公开(公告)号：US6125125A

公开(公告)日：2000-09-26

申请号：US950429

申请日：1997-10-15

Applicant: Madihally J. Narasimha ,  Kishan Shenoi

Inventor： Madihally J. Narasimha ,  Kishan Shenoi

IPC: H04B7/26 ,  H04J3/06

CPC classification number: H04B7/2693 ,  H04J3/0682

Abstract: New methods for synchronizing previously unsynchronized BTS's of time division multiple access cellular networks are disclosed. Timing information that is readily available throughout the network is used to determine for each BTS when information representing a particular event is transmitted relative to the timing information. The time differences that are detected are used for steering the clock of each BTS to have the next or some other subsequent event transmitted at the same time.

Abstract translation: 公开了用于同步先前未同步的BTS的时分多址蜂窝网络的新方法。 在整个网络中容易获得的定时信息用于为每个BTS确定相对于定时信息发送表示特定事件的信息。 检测到的时间差用于指导每个BTS的时钟，以使下一个或其他后续事件同时发送。

公开(公告)号：US08055199B2

公开(公告)日：2011-11-08

申请号：US12417595

申请日：2009-04-02

Applicant: Youngjae Kim ,  Je Woo Kim ,  Jong Hyeon Park ,  Madihally J. Narasimha

Inventor： Youngjae Kim ,  Je Woo Kim ,  Jong Hyeon Park ,  Madihally J. Narasimha

IPC: H04B1/00

CPC classification number: H04B7/024

Abstract: Certain embodiments of the present disclosure relate to methods for mitigating interference of signals transmitted to a mobile station (MS) from a plurality of neighboring base stations. By applying a proposed spatio-frequency modulation (SFM) technique at a serving base station (BS) and at each interfering BS, a co-channel interference (CCI) from interfering base stations can be efficiently mitigated at the MS and signal transmitted from the serving BS can be more accurately decoded.

Abstract translation: 本公开的某些实施例涉及用于减轻从多个相邻基站发送到移动站（MS）的信号的干扰的方法。 通过在服务基站（BS）和每个干扰BS处应用提出的空间 - 频率调制（SFM）技术，可以在MS处有效地减轻来自干扰基站的同信道干扰（CCI），并从 服务BS可以更准确地解码。

公开(公告)号：US4237551A

公开(公告)日：1980-12-02

申请号：US972458

申请日：1978-12-22

Applicant: Madihally J. Narasimha

Inventor： Madihally J. Narasimha

IPC: H04J4/00

CPC classification number: H04J4/005

Abstract: A transmultiplexer and method for use in a telephone system for translating information between time division and frequency division multiplexed formats. The transmultiplexer includes discrete cosine transform processor means connected to receive a linearly coded time division multiplexed signal representing a plurality of information channels for transforming the time division signal into a frequency division multiplexed signal and also includes weighting network means for weighting the transformed signal with predetermined real coefficients thereby forming a frequency division multiplexed signal corresponding to said time division multiplexed signal. The weighting network means are connected to receive a second multi-channel frequency division multiplexed signal for weighting the frequency signal with predetermined real coefficients thereby forming a weighted signal. An inverse discrete cosine transform processor transforms the weighted signal into a multi-channel time division multiplexed signal corresponding to the frequency division multiplexed signal.

Abstract translation: 一种用于电话系统中的用于在时分和频分复用格式之间转换信息的多路复用器和方法。 所述多路复用器包括离散余弦变换处理器装置，连接用于接收表示用于将所述时分信号变换为频分多路复用信号的多个信道的线性编码时分复用信号，并且还包括加权网络装置，用于以预定的实数 从而形成对应于所述时分复用信号的频分多路复用信号。 加权网络装置被连接以接收第二多信道频分多路复用信号，用于以预定的实数加权频率信号，从而形成加权信号。 逆离散余弦变换处理器将加权信号转换为对应于频分复用信号的多通道时分复用信号。

公开(公告)号：US08576965B2

公开(公告)日：2013-11-05

申请号：US12831462

申请日：2010-07-07

Applicant: Madihally J. Narasimha ,  Je Woo Kim ,  Nitin Kasturi ,  Parvathanathan Subrahmanya

Inventor： Madihally J. Narasimha ,  Je Woo Kim ,  Nitin Kasturi ,  Parvathanathan Subrahmanya

IPC: H04B1/10

CPC classification number: H04B1/525 ,  G01S19/21 ,  H04B1/3805 ,  H04B1/406

Abstract: Certain embodiments of the present disclosure support techniques for interference cancellation in a multi-mode wireless modem that supports coexistence of different radio technologies.

Abstract translation: 本公开的某些实施例支持支持不同无线电技术共存的多模式无线调制解调器中的干扰消除技术。

公开(公告)号：US20110103431A1

公开(公告)日：2011-05-05

申请号：US12831462

申请日：2010-07-07

Applicant: Madihally J. Narasimha ,  Je Woo Kim ,  Nitin Kasturi ,  Parvathanathan Subrahmanya

Inventor： Madihally J. Narasimha ,  Je Woo Kim ,  Nitin Kasturi ,  Parvathanathan Subrahmanya

IPC: H04B1/10 ,  H04B1/707

CPC classification number: H04B1/525 ,  G01S19/21 ,  H04B1/3805 ,  H04B1/406

Abstract: Certain embodiments of the present disclosure support techniques for interference cancellation in a multi-mode wireless modem that supports coexistence of different radio technologies.

Abstract translation: 本公开的某些实施例支持支持不同无线电技术共存的多模式无线调制解调器中的干扰消除技术。

公开(公告)号：US20100220819A1

公开(公告)日：2010-09-02

申请号：US12395675

申请日：2009-03-01

Applicant: Junqiang Li ,  Madihally J. Narasimha ,  Je Woo Kim

Inventor： Junqiang Li ,  Madihally J. Narasimha ,  Je Woo Kim

IPC: H04L27/06

CPC classification number: H04L27/2675 ,  H04L27/266

Abstract: Certain embodiments of the present disclosure relate to a method for tracking of a carrier frequency offset. A soft combined frequency tracking discriminator is proposed as a part of the closed loop structure that can provide fast tracking of the frequency offset in an initial pull-in mode, and can also track small residual frequency variance in a fine-tracking mode.

Abstract translation: 本公开的某些实施例涉及用于跟踪载波频率偏移的方法。 提出了一种软组合频率跟踪鉴别器作为闭环结构的一部分，其可以提供初始引入模式中的频率偏移的快速跟踪，并且还可以在精细跟踪模式中跟踪小的残余频率方差。

公开(公告)号：US4131766A

公开(公告)日：1978-12-26

申请号：US814303

申请日：1977-07-11

Applicant: Madihally J. Narasimha

Inventor： Madihally J. Narasimha

IPC: H04J1/08 ,  H04J4/00 ,  H04J1/00

CPC classification number: H04J1/08 ,  H04J4/005

Abstract: Disclosed is a digital filter for modulating and demodulating in frequency division multiplexing systems. For modulating a number of voice channels, a Fourier transform processor computes the discrete Fourier transform of a first series of data samples representative of the number of voice channels in time division multiplex format. A weighting network weights the transformed samples with predetermined weighting coefficients to form a frequency division multiplexed signal with proper passband characteristics. For demodulating a frequency division multiplexed signal the weighting network weights the samples with predetermined weighting coefficients and the Fourier transform processor computes a discrete Fourier transform of the weighted samples to form a time division multiplexed signal representative of the number of voice channels.

Abstract translation: 公开了一种用于频分复用系统中的调制和解调的数字滤波器。 为了调制多个语音信道，傅里叶变换处理器计算表示时分复用格式的语音信道数量的第一系列数据样本的离散付里叶变换。 加权网络以预定的加权系数对变换的样本进行加权，以形成具有适当通带特性的频分复用信号。 为了对频分多路复用信号进行解调，加权网络以预定的加权系数加权样本，傅里叶变换处理器计算加权样本的离散傅立叶变换，以形成代表语音信道数的时分复用信号。

公开(公告)号：US20130177065A1

公开(公告)日：2013-07-11

申请号：US13458514

申请日：2012-04-27

Applicant: Madihally J. Narasimha ,  Dineshkumar Karuppanna Gounder Ramasamy ,  Je Woo Kim

Inventor： Madihally J. Narasimha ,  Dineshkumar Karuppanna Gounder Ramasamy ,  Je Woo Kim

IPC: H04L27/01

CPC classification number: H04L25/03044 ,  H04L2025/03414

Abstract: The described aspects include a user equipment (UE) apparatus and corresponding method of equalizing samples of received signals in wireless communication. A plurality of samples of a signal received in wireless communication can be obtained, and on-time samples and late samples of the plurality of samples are independently equalized to respectively generate equalized on-time samples and equalized late samples. In addition, a preference factor can be applied to at least the equalized on-time samples to generate preferred equalized on-time samples, which are combined with the equalized late samples to generate a set of equalized samples for decoding.

Abstract translation: 所描述的方面包括用户设备（UE）装置和在无线通信中均衡接收信号的采样的相应方法。 可以获得在无线通信中接收的信号的多个样本，并且多个样本的接通时间采样和后期采样被独立地相等，以分别产生均衡的接通时间采样和均衡的深采样。 此外，优选因子可以应用于至少均衡的接通时间样本以产生优选的均衡接通时间样本，其与均衡的深度样本组合以生成用于解码的一组均衡样本。

公开(公告)号：US08270545B2

公开(公告)日：2012-09-18

申请号：US12395675

申请日：2009-03-01

Applicant: Junqiang Li ,  Madihally J. Narasimha ,  Je Woo Kim

Inventor： Junqiang Li ,  Madihally J. Narasimha ,  Je Woo Kim

IPC: H04L27/06

CPC classification number: H04L27/2675 ,  H04L27/266

Abstract: Certain embodiments of the present disclosure relate to a method for tracking of a carrier frequency offset. A soft combined frequency tracking discriminator is proposed as a part of the closed loop structure that can provide fast tracking of the frequency offset in an initial pull-in mode, and can also track small residual frequency variance in a fine-tracking mode.

Abstract translation: 本公开的某些实施例涉及用于跟踪载波频率偏移的方法。 提出了一种软组合频率跟踪鉴别器作为闭环结构的一部分，其可以提供初始引入模式中的频率偏移的快速跟踪，并且还可以在精细跟踪模式中跟踪小的残余频率方差。

公开(公告)号：US08259864B2

公开(公告)日：2012-09-04

申请号：US12367499

申请日：2009-02-06

Applicant: Sungjun Hwang ,  Madihally J. Narasimha ,  Je Woo Kim

Inventor： Sungjun Hwang ,  Madihally J. Narasimha ,  Je Woo Kim

IPC: H04L27/06

CPC classification number: H04L25/0202 ,  H04L27/2647

Abstract: Certain embodiments of the present disclosure relate to a Fourier-Quadratic (FQ) method for channel estimation that may help improve error rate performance of existing techniques, with only moderate increase in computational complexity. The proposed FQ scheme according to certain embodiments may provide a viable solution to the difficult channel estimation problem encountered in the Vehicular B channel with a long delay spread. Furthermore, a robustness of the proposed FQ channel estimation scheme to accommodate errors in a channel delay profile and to errors in a channel power profile is demonstrated through simulations.

Abstract translation: 本公开的某些实施例涉及用于信道估计的傅里叶二次（FQ）方法，其可以有助于改善现有技术的误码率性能，同时仅计算复杂度的适度增加。 根据某些实施例的所提出的FQ​​方案可以为具有长延迟扩展的车载B信道中遇到的困难信道估计问题提供可行的解决方案。 此外，通过模拟证明了所提出的FQ​​信道估计方案的鲁棒性，以适应信道延迟分布中的误差和信道功率分布中的误差。