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公开(公告)号：US12126484B1
公开(公告)日：2024-10-22
申请号：US18199066
申请日：2023-05-18
CPC分类号： H04L27/365 , H04L5/001 , H04L27/367
摘要： A constant amplitude Radio Frequency (RF) signal is created by ordering complex information bearing symbols in the frequency domain along with their complex conjugates, and performing an inverse Fourier transform. This produces an analytic real-only transformed baseband signal. The real-only baseband signal is used to linearly vary the phase angle of a carrier wave while its amplitude remains constant. After reception, multi-path distortion is canceled. A time series of recovered phase angle is un-transformed with a FFT (fast Fourier transform) to produce I (in-phase) and Q (quadrature) samples. Demodulation occurs in a receiver by recovering carrier's phase angle vs. time. Forward error correction may be applied to data if desired. This may be called PM-OFDM (Phase Modulated-orthogonal frequency division multiplexing). This modulation method produces a relatively high amplitude Continuous Wave (CW) component to assist demodulation, and subcarriers near the CW can be zeroed-out to improve the CW recovery and tracking of frequency error and phase noise. The PM-OFDM signal can also be linearly precoded, creating PM-LP-OFDM. PM-LP-OFDM has a characteristic of a lower phase angle crest factor, enabling a lower peak phase rotation. Outer frequency subcarriers can be nulled to reduce occupied bandwidth, or to allow simultaneous reception of multi-user transmissions by a receiver. This can be called PM-LP-OFMDA (phase modulated-linear precoded-orthogonal frequency division multiple access).
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2.发明申请System and method for modulated signal generation method using two equal, constant-amplitude, adjustable-phase carrier waves 审中-公开使用两个相等，恒幅，可调相位载波的调制信号生成方法的系统和方法公开(公告)号：US20070286308A1
公开(公告)日：2007-12-13
申请号：US11451122
申请日：2006-06-12
IPC分类号： H04L27/12
CPC分类号： H04L27/366 , H03C1/50 , H03C5/00 , H04L27/365
摘要： This invention describes a system and a method to generate a modulated signal of an arbitrary angle and magnitude using two equal constant-amplitude carrier waves, each with adjustable-phase angles. The modulated signal is vector sum is created by combining the first carrier wave with the second carrier wave, where the phase angles of the first and second carrier waves determines both the magnitude and the phase of the desired modulated signal The necessary phase angle adjustment of the first and the second carrier waves can be achieved by rapidly reprogramming numerically controlled oscillators (NCOs), which are also known as direct digital synthesis (DDS) signal generators. This technique eliminates the inefficiency of conventional linear amplifiers and allows a single transmitter to efficiently generate signals with multiple modulation types. This technique also eliminates conventional modulators, which convert baseband signals into radio frequency signals. The generated signal may be transmitted, or utilized locally in test equipment, or for driving devices such as lasers, or for recording.
摘要翻译： 本发明描述了使用两个相等的恒幅载波来产生任意角度和幅度的调制信号的系统和方法，每个具有可调相位角。 调制信号是通过组合第一载波和第二载波而产生的矢量和，其中第一和第二载波的相位角确定期望的调制信号的幅度和相位。所需的相位角调整 可以通过快速重新编程数控振荡器（NCO）来实现第一和第二载波，这些振荡器也称为直接数字合成（DDS）信号发生器。 这种技术消除了传统线性放大器的低效率，并允许单个发射机有效地生成具有多种调制类型的信号。 该技术还消除了将基带信号转换成射频信号的常规调制器。 生成的信号可以在测试设备中本地传输或使用，或用于驱动诸如激光器的设备或用于记录。
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公开(公告)号：US20230339273A1
公开(公告)日：2023-10-26
申请号：US17728591
申请日：2022-04-25
IPC分类号： B60F1/04
CPC分类号： B60F1/04 , B60F2301/10 , B60F2301/04
摘要： A railroad switch (in USA), turnout, or [set of] points (Europe) is a mechanical installation enabling railway trains to be guided from one track to another, such as at a railway junction or where a spur or siding branches off. This invention describes a rail transportation system that allows vehicles to change tracks at railroad switch locations while all supporting and guiding rails remain static. Vehicles have diverters that apply lateral force to direct the vehicle to go onto the desired track, right, left, or straight ahead. This is enabled by the diverters plus rail wheels that have inside flanges and wide cylindrical surfaces. This innovation allows rail vehicles to travel through a connected rail system like a highway system that is transporting trucks, buses, and cars on paved roads. This system may operate under a computerized traffic control system and allows mass transit systems to respond to ride requests, enabling 24-hour route-adaptive mass transit. The track system can be placed into a road, like tram (or street cars) tracks. Vehicle can form into coupled trains while moving, and passengers can change routes in transit by changing coupled cars. Rail switches can be static for self-switching vehicles, but normally static components can adapt to accommodate conventional rail-switched rail vehicles.
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公开(公告)号：US20210153496A1
公开(公告)日：2021-05-27
申请号：US16695628
申请日：2019-11-26
IPC分类号： A01M21/04
摘要： A week killing device where weeds or other undesirable vegetation are killed by radio frequency (RF) energy applied directly to the weed by a probe inserted into or near the weed. The probe is comprised of a center pin, which is electrically hot, surrounded by periphery pins which are grounded. A reflection measuring circuit makes an impedance measurement of the probe in the ground and a matching circuit is adjusted to make an impedance match. Next a RF generator applies RF energy through the matching circuit into the probe. Energy delivery is monitored to insure weed kill by thermal heating. The probe can be manually applied by a person or applied by an autonomous vehicle using computer vision (CV) and artificial intelligence (AI) to identify weeds and avoid row crops. The weed killing device may apply power to the above-ground portion a of a weed with the root providing a ground return. The weed killing device may be towed and apply RF energy when a weed is detected by the impedance measurement circuit.
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公开(公告)号：US20080319689A1
公开(公告)日：2008-12-25
申请号：US12217547
申请日：2008-07-07
IPC分类号： G01R31/00
CPC分类号： H04N17/00
摘要： A system and method to range a distance to a source of CPD on a two-way cable system, comprises a fixed CW signal injected into a downstream signal path, a swept signal transmitted from a network analyzer, a mixer for generating an up-converted swept signal, and a source of CPD in the two-way cable system that mixes the fixed CW signal and the swept signal to create an upstream swept signal. The network analyzer receives the upstream swept signal and determines a complex frequency response created by the source of CPD. An impulse response is determined from the complex frequency response, and the distance to the source of CPD is determined from the impulse response.
摘要翻译： 一种在双向电缆系统上距离到CPD源的距离的系统和方法包括注入下行信号路径的固定CW信号，从网络分析仪发送的扫频信号，用于产生上转换的混频器 扫频信号和双向电缆系统中的CPD源，其将固定的CW信号和扫频信号混合以产生上行扫频信号。 网络分析仪接收上行扫描信号，并确定由CPD源产生的复杂频率响应。 从复频率响应确定脉冲响应，并且从脉冲响应确定到CPD源的距离。
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公开(公告)号：US11230813B1
公开(公告)日：2022-01-25
申请号：US17072664
申请日：2020-10-16
摘要： A track system for transporting people and goods with two support rails plus a side stabilizer mechanism associated with one or both rails. The side stabilizer is employed to provide lateral stability and keep a vehicle's rail wheels on the support rails. The side stabilizer may be a protruding bar or a recessed groove. This track system enables vehicles to change support rails at a junction with stationary non-switching rails. Rail wheels roll over the support rails and support the weight of the vehicle while on the rails. Interior side rollers contact the interior of the bar side stabilizer and maintain the vehicle's rail wheels centered over the support rails. Exterior side rollers contact an exterior of one of the bar side stabilizers and forces the vehicle to stay on the current track or to change to a different track. Recessed grooves and dual-flange wheels can alternately provide side stabilization. At track junctions the vehicle can change direction, pass other vehicles, change lanes, turn-around, and load or unloading passengers or freight. This track system may be integrated with a conventional road system or with a controlled-access (autobahn/interstate) highway system. Optional road wheels allow the vehicle to exit the track system and travel on conventional roads, or dual-mode road/rail wheels can be used for travel on both track and pavement. An automatic traffic control system controls traffic on the track system and enables self-driving vehicles. Powering for the vehicles can be provided by the track system. The system can be miniaturized and used for the model/toy market.
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公开(公告)号：US11364940B1
公开(公告)日：2022-06-21
申请号：US17460188
申请日：2021-08-28
IPC分类号： B61F13/00
摘要： A railroad switch (in USA), turnout, or [set of] points (Europe) is a mechanical installation enabling railway trains to be guided from one track to another, such as at a railway junction or where a spur or siding branches off. This invention describes a rail transportation system that allows vehicles to change tracks at railroad switch locations while all supporting and guiding rails remain static. Vehicles have diverters that apply lateral force to direct the vehicle to go onto the desired track, right, left, or straight ahead. This is enabled by the diverters plus rail wheels that have inside flanges and wide cylindrical surfaces. This innovation allows rail vehicles to travel through a connected rail system like a highway system that is transporting trucks, buses, and cars on paved roads. This system may operate under a computerized traffic control system and allows mass transit systems to respond to ride requests, enabling 24-hour route-adaptive mass transit. The track system can be placed into a road, like tram (or street cars) tracks. Vehicle can form into coupled trains while moving, and passengers can change routes in transit by changing coupled cars. Rail switches can be static for self-switching vehicles, but normally static components can adapt to accommodate conventional rail-switched rail vehicles.
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公开(公告)号：US20210237526A1
公开(公告)日：2021-08-05
申请号：US16780015
申请日：2020-02-03
IPC分类号： B60F1/04
摘要： Described is a multi-mode transportation system with roads and monorails, and vehicles that can transform to travel on either roads, or monorails, or on both simultaneously. Vehicles move in mode 1 on the roads using road wheels that roll over pavement. Vehicles in mode 2 move on the monorails and are supported by rail wheels in contact with a top of a monorail. In mode 2, the vehicle is supported by side cylinders that stabilize the vehicle on the monorail. Vehicles move in mode 3 with support from both roads and monorails simultaneously. Monorail mount locations simplify the vehicle's transition between modes. Pivoting or other mechanisms for road wheels, rail wheels, or side cylinders facilitate vehicle design. The vehicle can optionally be connected to the Internet, and be part of a traffic control system or operate autonomously. Small scale models or computer models of these vehicle can be used as toys, for product development, prototyping, animation, competitive games, entertainment, or for education.
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公开(公告)号：US07788050B2
公开(公告)日：2010-08-31
申请号：US12217547
申请日：2008-07-07
IPC分类号： G01R31/00
CPC分类号： H04N17/00
摘要： A system and method to range a distance to a source of CPD on a two-way cable system, comprises a fixed CW signal injected into a downstream signal path, a swept signal transmitted from a network analyzer, a mixer for generating an up-converted swept signal, and a source of CPD in the two-way cable system that mixes the fixed CW signal and the swept signal to create an upstream swept signal. The network analyzer receives the upstream swept signal and determines a complex frequency response created by the source of CPD. An impulse response is determined from the complex frequency response, and the distance to the source of CPD is determined from the impulse response.
摘要翻译： 一种在双向电缆系统上距离到CPD源的距离的系统和方法包括注入下行信号路径的固定CW信号，从网络分析仪发送的扫频信号，用于产生上转换的混频器 扫频信号和双向电缆系统中的CPD源，其将固定的CW信号和扫频信号混合以产生上行扫频信号。 网络分析仪接收上行扫描信号，并确定由CPD源产生的复杂频率响应。 从复频率响应确定脉冲响应，并且从脉冲响应确定到CPD源的距离。
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10.发明授权Power line induction of sheath test current to discover defective coaxial cable 有权电源线感应护套测试电流，发现有缺陷的同轴电缆公开(公告)号：US07489137B2
公开(公告)日：2009-02-10
申请号：US11104941
申请日：2005-04-13
CPC分类号： G01R31/021
摘要： A method to discover defective coaxial shielding in cable lines in a building by inducing a test current into the nearby alternating current (AC) power lines (also known as “mains” in the United Kingdom) and measuring a resulting induced test signal inside the coaxial cable lines. A test signal current driven onto the power lines from a wall socket will propagate back to the main electrical box in the building. The main electrical box is normally connected to a ground, such as water pipes or a ground rod driven into the earth. Some of the test signal will be transferred to the outside of the coaxial cable in the building by radiation, conduction or induction. If the coaxial cable has perfect shield integrity, none of the test signal will be induced into the center conductor of the coaxial cable. However, if the coaxial cable has poor shielding integrity or a shield break, some portion of the test current will be transferred into the inside of the cable, potentially causing interference with cable signals. A broadband test signal can be intentionally driven onto the building's power lines and measured at a convenient location in the building's coaxial cable, such as at the tap, the ground block, or inside the house. Optionally, the test signal can propagate back to the headend where it can be observed and measured. A display from the headend, such as spectrogram showing the test signal's interference, can be relayed back to the field where the test result can be viewed by a technician. Methods are disclosed to reduce interference of the test signal with upstream data signals.
摘要翻译： 通过将测试电流引入附近的交流（AC）电力线（在英国也称为“主电源”）并测量在同轴电缆内产生的诱导测试信号，来发现建筑物中电缆线路中的有缺陷的同轴屏蔽的方法 电缆线。 从墙壁插座驱动到电源线上的测试信号电流将传播回建筑物中的主电气箱。 主电气箱通常连接到地面，如水管或驱动进入地球的接地棒。 一些测试信号将通过辐射，传导或感应传输到建筑物中同轴电缆的外部。 如果同轴电缆具有完美的屏蔽完整性，则不会将任何测试信号感应到同轴电缆的中心导体。 然而，如果同轴电缆具有较差的屏蔽完整性或屏蔽断裂，则测试电流的一部分将被传送到电缆的内部，从而可能导致电缆信号的干扰。 宽带测试信号可以有意地被驱动到建筑物的电力线上，并且在建筑物的同轴电缆中的便利位置（例如在水龙头，地面块或房屋内）测量。 可选地，测试信号可以传播回到可以被观察和测量的头端。 来自头端的显示器（例如显示测试信号的干扰的光谱图）可以被中继回到技术人员可以看到测试结果的领域。 公开了减少测试信号与上行数据信号的干扰的方法。
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