Oscillator frequency control loop based on long term average of
frequency difference
    1.
    发明授权
    Oscillator frequency control loop based on long term average of frequency difference 失效
    基于频率差的长期平均振荡器频率控制回路

    公开(公告)号:US5473284A

    公开(公告)日:1995-12-05

    申请号:US313149

    申请日:1994-11-30

    CPC分类号: H03L7/10 H03L3/00

    摘要: An oscillator unit for a base station or the like in a digital cellular radio network. The oscillator unit includes an adjustable oven stabilized crystal oscillator (21). The oscillator unit additionally includes a non-volatile memory (27), in which is stored a control information defining the frequency of the oven stabilized crystal oscillator (21) at the start of the oscillator unit, apparatus (30, 31, 32) for deriving a reference frequency from a fixed digital transmission connection, such as a PCM connection, between the base station and the remaining cellular radio network, a frequency control loop (21, 22, 23, 24) for maintaining a long-term stability for the oven stabilized crystal oscillator (21) on the basis of a long-term average of the difference between the frequency of the oven stabilized crystal oscillator and the reference frequency.

    摘要翻译: PCT No.PCT / FI93 / 00129 Sec。 371日期1994年11月30日 102(e)1994年11月30日日期PCT 1993年3月30日PCT公布。 出版物WO93 / 20619 日期:1993年10月14日。在数字蜂窝无线电网络中用于基站等的振荡器单元。 振荡器单元包括可调节的炉子稳定的晶体振荡器(21)。 所述振荡器单元还包括非易失性存储器(27),其中存储了在所述振荡器单元的起始处定义所述恒温晶体振荡器(21)的频率的控制信息,所述装置(30,31,32)用于 从基站和剩余的蜂窝无线电网络之间的固定数字传输连接(例如PCM连接)导出参考频率,频率控制回路(21,22,23,24),用于维持对于所述基站的长期稳定性 基于炉稳定晶体振荡器的频率与参考频率之间的差的长期平均值来确定炉稳定晶体振荡器(21)。

    Measurement of gain error in a base station receiver, and improvement in
field strength measurement
    2.
    发明授权
    Measurement of gain error in a base station receiver, and improvement in field strength measurement 失效
    基站接收机增益误差的测量,场强测量的改进

    公开(公告)号:US5790944A

    公开(公告)日:1998-08-04

    申请号:US619716

    申请日:1996-06-26

    CPC分类号: H04B17/318 H04B17/21

    摘要: For measuring gain error in a receiver of a base station of a cellular system and for improving field strength measurement, a signal received by the base station is measured before and after a receiver unit. The power level is corrected after the receiver unit to correspond to the power level of the signal determined before the receiver unit. For this purpose, before the receiver unit an accurate detector of the power level of the signal is provided, the power level of the signal detected by the detector being compared to the power level measured after the receiver.

    摘要翻译: PCT No.PCT / FI94 / 00435 Sec。 371日期1996年6月26日第 102(e)日期1996年6月26日PCT 1994年9月27日PCT公布。 公开号WO95 / 09488 日期1995年04月16日为了测量蜂窝系统的基站的接收机中的增益误差,并且为了改善场强测量,在接收机单元之前和之后测量由基站接收的信号。 在接收器单元之后校正功率电平以对应于在接收器单元之前确定的信号的功率电平。 为此,在接收器单元之前,提供了信号功率电平的精确检测器,将检测器检测到的信号的功率电平与接收器之后测量的功率电平进行比较。