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1. 发明申请

US20060050800A1 Packet detection in time/frequency hopped wireless communication systems 有权
标题翻译：在时间/频率跳跃的无线通信系统中的分组检测
公开(公告)号：US20060050800A1
公开(公告)日：2006-03-09
申请号：US11205506
申请日：2005-08-16
申请人： Turgut Aytur , Stephan Brink , Ravishankar Mahadevappa , Venkatesh Rajendran , Ran Yan
发明人： Turgut Aytur , Stephan Brink , Ravishankar Mahadevappa , Venkatesh Rajendran , Ran Yan
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。

2. 发明申请

US20060050698A1 Methods and systems using signaling period signals 审中-公开
标题翻译：使用信号周期信号的方法和系统
公开(公告)号：US20060050698A1
公开(公告)日：2006-03-09
申请号：US11205337
申请日：2005-08-16
申请人： Turgut Aytur , Ravishankar Mahadevappa , Venkatesh Rajendran , Stephan Brink , Ran Yan
发明人： Turgut Aytur , Ravishankar Mahadevappa , Venkatesh Rajendran , Stephan Brink , Ran Yan
IPC分类号： H04L12/56
CPC分类号： H04W72/1231 , H04W28/18 , H04W74/04 , H04W84/18
摘要： Methods and systems using information derived during a signaling period of a scheduling-based Medium Access Control protocol to adjust operation effective during data transmission periods. For example, channel estimation and transmission power adjustments are made based on indications provided by received signals.
摘要翻译：在基于调度的媒体访问控制协议的信令周期期间导出的信息的方法和系统在数据传输期间调整操作有效。例如，基于接收到的信号提供的指示来进行信道估计和发送功率调整。

3. 发明申请

US20070067704A1 Deinterleaver and dual-viterbi decoder architecture 有权
标题翻译：去交织器和双维特比解码器架构
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。

4. 发明申请

US20070058739A1 Automatic gain control for frequency-hopped OFDM 有权
标题翻译：跳频OFDM自动增益控制
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
IPC分类号： H04K1/10 , H04L27/08
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。

5. 发明申请

US20070064744A1 Frame synchronization 有权
标题翻译：帧同步
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。

6. 发明申请

US20070055501A1 Packet detection 有权
标题翻译：数据包检测
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。

7. 发明申请

US20070058693A1 Tone sensing and nulling in frequency-hopped multicarrier system 审中-公开
标题翻译：跳频多载波系统中的音调感知和归零
公开(公告)号：US20070058693A1
公开(公告)日：2007-03-15
申请号：US11494072
申请日：2006-07-27
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： H04B1/00 , H04K1/10
CPC分类号： H04L27/2626 , H04B1/713 , H04B1/715 , H04L5/0007 , H04L5/0062 , H04L25/0224 , H04L27/2602 , H04L27/2647
摘要： A method and system for removing frequencies interfering with a UWB OFDM receiver from transmission frequencies of the UWB communication. A sensing mechanism is added to the receiver that develops an energy histogram for the frequencies in a received signal and develops a tone mask for masking the interfering frequencies. The tone mask is applied after a mapping stage in the transmitter of the UWB communication and removes the interfering frequencies from the transmitted signal. Various criteria based on energy averaging are used to identify and null and remove the interfering frequencies.
摘要翻译：一种用于从UWB通信的传输频率去除干扰UWB OFDM接收机的频率的方法和系统。将感测机制添加到接收机中，以形成接收信号中的频率的能量直方图，并且形成用于掩蔽干扰频率的色调掩码。在UWB通信的发射机中的映射阶段之后应用音调掩模，并从发送的信号中去除干扰频率。使用基于能量平均的各种标准来识别和消除和消除干扰频率。

8. 发明申请

US20060212773A1 Ultrawideband architecture 审中-公开
标题翻译：超宽带架构
公开(公告)号：US20060212773A1
公开(公告)日：2006-09-21
申请号：US11361922
申请日：2006-02-23
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： H03M13/00
CPC分类号： H04L1/0054 , H04B1/71635 , H04B1/71637 , H04L1/0041 , H04L1/0059 , H04L1/006 , H04L1/0071 , H04L1/0072 , H04L5/023 , H04L27/2601 , H04L27/2626 , H04L27/2647
摘要： Architectures for ultrawideband transmitters and receivers including parallel processing chains. Some embodiments include a two byte interface with a MAC, and some embodiments include mappers mapping I-channel and Q-channel information from separate encoders.
摘要翻译：用于超宽带发射机和接收机的架构，包括并行处理链。一些实施例包括具有MAC的双字节接口，并且一些实施例包括映射器从单独的编码器映射I信道和Q信道信息。

9. 发明申请

US20070058738A1 Overlap-and-add with DC-offset correction 有权
标题翻译：重叠和加法直流偏移校正
公开(公告)号：US20070058738A1
公开(公告)日：2007-03-15
申请号：US11490850
申请日：2006-07-21
申请人： Ravishankar Mahadevappa , Stephan Brink
发明人： Ravishankar Mahadevappa , Stephan Brink
IPC分类号： H04K1/10
CPC分类号： H04L25/061 , H04B1/715 , H04L25/06 , H04L27/2601 , H04L27/2605 , H04L27/2607 , H04L27/2647
摘要： A method and system for estimating DC offset and removing the excess DC offset from samples used by an overlap-and-add operation at the receiver of OFDM symbols in UWB communication. The DC offset for each sample within the overlap-and-add interval may be estimated using a sliding window, of the size required for an FFT, operation over past samples. The DC offset may be estimated for a sample within the overlap-and-add interval and updated for the succeeding samples. A size of the overlap-and-add interval may be fixed or may be allowed to vary according to switching characteristics of an analog RF stage preceding the overlap-and-add operation.
摘要翻译：一种用于估计DC偏移并从UWB通信中的OFDM符号的接收机处的重叠和加法运算使用的样本中去除多余的DC偏移的方法和系统。可以使用具有FFT过程所需大小的滑动窗口来估计重叠和添加间隔内的每个采样的DC偏移，对以前的采样进行操作。可以针对重叠和添加间隔内的样本估计DC偏移量，并为后续样本进行更新。重叠和添加间隔的大小可以是固定的，或者可以根据重叠和添加操作之前的模拟RF级的切换特性而变化。

10. 发明申请

US20070268976A1 FREQUENCY OFFSET CORRECTION FOR AN ULTRAWIDEBAND COMMUNICATION SYSTEM 有权
标题翻译：用于超宽带通信系统的频率偏移校正
公开(公告)号：US20070268976A1
公开(公告)日：2007-11-22
申请号：US11696113
申请日：2007-04-03
申请人： Stephan Brink , Ravishankar Mahadevappa
发明人： Stephan Brink , Ravishankar Mahadevappa
IPC分类号： H04L27/28
CPC分类号： H04B1/7183
摘要： A method and a receiver system for subcarrier-specific frequency offset correction including frequency offset estimation, updating and compensation. The method includes initial frequency offset estimation in time domain using packet preamble, frequency offset compensation during channel estimation symbols using the initial frequency offset estimate, and frequency offset update tracking during header and data part both being performed in the frequency domain. The initial frequency offset estimation includes using a sum over a number of time lagged autocorrelation results, corresponding to a number of the last consecutive symbols of the preamble part of the packet with the autocorrelations being the result of a sum over a window of cross-correlations between the incoming signal and the respective packet synchronization sequence. The receiver includes receiver blocks for initial frequency offset estimation, frequency offset compensation, frequency offset update tracking and obtaining a current frequency offset estimate.
摘要翻译：一种用于子载波特定频偏校正的方法和接收机系统，包括频偏估计，更新和补偿。该方法包括使用分组前导码的时域中的初始频率偏移估计，使用初始频率偏移估计的信道估计符号期间的频率偏移补偿以及在频域中执行的报头和数据部分期间的频率偏移更新跟踪。初始频率偏移估计包括使用与多个时间滞后自相关结果相对应的和，其对应于分组的前导码部分的最后连续符号的数量，其中自相关是互相关窗口上的和的结果在输入信号和相应的分组同步序列之间。接收机包括用于初始频率偏移估计的接收器块，频率偏移补偿，频率偏移更新跟踪和获得当前频率偏移估计。

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