公开(公告)号：US06914885B2

公开(公告)日：2005-07-05

申请号：US09850248

申请日：2001-05-07

申请人： Prasada Rao ,  Robert A. Zak

发明人： Prasada Rao ,  Robert A. Zak

IPC分类号： H04L1/00 ,  H04L1/20 ,  G01R31/08 ,  H04B17/00

CPC分类号： H04L1/203 ,  H04L1/0045

摘要： A demodulated data stream is selected by concurrently demodulating radio signals to provide a first data stream and a second data stream with the first data stream. A first error level associated with the first data stream is determined. A second error level associated with the second data stream is also determined. The data stream having the better error level can be selected for further processing. Related wireless radio receivers are also disclosed.

摘要翻译： 通过同时解调无线电信号以提供具有第一数据流的第一数据流和第二数据流来选择解调数据流。 确定与第一数据流相关联的第一错误级别。 还确定与第二数据流相关联的第二错误级别。 可以选择具有更好错误级别的数据流进行进一步处理。 还公开了相关的无线电接收机。

公开(公告)号：US06625227B1

公开(公告)日：2003-09-23

申请号：US09409505

申请日：1999-09-30

申请人： Eric A. Shull ,  Robert A. Zak

发明人： Eric A. Shull ,  Robert A. Zak

IPC分类号： H04B104

CPC分类号： H03G3/3047

摘要： An artificial ramping waveform profile is applied to a burst transmission power amplifier in order to reduce transients. A profile source is supplied with a plurality of pre-determined artificial ramping profiles. At the beginning of the burst transmission ramping period, one of the artificial ramping profiles is selected and fed to the power amplifier. The selection of the artificial ramping profile is based at least in part on the first message symbol of the message to be burst transmitted. Preferably, each different possible first message symbol has its own unique corresponding artificial ramping profile, and the corresponding waveform is used to artificially ramp the power amplifier when that message symbol is the first message symbol. At the end of the ramping period, the inputs to the power amplifier are switched to the traditional signal source, such as the FIR filters, etc., for receipt of the message symbols. The transmitted signal is based then on the response of the power amplifier to the artificial ramping profile and the message symbols. The generation of transient adjacent channel power is significantly reduced by artificially ramping the power amplifier rather than allowing for natural ramping. By choosing the artificial ramping profile based on the first message symbol, the phase trajectory changes near the end of the ramping period may be significantly smoothed, thereby lessening the generation of undesired harmonic power levels.

摘要翻译： 将人造斜波波形分布应用于突发传输功率放大器以减少瞬变。 轮廓源被提供有多个预定的人造斜坡轮廓。 在突发传输斜坡期的开始，选择人造斜坡分布之一并将其馈送到功率放大器。 人造斜坡曲线的选择至少部分地基于要发送的脉冲串的第一消息符号。 优选地，每个不同的可能的第一消息符号具有其自己唯一的相应的人造斜坡曲线，并且当该消息符号是第一消息符号时，相应的波形被用于人为地斜坡上的功率放大器。 在斜坡期结束时，将功率放大器的输入切换到传统信号源，例如FIR滤波器等，以接收消息符号。 所发送的信号基于功率放大器对人造斜坡曲线和消息符号的响应。 瞬态相邻信道功率的产生通过人为斜坡上的功率放大器而不是允许自然斜坡来显着降低。 通过选择基于第一消息符号的人造斜坡曲线，可以显着平滑在斜坡周期结束附近的相位轨迹变化，从而减少不需要的谐波功率电平的产生。

公开(公告)号：US06829253B1

公开(公告)日：2004-12-07

申请号：US09723634

申请日：2000-11-28

申请人： Havish Koorapaty ,  Robert A. Zak ,  Carl B. Toot

发明人： Havish Koorapaty ,  Robert A. Zak ,  Carl B. Toot

IPC分类号： H04L708

CPC分类号： H04W56/0085 ,  H04B7/2684 ,  H04L7/042 ,  H04L7/08

摘要： Methods and systems for a transceiver to acquire synchronization to a channel in a TDMA communications system by identifying a known synchronization word in a burst received at the transceiver over the channel are provided. Pursuant to these methods and systems a first uncertainty window and a second uncertainty window are defined within a burst that is received over the channel. The transceiver may search in these uncertainty windows for the known synchronization word, where the first uncertainty window is smaller than the second uncertainty window. The first uncertainty window is first searched for the known synchronization word. It may then be determined if the known synchronization word has been located within the first uncertainty window. If it has not been, the second uncertainty window is then searched for the known synchronization word.

摘要翻译： 提供了一种用于通过识别通过信道在收发器处接收的突发中的已知同步字来获取TDMA通信系统中的信道的同步的方法和系统。 根据这些方法和系统，在通过信道接收的脉冲串内定义第一不确定性窗口和第二不确定性窗口。 收发器可以在这些不确定性窗口中搜索已知的同步字，其中第一不确定性窗口小于第二不确定性窗口。 第一个不确定窗口首先搜索已知的同步字。 然后可以确定已知的同步字是否已经位于第一不确定性窗口内。 如果没有，则搜索第二不确定性窗口以获得已知的同步字。

公开(公告)号：US20080183755A1

公开(公告)日：2008-07-31

申请号：US11700618

申请日：2007-01-31

申请人： Robert A. Zak

发明人： Robert A. Zak

IPC分类号： G06F17/00

CPC分类号： H04M19/04 ,  H04M1/72563

摘要： An alert file is stored on an electronic device is operated by determining if an audio format of the alert file is in a first category including at least one high complexity audio format or is in a second category including at least one low complexity audio format, converting the audio format of the alert file to one of the at least one low complexity audio format if the audio format of the alert file is in the first category, and saving the alert file with the converted audio format on the electronic device.

摘要翻译： 通过确定警报文件的音频格式是否处于包括至少一个高复杂度音频格式的第一类别或处于包括至少一个低复杂度音频格式的第二类别中，将警报文件存储在电子设备上，转换 如果警报文件的音频格式处于第一类别，则警报文件的音频格式为至少一种低复杂度音频格式之一，并且将具有转换的音频格式的警报文件保存在电子设备上。

公开(公告)号：US06452991B1

公开(公告)日：2002-09-17

申请号：US09220405

申请日：1998-12-30

申请人： Robert A. Zak

发明人： Robert A. Zak

IPC分类号： H04L100

CPC分类号： H04L7/042 ,  H04B7/2665 ,  H04B7/2681 ,  H04W56/0085

摘要： Systems and methods for locating a known multi-symbol syncword in a received signal are disclosed, wherein a potential syncword is located in a first batch of samples of the received signal which has a correlation energy with the known syncword which exceeds a first detection threshold. A correlation energy with the known syncword for a group of samples in a second batch of samples of the received signal is determined, where the group of samples in the second batch of samples are selected based on the location of the potential syncword within the first batch of samples. The correlation energy associated with the group of samples in the second batch of samples is compared with a second detection threshold that is higher than the first detection threshold. The location of the known syncword may be identified based upon the comparison of the correlation energy associated with the group of samples in the second batch of samples with the second detection threshold.

摘要翻译： 公开了一种用于在接收信号中定位已知多符号同步字的系统和方法，其中潜在同步字位于接收信号的第一批样本中，该第一批样本具有超过第一检测阈值的已知同步字的相关能。 确定与接收信号的第二批样本中的一组样本的已知同步字的相关能，其中基于第一批中的潜在同步字的位置来选择第二批样本中的样本组 的样品。 将与第二批样品中的样品组相关联的相关能量与高于第一检测阈值的第二检测阈值进行比较。 可以基于与第二批次样本中的样本组相关联的相关能量与第二检测阈值的比较来识别已知同步字的位置。

公开(公告)号：US20100153336A1

公开(公告)日：2010-06-17

申请号：US12334828

申请日：2008-12-15

申请人： Robert A. Zak

发明人： Robert A. Zak

IPC分类号： G06F17/30

CPC分类号： H04L67/1095

摘要： A mobile device and method for synchronizing information between electronic devices (e.g., a personal computer, an application server). The method includes establishing a communication link between a mobile device and an electronic device. Detecting a synchronization condition by the mobile device, wherein the synchronization condition is a transfer of data from the electronic device to the mobile device and the data includes a plurality of fields. The data to be transferred is compared to a corresponding field on the mobile device. If the data to be transferred exceeds a maximum data size, the data is parsed to preserve data having a predefined format.

摘要翻译： 一种用于在电子设备（例如，个人计算机，应用服务器）之间同步信息的移动设备和方法。 该方法包括在移动设备和电子设备之间建立通信链路。 由移动设备检测同步状态，其中同步条件是数据从电子设备传送到移动设备，数据包括多个字段。 要传送的数据与移动设备上的相应字段进行比较。 如果要传输的数据超过最大数据大小，则解析数据以保留具有预定格式的数据。

公开(公告)号：US07483692B2

公开(公告)日：2009-01-27

申请号：US10905909

申请日：2005-01-26

申请人： Robert A. Zak ,  Peter M. Mangum ,  Michael Shannon Welch ,  Paul Henry Nichols ,  Myra Rice

发明人： Robert A. Zak ,  Peter M. Mangum ,  Michael Shannon Welch ,  Paul Henry Nichols ,  Myra Rice

IPC分类号： H04Q7/32

CPC分类号： H04M1/72522 ,  G06F3/0237 ,  H04M1/2745 ,  H04M1/274583 ,  H04M2001/274541 ,  H04M2250/22 ,  H04M2250/56

摘要： A method of predicting user input to a mobile terminal is presented. The mobile terminal creates a raw user input data record comprised of input to the mobile terminal. A contextual data record is appended to the raw user input data record and both are stored. Another process processes the records contained in the raw user input database to identify repetitive patterns of user input. Identified patterns are stored in a recognized input pattern database. The mobile terminal then monitors current input and compares it to the repetitive patterns stored in the recognized input pattern database. Upon matching the current input to a repetitive pattern within a specified tolerance, the mobile terminal prompts the user to allow the mobile terminal to complete the process of inputting the data.

摘要翻译： 提出了一种预测用户对移动终端输入的方法。 移动终端创建包括输入到移动终端的原始用户输入数据记录。 上下文数据记录附加到原始用户输入数据记录，并且两者都被存储。 另一个进程处理原始用户输入数据库中包含的记录，以识别用户输入的重复模式。 识别的模式存储在识别的输入模式数据库中。 然后，移动终端监视当前输入并将其与存储在识别的输入模式数据库中的重复模式进行比较。 当将当前输入匹配到指定容限内的重复模式时，移动终端提示用户允许移动终端完成输入数据的处理。

公开(公告)号：US07966034B2

公开(公告)日：2011-06-21

申请号：US10674780

申请日：2003-09-30

申请人： John W. Northcutt ,  Charles Randall Yates ,  Robert A. Zak

发明人： John W. Northcutt ,  Charles Randall Yates ,  Robert A. Zak

IPC分类号： H04M1/00

CPC分类号： H04M19/041 ,  G10H1/0008 ,  G10H2230/021 ,  G10H2240/056 ,  G10H2240/325 ,  H04M1/72527 ,  H04M1/72558 ,  H04M2250/52

摘要： A mobile communications device has a wireless transceiver to facilitate communications, memory, and a processor. The processor may be configured to analyze an audio file stored in the memory, and extract or generate synchronizing information from the audio file. The processor synchronizes one or more complementary multi-media effects, such as lights, a camera, or a tactile feedback generator, with the audio file based on the synchronizing information. Alternatively, a user may input synchronizing information about the audio file via an interface on the communications device. The processor may then control the complementary multi-media effects in synchronization with the input synchronizing information.

摘要翻译： 移动通信设备具有无线收发器以便于通信，存储器和处理器。 处理器可以被配置为分析存储在存储器中的音频文件，并且从音频文件中提取或生成同步信息。 处理器基于同步信息与音频文件同步一个或多个互补多媒体效果，例如灯，照相机或触觉反馈发生器。 或者，用户可以经由通信设备上的接口输入关于音频文件的同步信息。 处理器然后可以与输入的同步信息同步地控制互补的多媒体效果。

公开(公告)号：US6084926A

公开(公告)日：2000-07-04

申请号：US986436

申请日：1997-12-08

申请人： Robert A. Zak ,  George W. Kellam

发明人： Robert A. Zak ,  George W. Kellam

IPC分类号： H04B7/005 ,  H03D1/00

CPC分类号： H04B7/005

摘要： A multi-path demodulator is provided for a mobile radiotelephone that includes a maximum likelihood sequence estimator in parallel with a symbol-by-symbol detector to demodulate the received signals. In a preferred embodiment, an adaptive equalizer is used in a dual-path demodulator in parallel with a differential detector. As each frame of data is demodulated, a determination is made from channel decoder information from each path about which demodulated bit stream to use (e.g., from either the estimator or detector). The performance of the demodulator is thus optimized for both non-time-dispersive and time-dispersive radio signals.

摘要翻译： 提供了一种用于移动无线电话的多路径解调器，其包括与逐符号检测器并行的最大似然序列估计器，以解调所接收的信号。 在优选实施例中，在与差分检测器并联的双路解调器中使用自适应均衡器。 当每个数据帧被解调时，从来自每个路径的信道解码器信息确定要使用哪个解调比特流（例如，来自估计器或检测器）。 因此，解调器的性能对于非时间色散和时间分散的无线电信号都是优化的。

公开(公告)号：US5485522A

公开(公告)日：1996-01-16

申请号：US128639

申请日：1993-09-29

申请人： Torbjon W. Solve ,  Robert A. Zak

发明人： Torbjon W. Solve ,  Robert A. Zak

IPC分类号： G10L11/02 ,  G10L21/02 ,  G10L3/00

CPC分类号： G10L21/0364 ,  G10L2021/02168 ,  G10L2025/786

摘要： A method and system are provided for adaptively reducing noise in frames of digitized audio signals that may include both speech and background noise. Frames of digitized audio signals are processed to determine what attenuation (if any) should be applied to the current frame of digitized audio signals. Initially it is determined whether the current frame of digitized audio signals includes speech information, this determination being based upon an estimate of noise and on a speech threshold value. An attenuation value determined for the previous audio frame is modified based on this determination and applied to the current frame in order to minimize the background noise which thereby improves the quality of received speech. The attenuation applied to the audio frames is modified gradually on a frame-by-frame basis, each sample in a specific frame is attenuated using the value calculated for that frame. The adaptive noise reduction system may be advantageously applied to telecommunication systems in which portable radio transceivers communicate over RF channels because the adaptive noise reduction technique does not significantly increase data processing overhead.

摘要翻译： 提供了一种方法和系统，用于自适应地降低可能包括语音和背景噪声的数字化音频信号的帧中的噪声。 数字化音频信号的帧被处理以确定应当将什么衰减（如果有的话）应用于当前的数字化音频信号帧。 首先，确定数字化音频信号的当前帧是否包括语音信息，该确定基于噪声的估计和语音阈值。 为了使背景噪声最小化，基于该确定对前一音频帧确定的衰减值进行修改并将其应用于当前帧，从而提高接收到的语音质量。 逐帧修改施加到音频帧的衰减，使用针对该帧计算的值来衰减特定帧中的每个采样。 自适应噪声降低系统可以有利地应用于便携式无线电收发机通过RF信道进行通信的电信系统，因为自适应噪声降低技术不会显着增加数据处理开销。