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1. 发明申请

WO2006023705A1 UNIFIED PULSE SHAPING FOR MULTI-CARRIER AND SINGLE-CARRIER WAVEFORMS 审中-公开
标题翻译：用于多载波和单载波波形的统一脉冲形状
公开(公告)号：WO2006023705A1
公开(公告)日：2006-03-02
申请号：PCT/US2005/029506
申请日：2005-08-19
申请人： QUALCOMM INCORPORATED , GORE, Dhananjay Ashok , AGRAWAL, Avneesh , KHANDEKAR, Aamod
发明人： GORE, Dhananjay Ashok , AGRAWAL, Avneesh , KHANDEKAR, Aamod
IPC分类号： H04L27/26
CPC分类号： H04L5/0048 , H04L5/0007 , H04L5/0044 , H04L25/03834 , H04L27/0008 , H04L27/2607 , H04L27/2626 , H04L27/2647
摘要： To transmit a multi-carrier signal, a transmitter provides zero symbols for guard subbands, performs OFDM modulation, and filters the resultant time-domain samples with a pulse shaping filter. To transmit a single-carrier signal, the transmitter partitions the single-carrier signal into segments. Each segment contains up to K samples and is padded, if needed, to the length of an OFDM symbol. Each padded segment is transformed from the time domain to the frequency domain to generate a corresponding frequency-domain segment with K symbols. For each frequency-domain segment, the symbols corresponding to the guard subbands are set to zero. Each frequency-domain segment is then transformed from the frequency domain to the time domain to generate a corresponding time-domain segment. A cyclic prefix may or may not be appended to each time-domain segment. Each time-domain segment is filtered with the same pulse shaping filter to generate an output waveform for the single-carrier signal.
摘要翻译：为了发送多载波信号，发射机为保护子带提供零符号，执行OFDM调制，并用脉冲整形滤波器对合成的时域采样进行滤波。为了发送单载波信号，发射机将单载波信号分割成段。每个段包含多达K个样本，并且如果需要，则填充到OFDM符号的长度。每个填充段从时域变换到频域，以产生具有K个符号的对应的频域段。对于每个频域段，对应于保护子带的符号被设置为零。然后将每个频域段从频域变换到时域以产生对应的时域段。循环前缀可以附加到每个时域段，也可以不附加到每个时域段。每个时域分段用相同的脉冲整形滤波器滤波，以产生单载波信号的输出波形。

2. 发明申请

WO2006020021A1 INCREMENTAL PILOT INSERTION FOR CHANNEL AND INTERFERENCE ESTIMATION 审中-公开
标题翻译：用于通道和干扰估计的增量试点插入
公开(公告)号：WO2006020021A1
公开(公告)日：2006-02-23
申请号：PCT/US2005/025157
申请日：2005-07-15
申请人： QUALCOMM INCORPORATED , GORE, Dhananjay, Ashok , AGRAWAL, Avneesh , KHANDEKAR, Aamod
发明人： GORE, Dhananjay, Ashok , AGRAWAL, Avneesh , KHANDEKAR, Aamod
IPC分类号： H04L27/26
CPC分类号： H04L25/0226 , H04L5/0007 , H04L5/005 , H04L5/0051 , H04L5/006
摘要： Dynamic resource allocation systems, apparatus, and methods are disclosed for selectively improving the ability of a receiver to determine a channel estimate in an Orthogonal Frequency Division Multiple Access (OFDMA) system. A wireless communication system can use a common pilot channel configuration to aid channel estimation in one or more receivers in communication with the system. A receiver in communication with the system may be unable to demodulate received data due to an inaccurate channel estimate. The receiver can communicate to a transmitter in the system a request for additional channel estimation resources. The wireless communication system can provide additional channel estimation resources by inserting dedicated pilot channels into one or more of the frequencies allocated to symbols for the receiver. If the receiver is still unable to demodulate received data, the wireless communication system can incrementally insert additional pilot channels in the symbol associated with the receiver.
摘要翻译：公开了动态资源分配系统，装置和方法，用于选择性地提高接收机在正交频分多址（OFDMA）系统中确定信道估计的能力。无线通信系统可以使用公共导频信道配置来辅助与系统通信的一个或多个接收机中的信道估计。与系统通信的接收机可能由于不准确的信道估计而无法解调所接收的数据。接收机可以向系统中的发射机通信另外的信道估计资源的请求。无线通信系统可以通过将专用导频信道插入分配给接收机的符号的一个或多个频率来提供额外的信道估计资源。如果接收机仍然不能解调所接收的数据，则无线通信系统可以递增地在与接收机相关联的符号中插入附加的导频信道。

3. 发明申请

WO2006019709A1 FREQUENCY DOMAIN FILTERING TO IMPROVE CHANNEL ESTIMATION IN MULTICARRIER SYSTEMS 审中-公开
标题翻译：频域滤波以提高多媒体系统中的信道估计
公开(公告)号：WO2006019709A1
公开(公告)日：2006-02-23
申请号：PCT/US2005/024613
申请日：2005-07-11
申请人： QUALCOMM INCORPORATED , GORE, Dhananjay Ashok , AGRAWAL, Avneesh , KHANDEKAR, Aamod , GOROKHOV, Alexei
发明人： GORE, Dhananjay Ashok , AGRAWAL, Avneesh , KHANDEKAR, Aamod , GOROKHOV, Alexei
IPC分类号： H04L27/26
CPC分类号： H04L27/2647 , H04L5/0007 , H04L5/0048 , H04L5/006 , H04L25/022 , H04L25/0226 , H04L25/023
摘要： A channel estimation system comprises a filtering component that selectively scales a plurality of carriers as a function of location of the plurality of carriers within a frequency band, wherein the plurality of carriers comprises at least one data carrier and at least one pilot carrier. A component thereafter extrapolates an observation from the at least one pilot carrier, wherein a channel is estimated as a function of the extrapolated observation. The scaling of the carriers facilitates reducing a flooring effect associated with channel estimation. The filtering component can be employed at a transmitter and/or at a receiver, and can be activated and/or deactivated as a function of a sensed data packet type.
摘要翻译：信道估计系统包括滤波部件，其选择性地按照频带内的多个载波的位置来缩放多个载波，其中多个载波包括至少一个数据载波和至少一个导频载波。然后，组件从至少一个导频载波外推观测，其中，估计信道作为外推观测的函数。载波的缩放有助于减少与信道估计相关的地板效应。滤波组件可以在发射机和/或接收机处采用，并且可以作为感测数据分组类型的功能被激活和/或去激活。

4. 发明申请

WO2007051155A2 PILOT SYMBOL TRANSMISSION IN WIRELESS COMMUNICATION SYSTEMS 审中-公开
标题翻译：无线通信系统中的导频符号传输
公开(公告)号：WO2007051155A2
公开(公告)日：2007-05-03
申请号：PCT/US2006/060287
申请日：2006-10-26
申请人： QUALCOMM INCORPORATED , KHANDEKAR, Aamod , AGRAWAL, Avneesh , GORE, Dhananjay Ashok
发明人： KHANDEKAR, Aamod , AGRAWAL, Avneesh , GORE, Dhananjay Ashok
CPC分类号： H04J13/102 , H04B1/713 , H04L5/0026 , H04L5/0051 , H04L25/0204 , H04L25/0226 , H04L25/03866
摘要： Pilot symbols transmitted from different sectors of a same base station are multiplied with a same cell specific scrambling code and a first code having low cross correlation and second codes having low cross correlation. The second code is constant over the length of the first code, but may vary for repetitions of the first code.
摘要翻译：从相同基站的不同扇区发送的导频符号与相同的小区专用扰码和具有低互相关的第一码和具有低互相关的第二码相乘。第二个代码在第一个代码的长度上是恒定的，但是对于第一个代码的重复可能会有所不同。

5. 发明申请

WO2005076558A1 PILOT TRANSMISSION AND CHANNEL ESTIMATION FOR AN OFDM SYSTEM WITH EXCESS DELAY SPREAD 审中-公开
标题翻译：具有超越延迟扩展的OFDM系统的导频传输和信道估计
公开(公告)号：WO2005076558A1
公开(公告)日：2005-08-18
申请号：PCT/US2004/040959
申请日：2004-12-07
申请人： QUALCOMM INCORPORATED , GORE, Dhananjay, Ashok , AGRAWAL, Avneesh
发明人： GORE, Dhananjay, Ashok , AGRAWAL, Avneesh
IPC分类号： H04L27/26
CPC分类号： H04L25/0226 , H04L5/0007 , H04L5/0048 , H04L25/0202 , H04L25/0212 , H04L27/2607 , H04L27/2647
摘要： Pilot transmission and channel estimation techniques for an OFDM system with excess delay spread are described. To mitigate the deleterious effects of excess delay spread, the number of pilot subbands is greater than the cyclic prefix length. This "oversampling" may be achieved by using more pilot subbands in each symbol period or different sets of pilot subbands in different symbol periods. In one channel estimation technique, first and second groups of received pilot symbols are obtained for first and second pilot subband sets, respectively, and used to derive first and second frequency response estimates, respectively. First and second impulse response estimates are derived based on the first and second frequency response estimates, respectively, and used to derive a third impulse response estimate having more taps than the number of pilot subbands in either set.
摘要翻译：描述了具有超延迟扩展的OFDM系统的导频传输和信道估计技术。为了减轻多余的延迟扩展的有害影响，导频子带的数量大于循环前缀长度。这种“过采样”可以通过在每个符号周期中使用更多的导频子带或在不同的符号周期内使用不同的导频子带集来实现。在一个信道估计技术中，分别为第一和第二导频子带集获得第一组和第二组接收导频符号，并分别用于导出第一和第二频率响应估计。基于第一和第二频率响应估计分别导出第一和第二脉冲响应估计，并且用于导出具有比两组中的导频子带数更多的抽头的第三脉冲响应估计。

6. 发明申请

WO2006010159A1 ITERATIVE CHANNEL AND INTERFERENCE ESTIMATION WITH DEDICATED PILOT TONES FOR OFDMA 审中-公开
标题翻译：用于OFDMA的专用通道和干扰估计
公开(公告)号：WO2006010159A1
公开(公告)日：2006-01-26
申请号：PCT/US2005/025609
申请日：2005-07-18
申请人： QUALCOMM INCORPORATED , GOROKHOV, Alexei , AGRAWAL, Avneesh , GORE, Dhananjay Ashok
发明人： GOROKHOV, Alexei , AGRAWAL, Avneesh , GORE, Dhananjay Ashok
IPC分类号： H04L25/02
CPC分类号： H04L25/0236 , H04L5/0007 , H04L5/0048 , H04L5/023 , H04L25/0248 , H04L27/2647
摘要： Estimation of channel characteristics and interference level in a time-varying multi-carrier multi-user systems is carried out concurrently. To perform the estimation, a multitude of data symbols and dedicated pilot symbols are transmitted over the channel. Next, an initial estimate value is selected for the interference level. The initial estimate value for the interference level is used together with the received pilot symbols to provide a first estimate of the channel. The first estimate of the channel is used to determine a new updated value for the interference level, which in turn, is used to update the value of the first estimate of the channel iteratively. The iterations continue until the iteratively updated values of the interference level and channel satisfy predefined limits. The data symbols and the final updated value of the channel are subsequently used to proviEstimation of channel characteristics and interference level in a time-varying multi-carrier multi-user systems is carried out concurrently. To perform the estimation, a multitude of data symbols and dedicated pilot symbols are transmitted over the channel. Next, an initial estimate value is selected for the interference level. The initial estimate value for the interference level is used together with the received pilot symbols to provide a first estimate of the channel. The first estimate of the channel is used to determine a new updated value for the interference level, which in turn, is used to update the value of the first estimate of the channel iteratively. The iterations continue until the iteratively updated values of the interference level and channel satisfy predefined limits. The data symbols and the final updated value of the channel are subsequently used to provide a second estimate for the channel. A MMSE approach is followed where channel estimates and noise variance in an OFDM system are iteratively updted.
摘要翻译：并行执行时变多载波多用户系统中的信道特性和干扰电平的估计。为了执行估计，通过信道发送多个数据符号和专用导频符号。接下来，针对干扰电平选择初始估计值。干扰电平的初始估计值与接收到的导频符号一起使用以提供信道的第一估计。信道的第一估计用于确定用于干扰电平的新的更新值，其又用于迭代地更新信道的第一估计值。迭代继续，直到干扰电平和通道的迭代更新值满足预定义的限制。数据符号和信道的最终更新值随后用于提供信道特性，同时执行时变多载波多用户系统中的干扰电平。为了执行估计，通过信道发送多个数据符号和专用导频符号。接下来，针对干扰电平选择初始估计值。干扰电平的初始估计值与接收到的导频符号一起使用以提供信道的第一估计。信道的第一估计用于确定用于干扰电平的新的更新值，其又用于迭代地更新信道的第一估计值。迭代继续，直到干扰电平和通道的迭代更新值满足预定义的限制。随后使用数据符号和信道的最终更新值来提供信道的第二估计。遵循MMSE方法，其中OFDM系统中的信道估计和噪声方差被迭代地更新。

7. 发明申请

WO2007014175A1 SDMA FOR WCDMA WITH INCREASED CAPACITY BY USE OF MULTIPLE SCRAMBLING CODES 审中-公开
标题翻译：通过使用多个SCRAMBLING代码提高容量的WCDMA的SDMA
公开(公告)号：WO2007014175A1
公开(公告)日：2007-02-01
申请号：PCT/US2006/028730
申请日：2006-07-24
申请人： QUALCOMM INCORPORATED , SAMBHWANI, Sharad Deepak , GORE, Dhananjay Ashok , AGRAWAL, Avneesh , SUTIVONG, Arak , GOROKHOV, Alexei
发明人： SAMBHWANI, Sharad Deepak , GORE, Dhananjay Ashok , AGRAWAL, Avneesh , SUTIVONG, Arak , GOROKHOV, Alexei
IPC分类号： H04J13/00 , H04J11/00
CPC分类号： H04J13/0048 , H04J13/18
摘要： Systems and methodologies are described that facilitate increasing system capacity in a code-limited WCDMA (e.g., TDD, FDD, …) wireless communication environment. According to one aspect, a larger code space can be defined by introducing multiple code clusters within a sector, wherein each cluster has a unique scrambling code. Codes within a cluster can have orthogonal Walsh sequences that can be assigned to user devices to facilitate communicating over a wireless network and can overlap with codes in another cluster. The unique scrambling code assigned to each cluster can ensure that duplicate Walsh sequences in another cluster in the same sector appear as a pseudo-noise codes.
摘要翻译：描述了有助于在限制码的WCDMA（例如，TDD，FDD））无线通信环境中增加系统容量的系统和方法。根据一个方面，可以通过在扇区内引入多个码集来定义更大的码空间，其中每个群集具有唯一的扰码。群集内的代码可以具有可被分配给用户设备的正交沃尔什序列，以便于通过无线网络进行通信并且可以与另一个群集中的代码重叠。分配给每个簇的唯一扰码可以确保同一扇区中另一个簇中的重复沃尔什序列显示为伪噪声码。

8. 发明申请

WO2006124810A2 PILOT TRANSMISSION AND CHANNEL ESTIMATION WITH PILOT WEIGHTING 审中-公开
标题翻译：飞行员称重的飞行传输和通道估计
公开(公告)号：WO2006124810A2
公开(公告)日：2006-11-23
申请号：PCT/US2006/018789
申请日：2006-05-16
申请人： QUALCOMM INCORPORATED , GORE, Dhananjay Ashok , AGRAWAL, Avneesh
发明人： GORE, Dhananjay Ashok , AGRAWAL, Avneesh
IPC分类号： H04J11/00
CPC分类号： H04B1/69 , H04L5/0007 , H04L5/0048 , H04L25/0226 , H04L25/0232 , H04L27/2647
摘要： Techniques to perform channel estimation with pilot weighting are described. A receiver receives at least one transmission symbol for a pilot transmitted by a transmitter. Each transmission symbol may be generated with a single-carrier multiplexing scheme (e.g., IFDMA or LFDMA) or a multi-carrier multiplexing scheme (e.g., OFDMA). The receiver processes each received transmission symbol and obtains received pilot values. The receiver may derive an interference estimate based on the received pilot values and may estimate the reliability of the received pilot values based on the interference estimate. The receiver determines weights for the received pilot values based on the transmitted pilot values, the estimated reliability of the received pilot values, and/or other information. The receiver derives a channel estimate based on the received pilot values and the weights. The receiver then performs data detection (e.g., equalization) on received data values with the channel estimate.
摘要翻译：描述了使用导频加权来执行信道估计的技术。接收机接收由发射机发送的导频的至少一个传输符号。可以使用单载波复用方案（例如，IFDMA或LFDMA）或多载波复用方案（例如，OFDMA）生成每个传输符号。接收机处理每个接收的传输符号并获得接收到的导频值。接收机可以基于接收到的导频值导出干扰估计，并且可以基于干扰估计来估计接收到的导频值的可靠性。接收机基于发送的导频值，接收到的导频值的估计可靠性和/或其他信息来确定接收到的导频值的权重。接收器根据接收到的导频值和权重导出信道估计。然后，接收机对具有信道估计的接收数据值执行数据检测（例如，均衡）。

9. 发明申请

WO2005057870A1 MULTI-ANTENNA SYSTEM TO SIMULTANEOUS SUPPORT OF MISO AND MIMO RECEIVERS 审中-公开
标题翻译：多天线系统同时支持MISO和MIMO接收机
公开(公告)号：WO2005057870A1
公开(公告)日：2005-06-23
申请号：PCT/US2004/040429
申请日：2004-12-03
申请人： QUALCOMM INCORPORATED , GORE, Dhananjay, Ashok , AGRAWAL, Avneesh , KADOUS, Tamer
发明人： GORE, Dhananjay, Ashok , AGRAWAL, Avneesh , KADOUS, Tamer
IPC分类号： H04L25/02
CPC分类号： H04L25/0226 , H04B7/0452 , H04B7/0684 , H04L27/2613
摘要： Efficient pilot transmission schemes for multi-antenna communication systems are described. In general, MISO receivers prefer a pilot transmitted in one spatial direction, and MIMO receivers typically require a pilot transmitted in different spatial directions. In one pilot transmission scheme, a first set of T scaled pilot symbols is generated with a first training vector and transmitted (e.g., continuously) from T transmit antennas, where T > 1. If MIMO receiver(s) are to be supported by the system, then at least T-1 additional sets of T scaled pilot symbols are generated with at least T-1 additional training vectors and transmitted from the T transmit antennas. The training vectors are for different (e.g., orthogonal) spatial directions. Each MISO receiver can estimate its MISO channel based on the first set of scaled pilot symbols. Each MIMO receiver can estimate its MIMO channel based on the first and additional sets of scaled pilot symbols.
摘要翻译：描述了用于多天线通信系统的有效导频传输方案。通常，MISO接收机优选在一个空间方向上发送的导频，并且MIMO接收机通常需要在不同空间方向上发送的导频。在一个导频传输方案中，利用第一训练向量生成第一组T比例导频符号，并从T个发射天线发射（例如，连续地），其中T> 1。如果MIMO接收机将由系统，则至少T-1个额外的T比例导频符号集合至少产生T-1个附加训练向量并从T个发射天线发射。训练矢量用于不同的（例如正交的）空间方向。每个MISO接收机可以基于第一组缩放的导频符号来估计其MISO信道。每个MIMO接收机可以基于第一个和额外的缩放导频符号集来估计其MIMO信道。

10. 发明申请

WO2007051181A1 SDMA RESOURCE MANAGEMENT 审中-公开
标题翻译： SDMA资源管理
公开(公告)号：WO2007051181A1
公开(公告)日：2007-05-03
申请号：PCT/US2006/060327
申请日：2006-10-27
申请人： QUALCOMM INCORPORATED , JI, Tingfang , GORE, Dhananjay Ashok , GOROKHOV, Alexei , DONG, Min , AGRAWAL, Avneesh
发明人： JI, Tingfang , GORE, Dhananjay Ashok , GOROKHOV, Alexei , DONG, Min , AGRAWAL, Avneesh
IPC分类号： H04L27/26 , H04Q7/36
CPC分类号： H04W72/06 , H04B1/713 , H04B7/026 , H04L5/0023 , H04L5/0037 , H04L5/0044 , H04L5/023
摘要： A method for allocating resources in a wireless communications environment comprises receiving a mapping between a first hop-port and frequency range, and determining whether to map a second access terminal to a second hop-port that is mapped to at least the same frequency range during a substantially similar instance in time, the determination made as a function of characteristics relating to a first access terminal associated with the first hop-port. The method can further include determining that the first access terminal is a candidate for employing Space-Division Multiple Access (SDMA), and mapping the second-hop port and associating the second access terminal with the second hop-port when the second access terminal is also a candidate for employing SDMA.
摘要翻译：一种用于在无线通信环境中分配资源的方法包括：接收第一跳跃端口和频率范围之间的映射，以及确定是否将第二接入终端映射到映射到至少相同频率范围的第二跳频端口基本相似的时间实例，根据与与第一跳跃端口相关联的第一接入终端的特性的函数进行确定。该方法还可以包括确定第一接入终端是采用空分多址（SDMA）的候选者，并且当第二接入终端是第二接入终端时，映射第二跳端口并将第二接入终端与第二跳接口相关联也是采用SDMA的候选人。

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