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131. 发明申请

US20070127358A1 Phase correction in a test receiver 审中-公开
标题翻译：测试接收机中的相位校正
公开(公告)号：US20070127358A1
公开(公告)日：2007-06-07
申请号：US11417400
申请日：2006-05-03
申请人： Thomas Sun , Durk van Veen , Fuyun Ling , Murali Chari , Raghuraman Krishnamoorthi
发明人： Thomas Sun , Durk van Veen , Fuyun Ling , Murali Chari , Raghuraman Krishnamoorthi
IPC分类号： H04J11/00 , H04J3/06
CPC分类号： H04L27/2676 , H04B17/101 , H04B17/15 , H04L1/206 , H04L25/0232 , H04L25/0236 , H04L27/2657
摘要： The claimed subject matter relates to analyzing performance of a transmitter. This can be accomplished, for instance, through partitioning a super frame into a plurality of segments, and thereafter estimating and correcting phase with respect to at least one of the plurality of segments. Thereafter, additive noise can be determined with respect to the at least one segment. For instance, the super frame can include multiple OFDM symbols, and the transmitter can be a FLO transmitter.
摘要翻译：所要求保护的主题涉及分析发射机的性能。这可以例如通过将超帧划分成多个段，然后相对于多个段中的至少一个来估计和校正相位来实现。此后，可以相对于至少一个段确定附加噪声。例如，超帧可以包括多个OFDM符号，并且发射机可以是FLO发射机。

132. 发明申请

US20050157822A1 Data detection for a hierarchical coded data transmission 有权
标题翻译：分层编码数据传输的数据检测
公开(公告)号：US20050157822A1
公开(公告)日：2005-07-21
申请号：US10821585
申请日：2004-04-09
申请人： Aamod Khandekar , Raghuraman Krishnamoorthi
发明人： Aamod Khandekar , Raghuraman Krishnamoorthi
IPC分类号： H04L25/03 , H04L25/06 , H04L27/34 , H04L27/38 , H04L27/06
CPC分类号： H04L27/3488 , H04L25/03305 , H04L25/03318
摘要： Techniques for performing data detection for a hierarchical coded data transmission are described. In one data detection scheme, log-likelihood ratios (LLRs) for code bits of a first data stream are initially derived based on received symbols for the data transmission. The LLRs for the first data stream are decoded to obtain decoded data, which is re-encoded and remodulated to obtain remodulated symbols. Interference due to the first data stream is estimated based on the remodulated symbols. LLRs for code bits of a second data stream are derived based on the LLRs for the code bits of the first data stream and the estimated interference. The LLRs for the first data stream may be derived from the received symbols in real-time without buffering the received symbols. The LLRs for the second data stream may be derived after the first data stream has been decoded.
摘要翻译：描述用于执行分层编码数据传输的数据检测的技术。在一个数据检测方案中，基于用于数据传输的接收符号，最初导出用于第一数据流的码位的对数似然比（LLR）。对第一数据流的LLR进行解码以获得被重新编码并重新调制以获得重新调制符号的解码数据。基于重新编码的符号来估计由于第一数据流引起的干扰。基于用于第一数据流的码位的LLR和所估计的干扰，导出用于第二数据流的码位的LLR。可以实时地从接收到的符号导出用于第一数据流的LLR，而不缓冲接收到的符号。可以在第一数据流被解码之后导出用于第二数据流的LLR。

133. 发明授权

US08982832B2 Wireless communication of turbo coded data with time diversity 有权
标题翻译：具有时间分集的turbo编码数据的无线通信
公开(公告)号：US08982832B2
公开(公告)日：2015-03-17
申请号：US12165663
申请日：2008-07-01
申请人： Fuyun Ling , Thomas Sun , Tao Tian , Raghuraman Krishnamoorthi , Jing Jiang
发明人： Fuyun Ling , Thomas Sun , Tao Tian , Raghuraman Krishnamoorthi , Jing Jiang
IPC分类号： H04W4/00 , H04J3/00 , H03M13/29 , H04L1/00
CPC分类号： H03M13/2957 , H04L1/0066 , H04L1/0071
摘要： A turbo-coded data block is processed for transmission on a wireless communication link by scheduling a plurality of portions of the block for transmission during respectively corresponding transmit intervals that are temporally separated from one another. The block portions are transmitted during the respectively corresponding transmit intervals according to the scheduling.
摘要翻译：通过在时间上彼此分离的分别对应的发送间隔期间调度用于发送的块的多个部分来处理turbo编码的数据块以在无线通信链路上进行发送。根据调度在分别对应的发送间隔期间发送块部分。

134. 发明授权

US08582696B2 Method and apparatus for data quantization and packing with variable bit width and period 失效
标题翻译：用于可变位宽度和周期的数据量化和打包的方法和装置
公开(公告)号：US08582696B2
公开(公告)日：2013-11-12
申请号：US13407876
申请日：2012-02-29
申请人： Seokyong Oh , Thomas Sun , Raghuraman Krishnamoorthi
发明人： Seokyong Oh , Thomas Sun , Raghuraman Krishnamoorthi
IPC分类号： H04L27/06
CPC分类号： H04L25/03184 , H04L25/067
摘要： The various embodiments provide circuitry and methods for packing Log Likelihood Ratio (“LLR”) values into a buffer memory in a compressed format which reduces the amount of buffer memory required. Various embodiments use a type of quantization which reduces the bit width of the LLR values that are stored, with the particular level of quantization depending upon the code rate of the data. The degree, pattern, and periodicity of bit width compression employed may depend upon the code rate of the received transmission. Bit width patterns use for LLR value quantization may be generated by a shift register circuit which provides an efficient mechanism for controlling an LLR packer circuit based upon the code rate of the received signal.
摘要翻译：各种实施例提供用于将对数似然比（“LLR”）值以压缩格式打包到缓冲存储器中的电路和方法，其减少了所需的缓冲存储器的量。各种实施例使用一种类型的量化，其根据数据的码率降低具有特定的量化水平的存储的LLR值的位宽度。所采用的位宽度压缩的程度，模式和周期可能取决于接收到的传输的码率。用于LLR值量化的位宽度图案可以由移位寄存器电路产生，该移位寄存器电路基于接收信号的码率提供用于控制LLR封隔器电路的有效机构。

135. 发明授权

US08363758B2 Method and system for automatic gain control during signal acquisition 有权
标题翻译：信号采集过程中自动增益控制的方法和系统
公开(公告)号：US08363758B2
公开(公告)日：2013-01-29
申请号：US12720534
申请日：2010-03-09
申请人： Vinay Murthy , Linbo Li , Raghuraman Krishnamoorthi
发明人： Vinay Murthy , Linbo Li , Raghuraman Krishnamoorthi
IPC分类号： H04L27/08
CPC分类号： H03G3/3052
摘要： The disclosure is directed to a mobile communication device that includes automatic gain control (AGC) circuitry and operates in either a tracking mode or an acquisition mode. A received signal is sampled n times to calculate an energy estimate that is used to set the gain control values within the AGC circuitry. The value of n varies depending on whether the handset is operating in the acquisition mode or the tracking mode. Acquisition mode is typically considered to be the mode prior to coarse timing acquisition, also referred to as frame acquisition.
摘要翻译：本公开涉及包括自动增益控制（AGC）电路并且以跟踪模式或采集模式操作的移动通信设备。接收到的信号被采样n次以计算用于设置AGC电路内的增益控制值的能量估计。 n的值根据手机在采集模式或跟踪模式下的运行而变化。采集模式通常被认为是粗略定时采集之前的模式，也称为帧采集。

136. 发明申请

US20110255622A1 METHODS AND APPARATUS FOR REDUCTION OF A PEAK TO AVERAGE RATIO FOR AN OFDM TRANSMIT SIGNAL 审中-公开
标题翻译：用于减少OFDM传输信号的平均比的峰值的方法和装置
公开(公告)号：US20110255622A1
公开(公告)日：2011-10-20
申请号：US13168849
申请日：2011-06-24
申请人： Durk L. van Veen , Fuyun Ling , Raghuraman Krishnamoorthi
发明人： Durk L. van Veen , Fuyun Ling , Raghuraman Krishnamoorthi
IPC分类号： H04J11/00
CPC分类号： H04L27/2614 , H04L27/2615
摘要： Methods and apparatus for reduction of a peak to average ratio for an OFDM transmit signal. In an aspect, a method is provided for reducing a peak to average ratio of a transmit waveform. The method includes obtaining a primary scrambler sequence, generating a secondary scrambler sequence having a length characteristic based on data to be scrambled, and combining the primary and secondary scrambler sequences to produce a PAR reduction sequence. In another aspect, an apparatus is provided for reducing a peak to average ratio of a transmit waveform. The apparatus includes a secondary generator configured to generate a secondary scrambler sequence having a length characteristic based on data to be scrambled, and combining logic configured to combine a primary scrambler sequence and the secondary scrambler sequences to produce a PAR reduction sequence.
摘要翻译：降低OFDM发射信号的峰均比的方法和装置。在一方面，提供了一种降低发射波形的峰均比的方法。该方法包括：获得主加扰器序列，产生具有基于要加扰的数据的长度特性的次扰频序列，以及组合所述主加扰序列和次加扰序列以产生PAR减少序列。在另一方面，提供一种用于减小发射波形的峰均比的装置。该装置包括辅助发生器，其被配置为产生具有基于要加扰的数据的长度特性的二次扰频器序列，以及被配置为组合主加扰器序列和次加扰器序列以产生PAR减少序列的组合逻辑。

137. 发明申请

US20110085499A1 SYSTEM AND METHOD FOR THE SIMULTANEOUS TRANSMISSION AND RECEPTION OF FLO AND FIO-EV DATA 审中-公开
标题翻译：同时传输和接收FLO和FIO-EV数据的系统和方法
公开(公告)号：US20110085499A1
公开(公告)日：2011-04-14
申请号：US12876962
申请日：2010-09-07
申请人： KRISHNA K. MUKKAVILLI , Ralph A. Gholmieh , Durk L. van Veen , Raghuraman Krishnamoorthi , Neville J. Meijers , Gordon K. Walker
发明人： KRISHNA K. MUKKAVILLI , Ralph A. Gholmieh , Durk L. van Veen , Raghuraman Krishnamoorthi , Neville J. Meijers , Gordon K. Walker
IPC分类号： H04W40/00
CPC分类号： H04H20/30 , H04H60/91 , H04N21/235 , H04N21/2362 , H04N21/2389 , H04N21/435 , H04N21/4382 , H04N21/4383 , H04N21/4385 , H04W72/005 , H04W72/1273
摘要： A system for transmitting a data stream, includes a transmitter for broadcasting a radio frequency communication signal comprising at least one superframe having at least a first data stream encoded therein, and overhead information carried in the superframe, the overhead information comprising a control channel, the control channel having control channel information for separating the at least one first data stream from any other data streams encoded in the at least one superframe. A system for receiving data includes a receiver configured to receive a radio frequency communication signal comprising at least one superframe having at least a first data stream encoded therein; and overhead information carried in the superframe, the overhead information comprising a control channel, the control channel having control channel information for separating the at least one first data stream from any other data streams encoded in the at least one superframe.
摘要翻译：一种用于发送数据流的系统，包括：发射机，用于广播包括至少一个其中编码的至少一个第一数据流的超帧的射频通信信号和在该超帧中承载的开销信息，所述开销信息包括控制信道，控制信道具有用于将至少一个第一数据流与在至少一个超帧中编码的任何其他数据流分离的控制信道信息。一种用于接收数据的系统包括：接收机，被配置为接收射频通信信号，所述射频通信信号包括至少一个其中编码有至少第一数据流的超帧; 以及在所述超帧中承载的开销信息，所述开销信息包括控制信道，所述控制信道具有用于将所述至少一个第一数据流与在所述至少一个超帧中编码的任何其它数据流分离的控制信道信息。

138. 发明授权

US07889820B2 Phase compensation for analog gain switching in OFDM modulated physical channel 有权
标题翻译： OFDM调制物理信道中模拟增益切换的相位补偿
公开(公告)号：US07889820B2
公开(公告)日：2011-02-15
申请号：US11393128
申请日：2006-03-29
申请人： Vinay Murthy , Linbo Li , Raghuraman Krishnamoorthi
发明人： Vinay Murthy , Linbo Li , Raghuraman Krishnamoorthi
IPC分类号： H04L27/08 , H04B17/02
CPC分类号： H03G1/0088 , H03G3/3052 , H04L27/2657
摘要： A control of an amplifier in an automatic gain control (AGC) loop, e.g. in the RF front end circuitry of an OFDM receiver, provides phase adjustment control data to an associated automatic frequency control (AFC), to compensate for a phase jump that would otherwise be caused by switching of the AGC gain between discrete gain states. In the disclosed example, for each gain state, comparators detect a signal energy estimate crossing either a high threshold or a low threshold. Upon threshold crossing, multiplexers select compensation data corresponding to the necessary transition from the prior state to the new state determined by the comparators, based on identification of the prior state and on the particular threshold that has been crossed (high or low). The phase compensation data supplied to the AFC, for one interval corresponding to the timing of the gain switching, adjusts phase rotation implemented in the AFC.
摘要翻译：自动增益控制（AGC）回路中放大器的控制，例如。在OFDM接收机的RF前端电路中，向相关联的自动频率控制（AFC）提供相位调整控制数据，以补偿否则将由离散增益状态之间的AGC增益切换引起的相位跳变。在所公开的示例中，对于每个增益状态，比较器检测穿过高阈值或低阈值的信号能量估计。在阈值交叉时，多路复用器基于先前状态的识别和已经被交叉（高或低）的特定阈值来选择对应于从比较器确定的从先前状态到新状态的必要转换的补偿数据。提供给AFC的相位补偿数据在对应于增益切换的定时的一个间隔内调整在AFC中实现的相位旋转。

139. 发明授权

US07720162B2 Partial FFT processing and demodulation for a system with multiple subcarriers 有权
标题翻译：具有多个子载波的系统的部分FFT处理和解调
公开(公告)号：US07720162B2
公开(公告)日：2010-05-18
申请号：US11372397
申请日：2006-03-08
申请人： Raghuraman Krishnamoorthi
发明人： Raghuraman Krishnamoorthi
IPC分类号： H04K1/10
CPC分类号： H04L27/265 , G06F17/142 , H04L5/023 , H04L25/022 , H04L27/2633
摘要： Techniques for efficiently performing partial FFT for subcarriers of interest are described. The N total subcarriers may be arranged into M sets. Each set may contain K subcarriers uniformly distributed across the N total subcarriers, where M·K=N. For the partial FFT, pre-processing is initially performed on time-domain samples to obtain intermediate samples. The pre-processing may include performing M-point FFTs on the time-domain samples and multiplying the FFT outputs with unit complex values. For each set of subcarriers of interest, a K-point FFT is performed on a set of intermediate samples to obtain a set of frequency-domain symbols for that set of subcarriers. Since K is typically much smaller than N, substantial savings in computation and power may be realized when only one or few sets of subcarriers are of interest.
摘要翻译：描述了用于对感兴趣的子载波进行部分FFT的有效执行的技术。 N个总副载波可以被布置成M组。每个集合可以包含均匀分布在N个总子载波上的K个子载波，其中M·K = N。对于部分FFT，首先对时域采样进行预处理，以获得中间样本。预处理可以包括对时域采样执行M点FFT，并将FFT输出与单位复数值相乘。对于感兴趣的每组子载波，对一组中间采样执行K点FFT以获得该组子载波的频域符号集合。由于K通常比N小得多，所以当只有一组或几组副载波感兴趣时，可以实现计算和功率的显着节省。

140. 发明申请

US20080220723A1 COHERENT INITIAL ACQUISITION 有权
标题翻译：相关的初步收购
公开(公告)号：US20080220723A1
公开(公告)日：2008-09-11
申请号：US11860505
申请日：2007-09-24
申请人： Raghuraman Krishnamoorthi , Tao Tian , Fuyun Ling , Yuheng Huang
发明人： Raghuraman Krishnamoorthi , Tao Tian , Fuyun Ling , Yuheng Huang
IPC分类号： H04B7/00
CPC分类号： H04L27/2675 , H04L5/0007 , H04L5/0048 , H04L27/261 , H04L27/2655
摘要： An acquisition module includes a coherent correlator configured to receive a transmission having a pilot signal and correlate the received transmission with a local copy of the pilot signal to produce a first output, a delayed correlator configured to delay the first output and correlate the first output with the delayed first output to produce a second output, and a detector configured to detect the pilot signal in the transmission based on the second output.
摘要翻译：获取模块包括相干相关器，其被配置为接收具有导频信号的传输并将接收到的传输与导频信号的本地副本相关联以产生第一输出，延迟相关器被配置为延迟第一输出并将第一输出与延迟的第一输出以产生第二输出;以及检测器，被配置为基于所述第二输出来检测所述传输中的导频信号。

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