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1. 发明授权

US07266749B1 Trellis construction based on parity check matrix for BCH code 失效
标题翻译：基于BCH码奇偶校验矩阵的网格构建
公开(公告)号：US07266749B1
公开(公告)日：2007-09-04
申请号：US10186128
申请日：2002-06-27
申请人： Yan Zhong , Lin Yang
发明人： Yan Zhong , Lin Yang
IPC分类号： H04L1/14
CPC分类号： H03M13/152 , H03M13/3944 , H04L1/0058
摘要： A method for constructing a simplified trellis diagram for BCH-encoded information is disclosed. BCH-encoded information is received, having a corresponding parity check matrix H. The parity check matrix H is expressed as an ordered sequence of columns of matrices. A sequence of sub-code words is provided, corresponding to one or more code words, each satisfying a given condition. A matrix Hcp, having columns that are generated as a selected permutation of the columns of the matrix H through a column-permutation-for-binary-matching process, is provided, and a sequence of sub-matrices and a corresponding sequence of permuted sub-code words is provided. A trellis diagram, representing an ordered sequence of code word transitions in the received information and symmetric about a central location, is provided for each code word c, connecting n+1 stages, numbered i=0, 1, . . . , n, in an ordered sequence.
摘要翻译：公开了一种用于构建BCH编码信息的简化网格图的方法。 BCH编码信息被接收，具有对应的奇偶校验矩阵H.奇偶校验矩阵H表示为矩阵列的有序序列。提供一个子代码字序列，对应于一个或多个代码字，每个代码字都满足给定条件。提供了具有通过列置换二进制匹配处理作为矩阵H的列的选择排列生成的列的矩阵H pc，提供矩阵和相应的排列子码字序列。对于每个代码字c，提供了连接n + 1个阶段（编号为i = 0,1）的格子图，表示接收到的信息中的码字转换的有序序列并且关于中心位置对称的格状图。。。，n，有序序列。

2. 发明授权

US07724833B2 Receiver for an LDPC based TDS-OFDM communication system 失效
标题翻译：用于基于LDPC的TDS-OFDM通信系统的接收机
公开(公告)号：US07724833B2
公开(公告)日：2010-05-25
申请号：US11740712
申请日：2007-04-26
申请人： Lin Yang , Dinesh Venkatachalam
发明人： Lin Yang , Dinesh Venkatachalam
IPC分类号： H04L27/28
CPC分类号： H04L27/2647 , H04L1/0045 , H04L1/0057 , H04L25/0202 , H04L27/2656 , H04L2025/03414
摘要： An LDPC based TDS-OFDM receiver for demodulating an LDPC encoded TDS-OFDM modulated RF signal downconverted to an IF signal includes a synchronization block, an equalization block, an OFDM demodulation block and a FEC decoder block. The synchronization block generates a baseband signal from a digitized IF signal and performs correlation of a PN sequence in a signal frame of the received RF signal with a corresponding locally generated PN sequence to provide signals for performing carrier recovery, timing recovery and parameters for channel estimation. The equalization block performs channel estimation and channel equalization. The OFDM demodulation block performs demodulation on the baseband signal to recover OFDM symbols and converts the OFDM symbols to frequency domain. The FEC decoder block includes an LDPC decoder for decoding the OFDM symbols based on the LDPC code to generate a digital output signal indicative of the data content of the RF signal.
摘要翻译：用于解调下变频到IF信号的LDPC编码的TDS-OFDM调制RF信号的基于LDPC的TDS-OFDM接收机包括同步块，均衡块，OFDM解调块和FEC解码器块。同步块从数字化IF信号产生基带信号，并且执行接收的RF信号的信号帧中的PN序列与相应的本地生成的PN序列的相关性，以提供用于执行载波恢复，定时恢复和用于信道估计的参数的信号。均衡块执行信道估计和信道均衡。 OFDM解调块对基带信号进行解调以恢复OFDM符号，并将OFDM符号转换为频域。 FEC解码器块包括LDPC解码器，用于基于LDPC码解码OFDM符号，以产生指示RF信号的数据内容的数字输出信号。

3. 发明授权

US07324428B1 Frame identifier 失效
标题翻译：帧标识符
公开(公告)号：US07324428B1
公开(公告)日：2008-01-29
申请号：US10040185
申请日：2001-10-19
申请人： Haiyun Yang
发明人： Haiyun Yang
IPC分类号： H04J11/00 , H04J3/14 , H04L12/28
CPC分类号： H04L27/2656 , H04L5/026 , H04L27/2613
摘要： Method and system for determining the number of one or more of a sequence of M+1 consecutive OFDM frames from analysis of the designated preambles of two or more consecutive frames (m=0, 1, . . . , M; M≧1). An overlap function OF(m;k) is formed for each frame with a sequence of selected reference signals indexed by k (k=1, 2, . . . , K), dependent upon the frame number m and the index k, and a phase (sequence location corresponding to largest amplitude of overlap function) is determined. An Mth-order phase difference is computed that corresponds to frame number of one of the M+1 frames. A consistency check is provided for the phase numbers.
摘要翻译：用于从两个或更多个连续帧（m = 0,1，...，M; M> = 1）的指定前同步码的分析中确定M + 1个连续OFDM帧序列中的一个或多个序列的数目的方法和系统）。根据帧数m和索引k，由k（k = 1,2，...，K）索引的所选择的参考信号序列为每个帧形成重叠函数OF（m; k），并且确定相位（对应于最大幅度的重叠函数的序列位置）。计算对应于M + 1帧中的一个帧的帧号的M阶相位差。对相数进行一致性检查。

4. 发明授权

US06996192B1 Adapted phase noise estimation and compensation 失效
标题翻译：适应相位噪声估计和补偿
公开(公告)号：US06996192B1
公开(公告)日：2006-02-07
申请号：US10359430
申请日：2003-02-05
申请人： Qin Liu , Lin Yang
发明人： Qin Liu , Lin Yang
IPC分类号： H04L27/06
CPC分类号： H04L27/2657 , H04L27/2675 , H04L27/2695
摘要： Method and system for adaptively estimating and compensating for phase noise error in a received signal s(t;data). A plurality of transmission parameter symbol (TPS) sets, each with a representative TPS group frequency, are incorporated in the signal before transmission. Received channel response amplitudes are analyzed to select a particular TPS frequency group, and inverse Fourier transforms, N(t) and D(t), are computed for these chosen signals. A complex ratio, r(t)=N(t)/D(t), is computed and used to determine a phase angle φ(t). A phase noise error compensated, time domain signal, equal to exp{−jφ(t)}·s(t−Δt(delay);data) is provided.
摘要翻译：用于自适应地估计和补偿接收信号s（t;数据）中的相位噪声误差的方法和系统。具有代表性的TPS组频率的多个传输参数符号（TPS）集合被并入传输之前的信号中。分析接收的信道响应幅度以选择特定的TPS频率组，并且为这些选择的信号计算反傅立叶变换N（t）和D（t）。计算复数比r（t）= N（t）/ D（t）并用于确定相位角phi（t）。提供相位噪声误差补偿，时域信号等于exp {-jphi（t.s（t-Deltat（delay）; data）。

5. 发明授权

US06898757B1 Decoding multi-block product code 失效
标题翻译：解码多块产品代码
公开(公告)号：US06898757B1
公开(公告)日：2005-05-24
申请号：US10117388
申请日：2002-04-04
申请人： Yan Zhong , Lin Yang
发明人： Yan Zhong , Lin Yang
IPC分类号： H03M13/25 , H03M13/29 , H04L1/00 , H04L27/34 , H03M13/03
CPC分类号： H04L1/0057 , H03M13/251 , H03M13/2909 , H04L1/0045 , H04L27/3488
摘要： A method for efficient decoding of block product code format signals, using a (22p)QAM signal constellation for mapping of a received signal, with p=2, 3, 4, 5, . . . A received signal value rx, corresponding to an x=I or x=Q coordinate, is converted to a p-tuple (B(p-1)x, . . . , B0x) corresponding to a “closest” I-coordinate or Q-coordinate numerical value, and a p-stage algorithm is applied to the signal values rx and to the p-tuples (B(p-1)x, . . . , B0x) to determine a p-tuple (r(p-1)x, . . . , r0x) representing a decoded p-bit value for the received signal value rx. Depending upon a communication channel parameter Eb/N0 and the bit error ratio BER associated with each of the p bits, the received signal values rx may be suitable for some or all communications activities (e.g., HDTV, SDTV, mobile comm).
摘要翻译：使用用于映射接收到的信号的（2≤Pp）QAM信号星座来对块产品码格式信号进行有效解码的方法，其中p = 2,3,4,5，...。。。对应于x = I或x = Q坐标的接收信号值r x x x被转换成p元组（B（p-1）x）。对应于“最接近”的I坐标或Q坐标数值的P阶算法，并且将p级算法应用于信号值r x1 / 以及p元组（B＆gt;（p-1）x，...，B×0x））来确定p元组（r∈（p-1） 1）表示用于接收信号值r x x的解码的p位值的x，...，r 。根据通信信道参数Eb / N0和与每个p位相关联的比特误差BER，接收信号值r x x可适用于一些或所有通信活动（例如，HDTV， SDTV，手机通讯）。

6. 发明授权

US07170944B1 Iterative assessment of multipath signal presence 失效
标题翻译：多径信号存在的迭代评估
公开(公告)号：US07170944B1
公开(公告)日：2007-01-30
申请号：US10291154
申请日：2002-11-07
申请人： Qin Liu , Lin Yang
发明人： Qin Liu , Lin Yang
IPC分类号： H04L27/28 , H04J11/00
CPC分类号： H04L25/03006 , H04B1/7113 , H04L25/0202 , H04L27/261 , H04L2025/03598
摘要： Method and system for determining whether one or more multipath signals is present in a received signal frame that includes a reference symbol (RS) sequence RS(t;m1) as part of the frame, and for iteratively evaluating a multipath signal that is present. The RS sequence index (m1) for the frame is identified, and first and second Fourier transforms Φ(f;m1;ref) and Φ(f;rec) for the received frame are provided for a selected time segment IS that includes the RS sequence of the received frame. An inverse Fourier transform σ(t;m1) of the ratio of the transforms is computed and analyzed. If at least one multipath signal is present, σ(t;m1) is nonlinearly filtered, and the filtered function is convolved with RS(t;m1). This convolution represents a received signal extension, due to multipath signal(s) presence. A refinement procedure analyzes a contribution to multipath signals from the preceding frame(s). The procedure is iteratively driven toward an optimal representation of any multipath signal(s) present.
摘要翻译：用于确定在包括作为帧的一部分的参考符号（RS）序列RS（t; m 1）的接收信号帧中是否存在一个或多个多径信号的方法和系统，并且用于迭代地评估存在的多径信号。识别该帧的RS序列索引（m 1），并且为所选择的时间段IS提供接收帧的第一和第二傅里叶变换Phi（f; m 1; ref）和Phi（f; rec）接收帧的RS序列。计算和分析变换比率的傅立叶逆变换Σ（t; m 1）。如果存在至少一个多径信号，则σ（t; m 1）被非线性滤波，滤波后的函数与RS（t; m 1）卷积。由于多路径信号存在，该卷积表示接收到的信号扩展。细化程序分析对来自前一帧的多路径信号的贡献。该过程被迭代地驱动到存在的任何多径信号的最佳表示。

7. 发明申请

US20080025424A1 Receiver For An LDPC based TDS-OFDM Communication System 失效
标题翻译：用于基于LDPC的TDS-OFDM通信系统的接收机
公开(公告)号：US20080025424A1
公开(公告)日：2008-01-31
申请号：US11740712
申请日：2007-04-26
申请人： Lin Yang , Dinesh Venkatachalam
发明人： Lin Yang , Dinesh Venkatachalam
IPC分类号： H04B1/69
CPC分类号： H04L27/2647 , H04L1/0045 , H04L1/0057 , H04L25/0202 , H04L27/2656 , H04L2025/03414
摘要： An LDPC based TDS-OFDM receiver for demodulating an LDPC encoded TDS-OFDM modulated RF signal downconverted to an IF signal includes a synchronization block, an equalization block, an OFDM demodulation block and a FEC decoder block. The synchronization block generates a baseband signal from a digitized IF signal and performs correlation of a PN sequence in a signal frame of the received RF signal with a corresponding locally generated PN sequence to provide signals for performing carrier recovery, timing recovery and parameters for channel estimation. The equalization block performs channel estimation and channel equalization. The OFDM demodulation block performs demodulation on the baseband signal to recover OFDM symbols and converts the OFDM symbols to frequency domain. The FEC decoder block includes an LDPC decoder for decoding the OFDM symbols based on the LDPC code to generate a digital output signal indicative of the data content of the RF signal.
摘要翻译：用于解调下变频到IF信号的LDPC编码的TDS-OFDM调制RF信号的基于LDPC的TDS-OFDM接收机包括同步块，均衡块，OFDM解调块和FEC解码器块。同步块从数字化IF信号产生基带信号，并且执行接收的RF信号的信号帧中的PN序列与相应的本地生成的PN序列的相关性，以提供用于执行载波恢复，定时恢复和用于信道估计的参数的信号。均衡块执行信道估计和信道均衡。 OFDM解调块对基带信号进行解调以恢复OFDM符号，并将OFDM符号转换为频域。 FEC解码器块包括LDPC解码器，用于基于LDPC码解码OFDM符号，以产生指示RF信号的数据内容的数字输出信号。

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