WO2012152034A1 - Module radiofréquence à deux modes, procédé d'émission et de réception radiofréquence à deux modes, et terminal utilisateur. - Google Patents

Module radiofréquence à deux modes, procédé d'émission et de réception radiofréquence à deux modes, et terminal utilisateur. Download PDF

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Publication number
WO2012152034A1
WO2012152034A1 PCT/CN2011/084688 CN2011084688W WO2012152034A1 WO 2012152034 A1 WO2012152034 A1 WO 2012152034A1 CN 2011084688 W CN2011084688 W CN 2011084688W WO 2012152034 A1 WO2012152034 A1 WO 2012152034A1
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WO
WIPO (PCT)
Prior art keywords
gsm
signal
radio frequency
mode
dual
Prior art date
Application number
PCT/CN2011/084688
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English (en)
Chinese (zh)
Inventor
郎剑伟
Original Assignee
中兴通讯股份有限公司
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.)
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Publication of WO2012152034A1 publication Critical patent/WO2012152034A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • H04B1/0053—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
    • H04B1/006—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using switches for selecting the desired band
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Definitions

  • Dual-mode RF module dual-mode RF transmitting and receiving method, and user terminal
  • the present invention relates to mobile communication technologies, and more particularly to radio frequency modules, radio frequency receiving, transmitting methods, and user terminals.
  • Scenery technology relates to mobile communication technologies, and more particularly to radio frequency modules, radio frequency receiving, transmitting methods, and user terminals.
  • Time division synchronous CDMA (TD-SCDMA), referred to as TD, is one of the three mainstream standards of 3G, integrating time division duplex (TDD) and code division multiple access (CDMA, Code Division).
  • TDD time division duplex
  • CDMA code division multiple access
  • the technical advantages of Multiple Acess), flexible air interface, and advanced technologies such as smart antenna and joint detection make TD-SCDMA highly advanced in technology and have the highest spectral efficiency among the three standards. With the gradual resolution of problems such as large-scale coverage and high-speed mobility, TD-SCDMA will become a satisfactory 3G solution at the most economical cost.
  • the TD-SCDMA system can use the following frequency bands:
  • frequency bands are determined by the relevant competent authorities. At present, the frequency bands used on the user terminal are 1880-1920 MHz and 2010-2025 MHz, and two time slots are transmitted and received in a row, so that TD-requires four radio frequency switching paths.
  • TDMA Time Division Multiple Access
  • GSM Global System for Mobile Communications
  • the currently used GSM can provide voice and low-speed data services, can basically meet the needs of people's information exchange, and still occupy a mainstream position in mobile communications.
  • the commonly used frequency bands for GSM are 850MHz, 900MHz and 1800MHz, and 1900MHz. Since the power amplifiers (PAs) have similar frequency bands, the 850MHz and 900MHz transmissions can share one path. The 1800MHz and 1900MHz transmissions can share one channel, but the reception needs to be independent of each other. Therefore, GSM needs to have six RF switching paths.
  • the current dual-mode user terminals are divided into a single-antenna mode and a dual-antenna mode.
  • a single-card single-standby user terminal selects a single-antenna mode, and the single-antenna mode necessarily involves a relatively complicated RF path switching, that is, An RF front-end connection system completes the entire process from single antenna to RF transceiver.
  • Figure 1 shows the structure of the existing dual-mode RF module.
  • the RF front-end switch design of the dual-mode user terminal uses a 9-channel antenna switch plus a two-way switch to transmit and receive each frequency band.
  • the GSM RF transceiver sends GSM850/900MHz, GSM1800/1900MHz signals to a 9-channel antenna switch via a GSM PA.
  • the GSM RF Transceiver receives GSM850/900/1800/1900MHz signals through a Saw filter, while the TD RF Transceiver passes two Road Saw filter, a two-way switch, a TD PA sends TD1900/TD2000MHz signals, and the TD RF Transceiver receives TD1900/TD2000MHz signals through a Saw filter.
  • the above method can realize 10 signal switching.
  • General purpose input and output (GPIO) interface is in the system In the signal control port, a set of GPIO interfaces is usually used in the RF front end to implement various logic control. In the above scheme, the 9-channel antenna switch needs to use 4 GPIO ports to implement 9 switching logics of the path. .
  • the 9-channel antenna switch used is relatively expensive due to less production.
  • the scheme is used to control the general-purpose input and output of the RF device.
  • the GPIO interface is used more, which is a waste of resources in the context of the GPIO resource shortage of the user terminal system. Summary of the invention
  • the technical problem solved by the technical solution of the present invention is to provide a dual-mode RF module, a dual-mode RF receiving and transmitting method, and a user terminal to optimize the RF front-end design, save costs, and improve resource utilization.
  • the present invention provides a dual mode radio frequency module, including a GSM radio frequency transceiver and a TD-SCDMA radio frequency transceiver, all connected to an antenna, wherein a 4-channel antenna switch is connected to a GSM radio frequency front end, and a GSM radio frequency front end is connected to a GSM.
  • the RF transceiver is used to transmit signals; the GSM RF front end is connected to two single-pole double-throw RF switches, and the GSM RF transceiver is connected through the sound table filter to receive signals; or, the GSM RF front end is connected to two single-input and double-out sound meters.
  • the filter is connected to the GSM radio frequency transceiver through two single-input and double-out type sound meter filters to receive signals; wherein the GSM radio frequency front end includes: a low frequency transmitting end, a high frequency transmitting end, a low frequency receiving end, and a high frequency Receiving end.
  • the GSM radio frequency front end is a GSM dual frequency amplifier PA.
  • the GSM dual frequency PA is connected to one of the four channel antenna switches.
  • the TD-SCDMA radio frequency transceiver is connected to two acoustic table filters, and is connected to a 4-way antenna switch through a two-way switch and a TD-SCDMA PA to transmit a signal; the TD- The SCDMA RF transceiver connects the 4-channel antenna switch through a sound meter filter to receive the signal.
  • the invention also provides a user terminal comprising the above dual mode radio frequency module.
  • the present invention also provides a dual mode radio frequency transmitting method, which is applied to a GSM mode; the dual mode radio frequency transmitting method includes:
  • the GSM RF transceiver transmits the signal to the GSM RF front end, controls the GSM RF front end to be in the transmit mode, the GSM front end outputs the amplified signal to the 4-channel antenna switch, controls the 4-channel antenna switch to the GSM mode, and outputs the signal to the antenna.
  • the present invention further provides a dual mode radio frequency receiving method, which is applied to the GSM mode;
  • the dual mode radio frequency receiving method includes:
  • the antenna After receiving the signal, the antenna is connected to the 4-channel antenna switch, the 4-channel antenna switch is placed in the GSM mode, and the received signal is output to the GSM RF front end, and the GSM RF front-end output signal is sent to the single-pole double-throw RF switch;
  • the single-pole double-throw RF switch After receiving the signal, the single-pole double-throw RF switch outputs the signal to the corresponding sound table filter according to the frequency band of the signal;
  • the SAW filter sends the signal to the GSM RF transceiver.
  • the GSM RF front-end output signal to the single-pole double-throw RF switch is: if the cell is in the 850 MHz or 900 MHz band, the GSM RF front end is placed in the low frequency receiving mode, and the signal is output from the low frequency receiving end to the corresponding single knife. Double-throw RF switch; If the cell is in the 1800MHZ or 1900MHZ band, the GSM RF front-end is placed in the high-frequency receive mode, and the signal is output from the high-frequency receiver to the corresponding single-pole, double-throw RF switch.
  • the single-pole double-throw RF switch After receiving the signal, the single-pole double-throw RF switch outputs a signal to the corresponding sound table filter according to the frequency band of the signal, which is:
  • the single-pole double-throw RF switch After receiving the signal from the low-frequency receiving end, the single-pole double-throw RF switch determines whether the signal frequency band is 850MHz or 900MHz, and controls the single-pole double-throw RF switch output to the 850MHz SAW filter or 900MHz SAW filter; the single-pole double-throw RF switch from After receiving the signal, the high frequency receiving end determines whether the frequency band of the signal is 1800MHz or 1900MHz, and controls the single-pole double-throw RF switch output to 1800MHz SAW filter or 1900MHz SAW filter.
  • the present invention also provides another dual mode radio frequency receiving method, which is applied to the GSM mode; the dual mode radio frequency receiving method includes:
  • the antenna After receiving the signal, the antenna is connected to the 4-channel antenna switch, and the 4-channel antenna switch is placed in the GSM mode, and the received signal is output to the GSM radio frequency front end.
  • the GSM radio frequency front end if the cell is in the 850MHz or 900MHz frequency band, the GSM radio frequency front end is placed in the low frequency. In the receiving mode, the signal is output from the low frequency receiving end to the corresponding single input and double output sound filter; if the cell is in the 1800MHz or 1900MHz frequency band, the GSM RF front end is placed in the high frequency receiving mode, and the signal is output from the high frequency receiving end to Corresponding single-input and double-out sound meter filters;
  • the single-input and double-outphone filters distinguish signals of different frequency bands and send the signals to the GSM radio transceiver.
  • the switch circuit is newly built by introducing a new radio frequency device, and the original front end antenna switch can be replaced with a 4-way switch, instead of a 4-way switch, which saves the design cost of the hardware;
  • a single-input and double-out type acoustic table filter is adopted, wherein the 4-channel antenna switch requires two GPIO ports to realize four switching logics, and the GSM RF front-end A GPIO port is required to judge low-frequency reception and high-frequency reception.
  • the whole solution requires three GPIO ports to support, saving one GPIO port compared with the original solution.
  • Figure 1 is a structural diagram of a conventional dual mode RF module
  • Figure 2 is a structural view of a first embodiment of the present invention
  • Figure 3 is a structural view of a second embodiment of the present invention. detailed description
  • a dual mode radio frequency module is provided, wherein, on the TD mode side, the TD radio frequency Transceiver connects two Saw filters, through a dual switch, and a TD PA. Connected to the 4-channel antenna switch to transmit the TD1900/TD2000MHz signal. The TD RF Transceiver connects the 4-channel antenna switch through a Saw filter to receive the TD1900/TD2000MHZ signal. Due to the dual-switch function, three of the 4-channel antenna switches are required.
  • the RF module includes: 4-channel antenna switch, GSM RF front-end, two single-pole double-throw RF switches, four single-input and single-out Saw filters, and GSM RF Transceiver, where GSM RF front-end includes GSM dual-band PA, the GSM radio frequency front end can support two-way transmission and two-way reception of GSM; wherein, the two-way transmission refers to: low-frequency transmitting end and high-frequency transmitting end transmitting, the two-way receiving means: low-frequency receiving end and In the RF module, the 4-channel antenna switch is connected to the GSM dual-band PA. On the transmitting side, the GSM dual-band PA is connected to the GSM RF Transceiver.
  • the GSM dual-band PA is connected to two single-pole double-throw RF switches. Separate the GSM850MHZ signal reception from the GSM900MHz signal reception, separate the GSM1800MHz signal reception from the GSM1900MHz signal reception, and connect the GSM RF Transceive through four single-input and single-out Saw filters. Because of the GSM dual-frequency PA, one of the 4-way antenna switches is required.
  • FIG. 3 it is a structural diagram of a second embodiment of the present invention, and provides a dual mode radio frequency module, wherein the TD mode is the same as that in the first embodiment;
  • the radio frequency module includes: a 4-channel antenna switch, a GSM radio frequency front end, two single-input and double-out Saw filters, and a GSM radio frequency Transceiver, wherein the GSM radio frequency front end includes a GSM dual-frequency PA, and the GSM radio frequency front end can be Supporting two-way transmission and two-way reception of GSM; wherein, the two-way transmission refers to: a low-frequency transmitting end and a high-frequency transmitting end transmitting, and the two ⁇ 3 ⁇ 4 wife receiving means: the low-frequency receiving end and the high-frequency receiving end receiving;
  • the 4-channel antenna switch is connected to the GSM dual-band ⁇ .
  • the GSM dual-band ⁇ connects to the GSM RF Transceiver; on the receiving side, the GSM dual-frequency PA connects two single-input and double-out Saw filters, through the two Single-input and double-out Saw filter connects to GSM RF Transceiver Due to GSM dual-frequency PA, one of the 4-way antenna switches is required.
  • a single-input and double-out Saw filter is responsible for separating the reception of the GSM850MHz signal from the reception of the GSM900MHz signal.
  • the other single-input and double-out Saw filter is responsible for separating the reception of the GSM1800MHz signal from the reception of the GSM1900MHz signal.
  • the first input frequency range is 850-900MHZ
  • the output frequency band range is 850MHz at one end, and the other end is 900MHz
  • the second input frequency band ranges from 1800-1900MHZ
  • the output frequency band range is 1800MHz at one end and 1900MHz at the other end.
  • a third embodiment of the present invention provides a dual-mode radio frequency receiving and transmitting method, which is based on the dual-mode radio frequency module of the first embodiment, and includes:
  • the dual-mode RF transmission method is:
  • the signal transmission path is connected, and the transmitting signal is sent out from the RF Transceiver through the GSM radio frequency front end.
  • the GSM radio frequency front end is controlled to be in the transmitting mode, and the GSM dual-frequency PA output is amplified to the 4-channel antenna switch.
  • the 4-channel antenna switch is controlled to The GSM mode thus outputs a signal to the antenna.
  • the dual mode RF receiving method is:
  • the signal receiving path is connected, and the signal is introduced from the antenna, first to the 4-channel antenna switch.
  • the 4-channel antenna switch is placed in the GSM mode, and the received signal is output to the GSM radio frequency front end.
  • the GSM radio frequency front end is placed in the low frequency receiving mode, and the signal is received from the low frequency receiving end.
  • Output to a single pole double throw RF switch if in the 1800MHz or 1900MHz frequency band, the GSM RF front end is placed in the high frequency receiving mode, and the signal is output from the high frequency receiving end to another single pole double throw RF switch;
  • the frequency band of the signal is judged to be 850MHz or 900MHz, and the single-pole double-throw RF switch is controlled to output to a 850MHz Saw filter or a 900MHz Saw filter;
  • the frequency band of the signal is judged to be 1800MHz or 1900MHz, and the single-pole double-throw RF switch is controlled to output to the 1800MHz Saw filter or 1900MHZ Saw filter;
  • the dual-mode RF transmission method is:
  • the signal transmission path is connected, and the 4-channel antenna switch is directly controlled in the TD transmission mode, and the signal is sent to the antenna terminal by the 4-way switching switch.
  • the dual mode RF receiving method is:
  • the signal receiving path is connected. At this time, the signal is judged to be in the 2000MHz band or the 1900MHz band.
  • the 4-way switch directly controls the antenna signal to be sent to the 2000MHZ band or the 1900MHz band.
  • the Saw filter sends the received signal to the TD RF transceiver.
  • the fourth embodiment of the present invention provides a dual-mode radio frequency receiving and transmitting method, which is based on the dual-mode radio frequency module of the second embodiment, and includes:
  • the dual mode RF receiving method is:
  • the signal receiving path is connected, and the signal is introduced from the antenna, first to the 4-channel antenna switch.
  • the 4-channel antenna switch is placed in the GSM mode, and the received signal is output to the GSM radio frequency front end.
  • the GSM RF front end is placed in the low frequency receiving mode, and the signal is output from the low frequency receiving end to a single input and double output type Saw filter; Passing through the 1800MHz or 1900MHz frequency band, the GSM RF front end is placed in the high frequency receiving mode, and the signal is output from the high frequency receiving end to another single input and double output type Saw filter;
  • Receive signal switching, single-input and double-out Saw filter directly distinguishes signals in different frequency bands and sends the signals to GSM RF Transceiver

Abstract

La présente invention concerne un module radiofréquence à deux modes, comprenant un émetteur-récepteur radiofréquence GSM et un émetteur-récepteur radiofréquence TD qui sont connectés à une antenne. Un commutateur d'antenne quatre canaux est connecté à un frontal radiofréquence GMS. Le frontal radiofréquence GSM est connecté à l'émetteur-récepteur radiofréquence GSM pour émettre un signal. Le frontal radiofréquence GSM est connecté à deux commutateurs radiofréquence unipolaires bidirectionnels et connecté à l'émetteur-récepteur radiofréquence GSM par l'intermédiaire de filtres à ondes acoustiques de surface (SAW) pour recevoir un signal. Dans une variante, le frontal radiofréquence GSM est connecté à deux filtres SAW une entrée deux sorties et connecté à l'émetteur-récepteur radiofréquence GMS par l'intermédiaire de deux filtres SAW une entrée deux sorties pour recevoir un signal. Le frontal radiofréquence GSM comprend : une extrémité émettrice basse fréquence, une extrémité émettrice haute fréquence, une extrémité réceptrice basse fréquence et une extrémité réceptrice haute fréquence. La présente invention concerne également un procédé d'émission et de réception radiofréquence et un terminal utilisateur. La solution technique selon la présente invention permet de réduire le coût de conception du matériel et d'améliorer l'utilisation des ressources.
PCT/CN2011/084688 2011-09-23 2011-12-26 Module radiofréquence à deux modes, procédé d'émission et de réception radiofréquence à deux modes, et terminal utilisateur. WO2012152034A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110286622.1 2011-09-23
CN201110286622.1A CN102332929B (zh) 2011-09-23 2011-09-23 双模射频模块、双模射频发送、接收方法以及用户终端

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WO2012152034A1 true WO2012152034A1 (fr) 2012-11-15

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CN (1) CN102332929B (fr)
WO (1) WO2012152034A1 (fr)

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