公开(公告)号：US20080268779A1

公开(公告)日：2008-10-30

申请号：US12080257

申请日：2008-03-31

申请人： Sandeep Rajpal ,  Siddharth Shetty ,  Gaetano Roberto Aiello ,  Timothy Leo Gallagher ,  Nishant Kumar ,  Nicholas Michael Carbone ,  James Laurence Taylor

发明人： Sandeep Rajpal ,  Siddharth Shetty ,  Gaetano Roberto Aiello ,  Timothy Leo Gallagher ,  Nishant Kumar ,  Nicholas Michael Carbone ,  James Laurence Taylor

IPC分类号： H04B7/00 ,  H04Q7/00

CPC分类号： H04W8/005 ,  H04W72/04 ,  H04W84/18 ,  H04W88/10

摘要： A victim wireless device is detected by obtaining a set of wireless bands and a set of time periods. During a given time period a subset of wireless bands corresponding to that time period is vacant and a remaining subset of wireless bands is used to exchange data. During each of the time periods in the set of time periods: a signal, if any, is received; in the event a signal is received, the subset of vacant wireless bands corresponding to that time period is recorded; and after the set of time periods ends, it is determined whether there is a victim wireless device based at least in part on the number of vacant wireless bands recorded.

摘要翻译： 通过获得一组无线频带和一组时间段来检测受害者无线设备。 在给定的时间段期间，对应于该时间段的无线频带的子集是空的，并且使用无线频带的剩余子集来交换数据。 在一组时间段中的每个时间段期间：接收到一个信号（如果有的话）; 在接收到信号的情况下，记录与该时间段对应的空闲无线频带的子集; 并且在所述一组时间段结束之后，确定至少部分地基于所记录的空闲无线频带的数量是否存在受害者无线设备。

公开(公告)号：US6067326A

公开(公告)日：2000-05-23

申请号：US925552

申请日：1997-09-08

申请人： Olafur O. Jonsson ,  Sverrir Olafsson ,  Sandeep Rajpal ,  Ramin A. Nobakht

发明人： Olafur O. Jonsson ,  Sverrir Olafsson ,  Sandeep Rajpal ,  Ramin A. Nobakht

IPC分类号： H04L1/00 ,  H04L25/49 ,  H04L25/34

CPC分类号： H04L1/0058 ,  H04L25/4917

摘要： A method is disclosed for encoding and modulating bits of an information stream and transmitting them over a designated channel in a high speed communication system. The method includes the steps of dividing a set of the entire constellation of available points into a finite plurality of zero parity vectors defined by two criteria, namely that (1) the column vectors have odd parity and (2) a group of a predefined integer number of column vectors have a 0 modulus (i.e. be divisible by a given number). Column vectors forming only a partially dimensioned portion of the code (e.g. 4D) corresponding to one discrete baud interval are preferably transmitted in a systematic form and with sufficient coding gain for adaptive DFE equalization and whereby a group of column vectors corresponding to an integer number of successive baud intervals that form the fully dimensioned code (e.g. 16D) are transmitted with correlation to one another to achieve an even greater amount of coding gain suitable for high reliability data transmission with error correction and subsequent detection that yield a low bit error rate.

摘要翻译： 公开了一种用于对信息流的比特进行编码和调制并通过高速通信系统中的指定频道进行发送的方法。 该方法包括以下步骤：将可用点的整个星座的集合划分为由两个标准定义的有限多个零奇偶校验向量，即（1）列向量具有奇校验，以及（2）预定义整数组 列向量的数量具有0个模数（即可以被给定的数字整除）。 对应于一个离散波特率间隔的仅形成代码（例如，4D）的部分尺寸部分的列向量优选地以系统形式并且具有用于自适应DFE均衡的足够的编码增益被发送，并且由此对应于整数个 形成完整尺寸码（例如16D）的连续波特间隔彼此相关地发送，以获得适合于具有纠错的高可靠性数据传输的更大量的编码增益和产生低位错误率的后续检测。

公开(公告)号：US06272184B1

公开(公告)日：2001-08-07

申请号：US08992034

申请日：1997-12-17

申请人： Jonathan H. Ta ,  Samuel T. Wong ,  Stanley C. Hsieh ,  Sandeep Rajpal

发明人： Jonathan H. Ta ,  Samuel T. Wong ,  Stanley C. Hsieh ,  Sandeep Rajpal

IPC分类号： H03D300

CPC分类号： H04L27/156

摘要： A non-coherent frequency shift keying detection scheme. The invention has been applied to the special case of capturing caller ID information when the voice-band modem is in the low power mode. The technique provides the capability for capturing and decoding enough of the caller ID information transmitted by the telephone company while the computer is in the sleep or low power mode, and upon awakening the computer can use this captured information to decode the actual caller ID information. Additionally, this invention automatically accommodates both the Bell 202 or V.23 transmission standards by utilizing a threshold concept in which the time that has elapsed between the zero crossings of an FSK tone half cycle are measured. The elapsed times may be used as an indication of which FSK tone has been transmitted thus allowing capture of caller ID information. The bit output of the caller ID capture circuit is output for storage by RAM thus allowing use by the computer when it wakes up.

摘要翻译： 非相干频移键控检测方案。 本发明已经应用于当语音频带调制解调器处于低功率模式时捕获主叫用户ID信息的特殊情况。 该技术提供了在计算机处于睡眠或低功率模式时由电话公司发送的足够的主叫ID信息进行捕获和解码的能力，并且在唤醒计算机可以使用该捕获的信息来解码实际的呼叫者ID信息。 此外，本发明通过利用其中测量在FSK音调半周期的过零点之间已经经过的时间的阈值概念，自动适应Bell 202或V.23传输标准。 经过的时间可以被用作指示哪个FSK音已经被发送，从而允许捕获呼叫者ID信息。 主叫ID捕获电路的位输出被输出以供RAM存储，从而允许计算机在唤醒时使用。

公开(公告)号：US5910959A

公开(公告)日：1999-06-08

申请号：US779084

申请日：1997-01-06

申请人： Sverrir Olafsson ,  Sandeep Rajpal

发明人： Sverrir Olafsson ,  Sandeep Rajpal

IPC分类号： H04L25/03 ,  H04M11/06 ,  H03M13/00

CPC分类号： H04M11/06 ,  H04L1/0025 ,  H04L2025/03815

摘要： A methodology for a modem control channel is disclosed. The channel allows faster seamless rate change and precoder tap exchange than the baseline procedure for seamless rate change, allowing for more robust transmission of control information. It can also be use to convey side-information in the case of multiple data applications, serving the purpose of mode switching. Thus, with a single control channel both the needs for seamless rate change and transmitting control information for multiple data applications can be met.

摘要翻译： 公开了一种用于调制解调器控制信道的方法。 该通道允许比无缝速率变化的基线程序更快的无缝速率变化和预编码器分接开关，从而允许控制信息的更强大的传输。 在多种数据应用的情况下，也可以用于传送侧信息，用于模式切换。 因此，通过单个控制信道，可以满足对于多个数据应用的无缝速率变化和发送控制信息的需求。