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1. 发明授权

US5719908A Digital/analog bit synchronizer 失效
标题翻译：数字/模拟位同步器
公开(公告)号：US5719908A
公开(公告)日：1998-02-17
申请号：US503953
申请日：1995-07-19
申请人： Roy Edgar Greeff , Glenn Arthur Arbanas , Bruce Howard Williams
发明人： Roy Edgar Greeff , Glenn Arthur Arbanas , Bruce Howard Williams
IPC分类号： H03D13/00 , H03L7/085 , H03L7/095 , H03L7/12 , H04L7/033 , H03D3/24
CPC分类号： H03D13/004 , H03L7/085 , H03L7/095 , H03L7/12 , H04L7/033
摘要： A high speed bit synchronizer is provided with a digital phase detector and a digital offset eliminating circuit. The output of the digital offset eliminating circuit is summed together with the output of the digital phase detector to compensate for the DC offset voltage generated by unsymmetrical digital data received at the input of the phase detector. Further, the phase error offset voltage produced at the output of the digital phase detector is linearized so that the lock point of the phase S-curve located on a linearized portion of a phase offset S-curve, thus, substantially eliminating all seeking and jitter that normally occurs at the lock point.
摘要翻译：高速位同步器具有数字相位检测器和数字偏移消除电路。数字失调消除电路的输出与数字相位检测器的输出相加，以补偿在相位检测器的输入端处接收的不对称数字数据产生的DC偏移电压。此外，在数字相位检测器的输出处产生的相位误差偏移电压被线性化，使得位于相位偏移S-曲线的线性化部分上的相位S曲线的锁定点基本上消除了所有寻找和抖动通常发生在锁定点。

2. 发明授权

US5696795A Offset quadrature phase shift keyed modulation circuit 失效
标题翻译：偏移正交相移键控调制电路
公开(公告)号：US5696795A
公开(公告)日：1997-12-09
申请号：US503954
申请日：1995-07-19
申请人： Bruce Howard Williams , Roy Edgar Greeff , Glenn Arthur Arbanas
发明人： Bruce Howard Williams , Roy Edgar Greeff , Glenn Arthur Arbanas
IPC分类号： H04L27/20
CPC分类号： H04L27/2092
摘要： An improved quadrature phase shift key modulator circuit of the type which includes a non-linear amplifier in the transmitter and includes a frequency select logic circuit for receiving the in phase and quadrature phase digital data to be modulated onto a carrier frequency signal. The output of the frequency select circuit produces select signals that are coupled to the input of a digital carrier frequency generator. The digital carrier frequency generator synthesizes and increases, decreases, or leaves unchanged the carrier frequency as a representation of the data occurring on the in phase and quadrature phase input lines. The output of the digital carrier frequency generator is smoothed and converted to an analog signal which has a constant vector power magnitude during phase change. The constant vector power when amplified in a non-linear amplifier of the transmitter is not susceptible to regeneration of side lobes of the carrier signal, thus, provides a more narrow bandwidth modulated carrier frequency signal.
摘要翻译：一种改进的正交相移键调制器电路，其类型包括发射机中的非线性放大器，并且包括用于接收待调制到载波频率信号上的同相和正交相位数字数据的频率选择逻辑电路。频率选择电路的输出产生耦合到数字载波频率发生器的输入端的选择信号。数字载波频率发生器合成并增加，减少或保持载波频率不变，作为在同相和正交相位输入线上发生的数据的表示。数字载波频率发生器的输出被平滑化并转换成在相变期间具有恒定矢量功率幅度的模拟信号。在发射机的非线性放大器中放大的恒定矢量功率不容易对载波信号的旁瓣的再生，因此提供更窄的带宽调制载波频率信号。

3. 发明授权

US5793797A Data transmisson system with a low peak-to-average power ratio based on distorting small amplitude signals 失效
标题翻译：数据传输系统基于失真的小振幅信号具有低峰值与平均功率比
公开(公告)号：US5793797A
公开(公告)日：1998-08-11
申请号：US437764
申请日：1995-05-09
申请人： Thomas Robert Giallorenzi , David William Matolak , Johnny Michael Harris , Robert William Steagall , Bruce Howard Williams
发明人： Thomas Robert Giallorenzi , David William Matolak , Johnny Michael Harris , Robert William Steagall , Bruce Howard Williams
IPC分类号： H04B1/62 , H04J13/00 , H04B15/00 , H04K1/00 , H04L27/30
CPC分类号： H04B1/62 , H04B2201/70706 , H04J13/0003
摘要： An electronic data transmission system has a low peak-to-average power ratio by including a transmitter circuit which receives an input signal and in response generates a distorted output signal. This distorted output signal is generated by amplifying the input signal with one particular gain when the input signal is at a maximum magnitude which gives the distorted output signal a corresponding maximum magnitude, and by amplifying the input signal with a larger gain when the input signal is in a predetermined range below the maximum magnitude. The distorted output signal travels over a communication channel to a receiver circuit, which regenerates the input signal by amplifying the distorted output signal with a gain that is the inverse of the gain by which the distorted signal is generated.
摘要翻译：电子数据传输系统通过包括接收输入信号的发射机电路并且响应于产生失真的输出信号而具有低的峰均功率比。当输入信号为最大幅度时，通过放大具有一个特定增益的输入信号来产生失真的输出信号，该最大幅度给失真的输出信号相应的最大幅度，并且当输入信号为在最大幅度以下的预定范围内。失真的输出信号通过通信信道传播到接收机电路，其通过用与产生失真信号的增益的倒数相反的增益放大失真输出信号来再生输入信号。

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