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1. 发明授权

US06882679B2 Extension of wireless local area network communication system to accommodate higher data rates while preserving legacy receiver features 有权
标题翻译：扩展无线局域网通信系统以适应更高的数据速率，同时保留传统的接收机功能
公开(公告)号：US06882679B2
公开(公告)日：2005-04-19
申请号：US09753048
申请日：2000-12-29
申请人： V. Srinivasa Somayazulu , Srinivas Kandala , John M. Kowalski , Chan K. Park
发明人： V. Srinivasa Somayazulu , Srinivas Kandala , John M. Kowalski , Chan K. Park
IPC分类号： H04B1/69 , H04B15/00 , H04J13/16 , H04K1/00 , H04L27/20
CPC分类号： H04L27/2046 , H04J13/16 , H04L27/205
摘要： In a direct sequence spread spectrum data communication system an information bit is mixed with a pseudorandom noise or spreading code to produce modulated codeword for transmission. A method of bandwidth efficient M-ary phase shift key modulation encoding at least 16 bits of data to a single codeword is disclosed for extending the data rate of a spread spectrum system. Interoperability with legacy devices is maximized by maintaining structural similarity between the modulated waveforms of the extended data rate and legacy systems.
摘要翻译：在直接序列扩展频谱数据通信系统中，信息比特与伪随机噪声或扩展码混合以产生用于传输的调制码字。公开了一种用于扩展扩展频谱系统的数据速率的带宽有效M相移相关调制方法，其将至少16位的数据编码到单个码字。通过保持扩展数据速率的调制波形和传统系统之间的结构相似性，可以最大化与传统设备的互操作性。

2. 发明授权

US06085104A Pilot aided, time-varying finite impulse response, adaptive channel matching receiving system and method 失效
标题翻译：导频辅助，时变有限脉冲响应，自适应信道匹配接收系统和方法
公开(公告)号：US06085104A
公开(公告)日：2000-07-04
申请号：US48240
申请日：1998-03-25
申请人： John M. Kowalski , Srinivas Kandala , V. Srinivasa Somayazulu
发明人： John M. Kowalski , Srinivas Kandala , V. Srinivasa Somayazulu
IPC分类号： H04B1/7115 , H04B1/712 , H04B7/08 , H04B15/00
CPC分类号： H04B1/7115 , H04B7/0845 , H04B7/0891 , H04B1/712
摘要： A wideband receiver, including a time-varying finite impulse response (FIR) filter, has been provided to combine multipath communications of data in response to pilot channel timing information. The time-varying FIR processes the multipath communications through independent signal paths. Each signal path includes a variable delay circuit and a variable gain circuit. The delay of each separate signal path is adjusted and made equal in response to the pilot channel timing information. Likewise, the gain of each signal path is adjusted in response to pilot channel gain information to maximize the signal to noise ratio of the combined signal paths. The separate signal paths are then summed in a combiner circuit. The time-varying FIR permits the data communication to be summed either before, or after demodulation. A method of combining multipath communications using a time-varying FIR is also provided.
摘要翻译：已经提供了包括时变有限脉冲响应（FIR）滤波器的宽带接收机，以响应于导频信道定时信息来组合数据的多路径通信。时变FIR通过独立的信号路径处理多路径通信。每个信号路径包括可变延迟电路和可变增益电路。每个单独的信号路径的延迟被调整并且响应于导频信道定时信息使其相等。类似地，响应于导频信道增益信息调整每个信号路径的增益，以最大化组合信号路径的信噪比。然后将单独的信号路径在组合器电路中相加。时变FIR允许在解调之前或之后将数据通信相加。还提供了使用时变FIR组合多路径通信的方法。

3. 发明授权

US06977972B1 Method of hybrid soft/hard decision demodulation of signals with multilevel modulation 失效
标题翻译：多电平调制信号混合软/硬判决解调方法
公开(公告)号：US06977972B1
公开(公告)日：2005-12-20
申请号：US09614784
申请日：2000-07-12
申请人： Srinivas Kandala , V. Srinivasa Somayazulu , Chan K. Park
发明人： Srinivas Kandala , V. Srinivasa Somayazulu , Chan K. Park
IPC分类号： H04L25/06 , H04L27/00 , H04L27/22
CPC分类号： H04L25/067
摘要： The performance of forward error correction decoders for digital communication systems can be improved if soft information relating the reliability of the value representing the demodulated signal is provided to the decoder with a value for the signal. On the other hand, soft information increases the quantity of information that must be processed, increasing the cost and complexity of the decoder.
摘要翻译：如果将与表示解调信号的值的可靠性相关联的软信息以信号的值提供给解码器，则可以提高数字通信系统的前向纠错解码器的性能。另一方面，软信息增加了必须处理的信息量，增加了解码器的成本和复杂性。

4. 发明授权

US06208632B1 System and method for CDMA channel estimation 失效
标题翻译： CDMA信道估计的系统和方法
公开(公告)号：US06208632B1
公开(公告)日：2001-03-27
申请号：US09015424
申请日：1998-01-29
申请人： John M. Kowalski , Srinivas Kandala , V. Srinivasa Somayazulu
发明人： John M. Kowalski , Srinivas Kandala , V. Srinivasa Somayazulu
IPC分类号： H04B7216
CPC分类号： H04W52/42 , H04B1/707 , H04B1/7077 , H04B1/7117 , H04B7/0851 , H04B7/2631 , H04B2201/70701 , H04B2201/70702 , H04J3/0602
摘要： A wideband CDMA receiver system to accept messages from asynchronously transmitting base stations is provided. The base station transmission to each receiver includes a perch channel and at least one traffic channel. Although all the channels typically include pilot symbols for the purpose of demodulating the information symbols of the channel, the pilot channel includes a higher proportion of pilot symbols to information symbols. Therefore, a perch channel based timing and estimation system is inherently more accurate. In addition, the perch channel is generally transmitted at higher power levels than a traffic channel, and the resulting, higher, signal to noise ratio signal also improves the accuracy of the timing and channel estimation. Based on the timing derived from the perch channel of a first base station, the receiver can set the timing of the traffic channel transmissions from a second base station, to more closely match the timing of traffic channel transmissions from the first base station. In this manner, the signal to noise ratio of the demodulated traffic channel information symbols is enhanced through the diversity of using the transmissions of two base stations. A method for receiving wideband CDMA transmissions from asynchronously transmitting base stations is also provided.
摘要翻译：提供了一种用于接受来自异步发送基站的消息的宽带CDMA接收机系统。到每个接收机的基站传输包括导频信道和至少一个业务信道。虽然所有信道通常包括用于解调信道的信息符号的导频符号，但是导频信道包括较高比例的导频符号到信息符号。因此，基于导频信道的定时和估计系统本质上更准确。此外，导频信道通常以比业务信道更高的功率电平发送，并且所得到的更高的信噪比信号也提高了定时和信道估计的精度。基于从第一基站的导频信道导出的定时，接收机可以设置来自第二基站的业务信道传输的定时，以更紧密地匹配来自第一基站的业务信道传输的定时。以这种方式，通过使用两个基站的传输的分集来增强解调业务信道信息符号的信噪比。还提供了用于从异步发送基站接收宽带CDMA传输的方法。

5. 发明授权

US06289061B1 Wideband frequency tracking system and method 有权
标题翻译：宽带频率跟踪系统及方法
公开(公告)号：US06289061B1
公开(公告)日：2001-09-11
申请号：US09160551
申请日：1998-09-24
申请人： Srinivas Kandala , V. Srinivasa Somayazulu , John M. Kowalski , Hirohiko Yamamoto
发明人： Srinivas Kandala , V. Srinivasa Somayazulu , John M. Kowalski , Hirohiko Yamamoto
IPC分类号： H04L2706
CPC分类号： H04B1/7115 , H04B1/7117
摘要： A wideband receiver automatic frequency control (AFC) system which combines multipath or diverse antenna signals, before the carrier frequency error is determined, is provided herein. Rather than independently calculating the frequency error of each transmission path, frequency error is calculated after the multipath signals are summed together. Thus, only a single frequency detector circuit is required. The resulting automatic frequency control system has the accuracy of a system which combines the independently calculated frequency errors, with fewer steps of computation required. A method for combining multipath signals to calculate an average AFC frequency error is also provided.
摘要翻译：本文提供了在确定载波频率误差之前组合多路径或多种天线信号的宽带接收机自动频率控制（AFC）系统。不是独立地计算每个传输路径的频率误差，而是在将多路径信号相加在一起之后计算频率误差。因此，仅需要单个频率检测器电路。所得到的自动频率控制系统具有组合独立计算的频率误差的系统的精度，需要较少的计算步骤。还提供了组合多径信号以计算平均AFC频率误差的方法。

6. 发明授权

US07519035B2 Method to negotiate consumed power versus medium occupancy time in MIMO based WLAN systems using admission control 有权
标题翻译：在使用准入控制的基于MIMO的WLAN系统中协商消耗功率与中等占用时间的方法
公开(公告)号：US07519035B2
公开(公告)日：2009-04-14
申请号：US11050487
申请日：2005-02-01
申请人： John M. Kowalski , Srinivas Kandala
发明人： John M. Kowalski , Srinivas Kandala
IPC分类号： H04Q7/24
CPC分类号： H04W40/00 , H04B7/0413 , H04B7/0689 , H04W52/0206 , H04W74/02 , H04W84/12 , Y02D70/142 , Y02D70/444
摘要： A method of selectively providing MIMO transmission/reception in a WLAN system includes using a TSPEC reservation and signaling mechanism to instantiate and tear down, dynamically, multi-channel operation in a WLAN; providing an inference algorithm to determine the minimum number of channels required to establish a TSPEC using a MIMO WLAN system; providing specific channel parameters as parameters to be negotiated in the TSPEC; providing frame exchange sequences to be used in Enhanced Distributed Coordinated Access contention based access and to be used in polled access; and providing a mechanism wherein an access point makes a decision as to whether to admit MIMO functionality on a given link, wherein a “link” is a set of communications between two specific WLAN stations.
摘要翻译：在WLAN系统中选择性地提供MIMO发送/接收的方法包括使用TSPEC预留和信令机制来实时和拆除WLAN中的多信道操作; 提供推理算法来确定使用MIMO WLAN系统建立TSPEC所需的最小信道数量; 提供特定的信道参数作为在TSPEC中协商的参数; 提供要用于基于增强型分布式协调访问竞争的访问中并用于轮询访问的帧交换序列; 以及提供一种机制，其中接入点决定是否允许给定链路上的MIMO功能，其中“链路”是两个特定WLAN站之间的一组通信。

7. 发明授权

US07272119B2 Methods and systems for quality of service in networks comprising wireless devices 有权
标题翻译：包括无线设备的网络中的服务质量的方法和系统
公开(公告)号：US07272119B2
公开(公告)日：2007-09-18
申请号：US10063756
申请日：2002-05-10
申请人： William Michael Rudnick , John M. Kowalski , Srinivas Kandala
发明人： William Michael Rudnick , John M. Kowalski , Srinivas Kandala
IPC分类号： H04Q7/00
CPC分类号： H04W74/06 , H04L12/403 , H04L47/10 , H04L47/13 , H04L47/14 , H04L47/24 , H04W84/18
摘要： Embodiments of the present invention comprise systems and methods for providing transmission priority to stations in a wireless LAN system.
摘要翻译：本发明的实施例包括用于向无线LAN系统中的站提供传输优先级的系统和方法。

8. 再颁专利

USRE43109E1 Method to negotiate consumed power versus medium occupancy time in MIMO based WLAN systems using admission control 有权
标题翻译：在使用准入控制的基于MIMO的WLAN系统中协商消耗功率与中等占用时间的方法
公开(公告)号：USRE43109E1
公开(公告)日：2012-01-17
申请号：US13086296
申请日：2011-04-13
申请人： John M. Kowalski , Srinivas Kandala
发明人： John M. Kowalski , Srinivas Kandala
IPC分类号： H04W4/00
CPC分类号： H04W40/00 , H04B7/0413 , H04B7/0689 , H04W52/0206 , H04W74/02 , H04W84/12 , Y02D70/142 , Y02D70/444
摘要： A method of selectively providing MIMO transmission/reception in a WLAN system includes using a TSPEC reservation and signaling mechanism to instantiate and tear down, dynamically, multi-channel operation in a WLAN; providing an inference algorithm to determine the minimum number of channels required to establish a TSPEC using a MIMO WLAN system; providing specific channel parameters as parameters to be negotiated in the TSPEC; providing frame exchange sequences to be used in Enhanced Distributed Coordinated Access contention based access and to be used in polled access; and providing a mechanism wherein an access point makes a decision as to whether to admit MIMO functionality on a given link, wherein a “link” is a set of communications between two specific WLAN stations.
摘要翻译：在WLAN系统中选择性地提供MIMO发送/接收的方法包括使用TSPEC预留和信令机制来实时和拆除WLAN中的多信道操作; 提供推理算法来确定使用MIMO WLAN系统建立TSPEC所需的最小信道数量; 提供特定的信道参数作为在TSPEC中协商的参数; 提供要用于基于增强型分布式协调访问竞争的访问中并用于轮询访问的帧交换序列; 以及提供一种机制，其中接入点决定是否允许给定链路上的MIMO功能，其中“链路”是两个特定WLAN站之间的一组通信。

9. 发明授权

US07957331B2 Power saving wireless local area network portable device 有权
标题翻译：省电无线局域网便携式设备
公开(公告)号：US07957331B2
公开(公告)日：2011-06-07
申请号：US12170281
申请日：2008-07-09
申请人： Srinivas Kandala , John Kowalski , Yoshihiro Ohtani , Shugong Xu
发明人： Srinivas Kandala , John Kowalski , Yoshihiro Ohtani , Shugong Xu
IPC分类号： H04J3/00 , H04W4/00
CPC分类号： H04W74/06 , H04W24/00 , H04W52/0216 , H04W52/287 , H04W52/50 , H04W74/002 , H04W84/12 , Y02D70/142
摘要： A system and method are provided for controlling bandwidth allocation in a wireless local area network (wLAN). The method comprises: expressing device bandwidth allocations in terms of a time base; in response to expressing the bandwidth allocation in terms of a time base, monitoring network communications; and, measuring the allocated bandwidths. The method may further comprise: establishing polling schedules in response to expressing the bandwidth allocation in terms of a time base; and, de-energizing devices in response to the polling schedules. Expressing device bandwidth allocations in terms of a time base includes establishing: an inter-transmission opportunity (TXOP) interval; and, a TXOP jitter. These fields are supplied in the IEEE 802.11e transmit specification (TSPEC). Then, de-energizing devices in response to the polling schedule includes disengaging transmission and receiving functions in the minimum TXOP intervals between polling events, where the minimum TXOP interval is the inter-TXOP interval minus the TXOP jitter.
摘要翻译：提供了一种用于控制无线局域网（wLAN）中的带宽分配的系统和方法。该方法包括：以时基表示设备带宽分配; 响应于以时基表示带宽分配，监视网络通信; 并测量分配的带宽。该方法还可以包括：响应于以时基表示带宽分配来建立轮询时间表; 并且响应于轮询时间表而使装置断电。表示基于时基的设备带宽分配包括建立：传输间机会（TXOP）间隔; 和TXOP抖动。这些字段以IEEE 802.11e发送规范（TSPEC）提供。然后，响应于轮询时间表去激活装置包括在轮询事件之间的最小TXOP间隔中分离发送和接收功能，其中最小TXOP间隔是TXOP间隔减去TXOP抖动。

10. 发明授权

US07372855B2 System and method for synchronizing an IEEE 802.11 power-save interval 有权
标题翻译：用于同步IEEE 802.11省电间隔的系统和方法
公开(公告)号：US07372855B2
公开(公告)日：2008-05-13
申请号：US10648084
申请日：2003-08-26
申请人： Srinivas Kandala
发明人： Srinivas Kandala
IPC分类号： H04L12/28
CPC分类号： H04W52/0216 , H04L1/16 , H04L1/1685 , H04W84/12 , H04W88/08 , Y02D70/142 , Y02D70/23
摘要： A system and method are provided for coordinating a power-save interval in an IEEE 802.11 wireless network. The method transmits a first frame from an access point (AP) to a quality of service station (QSTA) and receives an acknowledgement from the QSTA. In response to receiving the acknowledgement, the first frame is retransmitted from the AP to the QSTA and the retransmitted first frame is identified as the last frame in the transmission queue. An acknowledgement is received responsive to the retransmitted first frame and the next minimum service interval is timed in response to the retransmitted first frame.
摘要翻译：提供了一种用于协调IEEE 802.11无线网络中的省电间隔的系统和方法。该方法将第一帧从接入点（AP）发送到服务质量站（QSTA），并从QSTA接收确认。响应于接收到确认，将第一帧从AP重传到QSTA，并且重发的第一帧被识别为传输队列中的最后一帧。响应于重传的第一帧接收确认，并且响应于重传的第一帧对下一个最小服务间隔进行定时。

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