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1. 发明授权

US06556239B1 Distortion monitoring system for CATV transmission networks 有权
标题翻译： CATV传输网络失真监控系统
公开(公告)号：US06556239B1
公开(公告)日：2003-04-29
申请号：US09545650
申请日：2000-04-10
申请人： Saleh R. Al-Araji , Paul E. Quesenberry , Herman A. Kruse
发明人： Saleh R. Al-Araji , Paul E. Quesenberry , Herman A. Kruse
IPC分类号： H04N1700
CPC分类号： H04N17/00 , H04N7/10
摘要： Systems and methods for a distortion monitoring system that detects an abnormal amount of signal distortion occurring in a transmission system. The distortion monitoring system includes a system amplifier section for amplifying and coupling an input signal to provide first and second outputs and a distortion monitoring section for processing the second output. The amount of distortion present is represented by an output from the distortion monitoring section of the system. In one embodiment, the distortion monitoring section can include an envelope detector for receiving the second output signal, a lowpass filter coupled to the envelope detector for cutting off frequencies below the Nyquist rate, and a voltage amplifier coupled to the lowpass filter for amplifying the signal. An analog to digital converter coupled to the voltage amplifier digitizes the signal, a memory buffer coupled to the analog to digital converter captures the digital data from the analog to digital converter, and a digital signal processor extracts the converted signal. In yet another embodiment, the digital signal processor includes an on-chip memory. A status monitor coupled to the output of the distortion monitoring section provides for monitoring the output signal.
摘要翻译：用于检测在传输系统中发生的异常信号失真量的失真监视系统的系统和方法。失真监测系统包括用于放大和耦合输入信号以提供第一和第二输出的系统放大器部分和用于处理第二输出的失真监测部分。存在的失真量由系统的失真监视部分的输出表示。在一个实施例中，失真监测部分可以包括用于接收第二输出信号的包络检测器，耦合到包络检测器的低通滤波器，用于切断低于奈奎斯特速率的频率，以及耦合到低通滤波器的放大信号的电压放大器。耦合到电压放大器的模数转换器对信号进行数字化，耦合到模数转换器的存储器缓冲器捕获来自模数转换器的数字数据，并且数字信号处理器提取转换的信号。在另一个实施例中，数字信号处理器包括片上存储器。耦合到失真监视部分的输出的状态监视器提供监视输出信号。

2. 发明授权

US07095960B2 Spurious free dynamic range in optical communications systems 有权
标题翻译：光通信系统中的无杂散动态范围
公开(公告)号：US07095960B2
公开(公告)日：2006-08-22
申请号：US10213658
申请日：2002-08-06
申请人： Paul E. Quesenberry , Saleh R. Al-Araji , Edward W. Brumley, Jr.
发明人： Paul E. Quesenberry , Saleh R. Al-Araji , Edward W. Brumley, Jr.
IPC分类号： H04B10/00
CPC分类号： H04B10/504 , H04B10/2575 , H04B10/58
摘要： The present invention is directed towards an optical transmitter including a noise generator. The noise generator provides noise signals that are filtered to below a frequency spectrum. The filtered noise signals are combined with RF signals to provide continuous modulation of a laser. The combined signals are converted to optical signals by the laser and transmitted over an optical link.
摘要翻译：本发明涉及一种包括噪声发生器的光发射机。噪声发生器提供被滤波到低于频谱的噪声信号。滤波的噪声信号与RF信号组合以提供激光的连续调制。组合的信号由激光器转换成光信号并通过光链路传输。

3. 发明授权

US06559756B2 Ingress monitoring device in a broadband communications system 有权
标题翻译：宽带通信系统中的入口监控设备
公开(公告)号：US06559756B2
公开(公告)日：2003-05-06
申请号：US09880455
申请日：2001-06-13
申请人： Saleh R. Al-Araji , Paul E. Quesenberry
发明人： Saleh R. Al-Araji , Paul E. Quesenberry
IPC分类号： G08B900
CPC分类号： H04L43/00 , H04L12/2801 , H04L43/0817
摘要： An ingress monitoring device (400) for monitoring and detecting reverse signals that may include ingress signals. The ingress monitoring device (400) includes a processor (430) for resolving the reverse signals into predetermined sub-bands at a first resolution. A power computation circuit (435) computes a power level for each of the sub-bands. A threshold comparison circuit (445) then compares the power level that is indicative to the power level of the ingress signals for each of the sub-bands with a predetermined threshold value. When ingress signals are detected by the ingress monitoring device (400), an alarm signal is sent that indicates the specific communications equipment in which the ingress signals have been detected.
摘要翻译：一种用于监测和检测可能包括入口信号的反向信号的入口监视设备（400）。入口监视设备（400）包括用于以第一分辨率将反向信号解析成预定子带的处理器（430）。功率计算电路（435）计算每个子带的功率电平。阈值比较电路（445）然后将指示每个子带的入口信号的功率电平的功率电平与预定阈值进行比较。当入口监视装置（400）检测到入口信号时，发送指示已经检测到入口信号的特定通信设备的报警信号。

4. 发明授权

US06417949B1 Broadband communication system for efficiently transmitting broadband signals 有权
标题翻译：宽带通信系统，有效传输宽带信号
公开(公告)号：US06417949B1
公开(公告)日：2002-07-09
申请号：US09434267
申请日：1999-11-05
申请人： Forrest M. Farhan , Paul E. Quesenberry
发明人： Forrest M. Farhan , Paul E. Quesenberry
IPC分类号： H04B1012
CPC分类号： H04L12/2874 , H04L12/2801 , H04L2212/00
摘要： A broadband communication system (60), such as a cable television system, includes a forward path for transmitting information from headend equipment to subscribers and a reverse path for transmitting information from the subscribers to the headend equipment. The reverse path includes a transmitting station (65) that receives a first analog signal, converts the first analog signal to a first digital signal having a first number of bits, encodes the first digital signal to generate a second digital signal having a second number of bits less than the first number of bits, then optically transmits the second digital signal. A receiving station (70), also located in the reverse path, receives the second digital signal, decodes the second digital signal to generate a third digital signal having a third number of bits greater than the second number of bits, then converts the third digital signal to a second analog signal that approximates the first analog signal.
摘要翻译：诸如有线电视系统的宽带通信系统（60）包括用于从头端设备向用户发送信息的前向路径和用于从用户向头端设备发送信息的反向路径。反向路径包括接收第一模拟信号的发射台（65），将第一模拟信号转换为具有第一数位数的第一数字信号，对第一数字信号进行编码，以产生第二数字信号小于第一位数的位，然后光学地发送第二数字信号。也位于反向路径中的接收站（70）接收第二数字信号，对第二数字信号进行解码以产生具有大于第二位数的第三位数的第三数字信号，然后将第三数字信号信号到接近第一模拟信号的第二模拟信号。

5. 发明授权

US06414612B1 Enhanced bandwidth digitizer using multiple analog-to digital converters and self calibration 有权
标题翻译：增强带宽数字化仪使用多个模数转换器和自校准
公开(公告)号：US06414612B1
公开(公告)日：2002-07-02
申请号：US09661851
申请日：2000-09-14
申请人： Paul E. Quesenberry
发明人： Paul E. Quesenberry
IPC分类号： H03M106
CPC分类号： H03M1/1028 , H03M1/1215
摘要： Systems and methods for digitizing broadband signals using multiple analog-to-digital converters (ADCs) and a calibration system for adjusting the phase and bias of the sampled signal such that the output digitized, sample closely approximates the input broadband analog signal. A calibration signal is combined with the broadband signal and the combined signal is converted to digital. The combined signal splits into portions equal to the number of ADCs in the system. An off-line digital signal processor (DSP) analyzes samples representing a portion of the combined signal and computes any necessary adjustments to phase and amplitude of the digitized samples. If adjustments are required, a real-time DSP adjusts the phase and amplitude of the digitized sample, by use of a multiplier and/or adder included in the real-time DSP. The separate portions of the digitized sample are recombined by a multiplexer to create a single digitized output representing the broadband analog signal.
摘要翻译：使用多个模数转换器（ADC）数字化宽带信号的系统和方法以及用于调整采样信号的相位和偏置的校准系统，使得输出数字化样本与输入宽带模拟信号近似。校准信号与宽带信号组合，组合信号转换成数字信号。组合信号分为等于系统中ADC数量的部分。离线数字信号处理器（DSP）分析表示组合信号的一部分的样本，并计算对数字化样本的相位和幅度的任何必要的调整。如果需要调整，实时DSP通过使用实时DSP中包含的乘法器和/或加法器来调整数字化采样的相位和幅度。数字化样本的单独部分由多路复用器重新组合以产生表示宽带模拟信号的单个数字化输出。

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