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1. 发明授权

US5440561A Method for establishing frame synchronization within a TDMA communication system 失效
标题翻译：用于在TDMA通信系统内建立帧同步的方法
公开(公告)号：US5440561A
公开(公告)日：1995-08-08
申请号：US767726
申请日：1991-09-30
申请人： Alton P. Werronen
发明人： Alton P. Werronen
IPC分类号： H04B7/26 , H04J3/06 , H04W36/08 , H04W56/00
CPC分类号： H04J3/0682 , H04B7/2684 , H04W56/00
摘要： In a cellular TDMA communication system, prior to the handoff of a mobile unit (225) from a serving base-site (200) to a target base-site, (205 or 210) , the target base-site (205 or 210) establishes frame synchronization with the serving base-site (200). In this effort, first, the serving base-site timing is determined. Next, a timing difference between the serving base-site timing and a target base-site timing is calculated. Thereafter, frame positions within the serving base-site TDMA traffic channels are identified as a function of the timing difference in order to establish frame synchronization. Armed with this information, target base-sites (205 and 210) can continuously monitor all serving base-site (200) traffic channels for respective RSSI values. Preserving this information in memory enables fast and accurate signal strength determinations upon handoff.
摘要翻译：在蜂窝TDMA通信系统中，在将移动单元（225）从服务基站（200）切换到目标基站（205或210）之前，目标基站（205或210）与服务基站（200）建立帧同步。在这个努力中，首先，确定服务基站定时。接下来，计算服务基站定时与目标基站定时之间的定时差。此后，为了建立帧同步，将服务基站TDMA业务信道内的帧位置识别为定时差的函数。有了这些信息，目标基站（205和210）可以连续监控所有服务的基站（200）业务信道的RSSI值。在存储器中保存该信息可以在切换时快速准确地确定信号强度。

2. 发明授权

US5031193A Method and apparatus for diversity reception of time-dispersed signals 失效
标题翻译：用于分集接收时间分散信号的方法和装置
公开(公告)号：US5031193A
公开(公告)日：1991-07-09
申请号：US435650
申请日：1989-11-13
申请人： Frederick G. Atkinson , Gerald P. Labedz , Duane C. Rabe , Joseph J. Schuler , Alton P. Werronen
发明人： Frederick G. Atkinson , Gerald P. Labedz , Duane C. Rabe , Joseph J. Schuler , Alton P. Werronen
IPC分类号： H04B7/08 , H04L1/06
CPC分类号： H04B7/0845 , H04L1/06 , H04B7/084 , H04B7/0857 , H04B7/0888
摘要： A method and appartus for diversity reception in a communication system wherein at least a dual branch receiver is provided with a stored replica of expected reference information that is correlated with the received time-dispersed signals to obtain an estimate of the transmission channel's impulse response as seen by each branch, and determine, among other things, phase error between the branch local oscillators and the time-dispersed signals. Matched filters are constructed which then coherently align the time-dispersed signals from each branch with that branch's local oscillator, also constituting the first part of the equalization. The diversity processing stage may perform bit by bit selection on the re-aligned signals, maximal ratio combining of the re-aligned signals, or equal gain combining of the re-aligned signals, following each by a sequence estimation which uses similarly selected or combined channel distortion compensation parameters to complete the equalization process on the new signal. In digital modulated carrier systems, providing expected reference information eliminates the neeed for carrier recovery feedback for each branch while performing part of the equalization process.

3. 发明授权

US5203010A Radio telephone system incorporating multiple time periods for communication transfer 失效
标题翻译：包含多个时间段用于通信传输的无线电话系统
公开(公告)号：US5203010A
公开(公告)日：1993-04-13
申请号：US612292
申请日：1990-11-13
申请人： Kenneth A. Felix , Alton P. Werronen , Thomas B. Hart , Scott A. Hardman , Thomas G. Hulsebosch
发明人： Kenneth A. Felix , Alton P. Werronen , Thomas B. Hart , Scott A. Hardman , Thomas G. Hulsebosch
IPC分类号： H04W36/30
CPC分类号： H04W36/30
摘要： A cellular radiotelephone system transfers a call from a source base-site (200) to one target base-site (205,210). A source base-site (200) in the first RF coverage area (100) measures the signal strength (RSSI.sub.S) of a mobile (225), provides a forecasted signal strength (RSSI.sub.F) representing a would-be power increase of the mobile (225) and sets up two time windows. The source base-site (200) sends the measured and forecasted signal strengths to candidate target base-sites (205,210) found by the mobile (225) which measure the mobile (225) signal strength (RSSI.sub.T) and compare it once to RSSI.sub.S plus a hysteresis value. If RSSI.sub.T is greater than RSSI.sub.S, the call is transferred to the best responding cell. If RSSI.sub.T is below RSSI.sub.S, RSSI.sub.T is compared to RSSI.sub.F. During this time, the mobile 225 will increase power at the end of the first time window. If RSSI.sub.T is ever greater than RSSI.sub.F at any of the candidate target base-sites (205,210), the call is transferred to the responding target base-site (205,210). If the source base-site (200) receives no responses during the second time window, the process ends.
摘要翻译：蜂窝无线电话系统将呼叫从源基站（200）传送到一个目标基站（205,210）。第一RF覆盖区域（100）中的源基站（200）测量移动站（225）的信号强度（RSSIS），提供表示移动站的功率增加的预测信号强度（RSSIF） 225）并设置两个时间窗口。源基站（200）将测量的和预测的信号强度发送到测量移动（225）信号强度（RSSIT）的移动站（225）找到的候选目标基站（205,210），并将其与RSSIS plus 滞后值。如果RSSIT大于RSSIS，则将呼叫转移到最佳响应单元。如果RSSIT低于RSSIS，则将RSSIT与RSSIF进行比较。在此期间，移动台225将在第一时间窗口结束时增加功率。如果任何候选目标基站（205,210）的RSSIT大于RSSIF，则呼叫被转移到响应目标基站（205,210）。如果源基站（200）在第二个时间窗口内没有收到响应，则该过程结束。

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