公开(公告)号：US07434149B2

公开(公告)日：2008-10-07

申请号：US11118175

申请日：2005-04-29

申请人： Yun-I Shih ,  Hsien-Yuan Hsu ,  Hung-Jua Ting ,  Chun-Hao Huang

发明人： Yun-I Shih ,  Hsien-Yuan Hsu ,  Hung-Jua Ting ,  Chun-Hao Huang

IPC分类号： H03M13/03

CPC分类号： H03M13/6502 ,  H03M13/3738 ,  H03M13/4176 ,  H03M13/4192

摘要： A prediction device and method for use in a Viterbi decoder is provided. The prediction device is applicable to a communication system with low bit error rate for reducing the count of accessing path memories, thereby lowering the power consumption of the system. The prediction device needs not activate the traceback modules when making a successful prediction. In other words, no access to the path memories is required. The predicted bits decoded and outputted by the decoded bit registers are the decoded bits from the Viterbi decoder. Therefore, the prediction device saves much traceback and power consumption for decoding.

摘要翻译： 提供了一种用于维特比解码器的预测装置和方法。 预测装置适用于具有低误码率的通信系统，用于减少访问路径存储器的计数，从而降低系统的功耗。 预测设备在进行成功预测时，不需要激活追溯模块。 换句话说，不需要访问路径存储器。 由解码位寄存器解码和输出的预测位是来自维特比解码器的解码位。 因此，预测装置为解码节省了大量的追溯和功耗。

公开(公告)号：US20060129903A1

公开(公告)日：2006-06-15

申请号：US11118175

申请日：2005-04-29

申请人： Yun-I Shih ,  Hsien-Yuan Hsu ,  Hung-Jua Ting ,  Chun-Hao Huang

发明人： Yun-I Shih ,  Hsien-Yuan Hsu ,  Hung-Jua Ting ,  Chun-Hao Huang

IPC分类号： H03M13/03

CPC分类号： H03M13/6502 ,  H03M13/3738 ,  H03M13/4176 ,  H03M13/4192

摘要： A prediction device and method for use in a Viterbi decoder is provided. The prediction device is applicable to a communication system with low bit error rate for reducing the count of accessing path memories, thereby lowering the power consumption of the system. The prediction device needs not activate the traceback modules when making a successful prediction. In other words, no access to the path memories is required. The predicted bits decoded and outputted by the decode bit registers are the decoded bits from the Viterbi decoder. Therefore, the prediction device saves much traceback works and power consumption for decoding.

摘要翻译： 提供了一种用于维特比解码器的预测装置和方法。 预测装置适用于具有低误码率的通信系统，用于减少访问路径存储器的计数，从而降低系统的功耗。 预测设备在进行成功预测时，不需要激活追溯模块。 换句话说，不需要访问路径存储器。 由解码位寄存器解码和输出的预测位是来自维特比解码器的解码位。 因此，预测装置可以节省大量的追溯功能和解码功耗。

公开(公告)号：US20060140293A1

公开(公告)日：2006-06-29

申请号：US11183214

申请日：2005-07-15

申请人： Ko-Yin Lai ,  Wan-Jen Tsai ,  Hung-Jua Ting

发明人： Ko-Yin Lai ,  Wan-Jen Tsai ,  Hung-Jua Ting

IPC分类号： H04K1/10 ,  H04L27/06

CPC分类号： H04L27/2662 ,  H04L27/2613 ,  H04L27/2659 ,  H04L27/2675

摘要： A method for detecting signal and estimating symbol timing is provided. The method is applicable to the receiver in an OFDM system. The method uses the autocorrelation of the short preamble of input signals to detect signals, and performs the coarse frequency offset compensation at the same time. Then, the end of the short preamble for the input signals is detected by the signal detection. The compensated signals are cross-correlated with the portion of the long preamble or that of guard interval together with the long preamble. In addition, the method uses the information for the end of the short preamble to find out a range of the sliding window for estimating symbol timing. In such a manner, the method can make sure of the accuracy for the symbol timing.

摘要翻译： 提供了一种用于检测信号和估计符号定时的方法。 该方法适用于OFDM系统中的接收机。 该方法使用输入信号的短前置码的自相关来检测信号，同时执行粗频偏移补偿。 然后，通过信号检测来检测输入信号的短前置码的结束。 补偿信号与长前导码的部分或保护间隔的部分与长前同步码互相关。 此外，该方法使用用于短前导码结束的信息来找出用于估计符号定时的滑动窗口的范围。 以这种方式，该方法可以确保符号定时的准确性。