公开(公告)号：US07453966B2

公开(公告)日：2008-11-18

申请号：US11035297

申请日：2005-01-12

申请人： Clive K. Tang ,  Victor J. Stolpman

发明人： Clive K. Tang ,  Victor J. Stolpman

IPC分类号： H04L25/08

CPC分类号： H04L27/2608

摘要： In one aspect thereof this invention provides a method to increase data throughput in an Orthogonal Frequency Division Multiplex (OFDM) wireless communications system. The method includes modeling data throughput as a function of received Signal to Noise Ratio (SNR) with a sigmoid function to produce a throughput curve characterized as having a lower knee region and an upper knee region; and performing a gradient ascent search along the throughput curve by varying the power of a plurality of sub-carriers so as to remove power from any sub-carrier having a received SNR to the left of the lower knee region, and to re-allocate the removed power to sub-carriers having a received SNR to the right of the lower knee region.

摘要翻译： 在其一方面，本发明提供了一种增加正交频分复用（OFDM）无线通信系统中的数据吞吐量的方法。 该方法包括以S形函数建模作为接收到的信噪比（SNR）的函数的数据吞吐量，以产生特征为具有较低膝盖区域和上膝部区域的吞吐量曲线; 以及通过改变多个子载波的功率沿着吞吐量曲线执行梯度上升搜索，以便从具有接收到的SNR的任何副载波的功率从下膝盖区域的左侧移除，并重新分配 将具有接收到的SNR的子载波的功率移除到下膝部区域的右侧。

公开(公告)号：US07123580B2

公开(公告)日：2006-10-17

申请号：US10760033

申请日：2004-01-16

申请人： Clive K Tang ,  Victor J Stolpman

发明人： Clive K Tang ,  Victor J Stolpman

IPC分类号： H04B7/216

CPC分类号： H04L1/0021 ,  H04B7/2628 ,  H04L1/0003 ,  H04L5/0007 ,  H04L5/0021 ,  H04L5/0028 ,  H04L5/0039 ,  H04L5/0046 ,  H04L5/006 ,  H04L5/0064 ,  H04L5/0094 ,  H04L27/0008

摘要： In a multi-user frequency domain spreading downlink MC-CDMA system, a group of sub-carriers can be replaced by an equivalent sub-carrier of a conventional OFDM modem for purposes of resource allocation to improve the system performance. The chips for a given user are spread only within the group. Confinement insures synchronization between different users' chips that is essential to the recovering and separation of user symbols at the receiver. There is no limit imposed on the group size, which permits different spreading code lengths to be used for different scenarios or for performance tuning.

摘要翻译： 在多用户频域扩展下行链路MC-CDMA系统中，为了提高系统性能，可以将一组子载波替换为传统OFDM调制解调器的等效子载波。 给定用户的芯片仅在组内传播。 限制确保不同用户的芯片之间的同步，这对于在接收器处恢复和分离用户符号至关重要。 对组大小没有限制，这允许不同扩展码长度用于不同场景或性能调整。

公开(公告)号：US07016297B2

公开(公告)日：2006-03-21

申请号：US10732066

申请日：2003-12-10

申请人： Clive K Tang ,  Victor J Stolpman

发明人： Clive K Tang ,  Victor J Stolpman

IPC分类号： H04J9/00 ,  G05B19/418

CPC分类号： H04L1/0009 ,  H04L1/0003 ,  H04L1/0021 ,  H04L27/2601

摘要： Disclosed is an OFDM communications system and a method of operating the OFDM communications system. The system includes an OFDM transmitter for transmitting data over a plurality of OFDM sub-channels, where the OFDM transmitter has a plurality of modulators of different types. The system further includes an OFDM receiver for receiving the data from the plurality of OFDM sub-channels, where the OFDM receiver has a plurality of corresponding demodulators of the different types. The system further includes, in accordance with this invention, an adaptive learning automata that contains a group or team of independent, decentralized automaton operating in accordance with a game theory-based approach. Each of the plurality of automaton are responsible for managing one MCS switching threshold value so as to maximize at least one selected performance criterion. The OFDM transmitter is responsive to the MCS switching thresholds for selecting an appropriate one or ones of said modulators for modulating the data for various ones of the sub-channels.

摘要翻译： 公开了OFDM通信系统和操作OFDM通信系统的方法。 该系统包括用于在多个OFDM子信道上发送数据的OFDM发射机，其中OFDM发射机具有多个不同类型的调制器。 该系统还包括用于从多个OFDM子信道接收数据的OFDM接收机，其中OFDM接收机具有多个不同类型的对应解调器。 该系统还包括根据本发明的自适应学习自动机，其包含根据基于游戏理论的方法操作的独立的分散式自动机的组或团队。 多个自动机中的每一个负责管理一个MCS切换阈值，以使至少一个所选择的性能标准最大化。 OFDM发射机响应于MCS切换阈值，用于选择用于调制各个子信道的数据的所述调制器中适当的一个或多个调制器。

公开(公告)号：US07746758B2

公开(公告)日：2010-06-29

申请号：US11632359

申请日：2004-08-17

申请人： Victor J. Stolpman

发明人： Victor J. Stolpman

IPC分类号： H04J11/00

CPC分类号： H04L1/005 ,  H04L1/0041 ,  H04L5/0037 ,  H04L5/0046 ,  H04L5/0048 ,  H04L5/0058

摘要： A multiple-access communications downlink uses OFDM and error-correcting codes to send data to multiple terminals from a single access point, in which packets of message information for multiple users are aggregated and encoded into a single error-correction codeword, in which assigned time slots corresponding to specific OFDM symbols are used to separate different users, so that a near-capacity achieving channel coding system constructs a single codeword for use with iterative decoding architectures at the mobile terminals.

摘要翻译： 多址通信下行链路使用OFDM和纠错码从单个接入点向多个终端发送数据，其中多个用户的消息信息分组被聚合并编码成单个纠错码字，其中分配时间 使用与特定OFDM符号相对应的时隙来分离不同的用户，使得接近容量的实现信道编码系统构造单个码字以与移动终端处的迭代解码体系结构一起使用。

公开(公告)号：US07222284B2

公开(公告)日：2007-05-22

申请号：US10608943

申请日：2003-06-26

申请人： Victor J. Stolpman

发明人： Victor J. Stolpman

IPC分类号： H03M13/35

CPC分类号： H03M13/1102 ,  H03M13/033 ,  H03M13/6362 ,  H03M13/6393 ,  H04L1/0009 ,  H04L1/0041 ,  H04L1/0051 ,  H04L1/0057 ,  H04L1/0069

摘要： Puncture sequences S1, S2, etc. for code rates R1, R2, etc. less than a maximum code rate Rmax are defined subsets of a maximum rate puncture sequence Smax that corresponds to the maximum code rate Rmax. Each puncture sequence Si for a code rate Ri is related to the puncture sequence Si−1, of the previous code rate Ri−1, and preferably S1⊂S2⊂ . . . ⊂Smax−1⊂Smax. The puncture sequences are groups of one or more memory elements, each of which is a variable degree, a variable node location, a check degree, or a check node location. A method for deriving such a puncture sequence for variable code rates is also disclosed.

摘要翻译： 针对码率R 1，R 2等的穿刺序列S 1，S 2，...等等 而最大码率R max max是对应于最大码率R max max的最大速率穿孔序列S MAX的最大码率子集。 针对码率R i i i的每个穿孔序列S i i与先前码率R'的穿孔序列S i-1相关， SUB> i-1 ，并且优选地S 1 =“SINGLE”>⊂S<2> ⊂。 。 。 ⊂S _{max-1 ⊂S max 。 穿刺序列是一个或多个存储器元件的组，每个存储器元件是可变度，变量节点位置，校验度或校验节点位置。 还公开了用于导出用于可变码率的这种穿刺序列的方法。}