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1. 发明授权

US5481571A Method and apparatus for switching between radio frequency circuits 失效
标题翻译：用于在射频电路之间切换的方法和装置
公开(公告)号：US5481571A
公开(公告)日：1996-01-02
申请号：US150728
申请日：1993-11-12
申请人： Kumar Balachandran , Roy F. Quick, Jr.
发明人： Kumar Balachandran , Roy F. Quick, Jr.
IPC分类号： H04B7/08 , H04Q7/22 , H04B17/02
CPC分类号： H04B7/0814
摘要： An RF circuit switch system having particular use in an antenna diversity scheme for a CDPD system relies upon a comparison between current signal values on a selected antenna and a predetermined value based upon previous signal values measured on the same antenna. This comparison determines whether switching will occur from one antenna to another. Normally, the predetermined value will be adjusted based upon present signal strength on the selected antenna. Switching is normally attempted when there is a drop of approximately 10 dB in the signal strength of the selected antenna. If the signal strength in the other antenna is found to be less than that of the original antenna upon switching, an automatic switch back is carried out.
摘要翻译：在用于CDPD系统的天线分集方案中特别有用的RF电路开关系统依赖于基于在同一天线上测量的先前信号值在选定天线上的电流信号值与预定值之间的比较。该比较确定是否从一个天线到另一个天线发生切换。通常，将基于所选天线上的当前信号强度来调整预定值。当所选天线的信号强度下降约10dB时，通常会尝试切换。如果在切换时发现另一天线的信号强度小于原始天线的信号强度，则执行自动切换。

2. 发明授权

US5544222A Cellular digtial packet data mobile data base station 失效
标题翻译：蜂窝数字分组数据移动数据基站
公开(公告)号：US5544222A
公开(公告)日：1996-08-06
申请号：US152005
申请日：1993-11-12
申请人： Mark T. Robinson , Steven H. Gardner , Matt Wong , Seton P. Kasmir , Kumar Balachandran , Sue Graham , Gail Schjelderup , Roy F. Quick, Jr.
发明人： Mark T. Robinson , Steven H. Gardner , Matt Wong , Seton P. Kasmir , Kumar Balachandran , Sue Graham , Gail Schjelderup , Roy F. Quick, Jr.
IPC分类号： H04W48/08 , H04W72/02 , H04W88/10 , H04Q7/30 , H04Q7/20
CPC分类号： H04W88/10 , H04W48/08 , H04W72/02
摘要： A cellular digital packet data (CDPD) system includes a mobile data base station (MDBS) configured to interface easily with an advanced mobile phone system (AMPS). The elements of the MDBS are arranged on modules and the functionality of the MDBS is divided among the modules to facilitate flexibility, compactness and quick expansion of the MDBS. To further facilitate compactness, the MDBS includes a transceiver/modem board which uses a single chip to carry out delta-sigma modulation. In order to maintain the integrity of CDPD transmission, a channel hopping scheme is used based upon avoidance of AMPS channel use. A distinctive protocol is used to encapsulate control/query/response data for transmission throughout the CDPD system. This protocol also facilitates easy control of each MDBS throughout the system.
摘要翻译：蜂窝数字分组数据（CDPD）系统包括配置成与高级移动电话系统（AMPS）轻松接口的移动数据基站（MDBS）。 MDBS的元素安排在模块上，MDBS的功能在模块之间划分，以促进MDBS的灵活性，紧凑性和快速扩展。为了进一步促进紧凑性，MDBS包括使用单个芯片进行Δ-Σ调制的收发机/调制解调器板。为了保持CDPD传输的完整性，基于避免AMPS信道使用，使用信道跳频方案。一种独特的协议用于封装控制/查询/响应数据，以便在整个CDPD系统中进行传输。该协议还有助于在整个系统中容易地控制每个MDBS。

3. 发明授权

US09538546B2 Processing-time dependent control of data block transmission 有权
标题翻译：数据块传输的处理时间依赖控制
公开(公告)号：US09538546B2
公开(公告)日：2017-01-03
申请号：US14380089
申请日：2012-02-21
申请人： Joachim Sachs , Kumar Balachandran , Konstantinos Dimou , Erik Eriksson , Michael Meyer , Johan Rune , Anders Wallén , Henning Wiemann , Leif Wilhelmsson
发明人： Joachim Sachs , Kumar Balachandran , Konstantinos Dimou , Erik Eriksson , Michael Meyer , Johan Rune , Anders Wallén , Henning Wiemann , Leif Wilhelmsson
IPC分类号： H04W72/12 , H04W52/02
CPC分类号： H04W72/1205 , H04W52/0216 , H04W72/12 , Y02D70/1242 , Y02D70/1262 , Y02D70/21
摘要： A node (100; 300) of a mobile network is responsible for scheduling transmissions of data blocks between the mobile network and a terminal device (200, 200′). The node (100; 300) may for example be a base station (100) or a control node (300) of the mobile network. The node (100; 300) determines a processing time required by the terminal device (200; 200′) for processing signals for transmission of one of the data blocks. The processing time is determined from a plurality of supported processing times. On the basis of the determined processing time, the node (100; 300) schedules the transmission of the data block. The terminal device (200, 200′) may provide control data for determining the processing time to the node (100; 300).
摘要翻译：移动网络的节点（100; 300）负责调度移动网络和终端设备（200,200'）之间的数据块的传输。节点（100; 300）可以例如是移动网络的基站（100）或控制节点（300）。节点（100; 300）确定终端设备（200; 200'）所需的用于处理用于发送数据块之一的信号的处理时间。处理时间由多个支持的处理时间确定。在确定的处理时间的基础上，节点（100; 300）调度数据块的传输。终端设备（200,200'）可以提供用于确定到节点（100; 300）的处理时间的控制数据。

4. 发明授权

US08538464B2 Code word assignment methods for quick paging in telecommunication systems 有权
标题翻译：电信系统快速寻呼的码字分配方法
公开(公告)号：US08538464B2
公开(公告)日：2013-09-17
申请号：US12346286
申请日：2008-12-30
申请人： Rajaram Ramesh , Havish Koorapaty , Kumar Balachandran
发明人： Rajaram Ramesh , Havish Koorapaty , Kumar Balachandran
IPC分类号： H04W68/00
CPC分类号： H04W68/02 , H04W4/08 , H04W72/0466
摘要： Code words are assigned to subscriber stations or groups of subscriber stations in a communication network for a quick paging mechanism in which the assigned code words are transmitted as quick paging signals over unused frequency resources to signal the subscriber stations. Subsets of multiple code words from a set of code words can be assigned to respective paging groups, and overlapping subsets can be assigned to multiple paging groups. This enables a single code word to be used to address either a single paging group or multiple paging groups.
摘要翻译：代码字被分配给通信网络中的订户站或用户站组，用于快速寻呼机制，其中分配的码字作为快速寻呼信号在未使用的频率资源上发送，以向用户台发信号。可以将来自一组码字的多个码字的子集分配给各个寻呼组，并且可以将重叠的子集分配给多个寻呼组。这使得能够使用单个代码字来寻址单个寻呼组或多个寻呼组。

5. 发明授权

US08526891B2 System and apparatus for interference suppression using macrodiversity in mobile wireless networks 有权
公开(公告)号：US08526891B2
公开(公告)日：2013-09-03
申请号：US13162044
申请日：2011-06-16
申请人： Kumar Balachandran , Leonid Krasny
发明人： Kumar Balachandran , Leonid Krasny
IPC分类号： H04B1/00 , H04B7/00
CPC分类号： H04B7/024 , H04B7/022 , H04B7/0408 , H04B7/0617 , H04B7/0626 , H04B7/063 , H04B7/0663 , H04L1/0026 , H04L1/0029 , H04L1/0693 , H04L25/0216 , H04L25/03343 , H04W16/28 , H04W28/18 , H04W52/143 , H04W52/367 , H04W52/40 , H04W92/20
摘要： In a wireless network, plural downlink signals from plural base stations are transmitted to a terminal. The plural downlink signals all carry the same information to the terminal. The terminal provides feedback on the downlink channels. The feedback provides information on the taps of the channels. The amount of information fed back is constrained. Based on the feedback, transmission parameters of the downlink signals are adjusted. The process of transmitting, providing feedback, and adjusting the parameters continue so that the energy of the downlink signal is enhanced at the terminal location and suppressed elsewhere. Beam forming can be used to further suppress the energy signature at locations other than the terminal location.

6. 发明申请

US20130170572A1 Mobility-Resilient Multi-Antenna Communications 有权
标题翻译：移动弹性多天线通信
公开(公告)号：US20130170572A1
公开(公告)日：2013-07-04
申请号：US13339971
申请日：2011-12-29
申请人： Henrik Asplund , Kumar Balachandran , Yngve Selén
发明人： Henrik Asplund , Kumar Balachandran , Yngve Selén
IPC分类号： H04B7/02
CPC分类号： H04B7/0456 , H04B7/0617 , H04B7/0619 , H04B7/0658
摘要： The antenna weight selection solution disclosed herein selects antenna weights for a multiple antenna communication system that transmits uplink or downlink data using multiple radiation patterns based on channel variability metrics determined for two or more sets of candidate antenna weights. In so doing the antenna weight selection solution disclosed herein reduces the channel variability associated with data transmissions, and therefore reduces the amount of feedback and/or the feedback rates required for the multiple antenna communication system.
摘要翻译：本文公开的天线权重选择解决方案基于为两个或更多个候选天线权重组确定的信道变异性度量，选择使用多个辐射模式发送上行链路或下行链路数据的多天线通信系统的天线权重。在这样做时，本文公开的天线权重选择解决方案减少了与数据传输相关联的信道变异性，因此减少了多天线通信系统所需的反馈量和/或反馈速率。

7. 发明申请

US20130077658A1 SPATIALLY RANDOMIZED PILOT SYMBOL TRANSMISSION METHODS, SYSTEMS AND DEVICES FOR MULTIPLE INPUT/MULTIPLE OUTPUT (MIMO) WIRELESS COMMUNICATIONS 有权
标题翻译：用于多输入/多输出（MIMO）无线通信的空间引导符号传输方法，系统和设备
公开(公告)号：US20130077658A1
公开(公告)日：2013-03-28
申请号：US13247597
申请日：2011-09-28
申请人： Dennis Hui , Kumar Balachandran , Jung-Fu Cheng , Jiann-Ching Guey
发明人： Dennis Hui , Kumar Balachandran , Jung-Fu Cheng , Jiann-Ching Guey
IPC分类号： H04L27/28 , H04B1/38 , H04L27/00
CPC分类号： H04B7/0413 , H04B7/0615 , H04B7/0686 , H04L5/0023 , H04L5/005 , H04L25/0204 , H04L25/0226 , H04L2025/03426
摘要： Compressive sampling is used to generate pilot symbols to be transmitted over an array of antennas in a MIMO wireless communications device. A pilot symbol is transmitted over the array of antennas according to a spatially randomized antenna transmission function that randomly changes across the array of antennas. The randomized antenna transmission function may randomly select/deselect antennas and/or randomly change amplitude and/or phase of the pilot symbol transmission. Channel estimates can be constructed at a receiver based on the spatially randomized pilot symbols that were transmitted.
摘要翻译：压缩采样用于生成将在MIMO无线通信设备中通过天线阵列传输的导频符号。根据在天线阵列上随机变化的空间随机天线传输功能，在天线阵列上传输导频符号。随机天线发送功能可以随机地选择/取消选择天线和/或随机地改变导频符号传输的幅度和/或相位。可以基于发送的空间随机化导频符号在接收机处构造信道估计。

8. 发明授权

US08144720B2 Uplink radio resource allocation in the presence of power limited users 有权
标题翻译：在电力限制用户面前上行无线电资源分配
公开(公告)号：US08144720B2
公开(公告)日：2012-03-27
申请号：US12429468
申请日：2009-04-24
申请人： Havish Koorapaty , Rajaram Ramesh , Kumar Balachandran
发明人： Havish Koorapaty , Rajaram Ramesh , Kumar Balachandran
IPC分类号： H04Q11/02
CPC分类号： H04L49/9094 , H04L1/0003 , H04L1/0009 , H04L5/0007 , H04L5/0042 , H04L5/0046 , H04L5/006 , H04L43/0894 , H04L43/16 , H04L47/70 , H04L47/74 , H04L47/781 , H04W28/065 , H04W28/22 , H04W72/044 , H04W72/048 , H04W72/12 , Y02D70/146
摘要： A base station in an OFDMA system which determines a modulation and coding scheme to use for a packet of a certain size to be transmitted by a Mobile Station. The base station schedules transmissions by mobile stations and transmits packets. The base station includes a processing unit which determines a number of time-frequency resources required to transmit the packet for a modulation and coding scheme, determines an SINR based on the number of time-frequency resources used and available power at the mobile station, determines a transmission rate as a ratio of the packet size transmitted to the number of time-frequency resources used, sets a rate to zero if the determined SINR is lower than a threshold SINR required for the modulation and coding scheme, and selects the modulation and coding scheme with a highest transmission rate. The base station includes a memory storing modulation and coding schemes.
摘要翻译： OFDMA系统中的基站，其确定用于要由移动站发送的一定大小的分组的调制和编码方案。基站调度移动台的传输并发送分组。基站包括：处理单元，其确定用于调制和编码方案发送分组所需的时间频率资源的数量;基于所使用的时间频率资源的数量和移动站的可用功率来确定SINR，确定如果发送的分组大小与使用的时间 - 频率资源的数量的比率的传输速率，则如果确定的SINR低于调制和编码方案所需的阈值SINR，则将速率设置为零，并且选择调制和编码传输速率最高的方案。基站包括存储调制和编码方案的存储器。

9. 发明授权

US07983623B2 System and apparatus for interference suppression using macrodiversity in mobile wireless networks 有权
标题翻译：用于移动无线网络中使用宏分集的干扰抑制的系统和装置
公开(公告)号：US07983623B2
公开(公告)日：2011-07-19
申请号：US12129918
申请日：2008-05-30
申请人： Kumar Balachandran , Leonid Krasny
发明人： Kumar Balachandran , Leonid Krasny
IPC分类号： H04B1/00 , H04B7/00
CPC分类号： H04B7/024 , H04B7/022 , H04B7/0408 , H04B7/0617 , H04B7/0626 , H04B7/063 , H04B7/0663 , H04L1/0026 , H04L1/0029 , H04L1/0693 , H04L25/0216 , H04L25/03343 , H04W16/28 , H04W28/18 , H04W52/143 , H04W52/367 , H04W52/40 , H04W92/20
摘要： In a wireless network, plural downlink signals from plural base stations are transmitted to a terminal. The plural downlink signals all carry the same information to the terminal. The terminal provides feedback on the downlink channels. The feedback provides information on the taps of the channels. The amount of information fed back is constrained. Based on the feedback, transmission parameters of the downlink signals are adjusted. The process of transmitting, providing feedback, and adjusting the parameters continue so that the energy of the downlink signal is enhanced at the terminal location and suppressed elsewhere. Beam forming can be used to further suppress the energy signature at locations other than the terminal location.
摘要翻译：在无线网络中，来自多个基站的多个下行链路信号被发送到终端。多个下行链路信号都携带相同的信息给终端。终端提供对下行链路信道的反馈。反馈提供有关通道的抽头的信息。反馈的信息量受到限制。基于反馈，调整下行链路信号的传输参数。发送，提供反馈和调整参数的过程继续进行，使得下行链路信号的能量在终端位置得到增强，并在其他地方被抑制。波束形成可用于进一步抑制终端位置之外的位置处的能量特征。

10. 发明授权

US07796698B2 Interference suppression in a multicarrier receiver 有权
标题翻译：多载波接收机中的干扰抑制
公开(公告)号：US07796698B2
公开(公告)日：2010-09-14
申请号：US11757731
申请日：2007-06-04
申请人： Havish Koorapaty , Rajaram Ramesh , Kumar Balachandran
发明人： Havish Koorapaty , Rajaram Ramesh , Kumar Balachandran
IPC分类号： H04K1/10 , H04Q7/20
CPC分类号： H04L27/2647 , H04L5/0048 , H04L25/0228
摘要： A receiver uses knowledge of pilot symbols transmitted by a neighboring sector to reduce interference in a received data symbol. The received data symbol is transmitted on one or more data subcarriers in a first sector. Overlapping pilot symbols transmitted on overlapping pilot carriers in a second sector are determined and used to generate channel estimates for the overlapping pilot carriers. The overlapping pilot symbols and pilot channel estimates are then used to reduce interference in the received data symbol.
摘要翻译：接收机使用由相邻扇区发送的导频符号的知识来减少接收的数据符号中的干扰。所接收的数据符号在第一扇区中的一个或多个数据子载波上发送。确定在第二扇区中的重叠导频载波上发送的重叠导频符号，并用于生成重叠导频载波的信道估计。然后使用重叠导频符号和导频信道估计来减少接收到的数据符号中的干扰。

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