WO2011070460A1 - Appareil et procédé de calcul de métrique cubique dans une porteuse double, et système de communication sans fil à porteuses multiples - Google Patents

Appareil et procédé de calcul de métrique cubique dans une porteuse double, et système de communication sans fil à porteuses multiples Download PDF

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Publication number
WO2011070460A1
WO2011070460A1 PCT/IB2010/055235 IB2010055235W WO2011070460A1 WO 2011070460 A1 WO2011070460 A1 WO 2011070460A1 IB 2010055235 W IB2010055235 W IB 2010055235W WO 2011070460 A1 WO2011070460 A1 WO 2011070460A1
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WIPO (PCT)
Prior art keywords
carrier
gain values
carriers
sets
code
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Application number
PCT/IB2010/055235
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English (en)
Inventor
Teemu Sipila
Ville Riekkinen
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Nokia Corporation
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Filing date
Publication date
Application filed by Nokia Corporation filed Critical Nokia Corporation
Priority to US13/511,354 priority Critical patent/US8811216B2/en
Priority to CN201080056087.4A priority patent/CN102652416B/zh
Priority to EP10835574.4A priority patent/EP2510658B1/fr
Publication of WO2011070460A1 publication Critical patent/WO2011070460A1/fr

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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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
    • H04W52/346—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading distributing total power among users or channels
    • 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
    • H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
    • H03G3/3042—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers
    • 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
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control
    • 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
    • H04W52/06—TPC algorithms
    • H04W52/16—Deriving transmission power values from another channel
    • 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
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range

Definitions

  • the present application relates generally to an apparatus and a method for cubic metric computation in dual-carrier and multi-carrier wireless communication system.
  • High speed packet access is one of such collection of wireless communication protocols that extends and improves the performance of existing UMTS (universal mobile telecommunications system) protocols and is specified by different releases of the standard by the 3 generation partnership project (3GPP) in the area of mobile network technology.
  • 3GPP 3 generation partnership project
  • the other non-limiting example wireless communication protocols are long term evolution (LTE), global system for mobile (GSM) and worldwide interoperability for microwave access (WiMAX).
  • Carrier aggregation technology has drawn considerable attention in, e.g., HSPA and LTE.
  • dual-carrier HSDPA high speed downlink packet access
  • dual-carrier HSPA may be used where a MAC (medium access control) scheduler may allocate two HSPA carriers in parallel and double the communication bandwidth. Besides the throughput gain from double the bandwidth, some diversity and joint scheduling gains may also be expected. This can particularly improve the quality of service (QoS) for end users in poor environment conditions that cannot be gained from other techniques. Similar idea is under consideration in the enhanced LTE technology called LTE-Advanced. Via this technology LTE is expected to improve end-user throughput, increase sector capacity, reduce user plane latency, and consequently offer superior user experience with full mobility.
  • LTE-Advanced Similar idea is under consideration in the enhanced LTE technology called LTE-Advanced. Via this technology LTE is expected to improve end-user throughput, increase sector capacity, reduce user plane latency, and consequently offer superior user experience with full mobility.
  • DC-HSUPA dual-cell high speed uplink packet access
  • the UE may be assigned one or two adjacent uplink carriers for data transmission if the UE is dual carrier capable.
  • the UE is power limited and thus it needs to share its transmission power among the carriers if it transmits on both carriers simultaneously.
  • a method may include receiving at least two sets of gain values, wherein each set of gain values denotes the gains of a set of code channels that are carried by each of at least two carriers,
  • an apparatus may include at least one processor, and at least one memory including computer program code, wherein the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to perform receiving at least two sets of gain values, wherein each set of gain values denotes the gains of a set of code channels that are carried by each of at least two carriers, receiving at least two power or amplitude levels that are allocated to the at least two carriers, and calculating a cubic metric based on the received at least two sets of gain values and the received at least two power or amplitude levels.
  • a computer program product comprising a computer-readable medium bearing computer program code embodied therein for use with a computer
  • the computer program code may include code for receiving at least two sets of gain values, wherein each set of gain values denotes the gains of a set of code channels that are carried by each of at least two carriers,
  • an apparatus may include a means for receiving at least two sets of gain values, wherein each set of gain values denotes the gains of a set of code channels that are carried by each of at least two carriers, and receiving at least two power or amplitude levels that are allocated to the at least two carriers.
  • the apparatus may also include a means for calculating a cubic metric based on the received at least two sets of gain values and the received at least two power or amplitude levels.
  • Figure 1 illustrates an example wirelss system
  • Figure 2 shows an example RF-IC (radio frequency integrated circuit) for weighting the signals of two carriers to achieve requested power levels
  • Figure 3 shows an example BB-IC (baseband integrated circuit) and an example RF-IC that are suitable for cubic metric computation in accordance with an example embodiment of the invention
  • Figure 4 shows a simplied block diagram of an electronic apparatus in accordance with an example embodiment of the invention.
  • FIG. 1 depicts an example wireless system 100.
  • Wireless system 100 comprises a
  • UEs user equipments
  • the wireless system 100 may comprise more Node Bs and more or less UEs.
  • the Node B 101 possibly together with other Node Bs and one or more radio network controllers, comprises the UMTS terrestrial radio access network (UTRAN).
  • UTRAN UMTS terrestrial radio access network
  • the Node B 101 communicates with the UEs 103, 105 and 107 via bidirectional communication channels or links 102, 104 and 106, respectively.
  • the Node B 101 may allocate a communication carrier to each UE, e.g., UE 105 and 107.
  • the Node B 101 may allocate a plurality of communication carriers to a UE, e.g., UE 103.
  • the increase in the number of allocated communication carriers may correlate with an increase in communication bandwidth.
  • a throughput gain from the increase in the bandwidth allocated to a UE may be expected.
  • the increased bandwidth, due to the plurality of communication carriers may allow for some diversity and joint scheduling gains.
  • the UE 103 may comprise a BB-IC (baseband integrated circuit) and a RF-IC (radio frequency integrated circuit).
  • the UE 103 For uplink communication, the UE 103 generates in baseband the information signal to be transmitted.
  • the BB-IC e.g., the block 320 in Figure 3, which will be described in detail hereinafter, scales the signal to a constant power before it sends the signal to the RF-IC, e.g., the block 200 in Figure 2 and the block 300 in Figure 3, which will be described in detail hereinafter.
  • the resultant analog signal is low-pass filtered and modulated by the carrier frequency.
  • the power amplifier (PA) raises the power of the signal to a requested level.
  • the power level may be requested by the BB-IC.
  • PA circuits the primary cause of adjacent channel leakage is the third order nonlinearity of the amplifier gain characteristic.
  • the RF-IC computes a cubic metric (CM) in order to assess how much the incoming signal would cause the third order non-linearity distortion in the power amplifier.
  • the calculation of the CM is based on beta-values (gain values) delivered by the BB-IC.
  • CM complementary metal-oxide-semiconductor
  • 3GPP TS 25.101 Chapter 6.2.2. sets the requirements for the CM. How the CM is actually computed or estimated is vendor dependent, but the methods have to be based directly or indirectly on the beta-values.
  • the beta-values in their current form can not any more be used as such to compute the CM, because these beta- values are not commensurate between different carriers. In an example embodiment, these beta-values do not have the same amplitude.
  • the baseband signals of both or all carriers arrive at the RF-IC side with about constant and equal power levels due the scaling performed by the BB-IC.
  • the RF-IC does not have knowledge on what kind of scaling has been applied to the signals by the BB-IC.
  • the RF-IC only knows what the signal power levels of the different carriers should be after the power amplification. It also knows what beta-values the BB-IC has delivered.
  • the RF-IC applies an adjustment to the beta-values before they are used to compute the CM.
  • the adjustment that the RF-IC applies to the beta-values before they are used to compute the CM is derived and explained in detail as follows.
  • the desired behavior of a power amplifier is to amplify the input voltage v, (t) by a linear gain G 1 .
  • G 1 the input voltage
  • the third order term G 3 (v ; (f)) 3 is in practice completely determined by (v ; (f)) 3 , which in turn is completely determined by the input signal v t (t) .
  • the 3GPP specifications set the requirements to calculate the cubic metric, which requires the estimation or calculation of (v ; (f)) 3 .
  • CM To calculate CM, the input voltage signal v t (t) is normalised to root mean square (rms) value 1.0 and then cubed. The result is then converted to decibels and scaled. However, the variable that is estimated or measured to calculate the cubic metric is (v ; (f)) 3 .
  • CM CEIL ⁇ [20 * log 10 ((v_norm 3 ) ms ) - 20 * log 10 ((v_norm_ref 3 ) rms )] / k, 0.5 ⁇
  • CEIL ⁇ x, 0.5 ⁇ means rounding upwards to closest 0.5dB
  • v_norm and v_norm_ref are the normalized voltage waveforms of the input signal and the reference signals, respectively, and 20 * loglO ((v_norm_ref 3 ) rms ) and k are constants.
  • CM is a function of v_norm 3 .
  • the v_norm 3 in Equation (2) represents the same signal as (v ; (f)) 3 in Equation (1), when the rms power of v t (t) is 1.0.
  • the rms power of v t (t) is assumed to be equal to 1.0 without loss of any generality. That can be assumed because any arbitrary amplitude can be given to the output signal by the amplifier by changing G 1 in Equation (1).
  • the CM is estimated by the RF-IC.
  • the input information that is used for estimating the CM in single carrier HSUPA is the beta-values, e.g., the gain values of all the code channels. These beta-values are passed to the RF-IC by the BB-IC.
  • the beta- values of this carrier are denoted by ⁇ 1 , ⁇ 2 , ..., ? L , where L is the number of code channels of the carrier. Therefore, the cubic metric for single carrier signal is a function of ⁇ 1 , ⁇ 2 , ..., L , expressed in mathematical terms by the following equation:
  • CM /1 ⁇ 2, &, . .. , &)
  • the exact form of fuction /( . ..) does not matter. It can be done in any way, but the input information that is used is the set of beta- values ⁇ 1 , ⁇ 2 , ..., ? L of the carrier.
  • Each code channel produces a certain waveform s t (t) at the RF-IC after pulse-shape filtering and digital-to-analog conversion among other operations.
  • the signal has also been scaled by the BB-IC to facilitate efficient usage of the BB-IC/RF-IC interface.
  • two baseband signals are added together in the RF-IC prior to amplification.
  • the signals are shifted, for example 5 MHz apart from each other, before summing them into a single signal.
  • the single signal is input to the DAC.
  • the shifting can be achieved, for example, by shifting one signal by -2.5 MHz (denoted by e ⁇ JOh ' in Equation (5) below), and the other by +2.5MHz (denoted e +ia °' in Equation (5) below).
  • P l the power requested for carrier 1
  • P 2 the power requested for carrier 2.
  • Figure 2 illustrates an example RF-IC 200 for weighting the signals of two carriers to achieve requested power levels, according to an example embodiment of the invention.
  • FIGURE 2 is discussed with reference to two carriers, the teachings can be used for weighting the signal of more than two carriers to achieve requested power levels.
  • the RF-IC 200 comprises modules for weighting the amplitude of the carrier signals before summing the signals together.
  • the amplitude of carrier 1 signal is weighted by
  • the baseband signals of carrier 1 and carrier 2 are weighted by factors u l and u 2 , respectively.
  • the weighting factors u l and u 2 are determined according to the requested power targets P l and P 2 for the two carriers.
  • the weighted baseband signals are summed at the module 203 into one single baseband signal.
  • the resultant single baseband sigal is converted to analog waveform at the DAC 204.
  • the RF-IC 200 comprises a low-pass filter 205 to remove the high frequency component in the analog waveform.
  • the modulator 206 modulates the baseband waveform by the desired frequency (F 1 + F 2 ) / 2 , where F 1 and F 2 are the center carrier frequencies of the two adjacent carriers, respectively.
  • the power amplifier 207 raises the power of the modulated signal to the requested level of the total output power P .
  • w 1 and w 2 contain the weightings that have occurred to the signal prior to summation of them into one signal. They include e.g. the scaling applied by BB-IC prior to BB-IC/RF-IC -interface and the scalings u x and u 2 shown in Figure 2.
  • the RF-IC knows the beta- values for the first carrier ⁇ 1 1 , ⁇ 1 2 , ... , ⁇ 1 ⁇ , the beta-values of the second carrier
  • CM f[ u , ⁇ 1 2 , ..., ⁇ ⁇ ⁇ , ⁇ ' A,2. ⁇ ⁇ ⁇ A 3 ⁇ 4
  • the RF-IC performs the following adjustment before or during the computation of the CM:
  • the CM can be computed based on the beta-values, by adjusting the beta-values with the adjustment shown above.
  • the carrier 1 is selected as a reference carrier.
  • wireless communication networks e.g., HSPA (high speed packet access) networks
  • multi-carrier multi-carrier
  • the same derivation can be extended to multicarrier-case, where there are more than two carriers that are amplified by the same power amplifier.
  • the carrier 1 is selected as the reference carrier, then:
  • n indicates the carrier index
  • Figure 3 depicts an example BB-IC and an example RF-IC that are suitable for cubic metric computation in accordance with an example embodiment of the invention.
  • dual carrier deployment is assumed for the purposes of describing the example embodiments of this invention.
  • the teachings of Figure 3 can be used when there are more than two carriers.
  • the baseband IC 320 includes two data flow branches.
  • the information transmitted through the two data flow branches is generated inside the BB-IC, or may be provided by other entity to the BB-IC.
  • Channel coding and multiplexing is applied to the information of each branch to generate baseband signals by modules 321 and 324, respectively.
  • Each of the data flow branches also comprises a module, 322 and 325, for applying spreading and scrambling operation on the baseband signals when it is applicable, for example, in a HSPA system..
  • the baseband signals from modules 322 and 325 are scaled to constant amplitude or power level at blocks 323 and 326, respectively, before they are provided to the RF-IC 300.
  • the BB-IC is responsible for providing the sets of beta- values or gain values, one for each of the carriers, and the requested power targets, for example P 1 and P 2 , to the RF-IC through the BB/RF interface in order to compute the cubic metric.
  • the RF-IC 300 comprises a pulse shaping filter which is applied on each of the baseband input to control intersymbol interference, 312 and 313. The two baseband signals are then shifted a certain amount of frequency distance, for example, 5MHz, apart from each other at blocks 308 and 309, respectively.
  • the RF-IC 300 in Figure 3 comprises modules for weighting the amplitude of carrier 1 signal by and the amplitude of carrier 2 signal by -— before summing the signals together.
  • the weighting factors and u 2 are determined according to the requested power targets P 1 and P 2 for the two carriers.
  • the weighted baseband signals are summed at the module 303 and the resulting single baseband sigal is converted to analog waveform at the DAC 304.
  • the RF-IC may comprise a low-pass filter 305, which is applied to the analog waveform to remove the high frequency component in the analog waveform.
  • the modulator 306 modulates the baseband waveform by the desired frequency, for example (F 1 + F 2 ) / 2 , where F 1 and F 2 are the center carrier frequencies of the adjacent carriers. In case of more than two carriers, the desired frequency
  • the RF-IC of Figure 3 comprises a module for cubic metric computation 310.
  • the two sets of beta- values and the request power targets P l and P 2 are provided to module 310.
  • module 310 performs the computation according to Equation (7).
  • the module 310 computes the CM based on Equations (11) and (12) illustrated above.
  • the module 310 does not send the computed CM directly back to the BB-IC. Instead, the module 310 calculates the maximum power reduction (MPR) as a function of CM and provides the MRP to BB-IC.
  • MPR maximum power reduction
  • the module 310 directly provides the computed CM to BB-IC.
  • other metric for example, the maximum supported power, may be calculated and provided to BB-IC by the module 310.
  • the apparatus may be a mobile communication device which may be referred to as the UE 103.
  • the apparatus 400 includes a baseband processor 411 and a memory (MEM) 412 coupled to the baseband processor 411 that stores a program of computer instructions (PROG) 413.
  • the PROG 413 causes the baseband processor 411 to perform similar functions as what the BB-IC 320 does in Figure 3.
  • the apparatus 400 also includes a RF processor 401 and a MEM 402 coupled to the RF processor 401 that stores a program of computer instruction 403.
  • the apparatus 400 may further include a suitable transceiver (TRANS) 405 (having a transmitter (TX) and a receiver (RX)) coupled to the RF processor 401.
  • TRANS transceiver
  • the TRANS 405 is for bidirectional wireless communications with other communication devices that are not shown in Figure 4.
  • the apparatus 400 may further include a cubic metric computation unit 404, which is provided more than one set of beta-values and the requested power targets.
  • the CM computation unit 404 together with the RF processor 401 and the PROG 403, is configured to perform the computation of the cubic metric in a similar way as the cubic metric computation module 310 of Figure 3.
  • the CM computation unit 404 is a part of the RF processor 401.
  • At least one of the PROGs 403, 413 is assumed to include program instructions that, when executed by the associated processor, enable the electronic apparatus to operate in accordance with the example embodiments of this disclosure, as discussed herein.
  • the various example embodiments of the apparatus 400 can include, but are not limited to, cellular phones, personal digital assistants (PDAs) having wireless communication capabilities, portable computers having wireless communication capabilities, image capture devices such as digital cameras having wireless communication capabilities, gaming devices having wireless communication capabilities, music storage and playback appliances having wireless communication capabilities, Internet appliances permitting wireless Internet access and browsing, as well as portable units or terminals that incorporate combinations of such functions.
  • PDAs personal digital assistants
  • portable computers having wireless communication capabilities
  • image capture devices such as digital cameras having wireless communication capabilities
  • gaming devices having wireless communication capabilities
  • music storage and playback appliances having wireless communication capabilities
  • Internet appliances permitting wireless Internet access and browsing, as well as portable units or terminals that incorporate combinations of such functions.
  • the example embodiments of this disclosure may be implemented by computer software executable by one or more of the processors 401 and 411 of the apparatus 400, or by hardware, or by a combination of software and hardware.
  • the processors 401 and 411 may be implemented in a single integrated circuit.
  • the MEMs 402 and 412 may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as
  • the MEMs 402 and 412 may be implemented in a single entity.
  • the processors 401 and 411 may be of any type suitable to the local technical environment, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multi-core processor architecture, as non-limiting examples.
  • a technical effect of one or more of the example embodiments disclosed herein may be allowing the cubic metric to be computed accurately for dual-carrier and multiple-carrier communication devices. This allows the baseband IC to determine the correct transmit power level and reduce the non-linearity distortion in the power amplifier.
  • Embodiments of the present invention may be implemented in software, hardware, application logic or a combination of software, hardware and application logic. The software, application logic and/or hardware may reside on an apparatus such as a user equipment, a Node B/base station 301 or other mobile communication devices.
  • part of the software, application logic and/or hardware may reside on a BB-IC 320, part of the software, application logic and/or hardware may reside on a RF-IC 300, and part of the software, application logic and/or hardware may reside on other chipset or integrated circuit.
  • the application logic, software or an instruction set is maintained on any one of various conventional computer-readable media.
  • a "computer-readable medium" may be any media or means that can contain, store, communicate, propagate or transport the instructions for use by or in connection with an instruction execution system, apparatus, or device.
  • a computer-readable medium may comprise a computer-readable storage medium that may be any media or means that can contain or store the instructions for use by or in connection with an instruction execution system, apparatus, or device.
  • example embodiments have been described above in the context of the HSUPA system for uplink transmission, it should be appreciated that the example embodiments of this invention are not limited for use with only this one particular type of wireless communication system, and that they may be used to advantage in other wireless communication systems and in downlink transmission.
  • two adjacent carriers are assumed in Figures 2 and 3 for illustration purpose, the example embodiments of this invention are also suitable for use with more than two carriers and/or with non-adjacent carriers.
  • the various names used for the described parameters are not intended to be limiting in any respect, as these parameters may be identified by any suitable names.
  • the various names assigned to different channels e.g., beta-values, etc. are not intended to be limiting in any respect, as these various channels may be identified by any suitable names.

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

Selon un mode de réalisation, la présente invention concerne un procédé consistant à recevoir au moins deux ensembles de valeurs de gain, chaque ensemble de valeurs de gain représentant les gains d'un ensemble de canaux de code qui sont transportés par chacune d'au moins deux porteuses, à recevoir au moins deux niveaux de puissance ou d'amplitude qui sont attribués auxdites au moins deux porteuses, et à calculer une métrique cubique en fonction desdits au moins deux ensembles de valeurs de gain reçus et desdits au moins deux niveaux de puissance ou d'amplitude reçus.
PCT/IB2010/055235 2009-12-10 2010-11-17 Appareil et procédé de calcul de métrique cubique dans une porteuse double, et système de communication sans fil à porteuses multiples WO2011070460A1 (fr)

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US13/511,354 US8811216B2 (en) 2009-12-10 2010-11-17 Apparatus and method for cubic metric computation in dual-carrier and multi-carrier wireless communication system
CN201080056087.4A CN102652416B (zh) 2009-12-10 2010-11-17 双载波和多载波无线通信系统中计算立方度量的装置和方法
EP10835574.4A EP2510658B1 (fr) 2009-12-10 2010-11-17 Appareil et procédé de calcul de métrique cubique dans une porteuse double, et système de communication sans fil à porteuses multiples

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"Cubic Metric in 3GPP-LTE", 3GPP RL-060023, A CONTRIBUTION PRESENTED IN 3GPP TSG-RAN WG1 LTE ADHOC IN HELSINKI, FINLAND, JAN. 23-26 2006, 23 January 2006 (2006-01-23)
"Modified cubic metric formula for DC-HSUPA", 3GPP R4-092272, A CONTRIBUTION PRESENTED IN 3GPP TSG-RAN WG4 MEETING #5 IBIS, 29 June 2009 (2009-06-29)
"Summary of DC-HSUPA (+DB-DC-HSDPA) Ad Hoc", 3GPP R4-092099, A CONTRIBUTION PRESENTED IN 3GPP TSG-RAN WG4 (RADIO) MEETING #51, 4 May 2009 (2009-05-04)
MOTOROLA: "Cubic Metric in 3GPP-LTE", 3GPP TSG RAN WG1 LTE ADHOC TDOC#, R1-060023, 23 January 2006 (2006-01-23) - 26 January 2006 (2006-01-26), HELSINKI, FINLAND, XP050111166 *
QUALCOMM EUROPE: "UE Transmitter characteristics impact due to DC-HSUPA", 3GPP TSG-RAN WG4 MEETING #51, R4-091680, 4 May 2009 (2009-05-04) - 8 May 2009 (2009-05-08), SAN FRANCISCO, CA, USA, XP050342428 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013058692A3 (fr) * 2011-10-20 2013-07-11 Telefonaktiebolaget L M Ericsson (Publ) Réduction de puissance pour porteuses corrélées dans un système de communication cellulaire
US8767626B2 (en) 2011-10-20 2014-07-01 Telefonaktiebolaget L M Ericsson (Publ) Power reduction for correlated carriers in a cellular communication system
US8644183B2 (en) 2012-06-26 2014-02-04 Qualcomm Incorporated Systems and methods for memory-efficient storage and extraction of maximum power reduction (MPR) values in two-carrier wireless data systems

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EP2510658B1 (fr) 2017-06-28
CN102652416A (zh) 2012-08-29
EP2510658A1 (fr) 2012-10-17
EP2510658A4 (fr) 2015-05-13
US20120275330A1 (en) 2012-11-01
TWI538452B (zh) 2016-06-11
CN102652416B (zh) 2015-07-29
US8811216B2 (en) 2014-08-19

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