公开(公告)号：US06172993B2

公开(公告)日：2001-01-09

申请号：US08982268

申请日：1997-12-01

申请人： Young-Sang Kim ,  Francois Langinieux

发明人： Young-Sang Kim ,  Francois Langinieux

IPC分类号： H04J306

CPC分类号： H04L27/2656 ,  H04L27/2675

摘要： A frame synchronization method and apparatus for use in a digital communication system utilizing OFDM method are disclosed. The frame synchronization apparatus comprises a phase calculator for calculating phase values of TPS pilots within a symbol according to in-phase and quadrature-phase channel signals received from a transmitting side; a D-BPSK demodulator for performing D-BPSK demodulation for the phase values of TPS pilots supplied from the phase calculator and outputting the TPS pilots within the demodulated symbol; a control signal generator for comparing the demodulated TPS pilots with each other and outputting a control signal according to the compared result; and frame synchronization unit for confirming a sync word position according to the control signal supplied from the control signal generator and outputting a frame sync signal. Hence, frame synchronization can be achieved by using the synchronization word inverted at each frame in one TPS block without the need to increase the size of hardware.

摘要翻译： 公开了一种在使用OFDM方法的数字通信系统中使用的帧同步方法和装置。 帧同步装置包括相位计算器，用于根据从发送侧接收的同相和正交相位信道信号计算符号内的TPS导频的相位值; D-BPSK解调器，用于对从相位计算器提供的TPS导频的相位值进行D-BPSK解调，并输出解调符号内的TPS导频; 控制信号发生器，用于将解调的TPS导频相互比较并根据比较结果输出控制信号; 以及帧同步单元，用于根据从控制信号发生器提供的控制信号确认同步字位置并输出帧同步信号。 因此，可以通过使用在一个TPS块中的每个帧处反转的同步字而不需要增加硬件的大小来实现帧同步。

公开(公告)号：US06470030B1

公开(公告)日：2002-10-22

申请号：US09261508

申请日：1999-03-03

申请人： Jae Hyeok Park ,  Yeong Sang Kim ,  Jean Jacques Michel ,  Francois Langinieux ,  Olivier Dejonghe

发明人： Jae Hyeok Park ,  Yeong Sang Kim ,  Jean Jacques Michel ,  Francois Langinieux ,  Olivier Dejonghe

IPC分类号： H04J1100

CPC分类号： H04L27/2665 ,  H04L27/2647 ,  H04L27/2659 ,  H04L27/266 ,  H04L27/2663

摘要： An OFDM receiver system for performing precise OFDM demodulation is provided. The OFDM receiver system performs demodulation by sharing memories and operators in a time-divisional manner. FFT-processed data is separated into specific pilot signals and data according to the timing indicated by a controller to then be rearranged and stored, thereby facilitating extraction of corresponding pilot signals and data for various synchronization and equalization steps. Therefore, the demodulation system having an optimal structure can be realized in view of resource utilization efficiency and chip areas, the cost and time for fabricating and designing the system can be reduced, and verification of the system can be easily performed.

摘要翻译： 提供了一种用于执行精确OFDM解调的OFDM接收机系统。 OFDM接收机系统以时分方式共享存储器和操作者来进行解调。 FFT处理后的数据根据​​控制器指示的定时分为特定的导频信号和数据，然后进行重新排列和存储，从而便于提取相应的导频信号和各种同步和均衡步骤的数据。 因此，考虑到资源利用效率和芯片面积，可以实现具有最佳结构的解调系统，可以降低制造和设计系统的成本和时间，并且可以容易地执行系统的验证。