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1.发明授权Symmetric pilot processing for robust timing offset and frequency offset estimation in ISDB-T and ISDB-TSB receivers 有权ISDB-T和ISDB-TSB接收机的鲁棒定时偏移和频偏估计的对称导频处理公开(公告)号：US07912157B2
公开(公告)日：2011-03-22
申请号：US12062661
申请日：2008-04-04
IPC分类号： H04L27/06
CPC分类号： H04L27/2657 , H04L27/0014 , H04L27/2662 , H04L2027/0026 , H04L2027/0067
摘要： Timing and frequency offset processing in sub-carriers is performed in an Integrated Services Digital Broadcasting-Terrestrial (ISDB-T) receiver system. Sub-carriers are divided into two sub-sets, where the sub-sets contain an equal number of sub-carriers. Subsequently bad sub-carriers are removed, if present, from first sub-set of the sub-sets, and corresponding sub-carriers from a second sub-set of the sub-sets are also removed. Further, a phase difference on each sub-carrier from each sub-set is computed, and mean phase differences of each of the sub-sets are computed. Furthermore, frequency offset is computed by averaging the mean phase differences of the sets.
摘要翻译： 子载波中的定时和频率偏移处理在综合业务数字广播地面（ISDB-T）接收机系统中执行。 子载波被分成两个子集，其中子集包含相等数量的子载波。 随后，从子集的第一子集中去除坏子载波（如果存在），并且还删除来自子集的第二子集的对应子载波。 此外，计算每个子集合中的每个子载波的相位差，并且计算每个子集的平均相位差。 此外，通过对集合的平均相位差进行平均来计算频率偏移。
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2.发明授权Time and frequency domain based approaches for fine timing and frequency estimations 有权基于时间和频域的精确定时和频率估计方法公开(公告)号：US07889803B2
公开(公告)日：2011-02-15
申请号：US12034717
申请日：2008-02-21
IPC分类号： H04L27/28
CPC分类号： H04L25/0224 , H04L25/0204 , H04L25/0232 , H04L27/2657 , H04L27/2662 , H04L27/2675 , H04L27/2676 , H04L27/2695
摘要： A method and apparatus for estimating timing and frequency offsets in an ISDB-T and ISDB-TSB receiver. In different embodiments, the method comprises estimating timing and frequency offsets by different estimation processes; assigning weights to the timing and frequency offsets according to the channel condition; and calculating timing and frequency offsets using the estimates of timing and frequency offsets and the weights.
摘要翻译： 用于估计ISDB-T和ISDB-TSB接收机中的定时和频率偏移的方法和装置。 在不同的实施例中，该方法包括通过不同的估计过程估计定时和频率偏移; 根据信道条件向定时和频率偏移分配权重; 以及使用定时和频率偏移和权重的估计来计算定时和频率偏移。
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3.发明授权Look-up table based approach for layer combining in ISDB-T and ISDB-TSB receivers 有权在ISDB-T和ISDB-TSB接收机中进行层组合的基于查找表的方法公开(公告)号：US07822039B2
公开(公告)日：2010-10-26
申请号：US12107963
申请日：2008-04-23
IPC分类号： H04L12/28
CPC分类号： H04L1/0016 , H04L27/2647
摘要： A method of layer combining based on generating a look-up table in an Integrated Services Digital Broadcasting (ISDB) receiver includes obtaining a transmission parameter configuration, generating the look-up table based on the transmission parameter configuration, assembling a null transport stream packets and a valid transport stream packets from a plurality of layers of a multiplexing frame, and generating a completed transport packet stream using the look-up table. The receiver may generate the look-up table by at least one of generating the look-up table in real time or selecting from a look-up table set based on the transmission parameter configuration. The transmission parameter configuration may include at least one of a transmission mode, a guard interval, a modulation, and a coding rate. The look-up table may define an order of the null transport stream packets and the valid transport stream packets from the plurality of layers in the multiplexing frame.
摘要翻译： 基于在综合业务数字广播（ISDB）接收机中生成查询表的层组合方法包括获得传输参数配置，基于传输参数配置生成查找表，组合空传输流分组和 来自复用帧的多个层的有效传输流分组，以及使用查找表生成完成的传输分组流。 接收机可以通过实时生成查找表中的至少一个或者基于传输参数配置从查找表集合中选择来生成查找表。 传输参数配置可以包括传输模式，保护间隔，调制和编码速率中的至少一个。 查找表可以在复用帧中定义来自多个层的空传输流分组和有效传输流分组的顺序。
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4.发明申请SYMMETRIC PILOT PROCESSING FOR ROBUST TIMING OFFSET AND FREQUENCY OFFSET ESTIMATION IN ISDB-T AND ISDB-TSB RECEIVERS 有权ISDB-T和ISDB-TSB接收机的稳健时序偏移和频率偏移估计的对称导频处理公开(公告)号：US20090252262A1
公开(公告)日：2009-10-08
申请号：US12062661
申请日：2008-04-04
IPC分类号： H04L27/06
CPC分类号： H04L27/2657 , H04L27/0014 , H04L27/2662 , H04L2027/0026 , H04L2027/0067
摘要： Timing and frequency offset processing in sub-carriers is performed in an Integrated Services Digital Broadcasting-Terrestrial (ISDB-T) receiver system. Sub-carriers are divided into two sub-sets, where the sub-sets contain an equal number of sub-carriers. Subsequently bad sub-carriers are removed, if present, from first sub-set of the sub-sets, and corresponding sub-carriers from a second sub-set of the sub-sets are also removed. Further, a phase difference on each sub-carrier from each sub-set is computed, and mean phase differences of each of the sub-sets are computed. Furthermore, frequency offset is computed by averaging the mean phase differences of the sets.
摘要翻译： 子载波中的定时和频率偏移处理在综合业务数字广播地面（ISDB-T）接收机系统中执行。 子载波被分成两个子集，其中子集包含相等数量的子载波。 随后，从子集的第一子集中去除坏子载波（如果存在），并且还删除来自子集的第二子集的对应子载波。 此外，计算每个子集合中的每个子载波的相位差，并且计算每个子集的平均相位差。 此外，通过对集合的平均相位差进行平均来计算频率偏移。
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5.发明申请LOW COMPLEXITY HIGH PERFORMANCE TMCC ACQUISITION IN ISDB-T AND ISDB-TSB RECEIVERS 有权ISDB-T和ISDB-TSB接收机的低复杂性高性能TMCC采集公开(公告)号：US20090232264A1
公开(公告)日：2009-09-17
申请号：US12046956
申请日：2008-03-12
CPC分类号： H04H20/95 , H04H40/27 , H04H60/73 , H04L27/0014 , H04L27/22 , H04L2027/0067
摘要： A method of TMCC information acquisition in an ISDB-T/TSB receiver comprises detecting coarse frequency offset in the receiver to identify bins that have TMCC information; and acquiring TMCC and symbol number information from the identified bins. The detecting process may be conducted using different methods and the acquiring process may be conducted using different methods. The TMCC information acquisition method saves memory space and provides enhanced performance by using coarse frequency offset to identify the bins that have TMCC information and obtaining the TMCC and symbol number information from the identified bins.
摘要翻译： 在ISDB-T / TSB接收机中的TMCC信息获取的方法包括检测接收机中的粗频偏移以识别具有TMCC信息的箱; 并从识别的箱中获取TMCC和符号号信息。 可以使用不同的方法进行检测处理，并且可以使用不同的方法进行获取处理。 TMCC信息获取方法节省存储空间，并通过使用粗频偏移来识别具有TMCC信息的信元并从识别的箱中获取TMCC和符号数信息来提供增强的性能。
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6.发明授权Robust FFT trigger point tracking for echo channels in OFDM based communication systems 有权基于OFDM的通信系统中的回波信道的鲁棒FFT触发点跟踪公开(公告)号：US08073064B2
公开(公告)日：2011-12-06
申请号：US12105300
申请日：2008-04-18
CPC分类号： H04L27/2662 , H04L27/2676 , H04L27/2695
摘要： Identifying a trigger point of at least one OFDM decoder includes correlating a first time-domain sample of the at least one OFDM symbol with a second time-domain sample of the at least one OFDM symbol, processing the first time-domain sample and the second time-domain sample in the first moving average filter to determine a channel impulse response, comparing at least one correlation value of a first biggest path in the channel impulse response and a second biggest path in the channel impulse response, and determining a channel length of the channel impulse response based on a time duration of the channel impulse response. The OFDM decoder includes a first moving average filter and a second moving average filter.
摘要翻译： 识别至少一个OFDM解码器的触发点包括将至少一个OFDM符号的第一时域样本与至少一个OFDM符号的第二时域样本进行相关，处理第一时域样本和第二时域采样 在第一移动平均滤波器中的时域采样以确定信道脉冲响应，比较信道脉冲响应中的第一最大路径的至少一个相关值和信道脉冲响应中的第二最大路径，并且确定信道脉冲响应的信道长度 基于信道脉冲响应的持续时间的信道脉冲响应。 OFDM解码器包括第一移动平均滤波器和第二移动平均滤波器。
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公开(公告)号：US20090268850A1
公开(公告)日：2009-10-29
申请号：US12107998
申请日：2008-04-23
IPC分类号： H04L27/22
CPC分类号： H04L27/2675 , H04L27/2659 , H04L2027/0034 , H04L2027/0053 , H04L2027/0067
摘要： A method of estimating a coarse frequency offset in a receiver includes providing at least one candidate frequency offset in Orthogonal Frequency-Division Multiplexing (OFDM) symbols having transmission and multiplexing configuration control (TMCC) bins and auxiliary channel (AC) bins, modulating the TMCC bins and AC bins using differential binary phase shift keying (DBPSK) modulation, estimating a phase difference between a first symbol and a second symbol for the candidate frequency offset of the TMCC and AC bins to obtain a resulting phase difference, correcting the resulting phase difference based on a difference between the candidate frequency offset and a Fast Fourier Transform (FFT) center bin to obtain a corrected phase difference, mapping the corrected phase difference to numeric numbers, and adding the numeric numbers for the candidate frequency offset to obtain a summation result. The numeric numbers correspond to at least one of +1 or −1.
摘要翻译： 一种估计接收机中的粗频偏移的方法，包括在具有传输和复用配置控制（TMCC）机箱和辅助信道（AC）机箱的正交频分复用（OFDM）符号中提供至少一个候选频偏，调制TMCC 使用差分二进制相移键控（DBPSK）调制，估计TMCC和AC信号的候选频率偏移的第一符号和第二符号之间的相位差以获得所得到的相位差，校正所得到的相位差 基于候选频率偏移和快速傅立叶变换（FFT）中心仓之间的差异来获得校正的相位差，将校正的相位差映射到数字，并且将候选频率偏移的数字加上以获得求和结果 。 数字对应于+1或-1中的至少一个。
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8.发明申请Robust FFT Trigger Point Tracking for Echo Channels in OFDM Based Communication Systems 有权基于OFDM的通信系统中回波信道的鲁棒FFT触发点跟踪公开(公告)号：US20090262842A1
公开(公告)日：2009-10-22
申请号：US12105300
申请日：2008-04-18
IPC分类号： H04L27/28
CPC分类号： H04L27/2662 , H04L27/2676 , H04L27/2695
摘要： Identifying a trigger point of at least one OFDM decoder includes correlating a first time-domain sample of the at least one OFDM symbol with a second time-domain sample of the at least one OFDM symbol, processing the first time-domain sample and the second time-domain sample in the first moving average filter to determine a channel impulse response, comparing at least one correlation value of a first biggest path in the channel impulse response and a second biggest path in the channel impulse response, and determining a channel length of the channel impulse response based on a time duration of the channel impulse response. The OFDM decoder includes a first moving average filter and a second moving average filter.
摘要翻译： 识别至少一个OFDM解码器的触发点包括将至少一个OFDM符号的第一时域样本与至少一个OFDM符号的第二时域样本进行相关，处理第一时域样本和第二时域采样 在第一移动平均滤波器中的时域采样以确定信道脉冲响应，将信道脉冲响应中的第一最大路径的至少一个相关值与信道脉冲响应中的第二最大路径进行比较，以及确定信道脉冲响应的信道长度 基于信道脉冲响应的持续时间的信道脉冲响应。 OFDM解码器包括第一移动平均滤波器和第二移动平均滤波器。
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公开(公告)号：US08064553B2
公开(公告)日：2011-11-22
申请号：US12107998
申请日：2008-04-23
IPC分类号： H04L27/06
CPC分类号： H04L27/2675 , H04L27/2659 , H04L2027/0034 , H04L2027/0053 , H04L2027/0067
摘要： A method of estimating a coarse frequency offset in a receiver includes providing at least one candidate frequency offset in Orthogonal Frequency-Division Multiplexing (OFDM) symbols having transmission and multiplexing configuration control (TMCC) bins and auxiliary channel (AC) bins, modulating the TMCC bins and AC bins using differential binary phase shift keying (DBPSK) modulation, estimating a phase difference between a first symbol and a second symbol for the candidate frequency offset of the TMCC and AC bins to obtain a resulting phase difference, correcting the resulting phase difference based on a difference between the candidate frequency offset and a Fast Fourier Transform (FFT) center bin to obtain a corrected phase difference, mapping the corrected phase difference to numeric numbers, and adding the numeric numbers for the candidate frequency offset to obtain a summation result. The numeric numbers correspond to at least one of +1 or −1.
摘要翻译： 一种估计接收机中的粗频偏移的方法，包括在具有传输和复用配置控制（TMCC）机箱和辅助信道（AC）机箱的正交频分复用（OFDM）符号中提供至少一个候选频偏，调制TMCC 使用差分二进制相移键控（DBPSK）调制，估计TMCC和AC信号的候选频率偏移的第一符号和第二符号之间的相位差以获得所得到的相位差，校正所得到的相位差 基于候选频率偏移和快速傅立叶变换（FFT）中心仓之间的差异来获得校正的相位差，将校正的相位差映射到数字，并且将候选频率偏移的数字加上以获得求和结果 。 数字对应于+1或-1中的至少一个。
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10.发明申请Look-Up Table Based Approach for Layer Combining in ISDB-T and ISDB-TSB Receivers 有权在ISDB-T和ISDB-TSB接收机中进行层叠组合的基于查找表的方法公开(公告)号：US20090268735A1
公开(公告)日：2009-10-29
申请号：US12107963
申请日：2008-04-23
IPC分类号： H04L12/28
CPC分类号： H04L1/0016 , H04L27/2647
摘要： A method of layer combining based on generating a look-up table in an Integrated Services Digital Broadcasting (ISDB) receiver includes obtaining a transmission parameter configuration, generating the look-up table based on the transmission parameter configuration, assembling a null transport stream packets and a valid transport stream packets from a plurality of layers of a multiplexing frame, and generating a completed transport packet stream using the look-up table. The receiver may generate the look-up table by at least one of generating the look-up table in real time or selecting from a look-up table set based on the transmission parameter configuration. The transmission parameter configuration may include at least one of a transmission mode, a guard interval, a modulation, and a coding rate. The look-up table may define an order of the null transport stream packets and the valid transport stream packets from the plurality of layers in the multiplexing frame.
摘要翻译： 基于在综合业务数字广播（ISDB）接收机中生成查询表的层组合方法包括获得传输参数配置，基于传输参数配置生成查找表，组合空传输流分组和 来自复用帧的多个层的有效传输流分组，以及使用查找表生成完成的传输分组流。 接收机可以通过实时生成查找表中的至少一个或者从基于传输参数配置的查找表集合中选择来生成查找表。 传输参数配置可以包括传输模式，保护间隔，调制和编码速率中的至少一个。 查找表可以在复用帧中定义来自多个层的空传输流分组和有效传输流分组的顺序。
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