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1. 发明申请

US20050010854A1 Unified serial/parallel concatenated convolutional code decoder architecture and method 有权
标题翻译：统一串行/并行级联卷积码解码器架构与方法
公开(公告)号：US20050010854A1
公开(公告)日：2005-01-13
申请号：US10608831
申请日：2003-06-26
申请人： Mark Bickerstaff
发明人： Mark Bickerstaff
IPC分类号： H03M13/29 , H03M13/45 , H03M13/00
CPC分类号： H03M13/3905 , H03M13/2957 , H03M13/2972 , H03M13/2978 , H03M13/395 , H03M13/6511
摘要： A turbo decoder having two modes of operation decodes received information as per an N-state Radix-K trellis where N and K are integers equal to 1 or greater. The turbo decoder uses an in-line addressing technique that allows it to operate as a Serial Convolutional Code decoder in the first mode of operation and a Parallel Convolutional Code decoder in the second mode of operation. The decoder uses an in line addressing technique that allows it to use the same block of memory to store and retrieve states of the trellis as it processes received information. The turbo decoder can also operate as per an N-state Radix-K trellis where N is an integer equal to 2 or greater and K is an integer equal to 4 or greater.
摘要翻译：具有两种操作模式的turbo解码器根据N状态的基数K格网解码接收到的信息，其中N和K是等于1或更大的整数。 turbo解码器使用在线寻址技术，其允许其在第一操作模式中作为串行卷积码解码器操作，并且在第二操作模式中使用并行卷积码解码器。解码器使用在线寻址技术，允许它在处理接收到的信息时使用相同的存储器块来存储和检索格状态。 turbo解码器也可以按照N状态的基数K网格进行操作，其中N是等于2或更大的整数，K是等于4或更大的整数。

2. 发明申请

US20070050694A1 Modified branch metric calculator to reduce interleaver memory and improve performance in a fixed-point turbo decoder 失效
标题翻译：改进的分支度量计算器，以减少交织器存储器并提高定点turbo解码器的性能
公开(公告)号：US20070050694A1
公开(公告)日：2007-03-01
申请号：US11212186
申请日：2005-08-26
申请人： Mark Bickerstaff , Benjamin Widdup
发明人： Mark Bickerstaff , Benjamin Widdup
IPC分类号： H03M13/00
CPC分类号： H03M13/2957 , H03M13/2771 , H03M13/3927
摘要： A turbo decoder that calculates alpha, beta and gamma (branch metric) values does not normalize the branch metric but instead applies the normalization factor to the newly calculated extrinsic values before writing them to interleaving memory, resulting in use of less memory than in prior turbo decoders. A compensating factor is applied when the extrinsics are read from interleaving memory. The absence of normalization in the gamma calculation not only conserves memory but also enhances decoder sensitivity.
摘要翻译：计算α，β和γ（分支度量）值的turbo解码器不会使分支度量标准化，而是在将它们写入交织存储器之前将归一化因子应用于新计算的外在值，导致使用比现有涡轮机更少的存储器解码器当从交织存储器中读取二进制时，应用补偿因子。伽马计算中不存在归一化不仅节约了存储器，而且增强了解码器的灵敏度。

3. 发明申请

US20060242476A1 Pre-emptive interleaver address generator for turbo decoders 有权
标题翻译： turbo解码器的抢占交织器地址发生器
公开(公告)号：US20060242476A1
公开(公告)日：2006-10-26
申请号：US11103489
申请日：2005-04-12
申请人： Mark Bickerstaff , Yi-Chen Li , Chris Nicol , Bejamin Widdup
发明人： Mark Bickerstaff , Yi-Chen Li , Chris Nicol , Bejamin Widdup
IPC分类号： G11C29/00
CPC分类号： H03M13/2775 , H03M13/2714 , H03M13/276 , H03M13/2771 , H03M13/6516 , H03M13/6519
摘要： An interleaver address generator is provided with pruning avoidance technology. It anticipates the points in time when incorrect addresses are computed by an IAG, and bypasses these events. It produces a stream of valid, contiguous addresses for all specified code block sizes. A single address computation engine firstly ‘trains’ itself about violating generated addresses (for a related block size) during the initial H1 half-iteration of decoder operation, and then produces a continuous, correct stream of addresses as required by the turbo decoder. Thus regions of pruned addresses are determined, and then training is performed only in these regions. Thus, computation and population of a pruned event table is determined in less than 1/10 the time required to do a conventional style full training. The resulting pruned event table is compressed down to 256 bits.
摘要翻译：交织器地址发生器具有修剪避免技术。它预计在IAG计算不正确地址的时间点，并绕过这些事件。它为所有指定的代码块大小生成一个有效，连续的地址流。单个地址计算引擎首先在解码器操作的初始H1半迭代期间“违反”生成的地址（对于相关块大小）进行“训练”，然后根据turbo解码器的要求产生连续的正确的地址流。因此，确定了修剪地址的区域，然后仅在这些区域中执行训练。因此，修剪事件表的计算和人口在不到传统风格完全训练所需时间的1/10内确定。生成的修剪事件表被压缩到256位。

4. 发明授权

US5858038A Dust separation apparatus 失效
标题翻译：除尘设备
公开(公告)号：US5858038A
公开(公告)日：1999-01-12
申请号：US850000
申请日：1997-08-11
申请人： James Dyson , Andrew Walter McRae Thomson , Simon Mark Bickerstaff
发明人： James Dyson , Andrew Walter McRae Thomson , Simon Mark Bickerstaff
IPC分类号： B08B13/00 , A47L9/16 , B04C5/181 , B04C5/185 , B08B5/04 , B01D45/12
CPC分类号： A47L9/1658 , B04C5/185 , Y10S55/02 , Y10S55/03
摘要： An apparatus (10) for separating dirt or dust from an airflow comprising a frustoconical cyclone (12) having a tangential air inlet (16) located at or adjacent the end of the cyclone (12) having the larger diameter and a cone opening (18) located at the end of the cyclone (12) having the smaller diameter is described. A collector (20) is arranged so as to surround the cone opening (18) and has a base surface (24) facing towards the cone opening (18). The distance between the cone opening (18) and the base surface (24) is between 4 and 6 mm or between 45 and 60 mm. The apparatus (10) is reduced in size without substantially affecting the separation efficiency.
摘要翻译： PCT No.PCT / GB95 / 02987第 371日期1997年8月11日 102（e）日期1997年8月11日PCT 1995年12月20日PCT PCT。 WO96 / 19294 PCT公开号日期1996年6月27日一种用于从包含截头圆锥形旋风器（12）的气流分离污垢或灰尘的装置（10），该截头圆锥形旋风分离器（12）具有位于或邻近具有较大直径的旋风分离器（12）的端部处或其附近的切向空气入口（16）描述了位于具有较小直径的旋风分离器（12）端部处的锥形开口（18）。收集器（20）被布置成围绕锥形开口（18）并具有面向锥形开口（18）的基面（24）。锥形开口（18）与基面（24）之间的距离为4至6mm或45至60mm之间。设备（10）的尺寸减小而基本上不影响分离效率。

5. 发明申请

US20070038914A1 Method and apparatus for block and rate independent decoding of LDPC codes 失效
标题翻译：用于LDPC码的块和速率独立解码的方法和装置
公开(公告)号：US20070038914A1
公开(公告)日：2007-02-15
申请号：US11191158
申请日：2005-07-27
申请人： Mark Bickerstaff , Graeme Pope , Benjamin Widdup , Graeme Woodward
发明人： Mark Bickerstaff , Graeme Pope , Benjamin Widdup , Graeme Woodward
IPC分类号： H03M13/00
CPC分类号： H03M13/116 , H03M13/1111 , H03M13/6516
摘要： Methods and apparatus are provided for block and rate independent decoding of LDPC codes. The disclosed LDPC decoders support multiple code block lengths and code rates, as well as a variable parity check matrix. The disclosed LDPC decoders decode LDPC codes that are based on a parity check matrix having a plurality of sub-matrices, wherein each row and column of the plurality of sub-matrices has a single entry. Each of the sub-matrices has at least one associated Phi-node, wherein each Phi-node comprises a memory device having a plurality of memory elements, wherein one or more of the memory elements may be selectively disabled. The Phi-nodes may be selectively disabled, for example, at run-time. The Phi-node optionally further comprises a multiplexer in order to provide a variable parity check matrix.
摘要翻译：提供了用于LDPC码的块速率独立解码的方法和装置。所公开的LDPC解码器支持多个码块长度和码率，以及可变奇偶校验矩阵。所公开的LDPC解码器对基于具有多个子矩阵的奇偶校验矩阵的LDPC码进行解码，其中多个子矩阵中的每一行和列具有单个条目。每个子矩阵具有至少一个相关联的Phi节点，其中每个Phi节点包括具有多个存储器元件的存储器件，其中一个或多个存储器元件可被选择性地禁用。 Phi节点可以被选择性地禁用，例如在运行时。 Phi节点可选地还包括多路复用器以提供可变奇偶校验矩阵。

6. 发明授权

US5893938A Dust separation apparatus 失效
标题翻译：除尘设备
公开(公告)号：US5893938A
公开(公告)日：1999-04-13
申请号：US860112
申请日：1997-08-08
申请人： James Dyson , Andrew Walter McRae Thomson , Simon Mark Bickerstaff
发明人： James Dyson , Andrew Walter McRae Thomson , Simon Mark Bickerstaff
IPC分类号： A47L9/16 , B01D45/12 , B04C5/185
CPC分类号： A47L9/1658 , B01D45/12 , B04C5/185
摘要： The invention provides apparatus (10) for separating dirt or dust from an airflow including a frustoconical cyclone (12) having a tangential air inlet (16) located at or adjacent the end of the cyclone having the larger diameter and a cone opening (18) located at the end of the cyclone having the smaller diameter. A collector (20) is arranged so as to surround the cone opening and has a base surface (24) facing towards the cone opening. According to the invention, at least a portion (24a) of the base surface is conical or frusto-conical in shape and a dust-retaining wall (30) is provided spaced from the center of the base surface. This allows the apparatus to be reduced in size without substantially affecting the separation efficiency
摘要翻译： PCT No.PCT / GB95 / 02986 Sec。 371日期：1997年8月8日 102（e）日期1997年8月8日PCT 1995年12月20日PCT PCT。 WO96 / 19293 PCT出版物日期1996年6月27日本发明提供了用于从包括截头圆锥形旋风器（12）的气流中分离污垢或灰尘的装置（10），该截头圆锥形旋风器（12）具有位于具有较大直径的旋风分离器的端部处或邻近旋转器末端的切向空气入口（16）锥形开口（18）位于具有较小直径的旋风分离器的端部。收集器（20）被布置成围绕锥形开口并且具有面向锥形开口的基面（24）。根据本发明，基部表面的至少一部分（24a）的形状为圆锥形或截头圆锥形，并且防尘壁（30）设置成与基面的中心间隔开。这使得装置的尺寸减小而基本上不影响分离效率

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