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1. 发明申请

WO1997023071A1 ERROR CORRECTING TIMING REFERENCE DISTRIBUTION 审中-公开
标题翻译：错误修正时间参考分配
公开(公告)号：WO1997023071A1
公开(公告)日：1997-06-26
申请号：PCT/US1996019653
申请日：1996-12-13
申请人： TELEFONAKTIEBOLAGET LM ERICSSON , ERICSSON INC.
发明人： TELEFONAKTIEBOLAGET LM ERICSSON , ERICSSON INC. , JANSSON, Johan
IPC分类号： H04J03/06
CPC分类号： H04L7/0066 , H04J3/0602 , H04J3/0685 , H04L7/042
摘要： A distribution reference signal is described for use in synchronizing data transmission. The distribution reference signal includes a digital symbol pulse train having a rate much higher than the actual reference frequency represented. A fixed group of symbols is used to identify a low frequency signal event or reference pulse. A second group of sequence symbols indicates continuous phase information. The symbols used to identify the reference pulse are significantly different from the other phase information facilitating identification of the reference pulse. By encoding a known sequence of symbols to represent the phase information in the reference signal, an increased amount of frequency information can be propagated as compared with a single pulse aiding the detection and correction of signalling errors as the errors will break the expected symbol sequence. A system can then identify and correct or choose to ignore the errors based on the effect the errors will have on the system performance.
摘要翻译：描述分配参考信号用于同步数据传输。分配参考信号包括具有比所表示的实际参考频率高得多的速率的数字符号脉冲串。使用固定的符号组来识别低频信号事件或参考脉冲。第二组序列符号表示连续相位信息。用于识别参考脉冲的符号与有助于识别参考脉冲的其它相位信息显着不同。通过编码已知的符号序列来表示参考信号中的相位信息，与单个脉冲相比，可以传播增加的频率信息量，这有助于检测和纠正信令错误，因为错误将会破坏预期的符号序列。然后，系统可以基于错误对系统性能的影响来识别和更正或选择忽略错误。

2. 发明申请

WO1997023047A2 DISCRETE PHASE LOCKED LOOP 审中-公开
标题翻译：分离相锁定环路
公开(公告)号：WO1997023047A2
公开(公告)日：1997-06-26
申请号：PCT/US1996019652
申请日：1996-12-13
申请人： TELEFONAKTIEBOLAGET LM ERICSSON , ERICSSON INC.
发明人： TELEFONAKTIEBOLAGET LM ERICSSON , ERICSSON INC. , JANSSON, Johan
IPC分类号： H03L07/099
CPC分类号： H03L7/0993 , H04W56/0035
摘要： A discrete phase locked loop and method for supporting global synchronization of data communications in a mobile communications system is disclosed. In order to provide for air frame synchronization, air frame data clocks and a synchronization signal must be phase locked to a global time reference signal. This is accomplished through a fully discrete phase locked loop in ASIC on software wherein a state machine is clocked by a high frequency, high accuracy, fixed frequency source already available in the radio terminal equipment. The state machine generates the required air frame data clocks and synchronization signals by completing a counter cycle. At regular intervals, this counter can skip, or double step, for one count to adjust the output phase closer to the phase of the reference signal. The interval for which this correction is maintained is settable by an interval counter. This implementation mimics an elliptic low pass filter.
摘要翻译：公开了用于支持移动通信系统中的数据通信的全局同步的离散锁相环和方法。为了提供空中帧同步，空中帧数据时钟和同步信号必须被锁相到全局时间参考信号。这通过软件中的ASIC中的完全离散的锁相环实现，其中状态机由无线电终端设备中已经可用的高频，高精度，固定频率源来计时。状态机通过完成一个反周期来生成所需的空中帧数据时钟和同步信号。定时间隔时，该计数器可以跳过或双步进行一个计数，以调整输出相位更靠近参考信号的相位。保持该校正的间隔可以通过间隔计数器来设定。该实现模拟椭圆低通滤波器。

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