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1.发明授权Modem method and device for indicating received signal strength and presence for intensity modulated binary-coded wireless data packets with reduced recovery time 失效用于指示接收信号强度的调制解调器方法和设备以及具有减少的恢复时间的强度调制的二进制编码的无线数据分组的存在
公开(公告)号：US5923454A
公开(公告)日：1999-07-13
申请号：US729223
申请日：1996-10-09
CPC分类号： H04L27/04 , H04B17/318
摘要： The present invention provides a modem (100), method (300) and device (103) for indicating received signal strength and presence for intensity modulated binary-coded data packets with reduced recovery time in a packet data receiving system. The device includes a receiver for binary coded wireless data packets having a first band-pass processing unit, for receiving modulated electromagnetic signals and converting the modulated electromagnetic signals to binary data signals and a second band-pass processing unit, coupled to the receiver, for providing a logarithmic received signal strength indicator signal, RSSI, using a low-frequency cutoff f.sub.L2 greater than a low-frequency cutoff f.sub.L1 of the first band-pass processing unit.
摘要翻译： 本发明提供一种调制解调器（100），方法（300）和装置（103），用于在分组数据接收系统中指示具有减少的恢复时间的强度调制二进制编码数据分组的接收信号强度和存在。 该装置包括：具有第一带通处理单元的二进制编码无线数据分组的接收机，用于接收调制的电磁信号并将调制的电磁信号转换为二进制数据信号;以及耦合到接收机的第二带通处理单元，用于 使用大于第一带通处理单元的低频截止频率fL1的低频截止频率fL2，提供对数接收信号强度指示信号RSSI。
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公开(公告)号：US5355242A
公开(公告)日：1994-10-11
申请号：US42909
申请日：1993-04-05
IPC分类号： H04B10/114 , H04B10/06
CPC分类号： H04B10/114
摘要： A wireless binary coded optical data receiver receives the binary encoded data via a photodiode. The binary encoded data is then supplied to the primary winding of a transformer and thus coupled to the secondary winding of the transformer. The secondary winding is coupled to a transimpedance amplifier wherein the transimpedance amplifier buffers the received binary encoded data. The buffered binary encoded data is then amplitude limited by a limiting circuit.
摘要翻译： 无线二进制编码光数据接收器通过光电二极管接收二进制编码数据。 然后将二进制编码数据提供给变压器的初级绕组，从而耦合到变压器的次级绕组。 次级绕组耦合到跨阻抗放大器，其中跨阻抗放大器缓冲接收的二进制编码数据。 缓冲二进制编码数据然后由限制电路进行幅度限制。
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公开(公告)号：US5490175A
公开(公告)日：1996-02-06
申请号：US42910
申请日：1993-04-05
IPC分类号： H04L25/06
CPC分类号： H04L25/068
摘要： Binary encoded data may be detected in a stream of data, by first detecting data transitions. From the detected data transitions, a first pulse is generated when successive data transitions are detected within a predetermined period of time and a second pulse is generated when successive data transitions are not detected within the predetermined period of time. The first and second pulses have the same duration but the amplitude of the first pulses is half of the amplitude of the second pulses. The first and second pulses are filtered by a bandpass filter and compared with a predetermined threshold. When the filtered pulses are above the predetermined threshold, the received stream of data is binary encoded data. When the filtered pulses are below the predetermined threshold, the received stream of data is not binary encoded data.
摘要翻译： 可以通过首先检测数据转换来在数据流中检测二进制编码数据。 从检测到的数据转换中，当在预定时间段内检测到连续数据转换时产生第一脉冲，并且在预定时间段内没有检测到连续数据转换时产生第二脉冲。 第一和第二脉冲具有相同的持续时间，但是第一脉冲的幅度是第二脉冲幅度的一半。 第一和第二脉冲被带通滤波器滤波并与预定阈值进行比较。 当滤波的脉冲高于预定阈值时，所接收的数据流是二进制编码数据。 当滤波的脉冲低于预定阈值时，所接收的数据流不是二进制编码数据。
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4.发明授权Efficient encoding and detection method and device for binary intensity modulated optical data signals 失效用于二进制强度调制光数据信号的高效编码和检测方法及装置
公开(公告)号：US6118567A
公开(公告)日：2000-09-12
申请号：US940905
申请日：1997-09-30
CPC分类号： H04L25/4902 , H04L27/06
摘要： A waveform encoding method and device provide for generating/receiving a power efficient binary intensity modulated optical data signal from a binary source signal which minimizes a time between adjacent pulse transitions and maximizes a pulse peak amplitude for transmission over a low-power wireless infrared link. In generating the signal, the method includes: generating a Q-ary pulse position modulation, Q-PPM, encoded data signal from binary data where Q represents 2.sup.L time slots and L is a predetermined integer representing a predetermined number of binary source bits of the power efficient binary intensity modulated optical data signal; generating an efficient binary intensity modulated signal by increasing the pulse peak amplitude of the Q-PPM encoded data signal by a factor of k, k a predetermined value, and decreasing a pulse width of the Q-PPM encoded data signal by k; and transmitting the efficient binary intensity modulated signal over the low-power wireless infrared link.
摘要翻译： 波形编码方法和装置提供从二进制源信号产生/接收功率有效的二进制强度调制的光数据信号，其使相邻脉冲转变之间的时间最小化并且最大化用于在低功率无线红外线链路上传输的脉冲峰值幅度。 在产生该信号时，该方法包括：从二进制数据产生Q-ary脉冲位置调制Q-PPM，其中Q表示2L时隙，L是表示预定数量的二进制源位的预定整数 功率有效的二进制强度调制光数据信号; 通过将Q-PPM编码数据信号的脉冲峰值幅度增加k个k个预定值，并且将Q-PPM编码数据信号的脉冲宽度减小k来产生有效的二进制强度调制信号; 并通过低功率无线红外线链路传输有效的二进制强度调制信号。
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5.发明授权Method, device, wireless transceiver and computer for providing collision detection in wireless carrier sense multiple access systems 失效用于在无线载波侦听多路访问系统中提供冲突检测的方法，设备，无线收发器和计算机
公开(公告)号：US5940400A
公开(公告)日：1999-08-17
申请号：US743685
申请日：1996-11-06
IPC分类号： H04B1/10 , H04L12/28 , H04L12/413
CPC分类号： H04L12/40032 , H04L12/413 , H04W74/0858
摘要： A method (600), device, wireless transceiver, computer and personal digital assistant (300, 400) provide collision presence detection in wireless intensity-modulated binary-coded data transceivers which is compatible with the collision detection employed in IEEE standard 10BASE-T Ethernet. A measurement of the degree of correlation which exists between the signal transmitted and the signal received provides a basis for efficient collision detection in CSMA systems.
摘要翻译： 一种方法（600），设备，无线收发器，计算机和个人数字助理（300,400）在无线强度调制二进制编码数据收发器中提供冲突存在检测，其与IEEE标准10BASE-T以太网中采用的冲突检测兼容 。 存在于所发送的信号和所接收的信号之间的相关程度的测量为CSMA系统中的有效冲突检测提供了依据。
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6.发明授权Method, transceiver, and system for providing wireless communication compatible with 10BASE-T Ethernet 失效用于提供与10BASE-T以太网兼容的无线通信的方法，收发器和系统
公开(公告)号：US5636213A
公开(公告)日：1997-06-03
申请号：US365615
申请日：1994-12-28
IPC分类号： H04L12/28 , H04L12/413 , H04L12/56 , H04J3/02
CPC分类号： H04W92/02 , H04L12/413 , H04L49/351 , H04W74/0808 , H04W88/16
摘要： The present invention provides a method (200), transceiver (100), and system (900) for providing wireless communication compatible with 10BASE-T Ethernet. In the transceiver, an absence detector receives a transmitted signal, determines an absence of the transmitted signal, and passes the absence to an activity detector in order to differentiate between a reflected signal and a received signal in a half duplex system. The activity detector receives the received signal and determines an operation time signal in which the received signal is absent.
摘要翻译： 本发明提供了一种用于提供与10BASE-T以太网兼容的无线通信的方法（200），收发器（100）和系统（900）。 在收发器中，不存在检测器接收发射信号，确定发射信号的不存在，并将不存在传递到活动检测器，以便在半双工系统中区分反射信号和接收信号。 活动检测器接收接收的信号并确定其中不存在接收信号的操作时间信号。
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7.发明授权Method, apparatus, and communication device for charging a charge storage device which is momentarily connected to a fixed load 失效用于对暂时连接到固定负载的电荷存储装置进行充电的方法，装置和通信装置
公开(公告)号：US5617008A
公开(公告)日：1997-04-01
申请号：US492552
申请日：1995-06-20
摘要： The present invention provides a method (100), an apparatus (400), and a communication device (700) for automatically maintaining a state of full charge in a charge storage device, such as a secondary battery (414), to which a fixed load (412) is momentarily connected. Since the load is fixed, a predetermined amount of charge is removed from the charge storage device each time the load is connected. A counter (404) is incremented while the load (412) is connected. From the count, the amount of charge that must be replaced can be determined. As the charge is replaced the count is decremented.
摘要翻译： 本发明提供一种用于在诸如二次电池（414）的电荷存储装置中自动保持充满电状态的方法（100），装置（400）和通信装置（700），固定 负载（412）短暂连接。 由于负载是固定的，所以每当连接负载时，从电荷存储装置去除预定量的电荷。 当负载（412）被连接时，计数器（404）递增。 从计数中可以确定必须更换的费用。 随着费用被更换，计数减少。
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8.发明授权FM communication system with improved response to rayleigh-faded received signals 失效FM通信系统，对Rayleigh-faded接收信号的响应改善
公开(公告)号：US4893349A
公开(公告)日：1990-01-09
申请号：US91160
申请日：1987-08-28
申请人： Bruce C. Eastmond , Wai Elliott Lum
发明人： Bruce C. Eastmond , Wai Elliott Lum
CPC分类号： H03G3/3052 , H03G3/344 , H03G3/345 , H04B1/1027 , H04H20/67
摘要： An improved FM communication system is disclosed in which noise bursts and pops in the audio output of the receiver, due to weak and Rayleigh-faded signals, are minimized by selectively attenuating the audio signal in the receiver. The amount and rate of attenuation for the receiver noise reduction circuits is determined by a control signal derived form either the average discriminator noise at frequencies above 3 kHz, or from a received RF signal strength indicator, or a combination of both. The audio output is attenuated during weak signals or Rayleigh fades only when the attenuation control signal increases above a predetermined signal-to-noise ratio threshold. Also described are further improvements to noise attenuation devices used in combination with the receiver noise reduction circuits to enhance audio quality in particular applications, e.g., FM repeater systems which may incorporate multiple transmitters in a simulcast configuration.
摘要翻译： 公开了一种改进的FM通信系统，其中由于弱和瑞利衰落的信号，接收机的音频输出中的噪声突发和流淌通过选择性地衰减接收机中的音频信号来最小化。 接收机噪声降低电路的衰减量和速率由通过频率高于3kHz的平均鉴别器噪声或接收到的RF信号强度指示符或两者的组合导出的控制信号确定。 只有当衰减控制信号增加到高于预定的信噪比阈值时，音频输出在弱信号或瑞利衰减期间被衰减。 还描述了与接收机噪声降低电路组合使用的噪声衰减装置的进一步改进，以增强特定应用中的音频质量，例如可以以同步播放配置并入多个发射机的FM中继器系统。
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公开(公告)号：US4541118A
公开(公告)日：1985-09-10
申请号：US564815
申请日：1983-12-22
CPC分类号： H04W88/188 , H04B1/68 , H04B14/006
摘要： A single sideband communications system conveying a message through a transmitter to one or more predetermined receivers which are enabled by a coded squelch signal unique to the predetermined receivers is disclosed. The transmitter comprises means to angle modulate both the pilot signal and the information bearing single sideband signal with the coded signal at a predetermined deviation and to transmit the resulting signal.Each receiver frequency control means tracks the frequency excursions of a selected portion of the transmitted signal up to predetermined limits so that the message can be demodulated without frequency distortion being introduced. Each receiver demodulates the coded squelch without interfering with the message demodulation or tracking functions and activates the receiver squelch of those preselected receivers.
摘要翻译： 公开了一种通过发射机将消息传送到由预定接收机唯一的编码静噪信号启用的一个或多个预定接收机的单边带通信系统。 发射机包括用导频信号和信息承载单边带信号与预定偏差的编码信号进行角度调制并传输结果信号的装置。 每个接收机频率控制装置跟踪发送信号的选定部分的频率偏移达到预定的限制，使得消息可被解调而不引入频率失真。 每个接收机解调编码的静噪，而不干扰消息解调或跟踪功能，并激活那些预选接收机的接收机静噪。
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公开(公告)号：US4596046A
公开(公告)日：1986-06-17
申请号：US656551
申请日：1984-10-01
CPC分类号： H03J7/02
摘要： An automatic frequency control circuit for a single side band receiver employing a split-loop phase locked loop system is disclosed. Initially, both a first and second voltage controlled oscillator lock to a received pilot taken after the IF strip of the SSB receiver. Once lock is achieved, a sample is taken of the control line voltage of the first VCO whereafter the first VCO control line is held at the sampled voltage and will no longer track the received pilot until such time as the second VCO deviates from a predetermined range. Simultaneous to switching the first VCO, the loop filter of the second VCO is adapted to maintain identical loop dynamics both before and after switching control of the first VCO.
摘要翻译： 公开了一种采用分相锁相环系统的单边带接收机的自动频率控制电路。 最初，第一和第二压控振荡器锁定到在SSB接收机的IF条之后采取的接收到的导频。 一旦达到锁定，则取第一个VCO的控制线电压的样本，之后第一个VCO控制线保持在采样电压，并且将不再跟踪接收到的导频，直到第二个VCO偏离预定范围 。 同时切换第一VCO，第二VCO的环路滤波器适于在第一VCO的切换控制之前和之后保持相同的环路动态。
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