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1. 发明授权

US08144572B2 Detection and mitigation of interference and jammers in an OFDM system 有权
标题翻译：检测和减轻OFDM系统中的干扰和干扰
公开(公告)号：US08144572B2
公开(公告)日：2012-03-27
申请号：US11226654
申请日：2005-09-14
申请人： Matthew B. Shoemake , Sridhar Rajagopal , John D. Terry
发明人： Matthew B. Shoemake , Sridhar Rajagopal , John D. Terry
IPC分类号： H04J11/00
CPC分类号： H04B17/345
摘要： The present invention provides a method and apparatus for detecting interference in a wireless communications system. The invention compares the receiver FFT output of a received signal against known sequences such as the packet synchronization sequence, frame synchronization sequence, and channel estimation sequence. By comparing the reference signal to the known sequences, the invention estimates the instantaneous signal to noise ratio (SNR) for each tone of a wireless transmission. To improve the SNR estimate, the invention computes a weighted average across multiple OFDM symbols. The invention looks for significant increases (spikes) in the SNR as a way of distinguishing interfering signals from noise. The invention can store separate SNR estimates for each transmitter in a wireless network. One embodiment of the invention uses Viterbi branch metrics in conjunction with the estimated SNR to determine the presence of an interfering signal. If interference is detected the invention feeds the inverse of the SNR estimate into the Viterbi decoder or declares and erasure for that symbol.
摘要翻译：本发明提供一种用于检测无线通信系统中的干扰的方法和装置。本发明将接收信号的接收机FFT输出与诸如分组同步序列，帧同步序列和信道估计序列的已知序列进行比较。通过将参考信号与已知序列进行比较，本发明估计无线传输的每个音调的瞬时信噪比（SNR）。为了提高SNR估计，本发明计算跨多个OFDM符号的加权平均。本发明寻找SNR中的显着增加（尖峰）作为区分干扰信号和噪声的一种方式。本发明可以在无线网络中为每个发射机存储单独的SNR估计。本发明的一个实施例使用维特比分支度量结合估计的SNR来确定干扰信号的存在。如果检测到干扰，本发明将SNR估计的逆向馈送到维特比解码器中，或者声明并擦除该符号。

2. 发明授权

US07593339B2 Rate control for packet-based wireless communication 有权
标题翻译：基于分组的无线通信的速率控制
公开(公告)号：US07593339B2
公开(公告)日：2009-09-22
申请号：US11179248
申请日：2005-07-12
申请人： Matthew B. Shoemake , Sridhar Rajagopal
发明人： Matthew B. Shoemake , Sridhar Rajagopal
IPC分类号： H04L12/26
CPC分类号： H04L1/20 , H04L1/0002 , H04L1/0026 , H04L1/1607
摘要： The present invention provides a method and system for controlling the data rate in packet based wireless communications. Then, using the probability of error, the invention calculates the throughput and drop probability for two or more data rates and selects the data rate with highest throughput. In one embodiment of the invention, the probability of error based on information passed back from the receiver regarding decoding errors. In another embodiment, the probability of error is based on acknowledgement packets returned by the receiver.
摘要翻译：本发明提供了一种用于在基于分组的无线通信中控制数据速率的方法和系统。然后，利用错误概率，本发明计算两个或多个数据速率的吞吐量和丢弃概率，并选择吞吐量最高的数据速率。在本发明的一个实施例中，基于从接收机传回关于解码错误的信息的错误概率。在另一个实施例中，错误的概率基于接收机返回的确认分组。

3. 发明授权

US08265194B2 Virtual side channels for digital wireless communication systems 有权
标题翻译：用于数字无线通信系统的虚拟侧通道
公开(公告)号：US08265194B2
公开(公告)日：2012-09-11
申请号：US11114646
申请日：2005-04-25
申请人： Matthew B. Shoemake , Sridhar Rajagopal , David G. Brenner
发明人： Matthew B. Shoemake , Sridhar Rajagopal , David G. Brenner
IPC分类号： H04L27/00
CPC分类号： H04L27/2602
摘要： The present invention provides a method for enabling side channel communication between wireless devices. In one embodiment of the invention the guard tones in wireless OFDM signals are used for side channel communication. In another embodiment of the invention, unused bits in OFDM symbols are used as side channels instead of being padded with zeros or random bits.
摘要翻译：本发明提供了一种用于实现无线设备之间的侧信道通信的方法。在本发明的一个实施例中，无线OFDM信号中的保护音调用于侧信道通信。在本发明的另一实施例中，OFDM符号中的未使用的比特用作侧信道，而不是用零或随机比特填充。

4. 发明授权

US07684505B2 Method and apparatus for encoding interleaving and mapping data to facilitate GBPS data rates in wireless systems 有权
标题翻译：用于编码交织和映射数据以便于无线系统中的GBPS数据速率的方法和装置
公开(公告)号：US07684505B2
公开(公告)日：2010-03-23
申请号：US11114752
申请日：2005-04-25
申请人： Sridhar Rajagopal , Matthew B. Shoemake , John Terry
发明人： Sridhar Rajagopal , Matthew B. Shoemake , John Terry
IPC分类号： H04L5/12
CPC分类号： H04L25/4917 , H03M13/2707 , H03M13/4161 , H04L1/0041 , H04L1/0054 , H04L1/006 , H04L1/0069 , H04L1/007 , H04L1/0071 , H04L27/34
摘要： A method and apparatus for encoding data for wireless transmission. The invention includes multi-level coding in which data is partitioned between two encoders, one for encoding Most Significant Bits (MSBs) and the other for encoding Least Significant Bits (LSBs). By partition bits separately for the MSBs and LSBs, the complexity of the decoder may be reduced. The MSBs and LSBs are interleaved such that each MSB is a function of just one LSB, simplifying branch metric selection during Viterbi decoding. This also allows parallel de-interleaving by the receiver, which reduces the interleaving latency of the receiver. A block interleaver jointly optimizes the symbol hamming distance of the symbols and the bit hamming distance of each constituent encoder for the MSBs and LSBs.
摘要翻译：一种用于编码无线传输数据的方法和装置。本发明包括多级编码，其中数据在两个编码器之间分配，一个用于编码最高有效位（MSB），另一个用于编码最低有效位（LSB）。通过分开MSB和LSB的分配位，解码器的复杂度可能会降低。 MSB和LSB被交错，使得每个MSB是仅一个LSB的函数，从而简化维特比解码期间的分支度量选择。这也允许接收机的并行解交织，这降低了接收机的交织等待时间。块交织器共同优化符号的符号汉明距离和每个组成编码器对于MSB和LSB的比特汉明距离。

5. 发明授权

US07830782B2 Method of using guard tones in OFDM systems for increasing robustness 有权
标题翻译：在OFDM系统中使用保护音调以提高鲁棒性的方法
公开(公告)号：US07830782B2
公开(公告)日：2010-11-09
申请号：US11125714
申请日：2005-05-10
申请人： Matthew B. Shoemake , Sridhar Rajagopal , Lee Bradshaw
发明人： Matthew B. Shoemake , Sridhar Rajagopal , Lee Bradshaw
IPC分类号： H04J11/00
CPC分类号： H04L1/0059 , H04L1/0041 , H04L1/0069 , H04L1/0071 , H04L27/2602 , H04L27/261
摘要： The present invention provides a method and system for increasing communication robustness between wireless communication devices by transmitting data on Orthogonal Frequency Division Multiplexing (OFDM) guard tones. In one embodiment, punctured bits are sent on the guard tones. In an alternate embodiment, the full bandwidth provided by the guard tones in used to determine the optimal puncture pattern. The present invention can also use guard tones to duplicate data from those tones which are experiencing channel interference. The receiver feeds back information about tones in interference, and the transmitter send the interfered data on the guard tones. Guard tones are used for sending feedback information to the transmitter in order to increase system robustness. This provides the transmitter with information on how to use the guard tones and adapt the transmission data rates to maximize system performance.
摘要翻译：本发明提供一种用于通过在正交频分复用（OFDM）保护音上传送数据来增加无线通信设备之间的通信鲁棒性的方法和系统。在一个实施例中，穿孔位在保护音上发送。在替代实施例中，由保护音提供的用于确定最佳穿刺模式的全带宽。本发明还可以使用保护音来从经历信道干扰的那些音调复制数据。接收机反馈关于干扰中的音调的信息，并且发射机在保护音上发送被干扰的数据。保护音用于向发射机发送反馈信息，以提高系统的鲁棒性。这为发射机提供了有关如何使用保护音调和调整传输数据速率以使系统性能最大化的信息。

6. 发明授权

US08102925B2 Low peak-to-average ratio preamble, and associated method, for packet radio communication system 有权
标题翻译：用于分组无线电通信系统的低峰值平均比率前导码和相关方法
公开(公告)号：US08102925B2
公开(公告)日：2012-01-24
申请号：US11057865
申请日：2005-02-14
申请人： Matthew B. Shoemake
发明人： Matthew B. Shoemake
IPC分类号： H04L27/28
CPC分类号： H04L27/2613 , H04L25/0226 , H04L27/2614
摘要： Apparatus, and an associated method, for facilitating communications is a packet radio communication system, such as an IEEE 802.15.3a-compliant communication system. A deterministic sequence is used as a channel estimation sequence. The channel estimation sequence exhibits a peak-to-average ratio of lower than 8.86 dB.
摘要翻译：用于促进通信的装置和相关方法是分组无线电通信系统，诸如符合IEEE 802.15.3a的通信系统。确定性序列用作信道估计序列。信道估计序列的峰均比低于8.86dB。

7. 发明授权

US07518997B2 Wireless mobile communication stations for operation in non-exclusive spectrum 有权
标题翻译：无线移动通信站用于非排他性频谱
公开(公告)号：US07518997B2
公开(公告)日：2009-04-14
申请号：US10679762
申请日：2003-10-06
申请人： William R. Krenik , Carl M. Panasik , Matthew B. Shoemake
发明人： William R. Krenik , Carl M. Panasik , Matthew B. Shoemake
IPC分类号： G01R31/08 , G06F11/00 , G08C15/00 , H04J1/16 , H04J3/14 , H04L1/00 , H04L12/26 , H04B7/00 , H04M1/56 , H04M15/06 , H04M3/42
CPC分类号： H04W28/14 , H04L1/0023 , H04W8/22 , H04W8/245 , H04W16/14 , H04W28/12 , H04W48/08 , H04W76/10 , H04W88/06 , H04W92/16
摘要： Wirelessly-linked, distributed resource control (RCS1-RCSn, RCSB, RCC, ARM) supports a wireless communication system (50) for operation in non-exclusive spectrum (24-29). An available resource map (ARM) contains resource availability information gathered by mobile stations (MS1-MSn), and a wired communication channel supports sharing of resource control information among fixed-site stations (BS).
摘要翻译：无线连接的分布式资源控制（RCS1-RCSn，RCSB，RCC，ARM）支持无线通信系统（50），用于在非专有频谱（24-29）中操作。可用资源图（ARM）包含由移动站（MS1-MSn）收集的资源可用性信息，有线通信信道支持在固定站点（BS）之间共享资源控制信息。

8. 发明授权

US07508781B2 Power saving mechanism for wireless LANs via schedule information vector 有权
标题翻译：无线局域网的节电机制通过时间表信息向量
公开(公告)号：US07508781B2
公开(公告)日：2009-03-24
申请号：US10396921
申请日：2003-03-25
申请人： Yonghe Liu , Jin-Meng Ho , Matthew B. Shoemake
发明人： Yonghe Liu , Jin-Meng Ho , Matthew B. Shoemake
IPC分类号： G08C17/00
CPC分类号： H04W52/0216 , H04W72/12 , H04W74/06 , H04W84/12 , H04W88/08 , Y02D70/142 , Y02D70/144 , Y02D70/22
摘要： A new protocol system and method is described that utilizes a Schedule Information Vector (SIV) protocol for saving power in wireless local area networks. The protocol includes an access point, one or more stations, and an SIV frame including an association ID for identifying one of the stations and a scheduled wake-up time for the identified station. The access point originates and transmits the SIV frame protocol of the scheduled wake-up time to the stations. The SIV frame protocol of the wireless network is further operable to dynamically adjust the scheduled wake-up times of the stations, a sequence of the wake-up times, a periodic wake-up time, a plurality of wake-up times, and a duration of the wake-up times of the stations. These adjustments may be made based on network traffic, traffic buffering times, data priorities, data length, and data rates.
摘要翻译：描述了一种新的协议系统和方法，其利用计划信息向量（SIV）协议来节省无线局域网中的功率。该协议包括接入点，一个或多个站，以及SIV帧，其包括用于识别站中的一个的关联ID以及所识别的站的预定的唤醒时间。接入点将预定的唤醒时间的SIV帧协议发送到站。无线网络的SIV帧协议还可用于动态地调整站的调度的唤醒时间，唤醒时间的顺序，周期性的唤醒时间，多个唤醒时间和车站唤醒时间的持续时间。这些调整可以基于网络流量，流量缓冲时间，数据优先级，数据长度和数据速率进行。

9. 发明授权

US07400903B2 Wireless communications system using both licensed and unlicensed frequency bands 有权
标题翻译：使用许可和非许可频带的无线通信系统
公开(公告)号：US07400903B2
公开(公告)日：2008-07-15
申请号：US10413648
申请日：2003-04-15
申请人： Matthew B. Shoemake , Carl M. Panasik , Jie Liang
发明人： Matthew B. Shoemake , Carl M. Panasik , Jie Liang
IPC分类号： H04M1/00
CPC分类号： H04W72/02 , H04W4/12 , H04W28/18 , H04W48/16
摘要： A communications system including devices (10, 20) for transmitting and receiving wireless communications over licensed and unlicensed bands is disclosed. On the transmit side, a device (10) includes a plurality of message sources (8A, 8B, 8C) and a smart router (12) function executed by a processor (30) within the device. The smart router (12) function allocates each wireless transmission, or components of a multicomponent wireless transmission, over a licensed wireless link (LLTX) or an unlicensed wireless link (ULTX), by optimizing various factors. The allocation factors include the availability of the unlicensed and licensed channels within range of the transmitting device (10); quality of service parameters such as time delay limits, jitter limits, bandwidth requirements, and the like; cost tolerance and cost per minute factors; power consumption expectations; and a combination of these and other factors. Transmission of the wireless message over the selected wireless links is then carried out. A receiving device (20) may include a smart receiver (22) that resequences the components of a multicomponent transmission for forwarding to output functions (24A, 24B, 24C) of the receiving device (20).
摘要翻译：公开了一种通信系统，包括用于通过许可和非授权频带发送和接收无线通信的设备（10,20）。在发送侧，设备（10）包括由设备内的处理器（30）执行的多个消息源（8A，8B，8C）和智能路由器（12）功能。智能路由器（12）功能通过优化各种因素来分配许可无线链路（LLTX）或非许可无线链路（ULTX）上的每个无线传输或多组件无线传输的组件。分配因素包括在发射设备（10）的范围内的无许可和许可频道的可用性; 服务质量参数如延时限制，抖动限制，带宽要求等; 成本容差和每分钟成本因素; 功耗预期; 以及这些因素的组合。然后执行通过所选择的无线链路的无线消息的传输。接收设备（20）可以包括智能接收器（22），其将多分组传输的组件重新排序以转发到接收设备（20）的输出功能（24A，24B，24C）。

10. 发明授权

US07209467B2 Adaptive adjustment of backoff times in wireless network communications 有权
标题翻译：无线网络通信中退避时间的自适应调整
公开(公告)号：US07209467B2
公开(公告)日：2007-04-24
申请号：US10304973
申请日：2002-11-26
申请人： Yonghe Liu , Matthew B. Shoemake , Jin-Meng Ho
发明人： Yonghe Liu , Matthew B. Shoemake , Jin-Meng Ho
IPC分类号： H04Q7/24 , H04J3/00 , H04B7/212 , H04L12/413
CPC分类号： H04W74/085 , H04W74/006 , H04W74/0833 , H04W84/12
摘要： A wireless network, including a plurality of network elements such as a wireless access point (9), and computer stations (2, 4, 6), is disclosed. The wireless network operates so that each network element (2, 4, 6, 9) waits for a pseudo-randomly selected duration, after the end of a frame on the channel, before initiating transmission. One of the network elements, such as the wireless access point (9), measures the performance of the network over a measurement period (T), and adjusts a minimum value of the upper limit of the range from which the random duration is selected, according to the performance of the network over the measurement period. The times measured may be the successful transmission time (Ts), which is maximized in adjusting the minimum value, or the idle and collision times (T1, Tc), which are equated in the optimization of the minimum value.
摘要翻译：公开了一种包括诸如无线接入点（9）和计算机站（2,4,6）之类的多个网络元件的无线网络。无线网络操作，使得每个网络元件（2,4,6,9）在开始传输之前在信道上的帧结束之后等待伪随机选择的持续时间。诸如无线接入点（9）的网络元件之一在测量周期（T）测量网络的性能，并且调整选择随机持续时间的范围的上限的最小值，根据网络在测量期间的表现。所测量的时间可以是在调整最小值时最大化的传输时间（T SUB），或空闲和冲突时间（T 1 SUB，T _{c ），它们在最小值的优化中相等。}

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