WO2004045108A1 - Procede de mise en oeuvre d'une fonction de diversite de transmission en boucle fermee sur le canal specialise - Google Patents

Procede de mise en oeuvre d'une fonction de diversite de transmission en boucle fermee sur le canal specialise Download PDF

Info

Publication number
WO2004045108A1
WO2004045108A1 PCT/CN2003/000948 CN0300948W WO2004045108A1 WO 2004045108 A1 WO2004045108 A1 WO 2004045108A1 CN 0300948 W CN0300948 W CN 0300948W WO 2004045108 A1 WO2004045108 A1 WO 2004045108A1
Authority
WO
WIPO (PCT)
Prior art keywords
power
phase
antenna
power offset
value
Prior art date
Application number
PCT/CN2003/000948
Other languages
English (en)
Chinese (zh)
Inventor
Gang Li
Hui Zhou
Hao Wang
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to AU2003284799A priority Critical patent/AU2003284799A1/en
Publication of WO2004045108A1 publication Critical patent/WO2004045108A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side

Definitions

  • the present invention relates to the diversity transmission technology of a mobile communication system, and particularly to a method for implementing closed-loop transmission of a dedicated channel in a base station of a Wideband Code Division Multiple Access / Universal Mobile Telecommunication System (WCDMA UMTS). Diversity method.
  • WCDMA UMTS Wideband Code Division Multiple Access / Universal Mobile Telecommunication System
  • the base station of a mobile communication system uses two types of transmit diversity to improve the performance of user data transmission, namely open-loop diversity and closed-loop diversity.
  • the base station uses two antennas to transmit user information.
  • the base station adjusts the antenna according to the feedback from the user equipment (UE, User Equipment), and the feedback bit (FBI, Feedback Information) of the UE is transmitted in the uplink dedicated physical control channel (DPCCH, Dedicated Physical Control Channel).
  • DPCCH Downlink dedicated physical control channel
  • the closed-loop transmit diversity itself has two modes of operation.
  • mode 1 the feedback command of the UE controls the phase adjustment to maximize the power received by the UE, so the base station keeps the phase of antenna 1 unchanged, and adjusts the phase of antenna 2 according to the moving average of two consecutive feedback commands.
  • Antenna 2 can use four different phase settings in this mode.
  • mode 2 in addition to phase adjustment, there is also amplitude adjustment, but a four-bit feedback command is used. These four bits are located in four uplink DPCCH slots, one of which is an amplitude adjustment command and three are phase adjustment commands. In this way, there are eight different phases and two different amplitude combinations, and the base station's signal transmission has a total of 16 combinations.
  • closed-loop diversity is only applicable to dedicated channels and downlink shared channels (DSCH, Downlink Shared Channel) used with dedicated channels
  • open-loop diversity can be used for both dedicated channels and common channels.
  • the closed-loop diversity, closed-loop transmit diversity, and dedicated-channel closed-loop transmit diversity in this paper are the same concepts.
  • the concepts of mode 1 and mode 2 have been described above.
  • antenna 1 and antenna 2 can actually be called main antennas and diversity antennas.
  • data In the absence of diversity (open loop or closed loop), data is sent only through antenna 1, and there is no data on antenna 2.
  • diversity In the case of diversity, In addition to sending data from antenna 1, data is also sent from antenna 1.
  • the closed-loop transmit diversity function can be decomposed into three functions: weighting factor calculation, power / phase adjustment, and pilot pattern allocation. among them:
  • the weighting factor calculation is based on the FBI information of the corresponding uplink dedicated physical channel (DPCH, Dedicated Physical Channel) sent by the demodulation frame, and the weighting factor of the current two antennas is calculated once per time slot.
  • DPCH consists of DPCCH and Dedicated Physical Data Channel (DPDCH).
  • the power / phase adjustment uses the calculated weighting factors, and each time slot performs a complex multiplication of the DPCH channel on the two antennas;
  • PILOT pattern allocation means that in closed-loop diversity mode 1, the DPCH sends orthogonal pilot patterns on the two antennas, and in mode 2, the DPCH pilot patterns on the two antennas are the same.
  • the process of PILOT pattern allocation is relatively simple, but the work of calculating weighting factors and weighting the complex signals after spreading is more complicated. This is because the real and imaginary parts of the weighting factor are decimals in many cases, which makes it more difficult to perform complex multiplication.
  • the transmitter structure supporting DPCH closed-loop mode transmit diversity is shown in Figure 1.
  • the channel coding, interleaving and spreading parts are all the same as the non-diversity mode.
  • the weighting factor is determined by the UE, and the D domain bit of the FBI field of the uplink DPCCH is used to notify the WCDMA base station.
  • Mode 1 the weighted factors w 2 are obtained by averaging the phases received in two time slots, and ⁇ is a constant.
  • mode 2 the phase information (FSM ph ) is obtained from the FBI received in three time slots, and the power information (FSM P. ) Is obtained from the FBI of one time slot, and the feedback notification information (FSM, Feedback) formed by the FBI is used. Signalling Message) to obtain the phase difference and the transmit power of the antenna, so as to calculate the weighting factor W ⁇ PW 2 .
  • FSM ph the phase information
  • FSM P. the power information
  • FSM, Feedback the feedback notification information
  • the UE After the uplink DPCH is established (at this time, the downlink DPCH has been established), the UE starts to send the FBI from SlotO, and the base station only receives the FBI of SlotO in mode 1.
  • mode 2 when the three-bit FSM ph is not received, press Table 3 initializes the phase and does not receive a one-bit FSM P. At that time, 0.5 is used as the transmitting power of the antenna.
  • initialization is performed; if the FSM resumes sending at exactly 0, 4, 8, 12 in the uplink time slot, then initialization is performed; if the FSM resumes sending at other time slots, the first bit of the FSM ph is always sent in the current incomplete FSM cycle, and The power of the two antennas is set to be equal; initialization is performed until a new FSM cycle arrives.
  • Table 1 shows the relationship between the feedback instruction FBI and the i-th slot adjustment amount of the uplink radio frame. From Table 1, the phase adjustment amount can be obtained according to the FSM.
  • FSM ph calculates the transmit power (power_antl, power_ant2) and phase difference (phase_diff) of the two antennas, respectively.
  • Table 2 shows the FSM P of the closed-loop mode 2 signaling message. Correspondence with transmit power.
  • Table 3 shows the correspondence between the FSM ph subfield of the closed-loop mode 2 signaling message and the phase difference between the antennas.
  • a weighting factor W is calculated by the following equation (2) ⁇ PW 2.
  • Equation (2) is a vector representation, Wl of the top row indicates, represents the lower row w 2.
  • a common design method is to use a register to store the value after the integer squared according to the design accuracy requirements.
  • the value includes the decimal part, and the register is used to indicate the number of decimal places. Since the weighting factor calculated by closed-loop transmit diversity needs to be multiplied with the coded data after spreading, such a design method becomes more complicated when performing complex multiplication. Not only is the amount of calculations extremely large, but it also consumes a lot of resources.
  • the general form of the complex weighting factor is Aexp (j phase_diff).
  • the weighting factor may be A,-A, Aj,-Aj, 2 -1 2 A (1 + j), 2- 1 2 A (l -j), 2- 1/2 A (-1 + j), 2-1/2 A (-1-j).
  • the values of A are 0.5 1/2 , 0.2 1/2, and 0.8 1 2 . Multiplying these complex weighting factors and spread-spectrum data directly consumes a large amount of chip resources and is difficult to implement. Summary of the invention
  • the main object of the present invention is to provide a method for implementing a dedicated channel closed-loop transmit diversity function, so as to reduce calculation complexity and reduce occupation of system resources.
  • the present invention provides a method for implementing a dedicated channel closed-loop transmit diversity function.
  • the method separately calculates the weighting factors of the antenna 1 and the antenna 2 according to the feedback information of the mobile terminal, and further includes: A.
  • the weighting factor of each antenna is decomposed into a phase complex multiplication coefficient and a power offset term, and the power offset term is converted to obtain a power offset A_dB.
  • the phase complex multiplication coefficients are both real and imaginary parts ⁇ 1 Or a plural of 0;
  • step C Use the power offset A-dB to obtain a power amplitude value, and then use the obtained power amplitude value to transmit the framed data after the phase adjustment in step B on the corresponding antenna.
  • the power offset in step A can be obtained by taking the log of the power offset and multiplying by 20.
  • Obtaining the power amplitude value in step C may be obtained by subtracting the power offset A-dB from the power dB value calculated by the power control module, and then checking the power quantization table by using the difference between the two.
  • step A When the power offset terms in step A are 0.5 1/2 and 0.8 1 2 , the power offsets A-dB are -3.01 dB and -0.97 dB, respectively.
  • Step A power offset is a power offset term and taken to give the product of 2 n, and then multiplied by the number of 20, wherein n is an integer;
  • Obtaining the corresponding power amplitude value in step C is to subtract the power offset A-dB from the power dB value calculated by the power control module, and use the difference between the two to check the power quantization table to obtain the corresponding power amplitude value. , And then right-shift the power amplitude value by n bits.
  • step A When the power offset term in step A is 0.2 1/2 , the power offset A-dB is -0.97dB, and n is 1.
  • the phase multiplication coefficient corresponding to the weighting factor of antenna 1 in step A is zero.
  • Step B can include:
  • the real part of the eight results is sequentially input to a first multi-selector, and the imaginary part is sequentially input to a second multi-selector.
  • the multi-selector is an eight-select one-selector.
  • step B4 Use the phase multiplication coefficient obtained in step A as the selection signal of the first and second multi selectors, and use the data output by the first multi selector as the real part, and the data output by the second multi selector. Is the imaginary part, and the complex number of the combination of the real part and the imaginary part is taken as a result of the complex multiplication operation of the phase complex multiplication coefficient and the framing data to complete the phase adjustment of the framing data.
  • the invention adopts a new type of fixed-point optimization algorithm as the key technology of the closed-loop transmit diversity implementation scheme, and solves the problems existing in the prior art well.
  • the weighting factor is decomposed into three parts: phase complex multiplication coefficient, power offset, and right shift number; correspondingly, the complex coefficient weighted multiplication is also decomposed into a multi-selector and power quantization.
  • Table offset and shift operations are performed in three parts to achieve phase adjustment and power adjustment, and finally realize the weighting effect of the closed-loop diversity weighting factor on downlink dedicated channel data. This greatly simplifies the chip design and satisfies the accuracy requirements while occupying less chip resources.
  • the method of the present invention has the following advantages:
  • the algorithm using the complex weighting factor of the closed-loop transmit diversity of the downlink dedicated channel also simplifies the implementation of the closed-loop transmit diversity function of the downlink shared channel, which is easy Realize the power control process of the downlink shared channel.
  • FIG. 1 is a schematic diagram of a closed-loop transmit diversity function in the prior art
  • FIG. 2 is a schematic diagram of the phase adjustment of the antenna 2 in the present invention. Mode of Carrying Out the Invention
  • Phase complex multiplication factor A complex number C with real and imaginary parts of ⁇ 1 or 0;
  • the implementation method of multiplying by a decimal A is as follows: Convert A into the decibel number A—dB (then -3.01dB ⁇ A— dB 3.01dB), check the power quantization in the power control module Before the table, subtract the offset A- dB from the power dB value.
  • WCDMA downlink physical channel modulation implements channel power weighting, it is necessary to look up the power quantization table to obtain the channel power amplitude value according to the channel power dB value. Therefore, the implementation of the above-mentioned decimal A can be completed together during the table lookup operation, and only takes up little Additional resources. And by extracting l / 2 n to make A between 0.5-1, so as to improve the calculation accuracy.
  • the weighting factor decomposition of mode 1 is relatively simple.
  • the weighting factor ⁇ ⁇ of antenna 1 is a constant. After taking the logarithm, the power offset is -3.01dB.
  • the weighting factor w 2 of antenna 2 is calculated by formula (1). There are four This value is determined by the value of the 2-bit FSM instruction. Day
  • the weighting factor of line 2 can be decomposed into two parts: the right shift number and the phase multiplication factor.
  • Table 4 The decomposition of the weighting factors of antenna 1 and antenna 2 in the whole mode 1 is shown in Table 4.
  • antenna 2 The weighting factor is nothing more than (l + j) / 2, (lj) / 2, (-l + j) / 2,-(l + j) / 2, because dividing by 2 is equivalent to the data stored in the register. Shift by one bit, so it can be decomposed into right shift number and phase complex coefficient.
  • the calculation of the weighting factor for Mode 2 is based on the FSM instruction to look up Table 2 and Table 3 to obtain the transmission power and phase difference.
  • the decomposition is more complicated, as shown in Table 5.
  • the item of weighting coefficient in Table 5 is to look up Table 2 and Table 3 according to the FSM instruction, and calculate the weighting factor of Mode 2 by formula 2. It can be divided into two cases: antenna 1 and antenna 2.
  • the weighting factor for mode 2 is composed of a 3-bit FSM ph and a 1-bit FSM P. A total of 4 bits of FSM instructions are calculated, and mode 1 only requires 2 bits of FSM instructions. The correspondence between these FSM instructions and the parameters of antenna 1 and antenna 2 is also shown in Table 5. Table 5 shows the decomposition of the weighting factor for Mode 2.
  • the weighting factor W1 of the antenna 1 can be decomposed into two parts: a power offset and a right shift number.
  • the specific values of these two parts are related to the FSM instruction.
  • the weighting factor w 2 of the antenna 2 can be decomposed into three parts: a power offset, a right shift number, and a phase complex multiplication factor. Their values are also determined by the value of the FSM.
  • the weighting factor of antenna 2 will form a complex number C with real and imaginary parts of ⁇ 1 or 0.
  • the complex number C When the complex number C is multiplied with the framed data, the framed data will be changed. Phase, so the complex number C can be called a phase complex multiplication coefficient.
  • phase complex multiplication coefficient is encoded as a phase selection signal, and the phase selection signal starts from 0 and goes to 7 and is expressed in binary.
  • Table 6 shows the correspondence table between the phase multiplication coefficients and the selection signals.
  • the phase adjustment circuits of the I and Q data can be conveniently implemented, as shown in FIG.
  • the output I data after phase adjustment are I, -I, -Q, Q, I + Q,-(I + Q), QI, IQ, corresponding to the complex multiplication operation results in Table 6.
  • the real part of the output Q after phase adjustment is Q, -Q, I, -1, QI, IQ, I + Q,-(I + Q) 'corresponds to the imaginary part of the complex multiplication result in Table 6. . Since the antenna 2 has a phase complex multiplication coefficient, only the antenna 2 needs to perform the phase adjustment operation.
  • a decimal A bounded between 2 1/2 and 2 1/2 will be formed.
  • the decimal A is converted into a value in dB by taking a logarithmic operation.
  • A_dB called the power offset, works with the right shift number n on the power control module in the downlink dedicated channel modulation.
  • the encoded data passes through the physical After framing, spreading is performed according to the channelization code, and then multiplication is performed with the scrambling code to obtain the scrambled data. Finally, the power output by the power control module modulates and outputs the scrambled data. Therefore, power control is also an important functional point in downlink dedicated channel modulation.
  • the inner loop power control In the power control module, the inner loop power control, limited power growth, and power balancing are mainly implemented.
  • the output of the power control will directly affect the scrambled data of the dedicated channel. Therefore, after the power control module calculates the specific power dB value of each domain of the dedicated channel, it needs to subtract the power offset A_dB of the closed-loop diversity, and then check the power quantization table to obtain the corresponding power amplitude value.
  • the right shift number is used to shift the power amplitude value to achieve the weighting effect of the closed-loop diversity weighting factor on the downlink dedicated channel data.
  • the present invention decomposes the weighting factor into three parts: a phase complex multiplication coefficient C, a power offset A-dB, and a right shift number n; accordingly, the complex coefficient weighted multiplication It is also decomposed into three parts of multi-selector, power quantization table shift and shift operation, which greatly simplifies the chip design. This algorithm also satisfies the accuracy requirements while occupying less chip resources.
  • Table 7 is a power quantization table used in the present invention.
  • the power is obtained by looking up Table 7, which includes the power address value (that is, the power dB value mentioned above) and the corresponding value.
  • the power amplitude value is expressed in decimal here, but in actual operation, the power amplitude value expressed in binary is used.
  • the power amplitude value is multiplied with the data to be transmitted, and then transmitted through the antenna. The power amplitude value determines the energy of the transmitted data. As can be seen from Table 7, the larger the power address value, the smaller the power amplitude value, and vice versa. When there is no transmit diversity, only antenna 1 sends data.
  • both antenna 1 and antenna 2 send data. Therefore, the power of both antennas is required to decrease.
  • the power when transmitting is the same.
  • the decrease of the power amplitude value requires the increase of the power address value, so in this sense, an offset must be added to the power address value.
  • A-dB is a negative number, so subtracting this negative number can achieve the effect of "plus”, that is, the effect of increasing the power address value and reducing the power amplitude value.
  • the default dedicated channel refers to the downlink dedicated physical channel.
  • the so-called uplink is from the UE to the base station, and the downlink is from the base station to the UE.
  • the uplink DPCH is divided into DPDCH and DPCCH.
  • DPDCH transmits data and DPCCH transmits control information.
  • the DPCCH has an FBI field, which is used to notify the base station to adjust the phase or amplitude.
  • the downlink DPCH is also divided into DPDCH and DPCCH.
  • DPDCH transmits data and DPCCH transmits control information.
  • DPCCH has three domains: TPC, TFCI and Pilot.
  • TPC time slots
  • TFCI TFCI and Pilot.

Landscapes

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

Abstract

L'invention concerne un procédé de mise en oeuvre d'une fonction de diversité de transmission en boucle fermée sur le canal spécialisé, qui consiste à décomposer le facteur de pondération de chaque antenne en un coefficient de multiplication complexe de phase et un terme de décalage de puissance, à obtenir la valeur de décalage de puissance A_dB en convertissant le terme de décalage de puissance, ledit coefficient de multiplication complexe de phase étant le nombre complexe dont la partie réelle et la partie imaginaire sont égales à ? 1 ou 0 ; à effectuer une modulation de phase des données de mise en trame en utilisant le coefficient de multiplication complexe de phase ; à obtenir une valeur d'amplitude de puissance en utilisant ladite valeur de décalage de puissance A_dB, puis en utilisant la valeur d'amplitude de puissance obtenue, en transmettant les données de mise en trame de phase modulée au stade B par le biais de l'antenne correspondante, ce qui permet de mettre en oeuvre la fonction de pondération du facteur de pondération en boucle fermée pour le canal spécialisé de liaison descendante. Ainsi, la conception de puces est considérablement facilitée et répond, de préférence, à l'exigence d'exactitude du fait qu'elle sollicite moins de ressources de puces.
PCT/CN2003/000948 2002-11-11 2003-11-11 Procede de mise en oeuvre d'une fonction de diversite de transmission en boucle fermee sur le canal specialise WO2004045108A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003284799A AU2003284799A1 (en) 2002-11-11 2003-11-11 Method for implementing a function of closed loop transmitting diversity on the dedicated channel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN 02148361 CN1278505C (zh) 2002-11-11 2002-11-11 实现专用信道闭环发射分集功能的方法
CN02148361.2 2002-11-11

Publications (1)

Publication Number Publication Date
WO2004045108A1 true WO2004045108A1 (fr) 2004-05-27

Family

ID=32304065

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2003/000948 WO2004045108A1 (fr) 2002-11-11 2003-11-11 Procede de mise en oeuvre d'une fonction de diversite de transmission en boucle fermee sur le canal specialise

Country Status (3)

Country Link
CN (1) CN1278505C (fr)
AU (1) AU2003284799A1 (fr)
WO (1) WO2004045108A1 (fr)

Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7272359B2 (en) 2004-01-26 2007-09-18 Magnolia Broadband Inc. Communicating signals according to a quality indicator using multiple antenna elements
US7321636B2 (en) 2001-05-31 2008-01-22 Magnolia Broadband Inc. Communication device with smart antenna using a quality-indication signal
CN100370705C (zh) * 2004-06-03 2008-02-20 大唐移动通信设备有限公司 多天线系统下行信道发射功率的配置方法
US7418067B1 (en) 2003-04-14 2008-08-26 Magnolia Broadband Inc. Processing diversity signals at a mobile device using phase adjustments
US7430430B2 (en) 2003-12-16 2008-09-30 Magnolia Broadband Inc. Adjusting a signal at a diversity system
US7505741B2 (en) 2002-11-01 2009-03-17 Magnolia Broadband Inc. Processing diversity signals using a delay
US7515877B2 (en) 2004-11-04 2009-04-07 Magnolia Broadband Inc. Communicating signals according to a quality indicator and a time boundary indicator
US7558591B2 (en) 2004-10-12 2009-07-07 Magnolia Broadband Inc. Determining a power control group boundary of a power control group
US7616930B2 (en) 2005-05-24 2009-11-10 Magnolia Broadband Inc. Determining a phase adjustment in accordance with power trends
US7630445B1 (en) 2005-10-25 2009-12-08 Magnolia Broadband Inc. Establishing slot boundaries of slots of a diversity control feedback signal
US7633905B1 (en) 2005-09-02 2009-12-15 Magnolia Broadband Inc. Calibrating a transmit diversity communication device
US7663545B2 (en) 2006-12-26 2010-02-16 Magnolia Broadband Inc. Method, system and apparatus for determining antenna weighting for transmit diversity
US7746946B2 (en) 2005-10-10 2010-06-29 Magnolia Broadband Inc. Performing a scan of diversity parameter differences
US7783267B1 (en) 2005-06-23 2010-08-24 Magnolia Broadband Inc. Modifying a signal in response to quality indicator availability
US7796717B2 (en) 2005-11-02 2010-09-14 Magnolia Brandband Inc. Modifying a signal according to a diversity parameter adjustment
US7835702B1 (en) 2005-09-15 2010-11-16 Magnolia Broadband Inc. Calculating a diversity parameter adjustment according to previously applied diversity parameter adjustments
US7869535B2 (en) 2007-02-28 2011-01-11 Magnolia Broadband Inc. Method, system and apparatus for phase control of transmit diversity signals
US7945222B2 (en) 2007-03-14 2011-05-17 Magnolia Broadband Inc. Method, apparatus and system for providing transmit diversity feedback
US7949069B2 (en) 2006-10-26 2011-05-24 Magnolia Broadband Inc. Method, system and apparatus for applying hybrid ARQ to the control of transmit diversity
US7965987B2 (en) 2005-11-03 2011-06-21 Magnolia Broadband Inc. Amplifying a transmit signal using a fractional power amplifier
US7991365B2 (en) 2007-03-01 2011-08-02 Magnolia Broadband Inc. Method, system and apparatus for estimation of propagation path variability of a transmit diversity channel
US8014734B2 (en) 2007-03-15 2011-09-06 Magnolia Broadband Inc. Method, apparatus and system for controlling a transmit diversity device
US8027374B2 (en) 2006-12-27 2011-09-27 Magnolia Broadband Inc. Method, system and apparatus for transmit diversity control
US8032091B2 (en) 2007-03-14 2011-10-04 Magnolia Broadband Inc. Method, apparatus and system for providing transmit diversity feedback during soft handoff
US8032092B2 (en) 2007-12-06 2011-10-04 Magnolia Broadband Inc. System, apparatus and method for introducing antenna pattern variability
US8036603B2 (en) 2007-03-15 2011-10-11 Magnolia Broadband Inc. Method, apparatus and system for providing feedback to a transmit diversity device
US8046017B2 (en) 2007-03-15 2011-10-25 Magnolia Broadband Inc. Method and apparatus for random access channel probe initialization using transmit diversity
US8150441B2 (en) 2006-11-06 2012-04-03 Magnolia Broadband Inc. Modifying a signal by controlling transmit diversity parameters
US8199735B2 (en) 2006-12-12 2012-06-12 Google Inc. Method, system and apparatus for the control of transmit diversity
US8249187B2 (en) 2002-05-09 2012-08-21 Google Inc. System, method and apparatus for mobile transmit diversity using symmetric phase difference
US8442457B2 (en) 2009-09-08 2013-05-14 Google Inc. System and method for adaptive beamforming for specific absorption rate control
US8630595B2 (en) 2007-03-01 2014-01-14 Google Inc. System, method and apparatus for transmit diversity control based on variations in propagation path
US8699968B2 (en) 2007-03-14 2014-04-15 Google Inc. Using multiple and a single feedback for UE uplink beamforming in soft handoff
US8731489B2 (en) 2007-03-15 2014-05-20 Google Inc. Method and apparatus for random access channel probe initialization using transmit diversity
US8750811B2 (en) 2007-03-14 2014-06-10 Google Inc. Method, apparatus and system for phase difference adjustment in transmit diversity
US8849222B2 (en) 2011-02-16 2014-09-30 Google Inc. Method and device for phase adjustment based on closed-loop diversity feedback
US8958757B2 (en) 2010-05-10 2015-02-17 Google Inc. System, method and apparatus for mobile transmit diversity using symmetric phase difference
US9048913B2 (en) 2010-07-06 2015-06-02 Google Inc. Method and apparatus for adaptive control of transmit diversity to provide operating power reduction

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006047909A1 (fr) * 2004-11-04 2006-05-11 Huawei Technologies Co., Ltd. Procede pour ameliorer a l'aide d'une retroaction les performances de diversite d'emission d'un systeme a multiples entrees et multiples sorties
KR101677787B1 (ko) * 2009-10-02 2016-11-18 인터디지탈 패튼 홀딩스, 인크 다수의 안테나들을 갖는 디바이스들에 대한 전력 제어
CN101958740B (zh) * 2010-09-21 2012-10-31 山东大学 用于移动通信系统的4天线闭环发射分集方法
CN102958143A (zh) * 2011-08-18 2013-03-06 中兴通讯股份有限公司 一种控制上行闭环发射分集的方法和系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1291011A (zh) * 1999-08-24 2001-04-11 三星电子株式会社 闭环发射天线分集方法以及基站设备和移动台设备
WO2001043311A1 (fr) * 1999-12-06 2001-06-14 Matsushita Electric Industrial Co., Ltd. Terminal de communication et methode de communication sans fil
EP1175022A2 (fr) * 2000-07-21 2002-01-23 Samsung Electronics Co., Ltd. Méthode pour antennes de transmission en diversité, station de base et station mobile correspondantes
EP1191755A2 (fr) * 2000-09-26 2002-03-27 Nokia Corporation Algorithme d'estimation du déphasage d'antennes pour un système WCDMA pourvu d'un émetteur à diversité d'antennes à boucle fermée

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1291011A (zh) * 1999-08-24 2001-04-11 三星电子株式会社 闭环发射天线分集方法以及基站设备和移动台设备
WO2001043311A1 (fr) * 1999-12-06 2001-06-14 Matsushita Electric Industrial Co., Ltd. Terminal de communication et methode de communication sans fil
EP1175022A2 (fr) * 2000-07-21 2002-01-23 Samsung Electronics Co., Ltd. Méthode pour antennes de transmission en diversité, station de base et station mobile correspondantes
EP1191755A2 (fr) * 2000-09-26 2002-03-27 Nokia Corporation Algorithme d'estimation du déphasage d'antennes pour un système WCDMA pourvu d'un émetteur à diversité d'antennes à boucle fermée

Cited By (55)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7792207B2 (en) 2001-05-31 2010-09-07 Magnolia Broadband Inc. Communication device with smart antenna using a quality-indication signal
US7321636B2 (en) 2001-05-31 2008-01-22 Magnolia Broadband Inc. Communication device with smart antenna using a quality-indication signal
US8634495B2 (en) 2001-05-31 2014-01-21 Google Inc. System, method and apparatus for mobile transmit diversity using symmetric phase difference
US9166665B2 (en) 2001-05-31 2015-10-20 Google Inc. System, method and apparatus for mobile transmit diversity using symmetric phase difference
US8249187B2 (en) 2002-05-09 2012-08-21 Google Inc. System, method and apparatus for mobile transmit diversity using symmetric phase difference
US7505741B2 (en) 2002-11-01 2009-03-17 Magnolia Broadband Inc. Processing diversity signals using a delay
US7418067B1 (en) 2003-04-14 2008-08-26 Magnolia Broadband Inc. Processing diversity signals at a mobile device using phase adjustments
US7430430B2 (en) 2003-12-16 2008-09-30 Magnolia Broadband Inc. Adjusting a signal at a diversity system
US7272359B2 (en) 2004-01-26 2007-09-18 Magnolia Broadband Inc. Communicating signals according to a quality indicator using multiple antenna elements
CN100370705C (zh) * 2004-06-03 2008-02-20 大唐移动通信设备有限公司 多天线系统下行信道发射功率的配置方法
US7558591B2 (en) 2004-10-12 2009-07-07 Magnolia Broadband Inc. Determining a power control group boundary of a power control group
US7515877B2 (en) 2004-11-04 2009-04-07 Magnolia Broadband Inc. Communicating signals according to a quality indicator and a time boundary indicator
US7616930B2 (en) 2005-05-24 2009-11-10 Magnolia Broadband Inc. Determining a phase adjustment in accordance with power trends
US7783267B1 (en) 2005-06-23 2010-08-24 Magnolia Broadband Inc. Modifying a signal in response to quality indicator availability
US7885618B1 (en) 2005-09-02 2011-02-08 Magnolia Broadband Inc. Generating calibration data for a transmit diversity communication device
US7633905B1 (en) 2005-09-02 2009-12-15 Magnolia Broadband Inc. Calibrating a transmit diversity communication device
US7835702B1 (en) 2005-09-15 2010-11-16 Magnolia Broadband Inc. Calculating a diversity parameter adjustment according to previously applied diversity parameter adjustments
US7746946B2 (en) 2005-10-10 2010-06-29 Magnolia Broadband Inc. Performing a scan of diversity parameter differences
US7630445B1 (en) 2005-10-25 2009-12-08 Magnolia Broadband Inc. Establishing slot boundaries of slots of a diversity control feedback signal
US7796717B2 (en) 2005-11-02 2010-09-14 Magnolia Brandband Inc. Modifying a signal according to a diversity parameter adjustment
US8351882B2 (en) 2005-11-03 2013-01-08 Google Inc. Amplifying a transmit signal using a fractional power amplifier
US7965987B2 (en) 2005-11-03 2011-06-21 Magnolia Broadband Inc. Amplifying a transmit signal using a fractional power amplifier
US7949069B2 (en) 2006-10-26 2011-05-24 Magnolia Broadband Inc. Method, system and apparatus for applying hybrid ARQ to the control of transmit diversity
US8150441B2 (en) 2006-11-06 2012-04-03 Magnolia Broadband Inc. Modifying a signal by controlling transmit diversity parameters
US8351976B2 (en) 2006-11-06 2013-01-08 Google Inc. Modifying a signal by controlling transmit diversity parameters
US8630678B2 (en) 2006-11-06 2014-01-14 Google Inc. Modifying a signal by controlling transmit diversity parameters
US8199735B2 (en) 2006-12-12 2012-06-12 Google Inc. Method, system and apparatus for the control of transmit diversity
US8009096B2 (en) 2006-12-26 2011-08-30 Magnolia Broadband Inc. Method, system and apparatus for determining antenna weighting for transmit diversity
US7663545B2 (en) 2006-12-26 2010-02-16 Magnolia Broadband Inc. Method, system and apparatus for determining antenna weighting for transmit diversity
US8027374B2 (en) 2006-12-27 2011-09-27 Magnolia Broadband Inc. Method, system and apparatus for transmit diversity control
US7869535B2 (en) 2007-02-28 2011-01-11 Magnolia Broadband Inc. Method, system and apparatus for phase control of transmit diversity signals
US8630595B2 (en) 2007-03-01 2014-01-14 Google Inc. System, method and apparatus for transmit diversity control based on variations in propagation path
US7991365B2 (en) 2007-03-01 2011-08-02 Magnolia Broadband Inc. Method, system and apparatus for estimation of propagation path variability of a transmit diversity channel
US9537544B2 (en) 2007-03-01 2017-01-03 Google Inc. System, method and apparatus for transmit diversity control based on variations in propogation path
US8032091B2 (en) 2007-03-14 2011-10-04 Magnolia Broadband Inc. Method, apparatus and system for providing transmit diversity feedback during soft handoff
US8699968B2 (en) 2007-03-14 2014-04-15 Google Inc. Using multiple and a single feedback for UE uplink beamforming in soft handoff
US7945222B2 (en) 2007-03-14 2011-05-17 Magnolia Broadband Inc. Method, apparatus and system for providing transmit diversity feedback
US9402237B2 (en) 2007-03-14 2016-07-26 Google Inc. Using multiple and a single feedback for UE uplink beamforming in soft handoff
US8249528B2 (en) 2007-03-14 2012-08-21 Google Inc. Method, apparatus and system for providing transmit diversity feedback during soft handoff
US8750811B2 (en) 2007-03-14 2014-06-10 Google Inc. Method, apparatus and system for phase difference adjustment in transmit diversity
US9210672B2 (en) 2007-03-15 2015-12-08 Google Inc. Method and apparatus for random access channel probe initialization using transmit diversity
US8014734B2 (en) 2007-03-15 2011-09-06 Magnolia Broadband Inc. Method, apparatus and system for controlling a transmit diversity device
US8116693B2 (en) 2007-03-15 2012-02-14 Magnolia Broadband Inc. Method, apparatus and system for providing feedback to a transmit diversity device
US8731489B2 (en) 2007-03-15 2014-05-20 Google Inc. Method and apparatus for random access channel probe initialization using transmit diversity
US8046017B2 (en) 2007-03-15 2011-10-25 Magnolia Broadband Inc. Method and apparatus for random access channel probe initialization using transmit diversity
US8351866B2 (en) 2007-03-15 2013-01-08 Google Inc. Method, apparatus and system for providing feedback to a transmit diversity device
US8036603B2 (en) 2007-03-15 2011-10-11 Magnolia Broadband Inc. Method, apparatus and system for providing feedback to a transmit diversity device
US8032092B2 (en) 2007-12-06 2011-10-04 Magnolia Broadband Inc. System, apparatus and method for introducing antenna pattern variability
US8442457B2 (en) 2009-09-08 2013-05-14 Google Inc. System and method for adaptive beamforming for specific absorption rate control
US9246216B2 (en) 2009-09-08 2016-01-26 Google Inc. System and method for adaptive beam forming for specific absorption rate control
US8630596B2 (en) 2009-09-08 2014-01-14 Google Inc. System and method for adaptive beamforming for specific absorption rate control
US8958757B2 (en) 2010-05-10 2015-02-17 Google Inc. System, method and apparatus for mobile transmit diversity using symmetric phase difference
US9048913B2 (en) 2010-07-06 2015-06-02 Google Inc. Method and apparatus for adaptive control of transmit diversity to provide operating power reduction
US9246570B2 (en) 2011-02-16 2016-01-26 Google Inc. Method and device for phase adjustment based on closed-loop diversity feedback
US8849222B2 (en) 2011-02-16 2014-09-30 Google Inc. Method and device for phase adjustment based on closed-loop diversity feedback

Also Published As

Publication number Publication date
CN1499756A (zh) 2004-05-26
AU2003284799A1 (en) 2004-06-03
CN1278505C (zh) 2006-10-04

Similar Documents

Publication Publication Date Title
WO2004045108A1 (fr) Procede de mise en oeuvre d'une fonction de diversite de transmission en boucle fermee sur le canal specialise
Love et al. Limited feedback diversity techniques for correlated channels
US8355424B2 (en) Method and apparatus for multi-antenna transmission in uplink
US7123645B2 (en) Spread-spectrum signal receiver
CN100492937C (zh) 具有多天线的移动终端及其方法
Viswanath et al. Sum capacity of the vector Gaussian broadcast channel and uplink–downlink duality
US7483675B2 (en) Method and system for weight determination in a spatial multiplexing MIMO system for WCDMA/HSDPA
CN1256815C (zh) 利用多于两个天线的发送分集的设备和方法
KR100978841B1 (ko) 레이크 수신기가 구비된 광대역 코드분할 다중 접속네트워크에서 간섭 억제를 통해 폐루프 송신 다이버시티모드 성능을 개선한 방법 및 장치
US7613432B2 (en) Method of controlling mobile communication system, control device, and mobile communication system
TW201840145A (zh) 束波成型索引空間調變的方法
JP2008533872A (ja) ダウンリンクｍｉｍｏチャネルデータレートの調整のためにチャネル性能フィードバックを提供するようにアップリンクリソースを低減するためのシステムおよび方法
JP2002508137A (ja) ワイヤレス通信システムで使用する加入者ユニットおよび方法
WO2005099125A1 (fr) Structure de trame d'une voie de transmission d'informations de commande de liaison montante pour systeme mimo
CN101079660B (zh) 多用户jt mimo系统中的下行链路功率分配方法
JP2004166232A (ja) データシンボルのストリームを送信するための方法及びシステム
JP2003032146A (ja) 信号受信方法
EP2712245B1 (fr) Procédé et équipement utilisateur pour commande de puissance dans un canal entrées multiples sorties multiples de liaison montante
CN107113036A (zh) 用于mimo通信的方法和系统
CN103378894B (zh) 在该无线电通信系统中执行的方法
CN111585620A (zh) 基于最小化发射功率的人工噪声辅助的广义空间调制方法
Zhou et al. A low-complexity multiuser adaptive modulation scheme for massive MIMO systems
WO2010067195A1 (fr) Estimation snir dans système hspa à application mimo
US20130308686A1 (en) Transmission and Detection in Multiple-Antenna Transmission Systems
CN107070515A (zh) 一种莱斯衰落信道条件下的d2d协作传输方法

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): BW GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP