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1.
公开(公告)号:US06559894B2
公开(公告)日:2003-05-06
申请号:US09879662
申请日:2001-06-11
IPC分类号: H04N5217
CPC分类号: H04L1/0059 , H04L1/0071 , H04L25/03133 , H04L2025/03382 , H04L2025/0377
摘要: A block-adaptive method of performing equalization on a signal received over a broadcast system, includes providing a set of predetermined symbols that correspond to symbols in a data field synchronization segment of a data field having a plurality of segments wherein a data frame having at least two of these data fields is transmitted over the signal in the broadcast system during a block-time interval, correlating complex samples of the signal with the set of predetermined symbols to extract a corresponding impulse response during the block-time interval, selecting a phase identifying the start of the block-time interval from the correlated complex samples, estimating an equalizer filter using the set of predetermined symbols and an initial data field synchronization segment provided at the start of the block-time interval, updating the equalizer filter using subsequent complex samples of the signal to extract a subsequent impulse response and correlate with a reference segment, wherein the reference segment corresponds to either the predetermined symbol sequence or a partial decision feedback segment.
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公开(公告)号:US5918720A
公开(公告)日:1999-07-06
申请号:US914987
申请日:1997-08-20
CPC分类号: G07D11/0093
摘要: A safe providing both permanent and temporary storage of money. The safe uses bill validators to accurately count cash deposited into a secure area. A control system records the amount of money entered into both the temporary and permanent storage and the amount withdrawn from the temporary storage. The control system includes both a primary and an auxiliary memory for storing an audit trail of these transactions. Further, the control system utilizes an encryption code for communications between a main controller and each of the door controllers.
摘要翻译: 一个提供永久和临时储存金钱的保险箱。 该保险箱使用账单验证器来准确计算存入安全区域的现金。 控制系统记录在临时和永久存储中输入的金额以及从临时存储中撤出的金额。 控制系统包括用于存储这些事务的审计跟踪的主存储器和辅助存储器。 此外,控制系统利用用于主控制器和每个门控制器之间的通信的加密代码。
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