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1. 发明授权

US07251768B2 Wireless communication system having error-control coder and linear precoder 有权
标题翻译：具有误差控制编码器和线性预编码器的无线通信系统
公开(公告)号：US07251768B2
公开(公告)日：2007-07-31
申请号：US10420361
申请日：2003-04-21
申请人： Georgios B. Giannakis , Zhengdao Wang , Shengli Zhou
发明人： Georgios B. Giannakis , Zhengdao Wang , Shengli Zhou
IPC分类号： H03M13/29 , H03M13/45
CPC分类号： H04L1/005 , H03M13/29 , H03M13/2948 , H03M13/2957 , H03M13/6513 , H04L1/0055 , H04L1/0071 , H04L1/04
摘要： In general, joint error-control coding and linear precoding techniques are proposed for fading-resilient transmissions over frequency- at and frequency-selective fading channels encountered with high-rate wireless OFDM transmissions. For example, a wireless communication system includes a transmitter that applies non-linear codes and a linear precoder to a data stream to produce a joint coded-precoded waveform. A receiver receives the joint coded-precoded waveform from the transmitter via a wireless communication channel, and demodulates the joint-coded precoded waveform to produce estimated data. The combination offers a multiplicative benefit to the diversity achievable by the wireless communication system.
摘要翻译：通常，针对在高速率无线OFDM传输中遇到的频率和频率选择性衰落信道的衰落弹性传输，提出了联合误差控制编码和线性预编码技术。例如，无线通信系统包括将非线性码和线性预编码器应用于数据流以产生联合编码预编码波形的发射机。接收机通过无线通信信道从发射机接收联合编码预编码的波形，并解调联合编码的预编码波形以产生估计数据。该组合为无线通信系统可实现的分集带来乘法优势。

2. 发明授权

US07522673B2 Space-time coding using estimated channel information 有权
标题翻译：使用估计的信道信息进行时空编码
公开(公告)号：US07522673B2
公开(公告)日：2009-04-21
申请号：US10420351
申请日：2003-04-21
申请人： Georgios B. Giannakis , Shengli Zhou
发明人： Georgios B. Giannakis , Shengli Zhou
IPC分类号： H04B7/02
CPC分类号： H03M13/6337 , H03M13/29 , H04B7/0426 , H04B7/0465 , H04L1/0055 , H04L1/04 , H04L1/0618 , H04L25/0204 , H04W52/42
摘要： The invention is directed to techniques for space-time coding in a wireless communication system in which the transmitter makes use of multiple transmit antennas. The transmitter uses channel information estimated by a receiving device and returned to the transmitter, e.g., as feedback. In one exemplary embodiment, the transmitter receives a mean feedback information that defines a mean channel value associated with the different channels of the different antennas. In another exemplary embodiment, the transmitter receives covariance feedback, e.g., statistical values associated with each of the different channels.
摘要翻译：本发明涉及无线通信系统中的时空编码技术，其中发射机利用多个发射天线。发射机使用由接收设备估计的信道信息并返回到发射机，例如作为反馈。在一个示例性实施例中，发射机接收定义与不同天线的不同信道相关联的平均信道值的平均反馈信息。在另一示例性实施例中，发射机接收协方差反馈，例如与不同信道中的每一个相关联的统计值。

3. 发明授权

US07403509B2 Receiver for chip-interleaved block-spread multi-user communication systems 有权
标题翻译：用于芯片交错块扩展多用户通信系统的接收器
公开(公告)号：US07403509B2
公开(公告)日：2008-07-22
申请号：US10841806
申请日：2004-05-07
申请人： Georgios B. Giannakis , Shengli Zhou
发明人： Georgios B. Giannakis , Shengli Zhou
IPC分类号： H04B7/16
CPC分类号： H04B1/7105 , H04L25/03012 , H04L2025/03375 , H04L2025/03605
摘要： Techniques are described for performing block equalization on a received wireless communication signal formed according to interleaved chips generated from sub-blocks of symbols. For example, a one-step block equalization process is described which produces estimates of the information-bearing symbols from a wireless communication signal received from two or more transmitters in a soft handoff environment. The techniques provide improved performance in high load, soft handoff environments with low complexity, highly flexible equalization. The wireless communication signal may be a CIBS-CDMA signal in which a symbol block is divided into sub-blocks and spread by a user-specific block-spreading matrix. The CIBS signal is received through M subchannels and a de-spreading matrix is applied to produce a multi-user interference (MUI) free sub-block output for the mth channel. One-step block equalization comprises forming a single block from the m de-spread sub-blocks and performing block equalization on the single block.
摘要翻译：描述了对根据从符号子块生成的交织的码片形成的接收的无线通信信号执行块均衡的技术。例如，描述了从在软切换环境中从两个或更多个发射机接收的无线通信信号产生信息承载符号的估计的一步块均衡处理。这些技术在高负载，软切换环境中提供了改进的性能，具有低复杂度，高度灵活的均衡。无线通信信号可以是CIBS-CDMA信号，其中符号块被划分成子块并由用户特定的块扩展矩阵扩展。通过M个子信道接收CIBS信号，并且应用去扩展矩阵以产生用于第m个/第二信道的多用户干扰（MUI）空闲子块输出。一步块均衡包括从m个解扩子块形成单个块，并在单个块上执行块均衡。

4. 发明授权

US07190734B2 Space-time coded transmissions within a wireless communication network 有权
标题翻译：无线通信网络内的时空编码传输
公开(公告)号：US07190734B2
公开(公告)日：2007-03-13
申请号：US10158390
申请日：2002-05-28
申请人： Georgios B. Giannakis , Shengli Zhou
发明人： Georgios B. Giannakis , Shengli Zhou
IPC分类号： H04B7/02 , H04B7/06
CPC分类号： H04L27/2607 , H04L1/0618 , H04L5/0023 , H04L5/0048
摘要： Techniques are described for space-time block coding for single-carrier block transmissions over frequency selective multipath fading channels. Techniques are described that achieve a maximum diversity of order NtNr(L+1) in rich scattering environments, where Nt(Nr) is the number of transmit (receive) antennas, and L is the order of the finite impulse response (FIR) channels. The techniques may include parsing a stream of information-bearing symbols to form blocks of K symbols, precoding the symbols to form blocks having J symbols, and collecting consecutive NS blocks. The techniques may further include applying a permutation matrix to the NS blocks, generating a space-time block coded matrix having Nt rows that are communicated through a wireless communication medium. The receiver complexity is comparable to single antenna transmissions, and the exact Viterbi's algorithm can be applied for maximum-likelihood (ML) optimal decoding.
摘要翻译：描述了用于通过频率选择性多径衰落信道进行单载波块传输的时空块编码的技术。描述了在富散射环境中达到N N（N + 1）N（N + 1）的最大分集的技术，其中N N（N 发射（接收）天线的数量，L是有限脉冲响应（FIR）信道的顺序。这些技术可以包括解析携带信息的符号流以形成K个符号的块，对符号进行预编码以形成具有J个符号的块，以及收集连续的N个块。这些技术可以进一步包括将置换矩阵应用于N N个块，产生具有通过无线通信介质传送的N T行的时空块编码矩阵。接收机复杂度与单天线传输相当，并且可以将精确的维特比算法应用于最大似然（ML）最优解码。

5. 发明授权

US07672384B2 Bandwidth and power efficient multicarrier multiple access 有权
标题翻译：带宽和功率效率的多载波多路访问
公开(公告)号：US07672384B2
公开(公告)日：2010-03-02
申请号：US11070855
申请日：2005-03-02
申请人： Georgios B. Giannakis , Shengli Zhou , Pengfei Xia
发明人： Georgios B. Giannakis , Shengli Zhou , Pengfei Xia
IPC分类号： H04K1/10
CPC分类号： H04L5/023
摘要： Techniques are described for multicarrier multiple access wireless transmission, e.g. orthogonal frequency-division multiple access (OFDMA) transmissions, over frequency selective fading channels. The techniques are designed to maintain constant modulus transmissions for uplink while effectively mitigating intersymbol interference. Specifically, the techniques utilize non-redundant unitary precoding across OFDMA subcarriers to maintain constant modulus transmissions for uplink communications. For example, the techniques involve precoding a block of information symbols and assigning a different subcarrier for each symbol of the block. The subcarriers are selected to be equi-spaced and may be selected, for example, from a phase-shift keying constellation. The number of symbols per block is equal to the number of subcarriers assigned per user. Importantly, even with multiple subcarriers per user, the techniques enable constant modulus transmissions for uplink. Consequently, the techniques may achieve high power and bandwidth efficiency as well as improved performance over conventional OFDMA and GMC-CDMA transmissions.
摘要翻译：描述了用于多载波多址无线传输的技术，例如。正交频分多址（OFDMA）传输，频率选择性衰落信道。这些技术被设计为保持上行链路的恒定模数传输，同时有效地减轻符号间干扰。具体地说，这些技术利用跨OFDMA子载波的非冗余单一预编码来维持用于上行链路通信的恒模传输。例如，这些技术涉及对信息符号块进行预编码并为块的每个符号分配不同的子载波。子载波被选择为等间距，并且可以例如从相移键控星座中选择。每个块的符号数等于每个用户分配的子载波数。重要的是，即使每个用户有多个子载波，这些技术也可以实现上行链路的恒定模数传输。因此，与传统的OFDMA和GMC-CDMA传输相比，这些技术可以实现高功率和带宽效率以及改进的性能。

6. 发明授权

US07609782B2 Space-time coded transmissions within a wireless communication network 有权
标题翻译：无线通信网络内的时空编码传输
公开(公告)号：US07609782B2
公开(公告)日：2009-10-27
申请号：US11682664
申请日：2007-03-06
申请人： Georgios B. Giannakis , Shengli Zhou
发明人： Georgios B. Giannakis , Shengli Zhou
IPC分类号： H04B7/06 , H04B7/02
CPC分类号： H04L27/2607 , H04L1/0618 , H04L5/0023 , H04L5/0048
摘要： Techniques are described for space-time block coding for single-carrier block transmissions over frequency selective multipath fading channels. Techniques are described that achieve a maximum diversity of order NtNr (L+1) in rich scattering environments, where Nt (Nr) is the number of transmit (receive) antennas, and L is the order of the finite impulse response (FIR) channels. The techniques may include parsing a stream of information-bearing symbols to form blocks of K symbols, precoding the symbols to form blocks having J symbols, and collecting consecutive Ns blocks. The techniques may further include applying a permutation matrix to the Ns blocks, generating a space-time block coded matrix having Nt rows that are communicated through a wireless communication medium. The receiver complexity is comparable to single antenna transmissions, and the exact Viterbi's algorithm can be applied for maximum-likelihood (ML) optimal decoding.
摘要翻译：描述了用于通过频率选择性多径衰落信道进行单载波块传输的时空块编码的技术。描述了在富散射环境中实现NtNr（L + 1）的最大分集的技术，其中Nt（Nr）是发射（接收）天线的数量，并且L是有限脉冲响应（FIR）信道的阶数。这些技术可以包括解析携带信息的符号流以形成K个符号的块，对符号进行预编码以形成具有J个符号的块，以及收集连续的N个块。这些技术可以进一步包括将置换矩阵应用于Ns块，产生具有通过无线通信介质传送的Nt个行的时空块编码矩阵。接收机复杂度与单天线传输相当，并且可以将精确的维特比算法应用于最大似然（ML）最优解码。

7. 发明授权

US07139321B2 Channel estimation for wireless OFDM systems 有权
公开(公告)号：US07139321B2
公开(公告)日：2006-11-21
申请号：US10094946
申请日：2002-03-07
申请人： Georgios B. Giannakis , Shengli Zhou
发明人： Georgios B. Giannakis , Shengli Zhou
IPC分类号： H04K1/10
CPC分类号： H04L25/022 , H04L25/0238 , H04L27/2647
摘要： Techniques are described for efficiently estimating and compensating for the effects of a communication channel in a multi-carrier wireless communication system. The techniques exploit the fact that the transmitted symbols are drawn from a finite-alphabet to efficiently estimate the propagation channel for multi-carrier communication systems, such systems using OFDM modulation. A transmitter transmits data through a communication channel according to the modulation format. A receiver includes a demodulator to demodulate the data and an estimator to estimate the channel based on the demodulated data. The channel estimator applies a power-law operation to the demodulated data to identify the channel. The techniques can be used in both blind and semi-blind modes of channel estimation.

8. 发明授权

US06912241B2 Chip-interleaved, block-spread multi-user communication 有权
标题翻译：芯片交错，块传播多用户通信
公开(公告)号：US06912241B2
公开(公告)日：2005-06-28
申请号：US09838621
申请日：2001-04-19
申请人： Georgios B. Giannakis , Shengli Zhou
发明人： Georgios B. Giannakis , Shengli Zhou
IPC分类号： H04B1/7097 , H04J13/00 , H04K1/00 , H04B1/707
CPC分类号： H04J13/004 , H04B1/7097 , H04B2201/709709 , H04L1/0071
摘要： Techniques are described for maintaining the orthogonality of user waveforms in multi-user wireless communication systems, such as systems using the code division multiple access (CDMA) modulation scheme in the presence of frequency-selective fading channels. Unlike conventional systems in which spreading is performed on individual information-bearing symbols, the “chip-interleaved block-spreading” (CIBS) techniques described herein spread blocks of symbols. A transmitter includes a block-spreading unit to form a set of chips for each symbol of a block of information-bearing symbols and to produce a stream of chips in which the chips from different sets are interleaved. A pulse shaping unit within the transmitter generates a transmission signal from the stream of interleaved chips and transmits the signal through a communication channel. A receiver includes a block separator to de-interleave the chips, followed by a match filter to separate signals from different users, and followed by any single-user equalizer.
摘要翻译：描述了用于在多用户无线通信系统中维持用户波形的正交性的技术，例如在存在频率选择性衰落信道的情况下使用码分多址（CDMA）调制方案的系统。不同于在各个信息承载符号上进行扩展的传统系统，本文所述的“片外交错块扩展”（CIBS）技术扩展符号块。发射机包括块扩展单元，用于为信息载体符号块的每个符号形成一组码片，并产生其中来自不同组的码片交错的码片流。发射机内的脉冲整形单元产生来自交错芯片流的发送信号，并通过通信信道发送信号。接收机包括用于对芯片进行解交织的块分离器，随后是匹配滤波器以分离来自不同用户的信号，随后是任何单用户均衡器。

9. 发明授权

US07706454B2 Full-diversity, full-rate complex-field space-time coding for wireless communication 有权
标题翻译：用于无线通信的全分集，全速率复杂场时空编码
公开(公告)号：US07706454B2
公开(公告)日：2010-04-27
申请号：US10955336
申请日：2004-09-30
申请人： Georgios B. Giannakis , Xiaoli Ma
发明人： Georgios B. Giannakis , Xiaoli Ma
IPC分类号： H04K1/10 , H04L27/28
CPC分类号： H04B7/0669
摘要： A wireless communication system is described that generates FDFR transmissions with any number of transmit and receive antennas through flat-fading channels and frequency- or time-selective channels. In particular, the system utilizes layer-specific linear complex-field (LCF) coding with a circular form of layered space-time (ST) multiplexing to achieve FDFR wireless communications with any number of transmit and receive antennas through flat-fading and frequency- or time-selective channels. Additionally, the described techniques provide flexibility for desirable tradeoffs among performance, rate, and complexity.
摘要翻译：描述了通过平坦衰落信道和频率或时间选择性信道生成具有任何数量的发射和接收天线的FDFR传输的无线通信系统。特别地，该系统利用分层时空（ST）复用的圆形形式的层特有的线性复场（LCF）编码，以通过平坦衰落和频分复用来实现与任意数量的发射和接收天线的FDFR无线通信，或时间选择性渠道。另外，所描述的技术提供了在性能，速率和复杂度之间的期望权衡的灵活性。

10. 发明授权

US07496128B2 Multi-user interference resilient ultra wideband (UWB) communication 有权
标题翻译：多用户干扰弹性超宽带（UWB）通信
公开(公告)号：US07496128B2
公开(公告)日：2009-02-24
申请号：US10796895
申请日：2004-03-08
申请人： Georgios B. Giannakis , Liuqing Yang
发明人： Georgios B. Giannakis , Liuqing Yang
IPC分类号： H04B1/00
CPC分类号： H04B1/719 , H04J13/18
摘要： Techniques are described for maintaining the orthogonality of waveforms transmitted in ultra wideband (UWB) multi-user wireless communication systems. The multi-stage block-spreading (MS-BS) techniques described herein deterministically eliminate multiple user interference (MUI) in the presence of frequency-selective fading channels. A transmitter includes a block-spreading unit to generate a stream of frames from a block of information bearing symbols by applying an orthogonal set of spreading codes, such as direct sequence cod& division multiple access (CDMA) codes or digital carrier frequency multiple access codes, such that the frames corresponding to different blocks of the symbols are interleaved. The transmitter further includes a time-hopping spreading unit to generate a stream of chips from the stream of frames by applying an orthogonal set of time-hopping (TH) spreading codes such that chips corresponding to different frames are interleaved.
摘要翻译：描述了用于维持在超宽带（UWB）多用户无线通信系统中发送的波形的正交性的技术。本文描述的多级块扩展（MS-BS）技术在存在频率选择性衰落信道的情况下确定地消除了多用户干扰（MUI）。发射机包括块扩展单元，用于通过应用诸如直接序列码分多址（CDMA）码或数字载波频多址码等扩展码的正交集合从信息承载符号块生成帧流，使得对应于符号的不同块的帧被交织。发射机还包括跳频扩展单元，用于通过应用正交的跳时（TH）扩展码集合来生成来自帧流的码流，使得对应于不同帧的码片交错。

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