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1. 发明申请

WO2006070270A1 METHOD AND APPARATUS FOR ESTIMATING TRANSMIT WEIGHTS FOR MULTIPLE ANTENNAS 审中-公开
标题翻译：用于估计多个天线的发射权重的方法和装置
公开(公告)号：WO2006070270A1
公开(公告)日：2006-07-06
申请号：PCT/IB2005/003908
申请日：2005-12-30
申请人： NOKIA CORPORATION, , RAGHOTHAMAN, Balaji , ZHANG, Jianzhong , WANG, Yan , LAMPINEN, Marko
发明人： RAGHOTHAMAN, Balaji , ZHANG, Jianzhong , WANG, Yan , LAMPINEN, Marko
IPC分类号： H04B7/08 , H04B7/06
CPC分类号： H04B7/0413 , H04B7/0854
摘要： An approach for determining antenna weights in a multiple antenna communication system is provided. The approach jointly optimizes the transmitter weights and the receiver filter. A filter of a receiver (e.g., Linear Minimum Mean Square Error (LMMSE)) is optimized using initial weight values of the transmit antennas. The cost function, which is a mean-squared of a difference between a transmitted signal and an estimated signal, is then modified according to the optimized receiver filter. A transmit filter is then optimized according to the modified cost function. The above approach advantageously can obtain antenna weights when the condition of separability of paths does not exist.
摘要翻译：提供了一种用于确定多天线通信系统中的天线权重的方法。该方法联合优化发射机权重和接收机滤波器。使用发射天线的初始权重值来优化接收机的滤波器（例如，线性最小均方误差（LMMSE））。然后根据优化的接收机滤波器修改作为发送信号和估计信号之间的差的平均值的成本函数。然后根据修改的成本函数优化发送过滤器。当不存在路径的可分离性条件时，上述方法有利地可以获得天线权重。

2. 发明申请

WO2006008622A1 METHOD AND DETECTOR FOR A NOVEL CHANNEL QUALITY INDICATOR FOR SPACE-TIME ENCODED MIMO SPREAD SPECTRUM SYSTEMS IN FREQUENCY SELECTIVE CHANNELS 审中-公开
标题翻译：用于空时编码MIMO扩频系统频率选择性信道的新型信道质量指示器的方法和检测器
公开(公告)号：WO2006008622A1
公开(公告)日：2006-01-26
申请号：PCT/IB2005/001985
申请日：2005-07-12
申请人： NOKIA CORPORATION , NOKIA, INC. , ZHANG, Jianzhong , RAGHOTHAMAN, Balaji , WANG, Yan , MANDYAM, Giridhar
发明人： ZHANG, Jianzhong , RAGHOTHAMAN, Balaji , WANG, Yan , MANDYAM, Giridhar
IPC分类号： H04L1/00
CPC分类号： H04L1/0656 , H04B1/7105 , H04B1/71055 , H04L1/0026 , H04L1/20 , H04L2025/03426 , H04L2025/03617
摘要： In a jointly encoded (JE), spread spectrum communication MIMO system where a demultiplexed packet is transmitted over multiple streams, two versions of a single channel quality indicator (CQI) is disclosed: generalized SNR or constrained mutual information CMI between the transmitted and receives chip vectors. In the receiver, the CMI is constrained so that filtering is suboptimal. The filter bank is preferably LMMSE or MVDR filters that convert the multi-path channel into a single patch channel so that joint sequence detection is unnecessary. Detection is instead by a per-Walsh code architecture, wherein a plurality of Walsh-code specific detectors in parallel detect bits or symbols from the single-channel chips after downconverting chip to symbols. Link to systen t mapping is realizable using the disclosed CQI for a JE MIMO system in that the CQI or related information is returned to the transmitter, which adapts coding rate and/or modulation for the charnel as represented by the CQI.
摘要翻译：在其中解复用的分组在多个流上传输的联合编码（JE）扩频通信MIMO系统中，公开了单信道质量指示符（CQI）的两个版本：通用SNR或受约束的相互发送和接收码片矢量之间的信息CMI。在接收器中，CMI受到限制，因此过滤不理想。滤波器组优选为LMMSE或MVDR滤波器，其将多路径信道转换为单个补丁信道，从而不需要联合序列检测。检测取而代之的是每沃尔什码体系结构，其中多个并行沃尔什码检测器在将码片下变频为码元之后检测来自单信道码片的比特或码元。使用所公开的用于JE MIMO系统的CQI可以实现到系统映射的链接，因为CQI或相关信息被返回到发射机，其适应由CQI表示的用于信道的编码速率和/或调制。

3. 发明申请

WO2005050886A2 FLEXIBLE RATE SPLIT METHOD FOR MIMO TRANSMISSION 审中-公开
标题翻译：用于MIMO传输的灵活速率分离方法
公开(公告)号：WO2005050886A2
公开(公告)日：2005-06-02
申请号：PCT/IB2004/003732
申请日：2004-11-15
申请人： NOKIA CORPORATION , NOKIA, INC. , RAGHOTHAMAN, Balaji , ZHANG, Jianzhong
发明人： RAGHOTHAMAN, Balaji , ZHANG, Jianzhong
IPC分类号： H04L
CPC分类号： H04B7/0417 , H04B7/0443 , H04B7/0465 , H04B7/0632 , H04B7/0669 , H04B7/0697 , H04L1/0002 , H04L1/0007 , H04L1/0033 , H04L1/0041 , H04L1/0065 , H04L1/0071 , H04L1/06 , H04L1/0656
摘要： A method for transmitting a packet of N input bits includes encoding all of the N bits as a single entity, such as with an interleaver of length N within a turbo coder, outputting M encoded bits, channel interleaving the M bits, splitting the M encoded bits into a parallel first and second portion, and transmitting them over separate channels to achieve spatial diversity. The size of the first and second portion is determined based on a closed feedback loop that provides some knowledge of the channel, preferably a measure of channel capacity. The feedback loop may also provide channel knowledge to a subpacket selector associated with each transmit antenna, which determines an appropriate rate for that channel and selects subpackets to fill a transmission packet for that channel. The subpacket selectors choose a subpacket of systematic bits and fill the remaining transmission packet size with subpackets of parity bits. Eigenvectors maybe employed to transmit each transmission packet over more than one channel with a power disparity between the channels. A transmitter according to the present invention is also described.
摘要翻译：用于发送N个输入比特的分组的方法包括将所有N比特全部编码为单个实体，例如在Turbo编码器内具有长度为N的交织器，输出M个编码比特，对M个比特进行信道交织，位到并行的第一和第二部分，并且通过单独的信道发送它们以实现空间分集。第一和第二部分的大小基于提供信道的一些知识的闭合反馈回路来确定，优选地是信道容量的度量。反馈回路还可以向与每个发射天线相关联的子分组选择器提供信道知识，其确定该信道的适当速率并选择子分组以填充该信道的传输分组。子分组选择器选择系统比特的子分组，并用奇偶校验位的子分组填充剩余的传输分组大小。可以使用特征向量在多个信道上以每个信道之间的功率差异来传输每个传输分组。还描述了根据本发明的发射机。

4. 发明申请

WO2005086500A1 CONSTRAINED OPTIMIZATION BASED MIMO LMMSE-SIC RECEIVER FOR CDMA DOWNLINK 审中-公开
标题翻译：用于CDMA下行链路的基于约束优化的MIMO LMMSE-SIC接收机
公开(公告)号：WO2005086500A1
公开(公告)日：2005-09-15
申请号：PCT/US2005/006132
申请日：2005-02-23
申请人： NOKIA CORPORATION , NOKIA, INC. , ZHANG, Jianzhong , RAGHOTHAMAN, Balaji , MANDYAM, Giridhar
发明人： ZHANG, Jianzhong , RAGHOTHAMAN, Balaji , MANDYAM, Giridhar
IPC分类号： H04Q7/00
CPC分类号： H04L25/03292 , H04L1/0631 , H04L1/0656
摘要： A system according to embodiments of this invention provide a multiple transmit antenna (117-1..M), multiple receive antenna (121-1..N) (MIMO) receiver (125) design for the communication downlinks such as those used in CDMA technology. Two algorithms referred to as the MIMO LMMSE-FFT and MIMO LMMSE-SIC (Successive Interference Cancellation) algorithms, are described in detail. In embodiments of the invention, the interference cancellation step is achieved without the impractical assumption of the knowledge of all the active Walsh codes in the systems, unlike many other interference cancellation based algorithms found in the literature.
摘要翻译：根据本发明的实施例的系统提供用于通信下行链路的多发射天线（117-1..M），多个接收天线（121-1..N）（MIMO）接收机（125）设计，诸如在 CDMA技术。被称为MIMO LMMSE-FFT和MIMO LMMSE-SIC（连续干扰消除）算法的两种算法被详细描述。在本发明的实施例中，与在文献中发现的许多其他基于干扰消除的算法不同，实现了干扰消除步骤，而不需要系统中所有活动沃尔什码的知识的不切实际的假设。

5. 发明申请

WO2007103108A2 ADAPTIVE MULTI-BEAMFORMING SYSTEMS AND METHODS FOR COMMUNICATION SYSTEMS 审中-公开
标题翻译：通信系统的自适应多波束形成系统和方法
公开(公告)号：WO2007103108A2
公开(公告)日：2007-09-13
申请号：PCT/US2007/005259
申请日：2007-03-02
申请人： NOKIA CORPORATION , NGUYEN, Hoang , RAGHOTHAMAN, Balaji
发明人： NGUYEN, Hoang , RAGHOTHAMAN, Balaji
IPC分类号： H04B7/06
CPC分类号： H04B7/0639 , H01Q1/246 , H01Q3/2605 , H04B7/0617 , H04B7/0634
摘要： A wireless communication system including receiving and base stations. The receiving station (570) includes a detector (590) that measures a downlink channel correlation matrix for multiple antennas (547) of a base station (500). The detector (590) computes an antenna weight increment vector normal to an antenna weight vector for multiple beams from the multiple antennas (547) of the base station (500). The detector (590) quantizes the antenna weight increment vectors to produce a respective quantized antenna weight increment vector. The receiving station (570) includes a transmitter (580) that sends the quantized antenna weight increment vectors to the base station (500). The base station (500) includes a beamformer selector (565) that receives from the receiving station (570) and re-orthogonalizes the quantized antenna weight increment vector for each of the multiple beams. The base station (500) includes a weight vector modifier (567) that modifies the antenna weight vector for the multiple beams by adding an increment proportional to the respective re-orthogonalized quantized antenna weight increment vector.
摘要翻译：包括接收站和基站的无线通信系统。接收站（570）包括测量基站（500）的多个天线（547）的下行链路信道相关矩阵的检测器（590）。检测器（590）计算与来自基站（500）的多个天线（547）的多个波束的天线权重矢量垂直的天线权重增量矢量。检测器（590）量化天线权重增量矢量以产生相应的量化天线权重增量矢量。接收站（570）包括将量化的天线权重增量矢量发送到基站（500）的发射机（580）。基站（500）包括波束形成器选择器（565），其从接收站（570）接收并且针对多个波束中的每一个重新正交化量化的天线权重增量矢量。基站（500）包括权重矢量修改器（567），其通过将与各个重新正交化的量化天线权重增量矢量成比例的增量相加来修改多个波束的天线权重矢量。

6. 发明申请

WO2007020512A2 METHOD, SYSTEM, APPARATUS AND COMPUTER PROGRAM PRODUCT FOR PLACING PILOTS IN A MULTICARRIER MIMO SYSTEM 审中-公开
标题翻译：方法，系统，装置和计算机程序产品，用于在多功能MIMO系统中配置PILOTS
公开(公告)号：WO2007020512A2
公开(公告)日：2007-02-22
申请号：PCT/IB2006/002210
申请日：2006-08-11
申请人： NOKIA CORPORATION , IONESCU, Dumitru, Mihai , RAGHOTHAMAN, Balaji
发明人： IONESCU, Dumitru, Mihai , RAGHOTHAMAN, Balaji
IPC分类号： H04L27/26
CPC分类号： H04L5/0048 , H04B7/04 , H04L5/0023 , H04L25/0204 , H04L25/0226 , H04L25/0232 , H04L25/03828 , H04L27/2604 , H04L27/2655 , H04L27/2657 , H04L27/2662
摘要： A method, system, apparatus and computer program product are provided for placing pilot symbols in an OFDM system using sets of multidimensional points having a structure that is derived from discernible expansions of generalized orthogonal designs. These sets of multidimensional points may be used to form pilot symbols on a two-dimensional frequency-time pilot symbol grid for sampling the flat fading process on various subcarriers of an OFDM MIMO system, transmit antennas, and OFDM symbols. The pilot information associated with the pilot symbols may be used to perform initial carrier synchronization and OFDM symbol timing while discerning between candidate base stations.
摘要翻译：提供了一种方法，系统，装置和计算机程序产品，用于在OFDM系统中使用具有从广义正交设计的可辨识的扩展导出的结构的多维点集合来放置导频符号。这些多维点集合可以用于在二维频率 - 时间导频符号网格上形成用于对OFDM MIMO系统，发射天线和OFDM符号的各个子载波上的平坦衰落过程进行采样的导频符号。与导频符号相关联的导频信息可以用于在候选基站之间进行识别时执行初始载波同步和OFDM符号定时。

7. 发明申请

WO2006070250A1 METHOD AND APPARATUS FOR PROVIDING AN EFFICIENT PILOT SCHEME FOR CHANNEL ESTIMATION 审中-公开
标题翻译：用于提供频道估计的有效导频方案的方法和装置
公开(公告)号：WO2006070250A1
公开(公告)日：2006-07-06
申请号：PCT/IB2005/003864
申请日：2005-12-22
申请人： NOKIA CORPORATION , MANDYAM, Giridhar, D. , RAGHOTHAMAN, Balaji , DERRYBERRY, Roy, Thomas
发明人： MANDYAM, Giridhar, D. , RAGHOTHAMAN, Balaji , DERRYBERRY, Roy, Thomas
IPC分类号： H04L25/02 , H04B1/707 , H04L27/26
CPC分类号： H04B1/707 , H04B2201/70701
摘要： An approach for utilizing a pilot scheme in a spread spectrum communication system (e.g., Multi Carrier Code Division Multiple Access (MC-CDMA)) is provided. A communications link includes a sub-bands and a single pilot channel that is designated for the sub-bands for channel estimation. Pilot symbols transmitted over the single pilot channel are used to determine a first channel estimate associated with a first one of the sub-bands, and a second channel estimate corresponding to a second one of the sub-bands is derived from the first channel estimate.
摘要翻译：提供了在扩频通信系统（例如，多载波码分多址（MC-CDMA））中利用导频方案的方法。通信链路包括被指定用于信道估计的子带的子带和单个导频信道。通过单个导频信道发送的导频符号用于确定与子频带中的第一个频带相关联的第一信道估计，并且从第一信道估计导出对应于第二子频带的第二信道估计。

8. 发明申请

WO2003098823A1 APPARATUS, AND ASSOCIATED METHOD, FOR FACILITATING ANTENNA WEIGHT SELECTION UTILIZING DETERMINISTIC PERTURBATION GRADIENT APPROXIMATION 审中-公开
标题翻译：装置和相关方法，用于促进使用决定性刺激梯度近似的天线重量选择
公开(公告)号：WO2003098823A1
公开(公告)日：2003-11-27
申请号：PCT/US2003/015228
申请日：2003-05-15
申请人： NOKIA CORPORATION , RAGHOTHAMAN, Balaji , DERRYBERRY, Thomas, R.
发明人： RAGHOTHAMAN, Balaji , DERRYBERRY, Thomas, R.
IPC分类号： H04B1/38
CPC分类号： H04B7/0634 , H04B7/022 , H04B7/0641
摘要： Apparatus, and an associated method, for facilitating selection of optimal antenna weightings by which to weight signals sent in a communication system that utilizes closed-loop transmit diversity. A deterministic perturbation gradient approximation technique is utilized in which perturbation vectors are selected (136) by a selector and applied, by an applicator, to antenna weighting elements. A selected set of perturbation vectors are applied to the antenna weighting elements in both a positive direction and a negative direction (138). A detector at a receiving station measures in disassociated with the signals communicated thereto, once weighted with the perturbation vectors. A single-bit feedback value is returned to the sending station, and the antenna weightings are appropriately adjusted (142). The technique is utilized during both non-handoff conditions and during handoff conditions.
摘要翻译：装置和相关联的方法，用于促进选择最优天线权重，通过该权重对在利用闭环发射分集的通信系统中发送的信号进行加权。使用确定性扰动梯度近似技术，其中通过选择器选择扰动矢量（136）并通过施加器施加到天线加权元件。所选择的一组扰动矢量在正方向和负方向上被施加到天线加权元件（138）。接收站的检测器测量一次用扰动向量加权后与传送给其的信号分离。单位反馈值返回给发送站，天线权重被适当地调整（142）。该技术在非切换条件和切换条件期间都被利用。

9. 发明申请

WO2007095305A1 QUANTIZED-FEEDBACK OPTIMAL ADAPTIVE BEAMFORMING 审中-公开
标题翻译：量化反馈优化自适应光束
公开(公告)号：WO2007095305A1
公开(公告)日：2007-08-23
申请号：PCT/US2007/003943
申请日：2007-02-13
申请人： NOKIA CORPORATION , NGUYEN, Hoang , RAGHOTHAMAN, Balaji
发明人： NGUYEN, Hoang , RAGHOTHAMAN, Balaji
IPC分类号： H04B7/06
CPC分类号： H04B7/0641 , H01Q1/1257 , H01Q3/2605 , H01Q3/2611 , H04B7/0417 , H04B7/0634 , H04B7/0639 , H04W24/00 , H04W88/08
摘要： A wireless communication system including receiving and base stations (370, 300). The receiving station (370) includes a detector (390) that measures a downlink channel correlation matrix for multiple antennas (347) of the base station (300), computes an antenna weight increment vector normal to a previous antenna weight vector rendering positive a directional derivative of total received power from the multiple antennas (347) of the base station (300), and quantizes the antenna weight increment vector to produce a quantized antenna weight increment vector. The receiving station (370) also includes a transmitter (380) that sends the quantized antenna weight increment vector to the base station (300). The base station (300) includes a beamformer selector (365) that re-orthogonalizes the quantized antenna weight increment vector, and a weight vector modifier (367) that calculates an antenna weight vector by adding an increment to the previous antenna weight vector proportional to the re-orthogonalized quantized antenna weight increment vector and renormalizes the antenna weight vector to unit length.
摘要翻译：一种包括接收和基站（370,300）的无线通信系统。接收站（370）包括测量基站（300）的多个天线（347）的下行链路信道相关矩阵的检测器（390），计算与前一个天线权重向量法线的天线权重增量向量，其呈现为正方向从基站（300）的多个天线（347）获得的总接收功率的导数，并且量化天线加权增量向量以产生量化的天线加权增量向量。接收站（370）还包括将量化的天线加权增量向量发送到基站（300）的发射机（380）。基站（300）包括使量化的天线加权增量向量重新正交化的波束形成器选择器（365）和通过将与先前的天线权重向量成比例的增量相加来计算天线权重向量的权重向量修改器（367）重新正交量化天线权重增量向量并将天线权重向量重新归一化为单位长度。

10. 发明申请

WO2007077476A1 METHOD AND APPARATUS FOR PROVIDING A LINK ADAPTATION SCHEME FOR A WIRELESS COMMUNICATION SYSTEM 审中-公开
标题翻译：提供无线通信系统的链路自适应方案的方法和装置
公开(公告)号：WO2007077476A1
公开(公告)日：2007-07-12
申请号：PCT/IB2006/001385
申请日：2006-05-26
申请人： NOKIA CORPORATION , PI, Zhouyue , RAGHOTHAMAN, Balaji
发明人： PI, Zhouyue , RAGHOTHAMAN, Balaji
IPC分类号： H04L1/18 , H04L1/00
CPC分类号： H04L1/1887 , H04L1/0017 , H04L1/1607 , H04L1/1812 , H04L1/1819 , H04L1/1822 , H04L27/2601 , H04L2001/0098
摘要： An approach is provided for error correction in a multi-carrier wireless network or an Orthogonal Frequency Division Multiplexing (OFDM) network. A first rate is assigned to a first error correction channel. A second rate is assigned to a second error correction channel, wherein the first rate is different from the second rate.
摘要翻译：提供了一种用于多载波无线网络或正交频分复用（OFDM）网络中的纠错的方法。第一速率被分配给第一纠错信道。第二速率被分配给第二纠错信道，其中第一速率与第二速率不同。

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