EP1792418A2 - Dispositif de transmission sans fil comportant de multiples antennes et procede associe - Google Patents

Dispositif de transmission sans fil comportant de multiples antennes et procede associe

Info

Publication number
EP1792418A2
EP1792418A2 EP05776345A EP05776345A EP1792418A2 EP 1792418 A2 EP1792418 A2 EP 1792418A2 EP 05776345 A EP05776345 A EP 05776345A EP 05776345 A EP05776345 A EP 05776345A EP 1792418 A2 EP1792418 A2 EP 1792418A2
Authority
EP
European Patent Office
Prior art keywords
signals
signal
weights
baseband
antenna
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP05776345A
Other languages
German (de)
English (en)
Inventor
Yanzhong Philips Electronics China DAI
Xuecheng Philips Electronics China QIAN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
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 Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Publication of EP1792418A2 publication Critical patent/EP1792418A2/fr
Withdrawn legal-status Critical Current

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
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/0842—Weighted combining
    • H04B7/0848—Joint weighting
    • 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
    • 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
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/084—Equal gain combining, only phase adjustments

Definitions

  • This invention relates to a wireless communication apparatus and its method, and more particularly to a wireless communication apparatus with multiple antennas and its method.
  • single-antenna systems can be upgraded to multiple-antenna systems without major modification.
  • the software and hardware design of existing standard baseband processing modules can be utilized in the new system, which will result in a remarkable reduction in design cost.
  • the two solutions only realized the utilization of software and hardware design of the baseband section.
  • the utilization of the RF section is left untouched, that is, multiple parallel paths are needed to process RF signals given by multiple antennas with several operations including amplification, down-conversion and analog-digital conversion, after which the multiple signals are combined and transmitted to the baseband section. Therefore, the single signal processing path in the RF section of existing single-antenna system needs modification and redesign to be deployed in a multiple-antenna system, which to some extent will increase the design difficulty and executive cost.
  • the invention provides a wireless communication apparatus comprising multiple antennas, a multiple-antenna signal processing module, a
  • the invention provides a method used in the multiple- antenna wireless communication apparatus, which comprises the step of: receiving a plurality of RF signals and combining them into a single RF signal; converting the single
  • RF signal is processed, only one multiple-antenna module is required to be inserted into existing standard single-antenna system for the combination operation, and the design of the existing standard single antenna system can be reused by the followed RF and baseband signal process. Therefore, the design can be simplified to decrease the design difficulty and implementation cost.
  • Fig.1 illustrates a block diagram of a typical single-antenna mobile telephone in a TD-SCDMA system
  • Fig. 2 illustrates a block diagram of the receiving apparatus of a multiple-antenna mobile terminal with TD-SCDMA system according to an embodiment of this invention.
  • Fig.4 illustrates a block diagram of the receiving apparatus of a multiple-antenna mobile terminal with TD-SCDMA system according to another embodiment of this invention.
  • Fig. 2 is a block diagram of the receiving device of a multi-antenna mobile terminal in a TD-SCDMA system according to an embodiment of this invention.
  • the receiving device in Fig.2 has one additional multiple-antenna (MA) module 600.
  • the delay generated by this MA module 600 is so little that it can be neglected.
  • this receiving device includes two antennas 100 and 101, a
  • the MA module 600 a RF signal processing module including a RF module 200 and a ADC/DAC module 300, and a baseband processing module comprising a baseband physical layer processing module 400 and a baseband upper layer processing module 500.
  • the two antennas 100 and 101 are designed to receive RF signals.
  • the MA module 600 is connected with the two antennas 100 and 101 and is designed to combine the received two
  • the operations executed by the MA module 600 includes: performing weight calculation on the parameter information contained in the two channels of RF signals received by the two antennas 100 and 101, performing amplitude and phase adjustment on the two channels of RF signals according to the calculation result to combine the two channels of signals into a single-channel signal and transmit the combined signal to the RF module 200. Detailed operations of the MA module 600 will be illustrated later.
  • the RF module 200 is designed to perform amplification and down-conversion on the signals combined by the MA module 600 to convert them into intermediate frequency signals or analog baseband signals.
  • the ADC/DAC module 300 which is connected to the output end of the RF module 200, is designed to sample and quantize the intermediate frequency signals or analog baseband signals from the RF module 200 to convert them into digital baseband signals, during the course of downlink data processing.
  • the baseband physical layer processing module 400 is designed to perform baseband signal processing operations on digital baseband signals outputted from the ADC/DAC module 300, including: Rake receiving, despreading, demodulation, deinterleave, joint detection (JD), Viterbi/Turbo decoding and so on.
  • the baseband upper layer processing module 500 is designed to perform the processing operation of the data link layer, the network layer or higher layer on the data outputted from the baseband physical layer processing module 400, including: upper layer signaling processing, source encoding/decoding and so on.
  • the MA module 600 includes: weight adjusting modules 601 and 602, a combination module 610, two RF modules 621 and 622, two ADC modules 631 and 632, a weight-generating module 640 and two DAC modules 651 and 652.
  • the weight adjusting modules 601 and 602 are connected to the two antennas 100 and 101 respectively, to adjust the amplitude and phase of RF signals.
  • the weight adjusting module 601 and 602 can be realized by two multipliers.
  • the combination module 610 is designed to combine the signals after amplitude and phase adjustment in multipliers 601 and 602 and transmit the combined signals to the RF module 200.
  • the combination module 610 can be realized through an adder.
  • the input of the RF modules 621 and 622 are respectively connected with the two antennas 100 and 101, to amplify and down-convert the received RF signals from side paths and convert them into analog baseband signals.
  • the DAC modules 651 and 652 will respectively convert the two sets of weight coefficients generated by the weight-generating module 640 to analog quantity and perform amplitude and phase adjustment respectively on radio frequency signals through the two multipliers 601 and 602 according to the two sets of analog weight coefficients.
  • the signal combination operation executed by the MA module 600 in this embodiment can be carried out with Blind Equal - Ratio - Combining method (BERC). Since existing technologies offer many ways for realizing Blind Equal-Ratio-Combining method, the following is only a simple introduction of its working process.
  • one of the signals from the two antennas 100 and 101 is chosen as reference signal. For example, if the signal from antenna 100 is chosen as reference signal Sr, then the signal from antenna 101 is the. other signal So.
  • the weight-generating module 640 will estimate the amplitude difference and phase difference between digital baseband signals corresponding to the reference signal Sr and the other signal So drawn via side path.
  • the corresponding weight coefficients can be obtained by normalizing the multiplication of the reference signal Sr by the conjugate signals of the other signal So.
  • the amplitude and phase compensation of the other signal So in respect to the reference signal Sr can be realized in multiplier 602 by multiplying the other signal So by the analog value of the weight coefficient converted by the DAC module 651.
  • the output signals of the multipliers 601 and 602 are added together in the adder 610, for combining the reference signal Sr and other signal So into a single signal in the RF band. . . .
  • the signal combination operation in the MA module 600 can be executed with the techniques of
  • the methods of Blind Equal-Ratio-Combining and Maximum-Ratio-Combining can be realized by both computer software and hardware.
  • the above description indicates that the MA module 600 is a separate module in the embodiment. It doesn't need any feedback signals from the baseband signal processing section. It can realize the combination of multiple RF signals by estimating the parameters contained in the received multiple RF signals.
  • This solution simplifies the system design by adding directly additional antennas and an independently designed MA module 600 into a standard single-antenna mobile terminal to upgrade it into a multiple-antenna mobile terminal. However, this solution totally relies on weight coefficients used for adjusting amplitude and phrase by calculating the received multiple RF signals, which will complicate the design of its weight-generating module 640.
  • Fig. 4 is a block diagram of another embodiment of the receiving means of a multiple-antenna mobile terminal of a TD - SCDMA system.
  • Fig. 5 is the equivalent structure diagram of the MA module 600' of the receiving means in Fig. 4. ⁇ This embodiment is distinguished from the formepembodiment in the point that in this embodiment the MA module 600' realizes the combination operation of multiple RF signals according to the MA control information that is transmitted from the baseband processing module through control bus.
  • the MA control information transmitted to MA module 600' through control bus may include, but not limited to, enabling signal, algorithm selection signal, downlink pilot frequency information and training sequence.
  • the function of an enabling signal is to enable the MA module 600'.
  • the function of algorithm selection signal is to tell MA module 600' which weight algorithm to select.
  • MA control information can be transmitted to the MA module 600' through control bus or other interfaces.
  • the MA module 600' in this embodiment is different from the MA module 600 of the former case in the following points. Firstly, its weight-generating module 640' takes the information such as user-specific training sequence contained in MA control information from the baseband processing module as reference signals, instead of the channel parameters of signals ( Sr, So), and calculates the corresponding weights according to regular weight algorithm designated by MA control information. After the weights are converted through the DAC modules 651 and 652, they are transmitted to the two multipliers 602 and 601 for signal weight adjustment. Since MA control information is provided only once through control bus when the MA module starts working, no dynamic feedback signals from the baseband physical layer processing module 400 are needed.
  • the MA module 600' of this embodiment employs a simpler and quicker approach by utilizing the known information, such as training sequence, to generate weights.
  • both the two embodiments of this invention given above take the dual- antenna receiving apparatus as example, the designing approaches are applicable to receiving apparatus with more than two antennas as well.
  • this invention only introduces embodiments of the multiple-antenna receiving apparatus of mobile telephone and its techniques, due to the symmetry between up-link and downlink, similar solutions can be applied to the design of transmitting device and its method. For instance, in a transmitting apparatus with two antennas, the signal processing procedure is reverse to that in a receiving device. AU that needs to be done is to replace the combination module 610 of MA module 600 or 600' with a separation module (such as signal splitter, not shown in the drawing) to separate single RF signals into two RF signals and send them out after weighting them respectively.
  • a separation module such as signal splitter, not shown in the drawing
  • the incorporation of multi-antenna into wireless communication apparatus can be realized by simply inserting a MA module into the single- antenna wireless communication devices without much modification to the hardware and software design of existing mobile telephones.
  • the multiple-antenna wireless communication apparatus and its method offered by the present invention are not limited to mobile telephone systems. They can also be applied to other wireless communication apparatus such as wireless communication base stations, wireless LAN terminals and so on.
  • the multiple-antenna wireless communication apparatus and method offered by this invention should not be confined to the TD - SCDMA system, they can also be applied to cellular communication systems such as GSM (Global Mobile System), GPRS (General Packet Radio Service) , EDGE
  • GSM Global Mobile System
  • GPRS General Packet Radio Service
  • EDGE EDGE
  • CDMA IS95 CDMA 2000 Standard
  • CDMA 2000 Standard CDMA 2000 Standard

Landscapes

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

Abstract

L'invention concerne un dispositif de transmission sans fil et un procédé associé. Le dispositif de transmission sans fil comprend: de multiples antennes, un module de traitement de signaux d'antennes multiples, un module de traitement de signaux RF et un module de traitement de bande de base. Le module de traitement de signaux d'antennes multiples est conçu pour combiner de multiples signaux RF provenant des multiples antennes de manière à former un signal RF unique. Le module de traitement de signaux RF est conçu pour convertir le signal RF unique combiné en un signal de bande de base unique. Le module de traitement de bande de base est conçu pour mettre en oeuvre un traitement de bande de base sur le signal de bande de base unique. Ce dispositif de transmission sans fil permet de former un système à antennes multiples, par la simple insertion d'un module de traitement de signaux d'antennes multiples dans un système caractéristique à antenne unique. Les modules de traitement de signaux RF et de traitement de bande de base d'un système existant à antenne unique restent inchangés, ce qui simplifie considérablement le processus de reformulation et permet de réduire les difficultés de conception ainsi que les coûts d'installation.
EP05776345A 2004-09-10 2005-09-01 Dispositif de transmission sans fil comportant de multiples antennes et procede associe Withdrawn EP1792418A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200410079138 2004-09-10
PCT/IB2005/052865 WO2006027728A2 (fr) 2004-09-10 2005-09-01 Dispositif de transmission sans fil comportant de multiples antennes et procede associe

Publications (1)

Publication Number Publication Date
EP1792418A2 true EP1792418A2 (fr) 2007-06-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP05776345A Withdrawn EP1792418A2 (fr) 2004-09-10 2005-09-01 Dispositif de transmission sans fil comportant de multiples antennes et procede associe

Country Status (3)

Country Link
EP (1) EP1792418A2 (fr)
JP (1) JP2008512921A (fr)
WO (1) WO2006027728A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2436471B (en) * 2003-05-19 2008-02-13 Fidelity Comtech Inc Bi-directional vector modulator
CN101572555B (zh) * 2008-04-30 2013-01-09 太瀚科技股份有限公司 具有多处理单元的天线信号处理装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6172970B1 (en) * 1997-05-05 2001-01-09 The Hong Kong University Of Science And Technology Low-complexity antenna diversity receiver
US7039135B2 (en) * 2001-10-11 2006-05-02 D.S.P.C. Technologies Ltd. Interference reduction using low complexity antenna array
CN100576772C (zh) * 2002-12-27 2009-12-30 Nxp股份有限公司 具有智能天线的移动终端及其方法
CN100492937C (zh) * 2002-12-27 2009-05-27 Nxp股份有限公司 具有多天线的移动终端及其方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006027728A3 *

Also Published As

Publication number Publication date
JP2008512921A (ja) 2008-04-24
WO2006027728A2 (fr) 2006-03-16
WO2006027728A3 (fr) 2006-08-31

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