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1. 发明授权

US06853693B1 Method and apparatus for gain normalization of a correlation demodulator 有权
标题翻译：相关解调器增益归一化的方法和装置
公开(公告)号：US06853693B1
公开(公告)日：2005-02-08
申请号：US09560967
申请日：2000-04-28
申请人： Christopher T. Thomas , Chun-Ye Susan Chang , Clinton C Powell, II
发明人： Christopher T. Thomas , Chun-Ye Susan Chang , Clinton C Powell, II
IPC分类号： H04L7/04 , H04L27/156 , H04L27/38 , H04L27/06 , H03K9/00
CPC分类号： H04L27/156 , H04L7/042 , H04L27/3809
摘要： A correlation demodulator unit (20) having gain normalization includes a correlation demodulator (12) for receiving a signal from a receiver (8). The correlation demodulator has a plurality of correlators (C1-CN) corresponding to a plurality of N correlator outputs. A gain normalizer (15) is coupled to the correlation demodulator for accumulating symbol energy on a symbol by symbol basis for each of the plurality of correlator outputs based upon a current symbol decision providing at least an accumulated value within an accumulator (43) for the plurality of correlators and for normalizing the plurality of N correlator outputs using the accumulated value(s).
摘要翻译：具有增益归一化的相关解调器单元（20）包括用于从接收器（8）接收信号的相关解调器（12）。相关解调器具有对应于多个N个相关器输出的多个相关器（C1-CN）。增益归一化器（15）被耦合到相关解调器，用于基于当前符号判定提供每个符号基础的符号基础累积符号能量，所述当前符号决定至少提供累加器（43）内的累积值，用于多个相关器，并且使用累积值对多个N个相关器输出进行归一化。

2. 发明授权

US6111855A Method and apparatus for baud detection in a communication device 失效
标题翻译：通信设备中波特率检测的方法和装置
公开(公告)号：US6111855A
公开(公告)日：2000-08-29
申请号：US128161
申请日：1998-08-03
申请人： Chun-Ye Susan Chang , Clinton C Powell, II
发明人： Chun-Ye Susan Chang , Clinton C Powell, II
IPC分类号： H04L25/02 , H04J3/14
CPC分类号： H04L25/0262
摘要： A method (500) of baud detection in a communication device (700) includes the steps of sorting phase pulses among overlapping sets of time slots (502) and counting phase pulses within each of the overlapping sets of time slots creating corresponding counter values (504). Then, counter values are compared with predetermined thresholds (506-512), wherein a baud pass condition (570) is met when at least one counter has a counter value exceeding an upper threshold and wherein a counter N/2 positions away has a counter value below a lower threshold. The baud pass condition may he further conditioned on meeting the requirement that at least another counter value falls below a middle threshold.
摘要翻译：在通信设备（700）中的波特率检测的方法（500）包括以下步骤：对重叠的时隙集合（502）中的相位脉冲进行排序，并计算每个重叠的时隙集合内的相位脉冲，产生相应的计数器值（504 ）。然后，将计数器值与预定阈值（506-512）进行比较，其中当至少一个计数器具有超过上阈值的计数器值时，满足波特率条件（570），并且其中远离计数器N / 2的位置具有计数器值低于较低的阈值。波特率通过条件可能进一步受限于满足至少另一个计数器值低于中间阈值的要求。

3. 发明授权

US5960042A Method in a selective call receiver for synchronizing to a multi-level radio signal 失效
标题翻译：用于同步到多电平无线电信号的选呼接收机中的方法
公开(公告)号：US5960042A
公开(公告)日：1999-09-28
申请号：US886356
申请日：1997-07-01
申请人： Chun-Ye Susan Chang , Clinton C. Powell, II , James Michael Keba , Stephen R. Carsello
发明人： Chun-Ye Susan Chang , Clinton C. Powell, II , James Michael Keba , Stephen R. Carsello
IPC分类号： H04L7/033 , H04L27/152 , H04L25/49
CPC分类号： H04L7/0334 , H04L27/1525
摘要： A selective call receiver (800), including a receiver circuit (101) and a processor (810), is used for synchronizing an internal reference to symbol edges of a plurality of symbols in a multi-level radio signal transmitted by a radio communication system. To perform this function the processor (810) is adapted to cause the receiver circuit (101) to demodulate the multilevel radio signal to in-phase and quadrature signals (108, 106), convert the in-phase and quadrature signals (108, 106) to a sequence of state transitions representative of the plurality of symbols, detect at least one same state transition from the sequence of state transitions, and synchronize the internal reference to the at least one symbol edge of the plurality of symbols based on the at least one same state transition.
摘要翻译：包括接收机电路（101）和处理器（810）的选呼接收机（800）用于使内部参考与由无线电通信系统发送的多级无线电信号中的多个符号的符号边缘同步。为了执行该功能，处理器（810）适于使得接收机电路（101）将多电平无线电信号解调为同相和正交信号（108,106），将同相和正交信号（108,106））到表示所述多个符号的状态转移序列，从所述状态转换序列检测至少一个相同的状态转换，并且基于至少基于所述多个符号的所述至少一个符号边缘的所述至少一个符号边沿来同步所述内部参考同一个国家过渡。

4. 发明授权

US5799043A Method and apparatus for decoding a two-level radio signal 失效
标题翻译：用于解码两电平无线电信号的方法和装置
公开(公告)号：US5799043A
公开(公告)日：1998-08-25
申请号：US867498
申请日：1997-06-02
申请人： Chun-Ye Susan Chang , James Rodney Webster , Clinton C. Powell, II
发明人： Chun-Ye Susan Chang , James Rodney Webster , Clinton C. Powell, II
IPC分类号： H04L25/06 , H04L25/48 , H04L25/34
CPC分类号： H04L25/062
摘要： A selective call unit (800) comprising a receiver (100) and a processor (810) is used for decoding a 2-level radio signal. The processor (810) is adapted to convert in-phase and quadrature signals generated by the receiver (100) to a sequence of state transitions representative of the plurality of symbols. For each symbol in the plurality of symbols, the processor (810) counts the sequence of state transitions during a symbol period, and compares the recorded count to a predetermined threshold, thereby generating a comparison result. The processor (810) then calculates a bit decision threshold level based on an average of the comparison result for each symbol in the plurality of symbols. For each symbol in a plurality of subsequent symbols, the processor (810) then compares the bit decision threshold level to the sequence of state transitions counted during a symbol period to decode a digital logic level therefrom.
摘要翻译：包括接收机（100）和处理器（810）的选呼单元（800）用于对2级无线电信号进行解码。处理器（810）适于将由接收机（100）产生的同相和正交信号转换为表示多个符号的状态转换序列。对于多个符号中的每个符号，处理器（810）在符号周期期间对状态转换序列进行计数，并将记录的计数与预定阈值进行比较，从而生成比较结果。然后，处理器（810）基于多个符号中的每个符号的比较结果的平均值来计算比特判定阈值水平。对于多个后续符号中的每个符号，处理器（810）然后将比特判定阈值电平与在符号周期期间计数的状态转换序列进行比较，以从其中解码数字逻辑电平。

5. 发明授权

US06571083B1 Method and apparatus for automatic simulcast correction for a correlation detector 失效
标题翻译：用于相关检测器的自动联播校正的方法和装置
公开(公告)号：US06571083B1
公开(公告)日：2003-05-27
申请号：US09306663
申请日：1999-05-05
申请人： Clinton C Powell, II , James David Hughes , Chun-Ye Susan Chang , Christopher T. Thomas , Mahibur Rahman , Edgar Herbert Callaway, Jr. , James A. Kimball
发明人： Clinton C Powell, II , James David Hughes , Chun-Ye Susan Chang , Christopher T. Thomas , Mahibur Rahman , Edgar Herbert Callaway, Jr. , James A. Kimball
IPC分类号： H04B100
CPC分类号： H04W88/022
摘要： An automatic simulcast correction method (300) for a selective call receiver (100) includes the steps of measuring a received signal (304) for a received signal strength indication measurement and then determining if a protocol indicates a simulcast signal (310). If the received signal strength indication measurement is above a predefined threshold and the protocol indicates the simulcast signal, then the selective call receiver is optimized for simulcast delay spread distortion (312). If the received signal strength indication measurement is below a predefined threshold or the protocol does not indicate the simulcast signal, then the selective call receiver is optimized for static sensitivity (314).
摘要翻译：用于选呼接收机（100）的自动同步播放校正方法（300）包括以下步骤：测量接收信号强度指示测量的接收信号（304），然后确定协议是否指示同播信号（310）。如果接收到的信号强度指示测量值高于预定阈值，并且协议指示同播信号，则选择呼叫接收机被优化用于联播延迟扩展失真（312）。如果接收到的信号强度指示测量值低于预定阈值，或该协议不指示同播信号，则选择呼叫接收机针对静态灵敏度进行了优化（314）。

6. 发明授权

US06263014B1 Method and apparatus for correlation detection of multi-level signals with non-standard deviations 有权
标题翻译：具有非标准偏差的多电平信号的相关检测方法和装置
公开(公告)号：US06263014B1
公开(公告)日：2001-07-17
申请号：US09145956
申请日：1998-09-03
申请人： Chun-Ye Susan Chang , Clinton C Powell, II , Craig P. Wadin
发明人： Chun-Ye Susan Chang , Clinton C Powell, II , Craig P. Wadin
IPC分类号： H04B1500
CPC分类号： H04L27/148
摘要： A method (200) of decoding a multi-level synchronous protocol having a first portion encoded as M/2-level signals and a subsequent portion encoded as M/2-level signal or M-level signals, wherein the M/2-level signals have expected larger than normal variation of deviations includes steps of decoding (202) the first portion using a biased mode which uses M correlators shifted (204) to adequately cover the frequency range of the expected larger than normal variation of deviations and determining (206) from decoding of the first portion whether the subsequent portion is the M/2-level or M-level signal. If a M/2-level signal is found, continue decoding (210) in the biased mode. If it's the M-level signal, then decoding continues in standard mode (214), which uses M correlators that are spaced in frequency to match M spectral deviations within a predetermined frequency range.
摘要翻译：一种解码具有被编码为M / 2电平信号的第一部分和被编码为M / 2电平信号或M电平信号的后续部分的多电平同步协议的方法（200），其中M / 2电平信号预期大于正常的偏差变化包括使用偏移模式对第一部分进行解码（202）的步骤，所述偏置模式使用移位（204）的M个相关器来充分覆盖期望的大于正常偏差变化的频率范围并确定（206 ）从第一部分的解码来看，后续部分是M / 2电平还是M电平信号。如果发现M / 2电平信号，则在偏置模式下继续解码（210）。如果它是M级信号，则在标准模式（214）中继续解码，其使用频率间隔的M个相关器来匹配预定频率范围内的M个频谱偏差。

7. 发明授权

US5692019A Communication device having antenna switch diversity, and method therefor 失效
标题翻译：具有天线开关分集的通信装置及其方法
公开(公告)号：US5692019A
公开(公告)日：1997-11-25
申请号：US664747
申请日：1996-06-17
申请人： Chun-Ye Susan Chang , Jian-Cheng Huang , Lu Chang , Lorenzo Ponce De Leon , David Petreye , James Michael Keba , Clinton C. Powell, II
发明人： Chun-Ye Susan Chang , Jian-Cheng Huang , Lu Chang , Lorenzo Ponce De Leon , David Petreye , James Michael Keba , Clinton C. Powell, II
IPC分类号： H04B7/10 , H04L1/02
CPC分类号： H04L1/02 , H04B7/10
摘要： A communication device (400) with a polarization diversity antenna configuration, having a first antenna (410) with a first plane of polarization and a second antenna (412) with a second plane of polarization. Signal strength of a demodulated signal when the antenna switch (420) is coupled to one of the antennas (410, 412) is measured by a signal strength measuring circuit (440) to generate a short-term average signal power (SA) representing signal strength over a first predetermined number of symbol periods, a medium-term average signal power (MA) representing signal strength over a second predetermined number of symbol periods, and a long-term average signal power (LA) representing signal strength over a third predetermined number of symbol periods, greater than the second predetermined number of symbol periods and first predetermined number of symbol periods. Switching between antennas (410, 412) is made in response to differences between SA, MA and LA.
摘要翻译：具有极化分集天线配置的通信设备（400）具有具有第一偏振平面的第一天线（410）和具有第二偏振平面的第二天线（412）。天线开关（420）耦合到天线（410,412）之一时的解调信号的信号强度由信号强度测量电路（440）测量，以产生表示信号的短期平均信号功率（SA）超过第一预定数量的符号周期的强度，表示第二预定数量的符号周期的信号强度的中期平均信号功率（MA）以及表示超过第三预定数量的信号强度的长期平均信号功率（LA）符号周期的数量，大于第二预定数量的符号周期和第一预定数量的符号周期。响应于SA，MA和LA之间的差异，在天线（410,412）之间进行切换。

8. 发明授权

US5724001A Method and apparatus for demodulating a frequency shift keyed signal 失效
标题翻译：用于解调频移键控信号的方法和装置
公开(公告)号：US5724001A
公开(公告)日：1998-03-03
申请号：US753816
申请日：1996-12-02
申请人： Chun-Ye Susan Chang
发明人： Chun-Ye Susan Chang
IPC分类号： H03D3/00 , H04L27/156 , H04L27/14
CPC分类号： H03D3/009 , H04L27/1563
摘要： A receiver (100) is utilized for demodulating a multi-level frequency shift keyed (FSK) signal. The receiver (100) includes a mixer (102) for mixing the multi-level FSK signal to generate an in-phase signal and a quadrature signal, and a demodulator circuit (110) coupled to the mixer (102). The demodulator circuit (110) is adapted to count a sequence of state transitions of the in-phase signal and the quadrature signal and to determine a frequency deviation of the multi-level FSK signal based on the sequence of state transitions counted.
摘要翻译：接收机（100）用于解调多级频移键控（FSK）信号。接收器（100）包括用于混合多电平FSK信号以产生同相信号和正交信号的混频器（102），以及耦合到混频器（102）的解调器电路（110）。解调器电路（110）适于对同相信号和正交信号的状态转换序列进行计数，并且基于所计数的状态转换序列来确定多电平FSK信号的频率偏差。

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