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公开(公告)号：US20050186921A1
公开(公告)日：2005-08-25
申请号：US10810433
申请日：2004-03-26
申请人： Min Hoo , Rajendra Moorti
发明人： Min Hoo , Rajendra Moorti
CPC分类号： H04B7/0814 , H04B7/0608
摘要： Certain embodiments of the invention may be found in a method and system for antenna selection diversity with prediction. An antenna diversity system may use information that it has stored on the antenna selection process in previous frames to predict the starting receiving antenna and the starting transmission antenna for the next frame. The prediction may be based on which antennas were selected in previous frames or may be based metrics associated with performance of the antennas. Prediction may be based on a majority polling scheme of previously selected antennas in a determined number of previous frames. Prediction may also be based on a weighted sum of at least one selection metric for all antennas in a determined number of previous frames. Antenna prediction provides a significant performance improvement by reducing the processing and operational overhead in cases where a transmit or a receive antenna dominates.
摘要翻译： 可以在用于具有预测的天线选择分集的方法和系统中找到本发明的某些实施例。 天线分集系统可以使用其在先前帧中的天线选择过程上存储的信息来预测起始接收天线和下一帧的起始发射天线。 预测可以基于在先前帧中选择哪些天线或者可以是与天线的性能相关联的基于度量的度量。 预测可以基于在确定数量的先前帧中的先前选择的天线的多数轮询方案。 预测还可以基于确定数量的先前帧中的所有天线的至少一个选择度量的加权和。 天线预测通过在发射或接收天线占主导地位的情况下减少处理和操作开销来提供显着的性能改进。
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2.发明申请公开(公告)号：US20050215214A1
公开(公告)日：2005-09-29
申请号：US10810462
申请日：2004-03-26
申请人： Rajendra Moorti , Min Hoo
发明人： Rajendra Moorti , Min Hoo
CPC分类号： H01Q21/29 , H04B1/1027
摘要： A method and system for antenna selection diversity with dynamic gain control. A receiver selects a starting antenna and dwells on it until an incoming signal is detected. An AGC is applied on the received signal and an estimate of the received power is determined for the starting antenna. The receiver may dwell on other antennas if the signal in the first antenna is not strong enough for signal processing. The gain of an antenna may be set by the gain and power levels of the previously dwelled-on antennas and/or by a power coupling factor that exists between the antennas in an antenna switch. The receiver switches through the remaining antennas as long as necessary to select at least one of the antennas for signal processing. Dynamically adjusting the gain of antennas in a diversity system provides a more accurate and efficient antenna selection scheme.
摘要翻译： 一种采用动态增益控制的天线选择分集方法和系统。 接收机选择起始天线并驻留在其上，直到检测到输入信号。 对接收的信号应用AGC，并且为起始天线确定接收功率的估计。 如果第一天线中的信号不足以用于信号处理，则接收机可以驻留在其他天线上。 天线的增益可以由先前驻留的天线的增益和功率电平和/或由天线开关中的天线之间存在的功率耦合因子来设定。 只要需要选择至少一个天线进行信号处理，接收机就切换剩余的天线。 在分集系统中动态地调整天线的增益提供了更精确和更有效的天线选择方案。
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公开(公告)号：US20050186910A1
公开(公告)日：2005-08-25
申请号：US10810186
申请日：2004-03-26
申请人： Rajendra Moorti , Min Hoo , Jason Trachewsky
发明人： Rajendra Moorti , Min Hoo , Jason Trachewsky
CPC分类号： H04B17/0042 , H01Q1/1257 , H04B1/1027 , H04B7/0805 , H04B17/309
摘要： Methods and systems for choosing at least one signal path are disclosed. Aspects of the method may include determining a signal quality metric for each of a plurality of signal paths, modifying the signal quality metric for each of the plurality of signal paths, and selecting at least one signal path based on at least one modified signal quality metric. At least one of the signal paths may be cycled through and the signal quality metric may be biased and/or increased and/or decreased for each of the plurality of signal paths by a fixed amount and/or by a predetermined amount. The signal quality metric may also be dynamically changed for each of the plurality of signal paths.
摘要翻译： 公开了用于选择至少一个信号路径的方法和系统。 方法的方面可以包括确定多个信号路径中的每一个的信号质量度量，修改多个信号路径中的每一个的信号质量度量，以及基于至少一个修改的信号质量度量来选择至少一个信号路径 。 信号路径中的至少一个可以循环通过，并且信号质量度量可以针对多个信号路径中的每一个以固定量和/或预定量被偏置和/或增加和/或减小。 信号质量度量也可以针对多个信号路径中的每一个动态地改变。
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公开(公告)号：US20070019748A1
公开(公告)日：2007-01-25
申请号：US11364637
申请日：2006-02-28
申请人： Min Hoo , Rajendra Moorti
发明人： Min Hoo , Rajendra Moorti
IPC分类号： H04L27/28
CPC分类号： H04L27/2657 , H04L1/0618 , H04L27/2679 , H04L27/2695
摘要： Angle estimation for modulated signal. A novel compensation technique is presented by which angle estimation may be performed for a modulated signal. More specifically, the angle between a constellation corresponding to a received signal and a constellation corresponding to a received signal may be very efficiently estimated using any one of the possible embodiments corresponding to various aspects of the invention. After this angle has been estimated, the received signal or the expected constellation may be rotated (or de-rotated) to compensate for this angular difference. In doing so, better estimates of the information bits that are demodulated and decoded from the received signal may be made. This approach may be implemented and adapted to any of a wide variety of communication systems including, but not limited to, single-input-multiple-output (SISO), single-input-multiple-output (SIMO), multiple-input-single-output (MISO), multiple-input-multiple-output (MIMO), and even space-time block code (STBC) communication systems or other communication systems.
摘要翻译： 调制信号的角度估计。 提出了一种新颖的补偿技术，可以对调制信号进行角度估计。 更具体地，可以使用对应于本发明的各个方面的任何一个可能的实施例来非常有效地估计对应于接收信号的星座与对应于接收信号的星座之间的角度。 在估计该角度之后，接收信号或预期星座可以被旋转（或去旋转）以补偿该角度差。 在这样做时，可以对从接收信号进行解调和解码的信息比特的更好估计。 这种方法可以被实现和适用于各种通信系统中的任何一种，包括但不限于单输入多输出（SISO），单输入多输出（SIMO），多输入单 输出（MISO），多输入多输出（MIMO），甚至空时块码（STBC）通信系统或其他通信系统。
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公开(公告)号：US20070183541A1
公开(公告)日：2007-08-09
申请号：US11695795
申请日：2007-04-03
申请人： Rajendra Moorti , Min Hoo , Jason Trachewsky
发明人： Rajendra Moorti , Min Hoo , Jason Trachewsky
CPC分类号： H04L25/067 , H04L27/0012
摘要： A radio frequency receiver for discriminating a modulation type to decode a signal field of an encoded signal in a wireless communication system. The radio frequency (RF) receiver receives an encoded signal having a preamble training sequence associated with a frame, the preamble training sequence including the signal field. The radio frequency receive generates at least a first log-likelihood ratio (LLR) stream and a second LLR stream for each of a plurality of sub-symbols for a predetermined portion of the received encoded signal based upon an m-bit wide modulation reference, wherein m represents the bit width of the modulation reference. The first LLR stream and the second LLR stream each include a plurality of LLR values. The plurality of LLR values of the first LLR stream are summed to produce a first cumulative LLR, and the plurality of LLR values of the second LLR stream are summed to produce a second cumulative LLR. The first cumulative LLR is discriminated with the second cumulative LLR to produce a discriminated modulation type output. The receiver decodes the signal field based on the discriminated modulation type output.
摘要翻译： 一种射频接收机，用于鉴别在无线通信系统中对编码信号的信号场进行解码的调制类型。 射频（RF）接收机接收具有与帧相关联的前同步码训练序列的编码信号，前导码训练序列包括信号字段。 基于m位宽调制参考，无线电频率接收对于接收的编码信号的预定部分的多个子符号中的每一个产生至少第一对数似然比（LLR）流和第二LLR流， 其中m表示调制参考的位宽度。 第一LLR流和第二LLR流各自包括多个LLR值。 将第一LLR流的多个LLR值相加以产生第一累积LLR，并且将第二LLR流的多个LLR值相加以产生第二累积LLR。 第一累积LLR用第二累积LLR进行鉴别，以产生鉴别调制类型的输出。 接收机根据鉴别出的调制类型输出对信号场进行解码。
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6.发明申请公开(公告)号：US20070064735A1
公开(公告)日：2007-03-22
申请号：US11504905
申请日：2006-08-16
申请人： Min Hoo , Rajendra Moorti , Jason Trachewsky
发明人： Min Hoo , Rajendra Moorti , Jason Trachewsky
IPC分类号： H04J3/22
CPC分类号： H04W99/00 , H04L1/0005 , H04L1/0007 , H04L1/0019 , H04L1/0039 , H04L1/06 , H04W84/12
摘要： A transceiver device for processing a frame in a wireless local area network, where the frame is one of several frame formats, which include a high throughput frame format. The transceiver device receives a frame having a training sequence, a signal field and a data payload, and processes the training sequence to detect which signal field length of a plurality of signal field lengths was used in the received frame. With the signal field length, the device processes the signal field based upon the detected signal field length to retrieve the data payload processing information.
摘要翻译： 一种用于处理无线局域网中的帧的收发器设备，其中帧是包括高吞吐量帧格式的几种帧格式之一。 收发器装置接收具有训练序列，信号字段和数据有效载荷的帧，并且处理训练序列以检测在接收帧中使用多个信号字段长度的信号字段长度。 利用信号字段长度，设备基于检测到的信号字段长度处理信号字段以检索数据有效载荷处理信息。
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7.发明申请公开(公告)号：US20050185707A1
公开(公告)日：2005-08-25
申请号：US10810408
申请日：2004-03-26
申请人： Min Hoo , Rajendra Moorti
发明人： Min Hoo , Rajendra Moorti
CPC分类号： H04B7/0874 , H04B7/0608 , H04B7/0691 , H04B7/082 , H04L1/20
摘要： Methods and systems for selecting at least one signal path are disclosed. Aspects of the method may comprise determining a signal quality metric for each of a plurality of signal paths and assigning a threshold signal quality metric for the plurality of signal paths. A signal path may be discarded from the plurality of signal paths, if the determined signal quality metric for the signal path does not satisfy the threshold signal quality metric. A different threshold signal quality metric and/or a fixed threshold signal quality metric may be assigned for each of the plurality of signal paths. The threshold signal quality metric may be dynamically changed for each of the plurality of signal paths.
摘要翻译： 公开了用于选择至少一个信号路径的方法和系统。 该方法的方面可以包括确定多个信号路径中的每一个的信号质量度量并为多个信号路径分配阈值信号质量度量。 如果所确定的信号路径的信号质量度量不满足阈值信号质量度量，则可以从多个信号路径丢弃信号路径。 可以为多个信号路径中的每一个分配不同的阈值信号质量度量和/或固定阈值信号质量度量。 阈值信号质量度量可以针对多个信号路径中的每一个动态地改变。
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公开(公告)号：US20070025392A1
公开(公告)日：2007-02-01
申请号：US11406667
申请日：2006-04-19
CPC分类号： H04L27/0012 , H04B1/005 , H04B1/406 , H04L7/041
摘要： Discriminating a modulation type based upon a predetermined portion of symbols for a received encoded signal. While receiving the encoded signal, at least a first and a second cumulative soft metrics are generated using the plurality of symbols over a predetermined portion of the received encoded signal. The first cumulative soft metric is compared with the second cumulative soft metric to generate or provide a discriminated modulation type. With the discriminated modulation type, the signal field is decoded, allowing for decoding of the accompanying data payload with the encoded signal.
摘要翻译： 基于接收到的编码信号的符号的预定部分来区分调制类型。 在接收编码信号的同时，在所接收的编码信号的预定部分上使用多个符号生成至少第一和第二累积软度量。 将第一累积软度量与第二累积软度量相比较以产生或提供鉴别调制类型。 利用鉴别调制类型，信号字段被解码，允许用编码信号解码伴随的数据有效载荷。
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公开(公告)号：US20050265469A1
公开(公告)日：2005-12-01
申请号：US11137259
申请日：2005-05-25
申请人： Carlos Aldana , Amit Bagchi , Min Hoo
发明人： Carlos Aldana , Amit Bagchi , Min Hoo
CPC分类号： H04B7/0613 , H04L1/0059 , H04L1/0071 , H04L27/2608
摘要： An arrangement of interleavers allocates bits from an input symbol across sub-symbols transmitted via sub-carriers of multiple orthogonal frequency division multiplex (OFDM) carriers. The input bits are allocated in a fashion to provide separation across subcarriers, and rotation of sub-symbols across the OFDM carriers provides additional robustness in the present of signal path impairments.
摘要翻译： 交织器的布置分配来自多个正交频分复用（OFDM）载波的子载波发送的子符号之间的输入符号的比特。 以一种方式分配输入比特以提供跨子载波的分离，并且跨OFDM载波的子符号的旋转在信号路径损伤的当前提供额外的鲁棒性。
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