专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US06977972B1 Method of hybrid soft/hard decision demodulation of signals with multilevel modulation 失效
标题翻译：多电平调制信号混合软/硬判决解调方法
公开(公告)号：US06977972B1
公开(公告)日：2005-12-20
申请号：US09614784
申请日：2000-07-12
申请人： Srinivas Kandala , V. Srinivasa Somayazulu , Chan K. Park
发明人： Srinivas Kandala , V. Srinivasa Somayazulu , Chan K. Park
IPC分类号： H04L25/06 , H04L27/00 , H04L27/22
CPC分类号： H04L25/067
摘要： The performance of forward error correction decoders for digital communication systems can be improved if soft information relating the reliability of the value representing the demodulated signal is provided to the decoder with a value for the signal. On the other hand, soft information increases the quantity of information that must be processed, increasing the cost and complexity of the decoder.
摘要翻译：如果将与表示解调信号的值的可靠性相关联的软信息以信号的值提供给解码器，则可以提高数字通信系统的前向纠错解码器的性能。另一方面，软信息增加了必须处理的信息量，增加了解码器的成本和复杂性。

2. 发明授权

US06085104A Pilot aided, time-varying finite impulse response, adaptive channel matching receiving system and method 失效
标题翻译：导频辅助，时变有限脉冲响应，自适应信道匹配接收系统和方法
公开(公告)号：US06085104A
公开(公告)日：2000-07-04
申请号：US48240
申请日：1998-03-25
申请人： John M. Kowalski , Srinivas Kandala , V. Srinivasa Somayazulu
发明人： John M. Kowalski , Srinivas Kandala , V. Srinivasa Somayazulu
IPC分类号： H04B1/7115 , H04B1/712 , H04B7/08 , H04B15/00
CPC分类号： H04B1/7115 , H04B7/0845 , H04B7/0891 , H04B1/712
摘要： A wideband receiver, including a time-varying finite impulse response (FIR) filter, has been provided to combine multipath communications of data in response to pilot channel timing information. The time-varying FIR processes the multipath communications through independent signal paths. Each signal path includes a variable delay circuit and a variable gain circuit. The delay of each separate signal path is adjusted and made equal in response to the pilot channel timing information. Likewise, the gain of each signal path is adjusted in response to pilot channel gain information to maximize the signal to noise ratio of the combined signal paths. The separate signal paths are then summed in a combiner circuit. The time-varying FIR permits the data communication to be summed either before, or after demodulation. A method of combining multipath communications using a time-varying FIR is also provided.
摘要翻译：已经提供了包括时变有限脉冲响应（FIR）滤波器的宽带接收机，以响应于导频信道定时信息来组合数据的多路径通信。时变FIR通过独立的信号路径处理多路径通信。每个信号路径包括可变延迟电路和可变增益电路。每个单独的信号路径的延迟被调整并且响应于导频信道定时信息使其相等。类似地，响应于导频信道增益信息调整每个信号路径的增益，以最大化组合信号路径的信噪比。然后将单独的信号路径在组合器电路中相加。时变FIR允许在解调之前或之后将数据通信相加。还提供了使用时变FIR组合多路径通信的方法。

3. 发明申请

US20120057542A1 DOWNLINK RESOURCE ALLOCATION AND MAPPING 失效
标题翻译：下载资源分配和映射
公开(公告)号：US20120057542A1
公开(公告)日：2012-03-08
申请号：US13235290
申请日：2011-09-16
申请人： Qinghua Li , Xintian E. Lin , V. Srinivasa Somayazulu , Minnie Ho
发明人： Qinghua Li , Xintian E. Lin , V. Srinivasa Somayazulu , Minnie Ho
IPC分类号： H04W72/04
CPC分类号： H04L5/0007 , H04L5/0039 , H04L5/0041 , H04L5/0044 , H04L5/006 , H04L5/0064 , H04W72/12
摘要： Embodiments of the present invention provide for downlink resource allocation among a plurality of users. Other embodiments may be described and claimed.
摘要翻译：本发明的实施例提供了多个用户之间的下行链路资源分配。可以描述和要求保护其他实施例。

4. 发明授权

US08041362B2 Downlink resource allocation and mapping 有权
标题翻译：下行资源分配和映射
公开(公告)号：US08041362B2
公开(公告)日：2011-10-18
申请号：US11688188
申请日：2007-03-19
申请人： Qinghua Li , Xintian E. Lin , V. Srinivasa Somayazulu , Minnie Ho
发明人： Qinghua Li , Xintian E. Lin , V. Srinivasa Somayazulu , Minnie Ho
IPC分类号： H04Q7/20
CPC分类号： H04L5/0007 , H04L5/0039 , H04L5/0041 , H04L5/0044 , H04L5/006 , H04L5/0064 , H04W72/12
摘要： Embodiments of the present invention provide for downlink resource allocation among a plurality of users. Other embodiments may be described and claimed.
摘要翻译：本发明的实施例提供了多个用户之间的下行链路资源分配。可以描述和要求保护其他实施例。

5. 发明授权

US06208632B1 System and method for CDMA channel estimation 失效
标题翻译： CDMA信道估计的系统和方法
公开(公告)号：US06208632B1
公开(公告)日：2001-03-27
申请号：US09015424
申请日：1998-01-29
申请人： John M. Kowalski , Srinivas Kandala , V. Srinivasa Somayazulu
发明人： John M. Kowalski , Srinivas Kandala , V. Srinivasa Somayazulu
IPC分类号： H04B7216
CPC分类号： H04W52/42 , H04B1/707 , H04B1/7077 , H04B1/7117 , H04B7/0851 , H04B7/2631 , H04B2201/70701 , H04B2201/70702 , H04J3/0602
摘要： A wideband CDMA receiver system to accept messages from asynchronously transmitting base stations is provided. The base station transmission to each receiver includes a perch channel and at least one traffic channel. Although all the channels typically include pilot symbols for the purpose of demodulating the information symbols of the channel, the pilot channel includes a higher proportion of pilot symbols to information symbols. Therefore, a perch channel based timing and estimation system is inherently more accurate. In addition, the perch channel is generally transmitted at higher power levels than a traffic channel, and the resulting, higher, signal to noise ratio signal also improves the accuracy of the timing and channel estimation. Based on the timing derived from the perch channel of a first base station, the receiver can set the timing of the traffic channel transmissions from a second base station, to more closely match the timing of traffic channel transmissions from the first base station. In this manner, the signal to noise ratio of the demodulated traffic channel information symbols is enhanced through the diversity of using the transmissions of two base stations. A method for receiving wideband CDMA transmissions from asynchronously transmitting base stations is also provided.
摘要翻译：提供了一种用于接受来自异步发送基站的消息的宽带CDMA接收机系统。到每个接收机的基站传输包括导频信道和至少一个业务信道。虽然所有信道通常包括用于解调信道的信息符号的导频符号，但是导频信道包括较高比例的导频符号到信息符号。因此，基于导频信道的定时和估计系统本质上更准确。此外，导频信道通常以比业务信道更高的功率电平发送，并且所得到的更高的信噪比信号也提高了定时和信道估计的精度。基于从第一基站的导频信道导出的定时，接收机可以设置来自第二基站的业务信道传输的定时，以更紧密地匹配来自第一基站的业务信道传输的定时。以这种方式，通过使用两个基站的传输的分集来增强解调业务信道信息符号的信噪比。还提供了用于从异步发送基站接收宽带CDMA传输的方法。

6. 发明授权

US08781447B2 Techniques to wirelessly transmit data 有权
标题翻译：无线传输数据的技术
公开(公告)号：US08781447B2
公开(公告)日：2014-07-15
申请号：US12889625
申请日：2010-09-24
申请人： Barry A. O'Mahony , Jeffrey R. Foerster , V. Srinivasa Somayazulu , Ozgur Oyman
发明人： Barry A. O'Mahony , Jeffrey R. Foerster , V. Srinivasa Somayazulu , Ozgur Oyman
IPC分类号： H04L1/06 , H04B7/00 , G06F7/00
CPC分类号： H04N21/234327 , H04N21/631 , H04N21/6373
摘要： Techniques are described to transmit multimedia content to a mobile station using a combination of a mobile/cellular network as well as a TV Whitespace (TVWS) network. Scalable video coding can be used to transmit a baseline layer of multi-media content using the mobile/cellular network and one or more enhancement layers over the TVWS channels. Joint source-channel coding can be used to adjust the transmission scheme used by mobile/cellular and/or TVWS based on end user experience.
摘要翻译：描述了使用移动/蜂窝网络以及电视空白（TVWS）网络的组合将多媒体内容传送到移动台的技术。可以使用可分级视频编码来使用移动/蜂窝网络和TVWS信道上的一个或多个增强层来传输多媒体内容的基线层。联合源信道编码可以用于基于最终用户体验来调整移动/蜂窝和/或TVWS使用的传输方案。

7. 发明申请

US20120077466A1 TECHNIQUES TO WIRELESSLY TRANSMIT DATA 有权
标题翻译：技术无线传输数据
公开(公告)号：US20120077466A1
公开(公告)日：2012-03-29
申请号：US12889625
申请日：2010-09-24
申请人： Barry A. O'Mahony , Jeffrey R. Foerster , V. Srinivasa Somayazulu , Ozgur Oyman
发明人： Barry A. O'Mahony , Jeffrey R. Foerster , V. Srinivasa Somayazulu , Ozgur Oyman
IPC分类号： H04M3/42 , H04B1/38 , H04W4/00
CPC分类号： H04N21/234327 , H04N21/631 , H04N21/6373
摘要： Techniques are described to transmit multimedia content to a mobile station using a combination of a mobile/cellular network as well as a TV Whitespace (TVWS) network. Scalable video coding can be used to transmit a baseline layer of multi-media content using the mobile/cellular network and one or more enhancement layers over the TVWS channels. Joint source-channel coding can be used to adjust the transmission scheme used by mobile/cellular and/or TVWS based on end user experience.
摘要翻译：描述了使用移动/蜂窝网络以及电视空白（TVWS）网络的组合将多媒体内容传送到移动台的技术。可以使用可分级视频编码来使用移动/蜂窝网络和TVWS信道上的一个或多个增强层来传输多媒体内容的基线层。联合源信道编码可以用于基于最终用户体验来调整移动/蜂窝和/或TVWS使用的传输方案。

8. 发明授权

US06882679B2 Extension of wireless local area network communication system to accommodate higher data rates while preserving legacy receiver features 有权
标题翻译：扩展无线局域网通信系统以适应更高的数据速率，同时保留传统的接收机功能
公开(公告)号：US06882679B2
公开(公告)日：2005-04-19
申请号：US09753048
申请日：2000-12-29
申请人： V. Srinivasa Somayazulu , Srinivas Kandala , John M. Kowalski , Chan K. Park
发明人： V. Srinivasa Somayazulu , Srinivas Kandala , John M. Kowalski , Chan K. Park
IPC分类号： H04B1/69 , H04B15/00 , H04J13/16 , H04K1/00 , H04L27/20
CPC分类号： H04L27/2046 , H04J13/16 , H04L27/205
摘要： In a direct sequence spread spectrum data communication system an information bit is mixed with a pseudorandom noise or spreading code to produce modulated codeword for transmission. A method of bandwidth efficient M-ary phase shift key modulation encoding at least 16 bits of data to a single codeword is disclosed for extending the data rate of a spread spectrum system. Interoperability with legacy devices is maximized by maintaining structural similarity between the modulated waveforms of the extended data rate and legacy systems.
摘要翻译：在直接序列扩展频谱数据通信系统中，信息比特与伪随机噪声或扩展码混合以产生用于传输的调制码字。公开了一种用于扩展扩展频谱系统的数据速率的带宽有效M相移相关调制方法，其将至少16位的数据编码到单个码字。通过保持扩展数据速率的调制波形和传统系统之间的结构相似性，可以最大化与传统设备的互操作性。

9. 发明授权

US06205168B1 Sequential detection system and method with adaptive bias 失效
标题翻译：具有自适应偏差的顺序检测系统和方法
公开(公告)号：US06205168B1
公开(公告)日：2001-03-20
申请号：US09191461
申请日：1998-11-12
申请人： V. Srinivasa Somayazulu
发明人： V. Srinivasa Somayazulu
IPC分类号： A61F206
CPC分类号： H04B1/707
摘要： An adaptive CDMA sequential detection method is provided. The method permits the use of the sequential detection process to determine an unknown spreading code in an environment where the signal to noise ratio of the received signal varies. A communication system, such as W-CDMA, provides a periodic reference signal that the receiver can demodulate without the spreading code. The reference signal is used to estimate and constantly update the signal to noise calculation. From this estimate a bias is updated for use in the sequential detection of the spreading code. A system to update the CDMA sequential detector bias value is also provided.
摘要翻译：提供了一种自适应CDMA顺序检测方法。该方法允许使用顺序检测处理来确定接收信号的信噪比变化的环境中的未知扩展码。诸如W-CDMA的通信系统提供了接收机可以在没有扩展码的情况下解调的周期性参考信号。参考信号用于估计和不断更新信噪比计算。从该估计，更新偏置以用于扩展码的顺序检测。还提供了一种更新CDMA顺序检测器偏置值的系统。

10. 发明授权

US08401563B2 Downlink resource allocation and mapping 失效
标题翻译：下行资源分配和映射
公开(公告)号：US08401563B2
公开(公告)日：2013-03-19
申请号：US13235290
申请日：2011-09-16
申请人： Qinghua Li , Xintain E. Lin , V. Srinivasa Somayazulu , Minnie Ho
发明人： Qinghua Li , Xintain E. Lin , V. Srinivasa Somayazulu , Minnie Ho
IPC分类号： H04Q7/20
CPC分类号： H04L5/0007 , H04L5/0039 , H04L5/0041 , H04L5/0044 , H04L5/006 , H04L5/0064 , H04W72/12
摘要： Embodiments of the present invention provide for downlink resource allocation among a plurality of users. Other embodiments may be described and claimed.
摘要翻译：本发明的实施例提供了多个用户之间的下行链路资源分配。可以描述和要求保护其他实施例。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式