公开(公告)号：US5828333A

公开(公告)日：1998-10-27

申请号：US774931

申请日：1997-01-21

申请人： David Livingstone Richardson ,  Beverly Jean Timm ,  Mark Douglas Hischke ,  Kenneth Alan Gustafson ,  Roger Brunner Williams ,  Stuart J. Collar

发明人： David Livingstone Richardson ,  Beverly Jean Timm ,  Mark Douglas Hischke ,  Kenneth Alan Gustafson ,  Roger Brunner Williams ,  Stuart J. Collar

IPC分类号： G01S13/28 ,  G01S13/02 ,  G01S13/32 ,  G01S13/34 ,  G01S13/93

CPC分类号： G01S7/023 ,  G01S13/325 ,  G01S13/348 ,  G01S13/931

摘要： A continuous wave diplex Doppler radar, comprising an oscillator generating a transmit signal having a spectrum at a carrier frequency, the oscillator having a frequency control input, and spread spectrum modulation means coupled to the frequency control input for spreading the spectrum of the transmit signal.

摘要翻译： 一种连续波多普勒多普勒雷达，包括产生具有载波频谱的发射信号的振荡器，所述振荡器具有频率控制输入，以及耦合到所述频率控制输入的扩频调制装置，用于扩展所述发射信号的频谱。

公开(公告)号：US6052421A

公开(公告)日：2000-04-18

申请号：US161921

申请日：1998-09-28

申请人： David Livingstone Richardson ,  Mark Douglas Hischke ,  Gregory Paul Richardson

发明人： David Livingstone Richardson ,  Mark Douglas Hischke ,  Gregory Paul Richardson

IPC分类号： G01S7/36 ,  G01S7/03 ,  G01S7/288 ,  G01S13/52 ,  H04B1/10 ,  H04B1/12 ,  H03D1/04 ,  G01S13/00 ,  G06F15/00 ,  H04M1/00

CPC分类号： H04B1/126 ,  G01S7/038 ,  G01S13/52 ,  G01S2007/2883

摘要： A method for separating a desired signal from an interfering signal, which is particularly useful when the desired signal is substantially weaker than the interfering signal, includes the steps of providing a combined signal which contains both a desired signal and an interfering signal; performing a Fourier transform upon the combined signal; providing a reference function which is a function of the amplitude, frequency and phase of the interfering signal; performing a Fourier transform upon the referenced function; multiplying the real components of the Fourier transform of the combined signal by the real components of the Fourier transform of the reference signal to form a product; and subtracting the product from the Fourier transform of the combined signal to form transformed data less interference, i.e., the desired signal.

摘要翻译： 一种用于将期望信号与干扰信号分离的方法，当期望信号基本上弱于干扰信号时，这特别有用，包​​括提供包含期望信号和干扰信号的组合信号的步骤; 对组合信号执行傅里叶变换; 提供作为干扰信号的幅度，频率和相位的函数的参考函数; 对所引用的函数执行傅里叶变换; 将组合信号的傅立叶变换的实数分量乘以参考信号的傅里叶变换的实数分量，以形成乘积; 以及从组合信号的傅立叶变换中减去乘积以形成变换数据较小干扰，即期望信号。

公开(公告)号：US06246729B1

公开(公告)日：2001-06-12

申请号：US09149340

申请日：1998-09-08

申请人： David Livingstone Richardson

发明人： David Livingstone Richardson

IPC分类号： H03D300

CPC分类号： H04L27/22

摘要： A method and apparatus for decoding a phase encoded data signal utilizes windowed data which is transformed into real and imaginary frequency components thereof. The real and imaginary frequency components are converted into phase and magnitude information. The magnitude information is used to calculate a threshold based upon a signal-to-noise ratio, and the phase of the data signal is corrected by identifying and sorting magnitude peaks. The data signal is differentially demodulated and the demodulated data is then multiplied by a correlation sequence so as to facilitate its being converted into a binary number.

摘要翻译： 用于对相位编码数据信号进行解码的方法和装置利用被转换成其实数和虚数分量的加窗数据。 实部和虚拟频率分量被转换为相位和幅度信息。 幅度信息用于基于信噪比来计算阈值，并且通过识别和排序幅度峰值来校正数据信号的相位。 数据信号被差分解调，然后将解调的数据乘以相关序列，以便于将其转换成二进制数。

公开(公告)号：US06313620B1

公开(公告)日：2001-11-06

申请号：US08528130

申请日：1995-09-14

申请人： David Livingstone Richardson ,  Kenneth Duane Gorham

发明人： David Livingstone Richardson ,  Kenneth Duane Gorham

IPC分类号： G01R2316

CPC分类号： G01R23/04

摘要： A method, and apparatus for accomplishing the method, for determining the frequency of an RF signal that operates by sequentially applying a received RF signal to sequentially selected individual filters having predetermined frequency pass bands and comparing the magnitudes of the filtered and unfiltered RF signals. The frequency of the RF signal is determined as being within the predetermined frequency pass band of a filter that outputs a largest magnitude output signal relative to the magnitude of the RF signal. Signals of insufficient magnitude are not processed by the system.

摘要翻译： 一种用于完成该方法的方法和装置，用于通过将接收到的RF信号顺序地施加到具有预定频带的顺序选择的各个滤波器并且比较滤波和未滤波的RF信号的幅度来确定RF信号的频率。 RF信号的频率被确定为在相对于RF信号的大小输出最大幅度输出信号的滤波器的预定频带内。 信号不足的信号不由系统处理。

公开(公告)号：US06297734B1

公开(公告)日：2001-10-02

申请号：US09401248

申请日：1999-09-23

申请人： David Livingstone Richardson ,  Gabor Elek

发明人： David Livingstone Richardson ,  Gabor Elek

IPC分类号： G08B108

CPC分类号： G06K19/0717 ,  G06K7/0008 ,  G06K7/10029 ,  G08B13/1427 ,  G08B13/2417 ,  G08B13/2462 ,  G08B13/2482 ,  G08B13/2488 ,  G08B21/0227 ,  G08B25/007 ,  G08B25/10

摘要： The present invention discloses an apparatus for randomizing the transmit time in a tag RFID communication system. The CRC calculation is implemented through the use of software stored in the system microprocessor and the calculations vary upon a plurality of dynamic inputs including temperature and motion of the tag. The tag apparatus of the present invention includes temperature and motion monitors for monitoring the environmental conditions of the tag. A microprocessor in communication with the sensor calculates the next pseudo-random transmission based upon the dynamic inputs. A transmitter transmits a signal to the system monitor.

摘要翻译： 本发明公开了一种用于在标签RFID通信系统中随机化发送时间的装置。 CRC计算通过使用存储在系统微处理器中的软件来实现，并且计算根据多个动态输入而变化，包括标签的温度和运动。 本发明的标签装置包括用于监视标签的环境条件的温度和运动监视器。 与传感器通信的微处理器基于动态输入计算下一个伪随机传输。 发射机向系统监视器发送信号。