公开(公告)号：US20080225781A1

公开(公告)日：2008-09-18

申请号：US12047527

申请日：2008-03-13

Applicant: Narayan Prasad ,  Xiaodong Wang ,  Mohammad Madihian

Inventor： Narayan Prasad ,  Xiaodong Wang ,  Mohammad Madihian

IPC: H04Q7/00

CPC classification number: H04L1/208 ,  H04B1/7105 ,  H04B1/71055 ,  H04B1/7107 ,  H04B2201/70702 ,  H04L1/0045 ,  H04L1/0606 ,  H04L1/0656 ,  H04L1/0668

Abstract: A method for decoding in a wireless downlink channel, where all dominant transmitting sources use inner codes from a particular set, including the steps of: estimating a channel matrix seen from each dominant transmitter source in response to a pilot or preamble signal transmitted by each such source; converting each estimated channel matrix into an effective channel matrix responsive to the inner code of the corresponding transmitting source; obtaining the received observations in a linear equivalent form whose output is an equivalent of the received observations and in which the effective channel matrix corresponding to each dominant transmitting source inherits the structure of its inner code; i) determining an order for processing each of the transmitting sources; ii) computing a filter for each transmitting source that will be decoded; iii) demodulating and decoding each transmitting source responsive to the determined order from step i) assuming perfect cancellation of signals of preceding or previously decoded transmitting sources; and iv) re-encoding the decoded message of each transmitting source, except the source decoded last, responsive to the modulation and coding scheme employed by the source and the corresponding effective channel matrix and subtracting it from the received observations in the equivalent linear form.

Abstract translation: 一种用于在无线下行链路信道中进行解码的方法，其中所有主要发送源使用来自特定集合的内部代码，包括以下步骤：响应于由每个这样发送的导频或前导信号，估计从每个主要发射机源看到的信道矩阵 资源; 响应于相应的发射源的内部码，将每个估计的信道矩阵转换成有效信道矩阵; 以等效的线性等价形式获得所接收的观测值，其输出等于所接收的观测值，并且其中对应于每个主要发射源的有效信道矩阵继承其内部码的结构; i）确定处理每个发送源的顺序; ii）计算将被解码的每个发射源的滤波器; iii）响应于来自步骤i）的所确定的顺序对每个发射源进行解调和解码，假设完全消除先前或先前解码的发射源的信号; 以及iv）响应于源采用的调制和编码方案以及对应的有效信道矩阵，并且以等效线性形式从接收到的观察中减去每个发送源的解码消息，除了最后解码的源之外，对每个发送源的解码消息进行重新编码。

公开(公告)号：US20080225763A1

公开(公告)日：2008-09-18

申请号：US12047555

申请日：2008-03-13

Applicant: Narayan Prasad ,  Xiaodong Wang ,  Mohammad Madihian

Inventor： Narayan Prasad ,  Xiaodong Wang ,  Mohammad Madihian

IPC: H04B7/00

CPC classification number: H04W88/06 ,  H04W4/06 ,  H04W24/00 ,  H04W84/042

Abstract: In accordance with the invention, a method includes the steps of: i) initializing with channel matrix estimates and inner codes of all co-channel transmitter sources in a wireless network, modulation and coding schemes of all sources not of interest; ii) converting each channel matrix estimate into an effective channel matrix responsive to the inner code of the corresponding transmitter source; iii) selecting iteratively from a first set of transmitter sources transmitting at fixed rates, a transmitter source which maximizes a first metric; iv) computing iteratively a filter for the transmitter source which maximizes the first metric; v) selecting iteratively from a second set of transmitter sources of interest, a transmitter source which maximizes a second metric; vi) computing iteratively a rate and a filter for the transmitter source which maximizes the second metric; and vii) obtaining an ordered set of indices of all transmitter sources that will be decoded along with their corresponding filters, and feedback rates for all transmitter sources of interest.

Abstract translation: 根据本发明，一种方法包括以下步骤：i）利用无线网络中的所有同频发射机源的信道矩阵估计和内码初始化，不感兴趣的所有源的调制和编码方案; ii）响应于相应发射机源的内部码，将每个信道矩阵估计转换成有效信道矩阵; iii）从以固定速率发送的第一组发射机源迭代地选择使得第一度量最大化的发射机源; iv）迭代地计算用于使第一度量最大化的发射机源的滤波器; v）从第二组感兴趣的发射源迭代地选择最大化第二度量的发射机源; vi）迭代地计算用于使第二度量最大化的发射机源的速率和滤波器; 以及vii）获得将被解码的所有发射机源的有序集合以及其相应的滤波器，以及所有感兴趣的发射机源的反馈速率。

公开(公告)号：US20070283210A1

公开(公告)日：2007-12-06

申请号：US11694241

申请日：2007-03-30

Applicant: Narayan Prasad ,  Xiaodong Wang ,  Mohammad Madihian

Inventor： Narayan Prasad ,  Xiaodong Wang ,  Mohammad Madihian

IPC: H03M13/00

CPC classification number: H03M13/01 ,  H04L1/0631 ,  H04L1/0637

Abstract: Methods and apparatus for designing spherical lattice codebooks for use in data transmission systems are provided. A spherical lattice codebook is constructed by determining the channel statistics of one or more channels, which can be accomplished by observing a sufficiently large set of channel realizations. After determining the channel statistics, an expression for the error probability of the decoder or expressions for bounds on the error probability and expressions for the corresponding gradients are determined. The gradient is then used in an optimization technique to produce a spherical lattice codebook which is subsequently used for transmission.

Abstract translation: 提供了用于数据传输系统中使用的球面晶格码本的方法和装置。 通过确定一个或多个信道的信道统计量来构造球面晶格码本，其可以通过观察足够大的信道实现集来实现。 在确定信道统计后，确定解码器的错误概率或对于对应梯度的误差概率和表达式的边界的表达式的表达式。 然后将梯度用于优化技术中以产生随后用于传输的球形晶格码本。

公开(公告)号：US07293638B2

公开(公告)日：2007-11-13

申请号：US11457953

申请日：2006-07-17

Applicant: Partha Bhattacharjee ,  Anjali Chatterjee ,  Rajesh Wasudeorao Lanjewar ,  Umesh Shrikrishna Patkar ,  Narayan Prasad Mukherjee

Inventor： Partha Bhattacharjee ,  Anjali Chatterjee ,  Rajesh Wasudeorao Lanjewar ,  Umesh Shrikrishna Patkar ,  Narayan Prasad Mukherjee

IPC: B65G47/00

CPC classification number: B65G47/24 ,  A23N15/00 ,  B65G2201/0211

Abstract: The present invention relates to an orientation unit for a fruit sorting and grading machine, for rolling apples around their major axes at a fixed rpm depending upon the imaging and processing speed so as to make it possible for the camera to scan the entire periphery of each apple. This orientation unit of the present invention consists of a pair of rollers, wherein each of the rollers has a conical profile on one side and a flat laminar surface on the other side to orient an apple of any shape with its major axis aligned along the axis of rotation. This set of rollers is spring loaded to make it possible for the rollers move to and fro to accommodate apples of size ranging from 60 mm to 100 mm. A rotating belt is provided underneath the rollers to rotate the fruits at a desired rpm so that a camera with an image processing system can scan the entire periphery of the fruit, including the size and shape, and surface bruises, and grade them into multiple categories in terms of quality.

Abstract translation: 本发明涉及一种用于水果分选和分级机的定向单元，用于根据成像和处理速度以固定的rpm在其长轴上围绕苹果滚动苹果，以使相机能够扫描每个 苹果。 本发明的该取向单元由一对辊构成，其中每个辊在一侧具有锥形轮廓，在另一侧具有平坦的层状表面，以使任何形状的苹果定向，其长轴沿轴线对准 的旋转。 这组辊子是弹簧加载的，以便辊子可以来回移动以容纳尺寸范围从60mm到100mm的苹果。 旋转带设置在辊子下方，以期望的转速旋转果实，使得具有图像处理系统的照相机可以扫描果实的整个周边，包括尺寸和形状以及表面瘀伤，并将其分级成多个类别 在质量方面。

公开(公告)号：US20070004366A1

公开(公告)日：2007-01-04

申请号：US11428386

申请日：2006-07-01

Applicant: Narayan Prasad ,  Xiaodong Wang ,  Mohammad Madihian

Inventor： Narayan Prasad ,  Xiaodong Wang ,  Mohammad Madihian

IPC: H04B7/08 ,  H04B1/06 ,  H04B7/00 ,  H04M1/00

CPC classification number: H04L25/03006 ,  H04L2025/03426

Abstract: A group detection arrangement for a multiple antenna receiver structure usable with a multiuser multiple access communication channel with fading is herein disclosed. The group detection arrangement uses an optimized channel dependent group partitioning technique.

Abstract translation: 本文公开了一种可用于具有衰落的多用户多址通信信道的多天线接收机结构的组检测装置。 组检测装置使用优化的信道相关组分割技术。