公开(公告)号：WO2007106366A2

公开(公告)日：2007-09-20

申请号：PCT/US2007005921

申请日：2007-03-07

Applicant: INTERDIGITAL TECH CORP ,  PAH JUNG-LIN ,  GRIECO DONALD M ,  SHAH NIRAV ,  OLESEN ROBERT L

Inventor： PAH JUNG-LIN ,  GRIECO DONALD M ,  SHAH NIRAV ,  OLESEN ROBERT L

IPC: H04L25/03 ,  H04B7/06

CPC classification number: H04L25/067 ,  H04B7/0689 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0606 ,  H04L1/0625 ,  H04L1/0631 ,  H04L1/0643 ,  H04L1/065 ,  H04L1/0668 ,  H04L5/023 ,  H04L25/03318 ,  H04L27/2647

Abstract: A method and apparatus for scaling a soft bit for decoding in a wireless communication system are described. A scaling factor is calculated for a received symbol based'on an estimated signal-to-noise ratio (SNR) of the received symbol and the scaling factor is applied to a soft bit of the received symbol. A multiple-input multiple-output (MIMO) scheme may be implemented to transmit multiple data streams. In such case, a soft bit of a received symbol on each data stream is scaled by a scaling factor for the received symbol on each data stream.

Abstract translation: 描述用于在无线通信系统中缩放用于解码的软比特的方法和装置。 基于接收符号的估计信噪比（SNR），基于接收符号计算缩放因子，并且缩放因子被应用于接收符号的软比特。 可以实现多输入多输出（MIMO）方案来传输多个数据流。 在这种情况下，在每个数据流上的接收符号的软比特被缩放为每个数据流上的接收符号的缩放因子。

公开(公告)号：WO2006118726A2

公开(公告)日：2006-11-09

申请号：PCT/US2006/012111

申请日：2006-04-03

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  GRIECO, Donald, M. ,  SHIN, Sung-Hyuk ,  TSAI, Yingming ,  ZHANG, Guodong ,  CHITRAPU, Prabhakar, R. ,  BRIANCON, Alain, Charles Louis ,  MARINIER, Paul ,  SHAN, TieJun ,  SHAH, Yogendra

Inventor： GRIECO, Donald, M. ,  SHIN, Sung-Hyuk ,  TSAI, Yingming ,  ZHANG, Guodong ,  CHITRAPU, Prabhakar, R. ,  BRIANCON, Alain, Charles Louis ,  MARINIER, Paul ,  SHAN, TieJun ,  SHAH, Yogendra

IPC: H04J11/00

CPC classification number: H04L27/2003 ,  H04L27/2614

Abstract: In a wireless communication system comprising at least one wireless transmit/receive unit (WTRU), a base station, and a radio network controller (RNC), a method for constant envelope orthogonal frequency division multiplexing (CE-OFDM) modulation comprises the WTRU performing an inverse transform on the data. The WTRU next performs constant envelope (CE) modulation on the data and transmits the CE-OFDM data to the base station. The base station receives the data and CE demodulates the data. The base station performs a transform on the demodulated data.

Abstract translation: 在包括至少一个无线发射/接收单元（WTRU），基站和无线电网络控制器（RNC）的无线通信系统中，用于恒包络正交频分复用（CE-OFDM）调制的方法包括WTRU执行 对数据进行逆变换。 WTRU接下来对数据执行恒定包络（CE）调制，并将CE-OFDM数据发送到基站。 基站接收数据，CE解调数据。 基站对解调数据进行变换。

公开(公告)号：WO2005050892A3

公开(公告)日：2005-06-02

申请号：PCT/US2004/038153

申请日：2004-11-13

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  BULTAN, Aykut ,  GRIECO, Donald, M.

Inventor： GRIECO, Donald, M.

IPC: H04B015/00

Abstract: The present invention is related to a method and apparatus for automatic frequency correction of a local oscillator. The apparatus receives a carrier signal. The carrier signal includes a code sequence known to the apparatus. The apparatus downconverts the carrier signal to a baseband signal using the local oscillator. The apparatus performs a block correlation of the samples of the baseband signal with the known code sequence to generate a frequency error signal. The frequency error signal is fed back to the local oscillator to correct the frequency error.

公开(公告)号：WO2005048506A2

公开(公告)日：2005-05-26

申请号：PCT/US2004/036564

申请日：2004-11-03

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  BULTAN, Aykut ,  GRIECO, Donald, M. ,  DENNEAN, Charles ,  PAN, Jung-Lin

Inventor： BULTAN, Aykut ,  GRIECO, Donald, M. ,  DENNEAN, Charles ,  PAN, Jung-Lin

IPC: H04L

CPC classification number: H04W56/0005 ,  H04B1/70757 ,  H04B7/2668 ,  H04B2201/70701

Abstract: A method and system for uplink (UL) synchronization of an uplink transmission from a plurality of wireless transmit/receive units (WTRUs) to a Node-B in a code division multiple access (CDMA) system. A Node-B receives a transmission including a UL synchronization (SYNC_UL) sequence from a WTRU. A sampler samples the transmission at a sampling rate which is higher than a chip rate. The samples are down-sampled and the SYNC_UL sequence is detected at a lower rate. A first significant path location of the detected SYNC_UL sequence is determined, and based on the first significant path location, a final significant path location is determined. The final significant path location is quantized and UpPCHPOS is transmitted to the WTRU to adjust a UL transmission timing.

Abstract translation: 用于在码分多址（CDMA）系统中从多个无线发射/接收单元（WTRU）到节点B的上行链路传输的上行链路（UL）同步的方法和系统。 节点B从WTRU接收包括UL同步（SYNC_UL）序列的传输。 采样器以高于码片速率的采样率对传输进行采样。 采样被降采样，SYNC_UL序列以较低的速率被检测到。 确定检测到的SYNC_UL序列的第一重要路径位置，并基于第一重要路径位置确定最终重要路径位置。 量化最终的有效路径位置并将UpPCHPOS发送到WTRU以调整UL传输定时。

公开(公告)号：WO2004084460A2

公开(公告)日：2004-09-30

申请号：PCT/US2004/007496

申请日：2004-03-12

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  HAIM, John, W. ,  TYRA, Fryderyk ,  GUCCIONE, Louis, J. ,  AXNESS, Timothy A. ,  GRIECO, Donald, M.

Inventor： HAIM, John, W. ,  TYRA, Fryderyk ,  GUCCIONE, Louis, J. ,  AXNESS, Timothy A. ,  GRIECO, Donald, M.

IPC: H04L

CPC classification number: H04W52/52 ,  H03G3/001 ,  H03G3/3052 ,  H03G3/3078

Abstract: An automatic gain control (AGC) method according to the present invention applies an initial gain by a digital AGC circuit in a timeslot is determined using a final calculated gain from the same timeslot in the previous frame together with an offset factor. An erase function is activated for a given data sample block when the number of saturated data samples that are detected within the block exceeds a threshold value. The power measurement made by the AGC circuit and used to update the gain is adjusted based on the number of measured data samples that are saturated. These elements provide a gain limiting function and allows limiting of the dynamic range for further signal processing.

Abstract translation: 根据本发明的自动增益控制（AGC）方法，利用来自前一帧中的相同时隙的最终计算的增益以及偏移因子来确定时隙中的数字AGC电路的初始增益。 当块内检测到的饱和数据样本的数量超过阈值时，给定的数据采样块激活擦除功能。 由AGC电路进行的用于更新增益的功率测量基于饱和的测量数据样本的数量进行调整。 这些元件提供增益限制功能，并允许限制用于进一步信号处理的动态范围。

公开(公告)号：WO2004064298A2

公开(公告)日：2004-07-29

申请号：PCT/US2004/000463

申请日：2004-01-08

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  PAN, Jung-Lin ,  HUANG, Yuejin ,  GRIECO, Donald, M.

Inventor： PAN, Jung-Lin ,  HUANG, Yuejin ,  GRIECO, Donald, M.

IPC: H04L

CPC classification number: H04B1/71052 ,  H04B1/71055 ,  H04B2201/70707 ,  H04L25/0206 ,  H04L25/0246

Abstract: Symbols are to be recovered from signals received in a shared spectrum. Codes of the signals received in the shared spectrum are processed using a block Fourier transform (FT), producing a code block diagonal matrix. A channel response of the received signals is estimated. The channel response is extended and modified to produce a block circulant matrix and a block FT is taken, producing a channel response block diagonal matrix. The code block diagonal matrix is combined with the channel response block diagonal matrix. The received signals are sampled and processed using the combined code block diagonal matrix and the channel response block diagonal matrix with a Cholesky algorithm. A block inverse FT is performed on a result of the Cholesky algorithm to produce spread symbols. The spread symbols are despread to recover symbols of the received signals.

Abstract translation: 符号将从在共享频谱中接收的信号中恢复。 使用块傅里叶变换（FT）处理在共享频谱中接收的信号的码，产生码块对角矩阵。 估计接收信号的信道响应。 信道响应被扩展和修改以产生块循环矩阵，并采用块FT，产生信道响应块对角矩阵。 码块对角矩阵与信道响应块对角矩阵组合。 使用Cholesky算法使用组合码块对角矩阵和信道响应块对角矩阵对接收到的信号进行采样和处理。 对Cholesky算法的结果执行块反向FT以产生扩展符号。 扩展符号被解扩以恢复接收信号的符号。