公开(公告)号：US08675712B1

公开(公告)日：2014-03-18

申请号：US13080955

申请日：2011-04-06

申请人： Xiangdong Jin ,  Mao Yu ,  Jianwei Bei ,  Xiaotao Xu

发明人： Xiangdong Jin ,  Mao Yu ,  Jianwei Bei ,  Xiaotao Xu

IPC分类号： H04B1/00

CPC分类号： G01S19/254 ,  G01S19/30

摘要： In accordance with the teachings described herein, system and methods are provided for a GPS PRN code interpolation scheme with a reduced memory requirement. An example GPS receiver system may include a memory, a local PRN code generator, and an interpolator. The memory may be used to store GPS PRN code received from a global positioning satellite. The local PRN code generator generates a replica PRN code having a repeating code that includes at least a first epoch and a second epoch. The interpolator determines an offset point in the first epoch of replica PRN code and interpolates the replica PRN code at a predetermined sample rate to generate an interpolated replica PRN code for use in correlating with the GPS PRN code.

摘要翻译： 根据本文所述的教导，为具有减少的存储器要求的GPS PRN码插值方案提供了系统和方法。 示例性GPS接收机系统可以包括存储器，本地PRN码发生器和内插器。 存储器可以用于存储从全球定位卫星接收的GPS PRN码。 本地PRN代码生成器生成具有至少包括第一纪元和第二纪元的重复代码的副本PRN代码。 内插器确定复制PRN码的第一纪元中的偏移点，并以预定采样率内插副本PRN码，以产生用于与GPS PRN码相关的内插副本PRN码。

公开(公告)号：US08514129B1

公开(公告)日：2013-08-20

申请号：US13051114

申请日：2011-03-18

申请人： Chi-Yuen Young ,  Mao Yu ,  Xiangdong Jin

发明人： Chi-Yuen Young ,  Mao Yu ,  Xiangdong Jin

IPC分类号： G01S19/35

CPC分类号： G01S19/35 ,  G01S19/37

摘要： Apparatus having corresponding methods and non-transitory computer-readable media comprise: a sampler configured to sample a signal, wherein the signal is modulated with a waveform having a known period, wherein the sampler obtains K samples in each period, and wherein each of the samples is N bits long, wherein K is an integer greater than 0, and N is an integer greater than 1; a memory bank, wherein the memory bank has M columns and K rows, wherein each column is N bits wide, and wherein M is an integer greater than 0; a write controller configured to write the samples to the memory bank in column order; a read controller configured to read the samples from the memory bank in row order; and an integrator configured to integrate the samples read from the memory bank, wherein the integrator provides a respective integration result for each row.

摘要翻译： 具有相应方法和非暂时计算机可读介质的装置包括：采样器，被配置为对信号进行采样，其中所述信号用具有已知周期的波形进行调制，其中所述采样器在每个周期中获得K个采样， 样本是N位长，其中K是大于0的整数，N是大于1的整数; 存储体，其中所述存储体具有M列和K行，其中每列为N位宽，并且其中M为大于0的整数; 写入控制器，其被配置为以列的顺序将所述样本写入所述存储体; 读取控制器，其被配置为以行的顺序从存储体读取样品; 以及积分器，被配置为对从存储体读取的样本进行积分，其中积分器为每行提供相应的积分结果。

公开(公告)号：US08331494B1

公开(公告)日：2012-12-11

申请号：US12624353

申请日：2009-11-23

申请人： Mao Yu ,  Xiangdong Jin

发明人： Mao Yu ,  Xiangdong Jin

IPC分类号： H03K9/06

CPC分类号： H03H17/0664 ,  H03H2218/04

摘要： In one embodiment, an analog-to-digital converter (ADC) receives a radio frequency (RF) signal and converts the RF signal into a digital signal at an intermediate frequency. The ADC uses a sampling frequency that is a multiple of the intermediate frequency to perform the conversion. A selector receives the digital signal and outputs a combined in phase and quadrature signal at a plurality of sampling points based on the sampling frequency. A filter receives the combined in phase and quadrature signal and outputs a baseband in phase baseband signal and a baseband quadrature baseband signal.

摘要翻译： 在一个实施例中，模数转换器（ADC）接收射频（RF）信号并将RF信号转换成中频的数字信号。 ADC使用中频倍数的采样频率进行转换。 选择器接收数字信号，并且基于采样频率在多个采样点输出组合的同相和正交信号。 滤波器接收组合的同相和正交信号，并输出基带相位基带信号和基带正交基带信号。

公开(公告)号：US09071342B1

公开(公告)日：2015-06-30

申请号：US13081746

申请日：2011-04-07

申请人： Xiangdong Jin ,  Mao Yu ,  Chi-Yuen Young

发明人： Xiangdong Jin ,  Mao Yu ,  Chi-Yuen Young

IPC分类号： H04B1/709 ,  G01S19/30

CPC分类号： H04B1/709 ,  G01S19/30

摘要： In accordance with the teachings described herein, system and methods are provided for a GPS acquisition correlation scheme with a reduced memory requirement. An example system may include a memory, a local PRN code generator, correlators, adder trees, an accumulator, and an output memory. The memory may be used to store an input PRN code. The local PRN code generator generates a replica PRN code and outputs a replica PRN code. The local PRN code generator may also shift the replica PRN code for each output epoch. One or more correlators receive the input PRN code and the replica PRN code and compare a bit of the input PRN code to a bit of the replica PRN code and generates a comparison. The adder trees add the comparisons and generate a comparison output. An accumulator accumulates the comparison output and outputs an accumulated output to an output memory.

摘要翻译： 根据本文所述的教导，为具有减少的存储器需求的GPS采集相关方案提供了系统和方法。 示例系统可以包括存储器，本地PRN码发生器，相关器，加法器树，累加器和输出存储器。 存储器可以用于存储输入PRN码。 本地PRN代码生成器生成副本PRN代码并输出副本PRN代码。 本地PRN码发生器也可以移位每个输出时期的副本PRN码。 一个或多个相关器接收输入PRN码和副本PRN码，并将输入PRN码的一位与副本PRN码的位进行比较，并产生比较。 加法器树添加比较并生成比较输出。 累加器累加比较输出，并将累积的输出输出到输出存储器。

公开(公告)号：US20110096797A1

公开(公告)日：2011-04-28

申请号：US12910628

申请日：2010-10-22

申请人： Hongyuan Zhang ,  Raja Banerjea ,  Yong Liu ,  Mao Yu

发明人： Hongyuan Zhang ,  Raja Banerjea ,  Yong Liu ,  Mao Yu

IPC分类号： H04J3/24

CPC分类号： H04B7/0452 ,  H04B7/0413 ,  H04B7/0669 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/0053 ,  H04L25/0226 ,  H04W84/12

摘要： In a method for generating a preamble of a data unit for transmission via a multiple input, multiple output (MIMO) communication channel, a first field of the preamble is generated. The first field provides a plurality of indicators to a plurality of receivers. Each one of the plurality of indicators indicates a set of a plurality of training sequences that corresponds to transmission of the data unit to a corresponding one of the plurality of receivers. The plurality of training sequences is included in a second field of the preamble. The preamble is formatted such that the first field of the preamble will be transmitted prior to the second field of the preamble being transmitted.

摘要翻译： 在通过多输入多输出（MIMO）通信信道生成用于传输的数据单元的前同步码的方法中，生成前导码的第一字段。 第一场向多个接收机提供多个指示符。 多个指示符中的每个指示符指示对应于数据单元向多个接收器中的相应一个的传输的多个训练序列的集合。 多个训练序列被包括在前导码的第二个字段中。 格式化前置码使得前导码的第一字段将在正在发送的前导码的第二字段之前被发送。

公开(公告)号：US20110096796A1

公开(公告)日：2011-04-28

申请号：US12910608

申请日：2010-10-22

申请人： HONGYUAN ZHANG ,  Raja Banerjea ,  Yong Liu ,  Mao Yu

发明人： HONGYUAN ZHANG ,  Raja Banerjea ,  Yong Liu ,  Mao Yu

IPC分类号： H04J3/24

CPC分类号： H04B7/0452 ,  H04B7/0413 ,  H04B7/0669 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/0053 ,  H04L25/0226 ,  H04W84/12

摘要： In a method for generating a preamble of a data unit for transmission via a communication channel, an indication of a first number of spatial or space-time streams is included in a first field of the preamble. The first number of spatial or space-time streams corresponds to transmission of the data unit to a first receiver. One or more training sequences are included in a second field of the preamble. The preamble is formatted such that the first field of the preamble will be transmitted prior to the second field of the preamble being transmitted.

摘要翻译： 在用于生成用于经由通信信道传输的数据单元的前导码的方法中，在前导码的第一字段中包括第一数量的空间或时空流的指示。 第一数量的空间或时空流对应于数据单元向第一接收机的传输。 一个或多个训练序列被包括在前导码的第二个字段中。 格式化前置码使得前导码的第一字段将在正在发送的前导码的第二字段之前被发送。

公开(公告)号：US09655002B2

公开(公告)日：2017-05-16

申请号：US12758603

申请日：2010-04-12

申请人： Hongyuan Zhang ,  Hui-Ling Lou ,  Rohit U. Nabar ,  Sudhir Srinivasa ,  Mao Yu ,  Raja Banerjea

发明人： Hongyuan Zhang ,  Hui-Ling Lou ,  Rohit U. Nabar ,  Sudhir Srinivasa ,  Mao Yu ,  Raja Banerjea

IPC分类号： H04W80/00 ,  H04W28/06 ,  H04L1/00 ,  H04L29/06 ,  H04L27/26 ,  H04W84/12 ,  H04W99/00

CPC分类号： H04L1/0079 ,  H04L1/0072 ,  H04L1/009 ,  H04L27/2613 ,  H04L69/18 ,  H04W28/06 ,  H04W84/12 ,  H04W99/00

摘要： In a method for generating a data unit for transmission via a communication channel, wherein the data unit conforms to a first communication protocol, a preamble of the data unit is generated. The preamble includes a first field having information that indicates a duration of the data unit, the first field being formatted such that the first field is decodable by a receiver device that conforms to a second communication protocol but does not conform to the first communication protocol to determine the duration of the data unit based on the first field. Additionally, the preamble is formatted such that a portion of the preamble is decodable by a receiver device that conforms to a third communication protocol but does not conform to the first communication protocol. Also, the preamble is formatted such that a receiver device that conforms to the first communication protocol can determine that the data unit conforms to the first communication protocol. A data portion of the data unit that conforms to the first communication protocol and does not conform to either (i) the second communication protocol or (ii) the third communication protocol is generated.

公开(公告)号：US09294164B2

公开(公告)日：2016-03-22

申请号：US12910608

申请日：2010-10-22

申请人： Hongyuan Zhang ,  Raja Banerjea ,  Yong Liu ,  Mao Yu

发明人： Hongyuan Zhang ,  Raja Banerjea ,  Yong Liu ,  Mao Yu

IPC分类号： H04J3/24 ,  H04H20/71 ,  H04L27/28 ,  H04B7/04 ,  H04B7/06 ,  H04L5/00 ,  H04L25/02

CPC分类号： H04B7/0452 ,  H04B7/0413 ,  H04B7/0669 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/0053 ,  H04L25/0226 ,  H04W84/12

摘要： In a method for generating a preamble of a data unit for transmission via a communication channel, an indication of a first number of spatial or space-time streams is included in a first field of the preamble. The first number of spatial or space-time streams corresponds to transmission of the data unit to a first receiver. One or more training sequences are included in a second field of the preamble. The preamble is formatted such that the first field of the preamble will be transmitted prior to the second field of the preamble being transmitted.

摘要翻译： 在用于生成用于经由通信信道传输的数据单元的前导码的方法中，在前导码的第一字段中包括第一数量的空间或时空流的指示。 第一数量的空间或时空流对应于数据单元向第一接收机的传输。 一个或多个训练序列被包括在前导码的第二个字段中。 格式化前置码使得前导码的第一字段将在正在发送的前导码的第二字段之前被发送。

公开(公告)号：US07835465B1

公开(公告)日：2010-11-16

申请号：US12150832

申请日：2008-05-01

申请人： Yungping Hu ,  Mao Yu

发明人： Yungping Hu ,  Mao Yu

IPC分类号： H03K9/00 ,  H04L27/00

CPC分类号： H03M1/1225 ,  H04L27/38

摘要： A simplified architecture is disclosed for use in wireless receiver applications, particularly for ADC conversion of received in-phase I and quadrature Q signals. Circuit area is substantially reduced by sharing a single ADC to convert both signals, switching the ADC input alternately between the i and q signals. In an embodiment, the ADC is clocked at an increased sample rate, and the digital output signals are aligned to compensate for the phase difference resulting from the implementation of a single ADC.

摘要翻译： 公开了用于无线接收机应用的简化架构，特别是用于接收的同相I和正交Q信号的ADC转换。 通过共享单个ADC来转换两个信号，交替地在i和q信号之间切换ADC输入，从而大大减少了电路面积。 在一个实施例中，ADC以提高的采样率被计时，并且数字输出信号被对准以补偿由单个ADC的实现引起的相位差。

公开(公告)号：US06532271B1

公开(公告)日：2003-03-11

申请号：US09430372

申请日：1999-10-29

申请人： Syang-Myau Hwang ,  Lin Yang ,  Mao Yu ,  Gibong Jeong

发明人： Syang-Myau Hwang ,  Lin Yang ,  Mao Yu ,  Gibong Jeong

IPC分类号： H04L2722

CPC分类号： H04L27/2278 ,  H04L2027/0065 ,  H04L2027/0081

摘要： Method and system for carrier recovery and estimation of Doppler shift from a signal source that is moving relative to a signal receiver. A pure carrier preamble for the received signal is processed through each of two stages of a linear predictor to obtain a successively more accurate estimation of a Doppler frequency offset for the carrier. The received signal is downconverted by each stage estimation of the Doppler frequency offset, and the downconverted signal is processed through a decision feedback phase locked loop to provide a signal in which substantially all of the Doppler offset and/or phase angle are identified and removed. The system has low complexity, is fast, and is accurate to within an estimated few tens of Hertz and will work with signals having relatively low signal-to-noise ratios. The invention is useful for receipt of signals from satellites in low earth orbits (LEOs) and other non-geosynchronous orbits, and wherever a transmitter and receiver are moving relative to each other.

摘要翻译： 用于载波恢复和从相对于信号接收机移动的信号源估计多普勒频移的方法和系统。 通过线性预测器的两个级中的每一级处理接收信号的纯载波前导码，以获得载波的多普勒频偏的连续更准确的估计。 接收到的信号通过多普勒频率偏移的每个级估计进行下变频，并且通过判决反馈锁相环处理下变频信号，以提供其中基本上全部多普勒偏移和/或相位角被识别和去除的信号。 该系统的复杂度低，速度快，准确度达到几十赫兹，并且能够处理信噪比相对较低的信号。 本发明对于从低地球轨道（LEO）和其他非地球同步轨道中的卫星以及发射机和接收机相对于彼此移动的任何地方接收信号是有用的。