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公开(公告)号：US07778370B2
公开(公告)日：2010-08-17
申请号：US11505624
申请日：2006-08-16
IPC分类号： H04L7/00
CPC分类号： H04L27/2656 , H04L27/2675
摘要： Frame synchronization methods and systems suited for packet communications systems, and particularly time frequency hopping packet communication systems, are disclosed. Frame synchronization is performed by performing a first correlation on information of received symbols and performing a second correlation on results of the first correlation. In systems with repeating synchronization information modulated by a cover sequence, the results of the second correlation may be used to determine symbol numbering of symbols in a packet.
摘要翻译： 公开了适用于分组通信系统，特别是时间跳频分组通信系统的帧同步方法和系统。 通过对接收到的符号的信息执行第一相关并对第一相关的结果执行第二相关来执行帧同步。 在具有由覆盖序列调制的重复同步信息的系统中，第二相关的结果可用于确定分组中符号的符号编号。
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公开(公告)号：US07986739B2
公开(公告)日：2011-07-26
申请号：US12036968
申请日：2008-02-25
IPC分类号： H04L27/28
CPC分类号： H04L5/0062 , H04L5/0007 , H04L27/0006
摘要： A method and system for detecting the presence of narrowband transmitters utilizing frequencies also utilized by wider band communication systems. In some embodiments an ultrawideband transceiver detects signals at specific frequencies within a spectrum of frequencies, and analyzes the signals to determine if the signals indicate transmissions by a narrowband transmitter in a narrowband communication system. In further embodiments transmission circuitry reduces signal components at frequencies occupied by the narrowband transmitters.
摘要翻译： 一种用于利用更宽频带通信系统也利用的频率来检测窄带发射机的存在的方法和系统。 在一些实施例中，超宽带收发器在频谱范围内检测特定频率的信号，并分析信号以确定信号是否指示窄带通信系统中窄带发射机的传输。 在另外的实施例中，传输电路在由窄带发射机占据的频率处减少信号分量。
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公开(公告)号：US20080207156A1
公开(公告)日：2008-08-28
申请号：US12036968
申请日：2008-02-25
IPC分类号： H04B1/10
CPC分类号： H04L5/0062 , H04L5/0007 , H04L27/0006
摘要： A method and system for detecting the presence of narrowband transmitters utilizing frequencies also utilized by wider band communication systems. In some embodiments an ultrawideband transceiver detects signals at specific frequencies within a spectrum of frequencies, and analyzes the signals to determine if the signals indicate transmissions by a narrowband transmitter in a narrowband communication system. In further embodiments transmission circuitry reduces signal components at frequencies occupied by the narrowband transmitters.
摘要翻译： 一种用于利用更宽频带通信系统也利用的频率来检测窄带发射机的存在的方法和系统。 在一些实施例中，超宽带收发器在频谱范围内检测特定频率的信号，并分析信号以确定信号是否指示窄带通信系统中窄带发射机的传输。 在另外的实施例中，传输电路在由窄带发射机占据的频率处减少信号分量。
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公开(公告)号：US20070067704A1
公开(公告)日：2007-03-22
申请号：US11490844
申请日：2006-07-21
申请人： Mustafa Altintas , Turgut Aytur , Ravishankar Mahadevappa , Feng Shi , Stephan Brink , Ran Yan
发明人： Mustafa Altintas , Turgut Aytur , Ravishankar Mahadevappa , Feng Shi , Stephan Brink , Ran Yan
IPC分类号： H03M13/03
CPC分类号： H03M13/41 , H03M13/27 , H03M13/6561 , H03M13/6566 , H04L1/0054 , H04L1/0059 , H04L1/0068 , H04L1/0071 , H04L1/06
摘要： Pairs of parallel Viterbi decoders use windowed block data for decoding data at rates above 320 Mbps. Memory banks of the deinterleavers feeding the decoders operate such that some are receiving data while others are sending data to the decoders. Parallel input streams to every pair of decoders overlap for several traceback lengths of the decoder causing data input to a first decoder at the end of an input stream to be the same as the data input to a second decoder of the same pair at the beginning of an input stream. Then, the first decoder is able to post-synchronize its path metric with the second decoder and the second decoder is able to pre-synchronize its path metric with the first. Either, the deinterleaver data length is an integer multiple of the traceback length or the data input to only the first block of the first interleaver is padded.
摘要翻译： 一对并行维特比解码器使用窗口块数据，以高于320 Mbps的速率解码数据。 供给解码器的解交织器的存储器操作，使得一些接收数据，而其他数据传送到解码器。 对于每对解码器的并行输入流与解码器的几个回溯长度重叠，导致在输入流结束时输入到第一解码器的数据输入与输入到相同对的第二解码器的数据相同 一个输入流。 然后，第一解码器能够与第二解码器后同步其路径度量，并且第二解码器能够将其路径度量与第一解码器预先同步。 或者，解交织器数据长度是回溯长度的整数倍，或仅填充第一交织器的第一块的数据输入。
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公开(公告)号：US07986726B2
公开(公告)日：2011-07-26
申请号：US11267829
申请日：2005-11-03
申请人： Behzad Razavi , Han-Chang Kang , Turgut Aytur , Ran Yan
发明人： Behzad Razavi , Han-Chang Kang , Turgut Aytur , Ran Yan
IPC分类号： H04B1/38
CPC分类号： H04B1/7163 , H04B1/7136 , H04B1/71635 , H04B1/71637 , H04B2001/71362
摘要： A direct conversion ultrawideband transceiver employing three phase locked loops (PLLs). The PLLs are preferably fixed-frequency PLLs that operate continuously, at different frequencies, with a selected frequency determined by selecting the output of one of the three PLLs. The use of three PLLs is suitable for use in a communication system employing frequency hopping across three bands or sub-bands.
摘要翻译： 采用三个锁相环（PLL）的直接转换超宽带收发器。 PLL优选地是以不同频率连续工作的固定频率PLL，选择的频率是通过选择三个PLL之一的输出来确定的。 使用三个PLL适用于在三个频带或子频带上采用跳频的通信系统。
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公开(公告)号：US20070058739A1
公开(公告)日：2007-03-15
申请号：US11506754
申请日：2006-08-18
申请人： Turgut Aytur , Stephan Brink , Ravishankar Mahadevappa , Ran Yan
发明人： Turgut Aytur , Stephan Brink , Ravishankar Mahadevappa , Ran Yan
CPC分类号： H04L27/2601 , H03G3/3068 , H04B1/71637 , H04L27/2647
摘要： An automatic gain control method and system for use in signal processing of OFDM symbols at a receiver. Two stages of coarse and fine automatic gain control are implemented that adjust different gains in an analog RF processing stage of the receiver. Gain of a low noise amplifier and a mixer are adjusted during a first and coarse automatic gain control stage based on feedback from a digital baseband stage. During a subsequent fine gain control period, the gain of a programmable gain amplifier is adjusted separately for each frequency band used by the OFDM symbols based on a histogram bin that counts the number of output samples of an analog to digital converter whose magnitude falls within certain ranges. Coarse and fine gains are updated after each OFDM symbol.
摘要翻译： 一种用于在接收机处对OFDM符号进行信号处理的自动增益控制方法和系统。 实现两级粗略和精细的自动增益控制，可在接收机的模拟RF处理阶段调整不同的增益。 基于来自数字基带级的反馈，在第一和粗略的自动增益控制级中调整低噪声放大器和混频器的增益。 在随后的精细增益控制周期期间，可编程增益放大器的增益分别针对由OFDM符号使用的每个频带进行调整，所述频带基于对其幅度在一定范围内的模数转换器的输出样本数进行计数的直方图单元 范围。 在每个OFDM符号之后更新粗和细增益。
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公开(公告)号：US20060103473A1
公开(公告)日：2006-05-18
申请号：US11267829
申请日：2005-11-03
申请人： Behzad Razavi , Han-Chang Kang , Turgut Aytur , Ran Yan
发明人： Behzad Razavi , Han-Chang Kang , Turgut Aytur , Ran Yan
IPC分类号： H03L7/00
CPC分类号： H04B1/7163 , H04B1/7136 , H04B1/71635 , H04B1/71637 , H04B2001/71362
摘要： A direct conversion ultrawideband transceiver employing three phase locked loops (PLLs). The PLLs are preferably fixed-frequency PLLs that operate continuously, at different frequencies, with a selected frequency determined by selecting the output of one of the three PLLs. The use of three PLLs is suitable for use in a communication system employing frequency hopping across three bands or sub-bands.
摘要翻译： 采用三个锁相环（PLL）的直接转换超宽带收发器。 PLL优选地是以不同频率连续工作的固定频率PLL，选择的频率是通过选择三个PLL之一的输出来确定的。 使用三个PLL适用于在三个频带或子频带上采用跳频的通信系统。
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公开(公告)号：US20070064744A1
公开(公告)日：2007-03-22
申请号：US11505624
申请日：2006-08-16
申请人： Turgut Aytur , Stephan Brink , Ravishankar Mahadevappa , Ran Yan
发明人： Turgut Aytur , Stephan Brink , Ravishankar Mahadevappa , Ran Yan
IPC分类号： H04J3/06
CPC分类号： H04L27/2656 , H04L27/2675
摘要： Frame synchronization methods and systems suited for packet communications systems, and particularly time frequency hopping packet communication systems, are disclosed. Frame synchronization is performed by performing a first correlation on information of received symbols and performing a second correlation on results of the first correlation. In systems with repeating synchronization information modulated by a cover sequence, the results of the second correlation may be used to determine symbol numbering of symbols in a packet.
摘要翻译： 公开了适用于分组通信系统，特别是时间跳频分组通信系统的帧同步方法和系统。 通过对接收到的符号的信息执行第一相关并对第一相关的结果执行第二相关来执行帧同步。 在具有由覆盖序列调制的重复同步信息的系统中，第二相关的结果可用于确定分组中符号的符号编号。
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公开(公告)号：US20070055501A1
公开(公告)日：2007-03-08
申请号：US11506193
申请日：2006-08-16
申请人： Turgut Aytur , Stephan Brink , Ravishankar Mahadevappa , Ran Yan
发明人： Turgut Aytur , Stephan Brink , Ravishankar Mahadevappa , Ran Yan
IPC分类号： G10L19/00
CPC分类号： H04L7/042 , H04B1/7183 , H04L27/2656 , H04L27/2675 , H04L27/2676 , H04W24/00
摘要： An apparatus for and a method of performing packet detection in a receiver is provided. The apparatus is configured to determine a measure of a correlation between information of one or more received symbols and synchronization information. The apparatus is also configured to determine a measure of an energy value of one or more of the received symbols. The apparatus is also configured to determine if a packet has been detected based on the measure of the correlation and the measure of the energy value of the one or more received symbols.
摘要翻译： 提供了一种用于在接收机中执行分组检测的装置和方法。 该装置被配置为确定一个或多个接收到的符号的信息与同步信息之间的相关性的度量。 该装置还被配置为确定一个或多个接收符号的能量值的度量。 该装置还被配置为基于相关性的测量和一个或多个接收符号的能量值的测量来确定是否已经检测到分组。
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20.发明申请公开(公告)号：US20060050800A1
公开(公告)日：2006-03-09
申请号：US11205506
申请日：2005-08-16
IPC分类号： H04K1/10
CPC分类号： H04L27/2647
摘要： Systems and methods for packet detection for frequency hopping networks. Multiple receiver chains are set to different frequencies to check for packets at the different frequencies, at least until receipt of a preamble sequence in a packet is received. After detection of a packet at least some of the receiver chains are used to process received signals according to a frequency hopping pattern.
摘要翻译： 用于跳频网络的数据包检测的系统和方法。 多个接收机链被设置为不同的频率以检查在不同频率的分组，至少在接收到分组中的前导序列的接收之前。 在检测到分组之后，至少一些接收机链被用于根据跳频图案来处理接收到的信号。
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