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1. 发明申请

US20060279435A1 Uplink pilot and signaling transmission in wireless communication systems 有权
公开(公告)号：US20060279435A1
公开(公告)日：2006-12-14
申请号：US11418930
申请日：2006-05-04
申请人： Ranganathan Krishnan , Rajiv Vijayan , Tamer Kadous
发明人： Ranganathan Krishnan , Rajiv Vijayan , Tamer Kadous
IPC分类号： H03K17/94 , H03M11/00
CPC分类号： H04W74/004 , H04L5/0023 , H04L5/0041 , H04L5/0048 , H04L25/0204 , H04L25/022 , H04L25/0226 , H04L25/0232 , H04L25/0248 , H04W52/325 , H04W72/0413
摘要： Techniques to more efficiently transmit pilot and signaling on the uplink in an OFDM system. With subband multiplexing, M usable subbands in the system are partitioned into Q disjoint groups of subbands. Each subband group may be assigned to a different terminal for uplink pilot transmission. Multiple terminals may transmit simultaneously on their assigned subbands. The transmit power for the pilot may be scaled higher to attain the same total pilot energy even though S instead of M subbands are used for pilot transmission by each terminal. Pilot transmissions from the terminals are received, and a channel estimate is derived for each terminal based on the pilot received on the assigned subbands. The channel estimate comprises a response for additional subbands not included in the assigned group. Subband multiplexing may also be used for uplink signaling transmission.

2. 发明授权

US06928062B2 Uplink pilot and signaling transmission in wireless communication systems 有权
公开(公告)号：US06928062B2
公开(公告)日：2005-08-09
申请号：US10340507
申请日：2003-01-10
申请人： Ranganathan Krishnan , Rajiv Vijayan , Tamer Kadous
发明人： Ranganathan Krishnan , Rajiv Vijayan , Tamer Kadous
IPC分类号： H04B7/005 , H04L25/02 , H04W52/24 , H04W52/32 , H04W52/34 , H04W52/42 , H04Q7/00
CPC分类号： H04W52/325 , H04L1/0004 , H04L1/1614 , H04L5/0007 , H04L5/0032 , H04L5/0041 , H04L5/005 , H04L5/0053 , H04L25/0212 , H04L25/022 , H04L25/023 , H04L25/03821 , H04L27/2607 , H04L27/2657 , H04L27/2662 , H04W52/225 , H04W52/346 , H04W52/42
摘要： Techniques to more efficiently transmit pilot and signaling on the uplink in an OFDM system. With subband multiplexing, M usable subbands in the system are partitioned into Q disjoint groups of subbands. Each subband group may be assigned to a different terminal for uplink pilot transmission. Multiple terminals may transmit simultaneously on their assigned subbands. The transmit power for the pilot may be scaled higher to attain the same total pilot energy even though S instead of M subbands are used for pilot transmission by each terminal. Pilot transmissions from the terminals are received, and a channel estimate is derived for each terminal based on the pilot received on the assigned subbands. The channel estimate comprises a response for additional subbands not included in the assigned group. Subband multiplexing may also be used for uplink signaling transmission.

3. 发明授权

US08724555B2 Uplink pilot and signaling transmission in wireless communication systems 有权
标题翻译：无线通信系统中的上行链路导频和信令传输
公开(公告)号：US08724555B2
公开(公告)日：2014-05-13
申请号：US11418930
申请日：2006-05-04
申请人： Ranganathan Krishnan , Rajiv Vijayan , Tamer Kadous
发明人： Ranganathan Krishnan , Rajiv Vijayan , Tamer Kadous
IPC分类号： H04W4/00 , H04J11/00 , H04W74/00 , H04W72/04
CPC分类号： H04W74/004 , H04L5/0023 , H04L5/0041 , H04L5/0048 , H04L25/0204 , H04L25/022 , H04L25/0226 , H04L25/0232 , H04L25/0248 , H04W52/325 , H04W72/0413
摘要： Techniques to more efficiently transmit pilot and signaling on the uplink in an OFDM system. With subband multiplexing, M usable subbands in the system are partitioned into Q disjoint groups of subbands. Each subband group may be assigned to a different terminal for uplink pilot transmission. Multiple terminals may transmit simultaneously on their assigned subbands. The transmit power for the pilot may be scaled higher to attain the same total pilot energy even though S instead of M subbands are used for pilot transmission by each terminal. Pilot transmissions from the terminals are received, and a channel estimate is derived for each terminal based on the pilot received on the assigned subbands. The channel estimate comprises a response for additional subbands not included in the assigned group. Subband multiplexing may also be used for uplink signaling transmission.
摘要翻译：在OFDM系统中在上行链路上更有效地发送导频和信令的技术。通过子带复用，系统中的M个可用子带被划分成Q个不相关的子带组。每个子带组可被分配给用于上行链路导频传输的不同终端。多个终端可以在其分配的子带上同时发送。即使S代替M个子带用于每个终端的导频传输，导频的发射功率也可以按比例更高以获得相同的总导频能量。接收来自终端的导频传输，并且基于在所分配的子带上接收到的导频，为每个终端导出信道估计。信道估计包括对未分配组中的附加子带的响应。子带复用也可以用于上行链路信令传输。

4. 发明授权

US07042857B2 Uplink pilot and signaling transmission in wireless communication systems 有权
公开(公告)号：US07042857B2
公开(公告)日：2006-05-09
申请号：US11138824
申请日：2005-05-25
申请人： Ranganathan Krishnan , Rajiv Vijayan , Tamer Kadous
发明人： Ranganathan Krishnan , Rajiv Vijayan , Tamer Kadous
IPC分类号： H04Q7/00
CPC分类号： H04W74/004 , H04L5/0023 , H04L5/0041 , H04L5/0048 , H04L25/0204 , H04L25/022 , H04L25/0226 , H04L25/0232 , H04L25/0248 , H04W52/325 , H04W72/0413
摘要： Techniques to more efficiently transmit pilot and signaling on the uplink in an OFDM system. With subband multiplexing, M usable subbands in the system are partitioned into Q disjoint groups of subbands. Each subband group may be assigned to a different terminal for uplink pilot transmission. Multiple terminals may transmit simultaneously on their assigned subbands. The transmit power for the pilot may be scaled higher to attain the same total pilot energy even though S instead of M subbands are used for pilot transmission by each terminal. Pilot transmissions from the terminals are received, and a channel estimate is derived for each terminal based on the pilot received on the assigned subbands. The channel estimate comprises a response for additional subbands not included in the assigned group. Subband multiplexing may also be used for uplink signaling transmission.

5. 发明申请

US20050215251A1 Uplink pilot and signaling transmission in wireless communication systems 有权
标题翻译：无线通信系统中的上行链路导频和信令传输
公开(公告)号：US20050215251A1
公开(公告)日：2005-09-29
申请号：US11138824
申请日：2005-05-25
申请人： Ranganathan Krishnan , Rajiv Vijayan , Tamer Kadous
发明人： Ranganathan Krishnan , Rajiv Vijayan , Tamer Kadous
IPC分类号： H04B7/005 , H04L5/02 , H04L27/26 , H04W52/32 , H04Q7/20
CPC分类号： H04W74/004 , H04L5/0023 , H04L5/0041 , H04L5/0048 , H04L25/0204 , H04L25/022 , H04L25/0226 , H04L25/0232 , H04L25/0248 , H04W52/325 , H04W72/0413
摘要： Techniques to more efficiently transmit pilot and signaling on the uplink in an OFDM system. With subband multiplexing, M usable subbands in the system are partitioned into Q disjoint groups of subbands. Each subband group may be assigned to a different terminal for uplink pilot transmission. Multiple terminals may transmit simultaneously on their assigned subbands. The transmit power for the pilot may be scaled higher to attain the same total pilot energy even though S instead of M subbands are used for pilot transmission by each terminal. Pilot transmissions from the terminals are received, and a channel estimate is derived for each terminal based on the pilot received on the assigned subbands. The channel estimate comprises a response for additional subbands not included in the assigned group. Subband multiplexing may also be used for uplink signaling transmission.
摘要翻译：在OFDM系统中在上行链路上更有效地发送导频和信令的技术。通过子带复用，系统中的M个可用子带被划分成Q个不相关的子带组。每个子带组可被分配给用于上行链路导频传输的不同终端。多个终端可以在其分配的子带上同时发送。即使S代替M个子带用于每个终端的导频传输，导频的发射功率也可以按比例更高以获得相同的总导频能量。接收来自终端的导频传输，并且基于在所分配的子带上接收到的导频，为每个终端导出信道估计。信道估计包括对未分配组中的附加子带的响应。子带复用也可以用于上行链路信令传输。

6. 发明授权

US07463576B2 Channel estimation for OFDM communication systems 有权
标题翻译： OFDM通信系统的信道估计
公开(公告)号：US07463576B2
公开(公告)日：2008-12-09
申请号：US11101908
申请日：2005-04-07
申请人： Ranganathan Krishnan , Tamer Kadous
发明人： Ranganathan Krishnan , Tamer Kadous
IPC分类号： H04J11/00
CPC分类号： H04W52/325 , H04L25/0212 , H04L25/022 , H04L25/023 , H04W52/24 , H04W52/34 , H04W52/42
摘要： Techniques to estimate the frequency response of a wireless channel in an OFDM system. In one method, an initial estimate of the frequency response of the wireless channel is obtained for a first group of subbands based on a pilot transmission received via the subbands in the first group. An estimate of the impulse response of the wireless channel is then derived based on the initial frequency response estimate. An enhanced estimate of the frequency response of the wireless channel is then derived for a second group of subbands based on the impulse response estimate. The first and second groups may each include all or only a subset of the usable subbands. Subband multiplexing may be used to allow simultaneous pilot transmissions by multiple terminals on their associated groups of subbands.
摘要翻译：估计OFDM系统中无线信道的频率响应的技术。在一种方法中，基于经由第一组中的子带接收的导频传输，针对第一组子带获得无线信道的频率响应的初始估计。然后基于初始频率响应估计推导出无线信道的脉冲响应的估计。然后基于脉冲响应估计对第二组子带导出对无线信道的频率响应的增强估计。第一组和第二组可以各自包括全部或仅一个可用子带的子集。子带复用可用于允许在其相关联的子带组上的多个终端的同时导频传输。

7. 发明申请

US20100003931A1 TRANSMISSION SCHEMES FOR MULTI-ANTENNA COMMUNICATION SYSTEMS UTILIZING MULTI-CARRIER MODULATION 审中-公开
标题翻译：使用多载波调制的多天线通信系统的传输方案
公开(公告)号：US20100003931A1
公开(公告)日：2010-01-07
申请号：US12558073
申请日：2009-09-11
申请人： Ranganathan Krishnan , Anand D. Subramaniam , Tamer Kadous
发明人： Ranganathan Krishnan , Anand D. Subramaniam , Tamer Kadous
IPC分类号： H04B7/02
CPC分类号： H04W52/42 , H04B7/0667 , H04L5/0023 , H04L5/0048
摘要： Pilot and data transmission schemes for multi-antenna communication systems utilizing multi-carrier modulation are provided. Subband multiplexing is used to avoid interference resulting from transmitting multiple signals simultaneously from multiple antennas. M usable subbands are initially arranged to form multiple groups of subbands, with each group including a different subset of the usable subbands. Each of T transmit antennas is then assigned one or possibly more subband groups for pilot transmission and typically one subband group for data transmission. Pilot and data may then be transmitted from each antenna on the subbands assigned to that antenna for pilot and data transmission. For each transmit antenna, the transmit power for each assigned subband may be scaled higher such that all of the total transmit power available for the antenna is used for transmission. Pilot and/or data may be transmitted simultaneously from all T antennas on all usable subbands without causing mutual interference.
摘要翻译：提供了利用多载波调制的多天线通信系统的导频和数据传输方案。使用子带复用来避免从多个天线同时发送多个信号导致的干扰。 M个可用的子带最初被布置成形成多个子带组，每组包括可用子带的不同子集。每个T发射天线然后被分配一个或可能更多的子带组用于导频传输，并且通常用于一个子带组用于数据传输。然后可以从分配给该天线的子带上的每个天线发送导频和数据用于导频和数据传输。对于每个发射天线，每个分配的子带的发射功率可以被缩放更高，使得可用于天线的全部发射功率被用于传输。导频和/或数据可以在所有可用子带上从所有T个天线同时传输而不引起相互干扰。

8. 发明申请

US20060269009A1 Transmission schemes for multi-antenna communication systems utilizing multi-carrier modulation 有权
公开(公告)号：US20060269009A1
公开(公告)日：2006-11-30
申请号：US11501130
申请日：2006-08-07
申请人： Ranganathan Krishnan , Anand Subramaniam , Tamer Kadous
发明人： Ranganathan Krishnan , Anand Subramaniam , Tamer Kadous
IPC分类号： H04K1/10 , H04L1/02
CPC分类号： H04W52/42 , H04B7/0667 , H04L5/0023 , H04L5/0048
摘要： Pilot and data transmission schemes for multi-antenna communication systems utilizing multi-carrier modulation are provided. Subband multiplexing is used to avoid interference resulting from transmitting multiple signals simultaneously from multiple antennas. M usable subbands are initially arranged to form multiple groups of subbands, with each group including a different subset of the usable subbands. Each of T transmit antennas is then assigned one or possibly more subband groups for pilot transmission and typically one subband group for data transmission. Pilot and data may then be transmitted from each antenna on the subbands assigned to that antenna for pilot and data transmission. For each transmit antenna, the transmit power for each assigned subband may be scaled higher such that all of the total transmit power available for the antenna is used for transmission. Pilot and/or data may be transmitted simultaneously from all T antennas on all usable subbands without causing mutual interference.

9. 发明授权

US07095790B2 Transmission schemes for multi-antenna communication systems utilizing multi-carrier modulation 有权
公开(公告)号：US07095790B2
公开(公告)日：2006-08-22
申请号：US10375191
申请日：2003-02-25
申请人： Ranganathan Krishnan , Anand D. Subramaniam , Tamer Kadous
发明人： Ranganathan Krishnan , Anand D. Subramaniam , Tamer Kadous
IPC分类号： H04K1/10 , H04J11/00
CPC分类号： H04W52/42 , H04B7/0667 , H04L5/0023 , H04L5/0048
摘要： Pilot and data transmission schemes for multi-antenna communication systems utilizing multi-carrier modulation are provided. Subband multiplexing is used to avoid interference resulting from transmitting multiple signals simultaneously from multiple antennas. M usable subbands are initially arranged to form multiple groups of subbands, with each group including a different subset of the usable subbands. Each of T transmit antennas is then assigned one or possibly more subband groups for pilot transmission and typically one subband group for data transmission. Pilot and data may then be transmitted from each antenna on the subbands assigned to that antenna for pilot and data transmission. For each transmit antenna, the transmit power for each assigned subband may be scaled higher such that all of the total transmit power available for the antenna is used for transmission. Pilot and/or data may be transmitted simultaneously from all T antennas on all usable subbands without causing mutual interference.

10. 发明授权

US07606326B2 Transmission schemes for multi-antenna communication systems utilizing multi-carrier modulation 有权
标题翻译：利用多载波调制的多天线通信系统的传输方案
公开(公告)号：US07606326B2
公开(公告)日：2009-10-20
申请号：US11501130
申请日：2006-08-07
申请人： Ranganathan Krishnan , Anand D. Subramaniam , Tamer Kadous
发明人： Ranganathan Krishnan , Anand D. Subramaniam , Tamer Kadous
IPC分类号： H04B7/06 , H04B7/02
CPC分类号： H04W52/42 , H04B7/0667 , H04L5/0023 , H04L5/0048
摘要： Pilot and data transmission schemes for multi-antenna communication systems utilizing multi-carrier modulation are provided. Subband multiplexing is used to avoid interference resulting from transmitting multiple signals simultaneously from multiple antennas. M usable subbands are initially arranged to form multiple groups of subbands, with each group including a different subset of the usable subbands. Each of T transmit antennas is then assigned one or possibly more subband groups for pilot transmission and typically one subband group for data transmission. Pilot and data may then be transmitted from each antenna on the subbands assigned to that antenna for pilot and data transmission. For each transmit antenna, the transmit power for each assigned subband may be scaled higher such that all of the total transmit power available for the antenna is used for transmission. Pilot and/or data may be transmitted simultaneously from all T antennas on all usable subbands without causing mutual interference.
摘要翻译：提供了利用多载波调制的多天线通信系统的导频和数据传输方案。使用子带复用来避免从多个天线同时发送多个信号导致的干扰。 M个可用的子带最初被布置成形成多个子带组，每组包括可用子带的不同子集。然后，每个T发射天线被分配一个或可能更多的子带组用于导频传输，并且通常用于数据传输的一个子带组。然后可以从分配给该天线的子带上的每个天线发送导频和数据用于导频和数据传输。对于每个发射天线，每个分配的子带的发射功率可以被缩放更高，使得可用于天线的全部发射功率被用于传输。导频和/或数据可以在所有可用子带上从所有T个天线同时传输而不引起相互干扰。

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