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1. 发明授权

US06744747B2 Method & apparatus for W-CDMA handoff searching 有权
标题翻译： W-CDMA切换搜索的方法与装置
公开(公告)号：US06744747B2
公开(公告)日：2004-06-01
申请号：US09935505
申请日：2001-08-22
申请人： Da-Shan Shiu , Parvathanathan Subrahmanya , Subramanya P.N. Rao
发明人： Da-Shan Shiu , Parvathanathan Subrahmanya , Subramanya P.N. Rao
IPC分类号： H04Q700
CPC分类号： H04B1/7083 , H04B2201/70701 , H04B2201/70702 , H04W36/00 , H04W48/16 , Y02D70/40
摘要： Techniques for improved handoff searching in asynchronous systems, such as W-CDMA, are disclosed. In one aspect, a two-step search procedure is used when a list of neighbor codes is known. In the first step, a received signal is correlated with a slot timing code to locate on or more pilots and the slot boundaries associated therewith. In the second step, the received signal is correlated with each of the list of codes at the slot boundaries identified with pilots in the first step to identify the pilot code and the frame timing associated with each pilot. Various other aspects of the invention are also presented. These aspects have the benefit of decreasing search time, which translates to increased acquisition speed, higher quality signal transmission, increased data throughput, decreased power, and improved overall system capacity.
摘要翻译：公开了用于在诸如W-CDMA之类的异步系统中改进切换搜索的技术。在一个方面，当已知邻居码列表时，使用两步搜索过程。在第一步骤中，接收的信号与时隙定时码相关联，以定位或多于其上的导频和与其相关联的时隙边界。在第二步骤中，接收到的信号与在第一步骤中用导频识别的时隙边界上的每个代码列表相关联，以识别与每个导频相关联的导频码和帧定时。还提出了本发明的各种其它方面。这些方面具有减少搜索时间的优点，这意味着增加的采集速度，更高质量的信号传输，增加的数据吞吐量，降低的功率以及整体系统容量的提高。

2. 发明申请

US20120142276A1 METHOD AND APPARATUS FOR DATA AIDED CHANNEL QUALITY ESTIMATION 失效
标题翻译：数据辅助信道质量估计的方法和装置
公开(公告)号：US20120142276A1
公开(公告)日：2012-06-07
申请号：US12960283
申请日：2010-12-03
申请人： Young Geun Cho , Aditya Dua , Feng Lu , Gokhan Mergen , Subramanya P.N. Rao , Abhinav Gupta , Parvathanathan Subrahmanya
发明人： Young Geun Cho , Aditya Dua , Feng Lu , Gokhan Mergen , Subramanya P.N. Rao , Abhinav Gupta , Parvathanathan Subrahmanya
IPC分类号： H04B17/00
CPC分类号： H04L1/20
摘要： Methods and apparatuses for data aided channel quality estimation using both pilot and data information are disclosed herein. In one exemplary aspect, a method for estimating channel quality in a wireless communication system is disclosed. The method comprises estimating a pilot noise variance based on a pilot signal received from a base station on a downlink and estimating a data noise variance based on a data signal received from the base station on the downlink. The method also comprises combining the pilot noise variance and the data noise variance to obtain a combined noise variance, and estimating the channel quality based on the combined noise variance.
摘要翻译：本文公开了使用导频和数据信息的数据辅助信道质量估计的方法和装置。在一个示例性方面，公开了一种用于估计无线通信系统中的信道质量的方法。该方法包括基于从下行链路上的基站接收的导频信号来估计导频噪声方差，并且基于在下行链路上从基站接收的数据信号来估计数据噪声方差。该方法还包括组合导频噪声方差和数据噪声方差以获得组合噪声方差，并且基于组合的噪声方差来估计信道质量。

3. 发明申请

US20120045024A1 METHODS AND APPARATUS FOR ITERATIVE DECODING IN MULTIPLE-INPUT-MULTIPLE-OUTPUT (MIMO) COMMUNICATION SYSTEMS 审中-公开
标题翻译：用于多输入多输出（MIMO）通信系统中迭代解码的方法和装置
公开(公告)号：US20120045024A1
公开(公告)日：2012-02-23
申请号：US13033545
申请日：2011-02-23
申请人： Tao Cui , Jia Tang , Andrew Sendonaris , Atul A. Salvekar , Subramanya P.N. Rao , Parvathanathan Subrahmanya , Lei Xiao , Michael L. McCloud , Brian Clarke Banister
发明人： Tao Cui , Jia Tang , Andrew Sendonaris , Atul A. Salvekar , Subramanya P.N. Rao , Parvathanathan Subrahmanya , Lei Xiao , Michael L. McCloud , Brian Clarke Banister
IPC分类号： H04L27/06
CPC分类号： H04L1/005 , H04L1/06 , H04L25/03242 , H04L25/067
摘要： Methods and apparatus for receiving, processing, and decoding MIMO transmissions in communications systems are described. A non-Gaussian approximation method for simplifying processing complexity where summations are used is described. Use of a priori information to facilitate determination of log likelihood ratios (LLRs) in receivers using iterative decoders is further described. A Gaussian or non-Gaussian approximation method using a priori information may be used to determine a K-best list of values for summation to generate an LLR is also described.
摘要翻译：描述了用于在通信系统中接收，处理和解码MIMO传输的方法和装置。描述了用于简化使用求和的处理复杂度的非高斯近似方法。进一步描述使用先验信息以便于使用迭代解码器确定接收机中的对数似然比（LLR）。也可以使用使用先验信息的高斯或非高斯近似方法来确定用于求和以产生LLR的K个最佳值列表。

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