公开(公告)号：US20050073947A1

公开(公告)日：2005-04-07

申请号：US10677605

申请日：2003-10-02

申请人： Sourav Dey ,  David Magee ,  Srinath Hosur

发明人： Sourav Dey ,  David Magee ,  Srinath Hosur

IPC分类号： H04L12/28 ,  H04L25/02 ,  H04L27/26 ,  H04J1/16

CPC分类号： H04L25/0218 ,  H04L27/2647 ,  H04W84/12

摘要： For use with an orthogonal frequency division multiplexing (OFDM) receiver, the present invention discloses a channel estimator that employs a training sequence received through a channel. In one embodiment, the channel estimator includes a response assesser and a reducer. The response assesser computes a channel impulse response of the channel in a time-domain based on the training sequence. The reducer, coupled to the response assesser, sets designated taps associated with the channel impulse response to substantially zero.

摘要翻译： 为了与正交频分复用（OFDM）接收机一起使用，本发明公开了一种采用通过信道接收的训练序列的信道估计器。 在一个实施例中，信道估计器包括响应评估器和减速器。 响应评估器基于训练序列计算信道在时域中的信道脉冲响应。 耦合到响应评估器的减速器将与信道脉冲响应相关联的指定抽头设置为基本为零。

公开(公告)号：US08254498B1

公开(公告)日：2012-08-28

申请号：US13406888

申请日：2012-02-28

申请人： Theodore J. Myers ,  Sourav Dey

发明人： Theodore J. Myers ,  Sourav Dey

IPC分类号： H04L27/22 ,  H04L27/06 ,  H04J11/00

CPC分类号： H04L5/0033 ,  H04B1/713 ,  H04L5/0007 ,  H04L27/265

摘要： Methods, systems, and apparatuses, including computer programs encoded on computer-readable media, for receiving a first modulated signal on a first sub-channel, wherein a first transmitter randomly selects the first sub-channel from a plurality of sub-channels and for receiving, at the receiver, a second modulated signal on a second sub-channel, wherein the second sub-channel is orthogonal to the first sub-channel, wherein a second transmitter randomly selects the second sub-channel from the plurality of sub-channels. At least a portion of the first signal overlaps with a portion of the second signal. For each of the plurality of sub-channels, a plurality of symbols are stored in a buffer and a plurality of potential data frames are determined based upon the symbols in the buffer. A signal detection algorithm is applied to the potential data frames to detect the first modulated signal and the second modulated signal.

摘要翻译： 方法，系统和装置，包括在计算机可读介质上编码的计算机程序，用于在第一子信道上接收第一调制信号，其中第一发射机从多个子信道中随机选择第一子信道， 在接收机处接收第二子信道上的第二调制信号，其中第二子信道与第一子信道正交，其中第二发射机从多个子信道中随机选择第二子信道 。 第一信号的至少一部分与第二信号的一部分重叠。 对于多个子信道中的每一个，多个符号被存储在缓冲器中，并且基于缓冲器中的符号来确定多个潜在数据帧。 信号检测算法被应用于潜在数据帧以检测第一调制信号和第二调制信号。

公开(公告)号：US20050073946A1

公开(公告)日：2005-04-07

申请号：US10677566

申请日：2003-10-02

申请人： Sourav Dey ,  David Magee

发明人： Sourav Dey ,  David Magee

IPC分类号： H04J11/00 ,  H04L25/02 ,  H04L27/26

CPC分类号： H04L27/2613 ,  H04L25/0202 ,  H04L25/0226

摘要： The present invention discloses a transmitter and receiver for use with an orthogonal frequency division multiplexing (OFDM) communications system. In one embodiment, the OFDM communications system includes an OFDM transmitter that generates a training sequence that includes a fractional tone in a guard band thereof and transmits the training sequence via a channel. The OFDM communications system further includes an OFDM receiver that receives the training sequence and employs the fractional tone to obtain a channel response estimate.

摘要翻译： 本发明公开了一种与正交频分复用（OFDM）通信系统一起使用的发射机和接收机。 在一个实施例中，OFDM通信系统包括OFDM发射机，其生成包括其保护频带中的分数音调的训练序列，并且经由信道发送训练序列。 OFDM通信系统还包括OFDM接收机，其接收训练序列并使用分数音调来获得信道响应估计。