公开(公告)号：US08386549B1

公开(公告)日：2013-02-26

申请号：US12042260

申请日：2008-03-04

Applicant: Alvin M. Despain

Inventor： Alvin M. Despain

IPC: G06F17/10

CPC classification number: G06F17/10 ,  H03H17/0248 ,  H04B1/7105 ,  H04B2201/70713 ,  H04B2201/709745 ,  H04B2201/709763 ,  H04B2201/709772

Abstract: Multistage Wiener filters (MWF) represent a component of the MWF as an un-normalized vector of filter coefficients within a finite impulse response (FIR) filter in a manner that avoids reliance on the 2-norm operation of the un-normalized vector of coefficients. The 2-norm operation can be replaced by less expensive operations performed elsewhere in the MWF. Preferably the filter adds only a few additional addition, subtraction and multiplication operations to compensate for the elimination of the square root and the division operations used for the 2-norm operation. As a result, it is possible to eliminate all or nearly all of the square rod and arithmetic division operations of at least some implementations of the MWF.

Abstract translation: 多级维纳滤波器（MWF）以有限脉冲响应（FIR）滤波器中的滤波器系数的非归一化向量作为MWF的分量，以避免依赖于系数的非归一化矢量的2范数运算 。 可以通过在MWF其他地方执行的较廉价的操作来代替2规范操作。 优选地，滤波器仅添加少量附加，减法和乘法运算，以补偿平方根的消除和用于2范数运算的除法运算。 结果，可以消除MWF的至少一些实施方式的所有或几乎所有的方棒和算术分割操作。

公开(公告)号：US09897702B2

公开(公告)日：2018-02-20

申请号：US14882598

申请日：2015-10-14

Applicant: The Boeing Company

Inventor： Philip L. Wei ,  Abraham Hwang ,  Nigel Chen

IPC: H04B1/707 ,  G01S19/30 ,  H04B1/7105

CPC classification number: G01S19/30 ,  G01S19/37 ,  H04B1/7105 ,  H04B2201/709763 ,  H04J13/12

Abstract: Technology to generation of linear feedback shift register based PRN spreading code sequence using a processor device in a computing system is disclosed. A system is provided for generating a GNSS code sequence in a computer system, the system comprising one or more logic circuits configured to at least: receive a plurality of waveform generation parameters; select between a short pseudo-random noise (PRN) cycle and a long PRN cycle according to at least one of the plurality of waveform generation parameters; and emulate a plurality of linear feedback shift registers (LFSR) for generating a block of PRN code chips.

公开(公告)号：US20170108588A1

公开(公告)日：2017-04-20

申请号：US14882598

申请日：2015-10-14

Applicant: The Boeing Company

Inventor： Philip L. Wei ,  Abraham Hwang ,  Nigel Chen

IPC: G01S19/30 ,  H04B1/7105

CPC classification number: G01S19/30 ,  G01S19/37 ,  H04B1/7105 ,  H04B2201/709763 ,  H04J13/12

Abstract: Technology to generation of linear feedback shift register based PRN spreading code sequence using a processor device in a computing system is disclosed. A system is provided for generating a GNSS code sequence in a computer system, the system comprising one or more logic circuits configured to at least: receive a plurality of waveform generation parameters; select between a short pseudo-random noise (PRN) cycle and a long PRN cycle according to at least one of the plurality of waveform generation parameters; and emulate a plurality of linear feedback shift registers (LFSR) for generating a block of PRN code chips.

公开(公告)号：US09014236B2

公开(公告)日：2015-04-21

申请号：US14348015

申请日：2011-09-28

Applicant: Zhixun Tang ,  Xie Li ,  Liping Zhang

Inventor： Zhixun Tang ,  Xie Li ,  Liping Zhang

IPC: H04B1/69 ,  H04B1/707 ,  H04B1/713 ,  H04B1/7105

CPC classification number: H04B1/7105 ,  H04B2201/709763

Abstract: A method for performing joint detection includes adjusting a ranking order of codes in a matched filtering result, and a ranking order of column vectors in a system submatrix according to the power. The joint detection is performed using an adjusted matched filtering result and an adjusted system submatrix, and acquires demodulated signals corresponding to the codes. The codes that have high power will be demodulated first. This ensures accuracy of demodulation, inhibits erroneous propagation effect, and improves accuracy of the joint detection.

Abstract translation: 一种用于执行联合检测的方法，包括根据功率调整匹配的滤波结果中的码的排序顺序和系统子矩阵中的列向量的排序顺序。 使用调整的匹配滤波结果和调整后的系统子矩阵进行联合检测，并且获取与代码对应的解调信号。 具有高功率的代码首先被解调。 这样可以确保解调精度，抑制错误的传播效果，提高联合检测的精度。

公开(公告)号：US20140241403A1

公开(公告)日：2014-08-28

申请号：US14348015

申请日：2011-09-28

Applicant: Zhixun Tang ,  Xie Li ,  Liping Zhang

Inventor： Zhixun Tang ,  Xie Li ,  Liping Zhang

IPC: H04B1/7105

CPC classification number: H04B1/7105 ,  H04B2201/709763

Abstract: A method for performing joint detection includes adjusting a ranking order of codes in a matched filtering result, and a ranking order of column vectors in a system submatrix according to the power. The joint detection is performed using an adjusted matched filtering result and an adjusted system submatrix, and acquires demodulated signals corresponding to the codes. The codes that have high power will be demodulated first. This ensures accuracy of demodulation, inhibits erroneous propagation effect, and improves accuracy of the joint detection.

Abstract translation: 一种用于执行联合检测的方法，包括根据功率调整匹配的滤波结果中的码的排序顺序和系统子矩阵中的列向量的排序顺序。 使用调整的匹配滤波结果和调整后的系统子矩阵进行联合检测，并且获取与代码对应的解调信号。 具有高功率的代码首先被解调。 这样可以确保解调精度，抑制错误的传播效果，提高联合检测的精度。