公开(公告)号：US5473284A

公开(公告)日：1995-12-05

申请号：US313149

申请日：1994-11-30

申请人： Arto Jantti ,  Risto Saukkonen ,  Veli Juola ,  Lassi Vaananen ,  Tapani Karki

发明人： Arto Jantti ,  Risto Saukkonen ,  Veli Juola ,  Lassi Vaananen ,  Tapani Karki

IPC分类号： H03L7/06 ,  H03L1/00 ,  H03L3/00 ,  H03L7/10 ,  H04Q7/36

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）。

公开(公告)号：US5307371A

公开(公告)日：1994-04-26

申请号：US910125

申请日：1992-09-15

申请人： Veli Juola

发明人： Veli Juola

IPC分类号： H04B7/26 ,  H04N1/00

CPC分类号： H04B7/2643

摘要： A radio transceiver system is provided with transceivers for transmitting an outbound signal at least at one transmitting frequency and for receiving an inbound signal at least at one receiving frequency. Baseband signal processors are also provided for baseband processing of the outbound signal before conversion up to the transmitting frequency and of the received inbound signal after conversion down from the receiving frequency. To reduce cable laying in equipment racks and to simplify the realization of baseband frequency hopping, a bidirectional serial digital transmission channel is provided between transceivers and baseband signal processors, whereby both the inbound signal from a transceiver and the outbound signal applied to the transceiver are time-division multiplexed to said bidirectional serial digital transmission channel.

摘要翻译： 无线电收发器系统设置有收发器，用于至少在一个发射频率处发送出站信号，并且至少在一个接收频率处接收入站信号。 还提供基带信号处理器，用于在转换到发射频率之前的出站信号的基带处理和从接收频率转换后的接收到的入站信号。 为了减少设备机架中的电缆铺设并简化基带跳频的实现，收发器和基带信号处理器之间提供双向串行数字传输通道，从而收发器的入站信号和应用于收发器的出站信号都是时间 分解复用到所述双向串行数字传输信道。