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1. 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。

2. 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。

3. 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。

4. 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。

5. 发明申请

WO2006020020A1 MULTIPLE MODULATION SCHEMES IN SINGLE RATE LAYERING WIRELESS COMMUNICATION SYSTEMS 审中-公开
标题翻译：单速无线通信系统中的多种调制方案
公开(公告)号：WO2006020020A1
公开(公告)日：2006-02-23
申请号：PCT/US2005/025156
申请日：2005-07-15
申请人： QUALCOMM INCORPORATED , GOROKHOV, Alexei , AGRAWAL, Avneesh , GORE, Dhananjay Ashok , KADOUS, Tamer
发明人： GOROKHOV, Alexei , AGRAWAL, Avneesh , GORE, Dhananjay Ashok , KADOUS, Tamer
IPC分类号： H04L1/06
CPC分类号： H04L1/005 , H04L1/0003 , H04L1/0041 , H04L1/06
摘要： A MIMO communication system is adapted to encode multiple data streams at the same adaptable rate. Accordingly, the set of all possible modulation/rate combinations to all modulations with common rates is decreased thus resulting in the reduction of the number of possible packet formats carrying the data streams. Rate prediction is made more error-resilient, in part, due to the averaging over all information rates. Furthermore, the signaling overhead of the packets is reduced. Therefore, the tradeoff between the desired transmission rate granularity on the one hand, and robustness /signaling overhead on the other hand, is controlled by adjusting the coding rate.
摘要翻译： MIMO通信系统适于以相同的可适应速率对多个数据流进行编码。因此，对具有公共速率的所有调制的所有可能的调制/速率组合的集合被减少，从而导致承载数据流的可能分组格式的数量的减少。速率预测更具有弹性，部分原因是由于所有信息速率的平均值。此外，分组的信令开销减小。因此，通过调整编码率来控制一方面期望的传输速率粒度与鲁棒性/信令开销之间的权衡。

6. 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。

7. 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）。

8. 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。

9. 发明申请

WO2006019708A1 PILOT TRANSMISSION AND CHANNEL ESTIMATION FOR MULTIPLE TRANSMITTERS 审中-公开
标题翻译：多台发射机的导频传输和信道估计
公开(公告)号：WO2006019708A1
公开(公告)日：2006-02-23
申请号：PCT/US2005/024612
申请日：2005-07-11
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： H04L25/0204 , H04L25/0212 , H04L25/0226 , H04L27/261
摘要： Each transmitter is assigned a time-only pilot code, a frequency-only pilot code, or a time-frequency pilot code to use for pilot transmission. The pilot codes may be pseudo-random, orthogonal, and/or cyclic-shift codes. To obtain a channel estimate for a transmitter using a time-frequency pilot code composed of a time-only code and a frequency-only code, a receiver multiplies a set of received symbols for each symbol period with a set of code values for the frequency-only code to obtain a set of detected symbols and performs an IDFT on the set of detected symbols to obtain an initial impulse response estimate. The receiver performs code matching on multiple initial impulse response estimates derived for multiple symbol periods with the time-only code to obtain a final impulse response estimate for the desired transmitter. The receiver retains the first L channel taps and zeroes out remaining channel taps, where L is the expected channel length.
摘要翻译：为每个发射机分配一个仅时间导频码，仅频率导频码或用于导频传输的时频导频码。导频码可以是伪随机，正交和/或循环移位码。为了使用由时间唯一码和仅频率码构成的时频导频码来获得用于发射机的信道估计，接收机将用于每个符号周期的一组接收符号与频率的一组码值相乘 - 获得一组检测符号的代码，并对检测符号集合执行IDFT以获得初始脉冲响应估计。接收机对具有多个符号周期的多个初始脉冲响应估计执行码匹配，其中仅使用时间码来获得所需发射机的最终脉冲响应估计。接收器保留第一个L个通道抽头，并将剩余的通道抽头置零，其中L是预期的通道长度。

10. 发明申请

WO2005074155A1 INTERFERENCE ESTIMATION IN A WIRELESS COMMUNICATION SYSTEM 审中-公开
标题翻译：无线通信系统干扰估计
公开(公告)号：WO2005074155A1
公开(公告)日：2005-08-11
申请号：PCT/US2005/002308
申请日：2005-01-24
申请人： QUALCOMM Incorporated , GORE, Dhananjay Ashok , AGRAWAL, Avneesh , KEERTHI, Arvind Vijay
发明人： GORE, Dhananjay Ashok , AGRAWAL, Avneesh , KEERTHI, Arvind Vijay
IPC分类号： H04B1/713
CPC分类号： H04B1/7143 , H04B1/715 , H04B2001/7154 , H04L5/023 , H04W52/38 , H04W52/42 , H04W52/44
摘要： Interference may be controlled by selectively blanking or attenuating transmit powers. A method of estimating interference caused by a transmitting entity in a wireless communication system comprises determining a desired level of accuracy in an interference estimate, determining a required number of blanks per subband set to achieve the desired level of accuracy, inserting the required number of blanks per subband set into a frequency hopping (FH) sequence, and transmitting according to the FH sequence.
摘要翻译：可以通过选择性地消隐或衰减发射功率来控制干扰。一种在无线通信系统中估计由发射实体引起的干扰的方法包括：确定干扰估计中所需的准确度水平，确定每个子带集所需的空白数以达到期望的准确度，插入所需数量的空白每个子带设置成跳频（FH）序列，并根据FH序列进行发送。

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