 频链路增益调整， 使基准载波天线口功率满足该载波的定标功率要求， 当基 准载波满足该载波的定标功率要求时其余载波的功率也满足了定标功率要 求， 同时需要检查天线口总功率是否满足总功率收敛要求。 在满足各载波的 发射功率接近目标功率的同时， 保证了基带总功率的恒定， 从而满足了多载 波系统中削峰、 数字预失真处理对于输入基带总功率保持恒定的要求， 提高 了下行信号的信噪比， 保证了多载波系统的性能。
为使本发明的目的、 技术方案和优点更加清楚明白， 以下举实施例并参 照附图， 对本发明进一步详细说明。
图 2为本发明实施例的多载波系统中功率定标的方法的流程示意图， 如 图 2所示， 本发明实施例的多载波系统中功率定标的方法包括以下步骤：
步骤 201 : 确定各载波射频通道之间的增益差异， 获取各载波的天线口 目标功率， 根据所述增益差异及各载波的基带目标功率确定各载波的基带增 益调整系数。
在相同条件下测试出每个载波天线口发射功率的差异， 即计算出各载波 之间链路的增益差异 。 相同条件即载波基带功率相同、 基带增益调整系 数相同、 载波的射频链路增益调整控制字相同也即载波间每次的增益调整量 都是相同的。 以多载波系统中载波配置了 n个载波 ;至 /„为例进行说明。 并 以载波 ;为基准载波， 则载波间的增益差异（单位为 dB ) 由 ;至 依次为：
Χ = Gainf - Gainf = 0
X2 = Gainf2 - Gain
Xn = Gainfn - Gainfl 通过查询系统的配置信息确定每个载波的目标功率， 即确定系统中各载 波天线口处的发射目标功率， 4叚设载波 ;至 fn所对应的目标功率分别为 至 Pn。 各个载波增益调整系数的比率为 R:
^ = ^ χ10(ρ"-¾- ")/20
这里，公式中，之所以将功率 Ρ与 G∞«之差值作为 10的指数， 是因为功 率是以 dBm为单位的， 计算载波功率时已经取了以 10为底的对数， 而将 20 作为 P与 Gain之差值的分母， 是在计算载波功率时有平方的运算。
载波 _；至 /„的增益调整系数依次为：
K2 = R2 xK]
Kn = Rn xK、
其中， ^是默认值， 其根据多载波系统的削峰能力， 在模数转换器
( DAC )满量程的基础上回退一定的峰均比得到， 与系统信号峰均比及 DAC 的满量程位宽有关， 该^^ ft确保了基带总功率不变。 这里， K作为定标过程 中各载波的功率增益调整的系数， 也就是说， 每次基带增益调整时， 将各载 波的系数 K与该载波的当前基带功率作积， 即为该基带载波的待调整功率。
本发明中， 计算出各载波的系数 K后， 也可以确定出各载波的基带功率 调整增益量， 对各载波进行定标时根据所述的基带功率调整增益量对各载波 进行功率调整，也可实现发明目的。本领域技术人员应当理解， 这与步骤 201 所揭示的原理是相同的。
步骤 202: 根据所述基带增益调整系数对各载波基带功率进行定标调整， 将所述基带增益调整系数与各载波当前基带功率之积作为各载波的待调整功 率。
在得到各载波的基带增益调整系数之后， 将每个载波的当前基带载波功 率与该载波的基带增益调整系数作积， 即为该载波的待调整基带功率， 通过 多载波系统中的基带功率调整单元将载波基带功率调整为待调整的基带功 率。 由于每个载波的基带功率调整都是同时进行的， 因此， 输入到上变频单 元的各载波的基带总功率是恒定的。 从而满足了多载波系统中削峰、 数字预 失真处理对于输入基带功率的保持恒定的要求， 提高了下行信号的信噪比， 保证了多载波系统的性能。 步骤 203: 设置一基准载波， 测量天线口所述基准载波的发射功率， 根 据所述基准载波的天线口目标功率确定所述基准载波的发射功率定标调整 量， 各载波按所述基准载波的发射功率定标调整量进行发射功率定标调整。
在系统载波中选择任意一个作为基准载波， 测量天线口所述基准载波的 发射功率。 本领域技术人员应当理解， 多载波系统中有专门测量天线口的载 波发射功率的相应处理单元， 读取该处理单元的基准载波的测量结果即可。 而各载波的天线口目标功率是系统设计时即确定的， 存储于所述的多载波系
统中， 需要的时候调用即可。 根据基准载波的天线口的实际发射功率及目标 发射功率， 确定发射功率定标调整量， 该发射功率定标调整量作为系统中各 个载波的发射功率定标调整量。 也就说， 步骤 203中各载波的射频定标是同 时进行的， 所调整的功率是相同的。
各载波进行射频定标调整之后， 测量天线口的发射总功率， 看是否满足 总功率定标收敛的要求， 满足时定标成功， 否则定标失败。
需要说明的是， 步骤 203中的功率调整是通过射频链路数控衰减器来进 行调整的， 而步骤 202则是针对的每个基带载波的基带功率调整单元进行的 基带功率调整。 本领域技术人员应当理解， 步骤 203是本发明多载波系统中 功率定标的方法的附加步骤， 并非是实现发明目的的必要步骤。
图 3为本发明实施例的多载波系统中功率定标的系统的结构示意图， 如 图 3所示， 本发明实施例的多载波系统中功率定标的系统包括增益差异确定 单元 30、 目标功率获取单元 31、 基带增益调整系数确定单元 32和载波基带 功率定标单元 33 , 其中， 增益差异确定单元 30用于确定各载波射频通道之 间的增益差异。增益差异确定单元 30确定增益差异的方式参见步骤 201的相 关描述， 这里不再赘述。 目标功率获取单元 31用于获取各载波的天线口目标 功率， 天线口目标功率由多载波系统设定而存储在某个特定的存储地址中， 设置目标功率获取单元 31指向存储地址的指针即可获取。基带增益调整系数 确定单元 32 用于根据所述增益差异及各载波的基带目标功率确定各载波的 基带增益调整系数， 确定的方式参见步骤 201的相关描述， 这里不再赘述。 基带载波功率定标单元 33 用于根据所述基带增益调整系数对各载波进行基 带功率调整， 所述增益调整系数与该载波当前功率之积作为该载波的待调整 功率。
如图 3所示， 本发明实施例的多载波系统中功率定标的系统还包括基准 载波发射功率测量单元 34、 发射功率定标单元 35 , 其中， 基准载波发射功率 测量单元 34用于测量天线口所设置基准载波的发射功率，基准载波可以是系 统载波中的任意一个。发射功率定标单元 35用于根据所述基准载波的目标功 率确定所述基准载波的发射功率定标调整量， 各载波按所述基准载波的发射 功率定标调整量进行发射功率定标调整。 基准载波的目标功率可通过目标功
率获取单元 31获取。 基准载波发射功率测量单元 34及发射功率定标单元 35 是为使本发明系统最优所选用的技术手段， 并非是实现发明目的的必要技术 手段。
本领域技术人员应当理解， 本发明实施例的多载波系统中功率定标的系 统是实现前述多载波系统中功率定标方法而设计的， 系统中的各处理单元的 实现功能可参照图 2所示的方法中的相关描述而理解， 上述各单元的功能可 通过运行于处理器上的软件程序而实现， 也可通过具体的逻辑电路而实现。
以上所述， 仅为本发明的较佳实施例而已， 并非用于限定本发明的保护 范围。
工业实用性 本发明首先确定出各基带载波射频通道之间的增益差异， 根据增益差异 及各载波的目标功率确定各载波的基带增益调整系数， 根据所述基带增益调 整系数对各载波基带功率进行定标调整； 再设置射频功率定标的基准载波， 根据基准载波进行射频链路增益调整， 使基准载波天线口功率满足该载波的 定标功率要求， 当基准载波满足该载波的定标功率要求时其余载波的功率也 满足了定标功率要求，同时需要检查天线口总功率是否满足总功率收敛要求。 在满足各载波的发射功率接近目标功率的同时， 保证了基带总功率的恒定， 从而满足了多载波系统中削峰、 数字预失真处理对于输入基带总功率保持恒 定的要求， 提高了下行信号的信噪比， 保证了多载波系统的性能。
Claims
1、 一种多载波系统中功率定标的方法， 包括：
确定各载波射频通道之间的增益差异， 获取各载波的基带目标功率， 根 据所述增益差异及各载波的基带目标功率确定各载波的基带增益调整系数； 以及
根据所述基带增益调整系数对各载波基带功率进行定标调整。
2、 根据权利要求 1所述的方法， 其中， 所述对各载波基带功率进行定标 调整的步骤为：
将所述基带增益调整系数与各载波当前基带功率之积作为各载波的待调 整功率。
3、 根据权利要求 1所述的方法， 其中， 所述确定各载波射频通道之间的 增益差异的步骤包括：
在相同条件下测量每个载波的天线口功率， 根据配置的天线口目标功率 及测试得到的天线口功率确定其中一载波作为基准载波， 各载波与所述基准 载波的发射功率作差， 差值即为增益差异。
4、 根据权利要求 3所述的方法， 其中， 所述相同条件为： 载波基带功率 相同、 载波的基带增益调整系数相同、 载波的射频链路增益调整控制字相同。
5、根据权利要求 1所述的方法， 在对各载波基带功率进行定标调整的步 骤之后， 还包括：
设置一基准载波， 测量天线口所述基准载波的发射功率， 根据所述基准 载波的目标功率确定所述基准载波的发射功率定标调整量， 各载波按所述基 准载波的发射功率定标调整量进行发射功率定标调整。
6、 一种多载波系统中功率定标的系统， 包括：
增益差异确定单元， 其设置为确定各载波射频通道之间的增益差异； 目标功率获取单元， 其设置为获取各载波的天线口目标功率；
基带增益调整系数确定单元， 其设置为根据所述增益差异及各载波的天 线口目标功率确定各载波的基带增益调整系数； 以及
基带载波功率定标单元， 其设置为根据所述基带增益调整系数对各载波 基带功率进行定标调整。
7、 根据权利要求 6所述的系统， 其中， 所述基带载波功率定标单元还设 置为将所述基带增益调整系数与各载波当前基带功率之积作为各载波的待调 整功率。
8、根据权利要求 6所述的系统，其中，所述增益差异确定单元还设置为： 在相同条件下测量天线口的每个载波的发射功率， 根据配置的天线口目 标功率及测试得到天线口功率确定其中一载波作为基准载波， 各载波与所述 基准载波的发射功率作差， 差值即为增益差异。
9、 根据权利要求 8所述的系统， 其中， 所述相同条件为： 基带载波功率 相同、 载波的基带增益调整系数相同、 载波的射频链路增益调整控制字相同。
10、 根据权利要求 8所述的系统， 还包括：
基准载波发射功率测量单元， 其设置为测量天线口的所述基准载波的发 射功率； 以及
发射功率定标单元， 其设置为根据所述基准载波的目标功率确定所述基 准载波的发射功率定标调整量， 各载波按所述基准载波的发射功率定标调整 量进行发射功率定标调整。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810239852.0 | 2008-12-19 | ||
| CN2008102398520A CN101437281B (zh) | 2008-12-19 | 2008-12-19 | 多载波系统中功率定标的方法与系统 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2010069203A1 true WO2010069203A1 (zh) | 2010-06-24 |
Family
ID=40711451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2009/074574 WO2010069203A1 (zh) | 2008-12-19 | 2009-10-23 | 多载波系统中功率定标的方法与系统 |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101437281B (zh) |
| WO (1) | WO2010069203A1 (zh) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115372801A (zh) * | 2022-10-24 | 2022-11-22 | 四川恒湾科技有限公司 | 一种基站射频单元功率放大器的校准方法及系统 |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101437281B (zh) * | 2008-12-19 | 2010-12-29 | 中兴通讯股份有限公司 | 多载波系统中功率定标的方法与系统 |
| CN103634890B (zh) * | 2012-08-20 | 2017-03-08 | 京信通信系统（中国）有限公司 | Dpd功放产品功率定标方法和装置 |
| CN103906143A (zh) * | 2012-12-28 | 2014-07-02 | 中兴通讯股份有限公司 | 一种多载波系统定标的实现方法和装置 |
| CN105517138A (zh) * | 2014-10-17 | 2016-04-20 | 中兴通讯股份有限公司 | 一种调整增益的方法和装置 |
| CN105142173B (zh) | 2015-08-27 | 2018-10-12 | 华为技术有限公司 | 一种信号输出装置、板卡和方法 |
| CN108462539A (zh) * | 2018-02-09 | 2018-08-28 | 海能达通信股份有限公司 | 通信终端的抗干扰装置、方法、通信终端及存储介质 |
| CN111398678B (zh) * | 2020-04-22 | 2022-04-05 | 航天恒星科技有限公司 | 星载相控阵天线载波串扰抑制指标的测试方法及装置 |
| CN111654336B (zh) * | 2020-06-01 | 2022-08-16 | 展讯通信（上海）有限公司 | 发射功率确定方法、装置及设备 |
| CN111818627B (zh) * | 2020-07-24 | 2022-07-08 | 成都爱瑞无线科技有限公司 | 一种动态调整的下行发端定标方法 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6304749B1 (en) * | 1998-04-17 | 2001-10-16 | Matsushita Electric Industrial Co., Ltd. | Radio equipment and transmit power controlling method for the same |
| CN1346218A (zh) * | 2000-09-26 | 2002-04-24 | 华为技术有限公司 | 一种提高宽带多载波基站载波输出功率的方法及其装置 |
| CN1352511A (zh) * | 2000-11-14 | 2002-06-05 | 华为技术有限公司 | 一种基于宽带多载波基站的增益均衡方法和装置 |
| CN101136895A (zh) * | 2007-03-14 | 2008-03-05 | 中兴通讯股份有限公司 | 多载波系统中基于实例进程的自动定标方法 |
| CN101437281A (zh) * | 2008-12-19 | 2009-05-20 | 中兴通讯股份有限公司 | 多载波系统中功率定标的方法与系统 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100474311B1 (ko) * | 2002-12-05 | 2005-03-10 | 엘지전자 주식회사 | 멀티캐리어 송신기의 출력레벨 조정회로 및 방법 |
-
2008
- 2008-12-19 CN CN2008102398520A patent/CN101437281B/zh active Active
-
2009
- 2009-10-23 WO PCT/CN2009/074574 patent/WO2010069203A1/zh active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6304749B1 (en) * | 1998-04-17 | 2001-10-16 | Matsushita Electric Industrial Co., Ltd. | Radio equipment and transmit power controlling method for the same |
| CN1346218A (zh) * | 2000-09-26 | 2002-04-24 | 华为技术有限公司 | 一种提高宽带多载波基站载波输出功率的方法及其装置 |
| CN1352511A (zh) * | 2000-11-14 | 2002-06-05 | 华为技术有限公司 | 一种基于宽带多载波基站的增益均衡方法和装置 |
| CN101136895A (zh) * | 2007-03-14 | 2008-03-05 | 中兴通讯股份有限公司 | 多载波系统中基于实例进程的自动定标方法 |
| CN101437281A (zh) * | 2008-12-19 | 2009-05-20 | 中兴通讯股份有限公司 | 多载波系统中功率定标的方法与系统 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115372801A (zh) * | 2022-10-24 | 2022-11-22 | 四川恒湾科技有限公司 | 一种基站射频单元功率放大器的校准方法及系统 |
| CN115372801B (zh) * | 2022-10-24 | 2023-01-17 | 四川恒湾科技有限公司 | 一种基站射频单元功率放大器的校准方法及系统 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101437281B (zh) | 2010-12-29 |
| CN101437281A (zh) | 2009-05-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2010069203A1 (zh) | 多载波系统中功率定标的方法与系统 | |
| EP2086269B1 (en) | A transmit power controller | |
| US7760681B1 (en) | Transmit power adaptation algorithm using 802.11H | |
| KR101201202B1 (ko) | 무선 통신 시스템에서 무선 신호 송/수신 장치 | |
| CN101170331B (zh) | 多载波无线通讯系统载波发射功率的定标方法和装置 | |
| EP2550735B1 (en) | Methods for determining optimum power supply voltages for radio-frequency power amplifier circuitry | |
| US20050159116A1 (en) | Method of self-calibration in a wireless transmitter | |
| US8638837B2 (en) | Radio communication apparatus | |
| CN1280721A (zh) | 接收信号强度确定方法和系统 | |
| US9241336B2 (en) | Communication terminal device and method, base station device, and communication system | |
| US8787859B2 (en) | Automatic gain control apparatus and method | |
| CN106877946A (zh) | 一种高性能信道模拟器自动控制接收机及其验证装置 | |
| CN109951244B (zh) | 一种应用于信道模拟器的功率测量及射频接收增益控制方法 | |
| KR101921494B1 (ko) | 무선 통신 시스템에서 안테나 임피던스 매칭 장치 및 방법 | |
| JP4386942B2 (ja) | 受信信号強度の推定 | |
| US7593699B2 (en) | Distortion/efficiency adaptation in a variable-data-rate radio transmitter | |
| CN101682341B (zh) | 增加无线电接收器的灵敏度 | |
| CN101895512A (zh) | 对射频发射机进行增益校准的方法以及一种射频发射机 | |
| JP2010154017A (ja) | 送信増幅器 | |
| CN117318846A (zh) | 功率定标方法、无线通信设备及存储介质 | |
| JP5454014B2 (ja) | 無線装置および送信特性補正方法 | |
| US9467951B2 (en) | Uplink transmit power control | |
| US8831527B2 (en) | Method and device for measuring the antenna diversity gain in digital radio transmission systems |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 09832885 Country of ref document: EP Kind code of ref document: A1 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 09832885 Country of ref document: EP Kind code of ref document: A1 |