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    • 4. 发明申请
    • USING RECEIVE DIVERSITY TO EXTEND STANDBY TIME IN QPCH MODE
    • 使用接收多样性扩展QPCH模式下的待机时间
    • WO2006110877A2
    • 2006-10-19
    • PCT/US2006013883
    • 2006-04-10
    • QUALCOMM INCTU KUANG-HSUANKURAPATI NAGABHUSHANA RAO
    • TU KUANG-HSUANKURAPATI NAGABHUSHANA RAO
    • H04B7/08H04B1/16
    • H04W52/0245H04B7/0882Y02D70/00Y02D70/444
    • The standby time of a CDMA cell phone is extended by using two receive chains to monitor the Quick Paging Channel (QPCH) when the signal-to-noise ratio falls within a predetermined range. Monitoring the QPCH saves battery power by obviating the need to monitor the general paging message unless quick paging (PI) bits are set. The QPCH is not monitored, however, in noisy environments where PI bits are incorrectly detected causing the paging message to be needlessly monitored. Power is saved by monitoring the QPCH in noisier environments without increasing the incorrect detection rate. Incorrect detection is reduced in the predetermined range by using an additional receive chain to achieve receive diversity. Although additional power is consumed by the second receive chain in the predetermined range, the power saved by not demodulating the paging message at each slot more than compensates for the additional power consumed by the second receive chain.
    • 当信号噪声比落在预定范围内时,通过使用两个接收链来监视CDMA蜂窝电话的待机时间来监视快速寻呼信道(QPCH)。 除非快速寻呼(PI)位被设置,否则监视QPCH可以通过消除监视通用寻呼消息的需要来节省电池电量。 然而,在不正确检测到PI位导致寻呼消息被不必要地监视的嘈杂环境中,QPCH不被监视。 通过在嘈杂的环境中监视QPCH来节省功耗,而不会增加错误的检测率。 通过使用额外的接收链来实现接收分集,在预定范围内减少了不正确的检测。 虽然第二接收链在预定范围内消耗额外的功率,但是通过不解调每个时隙处的寻呼消息而节省的功率多于补偿第二接收链消耗的附加功率。