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    • 8. 发明授权
    • Method and apparatus for optimizing transmitter power efficiency
    • 用于优化发射机功率效率的方法和装置
    • US07852968B2
    • 2010-12-14
    • US12276650
    • 2008-11-24
    • Wen Yen ChanXin JinQingzhong Jiao
    • Wen Yen ChanXin JinQingzhong Jiao
    • H04L25/49
    • H04W52/52H03G3/3042H04L27/2614
    • A peak to average power ratio signal is generated from a first mapping function that selects the peak to average power ratio signal that corresponds to the data rate or data format of the signal to be transmitted. The selected peak to average power ratio signal is summed with a desired average transmit power signal. The resulting summation signal is input to a second effectively continuously valued mapping function comprising a table that has a plurality of power amplifier control signal values each with a corresponding peak transmit power. Each peak transmit power signal value results in a power amplifier control signal value that achieves the best possible transmitter power efficiency while still meeting out of band spurious emissions and waveform quality requirements. The summation signal value maps to one of the power amplifier control signal value that is then used to adjust a parameter such as bias of the power amplifier.
    • 从选择对应于要发送的信号的数据速率或数据格式的峰均功率比信号的第一映射函数产生峰均功率比信号。 所选择的峰均功率比信号与期望的平均发射功率信号相加。 所得到的求和信号被输入到包括具有多个具有相应的峰值发射功率的多个功率放大器控制信号值的表的第二有效连续值映射函数。 每个峰值发射功率信号值导致功率放大器控制信号值,其在仍然满足带外杂散发射和波形质量要求的情况下实现最佳发射机功率效率。 求和信号值映射到功率放大器控制信号值中的一个,然后用于调整功率放大器的偏置等参数。
    • 10. 发明申请
    • Methods And Apparatus For Controlling A Gain State Of A Wireless Receiver Operating In An Idle Mode
    • 用于控制在空闲模式下工作的无线接收器的增益状态的方法和装置
    • US20090068972A1
    • 2009-03-12
    • US12268011
    • 2008-11-10
    • Xin JinQingzhong JiaoTom Yun Sang Young
    • Xin JinQingzhong JiaoTom Yun Sang Young
    • H04B1/18
    • H04W52/0283H03G3/3052Y02D70/122Y02D70/1242Y02D70/144
    • The settling time of a wireless receiver is reduced by providing a previously utilized gain control state value to an amplifier of a receiver front end during a warm-up portion of a wake-up period of the wireless receiver which follows a sleep period. One illustrative method includes the steps of receiving a notification signal which indicates that the wireless receiver is to be placed in a sleep mode, reading a gain control state value from a gain controller based on receiving the notification signal, storing the gain control state value in memory, providing the stored gain control state value from the memory to the wireless receiver during a warm-up period of a second wake-up period following the first wake-up period, and providing a gain control state value from the gain controller to the wireless receiver based on a signal level of a currently received signal of the wireless receiver after the warm-up period.
    • 通过在随后的睡眠周期的无线接收机的唤醒周期的预热部分期间向接收器前端的放大器提供先前利用的增益控制状态值来减少无线接收机的建立时间。 一种说明性方法包括以下步骤:接收指示无线接收机将处于睡眠模式的通知信号,基于接收到通知信号从增益控制器读取增益控制状态值,将增益控制状态值存储在 存储器,在所述第一唤醒周期之后的第二唤醒周期的预热周期期间,将所存储的增益控制状态值从所述存储器提供给所述无线接收器,以及从所述增益控制器向所述增益控制器提供增益控制状态值 无线接收机基于预热时段之后的无线接收机的当前接收信号的信号电平。