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    • 4. 发明授权
    • Method and apparatus of forward link and reverse link power control in a cellular wireless communication system
    • 蜂窝无线通信系统中前向链路和反向链路功率控制的方法和装置
    • US07480516B1
    • 2009-01-20
    • US10975000
    • 2004-10-28
    • Xixian ChenGuoqiang XueMark HarrisWeigang Li
    • Xixian ChenGuoqiang XueMark HarrisWeigang Li
    • H04B7/00H04Q7/20
    • H04W52/56H04B1/712H04W52/143
    • A cellular wireless communication system includes base transceiver stations and mobile stations that operate with a closed loop power control. The mobile tracking is performed based on the lock in and lock out thresholds by the base transceiver stations. A forward link power control bit is decoded from the reverse channel. An additional threshold is introduced for determining at the base transceiver station whether the decoded forward link power control bit is valid or invalid. The finger energies obtained from a finger processor formed by a RAKE receiver of the base transceiver station are compared to the additional validation threshold. The additional validation threshold is independent of the tracking thresholds and usually greater than them. The validation performance may not be affected by low signal/noise. The forward link traffic channel gain of the base transceiver station is controlled in response to the invalidity of the decoded forward power control bit. The decoding of the reverse link power control bit and the validity determination of the decoded reverse link power control bit are performed by similar methods to those of the forward link power control bit. With improved validation methods, the forward link and reverse link transmission power is more accurately controlled.
    • 蜂窝无线通信系统包括基站收发台和利用闭环功率控制工作的移动站。 移动跟踪基于基站收发台的锁定和锁定阈值来执行。 前向链路功率控制位从反向信道解码。 引入额外的阈值,用于在基站收发台确定解码的前向链路功率控制位是有效还是无效。 从由基地收发台的RAKE接收机形成的手指处理器获得的手指能量与附加确认阈值进行比较。 额外的验证阈值与跟踪阈值无关,通常大于它们。 验证性能可能不受低信号/噪声的影响。 响应于解码的正向功率控制位的无效性,控制基站收发器的前向链路业务信道增益。 反向链路功率控制位的解码和解码的反向链路功率控制位的有效性确定通过与前向链路功率控制位的方法类似的方法来执行。 通过改进的验证方法,更准确地控制前向链路和反向链路传输功率。
    • 7. 发明授权
    • Method for determination of discontinuous transmission, frame erasure, and rate
    • 确定不连续传输,帧擦除和速率的方法
    • US07505534B1
    • 2009-03-17
    • US10690604
    • 2003-10-23
    • Guoqiang XueXixlan Chen
    • Guoqiang XueXixlan Chen
    • H03D1/00
    • H04L1/20H04L1/0045H04L1/0061H04L1/201
    • This invention enables determining whether a received frame is an erasure, a DTX mode frame or a CONT mode frame, using a metric m derived from the log likelihood ratio (LLR). The new metric is obtained by calculating the mean for the LLRs for a frame; a threshold T for this metric is also established. A received frame is declared a CONT frame if the CRC value indicates a successfully recovered frame, and m>T. A received frame is a DTX frame if m T. The mean absolute LLR may also be used for determining the transmission rate of the system. In this case, a voice frame is decoded for all rates available; the transmission rate is that which corresponds to a passed CRC and has the highest m.
    • 本发明能够使用从对数似然比(LLR)导出的度量m来确定接收到的帧是否为擦除,DTX模式帧还是CONT模式帧。 通过计算帧的LLR的平均值来获得新的度量; 也建立了该度量的阈值T. 如果CRC值表示成功恢复帧,则m> T,则将接收到的帧声明为CONT帧。 如果m T,则声明一个帧被擦除。 平均绝对LLR也可用于确定系统的传输速率。 在这种情况下,对所有可利用的速率解码语音帧; 传输速率是对应于通过的CRC并且具有最高的m的传输速率。