WO2008119284A1 - Application frontale radiofréquence partagée, station de base et procédé permettant de partager une application frontale radiofréquence - Google Patents

Application frontale radiofréquence partagée, station de base et procédé permettant de partager une application frontale radiofréquence Download PDF

Info

Publication number
WO2008119284A1
WO2008119284A1 PCT/CN2008/070479 CN2008070479W WO2008119284A1 WO 2008119284 A1 WO2008119284 A1 WO 2008119284A1 CN 2008070479 W CN2008070479 W CN 2008070479W WO 2008119284 A1 WO2008119284 A1 WO 2008119284A1
Authority
WO
WIPO (PCT)
Prior art keywords
base station
shared
radio frequency
frequency front
signals
Prior art date
Application number
PCT/CN2008/070479
Other languages
English (en)
Chinese (zh)
Inventor
Yulin Li
Chun 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.
Publication of WO2008119284A1 publication Critical patent/WO2008119284A1/fr

Links

Classifications

    • 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
    • H04W88/08—Access point devices
    • H04W88/10—Access point devices adapted for operation in multiple networks, e.g. multi-mode access points

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method for sharing a radio frequency front end, a base station, and a radio frequency front end.
  • 2G (2nd Generation, 2nd generation mobile communication technology) is a mature and widely used technology.
  • 2G GSM Golbal System for Mobile Commnication
  • 3G (3rd Generation, 3rd Generation Mobile Communication Technology) is a new generation of mobile communication technology. It is recognized by WCDMA (Wideband Code Division Multiple Access) and is recognized as the future development direction. In some regions and countries, it has been applied to a certain scale, and relevant international and domestic standardization organizations and communication management agencies have defined multiple frequency bands available for 2G and 3G. In the current and future, there will be overlapping of 2G and 3G available frequency bands. .
  • 3G network will gradually replace the location of 2G network with its powerful functions and many advantages.
  • 2G network will gradually transition to 3G network.
  • the base station is a component of the existing network architecture, and its number is large.
  • the 2G base station needs to be replaced with the 3G base station, which is costly and does not meet the requirements of low-cost smooth transition.
  • the common design principle diagram of the RF front-end in the existing base station equipment is shown in Figure 1.
  • the specific principle is as follows:
  • the base station transmits the signal to the transmitting channel of the RF front-end after being amplified by the power amplifier, and the combined signal of several transmitter signals is realized by the combiner. After passing through the transmit filter in the duplexer to suppress out-of-band spurious and interference signals, it is sent to the antenna for radiation.
  • the uplink signal received by the antenna passes through the receiving filter in the duplexer to suppress the transmitted signal, filters out the out-of-band interference signal, enters the low noise amplifier and the splitter for low noise amplification and splitting, and sends it to the receiver for further processing.
  • the RF front-end 2G base stations and 3G base stations have different functions, performances, and physical and structural requirements. Therefore, different designs are required for their respective requirements, as shown in Figure 2.
  • the GSM radio frequency front end and the GSM base station carrier frequency are used according to the requirements of the function, and the WCDMA carrier frequency is adopted in the WCDMA base station.
  • the required WCDMA RF front-end and WCDMA base station carrier frequency, the two RF front-end and base station carrier frequencies each have different functions and performance indicators, and the WCDMA RF front-end and WCDMA base station carrier frequencies cannot be used in the GSM base station. Similarly, the WCDMA base station cannot be used.
  • the GSM radio front end and the GSM base station carrier frequency are used.
  • the RF front-ends of the two base stations cannot be used in common or shared, the RF front-end needs to be replaced when upgrading from 2G to 3G, and the 2G RF front-end is replaced with a 3G RF front-end.
  • the GSM base station and the WCDMA base station are still used.
  • the GSM radio frequency front end and the GSM base station carrier frequency used in the GSM base station cannot be used in the new WCDMA base station, it is necessary to The carrier frequency of the GSM radio frequency front end and the GSM base station is replaced by the WCDMA radio frequency front end and the WCDMA base station carrier frequency.
  • the cost is very high, and because of the large number of base stations, it also brings a lot of inconvenience to the replacement of the radio frequency front end.
  • the transition from 2G to 3G may be a long process
  • the 2G base station and the 3G base station may have a long coexistence period.
  • the maintenance of the RF front end is inconvenient and the cost is low. Also higher.
  • the embodiments of the present invention provide a method for sharing a common radio frequency front end, a base station, and a radio frequency front end, so as to solve the problem that the current radio frequency front end is shared by the 2G and 3G base stations, and facilitate the upgrade from 2G to 3G.
  • an embodiment of the present invention provides a base station, including: a shared radio frequency front end and at least two different types of base station carrier frequencies, where
  • the shared radio frequency front end is configured to perform front end processing on at least one type of signals sent and received by the base station carrier frequency of the at least two different systems;
  • the base station carrier frequency of the at least two different systems is used for transmitting and receiving at least one type of signal with the shared radio frequency front end.
  • Embodiments of the present invention also provide a shared radio frequency front end, including: a shared low noise amplifier and shunt unit, a shared combining unit, and a shared signal transceiving duplex unit.
  • the shared signal transceiver duplex unit is configured to perform transmission and reception processing on at least one of base station carrier frequencies of at least two different systems;
  • the shared low noise and splitting unit is connected to the shared signal transceiver duplex unit for performing low noise amplification and splitting on at least one of the at least two base station carrier frequencies of different systems;
  • the shared combining unit is connected to the common signal transceiving duplex unit, and is used for combining at least one of base station carrier frequencies of at least two different systems.
  • An embodiment of the present invention further provides a method for sharing a radio frequency front end, comprising the steps of: transmitting and receiving at least one of base station carrier frequencies of at least two different systems by using a preset shared radio frequency front end.
  • the embodiment of the present invention reduces the type and number of radio frequency front ends when the base stations coexist in at least two different systems, thereby reducing the cost of the base station; when the base station is upgraded in at least two different standards, the radio frequency front end of the original base station can be retained, without
  • the replacement not only reduces the cost of base station upgrades of at least two different systems (such as upgrading a 2G base station to a 3G base station); it also improves the flexibility of configuration when at least two different types of base stations are co-networked.
  • FIG. 1 is a schematic structural view of a front end of a radio frequency in the prior art
  • FIG. 2 is a schematic diagram of a shared site of a GSM and WCDMA base station in the prior art
  • FIG. 3 is a schematic diagram of upgrading a GSM base station to a WCDMA base station in the prior art
  • FIG. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a radio frequency front end of a 2G base station and a 3G transceiver in the embodiment of the present invention
  • FIG. 6 is a schematic diagram of an RF front end of a 2G base station upgraded to a 3G base station according to an embodiment of the present invention; Functional diagram of the front end;
  • FIG. 8 is a flowchart of a method for sharing a radio frequency front end according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of the composition of a shared radio frequency front end according to an embodiment of the present invention.
  • Embodiments of the present invention utilize at least two different standards (such as 2G and 3G; 2.5G and 3G, or 2G, 3G, and long-term evolution networks, etc.) base station RF front-end functions and performance commonalities, and unified radio frequency front-end functions and performances. And the outer structure, the base station of the at least two different standards is used for the common and common to the radio frequency front end.
  • standards such as 2G and 3G; 2.5G and 3G, or 2G, 3G, and long-term evolution networks, etc.
  • the schematic diagram of the structure of the base station in the embodiment of the present invention, as shown in FIG. 4, includes: a shared RF front end 100 (for example, a shared RF front end of 2G and 3G, or a shared RF front end of 2.5G and 3G, or 2G, 3G, and long term evolution networks)
  • the shared radio frequency front end, etc. at least two different types of base station carrier frequencies, in this embodiment, the 2G base station carrier frequency 200 and the 3G base station carrier frequency 300 are taken as examples, and the implementation process of the three or more different standard carrier frequency base station embodiments is The two are similar, as described in the following two implementations.
  • the common radio frequency front end 100 is configured to perform front end processing on at least one type of signals sent and received by the base station carrier frequency of the different systems.
  • This embodiment takes the front end processing of the transmitted and received 2G and/or 3G signals as an example, and subsequently 2G base station carrier frequency 200, connected to the shared RF front end 100, used for transmitting and receiving 2G signals with the shared RF front end 100; 3G base station carrier frequency 300, connected to the shared RF front end 100, for sharing The transmission and reception of 3G signals are performed between the RF front ends 100.
  • the shared RF front end 100 further includes: a shared signal transceiver duplex unit 101, a shared low noise and split unit 102 and a shared combining unit 103, and a shared signal transceiver duplex unit 101 for pairing 2G and/or 3G.
  • the signal is sent and received, and the shared signal transceiver duplex unit 101 sets the working frequency band suppression degree of the RF front end, and the working capacity is 2G and the more stringent requirements in the 3G base station; the shared low noise and split unit 102 is connected.
  • the shared signal transceiver duplex unit 101 is configured to perform low noise amplification and splitting on the 2G and/or 3G signals, and the shared low noise and split unit 102 sets the receive gain, the receive noise figure, and the receive channel input ldB compression point.
  • the number of split ports and the isolation between the split ports are more stringent requirements in the 2G and 3G base stations; the shared combine unit 103 connects the shared signal transceiver duplex unit 101 for combining 2G and/or 3G signals. Road, and the shared combining unit 103 sets the number of combined input ports, the isolation between the combined input ports is 2G, and the requirements in the 3G base station are stricter. index of.
  • the specific parameter settings will be described in detail in the following method embodiments shared by the RF front-end of the present invention, and are not mentioned here.
  • the shared signal transceiver duplex unit 101 further includes: a shared receive filter subunit 1011 and a shared transmit filter subunit 1012.
  • the shared receiving filtering subunit 1011 is configured to receive 2G and/or 3G signals, and perform interference filtering on the 2G and/or 3G signals, and the common receiving filtering subunit 1011 sets the receiving channel to suppress the transmitting frequency band to 2G and 3G.
  • a more stringent indicator is required in the base station;
  • a common transmit filter sub-unit 1012 is configured to perform interference filtering on the 2G and/or 3G signals and then transmit the radiation to the antenna, and the common transmit filter sub-unit 1012 sets the transmit channel to the receive band.
  • the degree of inhibition is More stringent metrics are required in 2G and 3G base stations.
  • a 2G and 3G signal transceiver device uses a shared radio frequency front end to implement signal transmission and reception, and a base station where 2G and 3G transceivers coexist, 2G and 3G carrier frequency sharing.
  • RF front-end, 2G signal transmitter in the figure, 2G transmitter 1 to 2G transmitter n is taken as an example).
  • the RF signal is sent to the corresponding 2G signal receiver (2G receiver 1 to 2G in the figure)
  • the receiver n is an example
  • the 3G signal transmitter in the figure, the 3G transmitter 1 to 3G transmitter n is taken as an example
  • the machine 1 to 3G receiver n is an example).
  • the shared radio frequency front end in this embodiment is not used to implement transmission between the transmitter and the receiver in the same base station, but to realize the connection between the transmitter, the receiver and the antenna feeder system.
  • the base station's transmitter and receiver communicate with a mobile station (such as a mobile phone).
  • the above is the coexistence of the 2G base station and the 3G base station.
  • the 2G base station is upgraded to the 3G base station, as shown in FIG. 6, since the previous GSM base station uses the 2G and 3G base stations to share the RF front end, Supports the functions and performance indicators of the 3G base station. Therefore, in the process of upgrading from 2G to 3G, the RF front end can be replaced, and the RF front end can continue to play the role of the 3G radio frequency front end in the 3G base station.
  • the schematic diagram of the RF front-end function of the upgraded 3G base station as shown in Figure 7, after the 2G base station is upgraded to the 3G base station, the shared RF front-end in the previous 2G base station continues to be used, and the 3G signal transmitter and the 3G signal receiver are implemented. The role of the signal transceiving function.
  • the port on the RF front end can continue to be used by the 3G base station carrier frequency.
  • the embodiment of the present invention further provides a method for sharing a radio frequency front end. As shown in FIG. 8, the method includes the following steps:
  • Step S801 preset a common radio frequency front end of the base station of at least two different standards; the step is optional.
  • This embodiment also sets the shared RF front end of the 2G and 3G base stations as an example.
  • the common functions, performance indicators and external dimensions of the 2G base station RF front end and the 3G base station RF front end are used to set the common RF front end of the base station.
  • the method for sharing the radio frequency front end of the embodiment of the present invention has multiple sharing modes, and the low noise amplifier and the splitter, the shared combiner and the shared duplexer are taken as an example.
  • the 2G and 3G shared RF front ends consist of a shared low noise amplifier and splitter, a shared combiner and a shared duplexer (including a shared receive filter and a shared transmit filter). It shares a low noise amplifier with a splitter, a shared combiner and a shared duplexer Relevant indicators are set to require more stringent indicators in the 2G and 3G indicators.
  • the suppression of the transmit band by the shared receive filter in the duplexer is required to be more stringent in the 2G and 3G base stations;
  • the receive gain of the shared low noise amplifier and splitter, the input channel input ldB compression point and the receive noise Coefficient you can choose more strict indicators, or you can choose a wider indicator, which needs to be determined according to the design specifications of the 2G and 3G base station receiving links;
  • the number of shunt output ports sharing the low noise amplifier and the splitter The isolation between the split ports meets the higher requirements of the 2G and 3G base stations;
  • the isolation index between the input ports of the combiner meets the more stringent requirements of the 2G and 3G base stations; 2G and 3G share
  • the RF front-end is designed to be installed either at a 2G base station or
  • Table 1 GSM, WCDMA RF front-end indicators and shared RF front-end indicators
  • GSM/WCDMA indicator name GSM base station front end
  • Base station shared front end transmit channel
  • the shared RF front-end set according to Table 1 can be used in the GSM base station or in the WCDMA base station or shared by the two base stations. Then, the external RF front-end structure is designed to be compatible with the two base stations, and the shared RF front-end can be finally shared between the two base stations. Structurally compatible requirements are also achievable. Because in the shared RF front-end, the duplexer and filter occupy most of the structure space, and the volume of the duplexer and filter is mainly determined by the volume and number of resonators constituting the duplexer and the filter.
  • the structure and volume of the resonator in the same frequency band can be basically used in general, and the suppression index of the number of resonators is unified by the previous electrical performance setting. Therefore, the duplexer and filter occupying most of the volume in the structure can be set to a general structure.
  • the rest is mainly active circuits, which are partly set to a common structure due to their high integration and small footprint.
  • the shared RF front-end set up in the above table increases the flexibility of networking and reduces the cost of network upgrades.
  • the radio frequency front end described in this embodiment may include: a duplexer, a transmit combiner, a receive low noise amplifier, a splitter, and an auxiliary detection control unit, such as a receive channel attenuation control, resident. The sharing of wave alarm detection and so on.
  • the radio frequency front end may share a radio frequency transceiver, a power amplifier, and the like in addition to the above-disclosed devices.
  • Step S802 Send and receive at least one of base station carrier frequencies in at least two different systems by using a pre-selected shared radio frequency front end.
  • the 2G and 3G base stations use the common RF front-end to transmit and receive signals as an example.
  • the signal transmission and reception process involves the problem of whether to combine the 2G and/or 3G signals:
  • the antenna feeder system inputs the 2G and/or 3G transmission signals into different antenna feeders respectively.
  • the 2G and/or 3G transmission signals are not combined in the same transmission channel, and the transmission signals in this manner are not combined.
  • the 2G and / or 3G signals includes: broadband combining and filtering combining, and broadband combining means connecting two or more channels through a broadband combiner, such as a 3dB coupler.
  • the 2G and/or 3G signals are combined and input into the same transmitting channel to transmit in the same transmitting channel.
  • the bandwidths of the combined input port and the combined output port include the corresponding working frequency bands of the 2G and 3G carrier frequencies. In this way, the combined signal insertion loss is large; the filter combination means that two or more 2G and/or 3G signals are combined by a filter combiner, such as a common cavity combiner.
  • the center frequency of the combined input port can be adjusted, the bandwidth is narrower than the corresponding working frequency band of the corresponding 2G, 3G carrier frequency, but at least covers the bandwidth of one channel of 2G and 3G .
  • the bandwidth of the combined output port contains the entire working frequency band of the corresponding 2G and 3G carrier frequencies. In this way, the transmit signal combined insertion loss is relatively small.
  • 2G and 3G signal inputs can also be transmitted through different transmission channels and received through different receiving channels.
  • the specific implementation process is similar to transmitting and receiving in the same transmission channel, and will not be described in detail herein.
  • the duplexer transmit port and combiner of the RF front end are independent, then in the 2G base station, since the 2G carrier frequency may not support multi-carrier transmission, the multi-channel transmit signal may be first transmitted through the combiner. In the 3G base station, since the carrier frequency of the 3G supports multiple carriers, the combiner can be skipped and the multi-carrier transmit signal can be directly sent to the duplexer transmit port.
  • the embodiment of the present invention reduces the type and number of radio frequency front ends when the 2G and 3G base stations coexist, thereby reducing the cost of the base station; when the 2G base station is upgraded to the 3G base station, the original radio frequency front end can be retained without replacement.
  • the cost of upgrading the 2G base station to the 3G base station is reduced; and the flexibility of the configuration when the 2G and 3G base stations are jointly set up is also improved.

Abstract

Cette invention concerne un station de base comprenant: une application frontale radiofréquence partagée et au moins deux fréquences porteuses de station de base présentant un système différent. L'application frontale radiofréquence partagée exécute un processus d'application frontale sur au moins un type de signal émis/reçu par l'intermédiaire de deux fréquences porteuses de station de base avec un système différent, elle exécute ensuite la transmission/réception du type de signal entre l'application frontale radiofréquence partagée et les deux fréquences porteuses de station de base avec un système différent. Cette invention concerne un procédé permettant de partager une application frontale radiofréquence et une application frontale radiofréquence partagée. Le type et le nombre de l'application frontale radiofréquence lorsque 2G coexiste avec 3G peut être réduit, ce qui permet de réduire le coût de la station de base. Lors de la mise à niveau supérieur de la station de base 2G à la station de base 3G, le mécanisme de l'application frontale radiofréquence d'origine peut être conservé et il n'est pas nécessaire de le remplacer, ce qui permet de réduire le coût de la mise à niveau. D'autre part, la souplesse du mécanisme lors de l'organisation du réseau par la station de base 2G et par la station de base 3G peut également être améliorée.
PCT/CN2008/070479 2007-03-30 2008-03-12 Application frontale radiofréquence partagée, station de base et procédé permettant de partager une application frontale radiofréquence WO2008119284A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200710090992.1 2007-03-30
CN200710090992A CN100579265C (zh) 2007-03-30 2007-03-30 共用射频前端、基站和射频前端共用的方法

Publications (1)

Publication Number Publication Date
WO2008119284A1 true WO2008119284A1 (fr) 2008-10-09

Family

ID=38783330

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2008/070479 WO2008119284A1 (fr) 2007-03-30 2008-03-12 Application frontale radiofréquence partagée, station de base et procédé permettant de partager une application frontale radiofréquence

Country Status (2)

Country Link
CN (1) CN100579265C (fr)
WO (1) WO2008119284A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116032341A (zh) * 2023-03-09 2023-04-28 深圳国人无线通信有限公司 基站参数的配置方法及基站

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100579265C (zh) * 2007-03-30 2010-01-06 华为技术有限公司 共用射频前端、基站和射频前端共用的方法
US9497799B2 (en) 2013-10-04 2016-11-15 Mediatek Inc. Method for controlling RF signal processing components and communications apparatus utilizing the same
KR102621810B1 (ko) * 2017-01-16 2024-01-09 삼성전자주식회사 복수의 프로토콜을 이용한 통신 방법 및 그 전자 장치
CN111431545B (zh) * 2020-03-30 2023-03-17 Oppo广东移动通信有限公司 一种电子设备和通信干扰控制方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2472432Y (zh) * 2001-03-27 2002-01-16 上海理想信息产业有限责任公司 移动通信多频段信号分合路器
CN2731877Y (zh) * 2004-09-22 2005-10-05 摩比天线技术（深圳）有限公司 Gsm／cdma共天馈系统基站合路器
CN101052169A (zh) * 2007-03-30 2007-10-10 华为技术有限公司 共用射频前端、基站和射频前端共用的方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6282184B1 (en) * 1997-12-22 2001-08-28 Nortel Networks Limited Common digitizing rate for multiple air interfaces for generic cell sites in cellular radio
US20040038660A1 (en) * 2002-08-21 2004-02-26 Ziming He RF front-end for dual-mode wireless LAN module
CN2657318Y (zh) * 2003-11-25 2004-11-17 杭州紫光通信技术有限公司 Cdma/gms双频合路器
US7120465B2 (en) * 2003-12-20 2006-10-10 Telefonaktiebolaget Lm Ericsson (Publ) Transceiver system including multiple radio base stations that share an antenna

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2472432Y (zh) * 2001-03-27 2002-01-16 上海理想信息产业有限责任公司 移动通信多频段信号分合路器
CN2731877Y (zh) * 2004-09-22 2005-10-05 摩比天线技术（深圳）有限公司 Gsm／cdma共天馈系统基站合路器
CN101052169A (zh) * 2007-03-30 2007-10-10 华为技术有限公司 共用射频前端、基站和射频前端共用的方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116032341A (zh) * 2023-03-09 2023-04-28 深圳国人无线通信有限公司 基站参数的配置方法及基站

Also Published As

Publication number Publication date
CN101052169A (zh) 2007-10-10
CN100579265C (zh) 2010-01-06

Similar Documents

Publication Publication Date Title
JP5603950B2 (ja) アンテナ素子の多重化方法および多重化装置、ならびにアンテナ構成要素
US8059963B2 (en) Time division duplexing remote station having low-noise amplifier shared for uplink and downlink operations and wired relay method using the same
US8989677B2 (en) Apparatus and method for switching from reception to transmission
WO2015131456A1 (fr) Terminal multimode à double trajet
EP2790330A1 (fr) Système d'émission et de réception de communication sans fil
CN110198174B (zh) 射频前端发射电路、射频前端电路、收发机和基站设备
CN101841345A (zh) 一种时分双工射频拉远单元
TW201803296A (zh) 一種多業務數位光分佈系統及多業務容量調度方法
WO2006057085A1 (fr) Appareil de communication sans fil
WO2012126248A1 (fr) Procédé et terminal permettant de supprimer des brouillages mutuels entre modes de terminal
CN109474921B (zh) 一种自组网应急通信系统及其通信方法
CN102882573A (zh) 多输入多输出的信号传输实现方法、装置及系统
WO2008119284A1 (fr) Application frontale radiofréquence partagée, station de base et procédé permettant de partager une application frontale radiofréquence
KR100711015B1 (ko) 무선 시스템 결합 장치 및 그 방법
AU2007351736A1 (en) Method and device for signal combination and different-system same-band antenna-sharing system
KR20020070729A (ko) 무선 통신 시스템의 신호 중계 장치
JP2004147191A (ja) 高出力多モード移動体通信用送受信装置
CA3126991A1 (fr) Reseaux d'amplificateurs dans un repeteur
JP7174078B2 (ja) 非同期ｔｄｄマルチ帯域動作のための無線ユニット
CN111490813A (zh) 天线复用射频装置以及移动终端
JP2005507206A (ja) 折り返し選択帯域フィルタ処理を用いた低雑音送信機構造及びその方法
WO2010130080A1 (fr) Procédé de partage d'une unité de réception rf, appareil et système associés
KR20080105803A (ko) 이동통신시스템의 중계기
WO2024016125A1 (fr) Module d'isolation de radiofréquence et système de communication
WO2024078254A1 (fr) Filtre duplex, procédé de réception de signal, procédé de transmission de signal et système d'émission-réception de signal

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: 08715215

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: 08715215

Country of ref document: EP

Kind code of ref document: A1