公开(公告)号：US20080148133A1

公开(公告)日：2008-06-19

申请号：US11638935

申请日：2006-12-13

申请人： Jason Duggan

发明人： Jason Duggan

IPC分类号： H03M13/03

CPC分类号： H03M13/3753

摘要： A method, apparatus and system for improving block error rate performance of a receiver having an iterative decoder in a communication system, the method, apparatus and system includes receiving an encoded frame of data, the encoded frame of data includes a quantity of code blocks where each code block has a corresponding code block size, determining a first maximum number of iterations for each of the code blocks of the encoded frame of data iteratively performing a decoding operation on a first code block until the occurrence of one of (a) the first maximum number of iterations has been reached and (b) the first code block has converged, and determining a second maximum number of iterations for the remaining code blocks of the encoded frame of data based on the number of actual iterations used to decode the first code block.

摘要翻译： 一种用于提高在通信系统中具有迭代解码器的接收机的块错误率性能的方法，装置和系统，所述方法，装置和系统包括接收编码的数据帧，所述编码的数据帧包括一定数量的码块， 每个代码块具有对应的代码块大小，确定对编码的数据帧的每个代码块的第一最大迭代次数迭代地对第一代码块进行解码操作，直到出现（a）第一代码块 已经达到最大迭代次数，并且（b）第一代码块已经收敛，并且基于用于对第一代码进行解码的实际迭代次数，确定编码的数据帧的剩余代码块的第二最大迭代次数 块。

公开(公告)号：US07765453B2

公开(公告)日：2010-07-27

申请号：US11638935

申请日：2006-12-13

申请人： Jason Duggan

发明人： Jason Duggan

IPC分类号： H03M13/03

CPC分类号： H03M13/3753

摘要： A method, apparatus and system for improving block error rate performance of a receiver having an iterative decoder in a communication system, the method, apparatus and system includes receiving an encoded frame of data, the encoded frame of data includes a quantity of code blocks where each code block has a corresponding code block size, determining a first maximum number of iterations for each of the code blocks of the encoded frame of data iteratively performing a decoding operation on a first code block until the occurrence of one of (a) the first maximum number of iterations has been reached and (b) the first code block has converged, and determining a second maximum number of iterations for the remaining code blocks of the encoded frame of data based on the number of actual iterations used to decode the first code block.

摘要翻译： 一种用于提高在通信系统中具有迭代解码器的接收机的块错误率性能的方法，装置和系统，所述方法，装置和系统包括接收编码的数据帧，所述编码的数据帧包括一定数量的码块， 每个代码块具有对应的代码块大小，确定对编码的数据帧的每个代码块的第一最大迭代次数迭代地对第一代码块进行解码操作，直到出现（a）第一代码块 已经达到最大迭代次数，并且（b）第一代码块已经收敛，并且基于用于对第一代码进行解码的实际迭代次数，确定编码的数据帧的剩余代码块的第二最大迭代次数 块。

公开(公告)号：US07586976B1

公开(公告)日：2009-09-08

申请号：US11366387

申请日：2006-03-03

申请人： Jason Duggan

发明人： Jason Duggan

IPC分类号： H04L27/30

CPC分类号： H04L27/2647

摘要： An initial ranging detection for an orthogonal frequency division multiple access (OFDMA) wireless communication system entails removing data sub-carriers from samples of an OFDMA signal in order to suppress inter-carrier interference (ICI) between the data sub-carriers and initial ranging sub-carriers, coherently summing the resulting samples to boost signal energy, and applying a sliding window FFT to the coherently summed samples for correlating each result of the sliding window FFT with each one of a set of predetermined codes. The suppression of ICI is done by removing the cyclic prefix, performing an FFT to transform to the frequency domain whereupon the initial ranging sub-carriers are zeroed. An IFFT is then performed to return to the time domain. The cyclic prefix is then added and the new samples are subtracted from the originally received samples. The resulting samples are free of ICI and can then be coherently summed to boost signal energy.

摘要翻译： 用于正交频分多址（OFDMA）无线通信系统的初始测距检测需要从OFDMA信号的采样中去除数据子载波，以便抑制数据子载波和初始测距子载波之间的载波间干扰（ICI） 载波，对所得样本进行相干相加以提高信号能量，以及将滑动窗口FFT应用于相干求和样本，以将滑动窗口FFT的每个结果与一组预定代码中的每一个相关联。 ICI的抑制通过去除循环前缀，执行FFT来转换到频域，由此初始测距子载波归零。 然后执行IFFT以返回到时域。 然后添加循环前缀，并从最初接收的样本中减去新的样本。 所得样品不含ICI，然后可以相干相加以提高信号能量。

公开(公告)号：US20050041622A1

公开(公告)日：2005-02-24

申请号：US10678631

申请日：2003-10-03

申请人： Christian Dubuc ,  Jason Duggan ,  Peiying Zhu

发明人： Christian Dubuc ,  Jason Duggan ,  Peiying Zhu

IPC分类号： H04L1/00 ,  H04L1/06 ,  H04L1/20 ,  H04L12/56 ,  H04L27/26 ,  H04W16/14 ,  H04W24/08 ,  H04W28/22 ,  H04W72/12 ,  H04Q7/00

CPC分类号： H04L1/0071 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0061 ,  H04L1/0618 ,  H04L1/20 ,  H04L27/2601 ,  H04W72/1231 ,  H04W72/1284

摘要： The present invention provides an improved channel quality indicator indicia for OFDM communication environments. In addition to taking into consideration carrier-to-interference ratios, the present invention also takes into consideration the degree to which the channel response varies among the sub-carriers throughout the OFDM frequency band. The carrier-to-interference ratio and the degree of channel response variation are directly or indirectly used by a base station to select coding and modulation schemes for transmissions from the base station to the mobile terminal reporting these factors. Further, scheduling of data sent to the mobile terminal and other mobile terminals competing for the same channel resources may also be based in part on the carrier-to-interference ratio and the degree to which the channel response varies.

摘要翻译： 本发明提供了用于OFDM通信环境的改进的信道质量指示符标记。 除了考虑载波干扰比之外，本发明还考虑了整个OFDM频带中的子载波之间信道响应变化的程度。 载波干扰比和信道响应变化程度由基站直接或间接地用于选择用于从基站到移动终端的报告这些因素的传输的编码和调制方案。 此外，发送到移动终端和竞争相同信道资源的其他移动终端的数据的调度也可以部分地基于载波干扰比和信道响应变化的程度。