公开(公告)号：US08903012B2

公开(公告)日：2014-12-02

申请号：US12894358

申请日：2010-09-30

Applicant: Rohit Seshadri ,  Mustafa Eroz ,  Lin-Nan Lee

Inventor： Rohit Seshadri ,  Mustafa Eroz ,  Lin-Nan Lee

IPC: H04L27/00 ,  H04L25/03 ,  H04L1/00 ,  H04L27/20

CPC classification number: H04L27/2003 ,  H04L1/0059 ,  H04L25/03834 ,  H04L25/0384

Abstract: A new coded continuous phase modulation (CPM) scheme is proposed to enhance physical layer performance of the current DVB-RCS standard for a satellite communication system. The proposed CPM scheme uses a phase pulse design and combination of modulation parameters to shape the power spectrum of CPM signal in order to improve resilience to adjacent channel interference (ACI). Additionally, it uses a low complexity binary convolutional codes and S-random bit interleaving. Phase response using the proposed CPM scheme is a weighted average of the conventional rectangular and raised-cosine responses and provides optimum response to minimize frame error rate for a given data rate.

Abstract translation: 提出了一种新的编码连续相位调制（CPM）方案来增强卫星通信系统当前DVB-RCS标准的物理层性能。 所提出的CPM方案使用相位脉冲设计和调制参数的组合来形成CPM信号的功率谱，以便提高对相邻信道干扰（ACI）的抵御能力。 另外，它使用低复杂度二进制卷积码和S随机比特交织。 使用所提出的CPM方案的相位响应是常规矩形和上升余弦响应的加权平均值，并且为给定数据速率最小化帧错误率提供最佳响应。

公开(公告)号：US08170502B2

公开(公告)日：2012-05-01

申请号：US12894380

申请日：2010-09-30

Applicant: Rohit Seshadri ,  Bassel F. Beidas ,  Mustafa Eroz ,  Lin-Nan Lee

Inventor： Rohit Seshadri ,  Bassel F. Beidas ,  Mustafa Eroz ,  Lin-Nan Lee

IPC: H04B1/02

CPC classification number: H04L25/0384 ,  H04L1/0059 ,  H04L25/03834 ,  H04L27/2003

Abstract: A new pulse shape for CPM is introduced which is obtained by a linear combination of well-known RC and REC pulse shapes. The new pulse shape addresses the tradeoff between the width of the PSD main lobe and the rate of decay of the side lobe to improve the coded performance of multi-carrier systems affected by ACI. Also, a methodology is proposed to design and evaluate the performance of the new pulse shape for multi-carrier, coded systems based on the modulation constrained capacity. Furthermore, a binary convolutional code and the CPM modulator are concatenated using an S-random bit interleaver to lower the error floor. Finally, Laurent representation of the new pulse shape is suggested such that by retaining only the principal pulses at the receiver, complexity of the receiver can be reduced.

Abstract translation: 引入了用于CPM的新的脉冲形状，其通过公知的RC和REC脉冲形状的线性组合获得。 新的脉冲形状解决了PSD主波瓣的宽度与旁瓣衰减速率之间的折衷，以提高受ACI影响的多载波系统的编码性能。 此外，提出了一种基于调制约束能力的方法来设计和评估用于多载波编码系统的新脉冲形状的性能。 此外，使用S随机比特交织器将二进制卷积码和CPM调制器级联以降低错误楼层。 最后，提出了新的脉冲形状的Laurent表示，使得通过仅保留接收器处的主脉冲，可以减少接收机的复杂性。

公开(公告)号：US20110275338A1

公开(公告)日：2011-11-10

申请号：US12894380

申请日：2010-09-30

Applicant: Rohit SESHADRI ,  Bassel F. BEIDAS ,  Mustafa EROZ ,  Lin-Nan LEE

Inventor： Rohit SESHADRI ,  Bassel F. BEIDAS ,  Mustafa EROZ ,  Lin-Nan LEE

IPC: H04B1/16 ,  H03C3/02

CPC classification number: H04L25/0384 ,  H04L1/0059 ,  H04L25/03834 ,  H04L27/2003

Abstract: A new pulse shape for CPM is introduced which is obtained by a linear combination of well-known RC and REC pulse shapes. The new pulse shape addresses the tradeoff between the width of the PSD main lobe and the rate of decay of the side lobe to improve the coded performance of multi-carrier systems affected by ACI. Also, a methodology is proposed to design and evaluate the performance of the new pulse shape for multi-carrier, coded systems based on the modulation constrained capacity. Furthermore, a binary convolutional code and the CPM modulator are concatenated using an S-random bit interleaver to lower the error floor. Finally, Laurent representation of the new pulse shape is suggested such that by retaining only the principal pulses at the receiver, complexity of the receiver can be reduced.

Abstract translation: 引入了用于CPM的新的脉冲形状，其通过公知的RC和REC脉冲形状的线性组合获得。 新的脉冲形状解决了PSD主波瓣的宽度与旁瓣衰减速率之间的折衷，以提高受ACI影响的多载波系统的编码性能。 此外，提出了一种基于调制约束能力的方法来设计和评估用于多载波编码系统的新脉冲形状的性能。 此外，使用S随机比特交织器将二进制卷积码和CPM调制器级联以降低错误楼层。 最后，提出了新的脉冲形状的Laurent表示，使得通过仅保留接收器处的主脉冲，可以减少接收机的复杂性。

公开(公告)号：US20110274216A1

公开(公告)日：2011-11-10

申请号：US12894358

申请日：2010-09-30

Applicant: Rohit Seshadri ,  Mustafa Eroz ,  Lin-Nan Lee

Inventor： Rohit Seshadri ,  Mustafa Eroz ,  Lin-Nan Lee

IPC: H04L27/12 ,  H03D3/00

CPC classification number: H04L27/2003 ,  H04L1/0059 ,  H04L25/03834 ,  H04L25/0384

Abstract: A new coded continuous phase modulation (CPM) scheme is proposed to enhance physical layer performance of the current DVB-RCS standard for a satellite communication system. The proposed CPM scheme uses a phase pulse design and combination of modulation parameters to shape the power spectrum of CPM signal in order to improve resilience to adjacent channel interference (ACI). Additionally, it improves error rate performance at both high and low frame error rates using low complexity binary convolutional codes and S-random bit interleaving. Phase response using the proposed CPM scheme is a weighted average of the conventional rectangular and raised-cosine responses and provides optimum response to minimize frame error rate for a given data rate.

Abstract translation: 提出了一种新的编码连续相位调制（CPM）方案来增强卫星通信系统当前DVB-RCS标准的物理层性能。 所提出的CPM方案使用相位脉冲设计和调制参数的组合来形成CPM信号的功率谱，以便提高对相邻信道干扰（ACI）的抵御能力。 另外，它使用低复杂度的二进制卷积码和S随机比特交织来提高高和低帧错误率的误码率性能。 使用所提出的CPM方案的相位响应是常规矩形和上升余弦响应的加权平均值，并且为给定数据速率最小化帧错误率提供最佳响应。

公开(公告)号：US08527833B2

公开(公告)日：2013-09-03

申请号：US13231474

申请日：2011-09-13

Applicant: Rohit Seshadri ,  Mustafa Eroz ,  Lin-Nan Lee

Inventor： Rohit Seshadri ,  Mustafa Eroz ,  Lin-Nan Lee

IPC: H03M13/00

CPC classification number: H03M13/2767 ,  H03M13/275 ,  H03M13/276 ,  H03M13/2789

Abstract: A parameterized interleaver design process is provided, which optimizes the design for interleavers of any size, and can be completely specified using only a few design parameters. According to the parameterized interleaver design process an interleaver π(i) of a length N is generated. A number of subpermutation masks are defined, and a first intermediate interleaver permutation is partitioned into a number of subgroups, wherein the number of subgroups corresponds with the number of subpermutation masks. Each of the subgroups of the first intermediate interleaver permutation is partitioned into a number of further subgroups, and each of the subpermutation masks is applied to each of the further subgroups of a corresponding subgroup of the first intermediate interleaver permutation, resulting in a corresponding portion of a second intermediate interleaver permutation. The resulting interleaver π(i) is generated based at least in part on the first and second intermediate interleaver permutations.

Abstract translation: 提供了一种参数化的交织器设计过程，其优化了任何尺寸的交织器的设计，并且可以仅使用少量设计参数来完全指定。 根据参数化交织器设计处理，生成长度为N的交织器pi（i）。 定义了多个子鉴别掩码，并且将第一中间交织器置换分割成多个子组，其中子组的数量对应于子鉴别掩码的数量。 第一中间交织器排列的每个子组被划分成多个其他子组，并且每个子质量掩模被应用于第一中间交织器排列的相应子组的其他子组中的每一个，导致相应部分 第二中间交织器排列。 至少部分地基于第一和第二中间交织器排列来生成所产生的交织器pi（i）。

公开(公告)号：US20120124453A1

公开(公告)日：2012-05-17

申请号：US13231474

申请日：2011-09-13

Applicant: Rohit Seshadri ,  Mustafa Eroz ,  Lin-Nan Lee

Inventor： Rohit Seshadri ,  Mustafa Eroz ,  Lin-Nan Lee

IPC: H03M13/27 ,  G06F11/10

CPC classification number: H03M13/2767 ,  H03M13/275 ,  H03M13/276 ,  H03M13/2789

Abstract: A parameterized interleaver design process is provided, which optimizes the design for interleavers of any size, and can be completely specified using only a few design parameters. According to the parameterized interleaver design process an interleaver π(i) of a length N is generated. A number of subpermutation masks are defined, and a first intermediate interleaver permutation is partitioned into a number of subgroups, wherein the number of subgroups corresponds with the number of subpermutation masks. Each of the subgroups of the first intermediate interleaver permutation is partitioned into a number of further subgroups, and each of the subpermutation masks is applied to each of the further subgroups of a corresponding subgroup of the first intermediate interleaver permutation, resulting in a corresponding portion of a second intermediate interleaver permutation. The resulting interleaver π(i) is generated based at least in part on the first and second intermediate interleaver permutations.

Abstract translation: 提供了一种参数化的交织器设计过程，其优化了任何尺寸的交织器的设计，并且可以仅使用少量设计参数来完全指定。 根据参数化交织器设计过程，生成长度为N的交织器（i）。 定义了多个子鉴别掩码，并且将第一中间交织器置换分割成多个子组，其中子组的数量对应于子鉴别掩码的数量。 第一中间交织器置换的每个子组被划分成多个其他子组，并且每个子精确掩码被应用于第一中间交织器排列的相应子组的其他子组中的每一个，导致相应部分 第二中间交织器排列。 至少部分地基于第一和第二中间交织器排列来生成所产生的交织器（i）。