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1. 发明授权

US06901117B1 Soft output decoder for convolutional codes 有权
标题翻译：用于卷积码的软输出解码器
公开(公告)号：US06901117B1
公开(公告)日：2005-05-31
申请号：US09501922
申请日：2000-02-10
申请人： Brian K. Classon , Terry M. Schaffner
发明人： Brian K. Classon , Terry M. Schaffner
IPC分类号： H03M13/23 , H03M13/41 , H03M13/45 , H04D1/00
CPC分类号： H03M13/3972 , H03M13/3723 , H03M13/3905
摘要： Decoding signals represented by a trellis of block length N divided into windows of length L includes a step of decoding a forward recursion from a point P that is before the beginning of a window up to the beginning of the window. P is chosen at a sufficient distance from the beginning of the window such that forward recursion determines a known state metric at the beginning of the window. A next step includes decoding the window using forward recursion from the known state at the beginning of the window up to the end of the window to define a set of known forward recursion state metrics which are stored. A next step includes decoding using backward recursion starting from a known state at the end of the window and moving backward. A next step includes calculating a soft output at each stage of the backward recursion using the stored forward recursion state metrics, and branch metrics at each stage, and outputting the soft output for that stage in a LIFO format.
摘要翻译：将由划分成长度L的窗口的块长度N的网格表示的信号解码包括从窗口开始直到窗口开始之前的点P解码向前递归的步骤。 P选择距离窗口开始的足够的距离，使得正向递归确定窗口开始处的已知状态度量。下一个步骤包括使用从窗口的开始到窗口结束的已知状态的正向递归来解码窗口，以定义存储的一组已知的向前递归状态度量。下一步包括使用从窗口末端的已知状态开始并向后移动的反向递归解码。下一步包括使用存储的前向递归状态度量和每个阶段的分支度量来计算在逆向递归的每个阶段的软输出，并以LIFO格式输出该阶段的软输出。

2. 发明授权

US06856657B1 Soft output decoder for convolutional codes 有权
标题翻译：用于卷积码的软输出解码器
公开(公告)号：US06856657B1
公开(公告)日：2005-02-15
申请号：US09501883
申请日：2000-02-10
申请人： Brian K. Classon , Terry M. Schaffner , Vipul A. Desai
发明人： Brian K. Classon , Terry M. Schaffner , Vipul A. Desai
IPC分类号： G06F11/10 , H03M13/23 , H03M13/41 , H04D1/00
CPC分类号： H04L1/0059 , H03M13/3905 , H03M13/3972 , H04L1/005
摘要： Decoding signals represented by a trellis of block length N divided into windows of length L includes a step of decoding a forward recursion from a point P1 that is before the beginning of a window up to the beginning of the window and decoding a backward recursion from a point P2 that is after the end of a window back to the end of the window to define known states at the beginning and end of the window. A next step includes decoding the window using backward recursion from the known state at the end of the window back to the beginning of the window to define a set of backward recursion state metrics. A next step includes decoding using forward recursion starting from a known state at the beginning of the window and moving forward to the end of the window to define a set of forward recursion state metrics. A next step includes calculating a soft output at each stage of the window using the forward and backward recursion state metrics, and branch metrics at each stage, and outputting the soft output for that stage.
摘要翻译：将由划分成长度L的窗口的块长度N的网格表示的解码信号包括从窗口开始直到窗口开始之前的点P1解码正向递归的步骤，并从窗口解码向后递归点P2在窗口结束之后返回到窗口的末尾，以在窗口的开头和结尾定义已知状态。下一步骤包括使用从窗口结束处的已知状态到窗口开头的反向递归来解码窗口，以定义一组向后递归状态度量。下一步包括使用从窗口开始处的已知状态开始的前向递归进行解码，并向前移动到窗口的末尾以定义一组向前递归状态度量。下一步包括使用正向和反向递归状态量度以及每个阶段的分支度量计算窗口每一阶段的软输出，并输出该阶段的软输出。

3. 发明申请

US20120300814A1 RF CHIRP SIGNAL PROPAGATION DELAY MEASUREMENT 有权
标题翻译： RF CHIRP信号传播延迟测量
公开(公告)号：US20120300814A1
公开(公告)日：2012-11-29
申请号：US13208599
申请日：2011-08-12
申请人： Terry M. Schaffner
发明人： Terry M. Schaffner
IPC分类号： H04B1/69
CPC分类号： H04B1/69 , G01S11/04 , H04B2001/6912
摘要： Distance between two radio frequency devices is estimated by receiving a plurality of spread spectrum chirp signals frequency offset from one another, and evaluating the received plurality of spread spectrum chirp signals for relative phase shifts between the plurality of spread spectrum chirp signals. A fine propagation time is derived using the phase shifts between the spread spectrum chirp signals. A frequency domain despreading window is shifted to reduce the influence of time-delayed near multipath signals in receiving the plurality of spread spectrum chirp signals.
摘要翻译：通过接收彼此频率偏移的多个扩频线性调频脉冲信号来估计两个射频设备之间的距离，并且估计接收到的多个扩频线性调频脉冲信号以用于多个扩展频谱啁啾信号之间的相对相移。使用扩频啁啾信号之间的相移导出精细的传播时间。移位频域解扩窗口以减少在接收多个扩展频谱线性调频信号时延时近似多路径信号的影响。

4. 发明授权

US6075824A Method and apparatus for re-encoding decoded data 失效
标题翻译：用于重新编码解码数据的方法和装置
公开(公告)号：US6075824A
公开(公告)日：2000-06-13
申请号：US905455
申请日：1997-08-04
申请人： Theodore A. Trost , Terry M. Schaffner
发明人： Theodore A. Trost , Terry M. Schaffner
IPC分类号： H03M13/23 , H03K9/00 , H03M13/27
CPC分类号： H03M13/3961 , H03M13/3776
摘要： A re-encoded history data bits generator (101), in a communication system having a block of convolutionally encoded data bits that are interleaved into a matrix (200), selects, for each of the required number of re-encoded history data bits, a combination of data bits from a sequence of previously decoded data bits (410). The position of data bits in each combination is predetermined relative to the position of a data bit last shifted into in the sequence (410). The re-encoder encodes the combinations of the selected data bits thereby producing the re-encoded history data bits. The data bits of each combination are at consecutive positions in the sequence (410). The data bits of an encoded word constitute each row of the matrix (200).
摘要翻译：在具有交织到矩阵（200）中的卷积编码数据位块的通信系统中，重新编码的历史数据位发生器（101）针对每个所需数量的重新编码历史数据位选择，来自先前解码的数据比特序列（410）的数据比特的组合。每个组合中的数据位的位置相对于在序列（410）中最后移入的数据位的位置是预先确定的。重新编码器对所选数据位的组合进行编码，从而产生重新编码的历史数据位。每个组合的数据位在序列中的连续位置（410）。编码字的数据位构成矩阵的每一行（200）。

5. 发明授权

US09088349B2 System and method for transmitting and detecting spread spectrum signals 有权
标题翻译：用于发射和检测扩频信号的系统和方法
公开(公告)号：US09088349B2
公开(公告)日：2015-07-21
申请号：US11764597
申请日：2007-06-18
申请人： Terry M. Schaffner
发明人： Terry M. Schaffner
IPC分类号： H04B1/00 , H04B1/7183 , H04B1/69
CPC分类号： H04B1/7183 , H04B2001/6912
摘要： This document discusses, among other things, a system and method of detecting wideband signals of bandwidth X within a communications system having a coherency time constant of T. A synchronization signal is generated as a function of a chirp signal that sweeps a portion of bandwidth X. The synchronization signal is transmitted and received as a wideband signal at a receiver. The receiver detects the synchronization signal within the wideband signal received at the receiver by generating a detection signal, correlating the received wideband signal with the detection signal and indicating when the synchronization signal is detected within the wideband signal. The detection signal is a complex conjugate of the synchronization signal.
摘要翻译：该文件尤其涉及一种在具有T的相干性时间常数T的通信系统内检测带宽X的宽带信号的系统和方法。产生同步信号作为扫描带宽X的一部分的啁啾信号的函数同步信号作为宽带信号在接收机发送和接收。接收机通过产生检测信号来检测在接收机接收的宽带信号内的同步信号，使接收的宽带信号与检测信号相关，并指示何时在宽带信号内检测同步信号。检测信号是同步信号的复共轭。

6. 发明授权

US08976060B2 RF chirp signal propagation delay measurement 有权
标题翻译：射频啁啾信号传播延迟测量
公开(公告)号：US08976060B2
公开(公告)日：2015-03-10
申请号：US13208599
申请日：2011-08-12
申请人： Terry M. Schaffner
发明人： Terry M. Schaffner
IPC分类号： G01S13/08 , G01S13/32 , H04B1/69 , G01S11/04 , G01S13/00 , H04B1/00
CPC分类号： H04B1/69 , G01S11/04 , H04B2001/6912
摘要： Distance between two radio frequency devices is estimated by receiving a plurality of spread spectrum chirp signals frequency offset from one another, and evaluating the received plurality of spread spectrum chirp signals for relative phase shifts between the plurality of spread spectrum chirp signals. A fine propagation time is derived using the phase shifts between the spread spectrum chirp signals. A frequency domain despreading window is shifted to reduce the influence of time-delayed near multipath signals in receiving the plurality of spread spectrum chirp signals.
摘要翻译：通过接收彼此频率偏移的多个扩频线性调频脉冲信号来估计两个射频设备之间的距离，并且估计接收到的多个扩频线性调频脉冲信号以用于多个扩展频谱啁啾信号之间的相对相移。使用扩频啁啾信号之间的相移导出精细的传播时间。移位频域解扩窗口以减少在接收多个扩展频谱线性调频信号时延时近似多路径信号的影响。

7. 发明授权

US5856935A Fast hadamard transform within a code division, multiple access communication system 失效
标题翻译：一个码分多进制通信系统中的快速哈马达变换
公开(公告)号：US5856935A
公开(公告)日：1999-01-05
申请号：US646595
申请日：1996-05-08
申请人： Jeffrey H. Moy , Terry M. Schaffner
发明人： Jeffrey H. Moy , Terry M. Schaffner
IPC分类号： G06F17/14 , G06F7/36
CPC分类号： G06F17/145
摘要： In a receiver (10) of a code division multiple access system, a method of processing a received signal including reading a first and second data item from a first memory (50), at least one of the first and second data items associated with Walsh data; performing a first arithmetic operation on the first and second data items to produce a first result; performing a second arithmetic operation on the first and second data items to produce a second result; and storing the first and second result into a second memory (52) while reading a third and fourth data item from the first memory (50).
摘要翻译：在码分多址系统的接收机（10）中，处理接收到的信号的方法包括从第一存储器（50）读取第一和第二数据项，与沃尔什相关的第一和第二数据项中的至少一个数据; 对所述第一和第二数据项执行第一算术运算以产生第一结果; 对所述第一和第二数据项执行第二算术运算以产生第二结果; 以及将第一和第二结果存储在第二存储器（52）中，同时从第一存储器读取第三和第四数据项。

8. 发明授权

US5406629A Apparatus and method for digitally processing signals in a radio frequency communication system 失效
标题翻译：在射频通信系统中数字处理信号的装置和方法
公开(公告)号：US5406629A
公开(公告)日：1995-04-11
申请号：US170627
申请日：1993-12-20
申请人： Robert M. Harrison , Terry M. Schaffner
发明人： Robert M. Harrison , Terry M. Schaffner
IPC分类号： G06F17/14 , H04B1/707 , H04J11/00 , H04J13/00 , H04L27/18 , H04K1/10
CPC分类号： H04L27/18 , G06F17/141 , H04B1/707 , H04J13/0048
摘要： A plurality of input signals are processed (75) using a Hadamard transform (52) to produce a combined Walsh covered parallel sequence which is sampled in time. The time samples are commutated (76) by a switch (53) or multiplexer to form a Walsh covered serial sequence. The Walsh covered serial sequence is then quadrature phase shift keyed (77) and transmitted (79).
摘要翻译：使用Hadamard变换（52）处理多个输入信号（75），以产生在时间上采样的组合沃尔什覆盖并行序列。时间采样通过开关（53）或多路复用器（76）进行整流（76）以形成沃尔什覆盖的串行序列。沃尔什覆盖的串行序列是正交相移键控（77）并传输（79）。

9. 发明申请

US20120307871A1 RF CHIRP RECEIVER SYNCHRONIZATION 有权
标题翻译： RF CHIRP接收器同步
公开(公告)号：US20120307871A1
公开(公告)日：2012-12-06
申请号：US13209744
申请日：2011-08-15
申请人： Terry M. Schaffner
发明人： Terry M. Schaffner
IPC分类号： H04B1/00
CPC分类号： H04L27/103 , H04L27/0014 , H04L2027/0026 , H04L2027/0046 , H04L2027/0067
摘要： A radio frequency communication system includes a radio frequency transmitter having a chirp generator operable to transmit a first chirp signal, and transmit a second chirp signal that is circular shifted relative to the first chirp signal. A receiver receives the first chirp signal and the second chirp signal, such that the proportion of phase offset between the first and second chirp signals is proportional to the frequency offset of the received signals. The first and second chirp signals are despread, and the phase difference between the first and second chirp signals is used to determine a frequency offset of the received first and second chirp signals that is proportional to the phase difference between the first and second chirp signals.
摘要翻译：射频通信系统包括具有啁啾发生器的射频发射机，其可操作以发送第一啁啾信号，并发送相对于第一啁啾信号循环移位的第二啁啾信号。接收器接收第一线性调频信号和第二啁啾信号，使得第一和第二线性调频脉冲信号之间的相位偏移的比例与接收信号的频率偏移成比例。第一和第二线性调频脉冲信号被解扩展，并且第一和第二线性调频脉冲信号之间的相位差用于确定与第一和第二线性调频脉冲信号之间的相位差成比例的接收的第一和第二线性调频脉冲信号的频率偏移。

10. 发明申请

US20080310481A1 System and method for transmitting and detecting spread spectrum signals 有权
标题翻译：用于发射和检测扩频信号的系统和方法
公开(公告)号：US20080310481A1
公开(公告)日：2008-12-18
申请号：US11764597
申请日：2007-06-18
申请人： Terry M. Schaffner
发明人： Terry M. Schaffner
IPC分类号： H04B1/69
CPC分类号： H04B1/7183 , H04B2001/6912
摘要： This document discusses, among other things, a system and method of detecting wideband signals of bandwidth X within a communications system having a coherency time constant of T. A synchronization signal is generated as a function of a chirp signal that sweeps a portion of bandwidth X. The synchronization signal is transmitted and a received as a wideband signal at a receiver. The receiver detects the synchronization signal within the wideband signal received at the receiver by generating a detection signal, correlating the received wideband signal with the detection signal and indicating when the synchronization signal is detected within the wideband signal. The detection signal is a complex conjugate of the synchronization signal.
摘要翻译：该文件尤其涉及一种在具有T的相干性时间常数T的通信系统内检测带宽X的宽带信号的系统和方法。产生同步信号作为扫描带宽X的一部分的啁啾信号的函数在接收机发送同步信号并作为宽带信号接收。接收机通过产生检测信号来检测在接收机接收的宽带信号内的同步信号，使接收的宽带信号与检测信号相关，并指示何时在宽带信号内检测同步信号。检测信号是同步信号的复共轭。

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