WO2007093096A1 - Amplificateur bidirectionnel, système de communication semi-duplex et procédé correspondant - Google Patents

Amplificateur bidirectionnel, système de communication semi-duplex et procédé correspondant Download PDF

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Publication number
WO2007093096A1
WO2007093096A1 PCT/CN2006/002627 CN2006002627W WO2007093096A1 WO 2007093096 A1 WO2007093096 A1 WO 2007093096A1 CN 2006002627 W CN2006002627 W CN 2006002627W WO 2007093096 A1 WO2007093096 A1 WO 2007093096A1
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Prior art keywords
transmission direction
control signal
transmission
data signal
amplifier
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PCT/CN2006/002627
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English (en)
French (fr)
Inventor
Hengfeng Zhang
Original Assignee
Huawei Technologies Co., Ltd.
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Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to CNA2006800121809A priority Critical patent/CN101160737A/zh
Publication of WO2007093096A1 publication Critical patent/WO2007093096A1/zh

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    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03FAMPLIFIERS
    • H03F3/00Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/62Two-way amplifiers

Definitions

  • the present invention relates to the field of communications, and in particular, to a single frequency point bidirectional amplifying device and a half duplex communication system and method therewith. , invention background
  • two-way transmission in a coaxial cable system generally uses two separate frequency communication, that is, the frequency used by the host device to communicate with the terminal device and the frequency at which the terminal device communicates with the host device are different.
  • the transmission distance is long or there are more users, it is necessary to increase the extension amplifier.
  • the bidirectional amplifier 70 includes two amplifiers for amplifying low frequency signals and high frequency signals, respectively.
  • the existing amplification technique is designed for frequency division multiplexing full-duplex communication, and the operating frequency of the amplifier in both the uplink and the downlink directions is different, and therefore, the existing amplifiers cannot be in the same
  • the frequency point amplifies the data signal of the half-duplex communication, that is, the existing amplifier cannot be applied to the half-duplex communication at the same frequency point.
  • An object of the present invention is to provide an amplification apparatus capable of solving the problem that the single-frequency point bidirectional amplification cannot be realized in the prior art, and a communication system and method having the same.
  • the bidirectional amplifying device provided by the present invention comprises an amplifier (C), and the bidirectional amplifying device amplifies a data signal bidirectionally transmitted at a single frequency point, the bidirectional amplifying device further comprising:
  • a transmission direction judging device configured to determine a transmission direction of a data signal input to the bidirectional amplifying device, and issue a switch control signal according to the determined transmission direction; and And a switching device, configured to switch the connection state according to the switch control signal, so that the amplifier (C) amplifies the data signal in the transmission direction, and the amplified data signal is transmitted to the receiving end in the transmission direction.
  • the transmission direction determining device includes:
  • a comparator configured to compare the power signals detected by the two detectors to determine a transmission direction, and issue a switch control signal.
  • the transmission direction determining device further includes:
  • Two amplifiers (E) and (G) are used to respectively amplify the power signals detected by the two detectors, and the comparator compares the amplified (A) and (G) power signals to determine the transmission direction.
  • the transmission direction judging means determines the transmission direction based on the transceiving control signal input from the outside.
  • the transmission direction judging device includes:
  • a filter configured to obtain a transceiving control signal from a signal sent from a receiving end or a transmitting end of the data signal
  • a demodulator configured to demodulate the transceiving control signal obtained by the filter, and output the signal
  • the demodulated transceiver control signal is used as a switch control signal to control the state of the switching device.
  • the switching device includes two single-pole double-throw switches connected to the input and output of the amplifier (C), respectively.
  • the present invention also provides a single frequency point half duplex communication system, comprising at least one first communication end, at least one second communication end, and a bidirectional amplification device located between the first communication end and the second communication end, the bidirectional The amplification device includes: an amplifier (C);
  • a transmission direction judging device configured to determine a transmission direction of a data signal input to the bidirectional amplifying device, and issue a switch control signal according to the determined transmission direction;
  • a switching device for switching its state according to the switching control signal to cause the amplifier (C) to amplify the data signal in the transmission direction, and the amplified data signal is transmitted to the receiving end in the transmission direction
  • the transmission direction determining device includes:
  • a comparator configured to compare the power signals detected by the two detectors to determine a transmission direction.
  • the transmission direction determining device further includes:
  • Two amplifiers (E) and (G) are used to respectively amplify the power signals detected by the two detectors, and the comparator compares the amplified (A) and (G) power signals to determine the transmission direction.
  • the transmission direction determining means determines the transmission direction according to the transmission and reception control signal transmitted by the first communication terminal or the second communication terminal.
  • the first communication end or the second communication end includes:
  • a modulator configured to modulate a transceiving control signal sent by the first/second communication terminal
  • a mixer for mixing the modulated control signals and data signals of the modulator and transmitting them to the two-way amplification device.
  • the transmission direction judging device includes:
  • a filter configured to obtain the transceiver control signal from a signal sent by the first/second communication end
  • a demodulator configured to demodulate the transceiver control signal obtained by the filter, and output the signal
  • the demodulated transceiver control signal is used as a switching control signal to control the state of the switching device.
  • the switching device includes two single-pole double-throw switches connected to the input and output of the amplifier (C), respectively.
  • the present invention also provides a single frequency point half duplex communication method, including:
  • the amplifier amplifies the data signal in the transmission direction, and the amplified data signal is transmitted to the receiving end in the transmission direction.
  • the step of determining a transmission direction includes:
  • the step of determining the direction of transmission by comparing the power of the data signals transmitted in the two transmission directions.
  • the transmission and reception control signals transmitted together with the data signal are used to determine the transmission direction.
  • the amplification of the data signal of the single-frequency point bidirectional transmission can be realized.
  • FIG. 1 is a structural block diagram of a prior art full duplex communication system.
  • FIG. 2 is a structural block diagram of a co-frequency half-duplex communication system in which a switch is in a first state, in accordance with a first embodiment of the present invention.
  • FIG. 3 is a structural block diagram of a same-frequency half-duplex communication system according to a first embodiment of the present invention, wherein the switch is Second state.
  • FIG. 4 is a block diagram showing the structure of a co-frequency half-duplex communication system in accordance with a second embodiment of the present invention. Mode for carrying out the invention
  • the co-frequency half-duplex communication system includes a host 10 (20), a bi-directional amplifier 30 (40) and a plurality of terminals 50, which are coupled to a bi-directional amplifier 30 (40) via a distribution network.
  • the bidirectional amplifier 30 (40) is used to amplify data signals from the host 10 (20) or the terminal 50, and the host 10 (20) and the terminal 50 do not simultaneously transmit data.
  • the bidirectional amplifier 30 (40) has a function of judging a transmission direction, and can amplify the transmitted data signal by an amplifier C in accordance with the determined transmission direction.
  • the bidirectional amplifier 30 determines the direction of transmission by means of detection comparison.
  • the bidirectional amplifier 30 includes two detectors D and F connected to the host 10 and the terminal 50, respectively, for detecting the power RMS value of the data signal transmitted by the host 10 and the terminal 50; two amplifiers E and G, respectively, and the detector D and F are connected, for amplifying the power rms value of the outputs of the detectors D and F; a comparator H for comparing the outputs of the amplifiers E and G to determine the transmission direction, and issuing a switch control signal; single-pole double-throw switch A and B, which switch their states according to the switch control signal from the comparator H, so that the data signal sent from the transmitting end is transmitted to the input terminal of the amplifier C through the single-pole double-throw switch A, and the amplifier C amplifies the data signal and then passes through the single-pole The double throw switch B is transmitted to the receiving end.
  • the data signal transmitted by the host 10 is detected by the detector D, and then output to the amplifier E for amplification, and the comparator H compares the output voltages of the amplifier E and the amplifier G at both ends.
  • the comparator H issues a switch control signal according to the comparison result, and the switch control signal is transmitted to the single-pole double-throw switches A and B, so that the single-pole double-throw switch A Both B and B are in the first state as shown in FIG. 2.
  • the data signal of the host 10 passes through the single-pole double-throw switch A input amplifier C, and is amplified by the amplifier C and transmitted to the terminal 50 via the single-pole double-throw switch B.
  • the data signal transmitted by the terminal 50 is detected by the detector F, and then output to the amplifier E for amplification.
  • the comparator H compares the output voltages of the amplifiers E and G at both ends, and issues a switch control according to the comparison result.
  • the signal causes the single-pole double-throw switches A and B to be in the second state (as shown in FIG. 3).
  • the data signal of the terminal 50 passes through the single-pole double-throw switch A input amplifier C, and is amplified by the amplifier C and then passed through a single knife.
  • the double throw switch B is transmitted to the host 10.
  • the bidirectional amplifier 40 determines the transmission direction based on the transmission and reception control signal from the host 20.
  • the bidirectional amplifier 40 receives the transmission and reception control signal from the host 20, it determines that the transmission direction is from the host 20 to the terminal 50.
  • the bidirectional amplifier 40 does not receive the transmission and reception control signal from the host 20, it is determined that the transmission direction is from the terminal 50 to the host 20. .
  • the host 20 includes a modulator J and a mixer K.
  • the modulator J modulates a transceiving control signal, and sends the modulated transceiving control signal to the mixer K, and the mixer ⁇ mixes the data signal and the modulated transceiving control signal in the same root. In the cable, send it together to the bidirectional amplifier 40.
  • the bidirectional amplifier 40 includes a filter L for detecting a transceiving control signal from a signal (including a data signal and a transceiving control signal) sent from the host 20; a demodulator M for detecting the detected by the filter L Send and receive control signals; single-pole double-throw switches A and B, which switch their states according to the transceiving control signal demodulated from the demodulator M, so that the data signal sent by the transmitting end is transmitted to the amplifier C through the single-pole double-throw switch A.
  • the amplifier C amplifies the data signal and transmits it to the receiving end via the single-pole double-throw switch B.
  • the single-pole double-throw switches A, B and amplifier C in the present embodiment are the same as those in the first embodiment.
  • the single-pole double-throw switches A and B are in the first state as shown in FIG.
  • the single-pole double-throw switches A and B are in the second state.
  • the host 20 transmits the data signal and the modulated transmission and reception control signal to the bidirectional amplifier 40 through the modulator J and the mixer K.
  • the filter L of the bidirectional amplifier 40 detects the transmission and reception control signal from the signal sent from the host 20 and transmits it to the demodulator ⁇ .
  • the demodulator demodulates the transceiving control signal
  • the single-pole double-throw switches ⁇ and B are controlled such that the single-pole double-throw switches A and B are in the first state as shown in FIG.
  • the data signal of the host 20 passes through the single-pole double-throw switch A input amplifier C, and is amplified by the amplifier C and transmitted to the terminal 50 via the single-pole double-throw switch B.
  • the filter L does not detect the transmission and reception control signal, the single-pole double-throw switches A and B are in the second state.
  • the data signal of the terminal 50 passes through the single-pole double-throw switch A input amplifier C, and is amplified by the amplifier C and transmitted to the host 20 via the single-pole double-throw switch B.
  • the switching control signal sent by the terminal 50 can also be used to control the switching of the switch.
  • the principle is the same as the switching control of the switch by using the transmission and reception control signal sent by the host 20, and will not be described in detail herein.
  • the data direction of the data transmitted by the host and the terminal to the bidirectional amplifier is detected, or the transmission and reception control signal sent by the host is detected to determine the transmission direction, and the switch is switched according to the determined transmission direction so that the amplifier transmits the signal.
  • the data signal is amplified to achieve a single-frequency transmission of the bidirectional signal, occupying half the bandwidth of the prior art.
  • the switching of the transmission/reception control signal control switch is used, since the control signal is transmitted, the modulation method is simple, and the occupied bandwidth is small. Further, in the present invention, the amplification of the data signals in both directions is realized using only one amplifier, thereby saving cost.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Bidirectional Digital Transmission (AREA)
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Description

双向放大设备以及具有该设备的半双工通信系统和方法 技术领域
本发明涉及通信领域, 特别涉及一种单频点双向放大设备以及具有该设备的半双工 通信系统和方法。 , 发明背景
目前在同轴电缆系统中双向传输一般使用两个单独的频点通信, 即主机设备到终端 设备通信使用的频点和终端设备到主机设备通信使用的频点是不同的。在传输距离较长 或者分配用户较多的时候, 需要增加延长放大器。
图 1为现有技术同轴网的半双工通信系统的示意图。 目前同轴电缆网络中应用的通 信技术为频分复用技术, 即上行链路传输使用的频点和下行链路传输使用的频点是分开 的, 如图 1所示, 当主机 60到终端 80的通信使用高频点时, 终端 80到主机 60的通信 只能使用低频点, 反之当主机 60到终端 80的通信使用低频点时, 终端 80到主机 60只 能使用高频点, 总之二者不能使用同一频点通信。 该双向放大器 70包括两个放大器分 别用于放大低频信号和高频信号。
从图 1的描述可以看出, 现有的放大技术是针对频分复用全双工通信设计的, 放大 器在上下行两个方向上的工作频率不相同, 因此, 现有的放大器无法在同一频点对半双 工通信的数据信号进行放大, 即现有的放大器不能够应用于同一频点的半双工通信。
目前的半双工通信系统只能通过提高发射功率和接收灵敏度的方式来满足长传输 距离的需求。 如果主机和终端之间的衰减超过了限定值, 则只能将单频点半双工通信修 改为双频点全双工通信, 以便使用目前的双向放大器进行信号放大。 这样改动增加了成 本, 并多占用了频谱资源。 发明内容
本发明的目的在于提供一种能够解决现有技术中不能实现单频点双向放大的问题 的放大设备以及具有该设备的通信系统和方法。
本发明提供的双向放大设备包括放大器 (C) , 所述双向放大设备对单频点双向传 输的数据信号进行放大, 所述双向放大设备进一步包括:
传输方向判断装置, 用于判断输入该双向放大设备的数据信号的传输方向, 并根据 判断的传输方向发出开关控制信号; 和 开关装置, 用于根据开关控制信号切换其连接状态, 以使得放大器(C)对该传输 方向上的数据信号进行放大, 且放大后的数据信号传输至该传输方向上的接收端。
下述双向放大设备的技术方案为可选技术方案。
所述传输方向判断装置包括:
两个检波器, 分别用于检测两个传输方向上传输的数据信号的功率, 和
比较器, 用于比较所述两个检波器检测到的功率信号以确定传输方向, 并发出开关 控制信号。
所述传输方向判断装置进一步包括:
两个放大器 (E) 、 (G) , 用于分别放大两个检波器检测到的功率信号, 所述比较器比较所述放大器 (E) 、 (G)放大了的功率信号来确定传输方向。 所述传输方向判断装置根据从外部输入的收发控制信号来确定传输方向。
传输方向判断装置包括:
滤波器, 用于从数据信号的接收端或发送端发出的信号中获取收发控制信号; 解调器, 用于解调所述滤波器获取的收发控制信号, 并输出;
所述解调器解调后的收发控制信号作为开关控制信号, 控制开关装置的状态。 所述开关装置包括两个单刀双掷开关, 分别与放大器(C)的输入端和输出端相连。 本发明还提供一种单频点半双工通信系统, 包括至少一个第一通信端、至少一个第 二通信端、和位于第一通信端和第二通信端之间的双向放大设备,该双向放大设备包括: 放大器 (C) ;
传输方向判断装置, 用于判断输入该双向放大设备的数据信号的传输方向, 并根据 判断的传输方向发出开关控制信号; 和
开关装置, 用于根据幵关控制信号切换其状态以使得放大器 (C) 对该传输方向上 的数据信号进行放大, 且放大后的数据信号传输至该传输方向上的接收端
下述单频点半双工通信系统的技术方案为可选技术方案。
所述传输方向判断装置包括:
两个检波器, 分别用于检测两个传输方向上传输的数据信号的功率, 和
比较器, 用于比较所述两个检波器检测的功率信号来确定传输方向。
所述传输方向判断装置进一步包括:
两个放大器 (E) 、 ( G) , 用于分别放大两个检波器检测到的功率信号, 所述比较器比较所述放大器 (E) 、 (G)放大了的功率信号来确定传输方向。 所述传输方向判断装置根据第一通信端或第二通信端发送的收发控制信号来确定 传输方向。
所述第一通信端或第二通信端包括:
调制器, 用于调制该第一 /二通信终端发出的收发控制信号; 和
混合器, 用于混合所述调制器调制后的收发控制信号和数据信号, 并将其发送至双 向放大设备。
传输方向判断装置包括:
滤波器, 用于从第一 /二通信端发出的信号中获取所述收发控制信号, 和
解调器, 用于解调所述滤波器获取的收发控制信号, 并输出;
所述解调器解调后的收发控制信号作为幵关控制信号, 控制开关装置的状态。 所述开关装置包括两个单刀双掷开关, 分别与放大器(C)的输入端和输出端相连。 本发明还提供一种单频点半双工通信方法, 包括:
'判断需要进行放大的数据信号的传输方向;
根据判断出的传输方向, 放大器对该传输方向上的数据信号进行放大, 且放大后的 数据信号传输至该传输方向上的接收端。
下述方法的技术方案为可选技术方案。
所述判断传输方向的步骤包括,
检测两个传输方向上传输的数据信号的功率的步骤, 和
比较所述两个传输方向上传输的数据信号的功率来确定传输方向的步骤。
在判断传输方向的步骤中,利用和数据信号一起发送的收发控制信号来确定传输方 向。
依照本发明, 通过判断数据信号的传输方向, 并根据确定的传输方向并利用放大器 对该传输方向上传输的数据信号进行放大, 可以实现单频点双向传输的数据信号的放 大。 附图简要说明
图 1为现有技术的全双工通信系统的结构框图。
图 2为依照本发明第一实施方式的同频半双工通信系统的结构框图,其中,开关为 第一状态。
图 3为依照本发明第一实施方式的同频半双工通信系统的结构框图,其中,开关为 第二状态。
图 4为依照本发明第二实施方式的同频半双工通信系统的结构框图。 实施本发明的方式
下面, 参照图 2— 4对本发明实施方式的同频半双工通信系统、双向放大设备、单频 点半双工通信方法进行详细描述。 该同频半双工通信系统包括主机 10 (20), 双向放大 器 30 (40 )和多个终端 50,所述的多个终端 50通过分配网与双向放大器 30 (40)相连。 该双向放大器 30 (40 )用于放大主机 10 (20) 或终端 50发出的数据信号, 且主机 10 (20)和终端 50不会同时发送数据。该双向放大器 30 (40 )具有判断传输方向的功能, 且可以根据判断的传输方向利用一放大器 C对该传输的数据信号进行放大。
如图 2所示, 描述了依照本发明第一实施方式的同频半双工通信系统。 在该实施方 式中, 双向放大器 30釆用检波比较的方式来判断传输方向。
该双向放大器 30包括两个检波器 D和 F,分别与主机 10和终端 50连接,用于检测 主机 10和终端 50发射的数据信号的功率有效值; 两个放大器 E和 G, 分别与检波器 D 和 F连接, 用于放大检波器 D和 F的输出的功率有效值; 一比较器 H, 用于比较放大 器 E和 G的输出以确定传输方向, 并发出一开关控制信号; 单刀双掷开关 A和 B, 其 根据来自比较器 H的开关控制信号切换其状态,从而使得发送端发出的数据信号经过单 刀双掷开关 A传输至放大器 C的输入端, 放大器 C将该数据信号放大之后经由单刀双 掷开关 B传输至接收端。
下面, 详细描述依照本发明第一实施方式的同频半双工通信系统的工作过程。
当主机 10为发送端时, 主机 10发射的数据信号经检波器 D检测后, 输出给放大器 E进行放大, 比较器 H比较两端放大器 E和放大器 G的输出电压, 此时, 由于主机 10 处于发射状态, 放大器 E输出的电压显然高于放大器 G输出的电压, 比较器 H根据这 一比较结果发出开关控制信号,该开关控制信号传输给单刀双掷开关 A和 B,使得单刀 双掷开关 A和 B皆处于如图 2所示的第一状态。 从而, 主机 10的数据信号经过单刀双 掷开关 A输入放大器 C, 且被放大器 C放大之后经由单刀双掷开关 B传输给终端 50。
当终端 50为发送端时, 终端 50发射的数据信号经检波器 F检测后, 输出给放大器 E进行放大, 比较器 H比较两端放大器 E和放大器 G的输出电压, 并根据比较结果发 出开关控制信号, 使得单刀双掷开关 A和 B皆处于第二状态 (如图 3所示)。 从而, 终 端 50的数据信号经过单刀双掷开关 A输入放大器 C, 且被放大器 C放大之后经由单刀 双掷开关 B传输给主机 10。
如 , 4所示, 描述了依照本发明第二实施方式的同频半双工通信系统。 在该实施方 式中, 双向放大器 40根据来自主机 20的收发控制信号来判断传输方向。 当双向放大器 40接收到来自主机 20的收发控制信号时, 确定传输方向为从主机 20至终端 50。 当双 向放大器 40没有接收到来自主机 20的收发控制信号时, 确定传输方向为从终端 50至 主机 20。 .
在该实施方式中, 主机 20包括一调制器 J和一混合器 K。 当主机 20为发送端时, 所述调制器 J调制一收发控制信号, 并将调制后的收发控制信号发送给混合器 K, 混合 器 Κ将数据信号和调制后的收发控制信号混合在同一根电缆中,并将其一起发送至双向 放大器 40。
该双向放大器 40包括一滤波器 L, 用于从主机 20发出的信号 (包括数据信号和收 发控制信号)中检测出收发控制信号;一解调器 M, 用于解调滤波器 L检测到的收发控 制信号; 单刀双掷幵关 A和 B, 其根据来自解调器 M解调后的收发控制信号切换其状 态, 从而使得发送端发出的数据信号经过单刀双掷开关 A传输至放大器 C的输入端, 放大器 C将该数据信号放大之后经由单刀双掷开关 B传输至接收端。 本实施方式中的 单刀双掷开关 A、 B和放大器 C与第一实施方式相同。
当解调器 M输出了收发控制信号时, 单刀双掷开关 A、 B皆处于如图 4所示的第一 状态。 当解调器 M没有输出收发控制信号时, 单刀双掷开关 A、 B皆处于第二状态。
下面, 详细描述依照本发明第二实施方式的的同频半双工通信系统的工作过程。 当主机 20为发送端时, 主机 20通过调制器 J和混合器 K, 将数据信号和调制后的 收发控制信号一起发送至双向放大器 40。双向放大器 40的滤波器 L将收发控制信号从 主机 20发出的信号中检测出来并发送给解调器 Μ。解调器 Μ解调该收发控制信号之后, 控制单刀双掷开关 Α和 B, 使得单刀双掷开关 A和 B皆处于如图 3所示的第一状态。 从而, 主机 20的数据信号经过单刀双掷开关 A输入放大器 C, 且被放大器 C放大之后 经由单刀双掷开关 B传输给终端 50。
当终端 50为发送端时, 由于滤波器 L没有检测到收发控制信号, 因此单刀双掷开 关 A和 B皆处于第二状态。从而, 终端 50的数据信号经过单刀双掷开关 A输入放大器 C, 且被放大器 C放大之后经由单刀双掷开关 B传输给主机 20。
在该实施方式中,也可以利用终端 50发出的收发控制信号来控制开关的切换,其原 理与利用主机 20发出的收发控制信号来控制开关的切换相同, 在此不再详细描述。 依照本发明实施方式的技术方案, 通过检测主机和终端发送至双向放大器的数据信 号强度, 或者探测主机发出的收发控制信号来判断传输方向, 并根据该判断的传输方向 切换开关使得放大器对传输的数据信号进行放大, 从而实现了单频点传输双向信号, 占 用带宽只有现有技术带宽的一半。 即便是第二实施方式中使用了收发控制信号控制开关 的切换, 由于传输的是控制信号, 调制方式简单, 占用带宽也很小。 此外, 在本发明中, 仅使用一个放大器就实现了两个方向上数据信号的放大, 从而节省了成本。
虽然本发明已以较多的方式进行了表达, 但并不是用以限定本发明, 任何熟悉该技 术的人员, 在不脱离本发明的精神和范围内, 可以做各种改动和润饰, 因此本发明的保 护范围当视专利申请范围所界定者为准。

Claims

权利要求
1. 一种双向放大设备, 包括放大器(C) , 其特征在于, 所述双向放大设备对单频 点双向传输的数据信号进行放大, 所述双向放大设备进一步包括:
传输方向判断装置, 用于判断输入该双向放大设备的数据信号的传输方向, 并根据 判断的传输方向发出幵关控制信号; 和 '
开关装置, 用于根据开关控制信号切换其连接状态, 以使得放大器 (C)对该传输 方向上的数据信号进行放大, 且放大后的数据信号传输至该传输方向上的接收端。
2. 如权利要求 1所述的放大设备, 其特征在于, 所述传输方向判断装置包括: 两个检波器, 分别用于检测两个传输方向上传输的数据信号的功率, 和
比较器, 用于比较所述两个检波器检测到的功率信号以确定传输方向, 并发出开关 控制信号。
3.如权利要求 2所述的放大设备,其特征在于,所述传输方向判断装置进一步包括: 两个放大器 (E) 、 (G) , 用于分别放大两个检波器检测到的功率信号, 所述比较器比较所述放大器(E) 、 (G)放大了的功率信号来确定传输方向。
4. 如权利要求 1所述的放大设备, 其特征在于,
所述传输方向判断装置根据从外部输入的收发控制信号来确定传输方向。
5. 如权利要求 4所述的放大设备, 其特征在于, 传输方向判断装置包括: 滤波器, 用于从数据信号的接收端或发送端发出的信号中获取收发控制信号; 解调器, 用于解调所述滤波器获取的收发控制信号, 并输出;
所述解调器解调后的收发控制信号作为开关控制信号, 控制开关装置的状态。
6. 如权利要求 1一 5任一项所述的放大设备, 其特征在于,
所述开关装置包括两个单刀双掷开关, 分别与放大器(C)的输入端和输出端相连。
7.一种单频点半双工通信系统, 包括至少一个第一通信端、 至少一个第二通信端、 和位于第一通信端和第二通信端之间的双向放大设备, 其特征在于, 该双向放大设备包 括:
放大器(C) ;
传输方向判断装置, 用于判断输入该双向放大设备的数据信号的传输方向, 并根据 判断的传输方向发出幵关控制信号; 和
开关装置, 用于根据开关控制信号切换其状态以使得放大器 (C)对该传输方向上 的数据信号进行放大, 且放大后的数据信号传输至该传输方向上的接收端。
8. 如权利要求 7所述的半双工通信系统,其特征在于,所述传输方向判断装置包括: 两个检波器, 分别用于检测两个传输方向上传输的数据信号的功率, 和
比较器, 用于比较所述两个检波器检测的功率信号来确定传输方向。
9.如权利要求 8所述的半双工通信系统, 其特征在于, 所述传输方向判断装置进一 步包括:
两个放大器 (E) 、 (G) , 用于分别放大两个检波器检测到的功率信号, 所述比较器比较所述放大器 (E) 、 (G)放大了的功率信号来确定传输方向。
10.如权利要求 7所述的半双工通信系统,其特征在于,所述传输方向判断装置根据 第一通信端或第二通信端发送的收发控制信号来确定传输方向。
11.如权利要求 10所述的半双工通信系统, 其特征在于, 所述第一通信端或第二通 信端包括:
调制器, 用于调制该第一 /二通信终端发出的收发控制信号; 和
混合器, 用于混合所述调制器调制后的收发控制信号和数据信号, 并将其发送至双 向放大设备。
12. 如权利要求 11所述的半双工通信系统, 其特征在于, 传输方向判断装置包括: 滤波器, 用于从第一 /二通信端发出的信号中获取所述收发控制信号, 和
解调器, 用于解调所述滤波器获取的收发控制信号, 并输出;
所述解调器解调后的收发控制信号作为开关控制信号, 控制开关装置的状态。
13. 如权利要求 7_ 12任一项所述的半双工通信系统, 其特征在于,
所述幵关装置包括两个单刀双掷开关, 分别与放大器(C )的输入端和输出端相连。
14.一种单频点半双工通信方法, 其特征在于包括:
判断需要进行放大的数据信号的传输方向;
根据判断出的传输方向, 放大器对该传输方向上的数据信号进行放大, 且放大后的 数据信号传输至该传输方向上的接收端。
15.如权利要求 14所述的方法, 其特征在于, 所述判断传输方向的步骤包括, 检测两个传输方向上传输的数据信号的功率的步骤, 和
比较所述两个传输方向上传输的数据信号的功率来确定传输方向的步骤。
16. 如权利要求 14所述的方法, 其特征在于,
在判断传输方向的步骤中,利用和数据信号一起发送的收发控制信号来确定传输方 向。
PCT/CN2006/002627 2006-02-17 2006-10-08 Amplificateur bidirectionnel, système de communication semi-duplex et procédé correspondant WO2007093096A1 (fr)

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Citations (3)

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US5105166A (en) * 1989-11-30 1992-04-14 Raytheon Company Symmetric bi-directional amplifier
CN1345122A (zh) * 2000-09-30 2002-04-17 深圳市劲成光纤网络设备有限公司 专用于铁路列车的双向放大器
CN2534754Y (zh) * 2002-04-26 2003-02-05 徐汉阳 有线电视网络智能上行放大器

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US5105166A (en) * 1989-11-30 1992-04-14 Raytheon Company Symmetric bi-directional amplifier
CN1345122A (zh) * 2000-09-30 2002-04-17 深圳市劲成光纤网络设备有限公司 专用于铁路列车的双向放大器
CN2534754Y (zh) * 2002-04-26 2003-02-05 徐汉阳 有线电视网络智能上行放大器

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