公开(公告)号：US06718503B1

公开(公告)日：2004-04-06

申请号：US10035118

申请日：2002-01-04

申请人： Gregory Lerner ,  Dan Raphaeli ,  Oren Kaufman ,  Boris Zarud

发明人： Gregory Lerner ,  Dan Raphaeli ,  Oren Kaufman ,  Boris Zarud

IPC分类号： H03M1300

CPC分类号： H03M13/2757 ,  H04B3/542 ,  H04B2203/5408

摘要： A interleaver/de-interleaver mechanism for reducing the latency of transmitted interleaved codewords. The interleaver/de-interleaver mechanism utilizes a shortened first codeword which functions to offset the interleaving and transmission on subsequent codewords so as to achieve reduced latency depending on the degree of shortening applied. The interleaver/de-interleaver mechanism is particularly useful in power line carrier based systems to reduce the exposure to burst errors by providing interleaving with minimal latency penalty.

摘要翻译： 一种用于减少传输的交错码字的等待时间的交织器/去交织器机制。 交织器/解交织器机制利用缩短的第一码字，其用于抵消后续码字上的交织和传输，以便根据应用的缩短程度来实现缩短的等待时间。 交织器/解交织器机制在基于电力线载波的系统中特别有用，通过以最小的延迟代价提供交织来减少突发错误的暴露。

公开(公告)号：US07463709B2

公开(公告)日：2008-12-09

申请号：US10829532

申请日：2004-04-21

申请人： Dan Raphaeli ,  Oren Kaufman ,  Evgeny Bassin ,  Boris Zarud

发明人： Dan Raphaeli ,  Oren Kaufman ,  Evgeny Bassin ,  Boris Zarud

IPC分类号： H04I7/00

CPC分类号： H04B1/7075 ,  H04B1/70755 ,  H04B1/7095 ,  H04B2201/70715

摘要： A novel and useful acquisition and synchronization mechanism for spread spectrum communication systems whereby a synchronization sequence comprising a plurality of known symbols spaced apart by predefined time delay intervals is transmitted as the start of packet signal. At the transmitter, a synchronization sequence is transmitted at the beginning of each packet. A synchronization sequence is generated which includes a plurality of symbols with predefined time gaps between each of the symbols. Multiple synchronization sequences may be generated wherein each sequence comprises a unique set of time delays or gaps between each of the symbols. Each set of unique time delays or gaps between symbols of a sequence is stored as a synchronization sequence gap template in memory. When required to generate a synchronization sequence, the sequence generator outputs the plurality of synchronization symbols and inserts a specific time delay between each of the symbols in accordance with the contents of the gap template for the particular synchronization sequence.

摘要翻译： 一种用于扩频通信系统的新型有用的采集和同​​步机制，由此发送包括以预定义的时间延迟间隔间隔开的多个已知符号的同步序列作为分组信号的开始。 在发射机处，在每个分组的开始处发送同步序列。 产生包括在每个符号之间具有预定时间间隙的多个符号的同步序列。 可以生成多个同步序列，其中每个序列包括唯一的一组时间延迟或每个符号之间的间隙。 每一组唯一的时间延迟或序列的符号之间的间隙作为同步序列间隙模板存储在存储器中。 当需要产生同步序列时，序列生成器输出多个同步符号，并根据特定同步序列的间隙模板的内容在每个符号之间插入特定的时间延迟。

公开(公告)号：US06727790B2

公开(公告)日：2004-04-27

申请号：US09933065

申请日：2001-08-20

申请人： Dan Raphaeli ,  Oren Kaufman ,  Evgeny Bassin ,  Boris Zarud

发明人： Dan Raphaeli ,  Oren Kaufman ,  Evgeny Bassin ,  Boris Zarud

IPC分类号： H04L700

CPC分类号： H04B1/7075 ,  H04B1/70755 ,  H04B1/7095 ,  H04B2201/70715

摘要： A novel and useful acquisition and synchronization mechanism for spread spectrum communication systems whereby a synchronization sequence comprising a plurality of known symbols spaced apart by predefined time delay intervals is transmitted as the start of packet signal. At the receiver, the received signal is correlated against the synchronization sequence using the predefined gaps or time delay intervals inserted between the symbols. The received signal is linearly correlated to generate a correlation peak for each symbol received. The expected position of each correlation peak is calculated and compared to the positions of the correlation peaks received. If the number of matches exceeds a threshold, synchronization is declared.

摘要翻译： 一种用于扩频通信系统的新型有用的采集和同​​步机制，由此发送包括以预定义的时间延迟间隔间隔开的多个已知符号的同步序列作为分组信号的开始。 在接收机处，使用插入在符号之间的预定义间隙或时间延迟间隔将接收信号与同步序列相关。 所接收的信号是线性相关的，以产生接收的每个符号的相关峰值。 计算每个相关峰的预期位置并将其与接收到的相关峰的位置进行比较。 如果匹配次数超过阈值，则声明同步。

公开(公告)号：US06665352B2

公开(公告)日：2003-12-16

申请号：US10035133

申请日：2002-01-04

申请人： Gregory Lerner ,  Dan Raphaeli ,  Oren Kaufman ,  Boris Zarud

发明人： Gregory Lerner ,  Dan Raphaeli ,  Oren Kaufman ,  Boris Zarud

IPC分类号： H04L2549

CPC分类号： H04L25/03834

摘要： A novel and useful windowing mechanism for reducing the out of band harmonics of an output transmit signal. The windowing mechanism functions to smooth the transition between two consecutive transmit waveforms. The mechanism of present invention is particularly useful in communication systems characterized by consecutively transmitted symbols whereby the concatenation of transmitted waveforms causes discontinuities between symbols. The windowing mechanism is operative to reduce the effect of these discontinuities to reduce out of band harmonics of the transmitted output signal. The windowing mechanism extends each transmit waveform both earlier and later in time thus creating extending waveform portions on either end of the transmit waveform. The extended portions are then multiplied by a suitable windowing function and the result is summed with the next transmit waveform.

摘要翻译： 一种用于减少输出发射信号的带外谐波的新型和有用的窗口机制。 开窗机制用于平滑两个连续发射波形之间的转换。 本发明的机理在以连续发送的符号为特征的通信系统中特别有用，由此传输的波形的级联导致符号之间的不连续性。 开窗机制可用于减少这些不连续性的影响，以减少发射的输出信号的带外谐波。 窗口化机制在时间上更早地延迟每个发射波形，从而在发射波形的任一端产生扩展的波形部分。 然后将扩展部分乘以合适的加窗函数，并将结果与​​下一个发送波形相加。

公开(公告)号：US07020784B2

公开(公告)日：2006-03-28

申请号：US09933060

申请日：2001-08-20

申请人： Dan Raphaeli ,  Evgeny Bassin ,  Mordechai Mushkin ,  Oren Kaufman ,  Tanya Rosing

发明人： Dan Raphaeli ,  Evgeny Bassin ,  Mordechai Mushkin ,  Oren Kaufman ,  Tanya Rosing

IPC分类号： H04L9/00

CPC分类号： H04L63/1416

摘要： A novel and useful mechanism for detecting intrusion and jamming attempts by an imposter node. A time window defined as an emergency window is reserved after the end of a packet and before an acknowledgement window. Nodes that detect the presence of an intruder transmit an emergency packet during the emergency time window to inform the receive node that the packet it received was sent from an imposter node. Attempts to jam the transmission of the emergency packet from the victim node to the receive node are detected by listening during the emergency window time period for carrier signal that indicates that an emergency packet is trying to be sent. An emergency packet request message is sent by the receive node in response which causes the victim node to resend the emergency packet.

摘要翻译： 一种新颖有用的机制，用于检测冒号节点的入侵和干扰尝试。 定义为紧急窗口的时间窗口在分组结束之后和确认窗口之前被保留。 检测入侵者的存在的节点在紧急时间窗口期间发送紧急分组，以通知接收节点其接收到的分组是从冒号节点发送的。 在紧急窗口期间，通过在紧急窗口时段期间通过监听来指示紧急分组正在试图发送，来检测紧急分组从受害节点到接收节点的传输的尝试。 响应中由接收节点发送紧急分组请求消息，导致受害者节点重新发送紧急分组。

公开(公告)号：US06826235B2

公开(公告)日：2004-11-30

申请号：US10035119

申请日：2002-01-04

申请人： Gregory Lerner ,  Dan Raphaeli ,  Oren Kaufman ,  Boris Zarud

发明人： Gregory Lerner ,  Dan Raphaeli ,  Oren Kaufman ,  Boris Zarud

IPC分类号： H04L2302

CPC分类号： H04B1/70775 ,  H04B3/54 ,  H04B2203/5408 ,  H04B2203/5416 ,  H04B2203/5425 ,  H04B2203/5441 ,  H04B2203/5483 ,  H04L1/0045 ,  H04L1/08

摘要： A novel robust communications scheme whereby a repetition code at the transmitter and an associated cumulative decoder at the receiver are used to increase the reliability of transmission in a communications system. The robust communications scheme of the present invention is effective to increase the reliability of transmission by repetitively transmitting each data segment a number of times in accordance with a repetition code and subsequently collecting the received energy at the receiver over an accordingly longer period of time. Accumulating the received energy over a longer period of time at the receiver, yields a marked improvement in the signal to noise ratio (SNR) of the receiver.

摘要翻译： 一种新颖的鲁棒通信方案，其中在发射机处的重复码和接收机处的相关联的累积解码器被用于增加通信系统中的传输的可靠性。 本发明的鲁棒通信方案通过根据重复码重复地发送每个数据段多次并且随后在相应更长的时间段内收集接收的能量，从而有效地提高了传输的可靠性。 在接收机上在更长的时间内累积接收到的能量，导致接收机的信噪比（SNR）的显着改善。