公开(公告)号：EP1606896A2

公开(公告)日：2005-12-21

申请号：EP04759634.1

申请日：2004-03-16

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

Inventor： YANG, Rui ,  GRIECO, Donald, M. ,  KAZAKEVICH, Leonid

IPC: H04B17/02

CPC classification number: H03G3/3052 ,  H03G3/3036 ,  H03G3/3042 ,  H03G3/3047 ,  H04L5/1484 ,  H04M3/40

Abstract: In a time-division duplex (TDD) system, a reliable initialization scheme that is applicable to an automatic gain controller (AGC) at a base station is implemented in various forms depending on the availability of certain information such as signal-to-interference ratio (SIR), spreading factors and other parameters. A more accurate estimation of the initial control word of a gain-adjustable amplifier for one or more time slots is implemented. The scheme is applicable to AGC initialization for each time slot of the TDD system, but is also applicable to other systems of transmission, without limitation.

公开(公告)号：EP3203654A1

公开(公告)日：2017-08-09

申请号：EP17161744.2

申请日：2007-09-28

Applicant: InterDigital Technology Corporation

Inventor： ZEIRA, Eldad ,  REZNIK, Alexander ,  YANG, Rui ,  PIETRASKI, Philip J. ,  YANG, Yongwen

IPC: H04B7/06 ,  H04L1/00 ,  H04L1/06 ,  H04L1/16 ,  H04L25/03 ,  H04B7/0417

CPC classification number: H04B7/0456 ,  G06F11/006 ,  H04B7/0417 ,  H04B7/0632 ,  H04B7/0634 ,  H04B7/0636 ,  H04B7/0639 ,  H04B7/0652 ,  H04L1/0026 ,  H04L1/0057 ,  H04L1/007 ,  H04L1/0073 ,  H04L1/06 ,  H04L1/1671 ,  H04L65/601 ,  H04L69/40 ,  H04L2025/03802 ,  H04L2209/34

Abstract: A method and apparatus for encoding channel quality indicator, CQI, bits, are disclosed.

The method comprises:
generating CQI bits (108);
encoding the CQI bits (104);
generating a signal conveying the CQI bits (106);
applying a gain factor b hs to the CQI bits and sending the encoded CQI bits (106);
wherein the gain factor b hs for the CQI bits is derived from a quantized amplitude ratio A hs =b hs /b c , wherein b c is a gain factor for a dedicated physical control channel, DPCCH, A hs is translated from Δ CQI , which is signalled by a higher layer, and the translation of Δ CQI into the quantized amplitude ratio A hs is performed in accordance with a predefined table.

Abstract translation: 公开了一种用于编码信道质量指示符CQI的比特的方法和设备。 该方法包括：生成CQI比特（108）; 编码CQI比特（104）; 生成传达CQI比特（106）的信号; 将增益因子bhs应用于CQI比特并发送编码的CQI比特（106）; 其中CQI比特的增益因子bhs是从量化的幅度比Ahs = bhs / bc导出的，其中bc是专用物理控制信道的增益因子，DPCCH，Ahs从ΔCQI转换，其由更高层 ，并且根据预定义的表格执行ΔCQI到量化幅度比Ahs的转换。

公开(公告)号：EP1908173B1

公开(公告)日：2014-04-30

申请号：EP06787487.5

申请日：2006-07-17

Applicant: InterDigital Technology Corporation

Inventor： BULTAN, Aykut ,  PAN, Kyle Jung-Lin ,  YANG, Rui ,  KEARNEY, Kenneth, P.

IPC: H04B1/00 ,  H03J7/04 ,  H03L7/00

CPC classification number: H03J7/04

公开(公告)号：EP1815601A2

公开(公告)日：2007-08-08

申请号：EP05813289.5

申请日：2005-10-19

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

Inventor： PIETRASKI, Philip, J. ,  YANG, Rui ,  BELURI, Mihaela ,  DEMIR, Alpaslan

IPC: H04B1/00 ,  H04L27/06

CPC classification number: H04B1/7097 ,  H04B1/712 ,  H04L25/03248

Abstract: A method and apparatus for estimating and correcting baseband frequency error in a receiver. In one embodiment, an equalizer performs equalization on a sample data stream and generates filter tap values based on the equalization. An estimated frequency error signal is generated based on at least one of the filter tap values. A rotating phasor is generated based on the estimated frequency error signal. The rotating phasor signal is multiplied with the sample data stream to correct the frequency of the sample data stream. In another embodiment, a channel estimator performs channel estimation and generates Rake receiver finger weights based on at least one of the finger weights. An estimated frequency error signal is generated based on at least one of the finger weights.

公开(公告)号：EP1687928A2

公开(公告)日：2006-08-09

申请号：EP04795890.5

申请日：2004-10-21

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

Inventor： PIETRASKI, Philip, J. ,  STERNBERG, Gregory, S. ,  YANG, Rui ,  LI, Bin

IPC: H04L5/12

CPC classification number: H04L1/0026 ,  H04L1/20 ,  H04L25/0202

Abstract: A method and apparatus for estimating and reporting the quality of a wireless communication channel between a wireless transmit/receive unit (WTRU) and a Node-B. A modulated signal is received from the Node-B over the communication channel and a channel estimation is performed on the modulated signal to provide a channel estimate. In one embodiment, the modulated signal is demodulated based on the channel estimate to provide a demodulated signal and a signal-to-interference (SIR) estimate based on the demodulated signal is obtained. The quality of the communication channel is estimated based on at least the SIR estimate. In an alternate embodiment, a SIR estimate based on the channel estimate is obtained. The quality of the communication channel is estimated based on the SIR estimate and additional information including at least one of delay spread, transmit power and WTRU velocity information.

公开(公告)号：EP1512237A2

公开(公告)日：2005-03-09

申请号：EP03734444.7

申请日：2003-06-05

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

Inventor： KAZAKEVICH, Leonid ,  YANG, Rui

IPC: H04B17/02

CPC classification number: H03G7/06 ,  H03G3/001 ,  H03M1/1235

Abstract: An analog/digital gain control device avoid some of the requirements associated with the nature of a closed-loop AGC circuits and which meets the remaining requirements without much difficulty uses an analog to digital conversion method that increases the number of effective ADC bits by compressing the baseband input analog signal using a logarithmic circuit. After the compressed analog signal is converted into a digital signal, a digital anti-log process or look-up table (LUT) is used to expand the digital signal back to the original linear scale. The word size of the output of the anti-log process is larger than the input word size due to the nature of the anti-log function. To reduce the word size of the digital signal an open loop normalization technique can be applied.

公开(公告)号：EP0966819B1

公开(公告)日：2005-01-12

申请号：EP98910290.0

申请日：1998-03-11

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

Inventor： MESECHER, David, K. ,  YANG, Rui ,  CERDA, Ramon

IPC: H04L27/233 ,  H04B1/707

CPC classification number: H04B1/7085 ,  H04B1/707 ,  H04B1/7117 ,  H04L27/0014 ,  H04L27/2332 ,  H04L2027/0053 ,  H04L2027/0055 ,  H04L2027/0069 ,  H04L2027/0081

公开(公告)号：EP1440523A1

公开(公告)日：2004-07-28

申请号：EP02789380.9

申请日：2002-11-01

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

Inventor： BOLOURCHI, Nader ,  KAZAKEVICH, Leonid ,  YANG, Rui

IPC: H04B1/707 ,  H04B7/02 ,  H04B7/216

CPC classification number: H01Q3/2611 ,  H04B7/0617 ,  H04B7/0669 ,  H04J13/0077 ,  H04W88/08

Abstract: The number of users (USER A, USER B) and data (dA, dB) capacity of wireless systems (Fig. 1) are increased by employing apparatus and method for increasing the number of spreading codes (CA, CB) available in the system by providing a mechanism to reuse the already allocated spreading code or use the codes that may correlate to those already being used within the same sector/cell. This, in return, provides capacity improvement proportional to the number of added base station (BS) antennas (1, 2, 3) for each cell. An antenna null steering technique for code allocation maintains the cross correlation properties of the codes only for the desired user and to obtain a gain in capacity improvement.

公开(公告)号：EP0966819A1

公开(公告)日：1999-12-29

申请号：EP98910290.0

申请日：1998-03-11

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

Inventor： MESECHER, David, K. ,  YANG, Rui ,  CERDA, Ram(RTM)n

IPC: H04L27 ,  H04B1 ,  H04B7

CPC classification number: H04B1/7085 ,  H04B1/707 ,  H04B1/7117 ,  H04L27/0014 ,  H04L27/2332 ,  H04L2027/0053 ,  H04L2027/0055 ,  H04L2027/0069 ,  H04L2027/0081

Abstract: A continuously adjusted bandwidth phase-locked loop is used by a B-CDMATM receiver to correct for any deviation, or offset, that may exist between the received radio frequency (RF) carrier signal and the frequency of the first stage LO that converts the received RF carrier signal to an intermediate frequency (IF). The PLL in the receiver includes a filter with an adjustable bandwith. A wider bandwidth is used during initial acquisition of the received signal. After the PLL has acquired the received carrier signal using the wider bandwidth, the bandwidth of the filter is gradually narrowed to provide a low steady-state error.