公开(公告)号：US20070036234A1

公开(公告)日：2007-02-15

申请号：US11298184

申请日：2005-12-09

Applicant: Yun-Yen Chen ,  Chih-Peng Li ,  Wei-Wen Hu

Inventor： Yun-Yen Chen ,  Chih-Peng Li ,  Wei-Wen Hu

IPC: H04K1/10

CPC classification number: H04L27/2657 ,  H04L27/2662 ,  H04L27/2675 ,  H04L27/2678

Abstract: The invention relates to an orthogonal frequency division multiplexing system with PN-sequence. In the synchronization of the invention, both timing offset and frequency offset are estimated and compensated by utilizing a time and frequency synchronization device. In addition, the PN-sequence with the cyclic prefix is added to the OFDM symbol before transmitting. The time and frequency synchronization device of the invention comprises two synchronization circuits from the cyclic prefix and PN-sequence when calculating the timing offset and frequency offset of receiving signal. As a result, the OFDM system of the invention not only has better performance in fading channel, but also has the better bandwidth utilization without extra bandwidth for transmitting the PN-sequence.

Abstract translation: 本发明涉及具有PN序列的正交频分复用系统。 在本发明的同步中，通过利用时间和频率同步装置来估计和补偿定时偏移和频率偏移。 此外，具有循环前缀的PN序列在发送之前被添加到OFDM符号。 当计算接收信号的定时偏移和频率偏移时，本发明的时间和频率同步装置包括来自循环前缀和PN序列的两个同步电路。 结果，本发明的OFDM系统不仅在衰落信道中具有更好的性能，而且具有更好的带宽利用率，而没有用于发送PN序列的额外带宽。

公开(公告)号：US07715484B2

公开(公告)日：2010-05-11

申请号：US11298184

申请日：2005-12-09

Applicant: Yun-Yen Chen ,  Chih-Peng Li ,  Wei-Wen Hu

Inventor： Yun-Yen Chen ,  Chih-Peng Li ,  Wei-Wen Hu

IPC: H04K1/10

CPC classification number: H04L27/2657 ,  H04L27/2662 ,  H04L27/2675 ,  H04L27/2678

Abstract: The invention relates to an orthogonal frequency division multiplexing system with PN-sequence. In the synchronization of the invention, both timing offset and frequency offset are estimated and compensated by utilizing a time and frequency synchronization device. In addition, the PN-sequence with the cyclic prefix is added to the OFDM symbol before transmitting. The time and frequency synchronization device of the invention comprises two synchronization circuits from the cyclic prefix and PN-sequence when calculating the timing offset and frequency offset of receiving signal. As a result, the OFDM system of the invention not only has better performance in fading channel, but also has the better bandwidth utilization without extra bandwidth for transmitting the PN-sequence.

Abstract translation: 本发明涉及具有PN序列的正交频分复用系统。 在本发明的同步中，通过利用时间和频率同步装置来估计和补偿定时偏移和频率偏移。 此外，具有循环前缀的PN序列在发送之前被添加到OFDM符号。 当计算接收信号的定时偏移和频率偏移时，本发明的时间和频率同步装置包括来自循环前缀和PN序列的两个同步电路。 结果，本发明的OFDM系统不仅在衰落信道中具有更好的性能，而且具有更好的带宽利用率，而没有用于发送PN序列的额外带宽。

公开(公告)号：US08054838B2

公开(公告)日：2011-11-08

申请号：US12111251

申请日：2008-04-29

Applicant: Yung-Ching Huang ,  Wei-Wen Hu ,  Yu-Hsien Chiu

Inventor： Yung-Ching Huang ,  Wei-Wen Hu ,  Yu-Hsien Chiu

IPC: H04L12/28 ,  H04L12/56

CPC classification number: H04L12/2838 ,  H04L12/4633 ,  H04L69/08 ,  H04L69/12 ,  H04L69/18 ,  H04L69/323 ,  H04L69/324

Abstract: The present invention relates to a method and an apparatus of transmitting data via a multi-protocol single-medium network. The method includes initializing a network; transmitting messages in the network; setting up the size and the protocol of the messages and assigning the messages to a multi-protocol stack of the PHY layer based on a network time sharing multitasking principle; assigning each of the messages to a proper time slot; checking whether or not all messages are assigned to the proper time slots; if yes, transmitting the messages; and receiving the messages by a network device and transmitting the messages to another network device via a single-medium network.

Abstract translation: 本发明涉及通过多协议单媒体网络发送数据的方法和装置。 该方法包括初始化网络; 在网络中传输消息; 基于网络时间共享多任务原理，建立消息的大小和协议，并将消息分配给PHY层的多协议栈; 将每个消息分配到适当的时隙; 检查所有消息是否分配给正确的时隙; 如果是，发送消息; 以及通过网络设备接收消息，并经由单媒体网络将消息发送到另一网络设备。