-
公开(公告)号：US20060013325A1
公开(公告)日：2006-01-19
申请号：US11144181
申请日：2005-06-02
CPC分类号： H04W88/10 , H04B7/2656 , H04L1/0083 , H04L5/14 , H04L27/2602 , H04W92/10 , Y02D70/1222 , Y02D70/1242 , Y02D70/1244 , Y02D70/21 , Y02D70/449
摘要： To transmit data in a manner to mitigate the deleterious effects of delay spread, the expected coverage areas for multiple transmissions to be sent in multiple time slots are initially determined. Cyclic prefix lengths for these transmissions are selected based on the expected coverage areas. The cyclic prefix length for each transmission may be selected from among a set of allowed cyclic prefix lengths based on the expected coverage area for that transmission, the pilot staggering used for the transmission, and so on. For example, a shorter cyclic prefix length may be selected for each local transmission, and a longer cyclic prefix length may be selected for each wide-area transmission. The selected cyclic prefix lengths may be signaled to the terminals. The transmissions are processed (e.g., OFDM modulated) based on the selected cyclic prefix lengths. The cyclic prefix lengths may be selected periodically, e.g., in each super-frame.
-
2.发明申请Frame structures for a wireless communication system with multiple radio technologies 有权具有多种无线电技术的无线通信系统的帧结构公开(公告)号：US20060018279A1
公开(公告)日：2006-01-26
申请号：US11144208
申请日：2005-06-02
IPC分类号： H04Q7/00
CPC分类号： H04W88/10 , H04B7/2656 , H04L1/0083 , H04L5/14 , H04L27/2602 , H04W92/10 , Y02D70/1222 , Y02D70/1242 , Y02D70/1244 , Y02D70/21 , Y02D70/449
摘要： Frame structures and transmission techniques for a wireless communication system are described. In one frame structure, a super-frame includes multiple outer-frames, and each outer-frame includes multiple frames, and each frame includes multiple time slots. The time slots in each super-frame are allocated for downlink and uplink and for different radio technologies (e.g., W-CDMA and OFDM) based on loading. Each physical channel is allocated at least one time slot in at least one frame of each outer-frame in the super-frame. An OFDM waveform is generated for each downlink OFDM slot and multiplexed onto the slot. A W-CDMA waveform is generated for each downlink W-CDMA slot and multiplexed onto the slot. A modulated signal is generated for the multiplexed W-CDMA and OFDM waveforms and transmitted on the downlink. Each physical channel is transmitted in bursts. The slot allocation and coding and modulation for each physical channel can change for each super-frame.
摘要翻译： 描述了用于无线通信系统的帧结构和传输技术。 在一帧结构中，超帧包括多个外帧，并且每个外帧包括多个帧，并且每个帧包括多个时隙。 基于加载，为每个超帧中的时隙分配给下行链路和上行链路以及不同的无线电技术（例如，W-CDMA和OFDM）。 每个物理信道在超帧中的每个外帧的至少一个帧中分配至少一个时隙。 为每个下行OFDM时隙生成OFDM波形并复用到时隙上。 为每个下行链路W-CDMA时隙产生W-CDMA波形并复用到该时隙上。 为多路复用的W-CDMA和OFDM波形生成调制信号并在下行链路上发送。 每个物理信道以突发方式传输。 每个物理信道的时隙分配和编码和调制可以针对每个超帧而改变。
-
3.发明申请公开(公告)号：US20060013168A1
公开(公告)日：2006-01-19
申请号：US11144180
申请日：2005-06-02
IPC分类号： H04B7/216
CPC分类号： H04W88/10 , H04B7/2656 , H04L1/0083 , H04L5/14 , H04L27/2602 , H04W92/10 , Y02D70/1222 , Y02D70/1242 , Y02D70/1244 , Y02D70/21 , Y02D70/449
摘要： Techniques for transmitting data in a wireless communication system are described. Physical channels to be sent in a super-frame are identified and allocated 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. Data to be sent using another radio technology (e.g., W-CDMA) is also processed and multiplexed onto time slots allocated for this radio technology.
-
4.发明申请公开(公告)号：US20060067206A1
公开(公告)日：2006-03-30
申请号：US11234723
申请日：2005-09-23
CPC分类号： H04L25/0226 , H04L5/0007 , H04L5/0023 , H04L5/0048 , H04L5/0058 , H04L12/189 , H04L25/0232 , H04L27/2601 , H04W52/32
摘要： A method and apparatus for communication in a system employing differing transmission protocols. It is determined whether a first time slot of one transmission protocol is adjacent to a second time slot of another transmission protocol, and if a first symbol within the first time slot is adjacent to a second symbol of the second time slot. A pilot power and/or a number of pilot sub-carriers or tones of the first symbol is increased and channel estimation is performed on the first symbol.
-
5.发明申请Transmission of overhead information for broadcast and multicast services in a wireless communication system 有权在无线通信系统中传输用于广播和多播服务的开销信息公开(公告)号：US20060018269A1
公开(公告)日：2006-01-26
申请号：US11144846
申请日：2005-06-02
IPC分类号： H04B7/212
CPC分类号： H04W88/10 , H04B7/2656 , H04L1/0083 , H04L5/14 , H04L27/2602 , H04W92/10 , Y02D70/1222 , Y02D70/1242 , Y02D70/1244 , Y02D70/21 , Y02D70/449
摘要： To transmit overhead information for broadcast and multicast services in a system that utilizes multiple radio technologies, time slots used for OFDM in a super-frame are initially ascertained. Overhead information for multiple streams to be sent in the time slots used for OFDM is generated. The overhead information conveys the time slots and the coding and modulation used for the streams and may be given in various forms. Multiple records may be formed for the overhead information for the streams. The overhead information for the streams is processed and time division multiplexed with the data for the streams in the super-frame. Information indicating the time slots used for OFDM in the super-frame may be sent separately or included in the overhead information. An indicator may also be appended to each stream to indicate whether there is any change in the overhead information for the stream in the next super-frame.
摘要翻译： 为了在利用多个无线电技术的系统中传送用于广播和多播服务的开销信息，最初确定了用于超帧中的OFDM的时隙。 产生用于在用于OFDM的时隙中发送的多个流的开销信息。 开销信息传达用于流的时隙和编码和调制，并且可以以各种形式给出。 可以为流的开销信息形成多个记录。 对流的开销信息进行处理，并与超帧中的流的数据进行时分复用。 指示用于超帧中的OFDM的时隙的信息可以单独发送或包括在开销信息中。 指示符也可以附加到每个流以指示在下一个超帧中的流的开销信息是否存在任何改变。
-
公开(公告)号：US20060013186A1
公开(公告)日：2006-01-19
申请号：US11144211
申请日：2005-06-02
IPC分类号： H04B7/208
CPC分类号： H04W88/10 , H04B7/2656 , H04L1/0083 , H04L5/14 , H04L27/2602 , H04W92/10 , Y02D70/1222 , Y02D70/1242 , Y02D70/1244 , Y02D70/21 , Y02D70/449
摘要： Techniques to transmit data with cyclic delay diversity and pilot staggering are described. For cyclic delay diversity, OFDM symbols having different cyclic delay durations are generated. The cyclic delay durations for the OFDM symbols may be selected to be time varying with respect to the cyclic delay durations for OFDM symbols transmitted by a neighboring base station. An FDM pilot is generated and multiplexed on multiple sets of subbands in different symbol periods. Waveforms for a second radio technology (e.g., W-CDMA) may be generated for data to be transmitted with this radio technology. The OFDM symbols are multiplexed onto time slots used for OFDM, and the waveforms for the second radio technology are multiplexed onto time slots used for this radio technology. One or multiple modulated signals may be generated based on the multiplexed OFDM symbols and waveforms. Each modulated signal is transmitted from a respective antenna.
-
7.发明授权Transmission of overhead information for broadcast and multicast services in a wireless communication system 有权在无线通信系统中传输用于广播和多播服务的开销信息公开(公告)号：US08089855B2
公开(公告)日：2012-01-03
申请号：US11144846
申请日：2005-06-02
申请人： Avneesh Agrawal , Durga Prasad Malladi , Anastasios Stamoulis , Ashok Mantravadi , Ramaswamy Murali
发明人： Avneesh Agrawal , Durga Prasad Malladi , Anastasios Stamoulis , Ashok Mantravadi , Ramaswamy Murali
IPC分类号： H04J11/00
CPC分类号： H04W88/10 , H04B7/2656 , H04L1/0083 , H04L5/14 , H04L27/2602 , H04W92/10 , Y02D70/1222 , Y02D70/1242 , Y02D70/1244 , Y02D70/21 , Y02D70/449
摘要： To transmit overhead information for broadcast and multicast services in a system that utilizes multiple radio technologies, time slots used for OFDM in a super-frame are initially ascertained. Overhead information for multiple streams to be sent in the time slots used for OFDM is generated. The overhead information conveys the time slots and the coding and modulation used for the streams and may be given in various forms. Multiple records may be formed for the overhead information for the streams. The overhead information for the streams is processed and time division multiplexed with the data for the streams in the super-frame. Information indicating the time slots used for OFDM in the super-frame may be sent separately or included in the overhead information. An indicator may also be appended to each stream to indicate whether there is any change in the overhead information for the stream in the next super-frame.
摘要翻译： 为了在利用多个无线电技术的系统中传送用于广播和多播服务的开销信息，最初确定了用于超帧中的OFDM的时隙。 产生用于在用于OFDM的时隙中发送的多个流的开销信息。 开销信息传达用于流的时隙和编码和调制，并且可以以各种形式给出。 可以为流的开销信息形成多个记录。 对流的开销信息进行处理，并与超帧中的流的数据进行时分复用。 指示用于超帧中的OFDM的时隙的信息可以单独发送或包括在开销信息中。 指示符也可以附加到每个流以指示在下一个超帧中的流的开销信息是否存在任何改变。
-
公开(公告)号：US08687617B2
公开(公告)日：2014-04-01
申请号：US12480928
申请日：2009-06-09
申请人： Avneesh Agrawal , Durga Prasad Malladi , Anastasios Stamoulis , Ashok Mantravadi , Ramaswamy Murali
发明人： Avneesh Agrawal , Durga Prasad Malladi , Anastasios Stamoulis , Ashok Mantravadi , Ramaswamy Murali
IPC分类号： H04B7/208
CPC分类号： H04W88/10 , H04B7/2656 , H04L1/0083 , H04L5/14 , H04L27/2602 , H04W92/10 , Y02D70/1222 , Y02D70/1242 , Y02D70/1244 , Y02D70/21 , Y02D70/449
摘要： Techniques to transmit data with cyclic delay diversity and pilot staggering are described. For cyclic delay diversity, OFDM symbols having different cyclic delay durations are generated. The cyclic delay durations for the OFDM symbols may be selected to be time varying with respect to the cyclic delay durations for OFDM symbols transmitted by a neighboring base station. An FDM pilot is generated and multiplexed on multiple sets of subbands in different symbol periods. Waveforms for a second radio technology (e.g., W-CDMA) may be generated for data to be transmitted with this radio technology. The OFDM symbols are multiplexed onto time slots used for OFDM, and the waveforms for the second radio technology are multiplexed onto time slots used for this radio technology. One or multiple modulated signals may be generated based on the multiplexed OFDM symbols and waveforms. Each modulated signal is transmitted from a respective antenna.
摘要翻译： 描述了使用循环延迟分集和飞行员交错传输数据的技术。 对于循环延迟分集，生成具有不同循环延迟持续时间的OFDM符号。 OFDM符号的循环延迟持续时间可以被选择为相对于由相邻基站发送的OFDM符号的循环延迟持续时间而变化的时间。 在不同符号周期的多组子带上生成和复用FDM导频。 可以生成用于第二无线电技术（例如，W-CDMA）的波形，用于使用该无线电技术发送的数据。 OFDM符号被复用到用于OFDM的时隙上，并且用于第二无线电技术的波形被复用到用于该无线电技术的时隙上。 可以基于多路复用的OFDM符号和波形来生成一个或多个调制信号。 每个调制信号从相应的天线发送。
-
公开(公告)号：US08588203B2
公开(公告)日：2013-11-19
申请号：US11144211
申请日：2005-06-02
申请人： Avneesh Agrawal , Durga Prasad Malladi , Anastasios Stamoulis , Ashok Mantravadi , Ramaswamy Murali
发明人： Avneesh Agrawal , Durga Prasad Malladi , Anastasios Stamoulis , Ashok Mantravadi , Ramaswamy Murali
IPC分类号： H04J3/18
CPC分类号： H04W88/10 , H04B7/2656 , H04L1/0083 , H04L5/14 , H04L27/2602 , H04W92/10 , Y02D70/1222 , Y02D70/1242 , Y02D70/1244 , Y02D70/21 , Y02D70/449
摘要： Techniques to transmit data with cyclic delay diversity and pilot staggering are described. For cyclic delay diversity, OFDM symbols having different cyclic delay durations are generated. The cyclic delay durations for the OFDM symbols may be selected to be time varying with respect to the cyclic delay durations for OFDM symbols transmitted by a neighboring base station. An FDM pilot is generated and multiplexed on multiple sets of subbands in different symbol periods. Waveforms for a second radio technology (e.g., W-CDMA) may be generated for data to be transmitted with this radio technology. The OFDM symbols are multiplexed onto time slots used for OFDM, and the waveforms for the second radio technology are multiplexed onto time slots used for this radio technology. One or multiple modulated signals may be generated based on the multiplexed OFDM symbols and waveforms. Each modulated signal is transmitted from a respective antenna.
摘要翻译： 描述了使用循环延迟分集和飞行员交错传输数据的技术。 对于循环延迟分集，生成具有不同循环延迟持续时间的OFDM符号。 OFDM符号的循环延迟持续时间可以被选择为相对于由相邻基站发送的OFDM符号的循环延迟持续时间而变化的时间。 在不同符号周期的多组子带上生成和复用FDM导频。 可以生成用于第二无线电技术（例如，W-CDMA）的波形，用于使用该无线电技术发送的数据。 OFDM符号被复用到用于OFDM的时隙上，并且用于第二无线电技术的波形被复用到用于该无线电技术的时隙上。 可以基于多路复用的OFDM符号和波形来生成一个或多个调制信号。 每个调制信号从相应的天线发送。
-
公开(公告)号：US08577299B2
公开(公告)日：2013-11-05
申请号：US11144181
申请日：2005-06-02
申请人： Avneesh Agrawal , Durga Prasad Malladi , Anastasios Stamoulis , Ashok Mantravadi , Ramaswamy Murali
发明人： Avneesh Agrawal , Durga Prasad Malladi , Anastasios Stamoulis , Ashok Mantravadi , Ramaswamy Murali
IPC分类号： H04B1/00
CPC分类号： H04W88/10 , H04B7/2656 , H04L1/0083 , H04L5/14 , H04L27/2602 , H04W92/10 , Y02D70/1222 , Y02D70/1242 , Y02D70/1244 , Y02D70/21 , Y02D70/449
摘要： To transmit data in a manner to mitigate the deleterious effects of delay spread, the expected coverage areas for multiple transmissions to be sent in multiple time slots are initially determined. Cyclic prefix lengths for these transmissions are selected based on the expected coverage areas. The cyclic prefix length for each transmission may be selected from among a set of allowed cyclic prefix lengths based on the expected coverage area for that transmission, the pilot staggering used for the transmission, and so on. For example, a shorter cyclic prefix length may be selected for each local transmission, and a longer cyclic prefix length may be selected for each wide-area transmission. The selected cyclic prefix lengths may be signaled to the terminals. The transmissions are processed (e.g., OFDM modulated) based on the selected cyclic prefix lengths. The cyclic prefix lengths may be selected periodically, e.g., in each super-frame.
摘要翻译： 为了以减轻延迟扩展的有害影响的方式发送数据，首先确定要在多个时隙中发送的多个传输的预期覆盖区域。 基于预期的覆盖区域来选择这些传输的循环前缀长度。 可以根据该传输的预期覆盖区域，用于传输的导频交错等，从一组允许的循环前缀长度中选择每个传输的循环前缀长度，等等。 例如，可以为每个本地传输选择较短的循环前缀长度，并且可以为每个广域传输选择较长的循环前缀长度。 所选择的循环前缀长度可以被发送到终端。 基于所选择的循环前缀长度来处理（例如，OFDM调制）传输。 可以周期性地选择循环前缀长度，例如在每个超帧中。
-
-
-
-
-
-
-
-
-
搜索结果
97 条记录 (耗时 0.022 秒)
