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1. 发明申请

US20050157637A1 Cell search method for orthogonal frequency division multiplexing based cellular communication system 有权
标题翻译：基于蜂窝通信系统的正交频分复用的小区搜索方法
公开(公告)号：US20050157637A1
公开(公告)日：2005-07-21
申请号：US10748550
申请日：2003-12-29
申请人： Chih-Chun Feng , Yung-Hua Hung , Chun-Hung Liu
发明人： Chih-Chun Feng , Yung-Hua Hung , Chun-Hung Liu
IPC分类号： H04J11/00 , H04B7/26 , H04J13/04 , H04L5/02 , H04L7/04 , H04L27/26 , H04Q7/22 , H04Q7/38
CPC分类号： H04L27/2655 , H04J11/0069 , H04L5/0021 , H04L27/2613 , H04L27/2656 , H04L27/2662
摘要： A method for synchronizing and identifying the cell code (scrambling code) of a cell in an orthogonal frequency division multiplexing (OFDM) based cellular communication system is provided. In this method, desired cell is found by utilizing a frame structure of OFDM symbols and through a corresponding cell search procedure, where the frame structure has periodic signal pattern and contains the information about the cell code of the desired cell in common pilot channel (CPICH) signal. And, the cell search method utilizes the periodic property of the frame structure to detect frame timing, and the correlation property of CPICH signal to identify the cell code. The cell search method of the present invention offers the advantages of good link quality, fast acquisition, and low power consumption.
摘要翻译：提供了一种在基于正交频分复用（OFDM）的蜂窝通信系统中同步和识别小区的小区码（扰码）的方法。在该方法中，通过利用OFDM符号的帧结构并通过相应的小区搜索过程找到所需小区，其中帧结构具有周期性信号模式，并且在公共导频信道（CPICH）中包含关于期望小区的小区码的信息）信号。并且，小区搜索方法利用帧结构的周期属性来检测帧定时，以及CPICH信号的相关性以识别小区码。本发明的小区搜索方法具有良好的链路质量，快速采集和低功耗的优点。

2. 发明授权

US07809064B2 Systems and methods of flexible power management applicable to digital broadcasting 有权
标题翻译：柔性电源管理的系统和方法适用于数字广播
公开(公告)号：US07809064B2
公开(公告)日：2010-10-05
申请号：US11140309
申请日：2005-05-27
申请人： Ching-Yung Chen , Fang-Chu Chen , Chih-Chun Feng , Ce-Min Fang
发明人： Ching-Yung Chen , Fang-Chu Chen , Chih-Chun Feng , Ce-Min Fang
IPC分类号： H04N7/12 , H04N7/173
CPC分类号： H04H40/18
摘要： A system for receiving a digital broadcast includes an input terminal that receives the digital broadcast containing scalable data, and a controller for controlling an operation mode of the system. In addition, the system may also include a processor that decodes the data, and a power management device that varies the amount of data to be decoded according to the operation mode.
摘要翻译：用于接收数字广播的系统包括：接收包含可伸缩数据的数字广播的输入终端;以及用于控制系统的操作模式的控制器。此外，系统还可以包括对数据进行解码的处理器，以及根据操作模式改变要解码的数据量的电源管理装置。

3. 发明授权

US07315580B2 Method and apparatus for high-order PAPR reduction of an OFDM signal 有权
标题翻译：用于OFDM信号的高阶PAPR降低的方法和装置
公开(公告)号：US07315580B2
公开(公告)日：2008-01-01
申请号：US10925462
申请日：2004-08-24
申请人： Chih-Chun Feng , Chih-Yaw Wang
发明人： Chih-Chun Feng , Chih-Yaw Wang
IPC分类号： H04K27/00 , H04L25/03 , H04J11/00
CPC分类号： H04L27/2621
摘要： A method and apparatus for high-order peak-to-average power ratio reduction of an OFDM signal are disclosed. The method partitions time-domain input data x[n] of length N into M disjoint subblocks in time domain, and a complete N-point transmitted signal {tilde over (x)}[n], n=0, 1, . . . , N−1, is composed after transformation, complex multiplication, and phase optimization, where M is a power of 2, M≧8 and N/M>1 is an integer. Accordingly, the apparatus comprises an N-point inverse fast Fourier transform (N-IFFT), a de-multiplexer, a transformer, two sets of memories, a plurality of complex multipliers, and an adder. This invention uses only one N-IFFT, whereby it achieves significant computation reduction. As M=8, the number of complex multiplications and that of memory units required are less than or equal to (N/2)log2N+(3N/4) and 3N/2, respectively. The invention also preserves the inherent property as well as advantages of an OFDM system.
摘要翻译：公开了一种用于OFDM信号的高阶峰值与平均功率比降低的方法和装置。该方法将长度为N的时域输入数据x [n]分为时域中的M个不相交的子块，以及完整的N点发送信号x [n]，n = 0,1。。。 N-1是在变换，复数乘法和相位优化之后组成的，其中M是2的幂，M> = 8，N / M> 1是整数。因此，该装置包括N点快速傅里叶逆变换（N-IFFT），解复用器，变压器，两组存储器，多个复数乘法器和加法器。本发明仅使用一个N-IFFT，从而实现显着的计算减少。在M = 8时，复乘次数和所需存储器单元的数目分别小于或等于（N / 2）log 2 N +（3 N / 4）和3 N / 2。本发明还保留了OFDM系统的固有特性和优点。

4. 发明申请

US20060072679A1 Method and device for modulation recognition of digitally modulated signals with multi-level magnitudes 有权
标题翻译：用于多电平量程数字调制信号调制识别的方法和装置
公开(公告)号：US20060072679A1
公开(公告)日：2006-04-06
申请号：US10956603
申请日：2004-10-01
申请人： Ching-Yung Chen , Chih-Chun Feng
发明人： Ching-Yung Chen , Chih-Chun Feng
IPC分类号： H04L5/12
CPC分类号： H04L27/0012 , H04B1/0003 , H04L27/0008
摘要： A modulation recognition method and device for digitally modulated signals with multi-level magnitudes are provided. The modulation recognition method includes selecting plural of quantization sizes used to construct plural of statistic histograms related to the magnitude of a sequence of data, setting up an off-line processing to extract plural of useful feature patterns for each modulation type of interest, receiving a sequence of samples of the modulated object signal and constructing plural of statistic histograms related to the magnitude of these samples, and adopting a hierarchical classification method for modulation recognition. It can be applied to the adaptive-modulation communication system, software defined radio, digital broadcasting systems and military communication systems. It can also be integrated with modulation recognition techniques for other types of modulated signals to function in a universal demodulator. It recognizes digitally modulated signals of multi-level magnitudes with low computational complexity in advancing the efficiency of communication systems.
摘要翻译：提供了一种具有多级数值的数字调制信号的调制识别方法和装置。调制识别方法包括：选择多个量化大小，用于构建与数据序列的幅度相关的多个统计量化直方图，设置离线处理以提取每个感兴趣的调制类型的有用特征图案，接收一个调制对象信号的样本序列，并构建与这些样本的幅度有关的多个统计直方图，并采用分层分类方法进行调制识别。它可以应用于自适应调制通信系统，软件定义无线电，数字广播系统和军事通信系统。它也可以与用于其他类型的调制信号的调制识别技术集成在通用解调器中起作用。它在提高通信系统效率的同时，以低计算复杂度识别多电平量级的数字调制信号。

5. 发明申请

US20050270968A1 Method and apparatus for PAPR reduction of an OFDM signal 有权
标题翻译： OFDM信号的PAPR降低的方法和装置
公开(公告)号：US20050270968A1
公开(公告)日：2005-12-08
申请号：US10859758
申请日：2004-06-02
申请人： Chih-Chun Feng , Chih-Yaw Wang
发明人： Chih-Chun Feng , Chih-Yaw Wang
IPC分类号： H04J11/00 , H04L27/26
CPC分类号： H04L27/2621 , H04L27/2614
摘要： An apparatus and a method for peak-to-average power ratio reduction of an OFDM signal are disclosed. The method uses the interleaved characteristics of partial transmit sequences to partition input data x[n] of length N into several disjoint subblocks in time domain, and a complete N-point signal {tilde over (x)}[n] is composed after phase optimization, where N is the length of an OFDM signal and n=0, 1, . . . , N−1. Accordingly, the apparatus comprises an N-point inverse fast Fourier transform (N-IFFT), a de-multiplexer, a combiner, a set of memory and an adder. This invention uses only one N-IFFT, whereby it can achieve significant computation reduction. This invention requires (N/2)log2 N complex multiplications and N memory units. It also preserves the inherent property as well as advantages of an OFDM system.
摘要翻译：公开了一种用于OFDM信号的峰均功率比降低的装置和方法。该方法采用部分发送序列的交织特性，将长度为N的输入数据x [n]划分成时域中的多个不相交的子块，完成N点信号x [n]在相位优化后构成，其中N为 OFDM信号的长度，n = 0,1，...。。。，N-1。因此，该装置包括N点快速傅里叶逆变换（N-IFFT），解复用器，组合器，一组存储器和加法器。本发明仅使用一个N-IFFT，从而可以实现显着的计算减少。本发明需要（N / 2）对数N 2个复乘法和N个存储器单元。它还保留了OFDM系统的内在特性和优点。

6. 发明申请

US20110044388A1 SYSTEMS AND METHODS OF FLEXIBLE POWER MANAGEMENT APPLICABLE TO DIGITAL BROADCASTING 审中-公开
标题翻译：适用于数字广播的柔性电源管理系统和方法
公开(公告)号：US20110044388A1
公开(公告)日：2011-02-24
申请号：US12868393
申请日：2010-08-25
申请人： Ching-Yung Chen , Fang-Chu Chen , Chih-Chun Feng , Ce-Min Fang
发明人： Ching-Yung Chen , Fang-Chu Chen , Chih-Chun Feng , Ce-Min Fang
IPC分类号： H04N11/02
CPC分类号： H04H40/18
摘要： A system for receiving a digital broadcast includes an input terminal that receives the digital broadcast containing scalable data, and a controller for controlling an operation mode of the system. In addition, the system may also include a processor that decodes the data, and a power management device that varies the amount of data to be decoded according to the operation mode.
摘要翻译：用于接收数字广播的系统包括：接收包含可伸缩数据的数字广播的输入终端;以及用于控制系统的操作模式的控制器。此外，系统还可以包括对数据进行解码的处理器，以及根据操作模式改变要解码的数据量的电源管理装置。

7. 发明授权

US07379507B2 Method and device for modulation recognition of digitally modulated signals with multi-level magnitudes 有权
标题翻译：用于多电平量程数字调制信号调制识别的方法和装置
公开(公告)号：US07379507B2
公开(公告)日：2008-05-27
申请号：US10956603
申请日：2004-10-01
申请人： Ching-Yung Chen , Chih-Chun Feng
发明人： Ching-Yung Chen , Chih-Chun Feng
IPC分类号： H04B7/02
CPC分类号： H04L27/0012 , H04B1/0003 , H04L27/0008
摘要： A modulation recognition method and device for digitally modulated signals with multi-level magnitudes are provided. The modulation recognition method includes selecting plural quantization sizes used to construct plural statistic histograms related to the magnitude of a sequence of data, setting up an off-line processing to extract plural useful feature patterns for each modulation type of interest, receiving a sequence of samples of a modulated object signal and constructing plural statistic histograms related to the magnitude of these samples, and adopting a hierarchical classification method for modulation recognition. It can be applied to the adaptive-modulation communication system, software defined radio, digital broadcasting systems and military communication systems. It can also be integrated with modulation recognition techniques for other types of modulated signals to function in a universal demodulator. It recognizes digitally modulated signals of multi-level magnitudes with low computational complexity in advancing the efficiency of communication systems.
摘要翻译：提供了一种具有多级数值的数字调制信号的调制识别方法和装置。调制识别方法包括：选择多个量化大小，用于构建与数据序列的幅度有关的多个统计直方图，设置离线处理以提取每个感兴趣的调制类型的多个有用特征图案，接收样本序列并构造与这些样本的幅度有关的多个统计直方图，并采用分层分类方法进行调制识别。它可以应用于自适应调制通信系统，软件定义无线电，数字广播系统和军事通信系统。它也可以与用于其他类型的调制信号的调制识别技术集成在通用解调器中起作用。它在提高通信系统效率的同时，以低计算复杂度识别多电平量级的数字调制信号。

8. 发明授权

US07342978B2 Method and apparatus for PAPR reduction of an OFDM signal 有权
标题翻译： OFDM信号的PAPR降低的方法和装置
公开(公告)号：US07342978B2
公开(公告)日：2008-03-11
申请号：US10859758
申请日：2004-06-02
申请人： Chih-Chun Feng , Chih-Yaw Wang
发明人： Chih-Chun Feng , Chih-Yaw Wang
IPC分类号： H04L27/00 , H04L25/03 , H04J11/00
CPC分类号： H04L27/2621 , H04L27/2614
摘要： An apparatus and a method for peak-to-average power ratio reduction of an OFDM signal are disclosed. The method uses the interleaved characteristics of partial transmit sequences to partition input data x[n] of length N into several disjoint subblocks in time domain, and a complete N-point signal {tilde over (x)}[n] is composed after phase optimization, where N is the length of an OFDM signal and n=0, 1, . . . , N−1. Accordingly, the apparatus comprises an N-point inverse fast Fourier transform (N-IFFT), a de-multiplexer, a combiner, a set of memory and an adder. This invention uses only one N-IFFT, whereby it can achieve significant computation reduction. This invention requires (N/2)log2 N complex multiplications and N memory units. It also preserves the inherent property as well as advantages of an OFDM system.
摘要翻译：公开了一种用于OFDM信号的峰均功率比降低的装置和方法。该方法采用部分发送序列的交织特性，将长度为N的输入数据x [n]划分成时域中的多个不相交的子块，完成N点信号x [n]在相位优化后构成，其中N为 OFDM信号的长度，n = 0,1，...。。。，N-1。因此，该装置包括N点快速傅里叶逆变换（N-IFFT），解复用器，组合器，一组存储器和加法器。本发明仅使用一个N-IFFT，从而可以实现显着的计算减少。本发明需要（N / 2）对数N 2个复乘法和N个存储器单元。它还保留了OFDM系统的内在特性和优点。

9. 发明授权

US07336600B2 Cell search method for orthogonal frequency division multiplexing based cellular communication system 有权
标题翻译：基于蜂窝通信系统的正交频分复用的小区搜索方法
公开(公告)号：US07336600B2
公开(公告)日：2008-02-26
申请号：US10748550
申请日：2003-12-29
申请人： Chih-Chun Feng , Yung-Hua Hung , Chun-Hung Liu
发明人： Chih-Chun Feng , Yung-Hua Hung , Chun-Hung Liu
IPC分类号： H04J11/00
CPC分类号： H04L27/2655 , H04J11/0069 , H04L5/0021 , H04L27/2613 , H04L27/2656 , H04L27/2662
摘要： A method for synchronizing and identifying the cell code (scrambling code) of a cell in an orthogonal frequency division multiplexing (OFDM) based cellular communication system is provided. In this method, desired cell is found by utilizing a frame structure of OFDM symbols and through a corresponding cell search procedure, where the frame structure has periodic signal pattern and contains the information about the cell code of the desired cell in common pilot channel (CPICH) signal. And, the cell search method utilizes the periodic property of the frame structure to detect frame timing, and the correlation property of CPICH signal to identify the cell code. The cell search method of the present invention offers the advantages of good link quality, fast acquisition, and low power consumption.
摘要翻译：提供了一种在基于正交频分复用（OFDM）的蜂窝通信系统中同步和识别小区的小区码（扰码）的方法。在该方法中，通过利用OFDM符号的帧结构并通过相应的小区搜索过程找到所需小区，其中帧结构具有周期性信号模式，并且在公共导频信道（CPICH）中包含关于期望小区的小区码的信息）信号。并且，小区搜索方法利用帧结构的周期属性来检测帧定时，以及CPICH信号的相关性以识别小区码。本发明的小区搜索方法具有良好的链路质量，快速采集和低功耗的优点。

10. 发明申请

US20050286648A1 Method and apparatus for high-order PAPR reduction of an OFDM signal 有权
标题翻译：用于OFDM信号的高阶PAPR降低的方法和装置
公开(公告)号：US20050286648A1
公开(公告)日：2005-12-29
申请号：US10925462
申请日：2004-08-24
申请人： Chih-Chun Feng , Chih-Yaw Wang
发明人： Chih-Chun Feng , Chih-Yaw Wang
IPC分类号： H04J11/00 , H04K1/10 , H04L27/26 , H04L27/28
CPC分类号： H04L27/2621
摘要： A method and apparatus for high-order peak-to-average power ratio reduction of an OFDM signal are disclosed. The method partitions time-domain input data x[n] of length N into M disjoint subblocks in time domain, and a complete N-point transmitted signal {tilde over (x)}[n], n=0, 1, . . . , N−1, is composed after transformation, complex multiplication, and phase optimization, where M is a power of 2, M≧8 and N/M>1 is an integer. Accordingly, the apparatus comprises an N-point inverse fast Fourier transform (N-IFFT), a de-multiplexer, a transformer, two sets of memories, a plurality of complex multipliers, and an adder. This invention uses only one N-IFFT, whereby it achieves significant computation reduction. As M=8, the number of complex multiplications and that of memory units required are less than or equal to (N/2)log2N+(3N/4) and 3N/2, respectively. The invention also preserves the inherent property as well as advantages of an OFDM system.
摘要翻译：公开了一种用于OFDM信号的高阶峰值与平均功率比降低的方法和装置。该方法将长度为N的时域输入数据x [n]分为时域中的M个不相交的子块，以及完整的N点发送信号x [n]，n = 0,1。。。 N-1是在变换，复数乘法和相位优化之后组成的，其中M是2的幂，M> = 8，N / M> 1是整数。因此，该装置包括N点快速傅里叶逆变换（N-IFFT），解复用器，变压器，两组存储器，多个复数乘法器和加法器。本发明仅使用一个N-IFFT，从而实现显着的计算减少。在M = 8时，复乘次数和所需存储器单元的数目分别小于或等于（N / 2）log 2 N +（3 N / 4）和3 N / 2。本发明还保留了OFDM系统的固有特性和优点。

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