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公开(公告)号：US20110041032A1
公开(公告)日：2011-02-17
申请号：US12674492
申请日：2008-08-19
申请人： Young Gil Kim , Norman C. Beaulieu
发明人： Young Gil Kim , Norman C. Beaulieu
CPC分类号： H03M13/1125 , H03M13/6502
摘要： Two hybrid message decoders for low-density parity-check (LDPC) codes are proposed. One decoder uses a posteriori probability ratio (APPR) and a posteriori probability difference (APPD), and the other decoder uses a logarithm a posteriori probability ratio (LAPPR) and a logarithm a posteriori probability difference (LAPPD) as hybrid message. Since the variable node and check node processing can be readily done using APPR and APPD, respectively, the proposed decoders have lower complexity than the conventional decoder that uses LAPPR only as a message.
摘要翻译： 提出了用于低密度奇偶校验（LDPC）码的两个混合消息解码器。 一个解码器使用后验概率比（APPR）和后验概率差（APPD），另一解码器使用对数后验概率比（LAPPR）和对数后验概率差（LAPPD）作为混合消息。 由于可以使用APPR和APPD分别容易地完成变量节点和校验节点处理，因此所提出的解码器比仅使用LAPPR作为消息的常规解码器具有更低的复杂度。
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公开(公告)号：US08464126B2
公开(公告)日：2013-06-11
申请号：US12674492
申请日：2008-08-19
申请人： Young Gil Kim , Norman C. Beaulieu
发明人： Young Gil Kim , Norman C. Beaulieu
IPC分类号： H03M13/00
CPC分类号： H03M13/1125 , H03M13/6502
摘要： Two hybrid message decoders for low-density parity-check (LDPC) codes are proposed. One decoder uses a posteriori probability ratio (APPR) and a posteriori probability difference (APPD), and the other decoder uses a logarithm a posteriori probability ratio (LAPPR) and a logarithm a posteriori probability difference (LAPPD) as hybrid message. Since the variable node and check node processing can be readily done using APPR and APPD, respectively, the proposed decoders have lower complexity than the conventional decoder that uses LAPPR only as a message.
摘要翻译： 提出了用于低密度奇偶校验（LDPC）码的两个混合消息解码器。 一个解码器使用后验概率比（APPR）和后验概率差（APPD），另一个解码器使用对数后验概率比（LAPPR）和对数后验概率差（LAPPD）作为混合消息。 由于可以使用APPR和APPD分别容易地完成变量节点和校验节点处理，因此所提出的解码器比仅使用LAPPR作为消息的常规解码器具有更低的复杂度。
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公开(公告)号：US08498323B2
公开(公告)日：2013-07-30
申请号：US12530562
申请日：2008-03-07
申请人： Norman C. Beaulieu , Hua Shao
发明人： Norman C. Beaulieu , Hua Shao
CPC分类号： H04B1/719 , H04B1/71637
摘要： A novel ultra-wide bandwidth receiver structure dubbed the “zonal” receiver is proposed to detect time-hopping ultra-wide bandwidth signals in multiple access interference channels. The zonal receiver outperforms the conventional matched filter ultra-wide bandwidth receiver and the recently proposed soft-limiting ultra-wide bandwidth receiver when only MAI is present, or AWGN is negligible compared to MAI. In more practical mixed MAI-plus-AWGN environments, the zonal ultra-wide bandwidth receiver achieves better performance than the conventional matched filter ultra-wide bandwidth receiver, the recently proposed soft-limiting ultra-wide bandwidth receiver, and the recently proposed adaptive threshold soft-limiting ultra-wide bandwidth receiver. In multipath fading UWB channels, a new Rake receiver based on the zonal UWB receiver design has been proposed, this new Rake receiver can achieve better BER performance than the conventional matched filter based Rake receiver.
摘要翻译： 提出了一种称为“区域”接收机的新型超宽带宽接收机结构，用于检测多接入干扰信道中的跳时超宽带宽信号。 区域接收机优于传统的匹配滤波器超宽带宽接收机和最近提出的仅限于MAI的软限幅超宽带宽接收机，或者与MAI相比，AWGN可以忽略不计。 在更实际的混合MAI-plus-AWGN环境中，区带超宽带宽接收机实现了比传统的匹配滤波器超宽带宽接收机更好的性能，最近提出的软限制超宽带宽接收机和最近提出的自适应阈值 软限幅超宽带宽接收机。 在多径衰落UWB信道中，已经提出了基于区带UWB接收机设计的新的Rake接收机，这种新的Rake接收机可以比常规的基于匹配滤波器的Rake接收机获得更好的BER性能。
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4.发明授权公开(公告)号：US07970048B2
公开(公告)日：2011-06-28
申请号：US12497129
申请日：2009-07-02
IPC分类号： H04N7/12
CPC分类号： H04B7/0669 , H04L1/0625 , H04L1/0656 , H04L27/2626
摘要： Space-time code, and methods for constructing space-time codes are provided. The space-time coder performs a respective linear transformation on each of P sets of K modulated symbols of a modulated symbol stream to produce P sets of T linearly transformed symbols, applies a respective phase rotation to each set of T linearly transformed symbols to produce a respective set of T phase rotated symbols, and performs a threading operation on the sets of T phase rotated symbols to produce P threaded sequences that define M output sequences. During each of T symbol periods, a respective one of the P threaded sequences includes a symbol from one of the P sets of phase rotated symbols. At least one symbol from each set of phase rotated symbols appears in each output sequence, where M>=2, 2 =M and M>=K.
摘要翻译： 提供时空代码和构建时空代码的方法。 空时编码器对调制符号流的K个调制符号的P组中的每一个执行相应的线性变换，以产生T个线性变换符号的P集合，将相应的相位旋转应用于每组T个线性变换的符号，以产生 相应的T相旋转符号组，并对T相旋转符号组进行线程操作，以产生定义M个输出序列的P线程序列。 在T个符号周期的每个期间，P个线程序列中的相应一个包括来自P组相位旋转符号之一的符号。 每个输出序列中出现每组相位旋转符号中的至少一个符号，其中M> = 2，2 <= P <= M，T> = M，M> = K。
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5.发明申请A P-ORDER METRIC UWB RECEIVER STRUCTURE WITH IMPROVED PERFORMANCE IN MULTIPLE ACCESS INTERFERENCE-PLUS-NOISE MULTIPATH CHANNELS 审中-公开具有改进性能的P-ORDER公制UWB接收机结构在多个接入干扰加噪声多通道中的性能公开(公告)号：US20100074307A1
公开(公告)日：2010-03-25
申请号：US12598706
申请日：2008-05-05
申请人： Norman C. Beaulieu , Hua Shao
发明人： Norman C. Beaulieu , Hua Shao
CPC分类号： H04B1/71637 , H04B2001/6908
摘要： A UWB receiver dubbed the “p-order metric” receiver (p-omr) is proposed to detect the time-hopping ultra-wide bandwidth signal in multiple access interference channels. The receiver acquires a signal over a wireless channel, adaptively selects a shaping parameter, p, over time and generates a first set of partial statistics by, for each of a plurality N of observations per symbol, using the shaping parameter to modify the exponential order of the approximation of the noise plus multiple access interference probability density function, f(x), used in the receiver model.
摘要翻译： 提出了称为“p阶度量”接收机（p-omr）的UWB接收机，用于检测多接入干扰信道中的跳时超宽带宽信号。 接收器通过无线信道获取信号，随着时间自适应地选择整形参数p，并且通过使用整形参数来修改指数阶数，通过针对每个符号的多个N个观察值中的每一个生成第一组部分统计信息 在接收机模型中使用的噪声加多重接入干扰概率密度函数f（x）的近似值。
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公开(公告)号：US20090034659A1
公开(公告)日：2009-02-05
申请号：US11665188
申请日：2005-10-12
申请人： Norman C. Beaulieu , Yunfei Chen
发明人： Norman C. Beaulieu , Yunfei Chen
IPC分类号： H03D1/00
CPC分类号： H04B1/76 , H04L25/023
摘要： Pilot symbol assisted modulation (PSAM) techniques for Rayleigh and Rician fading channels are derived. Previous techniques implement PSAM signal detectors as an ad-hoc design, using pilot symbols to first estimate channel gain, and then using channel gain estimates in a conventional coherent detector to make data decisions. Although this structure may be effective for binary phase shift keying in Rayleigh fading, it is suboptimal for Rician fading and for 16-ary quadrature amplitude modulation in Rayleigh fading. According to techniques disclosed herein, a PSAM signal detector jointly processes pilot symbols and data symbols. The performance of signal detectors according to embodiments of the invention is analyzed and compared with that of conventional detectors. Numerical results are presented to show that the performance gain of a proposed new PSAM signal detector over conventional PSAM detectors can be as much as 2 or 3 dB for Rician fading in some cases.
摘要翻译： 导出用于瑞利和Rician衰落信道的导频符号辅助调制（PSAM）技术。 以前的技术将PSAM信号检测器实现为ad-hoc设计，使用导频符号来首先估计信道增益，然后在常规相干检测器中使用信道增益估计来做出数据决定。 虽然这种结构对于瑞利衰落中的二进制相移键控可能是有效的，但对于瑞利衰落和瑞利衰落中的16进制正交幅度调制来说，这不是最佳的。 根据本文公开的技术，PSAM信号检测器联合处理导频符号和数据符号。 根据本发明的实施例的信号检测器的性能被分析并与常规检测器的性能进行比较。 提出数值结果表明，在某些情况下，对于Rician衰落，所提出的新型PSAM信号检测器在常规PSAM检测器上的性能增益可以高达2或3dB。
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公开(公告)号：US07142613B2
公开(公告)日：2006-11-28
申请号：US10107067
申请日：2002-03-28
申请人： Norman C. Beaulieu
发明人： Norman C. Beaulieu
CPC分类号： H04L25/03853
摘要： New systems and methods are provided which use a new pulse shape which performs better in certain circumstances than the raised cosine pulse.
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公开(公告)号：US20100190460A1
公开(公告)日：2010-07-29
申请号：US12602265
申请日：2008-04-28
申请人： Norman C. Beaulieu
发明人： Norman C. Beaulieu
CPC分类号： H04B7/0857
摘要： A dual-branch decorrelator receiver is provided in which decorrelation is performed with a simple addition and subtraction. The same receiver finds application in pre-processing signals that may not be correlated.
摘要翻译： 提供了一种双分支去相关器接收机，其中以相似性和简单的加法执行解相关。 相同的接收机在预处理可能不相关的信号中发现应用。
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9.发明申请公开(公告)号：US20090285332A1
公开(公告)日：2009-11-19
申请号：US12497129
申请日：2009-07-02
IPC分类号： H04L27/00
CPC分类号： H04B7/0669 , H04L1/0625 , H04L1/0656 , H04L27/2626
摘要： Space-time code, and methods for constructing space-time codes are provided. The space-time coder performs a respective linear transformation on each of P sets of K modulated symbols of a modulated symbol stream to produce P sets of T linearly transformed symbols, applies a respective phase rotation to each set of T linearly transformed symbols to produce a respective set of T phase rotated symbols, and performs a threading operation on the sets of T phase rotated symbols to produce P threaded sequences that define M output sequences; the threading operation being such that each threaded sequence is an allocation of output sequences over time of a respective one of the P sets of T phase rotated symbols in which all of the output sequences are used by each threaded sequence; during each of T symbol periods, a respective one of the P threaded sequences includes a symbol from one of the P sets of phase rotated symbols; and at least one symbol from each set of phase rotated symbols appears in each output sequence; where M>=2, 2 =M and M>=K.
摘要翻译： 提供时空代码和构建时空代码的方法。 空时编码器对调制符号流的K个调制符号的P组中的每一个执行相应的线性变换，以产生T个线性变换符号的P集合，将相应的相位旋转应用于每组T个线性变换的符号，以产生 相应的T相旋转符号组，并对T相旋转符号组进行线程操作，以产生定义M个输出序列的P线程序列; 所述线程操作使得每个线程序列是随着T个相位旋转符号的P组中的相应一个的时间的输出序列的分配，其中所有输出序列由每个线程序列使用; 在T个符号周期的每一个期间，P个线程序列中的相应一个包括来自P组相位旋转符号之一的符号; 并且每个输出序列中出现来自每组相位旋转符号的至少一个符号; 其中M> = 2，2 <= P <= M，T> = M，M> = K。
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10.发明授权公开(公告)号：US07583747B1
公开(公告)日：2009-09-01
申请号：US11095430
申请日：2005-03-31
IPC分类号： H04B7/02
CPC分类号： H04B7/0669 , H04L1/0625 , H04L1/0656 , H04L27/2626
摘要： Space-time code, and methods for constructing space-time codes are provided. The space-time coder performs a respective linear transformation on each of P sets of K modulated symbols of a modulated symbol stream to produce P sets of T linearly transformed symbols, applies a respective phase rotation to each set of T linearly transformed symbols to produce a respective set of T phase rotated symbols, and performs a threading operation on the sets of T phase rotated symbols to produce P threaded sequences that define M output sequences; the threading operation being such that each threaded sequence is an allocation of output sequences over time of a respective one of the P sets of T phase rotated symbols in which all of the output sequences are used by each threaded sequence; during each of T symbol periods, a respective one of the P threaded sequences includes a symbol from one of the P sets of phase rotated symbols; and at least one symbol from each set of phase rotated symbols appears in each output sequence; where M>=2, 2 =M and M>=K.
摘要翻译： 提供时空代码和构建时空代码的方法。 空时编码器对调制符号流的K个调制符号的P组中的每一个执行相应的线性变换，以产生T个线性变换符号的P集合，将相应的相位旋转应用于每组T个线性变换的符号，以产生 相应的T相旋转符号组，并对T相旋转符号组进行线程操作，以产生定义M个输出序列的P线程序列; 所述线程操作使得每个线程序列是随着T个相位旋转符号的P组中的相应一个的时间的输出序列的分配，其中所有输出序列由每个线程序列使用; 在T个符号周期的每一个期间，P个线程序列中的相应一个包括来自P组相位旋转符号之一的符号; 并且每个输出序列中出现来自每组相位旋转符号的至少一个符号; 其中M> = 2，2 <= P <= M，T> = M，M> = K。
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