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1. 发明授权

US07499490B2 Encoders for block-circulant LDPC codes 有权
标题翻译：块循环LDPC码编码器
公开(公告)号：US07499490B2
公开(公告)日：2009-03-03
申请号：US11166041
申请日：2005-06-24
申请人： Dariush Divsalar , Aliazam Abbasfar , Christopher R. Jones , Samuel J. Dolinar , Jeremy C. Thorpe , Kenneth S. Andrews , Kung Yao
发明人： Dariush Divsalar , Aliazam Abbasfar , Christopher R. Jones , Samuel J. Dolinar , Jeremy C. Thorpe , Kenneth S. Andrews , Kung Yao
IPC分类号： H04B1/66
CPC分类号： H03M13/1194 , H03M13/116 , H04L1/0041 , H04L1/0057
摘要： Methods and apparatus to encode message input symbols in accordance with an accumulate-repeat-accumulate code with repetition three or four are disclosed. Block circulant matrices are used. A first method and apparatus make use of the block-circulant structure of the parity check matrix. A second method and apparatus use block-circulant generator matrices.
摘要翻译：公开了根据具有重复三或四的累加重复累加码对消息输入符号进行编码的方法和装置。使用块循环矩阵。第一种方法和装置利用奇偶校验矩阵的块循环结构。第二种方法和装置使用块循环发生器矩阵。

2. 发明授权

US07343539B2 ARA type protograph codes 有权
标题翻译： ARA型原型码
公开(公告)号：US07343539B2
公开(公告)日：2008-03-11
申请号：US11166040
申请日：2005-06-24
申请人： Dariush Divsalar , Aliazam Abbasfar , Christopher R. Jones , Samuel J. Dolinar , Jeremy C. Thorpe , Kenneth S. Andrews , Kung Yao
发明人： Dariush Divsalar , Aliazam Abbasfar , Christopher R. Jones , Samuel J. Dolinar , Jeremy C. Thorpe , Kenneth S. Andrews , Kung Yao
IPC分类号： H03M13/29
CPC分类号： H03M13/1197 , H03M13/1194
摘要： An apparatus and method for encoding low-density parity check codes. Together with a repeater, an interleaver and an accumulator, the apparatus comprises a precoder, thus forming accumulate-repeat-accumulate (ARA codes). Protographs representing various types of ARA codes, including AR3A, AR4A and ARJA codes, are described. High performance is obtained when compared to the performance of current repeat-accumulate (RA) or irregular-repeat-accumulate (IRA) codes.
摘要翻译：一种用于编码低密度奇偶校验码的装置和方法。与中继器，交织器和累加器一起，该装置包括预编码器，从而形成累加重复累加（ARA码）。描述代表各种类型的ARA代码的原型，包括AR3A，AR4A和ARJA代码。与当前重复累积（RA）或不规则重复累积（IRA）码的性能相比，获得了高性能。

3. 发明申请

US20060291571A1 Encoders for block-circulant LDPC codes 有权
公开(公告)号：US20060291571A1
公开(公告)日：2006-12-28
申请号：US11166041
申请日：2005-06-24
申请人： Dariush Divsalar , Aliazam Abbasfar , Christopher Jones , Samuel Dolinar , Jeremy Thorpe , Kenneth Andrews , Kung Yao
发明人： Dariush Divsalar , Aliazam Abbasfar , Christopher Jones , Samuel Dolinar , Jeremy Thorpe , Kenneth Andrews , Kung Yao
IPC分类号： H04B14/04
CPC分类号： H03M13/1194 , H03M13/116 , H04L1/0041 , H04L1/0057
摘要： Methods and apparatus to encode message input symbols in accordance with an accumulate-repeat-accumulate code with repetition three or four are disclosed. Block circulant matrices are used. A first method and apparatus make use of the block-circulant structure of the parity check matrix. A second method and apparatus use block-circulant generator matrices.

4. 发明申请

US20060294445A1 ARA type protograph codes 有权
标题翻译： ARA型原型码
公开(公告)号：US20060294445A1
公开(公告)日：2006-12-28
申请号：US11166040
申请日：2005-06-24
申请人： Dariush Divsalar , Aliazam Abbasfar , Christopher Jones , Samuel Dolinar , Jeremy Thorpe , Kenneth Andrews , Kung Yao
发明人： Dariush Divsalar , Aliazam Abbasfar , Christopher Jones , Samuel Dolinar , Jeremy Thorpe , Kenneth Andrews , Kung Yao
IPC分类号： H03M13/05
CPC分类号： H03M13/1197 , H03M13/1194
摘要： An apparatus and method for encoding low-density parity check codes. Together with a repeater, an interleaver and an accumulator, the apparatus comprises a precoder, thus forming accumulate-repeat-accumulate (ARA codes). Protographs representing various types of ARA codes, including AR3A, AR4A and ARJA codes, are described. High performance is obtained when compared to the performance of current repeat-accumulate (RA) or irregular-repeat-accumulate (IRA) codes.
摘要翻译：一种用于编码低密度奇偶校验码的装置和方法。与中继器，交织器和累加器一起，该装置包括预编码器，从而形成累加重复累加（ARA码）。描述代表各种类型的ARA代码的原型，包括AR3A，AR4A和ARJA代码。与当前重复累积（RA）或不规则重复累积（IRA）码的性能相比，获得了高性能。

5. 发明授权

US09165615B2 Coded differential intersymbol interference reduction 有权
标题翻译：编码差分符号间干扰减少
公开(公告)号：US09165615B2
公开(公告)日：2015-10-20
申请号：US13636515
申请日：2011-03-14
申请人： Amir Amirkhany , Aliazam Abbasfar , Kambiz Kaviani , Wendemagegnehu Beyene , Carl Werner
发明人： Amir Amirkhany , Aliazam Abbasfar , Kambiz Kaviani , Wendemagegnehu Beyene , Carl Werner
IPC分类号： G11C8/00 , G11C7/10 , G11C7/02
CPC分类号： G11C7/1006 , G11C7/02
摘要： Encoder and decoder circuits that encode and decode a series of data words to/from a series of code words. The data words include L symbols. The code words include M symbols, where M is larger than L. A set of tightly coupled M links to convey respective symbols in each of the series of code words. The code words are selected such that between every two consecutive code words in a series of code words, an equal number of transitions from low to high and high to low occur on a subset of the M-links.
摘要翻译：编码器和解码器电路，用于对一系列代码字进行编码和解码一系列数据字。数据字包括L个符号。代码字包括M个符号，其中M大于L.一组紧密耦合的M个链路，用于在每一个码字序列中传送相应的符号。选择码字使得在一系列码字中的每两个连续码字之间，在M链路的子集上出现从低到高和高到低的相等数量的转换。

6. 发明申请

US20110184999A1 Linear Transformation Circuit 审中-公开
标题翻译：线性变换电路
公开(公告)号：US20110184999A1
公开(公告)日：2011-07-28
申请号：US13083473
申请日：2011-04-08
申请人： Aliazam Abbasfar , Amir Amirkhany , Vladimir Stojanovic , Mark A. Horowitz
发明人： Aliazam Abbasfar , Amir Amirkhany , Vladimir Stojanovic , Mark A. Horowitz
IPC分类号： G06F17/14
CPC分类号： G06J1/00
摘要： A first device includes a linear transformation circuit to implement multiplication by a matrix D. The linear transformation circuit as an input to receive a vector having N digital values and an output to output N first output signals. The linear transformation circuit optionally includes a sign-adjustment circuit to adjust signs of a subset including at least M of the N first output signals in accordance with a set of coefficients H. The linear transformation circuit includes a digital-to-analog conversion (DAC) circuit coupled to the output of the sign-adjustment circuit. Outputs from the DAC circuit are summed to produce an output.
摘要翻译：第一装置包括用矩阵D进行乘法的线性变换电路。线性变换电路作为用于接收具有N个数字值的矢量和输出以输出N个第一输出信号的输入。线性变换电路可选地包括符号调整电路，用于根据一组系数H来调整包括至少M个N个第一输出信号的子集的符号。线性变换电路包括数模转换（DAC））电路耦合到符号调节电路的输出。来自DAC电路的输出相加以产生输出。

7. 发明申请

US20100259449A1 TECHNIQUE FOR DETERMINING AN ANGLE OF ARRIVAL IN A COMMUNICATION SYSTEM 有权
标题翻译：用于确定通信系统中的任何角度的技术
公开(公告)号：US20100259449A1
公开(公告)日：2010-10-14
申请号：US12678463
申请日：2008-09-02
申请人： Aliazam Abbasfar
发明人： Aliazam Abbasfar
IPC分类号： G01S1/30 , G01S5/04
CPC分类号： H04B7/086 , H04B7/0619
摘要： Embodiments of a circuit are described. In this circuit, a transmit circuit provides signals to antenna elements during an acquisition mode, where a given signal to a given antenna element includes at least two frequency components having associated phases, and where the phase of a given frequency component in the given signal is different from phases of the given frequency component for the other antenna elements. Moreover, an output node couples the transmit circuit to the antenna elements that transmit the signals. Note that these signals establish an angle of a communication path between the circuit and another circuit.
摘要翻译：描述电路的实施例。在该电路中，发射电路在采集模式期间向天线元件提供信号，其中给定天线元件的给定信号包括具有相关相位的至少两个频率分量，并且其中给定信号中的给定频率分量的相位为不同于其他天线元件的给定频率分量的相位。此外，输出节点将发送电路耦合到发送信号的天线元件。注意，这些信号建立电路和另一电路之间的通信路径的角度。

8. 发明申请

US20100235673A1 SIMPLIFIED RECEIVER FOR USE IN MULTI-WIRE COMMUNICATION 有权
标题翻译：用于多线通信的简化接收器
公开(公告)号：US20100235673A1
公开(公告)日：2010-09-16
申请号：US12679465
申请日：2008-09-30
申请人： Aliazam Abbasfar
发明人： Aliazam Abbasfar
IPC分类号： G06F1/04 , G06F7/50
CPC分类号： H03M13/3761 , H03M7/20
摘要： An encoder encodes data into a series of parallel codewords. Each codeword is expressed two sets of logic values (e.g., a set of logic 0s and a set of logic 1s) on output nodes. The encoder selects a current codeword from a group of codewords in a codespace which does not overlap the other group of codewords, i.e., codewords in a given group of codewords are not included in any other group of codewords in the codespace. This property allows a receiver of the codewords to be simplified. In particular, a mathematical operation performed on symbols in the current codeword uniquely specifies the corresponding group of codewords. This allows a decoder to decode the current codeword using comparisons of symbols received on a subset of all possible combinations of node pairs.
摘要翻译：编码器将数据编码成一系列并行码字。每个码字在输出节点上被表示为两组逻辑值（例如，一组逻辑0和一组逻辑1）。编码器在代码空间中从不与另一组码字重叠的码字组中选择当前码字，即，给定码字组中的码字不包括在码空间中任何其他码字组中。该属性允许简化码字的接收者。特别地，对当前码字中的符号执行的数学运算唯一地指定相应的码字组。这允许解码器使用在节点对的所有可能组合的子集上接收的符号的比较来解码当前码字。

9. 发明申请

US20100040169A1 CODING METHODS AND SYSTEMS FOR IMPROVED ERROR MARGINS 审中-公开
标题翻译：改进错误标记的编码方法和系统
公开(公告)号：US20100040169A1
公开(公告)日：2010-02-18
申请号：US12511753
申请日：2009-07-29
申请人： Aliazam Abbasfar
发明人： Aliazam Abbasfar
IPC分类号： H04L27/00 , H04L27/06 , H03M7/00
CPC分类号： H04L25/4906 , H03M5/145
摘要： Each symbol in a sequence of codewords is expressed as a voltage level representative of a one or zero, and each codeword includes both levels. Sense amplifiers at the receiver compare all pairs of symbols in each codeword. Comparisons based upon like symbol values provide mid-range sensed voltages, and comparisons based upon disparate symbols values provide relatively higher or lower sensed voltages. Sampling the high and low voltages produces determinate sample values, whereas sampling the midrange voltage produces indeterminate sample values. Sampling the sensed voltages thus produces a mix of indeterminate and determinate values for each codeword. Codewords are selected such that the number and placement of the determinate sample values identify each codeword, and subsequent codewords are selected so the nodes supporting the high and low sensed voltages sampled to obtain the determinate sample values transitioned to their current voltage from either the intermediate voltage or did not transition.
摘要翻译：码字序列中的每个符号表示为表示一个或者零的电压电平，并且每个码字包括两个电平。接收机的感应放大器比较每个码字中的所有符号对。基于类似符号值的比较提供中距离感测电压，并且基于不同符号值的比较提供相对较高或较低的感测电压。对高电压和低电压进行采样会产生确定的采样值，而采样中频电压会产生不确定的采样值。对感测到的电压进行采样从而为每个码字产生不确定和确定的值的混合。选择代码字使得确定样本值的数量和位置识别每个码字，并且选择随后的码字，使得支持采样的高和低感测电压的节点以获得确定的采样值从中间电压转换到其当前电压还是没有过渡。

10. 发明申请

US20070279228A1 Media access control and signaling protocol for low power, large-scale wireless networks 审中-公开
标题翻译：用于低功耗，大规模无线网络的媒体接入控制和信令协议
公开(公告)号：US20070279228A1
公开(公告)日：2007-12-06
申请号：US11809343
申请日：2007-05-31
申请人： Martin Morris , Anand Anandakumar , Aliazam Abbasfar
发明人： Martin Morris , Anand Anandakumar , Aliazam Abbasfar
IPC分类号： G08B13/14 , G06F17/00 , G08B5/22
CPC分类号： G07G1/14 , G06Q10/087 , G06Q30/06
摘要： An implementation of a signaling protocol for low power and large scale wireless networks provides a media access control (MAC) that produces a low rate two-way communication link between a commercial infrastructure and a very large number of small, low-cost devices known as electronic tags. The numerous tags attached to merchandise or shelves communicate with a number of access points (AP) distributed throughout a facility containing merchandise for sale or storage. A store controller maintains the pricing database for the point of sale (POS) registers of the facility. Price changes are transmitted in real time to the tag, thus updating the merchandise tags and the point of sales (POS) registers simultaneously. The tags contain a controller and a battery in which conservation of power is crucial to the life of the tags.
摘要翻译：用于低功率和大规模无线网络的信令协议的实现提供了媒体接入控制（MAC），其在商业基础设施和大量小型，低成本的设备之间产生低速率双向通信链路，称为电子标签。连接到商品或货架上的许多标签与分发在包含销售或存储商品的设施的多个接入点（AP）通信。商店控制器维护设施的销售点（POS）寄存器的定价数据库。价格变化实时传输到标签，从而同时更新商品标签和销售点（POS）寄存器。标签包含控制器和电池，其中电力守恒对于标签的寿命至关重要。

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