公开(公告)号：AU2003297901A1

公开(公告)日：2004-06-30

申请号：AU2003297901

申请日：2003-12-10

Applicant: QUALCOMM INC

Inventor： CHEN QINGXIN ,  PATEL SHIMMAN

IPC: H04W24/02 ,  H04L1/00 ,  H04L1/20 ,  H04Q7/38

Abstract: Techniques to detect for DTX frames in a "primary" transmission that may be sent in a non-continuous manner using a "secondary" transmission that is sent during periods of no transmission for the primary transmission. The primary and secondary transmissions may be the ones sent on the F-DCCH and Forward Power Control Subchannel, respectively, in an IS-2000 system. In one method, a determination is first made whether or not a frame received for the primary transmission in a particular frame interval is a good frame (e.g., based on CRC). If the received frame is not a good frame, then a determination is next made whether the received frame is a DTX frame or an erased frame based on a number of metrics determined for the primary and secondary transmissions. The metrics may include symbol error rate of the received frame, secondary transmission (e.g., PC bit) energy, and received frame energy.

公开(公告)号：AU2002248333A1

公开(公告)日：2002-08-12

申请号：AU2002248333

申请日：2002-01-11

Applicant: QUALCOMM INC

Inventor： RICK ROLAND ,  SUBRAHMANYA PARVATHANATHAN ,  BUTLER BRIAN ,  PATEL SHIMMAN ,  EKVETCHAVAT THUNACHATE

IPC: H04B7/06 ,  H04B7/08 ,  H04B1/707

Abstract: In an antenna diversity environment, the timing offset of the receiver's fingers are based on the timing offset of the received peaks of the base station transmit signals. In a system with non-negligible multipath spacing, the timing offset of the received peaks of the base station transmit signals are not necessarily at the same location. In one embodiment, the demodulating elements for the signal from each base station antenna use the same offset for demodulating and determining an error signal based on pilot signal sampling prior to the timing offset and subsequent to the timing offset. The error signals are averaged and used by a time tracking loop to track the incoming signal. In another embodiment, the demodulating elements for the signal from each base station antenna independently time track the signals with different timing offsets for each finger. The preferred embodiment depends on the method used by the base station to multiplex the data onto multiple transmit antennas.

公开(公告)号：CA2437399A1

公开(公告)日：2002-08-08

申请号：CA2437399

申请日：2002-01-31

Applicant: QUALCOMM INC

Inventor： WILBORN THOMAS BRIAN ,  SIH GILBERT C ,  PATEL SHIMMAN ,  ABRISHAMKAR FARROKH

IPC: G01S11/02 ,  G01S19/25 ,  G01S19/26

Abstract: A velocityx estimate is determined from a recevied signal by counting the number of times a signal in one multipath crosses a predetermined threshold in a given amount of time. A signal is received and a single multipath is extracted from the received signal. Instantaneous envelope values of the extracted multipath are calculated. A plurality of the instantaneous envelop e valures are used to calculate a running RMS value. A level crossing threshol d is determined using the running RMS value. The number of times the instantaneous envelope value crosses the level crossing threshold is counted . The number of level crossings is mapped to a velocity estimate.

公开(公告)号：NO20021002L

公开(公告)日：2002-03-15

申请号：NO20021002

申请日：2002-02-28

Applicant: QUALCOMM INC

Inventor： CHEN TAO ,  PATEL SHIMMAN

IPC: H04B7/005 ,  H03M13/45 ,  H04L1/00 ,  H04L1/20 ,  H04L27/30 ,  H04W52/26

Abstract: Techniques for detecting zero rate frames in a received data transmission. A modulated signal is received and demodulated in accordance with a particular demodulation format to generate demodulated symbols. The demodulated symbols are partitioned into a number of received frames. For each received frame, a quality metric is computed and compared against a threshold value. The threshold value is selected based, in part, on the quality metrics of received frames. Based on the comparison result, the received frame is indicated as being either transmitted and received in error (i.e., erased or bad) or not transmitted at all (i.e., zero rate or empty). The quality metric can relate to an energy of a received frame, a distance between a received frame and a codeword corresponding to the received frame, or other metrics. The threshold value can be selected based on the quality metrics computed for decoded frames or received frames identified as good, and can be dynamically adjusted based on current information available at the receiver. The method is advantageously used in a CDMA communications system.

公开(公告)号：NO20021002D0

公开(公告)日：2002-02-28

申请号：NO20021002

申请日：2002-02-28

Applicant: QUALCOMM INC

Inventor： CHEN TAO ,  PATEL SHIMMAN

IPC: H04B7/005 ,  H03M13/45 ,  H04L1/00 ,  H04L1/20 ,  H04L27/30 ,  H04W52/26 ,  H04L

Abstract: Techniques for detecting zero rate frames in a received data transmission. A modulated signal is received and demodulated in accordance with a particular demodulation format to generate demodulated symbols. The demodulated symbols are partitioned into a number of received frames. For each received frame, a quality metric is computed and compared against a threshold value. The threshold value is selected based, in part, on the quality metrics of received frames. Based on the comparison result, the received frame is indicated as being either transmitted and received in error (i.e., erased or bad) or not transmitted at all (i.e., zero rate or empty). The quality metric can relate to an energy of a received frame, a distance between a received frame and a codeword corresponding to the received frame, or other metrics. The threshold value can be selected based on the quality metrics computed for decoded frames or received frames identified as good, and can be dynamically adjusted based on current information available at the receiver. The method is advantageously used in a CDMA communications system.

公开(公告)号：EP3295734A1

公开(公告)日：2018-03-21

申请号：EP16714677

申请日：2016-03-18

Applicant: QUALCOMM INC

Inventor： MALLADI DURGA PRASAD ,  WANG JUN ,  WEI YONGBIN ,  PATEL SHIMMAN ,  DAMNJANOVIC ALEKSANDAR ,  GRIOT MIGUEL ,  ZHANG XIAOXIA

IPC: H04W72/00

CPC classification number: H04W4/06 ,  H04L12/189 ,  H04W16/14 ,  H04W72/005

Abstract: A method, an apparatus, and a computer-readable medium for delivering content to end user via shared broadcast are provided. The apparatus may be a UE that determines to acquire a MBMS service. The UE tunes to a frequency provided by a first MNO to which the UE is not a subscriber in order to receive the MBMS service via a carrier shared by the first MNO and at least one other MNO. The UE receives the MBMS service on the frequency via the carrier shared by the first MNO and the at least one other MNO. The shared carrier may have a common SFN timing with respect to the first MNO and the at least one other MNO. The shared carrier may include a shared MBMS SDL carrier. The shared carrier may include a standalone shared carrier for receiving the MBMS service and control information associated with the MBMS service.

公开(公告)号：WO2016086093A3

公开(公告)日：2016-07-21

申请号：PCT/US2015062596

申请日：2015-11-25

Applicant: QUALCOMM INC

Inventor： XU HAO ,  DAMNJANOVIC ALEKSANDAR ,  DABEER ONKAR JAYANT ,  GAAL PETER ,  CHEN WANSHI ,  PATEL SHIMMAN ,  WEI YONGBIN ,  MALLADI DURGA PRASAD

IPC: H04W74/00 ,  H04J11/00 ,  H04W72/12 ,  H04W74/02 ,  H04W74/08

CPC classification number: H04W72/0413 ,  H04J11/0023 ,  H04L1/1812 ,  H04L5/0037 ,  H04W28/0278 ,  H04W72/1294 ,  H04W72/14 ,  H04W74/006 ,  H04W74/008 ,  H04W74/02 ,  H04W74/08 ,  H04W74/0858 ,  H04W76/046

Abstract: Certain aspects relate to methods and apparatus for latency reduction for UEs in a RRC connected mode. During contention-based uplink access by groups of UEs within a subframe, an eNB may decode the received uplink transmission based, at least in part, on the assigned group of resources assigned to the UE and used for transmission. Additional orthogonalization techniques such as reduced TTI size can be used to reduce collisions among different users performing contention-based transmissions. Furthermore, when the eNB fails to successfully decode the uplink transmission, the eNB may identify the UE that sent the uplink transmission based on a detected reference signal and may transmit an uplink assignment to the identified UE.

Abstract translation: 某些方面涉及用于RRC连接模式中的UE的等待时间减少的方法和装置。 在子帧内UE组的基于竞争的上行链路接入期间，eNB可以至少部分地基于分配给UE并且用于传输的分配的资源组来解码接收到的上行链路传输。 诸如减小的TTI大小之类的附加正交化技术可用于减少执行基于竞争的传输的不同用户之间的冲突。 此外，当eNB未能成功解码上行链路传输时，eNB可以基于检测到的参考信号来识别发送上行链路传输的UE，并且可以向所识别的UE发送上行链路分配。

公开(公告)号：WO2009148948A3

公开(公告)日：2010-05-14

申请号：PCT/US2009045619

申请日：2009-05-29

Applicant: QUALCOMM INC ,  MICHAEL MATTHEW ,  VEEREPALLI SIVARAMAKRISHNA ,  PATEL SHIMMAN ,  LI TAO

Inventor： MICHAEL MATTHEW ,  VEEREPALLI SIVARAMAKRISHNA ,  PATEL SHIMMAN ,  LI TAO

IPC: H04H60/33 ,  H04H20/08 ,  H04H60/46 ,  H04N5/445

CPC classification number: H04N21/431 ,  H04H20/08 ,  H04H20/28 ,  H04H20/93 ,  H04H60/31 ,  H04H60/33 ,  H04H60/46 ,  H04H60/64 ,  H04H2201/30 ,  H04H2201/33 ,  H04H2201/37 ,  H04H2201/40 ,  H04N5/44543 ,  H04N5/44591 ,  H04N7/17327 ,  H04N21/4126 ,  H04N21/414 ,  H04N21/41407 ,  H04N21/436 ,  H04N21/4384 ,  H04N21/44222 ,  H04N21/4532 ,  H04N21/4858 ,  H04N21/6582

Abstract: Various techniques for receiving broadcast at a mobile broadcast receiver are described. In an aspect, the broadcast receiver provides user notification and/or automatically launches an application based on user preferences. In another aspect, the broadcast receiver improves channel switching time by predicting future channel selection based on real-time monitoring of user inputs. In another aspect, the broadcast receiver supports drag-and-drop user interface. In another aspect, the broadcast receiver provides additional information associated with a selected broadcast stream. In another aspect, the broadcast receiver processes a broadcast stream and sends output data to an external device for further processing and/or display. In another aspect, the broadcast receiver simultaneously displays live content and stored content. In another aspect, the broadcast receiver simultaneously receives multiple broadcast streams for displayed on one or more display units. In another aspect, the broadcast receiver collects user statistics and sends the statistics to a network entity.

Abstract translation: 描述了用于在移动广播接收机处接收广播的各种技术。 在一方面，广播接收机提供用户通知和/或基于用户偏好自动启动应用。 在另一方面，广播接收机通过基于对用户输入的实时监控来预测将来的频道选择来改善频道切换时间。 另一方面，广播接收机支持拖放用户界面。 在另一方面，广播接收机提供与选择的广播流相关联的附加信息。 在另一方面，广播接收机处理广播流并将输出数据发送到外部设备用于进一步的处理和/或显示。 另一方面，广播接收机同时显示实况内容和存储的内容。 在另一方面，广播接收机同时接收多个广播流以在一个或多个显示单元上显示。 另一方面，广播接收机收集用户统计信息并将统计信息发送到网络实体。

公开(公告)号：WO2009046009A3

公开(公告)日：2009-05-28

申请号：PCT/US2008078276

申请日：2008-09-30

Applicant: QUALCOMM INC ,  MONTOJO JUAN ,  MALLADI DURGA PRASAD ,  PATEL SHIMMAN

Inventor： MONTOJO JUAN ,  MALLADI DURGA PRASAD ,  PATEL SHIMMAN

IPC: H04L27/26

CPC classification number: H04L27/2647 ,  H04L5/1484 ,  H04L27/2607

Abstract: Techniques for performing partial cyclic prefix discarding are described. A user equipment (UE) may reduce the amount of cyclic prefix to discard for the last OFDM symbol prior to a switch from data reception to data transmission. This may allow the UE to complete data reception earlier and to switch to data transmission in a timely manner. In one design, the UE may receive a first OFDM symbol and discard a first amount of cyclic prefix for the first OFDM symbol. The UE may then receive a second OFDM symbol and discard a second amount of cyclic prefix for the second OFDM symbol. The second amount of cyclic prefix to discard may be determined based on the amount of time needed to switch from data reception to data transmission, which may be dependent on the amount of time advance between transmit timing and receive timing at the UE.

Abstract translation: 描述了用于执行部分循环前缀丢弃的技术。 用户设备（UE）可以在从数据接收切换到数据传输之前减少最后OFDM符号丢弃的循环前缀量。 这可以允许UE更早地完成数据接收并及时切换到数据传输。 在一种设计中，UE可以接收第一OFDM符号并丢弃第一OFDM符号的第一量的循环前缀。 UE然后可以接收第二OFDM码元并丢弃第二OFDM码元的第二量的循环前缀。 可以基于从数据接收切换到数据传输所需的时间量来确定丢弃的循环前缀的第二量，这可能取决于在UE处的发送时序与接收时序之间的时间提前量。

公开(公告)号：WO2008133751A3

公开(公告)日：2009-04-30

申请号：PCT/US2007087792

申请日：2007-12-17

Applicant: QUALCOMM INC ,  GLAZKO SERGUEI A ,  BECKMAN JAMES EDWARD ,  PATEL SHIMMAN

Inventor： GLAZKO SERGUEI A ,  BECKMAN JAMES EDWARD ,  PATEL SHIMMAN

IPC: H04B1/10 ,  H04L27/26

CPC classification number: H04L27/2647 ,  H04B1/1036 ,  H04K3/228

Abstract: Techniques for detecting and suppressing jammers are described. A receiver may perform post-FFT jammer detection and pre-FFT jammer suppression. The receiver may transform an input signal to obtain a frequency-domain signal and may detect for jammers in the input signal based on the frequency-domain signal. The receiver may determine powers of a plurality of carriers based on the frequency-domain signal and may detect for jammers based on peaks in the powers of these carriers. The receiver may filter the input signal (e.g., with a notch filter) to suppress the detected jammers. Alternatively or additionally, the receiver may perform post-FFT jammer detection and post-FFT jammer suppression. The receiver may determine whether jammer is present on each carrier based on data power and channel power for that carrier. The receiver may modify (e.g., zero out or reduce) the frequency-domain signal on carriers with detected jammers.

Abstract translation: 描述了用于检测和抑制干扰的技术。 接收机可以执行FFT后干扰检测和预FFT干扰抑制。 接收机可以变换输入信号以获得频域信号，并且可以基于频域信号来检测输入信号中的干扰。 接收机可以基于频域信号来确定多个载波的功率，并且可以基于这些载波的功率的峰值来检测干扰。 接收机可以过滤输入信号（例如，使用陷波滤波器）来抑制检测到的干扰。 或者或另外，接收机可以执行FFT后干扰检测和FFT后干扰抑制。 接收机可以基于该载波的数据功率和信道功率来确定每个载波上是否存在干扰信号。 接收机可以利用检测到的干扰来修改（例如，零或降低）载波上的频域信号。