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21. 发明授权

US06396869B1 Modulation apparatus and method using zero-crossing detection 有权
标题翻译：使用过零检测的调制装置和方法
公开(公告)号：US06396869B1
公开(公告)日：2002-05-28
申请号：US09261748
申请日：1999-03-03
申请人： Jong-Hyeon Park , Je-Woo Kim
发明人： Jong-Hyeon Park , Je-Woo Kim
IPC分类号： H04B1500
CPC分类号： H04J13/0022 , H04B1/707 , H04J13/10 , H04L27/2078
摘要： A spread spectrum apparatus for a code division multiple access communication system maintains orthogonality between transmission signals. In the spread spectrum apparatus, a spreader combines first and second input signals with corresponding pseudo noise sequences to generate first and second spread signals. A zero-crossing detector determines whether zero-crossing occurs between the first spread signal and the second spread signal to generate a zero-crossing detection signal. A first delay staggers the first spread signal in a first direction and a second delay staggers the second spread signal in a second direction. A first selector selects one of the first spread signal and a first staggered signal and a second selector selects one of the second spread signal and a second staggered signal in response to the zero-crossing detection signal. Accordingly, first and second staggered signals are selected when zero-crossing occurs, and first and second spread signals are selected when zero-crossing does not occur, thereby maintaining orthogonality of transmission signals.
摘要翻译：用于码分多址通信系统的扩频装置保持发送信号之间的正交性。在扩展频谱装置中，扩展器将第一和第二输入信号与相应的伪噪声序列组合以产生第一和第二扩展信号。过零检测器确定在第一扩展信号和第二扩展信号之间是否产生过零点以产生过零检测信号。第一延迟在第一方向上交错第一扩展信号，第二延迟在第二方向上交错第二扩展信号。第一选择器选择第一扩展信号和第一交错信号中的一个，并且第二选择器响应于过零检测信号选择第二扩展信号和第二交错信号中的一个。因此，当过零发生时选择第一和第二交错信号，并且当不发生过零时选择第一和第二扩展信号，从而保持发送信号的正交性。

22. 发明授权

US06246715B1 Data transmitter and receiver of a DS-CDMA communication system 失效
标题翻译： DS-CDMA通信系统的数据发射机和接收机
公开(公告)号：US06246715B1
公开(公告)日：2001-06-12
申请号：US09105219
申请日：1998-06-26
申请人： Jong-Hyeon Park , Je-Woo Kim
发明人： Jong-Hyeon Park , Je-Woo Kim
IPC分类号： H04B1500
CPC分类号： H04L25/069 , H04B1/707 , H04B2201/70701 , H04L27/206 , H04L27/2273
摘要： A data transmitter and receiver in a DS-CDMA communication system designed to prevent a serious amplitude shift in a transmission signal, facilitate recovery of data and clock signals and relieve the constraint of using a high linearity, high performance amplifier. The data transmitter includes a spread signal generating device, in which I-arm and Q-arm information signals of the first channel are spread by I-arm and Q-arm PN codes, respectively, and I-arm and Q-arm information signals of a predetermined number of following channels are spread by an inverted Q-arm PN code and the I-arm PN code, respectively. The data receiver includes a despread signal generating device, in which an I-arm despread signal is generated by multiplying I-arm and Q-arm digital baseband spread signals by I-arm and Q-arm PN codes, respectively, and adding the multiplication results, while a Q-arm despread signal is generated by multiplying Q-arm and I-arm digital baseband spread signal by an inverted I-arm PN code and the Q-arm PN code, respectively, and adding the multiplication results.
摘要翻译： DS-CDMA通信系统中的数据发射机和接收机，旨在防止传输信号的严重幅度偏移，便于恢复数据和时钟信号，并减轻使用高线性，高性能放大器的约束。数据发送器包括扩展信号发生装置，其中第一通道的I臂和Q臂信息信号分别由I臂和Q臂PN代码扩展，I臂和Q臂信息信号的预定数量的后续通道分别由反向Q臂PN码和I型PN码扩展。数据接收机包括解扩信号发生装置，其中分别通过I臂和Q臂数字基带扩展信号乘以I臂和Q-arm PN码产生I臂解扩信号，并且将乘法相加结果，通过将Q臂和I臂数字基带扩展信号分别乘以反相I臂PN码和Q-臂PN码分别产生Q臂解扩信号，并相加乘法结果。

23. 发明授权

US5715244A Receiving apparatus for a base station in a code division multiple access system and signal receiving method therefor 失效
标题翻译：一种码分多址系统中基站的接收装置及其信号接收方法
公开(公告)号：US5715244A
公开(公告)日：1998-02-03
申请号：US562554
申请日：1995-11-24
申请人： Jong-Hyeon Park , Je-Woo Kim
发明人： Jong-Hyeon Park , Je-Woo Kim
IPC分类号： H04B7/26 , H04B7/216
CPC分类号： H04B7/2628
摘要： A receiving apparatus for a base station in a code division multiple access (CDMA) system performs a signal receiving method, and includes a pseudo-noise code generator that generates a pseudo-noise code corresponding to each receiving stage of a plurality of channels. A demodulator sequentially demodulates a received signal into baseband data according to the receiving stage in synchronization with the pseudo-noise code. A re-modulator re-modulates the baseband data to a signal of a channel corresponding to each mobile station in synchronization with a delayed pseudo-noise code.
摘要翻译：用于码分多址（CDMA）系统中的基站的接收装置执行信号接收方法，并且包括产生与多个信道的每个接收级对应的伪噪声码的伪噪声码发生器。解调器与伪噪声码同步地根据接收级顺序地将接收信号解调为基带数据。再调制器与延迟的伪噪声码同步地将基带数据重新调制为对应于每个移动站的信道的信号。

24. 发明授权

US08923424B2 Multi-term demapping for multi-channel wireless communication 有权
标题翻译：用于多通道无线通信的多项解映射
公开(公告)号：US08923424B2
公开(公告)日：2014-12-30
申请号：US12711128
申请日：2010-02-23
申请人： Michael L. McCloud , Matthias Brehler , Ju Won Park , Jong Hyeon Park , Je Woo Kim , Inyup Kang , Brian C. Banister
发明人： Michael L. McCloud , Matthias Brehler , Ju Won Park , Jong Hyeon Park , Je Woo Kim , Inyup Kang , Brian C. Banister
IPC分类号： H04B7/02 , H04L25/03 , H04B7/04
CPC分类号： H04L25/03229 , H04B7/0413 , H04L25/03242 , H04L25/03318 , H04L2025/0342 , H04L2025/03426
摘要： Providing for reduced complexity or improved accuracy in de-mapping received wireless data streams for multi-channel wireless communication is described herein. By way of example, a low-complexity likelihood algorithm can be employed to de-map data bits from the wireless data streams. In one particular example, the likelihood algorithm can approximate a received bit with a subset of received wireless symbols correlated the bit, reducing algorithm complexity. In other examples, a limited set of received wireless symbols can be employed for the subset, further reducing algorithm complexity. According to at least one other example, logarithmic terms of the algorithm can be approximated with non-logarithmic functions, such as a look-up table, series expansion, polynomial approximation, or the like. These approximations can enhance symbol de-mapping accuracy while maintaining or improving processing overhead for a wireless receiver.
摘要翻译：本文描述了为了解复用用于多信道无线通信的接收的无线数据流而提供降低的复杂度或提高的精度。作为示例，可以采用低复杂度似然算法来从无线数据流解映射数据比特。在一个特定示例中，似然算法可以用接收到的无线符号的子集近似接收到的比特，从而降低算法的复杂度。在其他示例中，可以对该子集采用有限的一组接收到的无线符号，进一步降低了算法的复杂度。根据至少另一个示例，算法的对数项可以用非对数函数来近似，例如查找表，串联展开，多项式近似等。这些近似可以增强符号解映射精度，同时保持或改善无线接收机的处理开销。

25. 发明授权

US08726138B2 Methods and systems for modified maximum-likelihood based TBCC decoding 有权
标题翻译：用于修改的最大似然的TBCC解码的方法和系统
公开(公告)号：US08726138B2
公开(公告)日：2014-05-13
申请号：US12250169
申请日：2008-10-13
申请人： Ju Won Park , Brian Banister , Je Woo Kim , Jong Hyeon Park , Matthias Brehler , Remi Gurski , Tae Chang
发明人： Ju Won Park , Brian Banister , Je Woo Kim , Jong Hyeon Park , Matthias Brehler , Remi Gurski , Tae Chang
IPC分类号： H03M13/00
CPC分类号： H03M13/413 , H03M13/3723 , H03M13/3955 , H03M13/3972 , H03M13/6544
摘要： A method and apparatus for decoding of tailbiting convolutional codes (TBCC) are disclosed. The proposed modified maximum-likelihood TBCC decoding technique preserves error correction performance of optimal maximum-likelihood based TBCC decoding, while the computational complexity is substantially decreased since a reduced number of decoding states has been evaluated. Compare to other sub-optimal TBCC decoding algorithms, modified maximum-likelihood TBCC decoding achieves improved packet error rate performance with similar computational complexity.
摘要翻译：公开了一种用于解码尾部卷积码（TBCC）的方法和装置。所提出的修改的最大似然TBCC解码技术保留了最佳最大似然度TBCC解码的纠错性能，同时由于已经减少了解码状态数量，所以计算复杂度显着降低。与其他次优TBCC解码算法相比，修改的最大似然TBCC解码实现了具有类似计算复杂度的改进的分组错误率性能。

26. 发明授权

US08634332B2 Using joint decoding engine in a wireless device 有权
标题翻译：在无线设备中使用联合解码引擎
公开(公告)号：US08634332B2
公开(公告)日：2014-01-21
申请号：US12769916
申请日：2010-04-29
申请人： Jia Tang , Atul A. Salvekar , Jonathan Sidi , Jong Hyeon Park , Subramanya P. Rao , Abhinav Gupta , Shantanu Khare , Gokhan Mergen
发明人： Jia Tang , Atul A. Salvekar , Jonathan Sidi , Jong Hyeon Park , Subramanya P. Rao , Abhinav Gupta , Shantanu Khare , Gokhan Mergen
IPC分类号： H04B7/00 , H04B7/185
CPC分类号： H04L25/03305 , H04L1/0048 , H04L1/0054 , H04L25/03331
摘要： A method for using a joint decoding engine in a wireless device is disclosed. A first symbol stream and a second symbol stream in a received multiple input multiple output (MIMO) signal is determined. A scaled channel estimate for a wireless transmission channel and a scaled noise covariance of the MIMO signal are also determined. The scaled channel estimate and the first symbol stream are whitened. Max log maximum a posteriori (MLM) processing is performed on the whitened first symbol stream to produce a first data stream. The first data stream may be de-rate matched and decoded to produce a decoded first data stream.
摘要翻译：公开了一种在无线装置中使用联合解码引擎的方法。确定接收的多输入多输出（MIMO）信号中的第一符号流和第二符号流。还确定了无线传输信道的缩放信道估计和MIMO信号的缩放噪声协方差。缩放的信道估计和第一符号流被白化。对白化的第一符号流执行最大对数最大后验（MLM）处理以产生第一数据流。第一数据流可以被去速率匹配和解码以产生解码的第一数据流。

27. 发明授权

US08625685B2 Signal quality estimation for OFDMA systems 失效
标题翻译： OFDMA系统的信号质量估计
公开(公告)号：US08625685B2
公开(公告)日：2014-01-07
申请号：US12035394
申请日：2008-02-21
申请人： Jong Hyeon Park , Je Woo Kim
发明人： Jong Hyeon Park , Je Woo Kim
IPC分类号： H04K1/10 , H04L27/28
CPC分类号： H04L1/20 , H04L27/261 , H04L27/2647
摘要： Certain embodiments utilize raw signals to estimate channel quality, as contrasted to utilizing equalized signals or after channel estimation. For example, signal quality may be estimated by calculating powers of pilot sub-carriers and null sub-carriers of the raw signals. To mitigate channel effect, certain embodiments utilize first and/or second order differentiation schemes.
摘要翻译：某些实施例利用原始信号估计信道质量，与使用均衡信号或信道估计相反。例如，可以通过计算原始信号的导频子载波的功率和空子载波来估计信号质量。为了减轻信道效应，某些实施例利用第一和/或第二阶微分方案。

28. 发明授权

US08537931B2 Methods and apparatus for synchronization and detection in wireless communication systems 有权
标题翻译：无线通信系统中同步和检测的方法和装置
公开(公告)号：US08537931B2
公开(公告)日：2013-09-17
申请号：US11969330
申请日：2008-01-04
申请人： Jong Hyeon Park , Bok Tae Sim , Tae Ryun Chang , Je Woo Kim , Ju Won Park , Chae Kwan Lee , Sameer Nanavati
发明人： Jong Hyeon Park , Bok Tae Sim , Tae Ryun Chang , Je Woo Kim , Ju Won Park , Chae Kwan Lee , Sameer Nanavati
IPC分类号： H03K9/00 , H04L27/00
CPC分类号： H04L27/2665 , H04L5/0048 , H04L27/2613 , H04L27/2659 , H04L27/266 , H04L27/2663 , H04L27/2675
摘要： A synchronization and detection method in a wireless device may include performing coarse detection and synchronization with respect to a received signal. The synchronization and detection method may also include performing fine detection and synchronization for acquisition of the received signal. Results of the coarse detection and synchronization may be used for the fine detection and synchronization. The synchronization and detection method may also include performing tracking mode processing when the acquisition of the received signal has been achieved.
摘要翻译：无线设备中的同步和检测方法可以包括对接收到的信号执行粗略检测和同步。同步和检测方法还可以包括执行精细检测和同步以获取接收到的信号。粗检测和同步的结果可以用于精细检测和同步。同步和检测方法还可以包括当已经获得接收信号的获取时执行跟踪模式处理。

29. 发明授权

US08392811B2 Methods and systems for a-priori decoding based on MAP messages 有权
标题翻译：基于MAP消息进行先验解码的方法和系统
公开(公告)号：US08392811B2
公开(公告)日：2013-03-05
申请号：US11970373
申请日：2008-01-07
申请人： Chun Woo Lee , Jong Hyeon Park
发明人： Chun Woo Lee , Jong Hyeon Park
IPC分类号： H03M13/00 , H03M13/03 , H04L27/06
CPC分类号： H03M13/4107 , H03M13/3994 , H03M13/6544
摘要： A method and apparatus for decoding encoded data bits of a wireless communication transmission are provided. A set of a-priori bit values corresponding to known bit values of the encoded data bits may be generated. Decoding paths that correspond to decoded data bits that are inconsistent with the a-priori bit values may be removed from the possible decoding paths to consider, and decoding the encoded data bits by selecting a decoding path from remaining decoding paths of the possible decoding paths that were not removed. A-priori bit values may be extracted from various messages, such as DL-MAP, UL-MAP, RNG-REQ, and BW-REQ messages.
摘要翻译：提供了一种用于解码无线通信传输的编码数据位的方法和装置。可以生成对应于编码数据位的已知位值的一组先验位值。可以从可能的解码路径中去除对应于与先验比特值不一致的解码数据比特的解码路径，并且通过从可能的解码路径的剩余解码路径中选择解码路径来解码编码数据比特，没有删除。可以从诸如DL-MAP，UL-MAP，RNG-REQ和BW-REQ消息的各种消息中提取先验比特值。

30. 发明授权

US08374274B2 Methods and systems using norm approximation for maximum likelihood MIMO decoding 有权
标题翻译：使用范数近似的最大似然MIMO解码的方法和系统
公开(公告)号：US08374274B2
公开(公告)日：2013-02-12
申请号：US12351820
申请日：2009-01-10
申请人： Jong Hyeon Park , Matthias Brehler , Brian Clarke Banister , Albert van Zelst , Tae Ryun Chang , Vincent K. Jones , Je Woo Kim
发明人： Jong Hyeon Park , Matthias Brehler , Brian Clarke Banister , Albert van Zelst , Tae Ryun Chang , Vincent K. Jones , Je Woo Kim
IPC分类号： H04B7/02 , H04L1/02
CPC分类号： H04L25/03171 , H04L5/0023 , H04L25/03197 , H04L25/03331 , H04L2025/03414 , H04L2025/03426
摘要： Certain embodiments of the present disclosure provide techniques for approximate computation of l2 norms as a part of the maximum likelihood (ML) detection: tri-maxmin, maxsum and sortsum algorithms. The proposed approximation schemes show better accuracy than conventional approximation schemes—the abssum and maxmin algorithms, while the computational complexity is very similar. The error rate performance of the ML detection that utilizes proposed norm-approximation techniques are very close to the reference ML detection with exact calculation of l2 norms, while the computational complexity is significantly smaller.
摘要翻译：本公开的某些实施例提供了作为最大似然（ML）检测的一部分近似计算l2范数的技术：tri-maxmin，maxsum和sortsum算法。所提出的近似方案显示出比传统的近似方案更好的精度 - abssum和maxmin算法，而计算复杂度非常相似。利用提出的范数近似技术的ML检测的误码率性能与精确计算l2范数的参考ML检测非常接近，而计算复杂度显着更小。

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