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1. 发明申请

US20090238287A1 Method of determining a variable quantization step size for improving channel decoding,method and apparatus of performing channel decoding operation based on a variable quantization step size 有权
标题翻译：确定用于改善信道解码的可变量化步长的方法，基于可变量化步长执行信道解码操作的方法和装置
公开(公告)号：US20090238287A1
公开(公告)日：2009-09-24
申请号：US12311069
申请日：2007-05-17
申请人： Keun-Moo Lee
发明人： Keun-Moo Lee
IPC分类号： H04B14/04 , H04B7/02
CPC分类号： H04L25/067 , H04L5/0023 , H04L27/2647
摘要： A method of determining a variable quantization step size is disclosed. In the method of determining a variable quantization step size, a channel characteristic parameter is obtained in order to calculate a quantization step size (Δ) used in channel decoding. The quantization step size (Δ) is variably determined based on the channel characteristic parameter. Therefore, the method of determining a variable quantization step size may improve channel decoding.
摘要翻译：公开了一种确定可变量化步长的方法。在确定可变量化步长的方法中，获得信道特征参数，以便计算在信道解码中使用的量化步长（Delta）。基于信道特性参数可变地确定量化步长（Delta）。因此，确定可变量化步长的方法可以改善信道解码。

2. 发明授权

US08223868B2 Method of determining a variable quantization step size for improving channel decoding, method and apparatus of performing channel decoding operation based on a variable quantization step size 有权
标题翻译：确定用于改善信道解码的可变量化步长的方法，基于可变量化步长执行信道解码操作的方法和装置
公开(公告)号：US08223868B2
公开(公告)日：2012-07-17
申请号：US12311069
申请日：2007-05-17
申请人： Keun-Moo Lee
发明人： Keun-Moo Lee
IPC分类号： H04B7/02 , H04L1/02 , H04L5/12 , H04L23/02
CPC分类号： H04L25/067 , H04L5/0023 , H04L27/2647
摘要： A method of determining a variable quantization step size is disclosed. In the method of determining a variable quantization step size, a channel characteristic parameter is obtained in order to calculate a quantization step size (Δ) used in channel decoding. The quantization step size (Δ) is variably determined based on the channel characteristic parameter. Therefore, the method of determining a variable quantization step size may improve channel decoding.
摘要翻译：公开了一种确定可变量化步长的方法。在确定可变量化步长的方法中，获得信道特征参数，以便计算在信道解码中使用的量化步长（＆Dgr）。基于信道特性参数可变地确定量化步长（＆Dgr）。因此，确定可变量化步长的方法可以改善信道解码。

3. 发明申请

US20100054319A1 OFDM WIRELESS MOBILE COMMUNICATION SYSTEM AND METHOD FOR ESTIMATING SNR OF CHANNEL THEREOF 有权
标题翻译： OFDM无线移动通信系统及估计其通道信噪比的方法
公开(公告)号：US20100054319A1
公开(公告)日：2010-03-04
申请号：US12515853
申请日：2007-11-29
申请人： Keun-Moo Lee
发明人： Keun-Moo Lee
IPC分类号： H04B17/00
CPC分类号： H04L5/0007 , H04B1/1036 , H04L27/2647
摘要： In a method for estimating a signal-to-noise ratio (SNR) of an orthogonal frequency division multiplexing (OFDM) wireless mobile communication system, noise is estimated from adjacent received signals of at least two adjacent subcarriers and received signals of subcarriers, noise power is calculated by calculating a mean square value of the estimated noise by summing squares of the estimated noise, a mean square value of the received signals is calculated by summing squares of the received signals, signal power is calculated by subtracting the noise power from the mean square value of the received signals, and the SNR is calculated using the signal power and the noise power. Thus, the method of the present invention having low complexity can estimate an SNR efficiently regardless of channel changes on a frequency axis when one OFDM symbol includes preamble data.
摘要翻译：在用于估计正交频分复用（OFDM）无线移动通信系统的信噪比（SNR）的方法中，从至少两个相邻子载波的相邻接收信号和子载波的接收信号，噪声功率通过用估计噪声的平方和求和估计噪声的均方值来计算估计噪声的均方值，通过对接收到的信号的平方进行求和来计算接收信号的均方值，通过从平均值中减去噪声功率来计算信号功率接收信号的平方值，使用信号功率和噪声功率计算SNR。因此，当一个OFDM符号包括前导码数据时，具有低复杂度的本发明的方法可以有效地估计SNR，而不管频率轴上的信道变化如何。

4. 发明授权

US08254434B2 OFDM wireless mobile communication system and method for estimating SNR of channel thereof 有权
标题翻译： OFDM无线移动通信系统及其信道SNR估计方法
公开(公告)号：US08254434B2
公开(公告)日：2012-08-28
申请号：US12515853
申请日：2007-11-29
申请人： Keun-Moo Lee
发明人： Keun-Moo Lee
IPC分类号： H04B3/46
CPC分类号： H04L5/0007 , H04B1/1036 , H04L27/2647
摘要： In a method for estimating a signal-to-noise ratio (SNR) of an orthogonal frequency division multiplexing (OFDM) wireless mobile communication system, noise is estimated from adjacent received signals of at least two adjacent subcarriers and received signals of subcarriers, noise power is calculated by calculating a mean square value of the estimated noise by summing squares of the estimated noise, a mean square value of the received signals is calculated by summing squares of the received signals, signal power is calculated by subtracting the noise power from the mean square value of the received signals, and the SNR is calculated using the signal power and the noise power. Thus, the method of the present invention having low complexity can estimate an SNR efficiently regardless of channel changes on a frequency axis when one OFDM symbol includes preamble data.
摘要翻译：在用于估计正交频分复用（OFDM）无线移动通信系统的信噪比（SNR）的方法中，从至少两个相邻子载波的相邻接收信号和子载波的接收信号，噪声功率通过用估计噪声的平方和求和估计噪声的均方值来计算估计噪声的均方值，通过对接收到的信号的平方进行求和来计算接收信号的均方值，通过从平均值中减去噪声功率来计算信号功率接收信号的平方值，使用信号功率和噪声功率计算SNR。因此，当一个OFDM符号包括前导码数据时，具有低复杂度的本发明的方法可以有效地估计SNR，而不管频率轴上的信道变化如何。

5. 发明授权

US06442729B1 Convolution code generator and digital signal processor which includes the same 有权
标题翻译：卷积码发生器和数字信号处理器包括相同的
公开(公告)号：US06442729B1
公开(公告)日：2002-08-27
申请号：US09323223
申请日：1999-06-01
申请人： Jae-Yeol Kim , Keun-Moo Lee , Jin-Hyuk Yang , Chong-Min Kyung , Yong-Hoon Lee
发明人： Jae-Yeol Kim , Keun-Moo Lee , Jin-Hyuk Yang , Chong-Min Kyung , Yong-Hoon Lee
IPC分类号： H03M1303
CPC分类号： H03M13/23
摘要： A convolution code generator according to the present invention simultaneously generates convolution codes with respect to input data word by word when a digital signal processor in which the convolution code generator can be installed has a bus configuration of a broad data width. The convolution code generator, which generates an (n, k, m) convolution code, wherein n is a code word length, k is a message block length, and m is a memory block, includes: a temporary data storing unit for temporarily storing input data of a word of a predetermined data width consisting of a plurality of bits, the temporary data storing unit including cells of a first group corresponding to a word and m−1 cells of a second group; and a plurality of exclusive logic operation units selectively connected to the cells of the first and second groups for generating the (n, k, m) convolution code with respect to input bits stored in the cells, wherein a part of data of a previous word is stored in the cells of the second group with respect to a present word stored in the cells of the first group. Also, according to the present invention, there is provided a digital signal processor including the convolution code generator.
摘要翻译：当可以安装卷积码发生器的数字信号处理器具有宽数据宽度的总线配置时，根据本发明的卷积码发生器同时产生一个关于输入数据的卷积码。卷积码生成器生成（n，k，m）卷积码，其中n是码字长度，k是消息块长度，m是存储块，包括：临时数据存储单元，用于临时存储包括由多个比特组成的预定数据宽度的单词的输入数据，所述临时数据存储单元包括对应于单词的第一组的单元和第二组的m-1个单元; 以及选择性地连接到第一和第二组的单元的多个排他逻辑运算单元，用于相对于存储在单元格中的输入比特生成（n，k，m）卷积码，其中前一个单词的数据的一部分相对于存储在第一组的单元中的当前字存储在第二组的单元中。此外，根据本发明，提供了一种包括卷积码发生器的数字信号处理器。

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