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1. 发明申请

US20090097597A1 Methods For Coarse Frequency Offset Estimation For Orthogonal Frequency Division Multiplexing Schemes 审中-公开
标题翻译：用于正交频分复用方案的粗频偏移估计方法
公开(公告)号：US20090097597A1
公开(公告)日：2009-04-16
申请号：US12252344
申请日：2008-10-15
申请人： Junqiang Li , Baoguo Yang , Yue Chen
发明人： Junqiang Li , Baoguo Yang , Yue Chen
IPC分类号： H04L27/06
CPC分类号： H04L27/2675 , H04L27/2659
摘要： The present invention provides methods for coarse frequency offset estimation, where those methods may comprise the steps of: removing fading channel impact by calculating accumulated correlation values; removing CCI and phase rotation due to large sampling offset by calculating an accumulation metric as a function of the accumulated correlation values, CCI peak, and initial sampling offset, ξ; and finding the coarse frequency offset as a function of the accumulation metric.
摘要翻译：本发明提供了粗频偏估计的方法，其中这些方法可以包括以下步骤：通过计算累积相关值消除衰落信道影响; 通过计算累积度量作为累积相关值，CCI峰值和初始采样偏移量xi的函数来消除由于大的采样偏移导致的CCI和相位旋转; 并且找出作为累积度量的函数的粗略频率偏移。

2. 发明申请

US20090097578A1 Methods for Decoding TPS Carriers in OFDM Systems 审中-公开
标题翻译： OFDM系统中解码TPS载波的方法
公开(公告)号：US20090097578A1
公开(公告)日：2009-04-16
申请号：US12253015
申请日：2008-10-16
申请人： Junqiang Li , Baoguo Yang , Yue Chen
发明人： Junqiang Li , Baoguo Yang , Yue Chen
IPC分类号： H04L27/28
CPC分类号： H04L27/2656 , H04L5/0007 , H04L5/005 , H04L5/0092 , H04L27/2613
摘要： The present invention relates to methods for TPS demodulation, frame boundary detection, and TPS decoding. In particular, the present invention relates to a method for finding a frame boundary in demodulating an OFDM signal, comprising the steps of: differentially demodulating each symbol to generate differentially demodulated symbol bits; and finding a sync word position when the scatter pilot position equals zero, wherein the sync word position is set as the frame boundary.
摘要翻译：本发明涉及TPS解调，帧边界检测和TPS解码的方法。具体地，本发明涉及一种在解调OFDM信号中找到帧边界的方法，包括以下步骤：对每个符号进行差分解调以产生差分解调的符号位; 以及当散射导频位置等于零时找到同步字位置，其中同步字位置被设置为帧边界。

3. 发明申请

US20090122918A1 Methods for Compensating for I/Q Imbalance in OFDM Systems 审中-公开
标题翻译： OFDM系统补偿I / Q不平衡的方法
公开(公告)号：US20090122918A1
公开(公告)日：2009-05-14
申请号：US12266534
申请日：2008-11-06
申请人： Junqiang Li , Baoguo Yang , Yue Chen
发明人： Junqiang Li , Baoguo Yang , Yue Chen
IPC分类号： H04L25/06
CPC分类号： H04L27/2647 , H04L27/0014 , H04L2027/0024
摘要： The present invention relates to methods for demodulating orthogonal frequency division multiplexing (OFDM) modulated signals. In particular, this invention relates to methods for in-phase (I) and quadrature phase (Q) imbalance compensation in OFDM systems. For example, the present invention relates to methods for calculating an IQ imbalance compensated signal from a received signal, comprising the steps of: removing DC from the received signal; calculating an autocorrelation matrix of IQ signal vector of the received signal; estimating IQ imbalance compensation values, K1 and K2, as a function of an amplitude imbalance, g, and a phase imbalance, θ; and calculating an IQ compensated signal as a function of the estimated K1 and K2.
摘要翻译：本发明涉及用于解调正交频分复用（OFDM）调制信号的方法。特别地，本发明涉及OFDM系统中的同相（I）和正交相（Q）不平衡补偿的方法。例如，本发明涉及从接收信号计算IQ不平衡补偿信号的方法，包括以下步骤：从接收信号中去除DC; 计算接收信号的IQ信号向量的自相关矩阵; 估计IQ不平衡补偿值K1和K2作为幅度不平衡g和相位不平衡θ的函数; 以及计算作为估计的K1和K2的函数的IQ补偿信号。

4. 发明申请

US20090168930A1 Methods and Systems for Doppler Estimation and Adaptive Channel Filtering in a Communication System 审中-公开
标题翻译：通信系统中多普勒估计和自适应信道滤波的方法和系统
公开(公告)号：US20090168930A1
公开(公告)日：2009-07-02
申请号：US12345658
申请日：2008-12-29
申请人： Junqiang Li , Baoguo Yang , Yue Chen
发明人： Junqiang Li , Baoguo Yang , Yue Chen
IPC分类号： H03D1/04
CPC分类号： H04L1/0026
摘要： A method for Doppler shift estimation for channel estimation of a received signal, comprising the steps of: calculating time domain correlations; providing a Hamming window over the calculated time domain correlations; calculating a power spectrum by using FFT; calculating an adaptive threshold based on a noise floor and an average power density calculated from the power spectrum; and estimating a Doppler shift based on the adaptive threshold.
摘要翻译：一种用于接收信号的信道估计的多普勒频移估计的方法，包括以下步骤：计算时域相关; 在计算的时域相关性上提供汉明窗; 使用FFT计算功率谱; 基于从功率谱计算的噪声基底和平均功率密度来计算自适应阈值; 以及基于所述自适应阈值估计多普勒频移。

5. 发明申请

US20090097596A1 Methods and Systems for Impulse Noise Compensation for OFDM Systems 审中-公开
标题翻译： OFDM系统脉冲噪声补偿方法与系统
公开(公告)号：US20090097596A1
公开(公告)日：2009-04-16
申请号：US12253026
申请日：2008-10-16
申请人： Junqiang Li , Baoguo Yang , Yue Chen
发明人： Junqiang Li , Baoguo Yang , Yue Chen
IPC分类号： H04L27/06
CPC分类号： H04L25/03203 , H04L25/0212 , H04L25/0224 , H04L25/03292 , H04L2025/03414
摘要： Methods and systems are provided to reduce the effects of impulse noise in decoding a received OFDM signal by reducing the bit error number in burst error positions and by reducing the impulse noise contribution to channel estimation. In order to reduce the performance degradation due to impulse noise, it is important to find the position or the OFDM symbol where impulse noise occurs. The high noise variance gain can then be used for a Viterbi decoder to reduce the bit error number in burst error position, and also to reduce the contribution of the channel estimation by impulse noise in future channel estimations. Accordingly, the performance of the system can be greatly improved.
摘要翻译：提供了方法和系统，以通过减少突发错误位置中的位错误数量以及减少对信道估计的脉冲噪声贡献来减少脉冲噪声对接收的OFDM信号进行解码的影响。为了减少由于脉冲噪声引起的性能下降，重要的是要找到发生脉冲噪声的位置或OFDM符号。然后可以将高噪声方差增益用于维特比解码器以减少突发错误位置中的位错误数量，并且还可以减少未来信道估计中脉冲噪声对信道估计的贡献。因此，可以大大提高系统的性能。

6. 发明申请

US20110182338A1 CO-CHANNEL INTERFERENCE AND ADJACENT CHANNEL INTERFERENCE DETECTION AND SUPPRESSION 审中-公开
标题翻译： CO通道干扰和相干通道干扰检测和抑制
公开(公告)号：US20110182338A1
公开(公告)日：2011-07-28
申请号：US13003053
申请日：2009-07-07
申请人： Junqiang Li , Baoguo Yang
发明人： Junqiang Li , Baoguo Yang
IPC分类号： H04B17/00
CPC分类号： H04B1/109
摘要： Methods having corresponding apparatus and computer-readable media comprise: receiving an input signal, wherein the input signal includes a DVB-H signal; detecting co-channel interference (CCI) in the signal; suppressing the CCI in the input signal; and demodulating the DVB-H signal after suppressing the CCI.
摘要翻译：具有对应装置和计算机可读介质的方法包括：接收输入信号，其中所述输入信号包括DVB-H信号; 检测信号中的同信道干扰（CCI）; 抑制输入信号中的CCI; 并在抑制CCI之后解调DVB-H信号。

7. 发明申请

US20110228886A1 FAST LINK RE-SYNCHRONIZATION FOR TIME-SLICED OFDM SIGNALS 审中-公开
标题翻译：用于时间延迟的OFDM信号的快速链路重新同步
公开(公告)号：US20110228886A1
公开(公告)日：2011-09-22
申请号：US13003060
申请日：2009-07-08
申请人： Junqiang Li , Baoguo Yang
发明人： Junqiang Li , Baoguo Yang
IPC分类号： H04L7/04
CPC分类号： H04L1/0045 , H04L27/2656 , H04L27/2662
摘要： Methods having corresponding apparatus and computer-readable media comprise: receiving an estimated frame index, and an estimated symbol index, for a time-sliced OFDM signal; identifying a plurality of possible frame indexes, and a plurality of possible symbol indexes, based on the estimated frame index and the estimated symbol index; selecting a plurality of possible forward error correction code offsets based on the possible frame indexes and the possible symbol indexes; and selecting one of the possible frame indexes, and one of the possible symbol indexes, based on the possible forward error correction code offsets and a SYNC byte of the time-sliced OFDM signal.
摘要翻译：具有对应装置和计算机可读介质的方法包括：对时分片OFDM信号接收估计帧索引和估计符号索引; 基于估计的帧索引和所估计的符号索引来识别多个可能的帧索引和多个可能的符号索引; 基于可能的帧索引和可能的符号索引来选择多个可能的前向纠错码偏移; 并且基于时分片OFDM信号的可能的前向纠错码偏移和SYNC字节来选择可能的帧索引之一和可能的符号索引中的一个。

8. 发明申请

US20090103667A1 Methods for Modified Signal Acquisition for OFDM Schemes 审中-公开
标题翻译： OFDM方案修改信号采集方法
公开(公告)号：US20090103667A1
公开(公告)日：2009-04-23
申请号：US12253927
申请日：2008-10-17
申请人： Jianxuan Du , Yue Chen , Baoguo Yang
发明人： Jianxuan Du , Yue Chen , Baoguo Yang
IPC分类号： H04L27/06
CPC分类号： H04L27/2647 , H04H60/07 , H04L27/2656 , H04L27/2663 , H04L27/2678
摘要： This invention relates to methods for determining coarse symbol timing and mode detection by using CP correlation-based techniques. In particular, this invention relates to methods for determining symbol timing, frame timing, and system mode for signal acquisition, comprising the steps of: detecting symbol timing and system mode based on cyclic prefix correlation; and determining a null symbol as a function of a pre-defined number of consecutive symbols and using said null symbol to determine frame timing.
摘要翻译：本发明涉及通过使用基于CP相关的技术来确定粗符号定时和模式检测的方法。具体地说，本发明涉及用于确定信号采集的符号定时，帧定时和系统模式的方法，包括以下步骤：基于循环前缀相关检测符号定时和系统模式; 以及确定作为预定数量的连续符号的函数的空符号，并且使用所述空符号来确定帧定时。

9. 发明申请

US20060198434A1 Equalizer training method using re-encoded bits and known training sequences 失效
公开(公告)号：US20060198434A1
公开(公告)日：2006-09-07
申请号：US11271692
申请日：2005-11-10
申请人： Yue Chen , Arkady Molev-Shteiman , Aric Heiman , Nelson Sollenberger , Iluaiyu (Ilanks) Zeng , Baoguo Yang
发明人： Yue Chen , Arkady Molev-Shteiman , Aric Heiman , Nelson Sollenberger , Iluaiyu (Ilanks) Zeng , Baoguo Yang
IPC分类号： H03K5/159 , H03H7/30 , H04B1/10
CPC分类号： H04L25/03171 , H04L25/03133
摘要： The present invention provides a multi-branch equalizer processing module operable to cancel interference associated with received radio frequency (RF) burst(s). This multi-branch equalizer processing module includes both a first equalizer processing branch and a second equalizer processing branch. The first equalizer processing branch is operable to be trained based upon known training sequences and equalize the received RF burst. This results in soft samples or decisions which in turn may be converted to data bits. The soft samples are processed with a de-interleaver and channel decoder, where the combination is operable to produce a decoded frame of data bits from the soft samples. A re-encoder may re-encode the decoded frame to produce re-encoded or at least partially re-encoded data bits. An interleaver then processes the at least partially re-encoded data bits to produce and at least partially re-encoded burst. The second equalizer processing branch uses the at least partially re-encoded data bits to train linear equalizer(s) within-the second equalizer processing branch. A buffer may initially store the received RF burst(s), which are retrieved and equalized by the second equalizer processing branch once the linear equalizer(s) are trained. This results in alternate soft samples or decisions which in turn may be converted to alternate data bits. The alternate soft samples are processed with the de-interleaver and channel decoder, where the combination is operable to produce an alternate decoded frame of data bits from the alternate soft samples. This allows interfering signals to be cancelled and more accurate processing of the received RF bursts to occur.

10. 发明申请

US20060198432A1 Single antenna interference cancellation within a wireless terminal 失效
标题翻译：无线终端内的单天线干扰消除
公开(公告)号：US20060198432A1
公开(公告)日：2006-09-07
申请号：US11150925
申请日：2005-06-13
申请人： Huaiyu (Hanks) Zeng , Baoguo Yang , Arkady Molev-Shteiman , Arie Heiman , Yue Chen , Nelson R. Sollenberger
发明人： Huaiyu (Hanks) Zeng , Baoguo Yang , Arkady Molev-Shteiman , Arie Heiman , Yue Chen , Nelson R. Sollenberger
IPC分类号： H03H7/30 , H03D1/04
CPC分类号： H04L25/03171 , H04L25/03133
摘要： The present invention provides a multi-branch equalizer processing module operable to cancel interference associated with received radio frequency (RF) burst(s). This multi-branch equalizer processing module includes both a first equalizer processing branch and a second equalizer processing branch. The first equalizer processing branch is operable to be trained based upon known training sequences and equalize the received RF burst. This results in soft samples or decisions which in turn may be converted to data bits. The soft samples are processed with a de-interleaver and channel decoder, where the combination is operable to produce a decoded frame of data bits from the soft samples. A re-encoder may re-encode the decoded frame to produce re-encoded or at least partially re-encoded data bits. An interleaver then processes the at least partially re-encoded data bits to produce and at least partially re-encoded burst. The second equalizer processing branch uses the at least partially re-encoded data bits to train linear equalizer(s) within the second equalizer processing branch. A buffer may initially store the received RF burst(s), which are retrieved and equalized by the second equalizer processing branch once the linear equalizer(s) are trained. This results in alternate soft samples or decisions which in turn may be converted to alternate data bits. The alternate soft samples are processed with the de-interleaver and channel decoder, where the combination is operable to produce an alternate decoded frame of data bits from the alternate soft samples. This allows interfering signals to be cancelled and more accurate processing of the received RF bursts to occur.
摘要翻译：本发明提供一种多分支均衡器处理模块，其可操作以消除与接收的射频（RF）突发相关联的干扰。该多分支均衡器处理模块包括第一均衡器处理分支和第二均衡器处理分支。第一均衡器处理分支可操作以基于已知的训练序列进行训练，并均衡所接收的RF突发。这导致软样本或决策，而这些样本或决定又可以转换为数据位。软采样用解交织器和信道解码器处理，其中组合可操作以从软样本产生解码的数据比特帧。重新编码器可以对解码的帧进行重新编码，以产生重新编码或至少部分重新编码的数据比特。交织器然后处理至少部分重新编码的数据比特以产生和至少部分地重新编码突发。第二均衡器处理分支使用至少部分重新编码的数据比特来训练第二均衡器处理分支内的线性均衡器。缓冲器可以初始地存储所接收的RF突发，一旦训练了线性均衡器，其将被第二均衡器处理分支检索和均衡。这导致交替的软样本或决定，这又可以转换为备用数据位。用去交织器和信道解码器处理替代软样本，其中组合可操作以从备选软样本产生替代解码的数据比特帧。这允许消除干扰信号并且发生接收的RF突发的更精确的处理。

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