-
公开(公告)号：US08879676B2
公开(公告)日：2014-11-04
申请号：US13286776
申请日：2011-11-01
CPC分类号： H04L25/0212 , H04L25/022
摘要： According to various embodiments, apparatus and methods disclosed herein may be implemented in a digital communication (wired or wireless) receiver, and relate to minimizing noise in an estimated channel frequency response at the receiver for the purposes of channel equalization. The disclosed apparatus and methods may include determining a channel impulse response based on an estimated channel frequency response. The estimated channel frequency response, the channel impulse response, or both may include noise. An impulse response mask may be determined based on the channel impulse response, and further applied to the channel impulse response to obtain a noise-reduced channel impulse response, which may be Fourier transformed to obtain a noise-reduced channel frequency response.
摘要翻译： 根据各种实施例，本文公开的装置和方法可以在数字通信（有线或无线）接收机中实现，并且涉及为了信道均衡的目的，在接收机处估计的信道频率响应中的噪声最小化。 所公开的装置和方法可以包括基于估计的信道频率响应来确定信道脉冲响应。 估计的信道频率响应，信道脉冲响应或二者可以包括噪声。 可以基于信道脉冲响应来确定脉冲响应掩码，并且进一步应用于信道脉冲响应以获得噪声降低的信道脉冲响应，其可被傅立叶变换以获得噪声降低的信道频率响应。
-
2.发明授权Methods and systems to resolve cyclic ambiguity of a channel impulse response 有权解决信道脉冲响应的循环模糊度的方法和系统公开(公告)号：US08406343B2
公开(公告)日：2013-03-26
申请号：US12868366
申请日：2010-08-25
申请人： Thushara Hewavithana , Bernard Arambepola , Parveen K. Shukla , Sahan S. Gamage , Vinesh Bhunjun
发明人： Thushara Hewavithana , Bernard Arambepola , Parveen K. Shukla , Sahan S. Gamage , Vinesh Bhunjun
CPC分类号： H04L25/022 , H04L25/0212 , H04L25/0228 , H04L27/2647
摘要： Methods and systems to resolve cyclic ambiguity of a scattered-pilot based channel impulse response as a function of transmission parameter signalling (TPS), such as in a single frequency network, including to zero-pad a first orientation of the channel impulse response to an interval of an effective symbol duration of the multi-carrier signal, compute a channel frequency response from the zero-padded first orientation of the channel impulse response, and correlate components of the channel frequency response corresponding to frequencies of TPS carriers with raw channel frequency response data of obtained from the TPS carriers. Frequency response components of multiple zero-padded orientations of the channel impulse response may be correlated with the raw TPS carrier data to identify an optimum orientation of the channel impulse response. Frequency response components of subsequent zero-padded orientations may be iteratively computed from components of preceding orientations.
摘要翻译： 解决作为传输参数信令（TPS）的函数的基于分散导频的信道脉冲响应的循环模糊度的方法和系统，诸如在单个频率网络中，包括将信道脉冲响应的第一定向零填补到 多载波信号的有效符号持续时间的间隔，从信道脉冲响应的零填充的第一取向计算信道频率响应，并且将与TPS载波的频率相对应的信道频率响应的分量与原始信道频率响应相关联 从TPS载体获得的数据。 信道脉冲响应的多个零填充取向的频率响应分量可以与原始TPS载波数据相关，以识别信道脉冲响应的最佳取向。 随后的零填充取向的频率响应分量可以从先前方向的分量迭代计算。
-
3.发明申请公开(公告)号：US20120051471A1
公开(公告)日：2012-03-01
申请号：US12868366
申请日：2010-08-25
申请人： Thushara Hewavithana , Bernard Arambepola , Parveen K. Shukla , Sahan S. Gamage , Vinesh Bhunjun
发明人： Thushara Hewavithana , Bernard Arambepola , Parveen K. Shukla , Sahan S. Gamage , Vinesh Bhunjun
IPC分类号： H04L27/06
CPC分类号： H04L25/022 , H04L25/0212 , H04L25/0228 , H04L27/2647
摘要： Methods and systems to resolve cyclic ambiguity of a scattered-pilot based channel impulse response as a function of transmission parameter signalling (TPS), such as in a single frequency network, including to zero-pad a first orientation of the channel impulse response to an interval of an effective symbol duration of the multi-carrier signal, compute a channel frequency response from the zero-padded first orientation of the channel impulse response, and correlate components of the channel frequency response corresponding to frequencies of TPS carriers with raw channel frequency response data of obtained from the TPS carriers. Frequency response components of multiple zero-padded orientations of the channel impulse response may be correlated with the raw TPS carrier data to identify an optimum orientation of the channel impulse response. Frequency response components of subsequent zero-padded orientations may be iteratively computed from components of preceding orientations.
摘要翻译： 解决作为传输参数信令（TPS）的函数的基于分散导频的信道脉冲响应的循环模糊度的方法和系统，诸如在单个频率网络中，包括将信道脉冲响应的第一定向零填补到 多载波信号的有效符号持续时间的间隔，从信道脉冲响应的零填充的第一取向计算信道频率响应，并且将与TPS载波的频率相对应的信道频率响应的分量与原始信道频率响应相关联 从TPS载体获得的数据。 信道脉冲响应的多个零填充取向的频率响应分量可以与原始TPS载波数据相关，以识别信道脉冲响应的最佳取向。 随后的零填充取向的频率响应分量可以从先前方向的分量迭代计算。
-
公开(公告)号：US20150139351A1
公开(公告)日：2015-05-21
申请号：US14081586
申请日：2013-11-15
CPC分类号： H04L27/2627 , G06F7/768 , G06F12/00 , H03M13/271 , H04L1/0071 , H04L27/2628 , H04L27/263 , H04L27/2634
摘要： The disclosure generally relates to a method and apparatus for frequency interleaving. Specifically, an embodiment of the disclosure relates to a communication system having one or more antennas, a radio, a memory circuit, and a processor circuit. The antennas can be used to communicate signals or to comply with different transmission protocols. The radio can be configured to send and receive radio signals. The memory can communicate with the processor circuit and contain instructions for the processor circuit to write data carriers along a plurality of rows and columns of a 2-D store in bit-reversed order and read the columns of 2-D store.
摘要翻译： 本公开一般涉及用于频率交织的方法和装置。 具体地，本公开的实施例涉及具有一个或多个天线，无线电，存储器电路和处理器电路的通信系统。 天线可用于传送信号或符合不同的传输协议。 收音机可以配置为发送和接收无线电信号。 存储器可以与处理器电路进行通信，并且包含用于处理器电路的指令，以比特反转顺序沿着2D存储的多个行和列写入数据载体，并读取2-D存储的列。
-
公开(公告)号：US20130107996A1
公开(公告)日：2013-05-02
申请号：US13286776
申请日：2011-11-01
CPC分类号： H04L25/0212 , H04L25/022
摘要： According to various embodiments, apparatus and methods disclosed herein may be implemented in a digital communication (wired or wireless) receiver, and relate to minimizing noise in an estimated channel frequency response at the receiver for the purposes of channel equalization. The disclosed apparatus and methods may include determining a channel impulse response based on an estimated channel frequency response. The estimated channel frequency response, the channel impulse response, or both may include noise. An impulse response mask may be determined based on the channel impulse response, and further applied to the channel impulse response to obtain a noise-reduced channel impulse response, which may be Fourier transformed to obtain a noise-reduced channel frequency response.
摘要翻译： 根据各种实施例，本文公开的装置和方法可以在数字通信（有线或无线）接收机中实现，并且涉及为了信道均衡的目的，在接收机处估计的信道频率响应中的噪声最小化。 所公开的装置和方法可以包括基于估计的信道频率响应来确定信道脉冲响应。 估计的信道频率响应，信道脉冲响应或二者可以包括噪声。 可以基于信道脉冲响应来确定脉冲响应掩码，并且进一步应用于信道脉冲响应以获得噪声降低的信道脉冲响应，其可被傅立叶变换以获得噪声降低的信道频率响应。
-
公开(公告)号：US20130107992A1
公开(公告)日：2013-05-02
申请号：US13286326
申请日：2011-11-01
IPC分类号： H04L27/06
CPC分类号： H04L27/066 , H04L2027/0044 , H04L2027/0067
摘要： According to various embodiments, apparatus and methods disclosed herein include computing phase error of a received signal based on an estimate of a first component (e.g., in-phase component) of a transmitted signal and an analytic representation of the estimate of the first component of the transmitted signal. The analytic representation of the estimate of the first component of the transmitted signal may represent an estimate of a second component (e.g., quadrature phase component) of the transmitted signal. The analytic representation of the estimated first component may be computed using at least one of a Hilbert transform or Fourier transform on the estimated first component of the transmitted signal.
摘要翻译： 根据各种实施例，本文公开的装置和方法包括基于发射信号的第一分量（例如，同相分量）的估计和第一分量的估计的分析表示来计算接收信号的相位误差 发送信号。 发射信号的第一分量的估计的分析表示可以表示发射信号的第二分量（例如，正交相位分量）的估计。 估计的第一分量的分析表示可以使用发射信号的估计的第一分量上的希尔伯特变换或傅里叶变换中的至少一个来计算。
-
公开(公告)号：US09130787B2
公开(公告)日：2015-09-08
申请号：US13185091
申请日：2011-07-18
CPC分类号： H04L25/022 , H04L1/005 , H04L25/025 , H04L25/03159 , H04L2025/03382 , H04L2025/0342
摘要： According to various embodiments, devices and methods disclosed herein include performing, using a processor, a linear operation on a first plurality of channel frequency responses and a plurality of corresponding predictor coefficients to estimate a new channel frequency response. Each of the plurality of corresponding predictor coefficients may be updated based on an error value and a second plurality of channel frequency responses to obtain an updated predictor coefficient. The error value may be computed based on an estimated current channel frequency response and a predicted current channel frequency response. The new channel frequency response may be used to equalize a received modulated signal including a single-carrier modulated signal, e.g., a signal modulated using a vestigial sideband modulation scheme, or a quadrature amplitude modulation scheme.
摘要翻译： 根据各种实施例，本文公开的装置和方法包括使用处理器对第一多个信道频率响应和多个对应的预测器系数进行线性运算来估计新的信道频率响应。 可以基于误差值和第二多个通道频率响应来更新多个对应的预测器系数中的每一个，以获得更新的预测器系数。 可以基于估计的当前信道频率响应和预测的当前信道频率响应来计算误差值。 新的信道频率响应可以用于均衡包括单载波调制信号的接收调制信号，例如使用残留边带调制方案调制的信号或正交幅度调制方案。
-
8.发明授权Orthogonal frequency division multiplex (OFDM) receiver with phase noise mitigation and reduced latency 有权正交频分复用（OFDM）接收机，具有相位噪声缓解和降低的延迟公开(公告)号：US09054933B2
公开(公告)日：2015-06-09
申请号：US13997691
申请日：2011-12-20
CPC分类号： H04L27/2649 , H04L1/0036 , H04L27/265 , H04L27/2657 , H04L27/2675
摘要： A system according to one embodiment includes a demodulator configured to receive an orthogonal frequency division multiplexed (OFDM) modulated signal comprising a current symbol and a sequence of previous symbols, each of the symbols comprising one or more pilot sub-carriers and one or more data sub-carriers; a phase angle computation circuit coupled to the demodulator, the phase angle computation circuit configured to compute a first mean, the first mean computed from the phase angle of one or more of the pilot sub-carriers of a predetermined number of the previous symbols; a predictive filter circuit coupled to the phase angle computation circuit, the predictive filter circuit configured to compute a second mean, the second mean estimating the phase angle of one or more sub-carriers of the current symbol, the estimation based on the first mean; and a phase noise cancelling circuit coupled to the predictive filter circuit, the phase noise cancelling circuit configured to correct the phase of one or more sub-carriers of the current symbol based on the second mean.
摘要翻译： 根据一个实施例的系统包括解调器，其被配置为接收包括当前符号和先前符号序列的正交频分复用（OFDM）调制信号，每个符号包括一个或多个导频子载波和一个或多个数据 子载体; 耦合到所述解调器的相位角计算电路，所述相位角计算电路被配置为计算第一平均值，所述第一平均值是从预定数量的先前符号的一个或多个导频子载波的相位角计算的第一平均值; 耦合到所述相位角计算电路的预测滤波器电路，所述预测滤波器电路被配置为计算第二平均值，所述第二平均值估计所述当前符号的一个或多个子载波的相位角，所述估计基于所述第一均值; 以及耦合到所述预测滤波器电路的相位噪声消除电路，所述相位噪声消除电路被配置为基于所述第二均值来校正所述当前符号的一个或多个子载波的相位。
-
9.发明授权Channel estimation for DVB-T2 demodulation using an adaptive prediction technique 有权使用自适应预测技术的DVB-T2解调的信道估计公开(公告)号：US08842750B2
公开(公告)日：2014-09-23
申请号：US12974582
申请日：2010-12-21
CPC分类号： H04L25/022 , H04L25/0226 , H04L25/0232 , H04L25/025 , H04L27/2647
摘要： According to various embodiments, a method is disclosed that includes receiving an orthogonal frequency-division multiplexing (OFDM) modulated signal at a modulator; filtering the received modulated signal using a plurality of sets of filter coefficients with a linear predictor algorithm; and estimating a channel frequency response based on the filtering.
摘要翻译： 根据各种实施例，公开了一种在调制器处接收正交频分复用（OFDM）调制信号的方法; 使用具有线性预测器算法的多组滤波器系数对所接收的调制信号进行滤波; 以及基于所述滤波来估计信道频率响应。
-
10.发明申请公开(公告)号：US20140247782A1
公开(公告)日：2014-09-04
申请号：US14197208
申请日：2014-03-04
CPC分类号： H04L1/004 , H04L1/0041 , H04L5/0046 , H04L27/0008 , H04L27/2634
摘要： Mixed mode constellation mapping to map a data block to a block of sub-carriers based on a configurable set of one or more constellation mapping schemes, and corresponding mixed mode least likelihood ratio (LLR) de-mapping based on the configurable set of one or more modulation schemes. The set may be configurable to include multiple modulation schemes to provide to a SEvSNR measure that is a non-weighted or weighted average of SEvSNR measures of the multiple modulation schemes. Mixed mode constellation mapping may be useful be configurable to control spectral efficiency versus SNR (SEvSNR) over a range of SNR with relatively fine SNR granularity, and may be configurable to control SEvSNR over a range of SNR at a fixed FEC code rate, which may include a highest available or highest permitted code rate.
摘要翻译： 基于可配置的一个或多个星座映射方案集合以及相应的混合模式最小似然比（LLR）去映射的混合模式星座图映射，以将数据块映射到子载波块，基于可配置的一个或多个 更多的调制方案。 该集合可以被配置为包括多个调制方案以提供SEvSNR度量，其是多个调制方案的SEvSNR度量的非加权或加权平均。 混合模式星座映射可能是有用的，可以被配置为在具有相对精细的SNR粒度的SNR范围内控制频谱效率与SNR（SEvSNR），并且可以被配置为以固定的FEC码率在SNR范围内控制SEvSNR， 包括最高可用或最高允许码率。
-
-
-
-
-
-
-
-
-
搜索结果
23 条记录 (耗时 0.013 秒)
