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1.发明授权
公开(公告)号：US6144861A
公开(公告)日：2000-11-07
申请号：US55781
申请日：1998-04-07
摘要： The transmit power of a base station transmission to a mobile station is advantageously controlled. The base station receives a signal from the mobile station and determines a signal-to-interference ratio (SIR) associated with the received signal. The base station controls its transmit power to the mobile station using the determined SIR value in conjunction with a transmit power control command received from the mobile station. When the mobile station is in the process of a soft handover involving two or more base stations, each of those base stations determines an SIR value associated with a signal received from the mobile station. Moreover, each of the base stations controls its respective power using both the power control command received from the mobile station and the SIR determined by that base station. Similarly, when the mobile station is in the process of softer handover involving two or more sectors of a single base station, the SIR associated with a signal received from the mobile station in each of those base station sectors is determined and used to control the respective power of each base station sector in conjunction with a power control command received from the mobile station.
摘要翻译： 有利地控制基站传输到移动台的发射功率。 基站从移动站接收信号，并确定与接收信号相关联的信号干扰比（SIR）。 结合从移动台接收到的发射功率控制命令，基站使用确定的SIR值来控制其对移动站的发射功率。 当移动台处于涉及两个或多个基站的软切换的过程中时，这些基站中的每个基站确定与从移动台接收的信号相关联的SIR值。 此外，每个基站使用从移动台接收的功率控制命令和由该基站确定的SIR来控制其各自的功率。 类似地，当移动站处于涉及单个基站的两个或更多个扇区的更软切换的过程中时，确定与从这些基站扇区中的每一个中的移动站接收到的信号相关联的SIR，并用于控制相应的 结合从移动台接收的功率控制命令，每个基站扇区的功率。
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公开(公告)号：US06421169B1
公开(公告)日：2002-07-16
申请号：US09368468
申请日：1999-08-02
申请人： Dag Bonnedal , Johan Sandell , Magnus Sundelin
发明人： Dag Bonnedal , Johan Sandell , Magnus Sundelin
IPC分类号： G02B628
CPC分类号： H04B10/291 , H01S3/06758 , H01S3/1301 , H04B10/2941 , H04B2210/003
摘要： An optical amplifier device intended for WDM light signals comprises a preamplifier (3) and a power amplifier (11) of the optical fiber amplifier type, which are connected in series and have gain curves dependent on the wavelength. A controllable attenuator (5) is connected between the amplifiers (3 and 11) and is controlled by a control device (7). The signal input to the preamplifier (3) has a low power and is amplified to provide an output signal where the signals of the input channels have been amplified with different gains. The input signal of the power amplifier (11) then has a larger power resulting in a gain characteristic different from that of the preamplifier (3). By adapting the attenuation of the attenuator (5) for variations in the input signal the gain characteristic of the power amplifier (11) can be set so that the signal output from the amplifier device has a spectral dependence that is the same as the original spectral dependence obtained without variations. Also, the same spectral dependence can be maintained when the pump light power of the power amplifier is changed and then the total amplifier gain is changed, by adapting the attenuation of the attenuator (5) so that the gain of the power amplifier is not changed. In the amplifier the lower possible noise from the preamplifier stage is added to the input signal and the full output power is always available from the power amplifier. If the input signal is e.g. increased the SNR of the signals passing through the amplifier is correspondingly improved. This improves the performance of an optical network in which the amplifier is used.
摘要翻译： 用于WDM光信号的光放大器装置包括前置放大器（3）和光纤放大器类型的功率放大器（11），其串联连接并且具有取决于波长的增益曲线。 可控衰减器（5）连接在放大器（3和11）之间，由控制装置（7）控制。 输入到前置放大器（3）的信号具有低功率并被放大以提供输出信号，其中输入通道的信号已经以不同的增益被放大。 然后，功率放大器（11）的输入信号具有较大的功率，导致与前置放大器（3）的增益特性不同的增益特性。 通过使衰减器（5）的衰减适应于输入信号的变化，可以设置功率放大器（11）的增益特性，使得从放大器装置输出的信号具有与原始频谱相同的频谱依赖性 依赖性没有变化。 此外，通过改变衰减器（5）的衰减，使得功率放大器的增益不变，当功率放大器的泵浦光功率改变然后总放大器增益改变时，可以保持相同的频谱相关性 。 在放大器中，来自前置放大器级的较低可能的噪声被添加到输入信号，并且总输出功率总是从功率放大器可用。 如果输入信号是例如 相应地提高通过放大器的信号的SNR增加。 这改善了使用放大器的光网络的性能。
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公开(公告)号：US6091869A
公开(公告)日：2000-07-18
申请号：US429487
申请日：1999-10-29
申请人： Magnus Sundelin
发明人： Magnus Sundelin
CPC分类号： G02B6/29383 , H04J14/0204 , H04J14/0205 , H04J14/0213 , H04J14/0217 , G02B6/29317 , G02B6/29332
摘要： An add/drop (7) node for an optical fiber network of WDM type has preamplifiers (19, 21) connected to the input fibers (3, 11). Part of the incoming signal power is tapped off by means of drop couplers or splitters (47, 49) and the tapped-off power is provided to a demultiplexer (51) where WDM information channels to be extracted from the network in the node are separated from each other and then fed to opto-electrical receivers (15). WDM information channels to be added in the node from electro-optical transmitters (17) are first combined in a multiplexer (61), the resulting signal being provided to add couplers (57, 59) to which also the signals incoming to the node are provided so that a combined signal is obtained for transmission to the opposite side of the node (7). Channels are thus added in the node to channels passing substantially ininterrupedly through the node. In order to have a low attenuation of the passing signals, the power per channel in the added signal is given approximately the same level as the power of each passing channel by an optical amplifier (65, 67) arranged in the input line to the add coupler from the multiplexer (61). By this arrangement it is possible to maintain a low attenuation of the passing signals within the optical add/drop node, since no extra attenuating devices are needed for the light signal containing the passing channels. The signal to noise ratio of these channels can thus be kept high.
摘要翻译： 用于WDM型光纤网络的分插（7）节点具有连接到输入光纤（3,11）的前置放大器（19,21）。 通过分支耦合器或分离器（47,49）对输入信号功率的一部分进行分接，并且将分接电源提供给解复用器（51），其中要从节点中的网络提取的WDM信息信道被分离 彼此之间，然后馈送到光电接收器（15）。 首先在多路复用器（61）中组合要从电光发射机（17）在节点中添加的WDM信息信道，所产生的信号被提供以添加耦合器（57,59），其中进入节点的信号也是 被提供使得获得用于传输到节点（7）的相对侧的组合信号。 因此，节点中的信道被添加到通过基本上中断通过节点的信道。 为了具有通过信号的低衰减，通过布置在输入线中的光放大器（65,67）将附加信号中每通道的功率与每个通过通道的功率大致相同， 耦合器（61）。 通过这种布置，由于对于包含通过通道的光信号不需要任何额外的衰减装置，所以可以保持光插入节点内的通过信号的低衰减。 因此，这些通道的信噪比可以保持较高。
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