公开(公告)号：US07764741B2

公开(公告)日：2010-07-27

申请号：US11695795

申请日：2007-04-03

Applicant: Rajendra Tushar Moorti ,  Min Chuin Hoo ,  Jason A. Trachewsky

Inventor： Rajendra Tushar Moorti ,  Min Chuin Hoo ,  Jason A. Trachewsky

IPC: H04L27/06

CPC classification number: H04L25/067 ,  H04L27/0012

Abstract: 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.

Abstract translation: 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。 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。

公开(公告)号：US07746886B2

公开(公告)日：2010-06-29

申请号：US10979368

申请日：2004-11-01

Applicant: Christopher J. Hansen ,  Jason A. Trachewsky ,  Nambirajan Seshadri ,  Kelly Brian Cameron ,  Hau Thien Tran ,  Ba-Zhong Shen

Inventor： Christopher J. Hansen ,  Jason A. Trachewsky ,  Nambirajan Seshadri ,  Kelly Brian Cameron ,  Hau Thien Tran ,  Ba-Zhong Shen

IPC: H04W76/00

CPC classification number: H04B7/0613 ,  H04B7/0413

Abstract: A method for asymmetrical MIMO wireless communication begins by determining a number of transmission antennas for the asymmetrical MIMO wireless communication. The method continues by determining a number of reception antennas for the asymmetrical MIMO wireless communication. The method continues by, when the number of transmission antennas exceeds the number of reception antennas, using spatial time block coding for the asymmetrical MIMO wireless communication. The method continues by, when the number of transmission antennas does not exceed the number of reception antennas, using spatial multiplexing for the asymmetrical MIMO wireless communication.

Abstract translation: 一种用于非对称MIMO无线通信的方法是通过确定用于非对称MIMO无线通信的多个发送天线来开始的。 该方法通过确定用于非对称MIMO无线通信的接收天线的数量来继续。 当发送天线的数量超过接收天线的数量时，该方法继续使用用于非对称MIMO无线通信的空间时间块编码。 当发送天线的数量不超过接收天线的数量时，该方法继续使用用于非对称MIMO无线通信的空间复用。

公开(公告)号：US20100115375A1

公开(公告)日：2010-05-06

申请号：US12612640

申请日：2009-11-04

Applicant: Ba-Zhong Shen ,  Jason A. Trachewsky

Inventor： Ba-Zhong Shen ,  Jason A. Trachewsky

IPC: H03M13/29 ,  G06F11/10 ,  H03M13/05

CPC classification number: H03M13/1102 ,  H03M13/6356 ,  H03M13/6362 ,  H04L1/0068 ,  H04L1/0079 ,  H04L1/08 ,  H04L27/2601

Abstract: In a communication device that is operative to perform decoding, a log-likelihood ratio (LLR) circuitry operates to calculate LLRs corresponding to every bit location within a received bit sequence. This received bit sequence may include a header and a data portion (both of which may be included within a frame that also includes a preamble). The header is composed of information bits, a duplicate of those information bits (such as may be generated in accordance with repetition encoding), and redundancy bits. The header includes information corresponding to frame or data including frame length, a code type by which the data are encoded, a code rate by which the data are encoded, and a modulation by which symbols of the data are modulated. Once the header has been decoded, then the data corresponding thereto is decoded by a block decoder circuitry to make estimates of that data.

Abstract translation: 在可操作地执行解码的通信设备中，对数似然比（LLR）电路用于计算对应于接收的比特序列内的每个比特位置的LLR。 该接收的比特序列可以包括头部和数据部分（两者都可以包括在还包括前同步码的帧内）。 报头由信息位组成，这些信息位的副本（例如可以根据重复编码生成）和冗余位。 标题包括对应于帧或数据的信息，包括帧长度，数据被编码的代码类型，数据被编码的编码速率以及数据的符号被调制的调制。 一旦标题已被解码，则与其对应的数据由块解码器电路解码以对该数据进行估计。

公开(公告)号：US07586881B2

公开(公告)日：2009-09-08

申请号：US10973212

申请日：2004-10-26

Applicant: Christopher J. Hansen ,  Jason A. Trachewsky ,  R. Tushar Moorti ,  Matthew J. Fischer ,  Christopher Young

Inventor： Christopher J. Hansen ,  Jason A. Trachewsky ,  R. Tushar Moorti ,  Matthew J. Fischer ,  Christopher Young

IPC: H04Q7/00

CPC classification number: H04W72/044 ,  H04L1/0001 ,  H04L1/0002 ,  H04L1/0003 ,  H04L1/06 ,  H04L1/1867 ,  H04L25/0226 ,  H04L25/0228 ,  H04L27/2613 ,  H04W84/12

Abstract: A method for multiple input multiple output wireless communication begins by determining protocols of wireless communication devices within the proximal region. The method continues by determining whether the protocols of the wireless communication devices within a proximal region are of a like protocol. The method continues by determining the a number of transmit antennas. The method continues, when the protocols of the wireless communication devices within a proximal region are of the like protocol, formatting preamble of a frame of a wireless communication utilizing at least one of cyclic shifting of symbols, cyclic shifting of tones, sparse tone allocation, and sparse symbol allocation based on the number of transmit antennas.

Abstract translation: 用于多输入多输出无线通信的方法通过确定近端区域内的无线通信设备的协议来开始。 该方法通过确定近端区域内的无线通信设备的协议是否具有类似协议来继续。 该方法通过确定多个发射天线来继续。 该方法继续，当近端区域内的无线通信设备的协议类似协议时，使用符号的循环移位，音调的循环移位，稀疏音分配等的格式化无线通信的帧的前导码， 和基于发射天线数量的稀疏符号分配。

公开(公告)号：US07555053B2

公开(公告)日：2009-06-30

申请号：US10929313

申请日：2004-08-30

Applicant: Jason A. Trachewsky ,  R. Tushar Moorti ,  Christopher J. Hansen

Inventor： Jason A. Trachewsky ,  R. Tushar Moorti ,  Christopher J. Hansen

IPC: H04B7/02

CPC classification number: H04B7/0613

Abstract: A method for configuring a multiple input multiple output (MIMO) wireless communication begins by generating a plurality of preambles for a plurality of transmit antennas. Each of the plurality of preambles includes a carrier detection sequence at a legacy transmit rate, a first channel sounding at the legacy transmit rate, a signal field at the legacy transmit rate, and Z−1 channel soundings at a MIMO transmit rate, where L corresponds to a number of channel soundings. The method continues by simultaneously transmitting the plurality of preambles via the plurality of transmit antennas.

公开(公告)号：US07409196B2

公开(公告)日：2008-08-05

申请号：US11711948

申请日：2007-02-27

Applicant: Jason A. Trachewsky ,  David (Chuong) Lam

Inventor： Jason A. Trachewsky ,  David (Chuong) Lam

IPC: H01Q11/12

CPC classification number: H04W52/24 ,  H04B17/318 ,  H04W52/226

Abstract: An RFIC transmitter includes a digital transmit processing module, a digital to analog converter, a filter and gain module, an up-conversion module, a power amplifier, and a transmit signal strength module. The transmit signal strength module is coupled to generate a gain adjust signal based on a measure of transmit power of an outbound RF signal, wherein the transmit signal strength module provides the gain adjust signal to at least one of the digital transmitter processing module, the digital to analog converter, the filter and gain module, the up-conversion module, and the power amplifier.

Abstract translation: RFIC发射机包括数字发射处理模块，数模转换器，滤波器和增益模块，上变频模块，功率放大器和发射信号强度模块。 发射信号强度模块被耦合以基于出站RF信号的发射功率的测量产生增益调整信号，其中发射信号强度模块将增益调整信号提供给数字发射机处理模块，数字 到模拟转换器，滤波器和增益模块，上变频模块和功率放大器。

公开(公告)号：US07181187B2

公开(公告)日：2007-02-20

申请号：US10757931

申请日：2004-01-15

Applicant: Jason A. Trachewsky ,  Alan Corry

Inventor： Jason A. Trachewsky ,  Alan Corry

IPC: H04B1/26

CPC classification number: H04B1/0475 ,  H04L7/041 ,  H04L7/08 ,  H04L27/2647

Abstract: A radio frequency transmitter includes a digital baseband and coding module, an inverse fast Fourier transform (IFFT) module, a complex digital filter, a complex digital-to-analog converter and a radio frequency modulation module. The digital baseband and coding module is operably coupled to convert outbound data into outbound symbols in accordance with a baseband encoding protocol. The IFFT module is operably coupled to convert the outbound symbols into a complex time domain sample sequence. The complex digital filter is operably coupled to filter the complex time domain sequence such that signal strength of outbound RF signals in an exclusion RF band is at or below a specified signal strength with negligible attenuation on in-band signal strength.

Abstract translation: 射频发射机包括数字基带和编码模块，快速傅里叶逆变换（IFFT）模块，复数数字滤波器，复数数模转换器和射频调制模块。 数字基带和编码模块可操作地耦合以根据基带编码协议将出站数据转换成出站符号。 IFFT模块可操作地耦合以将出站符号转换为复杂时域采样序列。 复数字滤波器可操作地耦合以对复杂时域序列进行滤波，使得排除RF频带中的出站RF信号的信号强度处于或低于特定信号强度，并且对带内信号强度具有可忽略的衰减。