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1. 发明授权

US4471403A Biasing and fast degaussing circuit for magnetic materials 失效
标题翻译：用于磁性材料的偏置和快速消磁电路
公开(公告)号：US4471403A
公开(公告)日：1984-09-11
申请号：US539011
申请日：1983-10-04
申请人： William B. Dress, Jr. , David R. McNeilly
发明人： William B. Dress, Jr. , David R. McNeilly
IPC分类号： H01F13/00
CPC分类号： H01F13/006
摘要： A dual-function circuit is provided which may be used to both magnetically bias and alternately, quickly degauss a magnetic device. The circuit may be magnetically coupled or directly connected electrically to a magnetic device, such as a magnetostrictive transducer, to magnetically bias the device by applying a d.c. current and alternately apply a selectively damped a.c. current to the device to degauss the device. The circuit is of particular value in many systems which use magnetostrictive transducers for ultrasonic transmission in different propagation modes over very short time periods.
摘要翻译：提供了双功能电路，其可以用于磁偏置和交替地快速消磁磁性器件。电路可以磁耦合或直接电连接到诸如磁致伸缩换能器的磁性装置，以通过施加直流电流来对装置进行磁偏置。电流并交替地施加选择性阻尼的交流电。电流到设备去消磁设备。该电路在许多系统中是特别有价值的，它们在非常短的时间段内以不同的传播模式使用磁致伸缩传感器进行超声波传输。

2. 发明授权

US07092440B1 Hybrid spread-spectrum technique for expanding channel capacity 失效
标题翻译：用于扩展通道容量的混合扩频技术
公开(公告)号：US07092440B1
公开(公告)日：2006-08-15
申请号：US09671636
申请日：2000-09-27
申请人： William B. Dress, Jr. , Stephen F. Smith , Michael R. Moore
发明人： William B. Dress, Jr. , Stephen F. Smith , Michael R. Moore
IPC分类号： H03K7/04
CPC分类号： H04J13/0022 , H04B1/692 , H04L5/026
摘要： Methods, systems and devices are described for a direct-sequence spread-spectrum communication scheme that increases the number of users by utilizing a plurality of closely spaced orthogonal carriers that produce overlapping spectra. A method includes overlapping a plurality of direct-sequence spread-spectrum signals using carrier frequencies that are orthogonally spaced relative to a bit rate. The methods, systems and devices provide advantages because they can accommodate an increase in the number of normalized users and can optimize the loading of users across multiple frequency channels.
摘要翻译：对直接序列扩频通信方案描述了方法，系统和设备，其通过利用产生重叠频谱的多个紧密间隔的正交载波来增加用户数量。一种方法包括使用相对于比特率正交间隔的载波频率重叠多个直接序列扩频信号。方法，系统和设备提供了优点，因为它们可以适应规范化用户数量的增加，并且可以优化跨多个频率信道的用户的负载。

3. 发明授权

US06621878B2 Pulse transmission receiver with higher-order time derivative pulse correlator 失效
标题翻译：具有高阶时间导数脉冲相关器的脉冲发射接收机
公开(公告)号：US06621878B2
公开(公告)日：2003-09-16
申请号：US10082569
申请日：2002-02-25
申请人： William B. Dress, Jr. , Stephen F. Smith
发明人： William B. Dress, Jr. , Stephen F. Smith
IPC分类号： H03K900
CPC分类号： H04L25/49 , H04B1/71637 , H04B1/7172 , H04B1/7174 , H04B1/719 , H04L25/03834
摘要： Systems and methods for pulse-transmission low-power communication modes are disclosed. A pulse transmission receiver includes: a higher-order time derivative pulse correlator; a demodulation decoder coupled to the higher-order time derivative pulse correlator; a clock coupled to the demodulation decoder; and a pseudorandom polynomial generator coupled to both the higher-order time derivative pulse correlator and the clock. The systems and methods significantly reduce lower-frequency emissions from pulse transmission spread-spectrum communication modes, which reduces potentially harmful interference to existing radio frequency services and users and also simultaneously permit transmission of multiple data bits by utilizing specific pulse shapes.
摘要翻译：公开了用于脉冲传输低功率通信模式的系统和方法。脉冲发送接收机包括：高阶时间微分脉冲相关器; 耦合到高阶时间导数脉冲相关器的解调解码器; 耦合到解调解码器的时钟; 以及耦合到高阶时间导数脉冲相关器和时钟的伪随机多项式发生器。这些系统和方法显着降低了脉冲传输扩频通信模式的低频发射，从而减少了对现有射频业务和用户的潜在有害干扰，并且同时允许利用特定的脉冲形状传输多个数据位。

4. 发明授权

US06625229B2 Pulse transmission transmitter including a higher order time derivate filter 失效
标题翻译：脉冲发射发射机包括较高阶导数滤波器
公开(公告)号：US06625229B2
公开(公告)日：2003-09-23
申请号：US10082773
申请日：2002-02-25
申请人： William B. Dress, Jr. , Stephen F. Smith
发明人： William B. Dress, Jr. , Stephen F. Smith
IPC分类号： H04L2704
CPC分类号： H04L25/49 , H04B1/71637 , H04B1/7172 , H04B1/7174 , H04B1/719 , H04L25/03834
摘要： Systems and methods for pulse-transmission low-power communication modes are disclosed. A pulse transmission transmitter includes: a clock; a pseudorandom polynomial generator coupled to the clock, the pseudorandom polynomial generator having a polynomial load input; an exclusive-OR gate coupled to the pseudorandom polynomial generator, the exclusive-OR gate having a serial data input; a programmable delay circuit coupled to both the clock and the exclusive-OR gate; a pulse generator coupled to the programmable delay circuit; and a higher order time derivative filter coupled to the pulse generator. The systems and methods significantly reduce lower-frequency emissions from pulse transmission spread-spectrum communication modes, which reduces potentially harmful interference to existing radio frequency services and users and also simultaneously permit transmission of multiple data bits by utilizing specific pulse shapes.
摘要翻译：公开了用于脉冲传输低功率通信模式的系统和方法。脉冲传输发射机包括：时钟; 耦合到所述时钟的伪随机多项式发生器，所述伪随机多项式发生器具有多项式负载输入; 耦合到伪随机多项式发生器的异或门，异或门具有串行数据输入; 耦合到时钟和异或门的可编程延迟电路; 耦合到所述可编程延迟电路的脉冲发生器; 以及耦合到脉冲发生器的较高阶导数滤波器。这些系统和方法显着降低了脉冲传输扩频通信模式的低频发射，从而减少了对现有射频业务和用户的潜在有害干扰，并且同时允许利用特定的脉冲形状传输多个数据位。

5. 发明授权

US06606350B2 Pulse transmission receiver with higher-order time derivative pulse generator 失效
标题翻译：脉冲发射接收机具有高阶时间微分脉冲发生器
公开(公告)号：US06606350B2
公开(公告)日：2003-08-12
申请号：US10082568
申请日：2002-02-25
申请人： William B. Dress, Jr. , Stephen F. Smith
发明人： William B. Dress, Jr. , Stephen F. Smith
IPC分类号： H04B1702
CPC分类号： H04L25/49 , H04B1/71637 , H04B1/7172 , H04B1/7174 , H04B1/719 , H04L25/03834
摘要： Systems and methods for pulse-transmission low-power communication modes are disclosed. A pulse transmission receiver includes: a front-end amplification/processing circuit; a synchronization circuit coupled to the front-end amplification/processing circuit; a clock coupled to the synchronization circuit; a trigger signal generator coupled to the clock; and at least one higher-order time derivative pulse generator coupled to the trigger signal generator. The systems and methods significantly reduce lower-frequency emissions from pulse transmission spread-spectrum communication modes, which reduces potentially harmful interference to existing radio frequency services and users and also simultaneously permit transmission of multiple data bits by utilizing specific pulse shapes.
摘要翻译：公开了用于脉冲传输低功率通信模式的系统和方法。脉冲发射接收机包括：前端放大/处理电路; 耦合到前端放大/处理电路的同步电路; 耦合到同步电路的时钟; 耦合到时钟的触发信号发生器; 以及耦合到触发信号发生器的至少一个高阶时间导数脉冲发生器。这些系统和方法显着降低了脉冲传输扩频通信模式的低频发射，从而减少了对现有射频业务和用户的潜在有害干扰，并且同时允许利用特定的脉冲形状传输多个数据位。

6. 发明授权

US06603818B1 Pulse transmission transceiver architecture for low power communications 失效
公开(公告)号：US06603818B1
公开(公告)日：2003-08-05
申请号：US09404009
申请日：1999-09-23
申请人： William B. Dress, Jr. , Stephen F. Smith
发明人： William B. Dress, Jr. , Stephen F. Smith
IPC分类号： H04L2704
CPC分类号： H04L25/49 , H04B1/71637 , H04B1/7172 , H04B1/7174 , H04B1/719 , H04L25/03834
摘要： Systems and methods for pulse-transmission low-power communication modes are disclosed. A method of pulse transmission communications includes: generating a modulated pulse signal waveform; transforming said modulated pulse signal waveform into at least one higher-order derivative waveform; and transmitting said at least one higher-order derivative waveform as an emitted pulse. The systems and methods significantly reduce lower-frequency emissions from pulse transmission spread-spectrum communication modes, which reduces potentially harmful interference to existing radio frequency services and users and also simultaneously permit transmission of multiple data bits by utilizing specific pulse shapes.

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