WO2011066766A1 - Multi-mode radio frequency interface - Google Patents

Multi-mode radio frequency interface Download PDF

Info

Publication number
WO2011066766A1
WO2011066766A1 PCT/CN2010/077964 CN2010077964W WO2011066766A1 WO 2011066766 A1 WO2011066766 A1 WO 2011066766A1 CN 2010077964 W CN2010077964 W CN 2010077964W WO 2011066766 A1 WO2011066766 A1 WO 2011066766A1
Authority
WO
WIPO (PCT)
Prior art keywords
radio frequency
analog
signal
unit
digital
Prior art date
Application number
PCT/CN2010/077964
Other languages
French (fr)
Chinese (zh)
Inventor
田名东
王吉文
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.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2011066766A1 publication Critical patent/WO2011066766A1/en

Links

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
    • H04B1/0067—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 one or more circuit blocks in common for different bands
    • 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
    • H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
    • H04B1/0028—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at baseband stage
    • H04B1/0032—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at baseband stage with analogue quadrature frequency conversion to and from the baseband
    • 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
    • H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
    • H04B1/0028—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at baseband stage
    • H04B1/0035—Channel filtering, i.e. selecting a frequency channel within a software radio system
    • 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
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/403—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency
    • H04B1/406—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency with more than one transmission mode, e.g. analog and digital modes

Definitions

  • the present invention relates to the field of mobile communication technologies, and in particular, to a multimode radio frequency interface.
  • Mobile communication technologies are developing at a high speed, and technical standards for 2G, 3G, and LTE are constantly being proposed, and the development of mobile terminals is rapidly changing with the development of the above technologies.
  • mobile terminals appear in 2G, 3G single-mode or dual-mode mobile communication modes, and there is no support for 2G/3G/TD-LTE multimode mode terminals.
  • the baseband of the terminal can support multiple modes, but the RF does not support the single-chip solution of multiple modes, or the interface between the various RF subsystems is not uniform, if there are so many RF subsystems of 4 bar
  • the baseband chip is connected, the signal line is too much, and the analog signal has high requirements on the anti-interference ability of the line, and the implementation is difficult.
  • Figure 1 it is a schematic diagram of common multimode RF architecture and interfaces. The interfaces of the various RF systems are simultaneously connected to the baseband. The inconsistent interface format causes the baseband to be complex and difficult to process when transmitting data through the interface.
  • the present invention provides a multi-mode RF interface for solving the problem of baseband processing, large number of analog signal IQ traces, and signals between traces when a multimode RF system is simultaneously connected to a baseband in the prior art. Mistakes and other issues.
  • the present invention provides a multi-mode radio frequency interface, which is applied in a system including a digital baseband unit and a multi-mode radio frequency unit, where the multi-mode radio frequency unit includes a plurality of radio frequency units corresponding to a plurality of communication modes.
  • the multimode radio frequency interface includes: a channel gating module and a signal processing module; the channel gating module has one end connected to the multimode radio unit and the other end connected to the signal processing module for receiving the signal processing module or When an analog IQ signal sent by a radio frequency unit in the multi-mode radio unit is closed, the corresponding channel switch is closed, and the analog IQ signal is forwarded;
  • the signal processing module has one end connected to the channel gating module and the other end connected to the digital baseband unit for performing analog or digital mode on an IQ signal exchanged between the channel gating module and the digital baseband unit. Conversion processing.
  • the channel gating module when receiving an analog IQ signal sent by a radio frequency unit of the multi-mode radio frequency unit, closes a channel switch corresponding to the radio frequency unit that sends the analog IQ signal, and forwards the analog IQ Transmitting to the signal processing module; when receiving the analog IQ signal sent by the signal processing module, closing a channel switch corresponding to the radio frequency unit indicated by the destination address of the analog IQ signal, and forwarding the analog IQ signal to the The RF unit indicated by the analog IQ signal.
  • the signal processing module includes: an A/D (Analog/Digital) conversion module and a D/A (Digital/Analog) conversion module; the A/D conversion module is configured to receive an analog IQ sent by the channel gating module a signal, the analog IQ signal is converted to a digital IQ signal and sent to the digital baseband unit; the D/A conversion module is configured to receive a digital IQ signal sent by the digital baseband unit, and the digital IQ signal After being converted into an analog IQ signal, it is sent to the channel gating module. Further, the multimode radio frequency interface is disposed on the multimode radio unit side.
  • the utility model has the following beneficial effects:
  • the multi-mode radio frequency interface provided by the utility model simplifies the baseband interface and becomes a digital parallel port; shortens the trace distance of sensitive signals such as analog IQ signals, and reduces the design requirements.
  • the number of interfaces of the switch module in the analog baseband can be expanded, as long as the RF mode of the analog IQ interface scheme can be accessed, the simplification of the RF and baseband interfaces is truly realized.
  • FIG. 1 is a schematic diagram of a multimode radio frequency architecture and interface in the prior art
  • 2 is a structural diagram of a multimode radio frequency interface provided by the present invention
  • FIG. 3 is a structural block diagram of a multimode radio frequency interface application system provided by the present invention.
  • the multi-mode radio frequency platform provides a multi-mode radio frequency interface, and the multi-mode radio frequency interface is applied in a system including a digital baseband unit and a multi-mode radio unit, and the multi-mode radio unit includes multiple corresponding to multiple communication modes. Radio units.
  • the communication modes may be: WCDMA, TD-SCDMA, LTE, and GSM.
  • the structure diagram of the multimode radio frequency interface specifically includes: a channel gating module 210 and a signal processing module 220; wherein, the channel gating module 210 is connected to the multimode radio unit.
  • the other end is connected to the signal processing module 220, and is configured to: when receiving the analog IQ signal sent by the signal processing module 220 or a radio frequency unit of the multi-mode radio frequency unit, close the corresponding channel switch, and forward the analog IQ signal;
  • the signal processing module 220 is connected to the channel gating module 210, and the other end is connected to the digital baseband unit for performing analog-to-digital or digital-to-analog conversion processing on the IQ signal exchanged between the channel gating module 210 and the digital baseband unit.
  • the channel gating module 210 when receiving an analog IQ signal sent by a radio frequency unit, close the channel switch corresponding to the radio frequency unit, and forward the analog IQ signal to the signal processing module 220; Upon receiving the analog IQ signal sent by the signal processing module 220, the corresponding radio frequency unit is determined according to the destination address of the analog IQ signal, the channel switch corresponding to the radio frequency unit is closed, and the analog IQ signal is forwarded to the radio frequency unit. .
  • the signal processing module 220 specifically includes: an A/D conversion module 221 and a D/A conversion module 222; wherein, the A/D conversion module 221 is configured to receive an analog IQ signal sent by the channel gating module 210, and the analog IQ is The signal is converted to a digital IQ signal and sent to the digital baseband unit;
  • the D/A conversion module 222 is configured to receive the digital IQ signal sent by the digital baseband unit, convert the digital IQ signal into an analog IQ signal, and send the digital IQ signal to the channel gating module 210.
  • the multimode radio frequency interface provided by the present invention is preferably disposed on the multimode radio unit side. As shown in FIG. 3, the system structure diagram of the multimode radio frequency interface provided in the utility model is arranged on the side of the multimode radio unit. As shown in FIG.
  • the multimode radio frequency interface is located between the multimode radio unit and the digital baseband unit, and the radio channel unit of different communication modes is automatically switched by the channel gating module in the interface, and then sent to the signal processing module for processing.
  • the resulting unified interface is sent to the digital baseband unit.
  • the radio frequency unit and the antenna in the multi-mode radio unit are connected by an antenna switch to switch between different frequency bands.
  • the multimode radio unit includes the radio unit of the LTE communication mode
  • MIMO Multiple-Input Multiple-Out-put
  • all mode RF units each use the existing RF platform.
  • the frequency band switch SW1 and the antenna ⁇ 1 are uniformly connected to the transmitting and receiving paths.
  • Antenna SW2 and switch ⁇ 2 provide receive diversity for LTE MIMO.
  • the RF hardware portion can be the same as the multimode system of the prior art (as described in the background section), and a multimode RF interface is added.
  • the main innovation of the utility model lies in that the simulated baseband portion is arranged on the multi-mode radio unit side, and the channel gating module is used to switch the IQ signals of different modes, and the unified digital parallel port signal is output. As long as there are enough pin pins of the channel gating module, this solution can be used to realize the interface unification between multiple radio modes, and realize the multi-mode radio solution under the existing conditions.
  • the existing baseband chip cannot provide an interface form supporting the existing different radio frequency modes.
  • the radio frequency and baseband interface are simplified, and the baseband only needs to execute one interface.
  • Different RF mode interface switching can be done by analog switch modules in the analog baseband.
  • the multi-mode RF interface solution provided by the utility model simplifies the baseband interface and becomes a digital parallel port; shortens the trace distance of sensitive signals such as analog IQ signals, and reduces the design Counting requirements and signal interference.
  • the number of switches of the multi-way switch module can be expanded, as long as the RF mode of the analog IQ interface solution can be accessed, the RF and baseband interfaces can be realized.

Abstract

A multi-mode radio frequency interface is disclosed in the present invention, which is used in a system including a digital baseband unit and a multi-mode radio frequency unit. The multi-mode radio frequency unit comprises a plurality of radio frequency units corresponding to numerous communication modes. The multi-mode radio frequency interface includes a channel gating module (210) and a signal processing module (220). The channel gating module (210), whose one end is linked with the multi-mode radio frequency unit and another end is linked with the signal processing module (220), is used for closing a corresponding channel switch while receiving an analog IQ signal sent by the signal processing module (220) or a certain radio frequency unit, and forwarding the analog IQ signal. The signal processing module (220), whose one end is linked with the channel gating module (210) and another end is linked with the digital base band unit, is used for performing analog-to-digital or digital-to-analog conversion on signals interacted between the channel gating module (210) and the digital baseband unit. With the present invention, the baseband interface is simplified; the wiring distance of the sensitive signals, such as analog IQ signal, is reduced; the radio frequency interface and baseband interface are simplified truly.

Description

一种多猜频接口 技术领域 本实用新型涉及移动通信技术领域， 尤其涉及一种多模射频接口。 背景技术 移动通信技术高速发展， 2G、 3G以及 LTE的技术标准不断被提出， 移 动终端的发展也随着上述技术的发展日新月异。 目前， 移动终端是以 2G、 3G 单模或双模的移动通信模式出现的，尚无支持 2G/3G/TD-LTE多模模式终端。 主要的原因在于终端的基带可以支持多模式， 但射频还没有支持多种模式的 单芯片方案， 或者是目前各个射频子系统之间的接口 艮不统一， 如果 4巴这么 多的射频子系统全部接入基带芯片， 那么信号线太多， 同时模拟信号对线路 的抗千扰能力要求很高， 实现困难。 如图 1所示， 为常见多模射频架构和接口示意图。 各个射频系统的接口 同时接入到基带上。 因接口形式不一致， 导致基带在通过接口传输数据时， 实现复杂， 处理困难。 同时， 模拟信号 IQ ( In-phase and Quadrature, 同相正 交）走线数量巨大， 在实现如此多的模拟信号走线时也非常困难， 且要求 IQ 的接口数量非常巨大。一旦射频釆用另外的不同接口，原有基带将不能支持。 实用新型内容 本实用新型提供一种多模射频接口， 用以解决现有技术中多模射频系统 同时接入基带时， 产生的基带处理困难、 模拟信号 IQ 走线数量巨大以及走 线间存在信号千扰等问题。 具体的， 本实用新型提供的一种多模射频接口， 应用在包括数字基带单 元和多模射频单元的系统中， 所述多模射频单元包括与多个通信模式对应的 多个射频单元， 所述多模射频接口包括： 通道选通模块和信号处理模块； 所述通道选通模块， 一端与多模射频单元相连， 另一端与信号处理模块 相连， 用于在接收到所述信号处理模块或多模射频单元中的某个射频单元发 送的模拟 IQ信号时， 闭合对应的通道开关， 并转发所述模拟 IQ信号； 所述信号处理模块， 一端与所述通道选通模块相连， 另一端与所述数字 基带单元相连， 用于对所述通道选通模块和数字基带单元间交互的 IQ 信号 进行模数或数模转换处理。 其中， 所述通道选通模块， 在接收到多模射频单元的某个射频单元发送 的模拟 IQ信号时，将与发送该模拟 IQ信号的射频单元对应的通道开关闭合， 并转发所述模拟 IQ 信号至所述信号处理模块； 在接收到所述信号处理模块 发送的模拟 IQ信号时， 将所述模拟 IQ信号目的地址指示的射频单元所对应 的通道开关闭合， 并转发该模拟 IQ信号至该模拟 IQ信号指示的射频单元。 所述信号处理模块包括： A/D (模拟 /数字）转换模块和 D/A (数字 /模拟） 转换模块； 所述 A/D转换模块， 用于接收所述通道选通模块发送的模拟 IQ信号， 将所述模拟 IQ信号转换为数字 IQ信号后发送至所述数字基带单元； 所述 D/A转换模块， 用于接收所述数字基带单元发送的数字 IQ信号， 将所述数字 IQ信号转换为模拟 IQ信号后发送至所述通道选通模块。 进一步的， 所述多模射频接口布置在所述多模射频单元侧。 本实用新型有益效果如下： 通过本实用新型提供的多模射频接口， 简化了基带接口， 统一成为数字 并口； 缩短了模拟 IQ 信号等敏感信号的走线距离， 降低了设计要求。 同时 因为模拟基带中的开关模组的接口数量可以拓展， 只要是釆用模拟 IQ 接口 方案的射频模式都可以接入， 真正实现了射频、 基带接口的简化。 附图说明 为了更清楚地说明本实用新型实施例或现有技术中的技术方案， 下面将 对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地， 下面描述中的附图仅仅是本实用新型的一些实施例， 对于本领域普通技术人 员来讲， 在不付出创造性劳动性的前提下， 还可以根据这些附图获得其他的 附图。 图 1为现有技术中多模射频架构和接口示意图； 图 2为本实用新型提供的一种多模射频接口的结构图； 图 3为本实用新型提供的多模射频接口应用系统结构框图。 具体实施方式 下面将结合本实用新型实施例中的附图， 对本实用新型实施例中的技术 方案进行清楚、 完整地描述， 显然， 所描述的实施例仅仅是本实用新型一部 分实施例， 而不是全部的实施例。 基于本实用新型中的实施例， 本领域普通 技术人员在没有做出创造性劳动前提下所获得的所有其他实施例， 都属于本 实用新型保护的范围。 为了解决现有技术中由于多模射频系统同时接入基带时， 产生的模拟信 号 IQ 走线数量巨大、 走线间存在信号千扰和基带处理困难的问题， 本实用 新型依据目前现有单模射频平台， 通过接口转换， 提供一种多模射频接口， 该多模射频接口应用在包括数字基带单元和多模射频单元的系统中， 所述多 模射频单元包括与多个通信模式对应的多个射频单元。 其中， 通信模式可以 为： WCDMA、 TD-SCDMA、 LTE和 GSM等。 如图 2所示， 为本实用新型提供的多模射频接口的结构图， 具体包括： 通道选通模块 210和信号处理模块 220; 其中， 通道选通模块 210, —端与多模射频单元相连， 另一端与信号处 理模块 220相连， 用于在接收到信号处理模块 220或多模射频单元中的某个 射频单元发送的模拟 IQ信号时， 闭合对应的通道开关， 并转发该模拟 IQ信 号； 信号处理模块 220 , —端与通道选通模块 210相连， 另一端与数字基带 单元相连， 用于对通道选通模块 210和数字基带单元间交互的 IQ信号进行 模数或数模转换处理。 在具体实现时， 所述通道选通模块 210, 在接收到某个射频单元发送的 模拟 IQ信号时， 将与该射频单元对应的通道开关闭合， 并转发该模拟 IQ信 号至信号处理模块 220; 在接收到信号处理模块 220发送的模拟 IQ信号时， 才艮据模拟 IQ 信号的目的地址确定对应的射频单元， 将与该射频单元所对应 的通道开关闭合， 并转发模拟 IQ信号至该射频单元。 所述信号处理模块 220具体包括： A/D转换模块 221和 D/A转换模块 222 ; 其中， A/D转换模块 221 , 用于接收通道选通模块 210发送的模拟 IQ信 号， 将该模拟 IQ信号转换为数字 IQ信号后发送至数字基带单元； FIELD OF THE INVENTION The present invention relates to the field of mobile communication technologies, and in particular, to a multimode radio frequency interface. BACKGROUND OF THE INVENTION Mobile communication technologies are developing at a high speed, and technical standards for 2G, 3G, and LTE are constantly being proposed, and the development of mobile terminals is rapidly changing with the development of the above technologies. At present, mobile terminals appear in 2G, 3G single-mode or dual-mode mobile communication modes, and there is no support for 2G/3G/TD-LTE multimode mode terminals. The main reason is that the baseband of the terminal can support multiple modes, but the RF does not support the single-chip solution of multiple modes, or the interface between the various RF subsystems is not uniform, if there are so many RF subsystems of 4 bar When the baseband chip is connected, the signal line is too much, and the analog signal has high requirements on the anti-interference ability of the line, and the implementation is difficult. As shown in Figure 1, it is a schematic diagram of common multimode RF architecture and interfaces. The interfaces of the various RF systems are simultaneously connected to the baseband. The inconsistent interface format causes the baseband to be complex and difficult to process when transmitting data through the interface. At the same time, the number of analog signals IQ (In-phase and Quadrature) is huge, and it is very difficult to implement so many analog signal traces, and the number of interfaces requiring IQ is very large. Once the RF is used with a different interface, the original baseband will not be supported. SUMMARY OF THE INVENTION The present invention provides a multi-mode RF interface for solving the problem of baseband processing, large number of analog signal IQ traces, and signals between traces when a multimode RF system is simultaneously connected to a baseband in the prior art. Mistakes and other issues. Specifically, the present invention provides a multi-mode radio frequency interface, which is applied in a system including a digital baseband unit and a multi-mode radio frequency unit, where the multi-mode radio frequency unit includes a plurality of radio frequency units corresponding to a plurality of communication modes. The multimode radio frequency interface includes: a channel gating module and a signal processing module; the channel gating module has one end connected to the multimode radio unit and the other end connected to the signal processing module for receiving the signal processing module or When an analog IQ signal sent by a radio frequency unit in the multi-mode radio unit is closed, the corresponding channel switch is closed, and the analog IQ signal is forwarded; The signal processing module has one end connected to the channel gating module and the other end connected to the digital baseband unit for performing analog or digital mode on an IQ signal exchanged between the channel gating module and the digital baseband unit. Conversion processing. The channel gating module, when receiving an analog IQ signal sent by a radio frequency unit of the multi-mode radio frequency unit, closes a channel switch corresponding to the radio frequency unit that sends the analog IQ signal, and forwards the analog IQ Transmitting to the signal processing module; when receiving the analog IQ signal sent by the signal processing module, closing a channel switch corresponding to the radio frequency unit indicated by the destination address of the analog IQ signal, and forwarding the analog IQ signal to the The RF unit indicated by the analog IQ signal. The signal processing module includes: an A/D (Analog/Digital) conversion module and a D/A (Digital/Analog) conversion module; the A/D conversion module is configured to receive an analog IQ sent by the channel gating module a signal, the analog IQ signal is converted to a digital IQ signal and sent to the digital baseband unit; the D/A conversion module is configured to receive a digital IQ signal sent by the digital baseband unit, and the digital IQ signal After being converted into an analog IQ signal, it is sent to the channel gating module. Further, the multimode radio frequency interface is disposed on the multimode radio unit side. The utility model has the following beneficial effects: The multi-mode radio frequency interface provided by the utility model simplifies the baseband interface and becomes a digital parallel port; shortens the trace distance of sensitive signals such as analog IQ signals, and reduces the design requirements. At the same time, because the number of interfaces of the switch module in the analog baseband can be expanded, as long as the RF mode of the analog IQ interface scheme can be accessed, the simplification of the RF and baseband interfaces is truly realized. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. The drawings in the drawings are only some embodiments of the present invention, and those skilled in the art can obtain other drawings according to the drawings without any inventive labor. 1 is a schematic diagram of a multimode radio frequency architecture and interface in the prior art; 2 is a structural diagram of a multimode radio frequency interface provided by the present invention; and FIG. 3 is a structural block diagram of a multimode radio frequency interface application system provided by the present invention. The technical solutions in the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, instead of All embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts are within the scope of the present invention. In order to solve the problem in the prior art that the multi-mode radio frequency system is simultaneously connected to the baseband, the number of analog signal IQ traces generated is large, the signal interference between the traces is difficult, and the baseband processing is difficult, the utility model is based on the existing single mode. The radio frequency platform provides a multi-mode radio frequency interface, and the multi-mode radio frequency interface is applied in a system including a digital baseband unit and a multi-mode radio unit, and the multi-mode radio unit includes multiple corresponding to multiple communication modes. Radio units. The communication modes may be: WCDMA, TD-SCDMA, LTE, and GSM. As shown in FIG. 2, the structure diagram of the multimode radio frequency interface provided by the present invention specifically includes: a channel gating module 210 and a signal processing module 220; wherein, the channel gating module 210 is connected to the multimode radio unit. The other end is connected to the signal processing module 220, and is configured to: when receiving the analog IQ signal sent by the signal processing module 220 or a radio frequency unit of the multi-mode radio frequency unit, close the corresponding channel switch, and forward the analog IQ signal; The signal processing module 220 is connected to the channel gating module 210, and the other end is connected to the digital baseband unit for performing analog-to-digital or digital-to-analog conversion processing on the IQ signal exchanged between the channel gating module 210 and the digital baseband unit. In a specific implementation, the channel gating module 210, when receiving an analog IQ signal sent by a radio frequency unit, close the channel switch corresponding to the radio frequency unit, and forward the analog IQ signal to the signal processing module 220; Upon receiving the analog IQ signal sent by the signal processing module 220, the corresponding radio frequency unit is determined according to the destination address of the analog IQ signal, the channel switch corresponding to the radio frequency unit is closed, and the analog IQ signal is forwarded to the radio frequency unit. . The signal processing module 220 specifically includes: an A/D conversion module 221 and a D/A conversion module 222; wherein, the A/D conversion module 221 is configured to receive an analog IQ signal sent by the channel gating module 210, and the analog IQ is The signal is converted to a digital IQ signal and sent to the digital baseband unit;
D/A转换模块 222 , 用于接收数字基带单元发送的数字 IQ信号， 将该数 字 IQ信号转换为模拟 IQ信号后发送至通道选通模块 210。 优选地， 为了降低多模射频单元与该多模射频接口的之间的布线， 本实 用新型所提供的多模射频接口较佳的布置在多模射频单元侧。 如图 3所示， 为本实用新型提供的多模射频接口布置在多模射频单元侧 时的系统结构图。 如图 3所示， 多模射频接口位于多模射频单元与数字基带 单元之间， 通过接口内的通道选通模块进行不同通信模式的射频单元的自动 切换， 然后送入信号处理模块进行处理， 最终形成统一的接口送至数字基带 单元。 其中， 多模射频单元内的各射频单元与天线之间釆用天线开关连接， 进 行不同频段之间的切换。 然而， 当多模射频单元包括 LTE通信模式的射频单 元时， 由于 LTE需要 MIMO ( Multiple-Input Multiple-Out-put ,多输入多输出） 支持， 此时釆用双天线接收的形式。 其中， 所有模式射频单元各自沿用现有 射频平台。 在发射、 接收通路上都统一接入频段开关 SW1及天线 ΑΝΤ1。 天 线 SW2及开关 ΑΝΤ2提供 LTE MIMO的接收分集。 该系统中， 射频硬件部分可以与现有技术中 （如背景技术部分介绍） 的 多模系统相同， 并且， 增加了多模射频接口。 本实用新型主要的创新点在于把模拟的基带部布置到多模射频单元侧， 通过通道选通模块实现对不同的模式的 IQ 信号的切换， 输出统一的数字并 口信号。 只要通道选通模块的 pin脚位足够多， 都可以釆用此方案实现多种 射频模式之间的接口统一， 实现在现有条件下的多模射频方案。 现有基带芯片不能提供支持现有不同射频模式的接口形式， 通过本实用 新型， 简化了射频与基带接口， 基带只需要执行一种接口就可以了。 不同的 射频模式接口切换可以由模拟基带中的模拟开关模块完成。 与原有方案比较，本实用新型提供的多模射频接口方案简化了基带接口， 统一成为数字并口； 缩短了模拟 IQ 信号等敏感信号的走线距离， 降低了设 计要求和信号千扰。 同时因为多路开关模块的开关数量可以拓展， 那么只要 是釆用模拟 IQ 接口方案的射频模式都可以接入， 真正实现了射频、 基带接 口的简 4匕。 显然， 本领域的技术人员可以对本实用新型进行各种改动和变型而不脱 离本实用新型的精神和范围。 这样， 倘若本实用新型的这些修改和变型属于 本实用新型权利要求及其等同技术的范围之内， 则本实用新型也意图包含这 些改动和变型在内。 The D/A conversion module 222 is configured to receive the digital IQ signal sent by the digital baseband unit, convert the digital IQ signal into an analog IQ signal, and send the digital IQ signal to the channel gating module 210. Preferably, in order to reduce the wiring between the multimode radio frequency unit and the multimode radio frequency interface, the multimode radio frequency interface provided by the present invention is preferably disposed on the multimode radio unit side. As shown in FIG. 3, the system structure diagram of the multimode radio frequency interface provided in the utility model is arranged on the side of the multimode radio unit. As shown in FIG. 3, the multimode radio frequency interface is located between the multimode radio unit and the digital baseband unit, and the radio channel unit of different communication modes is automatically switched by the channel gating module in the interface, and then sent to the signal processing module for processing. The resulting unified interface is sent to the digital baseband unit. The radio frequency unit and the antenna in the multi-mode radio unit are connected by an antenna switch to switch between different frequency bands. However, when the multimode radio unit includes the radio unit of the LTE communication mode, since LTE requires MIMO (Multiple-Input Multiple-Out-put) support, a form of dual antenna reception is used. Among them, all mode RF units each use the existing RF platform. The frequency band switch SW1 and the antenna ΑΝΤ1 are uniformly connected to the transmitting and receiving paths. Antenna SW2 and switch ΑΝΤ2 provide receive diversity for LTE MIMO. In this system, the RF hardware portion can be the same as the multimode system of the prior art (as described in the background section), and a multimode RF interface is added. The main innovation of the utility model lies in that the simulated baseband portion is arranged on the multi-mode radio unit side, and the channel gating module is used to switch the IQ signals of different modes, and the unified digital parallel port signal is output. As long as there are enough pin pins of the channel gating module, this solution can be used to realize the interface unification between multiple radio modes, and realize the multi-mode radio solution under the existing conditions. The existing baseband chip cannot provide an interface form supporting the existing different radio frequency modes. By the utility model, the radio frequency and baseband interface are simplified, and the baseband only needs to execute one interface. Different RF mode interface switching can be done by analog switch modules in the analog baseband. Compared with the original scheme, the multi-mode RF interface solution provided by the utility model simplifies the baseband interface and becomes a digital parallel port; shortens the trace distance of sensitive signals such as analog IQ signals, and reduces the design Counting requirements and signal interference. At the same time, because the number of switches of the multi-way switch module can be expanded, as long as the RF mode of the analog IQ interface solution can be accessed, the RF and baseband interfaces can be realized. It is apparent that those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and the modifications

Claims

权 利 要 求 书 一种多模射频接口，应用在包括数字基带单元和多模射频单元的系统中， 所述多模射频单元包括与多个通信模式对应的多个射频单元， 其特征在 于， 包括： 通道选通模块和信号处理模块； 所述通道选通模块， 一端与所述多模射频单元相连， 另一端与所述 信号处理模块相连， 用于在接收到所述信号处理模块或所述多模射频单 元中的某个射频单元发送的模拟同相正交 IQ信号时，闭合对应的通道开 关， 并转发所述模拟 IQ信号； 所述信号处理模块， 一端与所述通道选通模块相连， 另一端与所述 数字基带单元相连， 用于对所述通道选通模块和数字基带单元间交互的 IQ信号进行模数或数模转换处理。 如权利要求 1所述的多模射频接口， 其特征在于， 所述通道选通模块在接收到所述多模射频单元的某个射频单元发送 的模拟 IQ信号时， 将与发送该模拟 IQ信号的射频单元对应的通道开关 闭合， 并转发所述模拟 IQ信号至所述信号处理模块； 在接收到所述信号 处理模块发送的模拟 IQ信号时， 将所述模拟 IQ信号目的地址指示的射 频单元所对应的通道开关闭合， 并转发该模拟 IQ信号至该模拟 IQ信号 指示的射频单元。 如权利要求 1所述的多模射频接口， 其特征在于， 所述信号处理模块包 括： A/D转换模块和 D/A转换模块； 所述 A/D转换模块， 用于接收所述通道选通模块发送的模拟 IQ信 号，将所述模拟 IQ信号转换为数字 IQ信号后发送至所述数字基带单元； 所述 D/A转换模块， 用于接收所述数字基带单元发送的数字 IQ信 号，将所述数字 IQ信号转换为模拟 IQ信号后发送至所述通道选通模块。 如权利要求 1或 2或 3所述的多模射频接口， 其特征在于， 所述多模射 频接口布置在所述多模射频单元侧。 The present invention is a multi-mode radio frequency interface, which is applied to a system including a digital baseband unit and a multi-mode radio frequency unit. The multi-mode radio frequency unit includes a plurality of radio frequency units corresponding to a plurality of communication modes, and includes: a channel gating module and a signal processing module; the channel gating module, one end is connected to the multi-mode radio frequency unit, and the other end is connected to the signal processing module, and is configured to receive the signal processing module or the When the analog in-phase quadrature IQ signal sent by a radio frequency unit in the analog RF unit is closed, the corresponding channel switch is closed, and the analog IQ signal is forwarded; the signal processing module is connected to the channel gating module at one end, and One end is connected to the digital baseband unit for performing analog-to-digital or digital-to-analog conversion processing on the IQ signal exchanged between the channel gating module and the digital baseband unit. The multimode radio frequency interface according to claim 1, wherein the channel gating module transmits and transmits the analog IQ signal when receiving an analog IQ signal sent by a radio frequency unit of the multimode radio unit. The channel switch corresponding to the radio frequency unit is closed, and the analog IQ signal is forwarded to the signal processing module; when receiving the analog IQ signal sent by the signal processing module, the radio frequency unit indicating the destination address of the analog IQ signal is The corresponding channel switch is closed, and the analog IQ signal is forwarded to the radio unit indicated by the analog IQ signal. The multimode radio frequency interface according to claim 1, wherein the signal processing module comprises: an A/D conversion module and a D/A conversion module; and the A/D conversion module is configured to receive the channel selection The analog IQ signal sent by the module is converted into a digital IQ signal and sent to the digital baseband unit; the D/A conversion module is configured to receive the digital IQ signal sent by the digital baseband unit, The digital IQ signal is converted to an analog IQ signal and sent to the channel gating module. The multimode radio frequency interface according to claim 1 or 2 or 3, wherein said multimode radio frequency interface is disposed on said multimode radio unit side.
PCT/CN2010/077964 2009-12-02 2010-10-21 Multi-mode radio frequency interface WO2011066766A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2009202711799U CN201571051U (en) 2009-12-02 2009-12-02 Multimode radio frequency interface
CN200920271179.9 2009-12-02

Publications (1)

Publication Number Publication Date
WO2011066766A1 true WO2011066766A1 (en) 2011-06-09

Family

ID=42663352

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2010/077964 WO2011066766A1 (en) 2009-12-02 2010-10-21 Multi-mode radio frequency interface

Country Status (2)

Country Link
CN (1) CN201571051U (en)
WO (1) WO2011066766A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4224179A1 (en) * 2022-02-04 2023-08-09 Rohde & Schwarz GmbH & Co. KG Transceiver module

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201571051U (en) * 2009-12-02 2010-09-01 中兴通讯股份有限公司 Multimode radio frequency interface
CN102448129B (en) * 2011-12-31 2017-12-22 中兴通讯股份有限公司 The mode switching method and device of LTE system
CN103379670A (en) * 2012-04-20 2013-10-30 中兴通讯股份有限公司 Multi-mode terminal
CN103580711B (en) * 2012-07-20 2018-05-08 深圳市中兴微电子技术有限公司 The method of multimode terminal and its receiving and transmitting signal
CN103439710A (en) * 2013-08-19 2013-12-11 电信科学技术第一研究所 GPS comprehensive splitter
CN106452495B (en) * 2015-08-05 2018-12-28 中国移动通信集团公司 A kind of wireless device and RF front-end module control method
CN110365361B (en) * 2019-07-09 2021-07-09 上海金卓网络科技有限公司 Radio frequency interface controller, communication method, baseband chip and communication system
CN113453425A (en) * 2021-06-29 2021-09-28 惠州Tcl云创科技有限公司 PCB assembly and mobile terminal

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1561578A (en) * 2001-10-01 2005-01-05 诺基亚有限公司 Adaptive sigma-delta data converter for mobile terminals
CN2733754Y (en) * 2004-08-20 2005-10-12 南京东大宽带通信技术有限公司 Multi-frequency multi-mode terminal verifying circuit
US20070155344A1 (en) * 2005-12-29 2007-07-05 Motorola, Inc. Wireless multimode co-band receiver device and method employing receiver bypass control
US20070275675A1 (en) * 2001-11-14 2007-11-29 Broadcom Corporation Integrated Multimode Radio and Components Thereof
CN101483479A (en) * 2009-02-13 2009-07-15 苏州通创微芯有限公司 Multi-mode radio frequency switch module used for wireless communication
CN201571051U (en) * 2009-12-02 2010-09-01 中兴通讯股份有限公司 Multimode radio frequency interface

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1561578A (en) * 2001-10-01 2005-01-05 诺基亚有限公司 Adaptive sigma-delta data converter for mobile terminals
US20070275675A1 (en) * 2001-11-14 2007-11-29 Broadcom Corporation Integrated Multimode Radio and Components Thereof
CN2733754Y (en) * 2004-08-20 2005-10-12 南京东大宽带通信技术有限公司 Multi-frequency multi-mode terminal verifying circuit
US20070155344A1 (en) * 2005-12-29 2007-07-05 Motorola, Inc. Wireless multimode co-band receiver device and method employing receiver bypass control
CN101483479A (en) * 2009-02-13 2009-07-15 苏州通创微芯有限公司 Multi-mode radio frequency switch module used for wireless communication
CN201571051U (en) * 2009-12-02 2010-09-01 中兴通讯股份有限公司 Multimode radio frequency interface

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4224179A1 (en) * 2022-02-04 2023-08-09 Rohde & Schwarz GmbH & Co. KG Transceiver module

Also Published As

Publication number Publication date
CN201571051U (en) 2010-09-01

Similar Documents

Publication Publication Date Title
WO2011066766A1 (en) Multi-mode radio frequency interface
CN109861734B (en) Radio frequency system, antenna switching control method, related equipment and storage medium
KR101285027B1 (en) Multimode communication terminal and multimode communication implementation method
JP5992114B2 (en) Multi-mode terminal and handover method for multi-mode terminal
JP5487274B2 (en) Digital receiver for software radio implementation
CN104618527B (en) Antenna-switching device and communication terminal
CN108494414A (en) Super low-power consumption multimode Internet of Things wireless module
KR20210138733A (en) Radio Frequency Front End Circuits and Mobile Terminals
CN104468069B (en) A kind of wireless communication system and communication means of TDD/FDD bimodulus restructural
CN108418611B (en) A kind of extensive Multiinputoutput wireless channel simulation instrument
KR20080110553A (en) Single-chip wireless transceiver
JP2011527845A (en) Modem device for modular wireless communication system
CN104242981A (en) Embedded type communication device based on software radio
WO2012139389A1 (en) Baseband radio frequency interface based on software defined radio and application method therefor
JP2022040101A (en) Radio frequency chip, baseband chip, and wlan device
WO2018192537A1 (en) Soc-based 5g hardware platform system and method for achieving same
CN104619046B (en) Communication terminal
JP2013135473A (en) Power amplifier and wireless communication device including the same
WO2022062586A1 (en) Radio frequency drx device, radio frequency system, and communication apparatus
CN202121782U (en) Near-end node, far-end node, and indoor distribution system
CN201222725Y (en) Multi-mode wireless communication device and signal transmission module
WO2012122742A1 (en) Radio communication transmission system and method based on soft defined radio
WO2023197662A1 (en) Dual-transmitting radio frequency circuit and electronic device
CN101707816A (en) Transmitting device of mobile terminal and method for implementing signal transmission
CN104618975B (en) The method that 2G/3G circuit domain called services are realized under LTE PS connection status

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 10834199

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 10834199

Country of ref document: EP

Kind code of ref document: A1