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1. 发明申请

WO2011066515A1 FORWARD LINK DATA RATE CONTROL AND RATE INDICATION FOR SATELLITE-ENABLED COMMUNICATIONS SYSTEMS 审中-公开
标题翻译：用于卫星通信系统的前向链路数据速率控制和速率指示
公开(公告)号：WO2011066515A1
公开(公告)日：2011-06-03
申请号：PCT/US2010/058248
申请日：2010-11-29
申请人： QUALCOMM Incorporated , TIAN, Bin , JALALI, Ahmad , JAYARAMAN, Srikant , NAMGOONG, June
发明人： TIAN, Bin , JALALI, Ahmad , JAYARAMAN, Srikant , NAMGOONG, June
IPC分类号： H04B7/185 , H04L1/00 , H04L1/08
CPC分类号： H04B7/18543 , H04L1/0002 , H04L1/0026 , H04L1/0028 , H04L1/08 , Y02D50/10
摘要： In a synchronous application to control forward link (FL) data rates in a satellite system, user equipment (UE) repeatedly transmits a quality control measurement (QCM) index during a QCM period. During this QCM period, the data rate cannot change. The associated satellite transmits at a new rate corresponding to the QCM index. The UE knows that it will begin receiving new data at the new rate after a QCM delay. In an asynchronous application, a satellite transmits a rate change signal over a FL rate indication channel (RICH). A UE monitors the FL RICH for this signal. When the signal quality is to be low, the satellite sends only a single bit of the QCM index over a first orthogonal channel. When the signal quality is not low, the satellite transmits each bit of the QCM index in a separate orthogonal channel of the FL RICH.
摘要翻译：在用于在卫星系统中控制前向链路（FL）数据速率的同步应用中，用户设备（UE）在QCM周期期间重复发送质量控制测量（QCM）索引。在这个QCM期间，数据速率不能改变。相关联的卫星以对应于QCM指数的新速率发射。 UE知道在QCM延迟之后，它将以新的速率开始接收新的数据。在异步应用中，卫星通过FL速率指示信道（RICH）发送速率改变信号。 UE监视该信号的FL RICH。当信号质量低时，卫星在第一个正交信道上只发送一个QCM索引的比特。当信号质量不低时，卫星在FL RICH的单独正交信道中发送QCM索引的每个比特。

2. 发明申请

WO2011066514A1 REVERSE LINK DATA RATE INDICATION FOR SATELLITE-ENABLED COMMUNICATION SYSTEMS 审中-公开
标题翻译：用于卫星通信系统的反向链路数据速率指示
公开(公告)号：WO2011066514A1
公开(公告)日：2011-06-03
申请号：PCT/US2010/058247
申请日：2010-11-29
申请人： QUALCOMM Incorporated , TIAN, Bin , JALALI, Ahmad , JAYARAMAN, Srikant , NAMGOONG, June
发明人： TIAN, Bin , JALALI, Ahmad , JAYARAMAN, Srikant , NAMGOONG, June
IPC分类号： H04L27/00 , H04L1/00
CPC分类号： H04L1/0025 , H04L1/0075
摘要： Reverse link data rate indications in wireless communication systems are defined with low identification overhead. Existence of a pilot signal is leveraged in order to reduce the overhead for identifying and selecting the reverse link data rate. At least two distinguishable pilot signals are defined, in which, based on the particular pilot signal present in the transmitted frame, at least one rate set from the multiple available rate sets can be determined. Reverse rate information in the transmitted frame is then used to identify which specific data rate within the determined rate set is used. Based on the identified data rate, the receiver may then decode the payload data in the transmitted frame.
摘要翻译：无线通信系统中的反向链路数据速率指示被定义为具有较低的识别开销。利用导频信号的存在以减少用于识别和选择反向链路数据速率的开销。定义了至少两个可区分的导频信号，其中，基于发送帧中存在的特定导频信号，可以确定从多个可用速率集合设置的至少一个速率。然后使用发送帧中的反向速率信息来确定使用所确定的速率集合内的哪个特定数据速率。基于所识别的数据速率，接收机然后可以解码发送帧中的有效载荷数据。

3. 发明申请

WO2008019251A1 ZERO-HEADER COMPRESSION FOR IMPROVED COMMUNICATION EFFICIENCY 审中-公开
标题翻译：用于改善通信效率的零压头压缩
公开(公告)号：WO2008019251A1
公开(公告)日：2008-02-14
申请号：PCT/US2007/074771
申请日：2007-07-30
申请人： QUALCOMM INCORPORATED , KUPPUSWAMY, Kalyan , NAMGOONG, June , JAYARAMAN, Srikant , JALALI, Ahmad , KAPOOR, Rohit
发明人： KUPPUSWAMY, Kalyan , NAMGOONG, June , JAYARAMAN, Srikant , JALALI, Ahmad , KAPOOR, Rohit
IPC分类号： H04L29/06
CPC分类号： H04W28/06 , H04L69/04 , H04L69/22 , H04W84/06
摘要： A communication system is disclosed in which a mobile terminal having limited power is able to communicate with a land-based network via a low-rate satellite communication link. To achieve VoIP communications via a low-rate link, link-layer assisted zero-header header compression techniques are employed to reduce VoIP packet overheads. Additionally, overheads introduced by link layer protocol layers are eliminated or reduced. A transmitting device strips RTP / UDP / IP header information from a stream of VoIP packets. The transmitting device then sends an initial context message providing the RTP / UDP / IP header information. The stripped zero-header VoIP packets are then transmitted via a satellite relay. A receiving device uses the initial context information to reconstruct the headers for the zero-header VoIP packets.
摘要翻译：公开了一种通信系统，其中具有有限功率的移动终端能够经由低速率卫星通信链路与陆基网络进行通信。为了通过低速率链路实现VoIP通信，采用链路层辅助的零标题报头压缩技术来减少VoIP分组开销。此外，消除或减少了由链路层协议层引入的开销。发送设备从VoIP数据包流中剥离RTP / UDP / IP头信息。然后，发送设备发送提供RTP / UDP / IP报头信息的初始上下文消息。然后通过卫星中继传输剥离的零标题VoIP数据包。接收设备使用初始上下文信息来重构零标题VoIP分组的报头。

4. 发明申请

WO2008014520A2 IMPROVEMENTS TO AN 1XEVDO WIRELESS INTERFACE TO ENABLE COMMUNICATIONS VIA A SATELLITE RELAY 审中-公开
标题翻译：改进1XEVDO无线接口，通过卫星继电器实现通信
公开(公告)号：WO2008014520A2
公开(公告)日：2008-01-31
申请号：PCT/US2007/074767
申请日：2007-07-30
申请人： QUALCOMM Incorporated , KUPPUSWAMY, Kalyan , NAMGOONG, June , JAYARAMAN, Srikant , JALALI, Ahmad
发明人： KUPPUSWAMY, Kalyan , NAMGOONG, June , JAYARAMAN, Srikant , JALALI, Ahmad
CPC分类号： H04B7/18567
摘要： A communication system is provided that allows a mobile terminal with an EVDO interface to perform VoIP communications via a satellite. The 1xEVDO physical layer frames and vocoder frames are synchronized and aligned to a known periodic time boundary for efficient transmission. A reverse link transmission rate is adjusted to match a VoIP packet source rate and operate the reverse link transmission channel to a satellite continuously. The reverse link transmission channel from a mobile terminal to a satellite may operate continuously and at a lower channel transmission rate to reduce the peak power amplifier power requirement. The higher layer time-out periods are increased to account for propagation delay to/from a satellite relay. A physical layer retransmit mechanism is disabled to ignore ACKs/ NACKs when sending VoIP packets via a satellite relay. A different channel code may be selective applied depending on the size/type of packets being transmitted.
摘要翻译：提供一种通信系统，其允许具有EVDO接口的移动终端经由卫星执行VoIP通信。 1xEVDO物理层帧和声码器帧被同步并对齐到已知的周期时间边界以进行有效传输。调整反向链路传输速率以匹配VoIP分组源速率并且连续地向卫星操作反向链路传输信道。从移动终端到卫星的反向链路传输信道可以连续地以较低的信道传输速率工作，以降低峰值功率放大器的功率需求。更高层的超时周期被增加以考虑到/从卫星中继的传播延迟。当通过卫星中继发送VoIP分组时，物理层重传机制被禁止忽略ACK / NACK。根据发送的分组的大小/类型，可以选择性地应用不同的信道码。

5. 发明申请

WO2008055207A2 RECIEVER FOR THE GEO SATELLITE REVERSE LINK USING TAIL-BITING CODE 审中-公开
标题翻译：使用尾巴定位代码接收GEO卫星反向链接
公开(公告)号：WO2008055207A2
公开(公告)日：2008-05-08
申请号：PCT/US2007/083173
申请日：2007-10-31
申请人： QUALCOMM Incorporated , JAYARAMAN, Srikant , NAMGOONG, June
发明人： JAYARAMAN, Srikant , NAMGOONG, June
CPC分类号： H04L25/025 , H03M13/413 , H03M13/6337 , H04L1/005 , H04L1/0054 , H04L1/0059 , H04L25/0228 , H04L25/0238 , H04L27/233 , H04L2027/003
摘要： A receiver for the GEO satellite reverse link, which uses the tail-biting convolutional code for error control, and methods to solve the problem of channel estimation is described. The channel estimate is initialized at each state using the pilot channel. Branch metric computation is used for circular decoding of the tail-biting convolutional code. The technique is effective when partial tail-biting is implemented.
摘要翻译：描述了用于GEO卫星反向链路的接收机，其使用尾巴卷积码进行错误控制，并且描述了解决信道估计问题的方法。使用导频信道在每个状态下初始化信道估计。分支度量计算用于尾部卷积码的循环解码。当实施部分尾巴时，该技术是有效的。

6. 发明申请

WO2005125134A1 METHOD AND APPARATUS FOR CHANNEL ESTIMATION USING PILOTS 审中-公开
标题翻译：使用PILOTS进行信道估计的方法和装置
公开(公告)号：WO2005125134A1
公开(公告)日：2005-12-29
申请号：PCT/US2005/021055
申请日：2005-06-14
申请人： QUALCOMM INCORPORATED , BLACK, Peter, J. , XU, Hao , NAMGOONG, June , JAYARAMAN, Srikant
发明人： BLACK, Peter, J. , XU, Hao , NAMGOONG, June , JAYARAMAN, Srikant
IPC分类号： H04L25/02
CPC分类号： H04L25/0204 , H04L25/0216 , H04L25/0234
摘要： A pilot assisted channel estimation process. A receiver may be configured to estimate the impulse response of a channel from a signal having pilot tones and spread-spectrum pilot signals. The receiver estimates the response of the channel from the pilot tones, and adapts the length of delay the channel response is estimated based on the spread-spectrum pilot signals.
摘要翻译：导频辅助信道估计过程。接收机可以被配置为从具有导频音调和扩频导频信号的信号估计信道的脉冲响应。接收机从导频音估计信道的响应，并根据扩频导频信号调整估计信道响应的延迟长度。

7. 发明申请

WO2008130443A2 DECODING OF THE OVERHEAD CHANNELS OF THE GEO SATELLITE REVERSE LINK 审中-公开
标题翻译：解读GEO卫星反向链路的超频信道
公开(公告)号：WO2008130443A2
公开(公告)日：2008-10-30
申请号：PCT/US2007/083242
申请日：2007-10-31
申请人： QUALCOMM Incorporated , JAYARAMAN, Srikant , NAMGOONG, June
发明人： JAYARAMAN, Srikant , NAMGOONG, June
IPC分类号： H04L25/03
CPC分类号： H04L25/0214 , H04B1/7075 , H04B2201/70701 , H04L25/0236
摘要： A power efficient technique is used to demodulate the coded overhead channels of a GEO satellite uplink. A coherent receiver used in a wireless communication system is able to determine the information conveyed in the overhead channel, by effecting channel estimates from codewords extracted from a pilot signal. A valid set of codewords is established. Pilot symbols are extracted from a pilot signal and a channel estimate is made from the pilot signal. Codewords in the set of valid codewords are correlated and a channel phase ambiguity in the signals is removed and a codeword with the largest correlation is chosen. The chosen codeword is used to create a revised channel estimate.
摘要翻译：使用功率有效的技术来解调GEO卫星上行链路的编码开销信道。在无线通信系统中使用的相干接收机能够通过从从导频信号提取的码字实现信道估计来确定在开销信道中传送的信息。建立一组有效的码字。从导频信号提取导频符号，并根据导频信号进行信道估计。有效码字集合中的代码字相关，信号中的信道相位模糊度被消除，并且选择具有最大相关性的码字。所选择的码字用于创建修改的信道估计。

8. 发明申请

WO2007024934A2 CHANNEL ESTIMATION IN COMMUNICATIONS 审中-公开
标题翻译：通信信道估计
公开(公告)号：WO2007024934A2
公开(公告)日：2007-03-01
申请号：PCT/US2006/032899
申请日：2006-08-22
申请人： QUALCOMM INCORPORATED , JAYARAMAN, Srikant , NAMGOONG, June
发明人： JAYARAMAN, Srikant , NAMGOONG, June
IPC分类号： H04L25/02
CPC分类号： H04L25/0232 , H04L25/0222 , H04L27/2647
摘要： A time averaging filter for channel estimation is described. Different time averaging is used for different taps or tones of a communication system. Two methods are suggested for determining the time-averaging filter for channel estimation for the communication systems without prior knowledge of SNR, channel Doppler and fading statistics. The first method includes a bank of different filters, each tuned for optimality in a certain range of SNR and Doppler. For each tone in the frequency domain (or tap in the time domain), the first method selects a filter among the set of filters that minimizes a certain computed metric. The second method directly computes, at each tone (or tap), the "best" filter in a least-squares sense, using empirically determined second-order statistics.
摘要翻译：描述了用于信道估计的时间平均滤波器。不同的时间平均用于通信系统的不同抽头或音调。建议两种方法用于确定用于通信系统的信道估计的时间平均滤波器，而无需SNR，信道多普勒和衰落统计信息。第一种方法包括一组不同的滤波器，每个滤波器在一定范围的SNR和多普勒中被调整为最佳。对于频域中的每个音调（或在时域中敲击），第一种方法选择一组过滤器，以使特定的计算度量最小化。第二种方法使用经验确定的二阶统计量，在每个音调（或抽头）处直接计算最小二乘法中的“最佳”滤波器。

9. 发明申请

WO2006118958A1 TIMING CONTROL IN ORTHOGONAL FREQUENCY DIVISION MULTIPLEX SYSTEMS BASED ON EFFECTIVE SIGNAL-TO-NOISE RATIO 审中-公开
标题翻译：基于有效信号噪声比的正交频分多系统的时序控制
公开(公告)号：WO2006118958A1
公开(公告)日：2006-11-09
申请号：PCT/US2006/016063
申请日：2006-04-26
申请人： QUALCOMM INCORPORATED , JAYARAMAN, Srikant , XU, Hao , NAMGOONG, June , MANGAN, Michael, John , BLACK, Peter, J.
发明人： JAYARAMAN, Srikant , XU, Hao , NAMGOONG, June , MANGAN, Michael, John , BLACK, Peter, J.
IPC分类号： H04L27/26 , H04L1/20
CPC分类号： H04L27/2662 , H04L1/20 , H04L5/0048 , H04L27/2695 , H04L2001/0093
摘要： A spread-spectrum communication system provides an effective signal-to-noise ratio (SNR) of received orthogonal frequency division multiplex (OFDM) slots in the presence of timing errors. Effective SNR can serve as a diagnostic tool for determining whether there was a timing error when a measured packet error rate (PER) remains high, and a predicted PER from the effective SNR remains low. A loop can use the effective SNR to control a time reference used by an OFDM decoder.
摘要翻译：在存在定时误差的情况下，扩频通信系统提供接收的正交频分复用（OFDM）时隙的有效信噪比（SNR）。当测量的分组错误率（PER）保持为高时，有效SNR可以用作确定是否存在定时误差的诊断工具，并且来自有效SNR的预测的PER保持为低。循环可以使用有效SNR来控制OFDM解码器使用的时间参考。

10. 发明申请

WO2006034020A1 NOISE VARIANCE ESTIMATION IN WIRELESS COMMUNICATIONS FOR DIVERSITY COMBINING AND LOG-LIKELIHOOD SCALING 审中-公开
标题翻译：无线通信中的多样性组合和日志比例缩放的噪声变化估计
公开(公告)号：WO2006034020A1
公开(公告)日：2006-03-30
申请号：PCT/US2005/033133
申请日：2005-09-16
申请人： QUALCOMM INCORPORATED , NAMGOONG, June , XU, Hao , BLACK, Peter J. , JAYARAMAN, Srikant
发明人： NAMGOONG, June , XU, Hao , BLACK, Peter J. , JAYARAMAN, Srikant
IPC分类号： H04L27/26 , H04B1/10
CPC分类号： H04L1/20 , H04B1/1027 , H04L27/2647
摘要： Noise variance estimation in wireless communications. Noise variance estimation includes receiving a signal 402 including an OFDM symbol having, in-band tones including in-band pilot tones, and band-edge tones including band-edge pilot tones and guard tones, estimating an effective noise variance for the in-band tones 702using the in-band pilot tones and channel estimates for the in-band pilot tones, and estimating an effective noise variance for the band-edge tones 704 using the band-edge pilot tones, channel estimates for the band-edge pilot tones, and the guard tones.
摘要翻译：无线通信中的噪声方差估计。噪声方差估计包括接收包括具有包括带内导频音频的带内音调和包括带边导频音和保护音的带边音调的OFDM符号的信号402，估计带内有效噪声方差使用带内导频音调和带内导频音调的信道估计的音调702，以及使用带边导频音，带边导频音调的信道估计，估计频带边缘音调704的有效噪声方差，和保护音。

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