公开(公告)号：US07565111B2

公开(公告)日：2009-07-21

申请号：US10967605

申请日：2004-10-18

申请人： Eko Onggosanusi ,  Anand Dabak ,  Timothy Schmidl

发明人： Eko Onggosanusi ,  Anand Dabak ,  Timothy Schmidl

IPC分类号： H04B1/00

CPC分类号： H04L25/03299 ,  H04L25/0226 ,  H04L25/0236 ,  H04L25/025 ,  H04L25/03292 ,  H04L25/03305

摘要： A receiver (MST) for use in a modulated communications system wherein data is communicated in a time-slotted format. The receiver comprises circuitry (22) for providing samples of a group of data from the time-slotted format and circuitry (46, 42) for determining a first set of channel estimates in response to a first set of the samples. The receiver also comprises circuitry (30) for first predicting decisions for data in the group of data in response to the first set of channel estimates and circuitry (46, 42) for determining a second set of channel estimates in response to the predicted decisions. Lastly, the circuitry for predicting is further for second predicting decisions for data in the group of data in response to the second set of channel estimates.

摘要翻译： 一种用于调制通信系统的接收机（MST），其中以时隙格式传送数据。 接收机包括用于从时隙格式提供一组数据的样本的电路（22）和用于响应于第一组样本确定第一组信道估计的电路（46,42）。 接收机还包括电路（30），用于响应于第一组信道估计和电路（46,42）首先预测数据组中的数据的决定，以响应于预测的决定来确定第二组信道估计。 最后，用于预测的电路还用于响应于第二组信道估计来第二预测数据组中的数据的决定。

公开(公告)号：US20080069255A1

公开(公告)日：2008-03-20

申请号：US11939222

申请日：2007-11-13

申请人： Jaiganesh Balakrishnan ,  Anuj Batra ,  Anand Dabak

发明人： Jaiganesh Balakrishnan ,  Anuj Batra ,  Anand Dabak

IPC分类号： H04L27/00

CPC分类号： H04L1/0059 ,  H03M13/2707 ,  H04B1/7176 ,  H04B1/719 ,  H04L1/0068 ,  H04L1/0071 ,  H04L5/0007 ,  H04L5/0042 ,  H04L5/0044 ,  H04L5/0083

摘要： An efficient bit interleaving scheme for a multi-band OFDM ultra-wideband (UWB) system. The encoded bits of the multi-band OFDM system are interleaved within each OFDM symbol and across OFDM symbols. The bit interleaving scheme minimizes performance degradation due to groups of contiguous OFDM tones experiencing a poor SNR caused by the frequency selective channel, exploits the frequency diversity across sub-bands, randomizes the effect of co-channel interference from simultaneously operating un-coordinated piconets, and randomizes the impact of generic narrow-band interferers present within the UWB spectrum.

摘要翻译： 一种用于多频带OFDM超宽带（UWB）系统的有效位交织方案。 多频带OFDM系统的编码比特在每个OFDM符号内和OFDM符号之间进行交织。 比特交织方案最小化由于频率选择信道引起的差的SNR的连续OFDM音调组的性能下降，利用子频带上的频率分集，随机化来自同时操作的非协调微微网的同信道干扰的影响， 并随机化UWB频谱内存在的通用窄带干扰源的影响。

公开(公告)号：US20070004465A1

公开(公告)日：2007-01-04

申请号：US11427682

申请日：2006-06-29

申请人： Aris Papasakellariou ,  Timothy Schmidl ,  Eko Onggosanusi ,  Anand Dabak ,  Tarik Muharemovic

发明人： Aris Papasakellariou ,  Timothy Schmidl ,  Eko Onggosanusi ,  Anand Dabak ,  Tarik Muharemovic

IPC分类号： H04B1/38 ,  H04B1/04 ,  H01Q11/12 ,  H04M1/00

CPC分类号： H04W52/325 ,  H04W52/16 ,  H04W52/262 ,  H04W52/282

摘要： Embodiments of the invention provide method and structure for boosting pilot signal power relative to data signal power. The velocity of user equipment is obtained. The velocity measurement is used in determining the transmission power of the pilot signal and applying the increase to a plurality of pilots and decreasing the data signal power by a proportional amount.

摘要翻译： 本发明的实施例提供了相对于数据信号功率提升导频信号功率的方法和结构。 获得用户设备的速度。 速度测量用于确定导频信号的发射功率，并将增加量应用于多个导频，并将数据信号功率降低一定比例。

公开(公告)号：US20060280230A1

公开(公告)日：2006-12-14

申请号：US11438149

申请日：2006-05-22

申请人： Anand Dabak ,  Sundararajan Sriram ,  Srinath Hosur

发明人： Anand Dabak ,  Sundararajan Sriram ,  Srinath Hosur

IPC分类号： H04B1/00

CPC分类号： H04B1/7083 ,  H04B1/70735 ,  H04J13/00 ,  H04J13/12

摘要： A wireless communication system. The system comprises transmitter circuitry (BST1), the transmitter circuitry comprising encoder circuitry (50) for transmitting a plurality of frames (FR). Each of the plurality of frames comprises a primary synchronization code (PCS) and a secondary synchronization code (SSC). The encoder circuitry comprises of circuitry (501) for providing the primary synchronization code in response to a first sequence (32). The encoder circuitry further comprises circuitry (502) for providing the secondary synchronization code in response to a second sequence (54) and a third sequence (56). The second sequence is selected from a plurality of sequences. Each of the plurality of sequences is orthogonal with respect to all other sequences in the plurality of sequences. The third sequence comprises a subset of bits from the first sequence.

摘要翻译： 无线通信系统。 该系统包括发射机电路（BST1），该发射机电路包括用于传输多个帧（FR）的编码器电路（50）。 多个帧中的每一个包括主同步码（PCS）和辅同步码（SSC）。 编码器电路包括用于响应于第一序列（32）提供主同步码的电路（50 1）。 编码器电路还包括用于响应于第二序列（54）和第三序列（56）提供辅助同步码的电路（50）。 第二序列从多个序列中选择。 多个序列中的每一个相对于多个序列中的所有其他序列是正交的。 第三序列包括来自第一序列的比特的子集。

公开(公告)号：US20060233272A1

公开(公告)日：2006-10-19

申请号：US11379003

申请日：2006-04-17

申请人： Vasanthan Raghavan ,  Eko Onggosanusi ,  Anand Dabak

发明人： Vasanthan Raghavan ,  Eko Onggosanusi ,  Anand Dabak

IPC分类号： H04K1/10

CPC分类号： H04L27/2608 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0016 ,  H04L1/0026

摘要： The present invention provides a transmitter. In one embodiment, the transmitter includes a coefficient circuit configured to generate coefficients of a set of basis waveforms that represent channel quality metrics and a transmit circuit that transmits the coefficients. The present invention also provides a receiver. In one embodiment, the receiver includes a receive circuit configured to receive coefficients of a set of basis waveforms that represent channel quality metrics and a reconstruction circuit configured to reconstruct the channel quality metrics from the coefficients.

摘要翻译： 本发明提供一种发射机。 在一个实施例中，发射机包括被配置为生成表示信道质量度量的一组基本波形的系数的系数电路和发射系数的发射电路。 本发明还提供一种接收机。 在一个实施例中，接收机包括被配置为接收表示信道质量度量的一组基本波形的系数的接收电路，以及被配置为从系数重建信道质量度量的重构电路。

公开(公告)号：US20060029157A1

公开(公告)日：2006-02-09

申请号：US11199629

申请日：2005-08-09

申请人： Anand Dabak ,  Eko Onggosanusi

发明人： Anand Dabak ,  Eko Onggosanusi

IPC分类号： H04L27/20

CPC分类号： H04B7/0456 ,  H04B7/0417 ,  H04B7/0619 ,  H04L5/023 ,  H04L25/0206 ,  H04L27/2608

摘要： Various wireless precoding systems and methods are presented. In some embodiments, a wireless transmitter comprises an antenna preceding block, a transform block, and multiple transmit antennas. The antenna preceding block receives frequency coefficients from multiple data streams and distributes the frequency coefficients across multiple transmit signals in accordance with frequency-dependent matrices. The transform block transforms the precoded frequency coefficients into multiple time domain transmit signals to be transmitted by the multiple antennas. The frequency coefficients from multiple data streams may be partitioned into tone groups, and all the frequency coefficients from a given tone group may be redistributed in accordance with a single matrix for that tone group. In some implementations, the frequency coefficients within a tone group for a given data stream may also be precoded. In some alternative embodiments, tone group preceding may be employed in a single channel system.

摘要翻译： 提出了各种无线预编码系统和方法。 在一些实施例中，无线发射机包括先前块天线，变换块和多个发射天线。 天线先前块从多个数据流接收频率系数，并根据频率依赖矩阵在多个发射信号之间分配频率系数。 变换块将预编码的频率系数转换成由多个天线发射的多个时域发射信号。 来自多个数据流的频率系数可以被划分为音调组，并且来自给定音调组的所有频率系数可以根据该音调组的单个矩阵重新分配。 在一些实现中，给定数据流的音调组内的频率系数也可以被预编码。 在一些替代实施例中，可以在单个信道系统中采用先前的音调组。

公开(公告)号：US20050265467A1

公开(公告)日：2005-12-01

申请号：US11061977

申请日：2005-02-18

申请人： Anand Dabak ,  Jaiganesh Balakrishnan ,  Charles Sestok

发明人： Anand Dabak ,  Jaiganesh Balakrishnan ,  Charles Sestok

IPC分类号： H04K1/10 ,  H04L27/26

CPC分类号： H04L27/2647

摘要： A method comprising wirelessly transmitting and receiving a data signal in an orthogonal frequency division multiplexing (OFDM) system. The method further comprises, in the frequency domain, at least partially removing overlap between a first received subcarrier frequency data and a second received subcarrier frequency data.

摘要翻译： 一种在正交频分复用（OFDM）系统中无线发送和接收数据信号的方法。 该方法还包括在频域中至少部分地去除第一接收副载波频率数据和第二接收副载波频率数据之间的重叠。

公开(公告)号：US20050025223A1

公开(公告)日：2005-02-03

申请号：US10919469

申请日：2004-08-16

申请人： Anand Dabak ,  Eko Onggosanusi

发明人： Anand Dabak ,  Eko Onggosanusi

IPC分类号： H04B7/06 ,  H04B7/08 ,  H04B17/00 ,  H04B7/212 ,  H04B1/707

CPC分类号： H04B7/0615 ,  H04B7/0617 ,  H04B7/0634 ,  H04B7/0645 ,  H04B7/0654 ,  H04B7/0857 ,  H04B17/104 ,  H04B17/24

摘要： A wireless communication system (10). The system comprises a user station (12). The user station comprises despreading circuitry (22) for receiving and despreading a plurality of slots received from at least a first transmit antenna (A121) and a second transmit antenna (A122) at a transmitting station (14). Each of the plurality of slots comprises a first channel (DPCH) comprising a first set of pilot symbols and a second channel (PCCPCH) comprising a second set of pilot symbols. The user station further comprises circuitry (50) for measuring a first channel measurement (α1,n) for each given slot in the plurality of slots from the first transmit antenna and in response to the first set of pilot symbols in the given slot. The user station further comprises circuitry (50) for measuring a second channel measurement (α2,n) for each given slot in the plurality of slots from the second transmit antenna and in response to the first set of pilot symbols in the given slot. The user station further comprises circuitry (52) for measuring a phase difference value (φ2(n)) for each given slot in the plurality of slots in response to the first channel measurement and the second channel measurement for the given slot and in response to a ninety degree rotation of the given slot relative to a slot which was received by the despreading circuitry immediately preceding the given slot.