公开(公告)号：US07012911B2

公开(公告)日：2006-03-14

申请号：US09871563

申请日：2001-05-31

申请人： Nitin Kasturi ,  Rajat Rajinderkumar Dhawan ,  Daisuke Terasawa ,  Avneesh Agrawal ,  Arak Sutivong

发明人： Nitin Kasturi ,  Rajat Rajinderkumar Dhawan ,  Daisuke Terasawa ,  Avneesh Agrawal ,  Arak Sutivong

IPC分类号： H04B7/20 ,  H04J3/02 ,  H04Q7/00

CPC分类号： H04L1/0071 ,  H04J13/00 ,  H04L1/0041 ,  H04L1/0065 ,  H04L1/08

摘要： Techniques for efficient W-CDMA modulation are disclosed. In one aspect, a multiplexing/coding chain for use in modulation such as that defined by the W-CDMA specification is disclosed. In another aspect, transport blocks are processed and concatenated, utilizing memory efficiently. This aspect has the further benefit of preparing transport channels for efficient subsequent processing. It also allows for ease of interface with the transport channel source. In another aspect, the use of repeated channel coding is used in lieu of an interleaver memory to provide channel coding and interleaving. These aspects, collectively, yield the advanced benefits of a system, such as W-CDMA, in a hardware efficient manner. The techniques described herein apply equally to both access points and access terminals. The techniques are not limited to W-CDMA systems; they are quite suitable to other systems requiring the various benefits the invention offers. Various other aspects of the invention are also presented.

公开(公告)号：US07212631B2

公开(公告)日：2007-05-01

申请号：US09920784

申请日：2001-08-01

申请人： Roberto Fabian Averbuj ,  Pradeep Kumar Mishra ,  Rajat Rajinderkumar Dhawan

发明人： Roberto Fabian Averbuj ,  Pradeep Kumar Mishra ,  Rajat Rajinderkumar Dhawan

IPC分类号： H04L9/00

CPC分类号： H04L9/0625 ,  H04L2209/12 ,  H04L2209/24

摘要： Techniques for efficient KASUMI ciphering are disclosed. In one aspect, one KASUMI round for generating a fractional portion of the KASUMI cipher is deployed with appropriate feedback such that eight sequential rounds produce the KASUMI output. In another aspect, one third of the FO function is deployed with appropriate feedback such that three successive cycles produce the FO output. In yet another aspect, the FI function is deployed with appropriate feedback such that two subsequent cycles produce the FI output. In yet another aspect, a sub-key generator comprising two shift registers produces sub-keys for each round and sub-stage thereof in an efficient manner. These aspects, collectively, yield the advanced benefits of low area and low cost implementations of KASUMI with a simple user interface. Various other aspects of the invention are also presented.

摘要翻译： 公开了用于高效KASUMI加密的技术。 在一个方面，用适当的反馈部署用于产生KASUMI密码的小数部分的一个KASUMI循环，使得八个连续循环产生KASUMI输出。 在另一方面，FO功能的三分之一部署有适当的反馈，使得三个连续的周期产生FO输出。 在另一方面，FI功能部署有适当的反馈，使得两个后续周期产生FI输出。 在另一方面，一种包括两个移位寄存器的子密钥生成器以有效的方式为其每个轮次和子级产生子密钥。 通过简单的用户界面，这些方面统一地产生了KASUMI的低面积和低成本实施的先进优势。 还提出了本发明的各种其它方面。

公开(公告)号：US08089486B2

公开(公告)日：2012-01-03

申请号：US11086474

申请日：2005-03-21

申请人： Michael Hugh Anderson ,  Dan Minglun Chuang ,  Geoffrey Shippee ,  Rajat Rajinderkumar Dhawan ,  Chun Yu

发明人： Michael Hugh Anderson ,  Dan Minglun Chuang ,  Geoffrey Shippee ,  Rajat Rajinderkumar Dhawan ,  Chun Yu

IPC分类号： G06T1/20

CPC分类号： G06T15/005

摘要： A 3D graphics pipeline includes a prefetch mechanism that feeds a cache of depth tiles. The prefetch mechanism may be predictive, using triangle geometry information from previous pipeline stages to pre-charge the cache, thereby allowing for an increase in memory bandwidth efficiency. A z-value compression technique may be optionally utilized to allow for a further reduction in power consumption and memory bandwidth.

摘要翻译： 3D图形流水线包括一个预取机制，它提供一个深度瓦片的缓存。 预取机制可以是预测的，使用来自先前流水线级的三角形几何信息来对高速缓存进行预充电，从而允许增加存储器带宽效率。 可以可选地使用z值压缩技术来允许进一步降低功耗和存储器带宽。