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11.发明专利
公开(公告)号：JP2013258724A
公开(公告)日：2013-12-26
申请号：JP2013150978
申请日：2013-07-19
Applicant: Qualcomm Inc , クゥアルコム・インコーポレイテッドQualcomm Incorporated
Inventor： MANTRAVADI ASHOK , MALLADI DURGA PRASAD , AGRAWAL AVNEESH , ANASTASIOS STAMOULIS
CPC classification number: H04L25/0226 , H04L5/0007 , H04L5/0023 , H04L5/0048 , H04L5/0058 , H04L12/189 , H04L25/0232 , H04L27/2601 , H04W52/32
Abstract: PROBLEM TO BE SOLVED: To provide a method and apparatus for channel estimation in a system employing differing transmission protocols as broadcast/multicast and unicast protocols.SOLUTION: The number of pilot tones used for a broadcast transmission is greater than the number of pilot tones used for a unicast transmission. The channel estimation may be significantly degraded when a symbol from a broadcast transmission slot is adjacent to a symbol from a unicast transmission slot. Therefore, it is determined whether a first time slot of one transmission protocol (multicast slot) is adjacent to a second time slot of another transmission protocol (unicast slot). The pilot power and/or the number of the pilot sub-carriers are/is increased for the edge symbol of the multicast slot for purposes of channel estimation using the edge symbol.
Abstract translation: 要解决的问题：提供在采用不同传输协议作为广播/多播和单播协议的系统中的信道估计的方法和装置。解决方案：用于广播传输的导频音的数量大于使用的导频音数 用于单播传输。 当来自广播传输时隙的符号与来自单播传输时隙的符号相邻时，信道估计可能会显着恶化。 因此，确定一个传输协议（多播时隙）的第一时隙是否与另一传输协议（单播时隙）的第二时隙相邻。 为了使用边缘符号进行信道估计的目的，导频子载波的导频功率和/或导频子载波的数量增加用于多播时隙的边缘符号。
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12.发明专利Method and apparatus for communication in system employing different transmission protocols 有权在采用不同传输协议的系统中进行通信的方法和装置
公开(公告)号：JP2012257278A
公开(公告)日：2012-12-27
申请号：JP2012163836
申请日：2012-07-24
Applicant: Qualcomm Inc , クゥアルコム・インコーポレイテッドQualcomm Incorporated
Inventor： MANTRAVADI ASHOK , MALLADI DURGA PRASAD , AGRAWAL AVNEESH , ANASTASIOS STAMOULIS
CPC classification number: H04L25/0226 , H04L5/0007 , H04L5/0023 , H04L5/0048 , H04L5/0058 , H04L12/189 , H04L25/0232 , H04L27/2601 , H04W52/32
Abstract: PROBLEM TO BE SOLVED: To provide a method and apparatus for channel estimation in a system employing different transmission protocols such as a broadcast/multicast protocol and a unicast protocol.SOLUTION: When pilots of adjacent slots are used for channel estimation, quality of channel estimation deteriorates significantly. To solve the problem, it is determined whether a first time slot (multicast slot) of one transmission protocol is adjacent to a second time slot (unicast slot) of another transmission protocol (510); a symbol of an edge slot is determined (520); the pilot power and/or the number of pilot sub-carriers is increased (530); and channel estimation is performed using the edge symbol (540).
Abstract translation: 解决的问题：提供一种使用诸如广播/多播协议和单播协议之类的不同传输协议的系统中的信道估计的方法和装置。 解决方案：当相邻时隙的导频用于信道估计时，信道估计的质量显着下降。 为了解决该问题，确定一个传输协议的第一时隙（多播时隙）是否与另一个传输协议（510）的第二时隙（单播时隙）相邻; 确定边缘槽的符号（520）; 导频功率和/或导频子载波数量增加（530）; 并且使用边缘符号（540）来执行信道估计。 版权所有（C）2013，JPO＆INPIT
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公开(公告)号：JP2012165430A
公开(公告)日：2012-08-30
申请号：JP2012085644
申请日：2012-04-04
Applicant: Qualcomm Inc , クゥアルコム・インコーポレイテッドQualcomm Incorporated
Inventor： LIMBO LEE , MANTRAVADI ASHOK , FUYUNG LING , RAGHURAMAN KRISHNAMURTHY
CPC classification number: H04W72/005
Abstract: PROBLEM TO BE SOLVED: To provide systems and methods that facilitate monitoring RF channels in a wireless communication environment to determine whether one or more channels comprise a forward-link-only (FLO) signal.SOLUTION: A receiver can receive a first RF channel with an FLO signal and monitor other RF channels for FLO signals. Upon a determination that a monitored RF channel comprises the FLO signal, the receiver can switch between the first RF channel and the monitored RF channel. FLO signal detection can be performed using one or more of a wide-area identification display channel an energy detection protocol and a wide-area overhead information symbol decoding error detection protocol.
Abstract translation: 要解决的问题：提供便于在无线通信环境中监视RF信道以确定一个或多个信道是否包括仅前向链路（FLO）信号的系统和方法。 解决方案：接收机可以接收具有FLO信号的第一RF信道，并监视FLO信号的其他RF信道。 在确定被监视的RF信道包括FLO信号之后，接收机可以在第一RF信道和所监视的RF信道之间切换。 可以使用广域识别显示通道中的一个或多个能量检测协议和广域开销信息符号解码错误检测协议来执行FLO信号检测。 版权所有（C）2012，JPO＆INPIT
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公开(公告)号：JP2012054949A
公开(公告)日：2012-03-15
申请号：JP2011209385
申请日：2011-09-26
Applicant: Qualcomm Inc , クゥアルコム・インコーポレイテッドQualcomm Incorporated
Inventor： WANG MICHAEL MAO , VRCELJ BOJAN , KRISHNA KIRAN MUKKAVILLI , RAGHURAMAN KRISHNAMURTHY , MANTRAVADI ASHOK
CPC classification number: H04L27/2613 , H04L5/0007 , H04L5/0048 , H04L25/023
Abstract: PROBLEM TO BE SOLVED: To provide a system and a method for transmitting waveforms to aid channel estimation, timing synchronization, and AGC bootstrapping in a wireless network.SOLUTION: At least one TDM pilot symbol is inserted to a transition between wide area and local area waveforms to facilitate decoding of the transmission block.
Abstract translation: 要解决的问题：提供用于发送波形以辅助无线网络中的信道估计，定时同步和AGC自举的系统和方法。 解决方案：至少一个TDM导频符号插入广域和局域波形之间的转换，以便于传输块的解码。 版权所有（C）2012，JPO＆INPIT
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15.发明专利Coding and modulation for broadcast and multicast service in wireless communication system 有权无线通信系统中广播和多播服务的编码和调制
公开(公告)号：JP2011091817A
公开(公告)日：2011-05-06
申请号：JP2010250086
申请日：2010-11-08
Applicant: Qualcomm Inc , クゥアルコム・インコーポレイテッドQualcomm Incorporated
Inventor： AGRAWAL AVNEESH , MALLADI DURGA P , STAMOULIS ANASTASIOS , MANTRAVADI ASHOK , MURALI RAMASWAMY
CPC classification number: H04W88/10 , H04B7/2656 , H04L1/0083 , H04L5/14 , H04L27/2602 , H04W92/10 , Y02D70/00 , Y02D70/1222 , Y02D70/1242 , Y02D70/1244 , Y02D70/21 , Y02D70/449
Abstract: PROBLEM TO BE SOLVED: To provide a technique for transmitting variable transmission in a wireless communication system. SOLUTION: Physical channels to be sent in a super-frame are identified and allocated to time slots in the super-frame. The coding and modulation for each physical channel are selected based on its capacity. The data for each physical channel is selectively encoded based on an outer code rate, e.g., for a Reed-Solomon code, and further encoded based on an inner code rate, e.g., for a Turbo code. The encoded data for each physical channel is mapped to modulation symbols based on a selected modulation scheme. The modulation symbols for each physical channel are further processed (e.g., OFDM modulated) and multiplexed onto the time slots allocated to the physical channel. COPYRIGHT: (C)2011,JPO&INPIT
Abstract translation: 要解决的问题：提供一种用于在无线通信系统中发送可变传输的技术。 解决方案：在超帧中发送的物理信道被识别并分配给超帧中的时隙。 基于其容量来选择每个物理信道的编码和调制。 每个物理信道的数据基于例如用于里德 - 所罗门码的外部码率被选择性地编码，并且基于内部码率进一步编码，例如用于Turbo码。 基于所选择的调制方案将每个物理信道的编码数据映射到调制符号。 每个物理信道的调制符号被进一步处理（例如，OFDM调制）并被复用到分配给物理信道的时隙上。 版权所有（C）2011，JPO＆INPIT
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Patent Agency Ranking16.发明专利Staggered pilot transmission for channel estimation and time tracking 有权用于信道估计和时间跟踪的STAGGERED PILOT传输
公开(公告)号：JP2011066902A
公开(公告)日：2011-03-31
申请号：JP2010228508
申请日：2010-10-08
Applicant: Qualcomm Inc , クゥアルコム・インコーポレイテッドQualcomm Incorporated
Inventor： VIJAYAN RAJIV , MANTRAVADI ASHOK , MUKKAVILLI KRISHNA KIRAN
CPC classification number: H04L25/022 , H04L5/0048 , H04L23/02 , H04L25/0212 , H04L25/0228 , H04L27/2662 , H04L27/2695
Abstract: PROBLEM TO BE SOLVED: To allow a receiving entity to derive a longer channel estimate while limiting overhead.
SOLUTION: A transmitting entity transmits a pilot on different groups of subbands at different time intervals. N subbands in a system are arranged into M non-overlapping groups. The transmitting entity transmits the pilot on a different subband group in each time interval, and selects all M subband groups at M time intervals based on a pilot staggering pattern. A receiving entity derives an initial impulse response estimate with P channel taps based on the pilot received on one subband group and two longer impulse response estimates with different lengths used for data detection and time tracking.
COPYRIGHT: (C)2011,JPO&INPITAbstract translation: 要解决的问题：允许接收实体在限制开销的同时导出更长的信道估计。 解决方案：发送实体以不同的时间间隔在不同子带组上发送导频。 系统中的N个子带被布置成M个非重叠组。 发送实体在每个时间间隔中在不同的子带组上发送导频，并且基于导频交错模式以M个时间间隔选择所有M个子带组。 接收实体基于在一个子带组上接收的导频和用于数据检测和时间跟踪的不同长度的两个较长的脉冲响应估计，用P个信道抽头导出初始脉冲响应估计。 版权所有（C）2011，JPO＆INPIT
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17.发明专利Channel estimation for ofdm communication system with inactive subband 审中-公开用于具有不活动子载波的OFDM通信系统的信道估计
公开(公告)号：JP2011024227A
公开(公告)日：2011-02-03
申请号：JP2010181398
申请日：2010-08-13
Applicant: Qualcomm Inc , クゥアルコム・インコーポレイテッドQualcomm Incorporated
Inventor： MANTRAVADI ASHOK , KHANDEKAR AAMOD , TEAGUE EDWARD HARRISON , KADOUS TAMER
CPC classification number: H04L25/022 , H04L25/0218 , H04L25/0232
Abstract: PROBLEM TO BE SOLVED: To provide a method of estimating a channel for an OFDM communication system with inactive subbands. SOLUTION: For channel estimation in a spectrally shaped wireless communication system, an initial frequency response estimate is obtained for a first set of P uniformly spaced subbands (1) based on pilot symbols received on a second set of subbands used for pilot transmission and (2) using extrapolation and/or interpolation. In this case, P is a power of two. A final frequency response estimate for N total subbands is derived by (1) setting low quality taps for the channel impulse response estimate to zero, (2) zero-padding the channel impulse response estimate to length N, and (3) performing an N-point FFT on the zero-padded channel impulse response estimate. COPYRIGHT: (C)2011,JPO&INPIT
Abstract translation: 要解决的问题：提供一种估计具有无效子带的OFDM通信系统的信道的方法。 解决方案：对于频谱形状的无线通信系统中的信道估计，基于在用于导频传输的第二组子带上接收到的导频符号，为第一组P均匀间隔子带（1）获得初始频率响应估计 和（2）使用外插和/或插值。 在这种情况下，P是2的幂。 通过（1）将信道脉冲响应估计的低质量抽头设置为零，（2）将信道脉冲响应估计零填充到长度N，得到N个总子带的最终频率响应估计，以及（3）执行N 点零点填充信道脉冲响应估计。 版权所有（C）2011，JPO＆INPIT
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18.发明专利Local transmission and wide area transmission in wireless broadcast communication network 审中-公开无线广播通信网络中的本地传输和宽带传输
公开(公告)号：JP2010226734A
公开(公告)日：2010-10-07
申请号：JP2010098861
申请日：2010-04-22
Applicant: Qualcomm Inc , クゥアルコム・インコーポレイテッドQualcomm Incorporated
Inventor： MURALI RAMASWAMY , LING FUYUN , VIJAYAN RAJIV , WALKER KENT G , MANTRAVADI ASHOK , SUBRAMANIAM ANAND D
CPC classification number: H04L5/0041 , H04L5/0007 , H04L5/0044 , H04L5/0048 , H04L12/189 , H04W72/005
Abstract: PROBLEM TO BE SOLVED: To provide a method for performing local transmission and wide area transmission in a wireless broadcast communication network. SOLUTION: In order to perform broadcast communications of transmission of different type having a hierarchy with different communication-possible range in a wireless broadcast communication network, each base station processes data for the wide area transmission according to a first mode (or coding scheme and modulation scheme) (S812), and processes data for the local transmission according to a second mode (S813). Based on each desired communication-possible range for the wide area transmission and the local transmission, each of the first mode and the second mode is selected. In the same way, each base station multiplexes the data for the local transmission with the data for the wide area transmission without overlapping partially, and carries out broadcast communication for the multiplexed data. COPYRIGHT: (C)2011,JPO&INPIT
Abstract translation: 要解决的问题：提供一种用于在无线广播通信网络中执行本地传输和广域传输的方法。 解决方案：为了在无线广播通信网络中执行具有不同通信可能范围的层次的不同类型的传输的广播通信，每个基站根据第一模式（或编码）处理广域传输的数据 方案和调制方案）（S812），并根据第二模式处理本地传输的数据（S813）。 基于用于广域传输和本地传输的每个期望的通信可能范围，选择第一模式和第二模式中的每一个。 以相同的方式，每个基站将用于本地传输的数据与广域传输的数据进行多路复用，而不重叠，部分地进行多路复用数据的广播通信。 版权所有（C）2011，JPO＆INPIT
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19.发明专利Staggered pilot transmission for channel estimation and time tracking 有权用于信道估计和时间跟踪的STAGGERED PILOT传输
公开(公告)号：JP2010093827A
公开(公告)日：2010-04-22
申请号：JP2009256356
申请日：2009-11-09
Applicant: Qualcomm Inc , クゥアルコム・インコーポレイテッドQualcomm Incorporated
Inventor： VIJAYAN RAJIV , MANTRAVADI ASHOK , MUKKAVILLI KRISHNA KIRAN
CPC classification number: H04L25/022 , H04L5/0048 , H04L23/02 , H04L25/0212 , H04L25/0228 , H04L27/2662 , H04L27/2695
Abstract: PROBLEM TO BE SOLVED: To allow a receiving entity to derive a longer channel estimate while limiting overhead in an OFDM system.
SOLUTION: A pilot is transmitted on different groups of subbands at different time intervals. N subbands transmit pilots uniformly in M non-overlapping groups and on a different subband group in each time interval, and select all M subband groups at M time intervals. A receiving entity derives an initial impulse response estimate with P channel taps on the basis of the pilot received on one subband group and two longer impulse response estimates with different lengths used for data detection and time tracking. Each longer impulse response estimate may be derived by filtering initial impulse response estimates for a sufficient number of subband groups using a time-domain filter.
COPYRIGHT: (C)2010,JPO&INPITAbstract translation: 要解决的问题：允许接收实体在限制OFDM系统中的开销的同时导出较长的信道估计。 解决方案：以不同的时间间隔在不同的子带组上传送导频。 N个子带在M个非重叠组和每个时间间隔中的不同子带组上均匀地发送导频，并且以M个时间间隔选择所有M个子带组。 接收实体基于在一个子带组上接收的导频和用于数据检测和时间跟踪的不同长度的两个较长的脉冲响应估计，用P信道抽头导出初始脉冲响应估计。 可以通过使用时域滤波器对足够数量的子带组的初始脉冲响应估计进行滤波来导出更长的脉冲响应估计。 版权所有（C）2010，JPO＆INPIT
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公开(公告)号：ES2661226T3
公开(公告)日：2018-03-28
申请号：ES11764647
申请日：2011-09-22
Applicant: QUALCOMM INC
Inventor： KADOUS TAMER ADEL , HE XIAOYIN , DAYAL PRANAV , MANTRAVADI ASHOK , WANG JIBING
Abstract: Un procedimiento de comunicaciones inalámbricas, que comprende: determinar (1102) una métrica de rendimiento de una radio agresora (620a-n) y una métrica de rendimiento de una radio víctima (620a-n); establecer dinámicamente (1104) una potencia de transmisión máxima de la radio agresora (620a-n) basada en al menos una de la métrica de rendimiento de la radio víctima (620a-n) y la métrica de rendimiento de la radio agresora (620a-n) para cumplir con los criterios de rendimiento objetivos para la radio víctima (620a-n) y la radio agresora (620a-n); y enviar un informe de un espacio entre una potencia de transmisión actual del agresor y una potencia de transmisión máxima del agresor usada para controlar la potencia y la velocidad, basándose en la potencia de transmisión máxima del agresor.
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