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1.发明授权公开(公告)号：US08027326B2
公开(公告)日：2011-09-27
申请号：US11033524
申请日：2005-01-12
IPC分类号： H04J1/00
摘要： A method and system provides a way to achieve very high data rate expanded bandwidth (wide band) WLAN operations reusing existing single channel radio designs. The system provides a dual-channel form of operation for greater flexibility and performance across multiple platforms. Further, the system provides adaptive anti-aliasing techniques for eliminating aliasing due to adjacent channel waveform effects. These techniques mesh with existing systems cleanly.
摘要翻译： 一种方法和系统提供了一种实现非常高的数据速率扩展带宽（宽带）WLAN操作的方式，重用现有的单通道无线电设计。 该系统提供了双通道的操作形式，可在多个平台上实现更大的灵活性和性能。 此外，该系统提供用于消除由于相邻信道波形效应引起的混叠的自适应抗混叠技术。 这些技术干净地与现有系统联网。
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公开(公告)号：US07957463B2
公开(公告)日：2011-06-07
申请号：US12246219
申请日：2008-10-06
IPC分类号： H03K5/159
CPC分类号： H04L25/03159 , H04L25/022 , H04L2025/03414 , H04L2025/03522
摘要： An adaptive frequency equalization system providing an equalizer that has programmable taps that adjusts magnitude and phase of symbol information of a received signal and that provides equalized symbol information. The system includes a hard decision circuit that selects ideal symbol values using the equalized symbol information. A frequency response circuit determines frequency response update values using the ideal symbol values and the received signal. An adjust circuit updates stored frequency response information using the frequency response update values, and also updates the programmable taps of the equalizer using the stored frequency response information.
摘要翻译： 一种自适应频率均衡系统，其提供均衡器，该均衡器具有调节接收信号的符号信息的幅度和相位并且提供均衡的符号信息的可编程抽头。 该系统包括使用均衡符号信息来选择理想符号值的硬判决电路。 频率响应电路使用理想符号值和接收信号来确定频率响应更新值。 调整电路使用频率响应更新值更新存储的频率响应信息，并且还使用所存储的频率响应信息来更新均衡器的可编程抽头。
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公开(公告)号：US5818867A
公开(公告)日：1998-10-06
申请号：US708807
申请日：1996-09-09
CPC分类号： H04B1/707 , H04L27/2014
摘要： A modulator device is disclosed for a spread spectrum communication system which generates a modulated signal from incoming data. The device includes a QPSK portion for separating the incoming data into two data channels and for further spreading the two channels over a wide bandwidth according to a predetermined spreading code. A phase mapping element coupled to the QPSK portion for processing both channels in order to minimize spectral regrowth of the modulated signal by preventing the RF envelope deviation from going close to zero. Pulse shaping elements coupled to the phase mapping element for further processing each channel in order to improve the modulator spectral efficiency and minimize adjacent channel interference. A quad-mixer coupled to the pulse shaping elements for combining both channels into a recombined signal and for further modulating the recombined signal according to a predetermined carrier frequency.
摘要翻译： 公开了一种用于从输入数据生成调制信号的扩频通信系统的调制器装置。 该装置包括用于将输入数据分离为两个数据信道并用于根据预定扩展码在宽带宽上进一步扩展两个信道的QPSK部分。 耦合到QPSK部分以用于处理两个信道的相位映射元件，以便通过防止RF包络偏差接近于零来最小化调制信号的频谱再生长。 脉冲整形元件耦合到相位映射元件，用于进一步处理每个通道，以便提高调制器频谱效率并使相邻信道干扰最小化。 耦合到脉冲整形元件的四混频器，用于将两个信道组合成重组信号，并根据预定载波频率进一步调制重组信号。
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公开(公告)号：US4922506A
公开(公告)日：1990-05-01
申请号：US142707
申请日：1988-01-11
IPC分类号： H04B1/707 , H04L27/227
CPC分类号： H04B1/707 , H04L27/2278
摘要： This disclosure relates to a technique for estimating the characteristics of a propagation channel by processing a cyclostationary signal which has passed through it. The technique extends to the use of this estimate to reduce the impact of the channel distortion on the recovered signal. Unique features of this technique include its ability to function even when strong interference is present with the cyclostationary signal of interest.
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公开(公告)号：US20090116545A1
公开(公告)日：2009-05-07
申请号：US12246219
申请日：2008-10-06
IPC分类号： H03K5/159
CPC分类号： H04L25/03159 , H04L25/022 , H04L2025/03414 , H04L2025/03522
摘要： An adaptive frequency equalization system providing an equalizer that has programmable taps that adjusts magnitude and phase of symbol information of a received signal and that provides equalized symbol information. The system includes a hard decision circuit that selects ideal symbol values using the equalized symbol information. A frequency response circuit determines frequency response update values using the ideal symbol values and the received signal. An adjust circuit updates stored frequency response information using the frequency response update values, and also updates the programmable taps of the equalizer using the stored frequency response information.
摘要翻译： 一种自适应频率均衡系统，其提供均衡器，该均衡器具有调节接收信号的符号信息的幅度和相位并且提供均衡的符号信息的可编程抽头。 该系统包括使用均衡符号信息来选择理想符号值的硬判决电路。 频率响应电路使用理想符号值和接收信号来确定频率响应更新值。 调整电路使用频率响应更新值更新存储的频率响应信息，并且还使用存储的频率响应信息来更新均衡器的可编程抽头。
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公开(公告)号：US07447261B2
公开(公告)日：2008-11-04
申请号：US10886025
申请日：2004-07-08
IPC分类号： H03K5/159
CPC分类号： H04L25/03159 , H04L25/022 , H04L2025/03414 , H04L2025/03522
摘要： An adaptive frequency equalization system providing an equalizer that has programmable taps that adjusts magnitude and phase of symbol information of a received signal and that provides equalized symbol information. The system includes a hard decision circuit that selects ideal symbol values using the equalized symbol information. A frequency response circuit determines frequency response update values using the ideal symbol values and the received signal. An adjust circuit updates stored frequency response information using the frequency response update values, and also updates the programmable taps of the equalizer using the stored frequency response information.
摘要翻译： 一种自适应频率均衡系统，其提供均衡器，该均衡器具有调节接收信号的符号信息的幅度和相位并且提供均衡的符号信息的可编程抽头。 该系统包括使用均衡符号信息来选择理想符号值的硬判决电路。 频率响应电路使用理想符号值和接收信号来确定频率响应更新值。 调整电路使用频率响应更新值更新存储的频率响应信息，并且还使用所存储的频率响应信息来更新均衡器的可编程抽头。
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