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1. 发明申请

US20100056082A1 COMMUNICATION SYSTEM WITH FREQUENCY-ADAPTIVE PREDISTORTER DESIGN 有权
标题翻译：具有频率自适应预测器设计的通信系统
公开(公告)号：US20100056082A1
公开(公告)日：2010-03-04
申请号：US12198126
申请日：2008-08-26
申请人： Mao-Ching Chiu , Wei-Ping Chuang
发明人： Mao-Ching Chiu , Wei-Ping Chuang
IPC分类号： H04B1/04 , H03F1/26
CPC分类号： H04L27/368 , H03F1/3241 , H03F1/3247 , H03F1/3282 , H03F2201/3233 , H04B17/0085 , H04B17/21 , H04B2001/0425
摘要： A communication system comprises a predistorter for distorting an input signal according to at least one parameter to generate a distorted signal, an amplifier for amplifying the distorted signal according to an input-output characteristic to generate an output signal, and a frequency-domain adaptive calibration module for adaptively adjusting the parameter of the predistorter according to a frequency characteristic of the output signal. Because the calibration is performed in the frequency domain, there is no need to precisely estimate the group delay formed by the feedback path. The system complexity is therefore reduced without loss of performance.
摘要翻译：通信系统包括用于根据至少一个参数使输入信号失真以产生失真信号的预失真器，用于根据输入 - 输出特性放大失真信号以产生输出信号的放大器，以及频域自适应校准模块，用于根据输出信号的频率特性自适应地调整预失真器的参数。因为在频域中执行校准，所以不需要精确地估计由反馈路径形成的组延迟。因此，系统复杂度降低而不会损失性能。

2. 发明授权

US07298793B2 Method and apparatus for I/Q mismatch calibration of transmitter 有权
标题翻译：发射机I / Q不匹配校准的方法和装置
公开(公告)号：US07298793B2
公开(公告)日：2007-11-20
申请号：US10645107
申请日：2003-08-21
申请人： Kuo-Ming Wu , Mao-Ching Chiu , Jui-Hsi Cheng
发明人： Kuo-Ming Wu , Mao-Ching Chiu , Jui-Hsi Cheng
IPC分类号： H04K1/02 , H04L25/03 , H04L25/49
CPC分类号： H04L27/364 , H04L27/2626
摘要： A method for I/Q mismatch calibration of a transmitter. First, a discrete-time signal is generated. Next, a corrected signal based on the discrete-time signal and a set of correction parameters Ap and Bp is obtained. Next, the corrected signal is converted to an analog corrected signal. Next, I/Q modulation is applied to the analog corrected signal and outputs a modulated signal. Next, a first, second, and third desired component measures and a first, second, and third image component measures with the first, second and third sets of the correction parameters Ap and Bp are respectively obtained from the modulated signal. Next, a fourth and fifth set of correction parameters Ap and Bp are obtained based on the first, the second, and the third desired component measures as well as the first, the second, and the third image component measures. Next, a fourth desired component measure and a fourth image component measure with the fourth set of correction parameters Ap and Bp and a fifth desired component measure and a fifth image component measure with the fifth set of correction parameters Ap and Bp are obtained from the modulated signal. Finally, a final set of the correction parameters Ap and Bp are selected from the fourth and fifth sets of correction parameters.
摘要翻译：一种用于发射机的I / Q不匹配校准的方法。首先，产生离散时间信号。接下来，获得基于离散时间信号的校正信号和一组校正参数A＆lt; P＆gt;和B＆lt; P＆lt; 接下来，将校正后的信号转换为模拟校正信号。接下来，将I / Q调制应用于模拟校正信号并输出调制信号。接下来，第一，第二和第三期望分量测量以及第一，第二和第三图像分量测量第一，第二和第三组校正参数A P和P P 分别从调制信号获得。接下来，基于第一，第二和第三所需分量测量以及第一和第三组的第一和第三组的校正参数A P和P P ，第二和第三图像分量测量。接下来，使用第四组校正参数A P和P P以及第五期望分量测量值和第五图像分量测量第四期望分量测量值和第四图像分量测量值从调制信号获得具有第五组校正参数A＆lt; P＆gt;和B＆gt; P＆lt; P＆gt;的测量。最后，从第四组和第五组校正参数中选择最后一组校正参数A P和/或P 。

3. 发明授权

US07218628B2 Method and device for detecting preamble of wireless data frame 有权
标题翻译：用于检测无线数据帧前导码的方法和装置
公开(公告)号：US07218628B2
公开(公告)日：2007-05-15
申请号：US10209489
申请日：2002-07-29
申请人： Mao-Ching Chiu , Chu-Ming Lin , Po-Hung Chen , Chin-Wen Lin , Tai-Yuan Cheng
发明人： Mao-Ching Chiu , Chu-Ming Lin , Po-Hung Chen , Chin-Wen Lin , Tai-Yuan Cheng
IPC分类号： H04J3/24
CPC分类号： H04W99/00 , H04L7/042
摘要： A method and a device for detecting a preamble type of a wireless data frame are provided. The preamble has a synchronization (SYNC) field and a start frame delimiter (SFD) field, and the method comprises following steps. The wireless data frame is first received, and then determined whether the wireless data frame has a short preamble. When the wireless data frame has the short preamble, the wireless data frame is transmitted to a MAC device. In addition, if the wireless data frame does not have the short preamble, it determines whether the wireless data frame has a long preamble. When the wireless data frame has the long preamble, the wireless data frame is then transmitted to the MAC device.
摘要翻译：提供了一种用于检测无线数据帧的前同步码类型的方法和装置。前导码具有同步（SYNC）字段和起始帧分隔符（SFD）字段，并且该方法包括以下步骤。首先接收无线数据帧，然后确定无线数据帧是否具有短前导码。当无线数据帧具有短前导码时，无线数据帧被发送到MAC设备。此外，如果无线数据帧不具有短前导码，则它确定无线数据帧是否具有长前导码。当无线数据帧具有长的前导码时，无线数据帧然后被发送到MAC设备。

4. 发明申请

US20050047524A1 Apparatus and method for calculating bit metrics in data receivers 有权
标题翻译：用于计算数据接收器中比特度量的装置和方法
公开(公告)号：US20050047524A1
公开(公告)日：2005-03-03
申请号：US10653279
申请日：2003-09-02
申请人： Mao-Ching Chiu , Chi-Chao Chao
发明人： Mao-Ching Chiu , Chi-Chao Chao
IPC分类号： H04L25/06 , H04L27/06
CPC分类号： H04L25/067
摘要： An apparatus and method for calculating bit metrics in data receivers. The apparatus of the invention includes a storage unit and a calculator. The storage unit is configured to store a number of modulation-dependent coefficients; it selects as output one of the coefficients in accordance with a modulation mode being used. The calculator receives the selected coefficient from the storage unit and takes a received signal and a channel response in the frequency domain. According to the selected coefficient, the received signal and the channel response, the calculator generates at least N number of bit metrics for an N-bit codeword in the received signal.
摘要翻译：一种用于计算数据接收器中的比特度量的装置和方法。本发明的装置包括存储单元和计算器。存储单元被配置为存储多个与调制有关的系数; 它根据正在使用的调制模式选择系数中的一个输出。计算器从存储单元接收所选择的系数，并在频域中接收接收的信号和信道响应。根据所选择的系数，接收到的信号和信道响应，计算器生成接收信号中的N比特码字的至少N个比特度量。

5. 发明申请

US20050031028A1 Method and apparatus for estimating the link quality of a communication channel 有权
标题翻译：用于估计通信信道的链路质量的方法和装置
公开(公告)号：US20050031028A1
公开(公告)日：2005-02-10
申请号：US10632902
申请日：2003-08-04
申请人： Mao-Ching Chiu
发明人： Mao-Ching Chiu
IPC分类号： H04L1/20 , H04L27/26 , H04B3/46
CPC分类号： H04L1/20 , H04L27/2647
摘要： A link quality estimating method and apparatus adopts a fading value to modify an estimated link quality of a channel thereby obtaining a measure being very close to the real link quality. The method is implemented by utilizing two sequentially received long training symbols to derive two sets of subcarrier gain values Hk,1 and Hk,2. Based on the subcarrier gain values Hk,1 and Hk,2, parameters representing the estimated channel gain value (A), the fading value (F) and the noise quantity (B) of the channel are all calculable. With these parameters, the link quality (LQ) of said communication channel is derived.
摘要翻译：链路质量估计方法和装置采用衰落值来修改信道的估计链路质量，从而获得非常接近实际链路质量的度量。该方法通过利用两个顺序接收的长训练符号来实现，以得出两组副载波增益值Hk，1和Hk，2。基于子载波增益值Hk，1和Hk，2，可以计算表示估计的信道增益值（A），衰落值（F）和信道的噪声量（B）的参数。利用这些参数，导出所述通信信道的链路质量（LQ）。

6. 发明申请

US20120314779A1 SUPERIMPOSED NETWORK CODING METHOD 审中-公开
标题翻译：超级网络编码方法
公开(公告)号：US20120314779A1
公开(公告)日：2012-12-13
申请号：US13344017
申请日：2012-01-05
申请人： Wei-Cheng LIU , Mao-Ching CHIU
发明人： Wei-Cheng LIU , Mao-Ching CHIU
IPC分类号： H04B14/04
CPC分类号： H04B7/15521
摘要： A superimposed network coding method, that is applicable to communication in a network, containing a first, a second, and a third network nodes, comprising following steps: firstly, the first network node transmits its first data to the second, and the third network nodes, so that the second and the third network nodes receive corresponding signals; next, the second network node transmits its second data to the first and the third network nodes, so that the first and the third network nodes receive the corresponding signal; then, the third network node superimposes and sums signals received with summation weights to generate a superimposed signal, and transmits it to the first and the second network nodes; finally, the first and the second network nodes delete their own data from signals received, and then demodulate the signals received to obtain the second data and the first data.
摘要翻译：一种适用于包含第一，第二和第三网络节点的网络中的通信的叠加网络编码方法，包括以下步骤：首先，第一网络节点将其第一数据发送到第二网络节点，第三网络节点，使得第二和第三网络节点接收相应的信号; 接下来，第二网络节点将其第二数据发送到第一和第三网络节点，使得第一和第三网络节点接收相应的信号; 然后，第三网络节点将接收的信号与求和权重相加并产生叠加信号，并将其发送到第一和第二网络节点; 最后，第一和第二网络节点从接收到的信号中删除自己的数据，然后解调所接收的信号以获得第二数据和第一数据。

7. 发明申请

US20100203885A1 Method of Performing Cell Search for a Wireless Communications System 有权
标题翻译：执行无线通信系统的小区搜索的方法
公开(公告)号：US20100203885A1
公开(公告)日：2010-08-12
申请号：US12368988
申请日：2009-02-10
申请人： Chao-Yu Chen , Chao-Ming Chang , Kuang-Jen Wang , Mao-Ching Chiu
发明人： Chao-Yu Chen , Chao-Ming Chang , Kuang-Jen Wang , Mao-Ching Chiu
IPC分类号： H04W4/00 , H04L27/06 , H04B1/10
CPC分类号： H04W48/20 , H04J11/0069
摘要： Performing cell search in a wireless communications system includes receiving a preamble signal, match filtering the preamble signal with a pseudo noise sequence to form a filtered preamble signal of a plurality of filtered preamble signals, choosing a largest filtered preamble signal from the plurality of filtered preamble signals, and determining an estimated pseudo noise sequence index and an estimated integer part frequency offset according to the largest filtered preamble signal.
摘要翻译：在无线通信系统中执行小区搜索包括接收前同步信号，将前同步码信号与伪噪声序列进行匹配滤波，以形成多个滤波的前导信号的经滤波的前导信号，从多个滤波的前导码中选择最大滤波的前导信号信号，以及根据最大滤波的前导信号确定估计的伪噪声序列索引和估计的整数部分频率偏移。

8. 发明申请

US20070226598A1 Encoding and decoding methods and systems 有权
标题翻译：编码和解码方法和系统
公开(公告)号：US20070226598A1
公开(公告)日：2007-09-27
申请号：US11489474
申请日：2006-07-20
申请人： Mao-Ching Chiu , Hsiao-Feng Lu
发明人： Mao-Ching Chiu , Hsiao-Feng Lu
IPC分类号： H03M13/03
CPC分类号： H03M13/2972 , H03M13/1197 , H03M13/2939 , H03M13/296 , H04L1/0065
摘要： An encoder for use in information processing applications includes an input configured to provide information bits to be encoded and a feedforward convolutional outer code encoder configured to encode the information bits to generate encoded information bits including the information bits and parity bits. The encoder may also include at least one interleaver configured to interleave the encoded information bits to generate an outer codeword. Further, the encoder may include a rate-1 1/(1+D) accumulate code based inner code encoder configured to encode the outer codeword to generate one or more codewords corresponding to the information bits.
摘要翻译：用于信息处理应用的编码器包括被配置为提供待编码的信息比特的输入端和配置成对信息比特进行编码以产生包括信息比特和奇偶校验比特的编码信息比特的前馈卷积外码编码器。编码器还可以包括被配置为交织编码的信息比特以生成外部码字的至少一个交织器。此外，编码器可以包括基于速率的1 /（1 + D）累积码的内码编码器，其被配置为对外码字进行编码以生成与信息比特相对应的一个或多个码字。

9. 发明授权

US07272108B2 Channel estimation in orthogonal frequency-division multiplexing (OFDM) systems 有权
标题翻译：正交频分复用（OFDM）系统中的信道估计
公开(公告)号：US07272108B2
公开(公告)日：2007-09-18
申请号：US10308513
申请日：2002-12-03
申请人： Kuo Hui Li , Charles Huang , Mao-Ching Chiu , Hung-Kun Chen , Chao-Ming Chang
发明人： Kuo Hui Li , Charles Huang , Mao-Ching Chiu , Hung-Kun Chen , Chao-Ming Chang
IPC分类号： H04J11/00 , H04K1/10 , H04B7/10
CPC分类号： H04L5/0048 , H04B7/0613 , H04L1/0618 , H04L5/0023 , H04L25/0204 , H04L25/0226 , H04L25/0228
摘要： A system and method for estimating channel characteristics in orthogonal frequency-division multiplexing (OFDM) systems with transmitter diversity is presented. The disclosed approach is compatible with the Institute of Electrical and Electronics Engineers (IEEE) “Wireless Local Area Network (LAN) Medium Access Control (MAC) and Physical Layer (PHY) Specification.” In the disclosed system and method, an additional training symbol is transmitted during the data period. This provides additional information that may be used to more accurately estimate channel characteristics.
摘要翻译：提出了一种用于估计具有发射机分集的正交频分复用（OFDM）系统中的信道特性的系统和方法。所公开的方法与电气和电子工程师协会（IEEE）“无线局域网（LAN）媒体接入控制（MAC）和物理层（PHY）规范”兼容。在所公开的系统和方法中，在数据周期期间传送附加的训练符号。这提供了可用于更准确地估计信道特性的附加信息。

10. 发明授权

US07139536B2 Method and apparatus for I/Q imbalance calibration of a transmitter system 有权
标题翻译：用于发射机系统的I / Q不平衡校准的方法和装置
公开(公告)号：US07139536B2
公开(公告)日：2006-11-21
申请号：US10725654
申请日：2003-12-02
申请人： Mao-Ching Chiu
发明人： Mao-Ching Chiu
IPC分类号： H04B11/00
CPC分类号： H03C3/406 , H04B17/11 , H04B17/21
摘要： A method for I/Q imbalance calibration of an OFDM system comprising the steps of initializing parameters Ap, Bp and γp, estimating a loop delay factor L, generating a discrete-time test signal x[n], deriving a signal xcom[n] by compensating the test signal x[n] according to a function with parameters Ap, Bp and γp, converting the signal xcom[n] to an analog signal x(t), applying I/Q modulation to the signal x(t) and outputting a modulated signal xmod(t), obtaining a characteristic signal xc(t) of the modulated signal, obtaining a signal xs[n] by sampling the characteristic signal xc(t) and obtaining statistics U1 and U2 of the signal xs[n], and updating the parameters Ap, Bp and γp respectively by functions of L, U1, U2, and the current values of Ap, Bp and γp.
摘要翻译：一种用于OFDM系统的I / Q不平衡校准的方法，包括以下步骤：初始化参数A，P，P和P，P，P，通过根据具有参数A [n] 将信号x com [n]转换为模拟信号x（t），并且将信号x>，，）））））））））））））））））））））））））））））））对信号x（t）应用I / Q调制并输出调制信号x mod mod（t），获得调制信号x（t）的特征信号x S（t）信号，通过对特征信号x C（t）进行采样并获得统计U 1和U 2，获得信号x N [n] > 2 ，并且更新参数A _{P，B＆gt;和＆lt;＆lt; 分别通过L，U 1，U 2 2的功能和当前的A P ，B＆lt; p＆gt;和γ＆lt; p＆gt;。}

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