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    FINE SYMBOL TIMING ESTIMATION
    2.
    发明申请
    FINE SYMBOL TIMING ESTIMATION 有权
    精细符号时序估计

    公开(公告)号：US20120140858A1

    公开(公告)日：2012-06-07

    申请号：US12961271

    申请日：2010-12-06

    申请人： June Chul ROH ,  Srinath HOSUR ,  Timothy M. SCHMIDL

    发明人： June Chul ROH ,  Srinath HOSUR ,  Timothy M. SCHMIDL

    IPC分类号： H04L27/06

    CPC分类号： H04L27/205 ,  H04L27/2335

    摘要： Systems and methods for fine symbol timing estimation are disclosed herein. In one embodiment, a wireless receiver includes a differential detector, a correlator, a coarse symbol timing estimator, and a fine symbol timing estimator. The differential detector is configured to detect phase differences in a received preamble signal modulated using differential phase shift keying. The correlator is configured to correlate symbol values output by the differential detector against a reference sequence. The coarse symbol timing estimator is configured to generate a coarse symbol timing estimate, and to generate a coarse timing sample symbol index value corresponding to the coarse symbol timing estimate. The fine symbol timing estimator is configured to generate a fine symbol timing estimate that is more accurate than the coarse symbol timing estimate based on the coarse timing sample symbol index value and correlation samples at index values preceding and succeeding the coarse timing sample index value.

    摘要翻译： 本文公开了用于精细符号定时估计的系统和方法。 在一个实施例中，无线接收机包括差分检测器，相关器，粗略符号定时估计器和精细符号定时估计器。 差分检测器被配置为检测使用差分相移键控调制的接收前导信号中的相位差。 相关器被配置为将由差分检测器输出的符号值与参考序列相关联。 粗略符号定时估计器被配置为产生粗略符号定时估计，并且生成与粗略符号定时估计对应的粗定时采样符号索引值。 精细符号定时估计器被配置为基于粗略定时样本符号索引值和在粗略定时样本索引值之前和之后的索引值处的相关样本，生成比粗略符号定时估计更精确的精细符号定时估计。

    High speed differential encoder and interleaver
    3.
    发明授权
    High speed differential encoder and interleaver 有权
    高速差分编码器和交织器

    公开(公告)号：US07929640B2

    公开(公告)日：2011-04-19

    申请号：US11559975

    申请日：2006-11-15

    申请人： Andrew Donovan Smith ,  Gerald R. Fischer

    发明人： Andrew Donovan Smith ,  Gerald R. Fischer

    IPC分类号： H04L27/20

    CPC分类号： H04L27/2035 ,  H04L27/205

    摘要： A plurality of differential encoders encodes a plurality of parallel data bit streams. XOR gates interleave the outputs of the differential encoders forming a single high speed differentially encoded bit stream with a data rate that is the sum of the data rate of the parallel data bit streams. The high speed data stream provides a single differentially encoded input to a differential phase shift keying modulator that generates symbols for a high speed optical communication system.

    摘要翻译： 多个差分编码器对多个并行数据比特流进行编码。 XOR门将形成单个高速差分编码比特流的差分编码器的输出与作为并行数据比特流的数据速率之和的数据速率进行交织。 高速数据流向差分相移键控调制器提供单个差分编码的输入，该调制器产生用于高速光通信系统的符号。

    WIDEBAND PHASE MODULATOR
    4.
    发明申请
    WIDEBAND PHASE MODULATOR 有权
    宽带相位调制器

    公开(公告)号：US20100231315A1

    公开(公告)日：2010-09-16

    申请号：US12402441

    申请日：2009-03-11

    申请人： Bo Sun

    发明人： Bo Sun

    IPC分类号： H03C3/02

    CPC分类号： H04L27/2032 ,  H03C3/00 ,  H03L7/0812 ,  H04L27/205 ,  H04L27/361

    摘要： An apparatus for phase modulation includes a delay locked loop configured to generate from a reference signal a plurality of phase shifted signals, each of the phase shifted signals being locked to the reference signal and having a different phase shift from the other phase shifted signals with respect to the reference signal, and a multiplexer configured to select one of the phase shifted signals.

    摘要翻译： 一种用于相位调制的装置包括：延迟锁定环路，被配置为从参考信号产生多个相移信号，每个相移信号被锁定到参考信号，并且与其它相移信号具有不同的相移 以及被配置为选择所述相移信号之一的多路复用器。

    Systems and methods for high-efficiency transmission of information through narrowband channels
    5.
    发明授权
    Systems and methods for high-efficiency transmission of information through narrowband channels 失效
    通过窄带通道高效率传输信息的系统和方法

    公开(公告)号：US07471743B2

    公开(公告)日：2008-12-30

    申请号：US11418887

    申请日：2006-05-06

    申请人： Alvin Dale Kluesing ,  Sai C. Manapragada

    发明人： Alvin Dale Kluesing ,  Sai C. Manapragada

    IPC分类号： H04L27/00 ,  H04L27/06 ,  H04L7/00

    CPC分类号： H04L27/205

    摘要： Systems and method for receiving information through narrowband communication channels are provided. The systems and method involve a satellite-based system for receiving a signal, including a receiver filter. The receiver filter is designed based on fractal modeling of the frequency spectrum of the received signal. The systems and method of the present invention enable data rates exceeding 5 Mbps to be received through frequency channels as narrow as 50 KHz under a variety of channel conditions.

    摘要翻译： 提供了通过窄带通信信道接收信息的系统和方法。 该系统和方法涉及用于接收包括接收机滤波器的信号的基于卫星的系统。 接收机滤波器是基于接收信号频谱的分形建模而设计的。 本发明的系统和方法使得在各种信道条件下，可以通过频率信道接收到超过5Mbps的数据速率，窄度为50KHz。

    OFDM RECEIVER APPARATUS
    6.
    发明申请
    OFDM RECEIVER APPARATUS 有权
    OFDM接收机设备

    公开(公告)号：US20080152042A1

    公开(公告)日：2008-06-26

    申请号：US11958579

    申请日：2007-12-18

    申请人： Naoto Adachi

    发明人： Naoto Adachi

    IPC分类号： H04L27/22 ,  H04L27/28

    CPC分类号： H04L27/2602 ,  H04L27/205 ,  H04L27/2647

    摘要： An OFDM receiver apparatus receives an OFDM signal including a plurality of DBPSK signals transmitting identical information. An extraction unit extracts the plurality of DBPSK signals from the OFDM signal. A phase difference calculation unit calculates a phase difference between symbols of each of the plurality of extracted DBPSK signals. An accumulation unit accumulates the plurality of phase differences. A decision unit decides data transmitted by the DBPSK signals on the basis of an accumulation result.

    摘要翻译： OFDM接收装置接收包含发送相同信息的多个DBPSK信号的OFDM信号。 提取单元从OFDM信号中提取多个DBPSK信号。 相位差计算单元计算多个提取的DBPSK信号中的每一个的符号之间的相位差。 累积单元累积多个相位差。 决定单元基于积累结果来决定由DBPSK信号发送的数据。

    Method and apparatus for transferring and receiving ultra wideband signals using differential phase shift keying scheme
    8.
    发明申请
    Method and apparatus for transferring and receiving ultra wideband signals using differential phase shift keying scheme 审中-公开
    使用差分相移键控方案传输和接收超宽带信号的方法和装置

    公开(公告)号：US20040223556A1

    公开(公告)日：2004-11-11

    申请号：US10839139

    申请日：2004-05-06

    申请人： SAMSUNG ELECTRONICS CO., LTD.

    发明人： Yun-hwa Choi

    IPC分类号： H04B001/06

    CPC分类号： H04L27/0004 ,  H04L27/205 ,  H04L27/2331

    摘要： An apparatus and method for transmitting and/or receiving ultra wideband (UWB) signals using differential phase shift keying (DPSK). A UWB transmitter includes a DPSK conversion unit for converting a first bitstream (data stream) by DPSK into a second bitstream, a modulation unit for generating UWB wavelet series based on the second bitstream, allowing the phase difference to be 180 degrees between the bit of 0 and the bit of 1, and an RF module for transmitting the generated UWB wavelet series through a wireless channel. A UWB receiver includes an RF module for receiving UWB wavelet series transmitted through a wireless channel, a time delay unit for delaying the UWB wavelet series received though the RF module for time period corresponding to an inter-pulse space, and a demodulation unit for demodulating data stream based on a correlation of the UWB wavelet series received through the RF module and the delayed UWB wavelet series passing through the time delay unit.

    摘要翻译： 一种使用差分相移键控（DPSK）发送和/或接收超宽带（UWB）信号的装置和方法。 UWB发射机包括用于将第一比特流（数据流）通过DPSK转换为第二比特流的DPSK转换单元，用于基于第二比特流生成UWB小波序列的调制单元，允许相位差为180度 0和1的位，以及用于通过无线信道发送生成的UWB小波序列的RF模块。 UWB接收机包括用于接收通过无线信道传输的UWB小波序列的RF模块，用于延迟通过RF模块接收的UWB小波序列的时间延迟单元，用于对应于脉冲间空间的时间段;以及解调单元，用于解调 基于通过RF模块接收的UWB小波序列与通过时间延迟单元的延迟UWB小波序列的相关性的数据流。

    Method for modulation
    9.
    发明申请
    Method for modulation 审中-公开
    调制方法

    公开(公告)号：US20040170120A1

    公开(公告)日：2004-09-02

    申请号：US10755871

    申请日：2004-01-12

    发明人： Jukka Reunamaki ,  Arto Palin ,  Heikki Berg ,  Mauri Honkanen

    IPC分类号： H04L005/04 ,  H04J009/00

    CPC分类号： H04L27/205 ,  H04L27/2017

    摘要： The present invention relates to a method for modulating a signal in a system providing short-range wireless communication. In the signal, the signal is transmitted in packet format, in which each packet comprises at least a first part and a second part. In the method, the first part and the second part are modulated by using the first modulation method and the second modulation method, respectively. The second modulation method is initialized by using the first part. The invention also relates to a transceiver device and a wireless communication system, in which the method is applied.

    摘要翻译： 本发明涉及一种在提供短距离无线通信的系统中调制信号的方法。 在该信号中，信号以分组格式发送，其中每个分组包括至少第一部分和第二部分。 在该方法中，分别使用第一调制方法和第二调制方法来调制第一部分和第二部分。 通过使用第一部分来初始化第二调制方法。 本发明还涉及一种应用该方法的收发机设备和无线通信系统。