公开(公告)号：US07539475B2

公开(公告)日：2009-05-26

申请号：US11229348

申请日：2005-09-16

申请人： Rajiv Laroia ,  Junyi Li ,  Hui Jin

发明人： Rajiv Laroia ,  Junyi Li ,  Hui Jin

IPC分类号： H04B1/10 ,  H04B1/04 ,  H04B17/00

CPC分类号： H04L27/2647 ,  H04B1/12 ,  H04L25/061

摘要： Special DC tone treatment in a wireless communications system, e.g., an OFDM system, is discussed. In the downlink, a wireless terminal receiver introduces self-interference at the DC tone from the RF/baseband conversion. A base station every so often does not transmit on the downlink DC tone while continuing to transmit on other downlink tones. Wireless terminals measure received signal on the downlink DC tone during the time of suspended DC tone transmission, estimate self-interference and apply a correction to other received downlink DC tones. In the uplink DC tone interference is a composite of the assigned wireless terminal transmitter's baseband/RF conversion self-interference and air link noise. During one symbol interval of an N symbol interval dwell, the uplink DC tone is reserved for a special modulation symbol, which is a predetermined function of the other N−1 modulation symbols. At the base station, its receiver receives a set of modulation symbols conveyed by the uplink DC tone for a dwell, calculates the average DC component and corrects the received N−1 modulation symbols.

摘要翻译： 讨论了无线通信系统（例如，OFDM系统）中的特殊DC音调处理。 在下行链路中，无线终端接收机在来自RF /基带转换的DC音调下引入自干扰。 基站通常在下行链路DC音调下不发送，同时在其他下行链路音调上继续发送。 无线终端在暂停的直流音调传输期间测量下行链路直流音上的接收信号，估计自干扰并对其他接收的下行链路直流音调进行校正。 在上行链路中，直流音干扰是指定的无线终端发射机的基带/ RF转换自干扰和空中链路噪声的组合。 在N个符号间隔驻留的一个符号间隔期间，上行链路DC频调被保留用于作为其他N-1个调制符号的预定函数的特殊调制符号。 在基站，其接收机接收由上行链路DC频调传送的一组调制符号进行驻留，计算平均DC分量并校正接收到的N-1个调制符号。

公开(公告)号：US20070009053A1

公开(公告)日：2007-01-11

申请号：US11229067

申请日：2005-09-16

申请人： Rajiv Laroia ,  Junyi Li ,  Hui Jin

发明人： Rajiv Laroia ,  Junyi Li ,  Hui Jin

IPC分类号： H04K1/10

CPC分类号： H04L5/0058 ,  H04L5/0007 ,  H04L5/0046 ,  H04L27/2626

摘要： Special DC tone treatment in a wireless communications system, e.g., an OFDM system, is discussed. In the downlink, a wireless terminal receiver introduces self-interference at the DC tone from the RF/baseband conversion. A base station every so often does not transmit on the downlink DC tone while continuing to transmit on other downlink tones. Wireless terminals measure received signal on the downlink DC tone during the time of suspended DC tone transmission, estimate self-interference and apply a correction to other received downlink DC tones. In the uplink DC tone interference is a composite of the assigned wireless terminal transmitter's baseband/RF conversion self-interference and air link noise. During one symbol interval of an N symbol interval dwell, the uplink DC tone is reserved for a special modulation symbol, which is a predetermined function of the other N-1 modulation symbols. At the base station, its receiver receives a set of modulation symbols conveyed by the uplink DC tone for a dwell, calculates the average DC component and corrects the received N-1 modulation symbols.

摘要翻译： 讨论了无线通信系统（例如，OFDM系统）中的特殊DC音调处理。 在下行链路中，无线终端接收机在来自RF /基带转换的DC音调下引入自干扰。 基站通常在下行链路DC音调下不发送，同时在其他下行链路音调上继续发送。 无线终端在暂停的直流音调传输期间测量下行链路直流音上的接收信号，估计自干扰并对其他接收的下行链路直流音调进行校正。 在上行链路中，直流音干扰是指定的无线终端发射机的基带/ RF转换自干扰和空中链路噪声的组合。 在N个符号间隔驻留的一个符号间隔期间，上行链路DC频调被保留用于作为其他N-1个调制符号的预定函数的特殊调制符号。 在基站，其接收机接收由上行链路DC频调传送的一组调制符号进行驻留，计算平均DC分量并校正接收到的N-1个调制符号。

公开(公告)号：US20070009068A1

公开(公告)日：2007-01-11

申请号：US11229068

申请日：2005-09-16

申请人： Rajiv Laroia ,  Junyi Li ,  Hui Jin

发明人： Rajiv Laroia ,  Junyi Li ,  Hui Jin

IPC分类号： H03D1/04

CPC分类号： H04L25/062 ,  H04L27/2647

摘要： Special DC tone treatment in a wireless communications system, e.g., an OFDM system, is discussed. In the downlink, a wireless terminal receiver introduces self-interference at the DC tone from the RF/baseband conversion. A base station every so often does not transmit on the downlink DC tone while continuing to transmit on other downlink tones. Wireless terminals measure received signal on the downlink DC tone during the time of suspended DC tone transmission, estimate self-interference and apply a correction to other received downlink DC tones. In the uplink DC tone interference is a composite of the assigned wireless terminal transmitter's baseband/RF conversion self-interference and air link noise. During one symbol interval of an N symbol interval dwell, the uplink DC tone is reserved for a special modulation symbol, which is a predetermined function of the other N-1 modulation symbols. At the base station, its receiver receives a set of modulation symbols conveyed by the uplink DC tone for a dwell, calculates the average DC component and corrects the received N-1 modulation symbols.

摘要翻译： 讨论了无线通信系统（例如，OFDM系统）中的特殊DC音调处理。 在下行链路中，无线终端接收机在来自RF /基带转换的DC音调下引入自干扰。 基站通常在下行链路DC音调下不发送，同时在其他下行链路音调上继续发送。 无线终端在暂停的直流音调传输期间测量下行链路直流音上的接收信号，估计自干扰并对其他接收的下行链路直流音调进行校正。 在上行链路中，直流音干扰是指定的无线终端发射机的基带/ RF转换自干扰和空中链路噪声的组合。 在N个符号间隔驻留的一个符号间隔期间，上行链路DC频调被保留用于作为其他N-1个调制符号的预定函数的特殊调制符号。 在基站，其接收机接收由上行链路DC频调传送的一组调制符号进行驻留，计算平均DC分量并校正接收到的N-1个调制符号。

公开(公告)号：US07974253B2

公开(公告)日：2011-07-05

申请号：US11230303

申请日：2005-09-19

申请人： Rajiv Laroia ,  Hui Jin ,  Tom Richardson

发明人： Rajiv Laroia ,  Hui Jin ,  Tom Richardson

IPC分类号： H04B7/216 ,  G08C15/00 ,  H04J3/14 ,  H04J1/16 ,  H04W72/00

CPC分类号： H04L1/0033 ,  H04L1/0003 ,  H04L1/0015 ,  H04L1/0025 ,  H04L1/0026

摘要： A base station selects and assigns uplink segments to specific wireless terminals. The base station estimates potential system interference levels, selects, assigns, and transmits a maximum uplink rate indicator value to a wireless terminal indicating the maximum uplink data rate that the wireless terminal is permitted to use. The wireless terminal receives the maximum data rate indicator and selects an uplink data rate to use which is less than or equal to the maximum data rate indicator level. The selection includes consideration of data amounts, data importance, communications channel quality, changes affecting the channel and/or power information. The wireless terminal encodes information indicative of the selected used rate with the user data/information to be transmitted by placing additional energy on a subset of the uplink signals. The base station receives the uplink signals including user data/information and data rate. The base station extracts the data rate used and utilizes the data rate to demodulate and decode the uplink user data/information.

摘要翻译： 基站选择并分配给特定无线终端的上行链路段。 基站估计潜在的系统干扰电平，选择，分配和发送最大上行链路速率指示符值给无线终端，指示无线终端被允许使用的最大上行数据速率。 无线终端接收最大数据速率指示符，并选择小于或等于最大数据速率指示符级别的上行链路数据速率。 选择包括考虑数据量，数据重要性，通信信道质量，影响信道和/或功率信息的改变。 无线终端通过在上行链路信号的子集上放置附加的能量来将表示所选择的使用率的信息与要发送的用户数据/信息进行编码。 基站接收包括用户数据/信息和数据速率的上行链路信号。 基站提取所使用的数据速率，利用数据速率对上行用户数据/信息进行解调和解码。

公开(公告)号：US20060205396A1

公开(公告)日：2006-09-14

申请号：US11230303

申请日：2005-09-19

申请人： Rajiv Laroia ,  Hui Jin ,  Tom Richardson

发明人： Rajiv Laroia ,  Hui Jin ,  Tom Richardson

IPC分类号： H04Q7/20

CPC分类号： H04L1/0033 ,  H04L1/0003 ,  H04L1/0015 ,  H04L1/0025 ,  H04L1/0026

摘要： A base station selects and assigns uplink segments to specific wireless terminals. The base station estimates potential system interference levels, selects, assigns, and transmits a maximum uplink rate indicator value to a wireless terminal indicating the maximum uplink data rate that the wireless terminal is permitted to use. The wireless terminal receives the maximum data rate indicator and selects an uplink data rate to use which is less than or equal to the maximum data rate indicator level. The selection includes consideration of data amounts, data importance, communications channel quality, changes affecting the channel and/or power information. The wireless terminal encodes information indicative of the selected used rate with the user data/information to be transmitted by placing additional energy on a subset of the uplink signals. The base station receives the uplink signals including user data/information and data rate. The base station extracts the data rate used and utilizes the data rate to demodulate and decode the uplink user data/information.

摘要翻译： 基站选择并分配给特定无线终端的上行链路段。 基站估计潜在的系统干扰电平，选择，分配和发送最大上行链路速率指示符值给无线终端，指示无线终端被允许使用的最大上行数据速率。 无线终端接收最大数据速率指示符，并选择小于或等于最大数据速率指示符级别的上行链路数据速率。 选择包括考虑数据量，数据重要性，通信信道质量，影响信道和/或功率信息的改变。 无线终端通过在上行链路信号的子集上放置附加的能量来将表示所选择的使用率的信息与要发送的用户数据/信息进行编码。 基站接收包括用户数据/信息和数据速率的上行链路信号。 基站提取所使用的数据速率，利用数据速率对上行用户数据/信息进行解调和解码。

公开(公告)号：US09137072B2

公开(公告)日：2015-09-15

申请号：US11486895

申请日：2006-07-14

申请人： Tom Richardson ,  Hui Jin ,  Junyi Li ,  Vladimir Parizhisky

发明人： Tom Richardson ,  Hui Jin ,  Junyi Li ,  Vladimir Parizhisky

IPC分类号： H04B17/00 ,  H04L27/26 ,  H04W52/08 ,  H04W52/14 ,  H04W28/18

CPC分类号： H04L27/2602 ,  H04L1/0004 ,  H04L27/2627 ,  H04W28/18 ,  H04W52/08 ,  H04W52/146 ,  H04W72/0413

摘要： In a first mode of dedicated control channel (DCCH) operation, a wireless terminal is allocated more segments than in a second mode. The wireless terminal uses different information bit to modulation symbol mapping in the different modes. On a per DCCH segment basis, the same number of modulation symbols are communicated in either mode but more information bits are conveyed in the second mode. Information bits for a DCCH segment are partitioned into two subsets. The two subsets are used to generate another set, each of the two subsets and the another set are input to the same mapping function to generate three equal size sets of modulation symbols which are transmitted via the DCCH segment. Uplink tone hopping is used such that one of the equal size sets of modulation symbols for the DCCH segment uses the same tone but a different set uses a different tone.

摘要翻译： 在专用控制信道（DCCH）操作的第一模式中，与第二模式相比，无线终端被分配更多的分组。 无线终端在不同模式下使用不同的信息比特来调制符号映射。 在每个DCCH段的基础上，以任一模式传送相同数量的调制符号，但在第二模式中传送更多的信息位。 DCCH段的信息位被划分成两个子集。 这两个子集用于生成另一集合，两个子集中的每一个和另一个集合被输入到相同的映射函数，以生成经由DCCH段发送的三个相等大小的调制符号集合。 使用上行链路跳频使得用于DCCH段的相等大小的调制符号组之一使用相同的音调，但是不同的组使用不同的音调。

公开(公告)号：US20070149137A1

公开(公告)日：2007-06-28

申请号：US11486895

申请日：2006-07-14

申请人： Tom Richardson ,  Hui Jin ,  Junyi Li ,  Vladimir Parizhisky

发明人： Tom Richardson ,  Hui Jin ,  Junyi Li ,  Vladimir Parizhisky

IPC分类号： H04B1/00 ,  H04B7/00

CPC分类号： H04L27/2602 ,  H04L1/0004 ,  H04L27/2627 ,  H04W28/18 ,  H04W52/08 ,  H04W52/146 ,  H04W72/0413

摘要： In a first mode of dedicated control channel (DCCH) operation, a wireless terminal is allocated more segments than in a second mode. The wireless terminal uses different information bit to modulation symbol mapping in the different modes. On a per DCCH segment basis, the same number of modulation symbols are communicated in either mode but more information bits are conveyed in the second mode. Information bits for a DCCH segment are partitioned into two subsets. The two subsets are used to generate another set, each of the two subsets and the another set are input to the same mapping function to generate three equal size sets of modulation symbols which are transmitted via the DCCH segment. Uplink tone hopping is used such that one of the equal size sets of modulation symbols for the DCCH segment uses the same tone but a different set uses a different tone.

摘要翻译： 在专用控制信道（DCCH）操作的第一模式中，与第二模式相比，无线终端被分配更多的分组。 无线终端在不同模式下使用不同的信息比特来调制符号映射。 在每个DCCH段的基础上，以任一模式传送相同数量的调制符号，但在第二模式中传送更多的信息位。 DCCH段的信息位被划分成两个子集。 这两个子集用于生成另一集合，两个子集中的每一个和另一个集合被输入到相同的映射函数，以生成经由DCCH段发送的三个相等大小的调制符号集合。 使用上行链路跳频使得用于DCCH段的相等大小的调制符号组之一使用相同的音调，但是不同的组使用不同的音调。

公开(公告)号：US20080298494A1

公开(公告)日：2008-12-04

申请号：US11945720

申请日：2007-11-27

申请人： Thomas Richardson ,  Hui Jin ,  Rajiv Laroia

发明人： Thomas Richardson ,  Hui Jin ,  Rajiv Laroia

IPC分类号： H04B7/02

CPC分类号： H04L5/023 ,  H04B1/713 ,  H04B7/068 ,  H04B7/0691 ,  H04L1/06 ,  H04L25/0202 ,  H04L25/4902 ,  H04L27/2604 ,  H04W52/28 ,  H04W52/325

摘要： Methods and apparatus for improving the utilization of air link resources in a wireless communications system, e.g., an OFDM MIMO system, including a base station with multiple transmit antennas are described. Superposition signaling in the downlink is employed. The superimposed signal includes a first transform result signal and a second lower power signal. The first transform result signal is generated from a first signal, which uses position modulation, e.g., including null components and high power non-null components. Different components of the first transform result signal are directed to different transmit antennas. The first transform result signal communicates information to a first wireless terminal, e.g., a weak receiver. The non-null received elements of the first transform result signal are utilized by a second wireless terminal, e.g., a superior receiver, as pilots to determine a channel estimate. The second wireless terminal uses the determined channel estimate to demodulate received second signals.

摘要翻译： 描述了在包括具有多个发射天线的基站的无线通信系统（例如OFDM MIMO系统）中改善空中链路资源的利用的方法和装置。 采用下行链路中的叠加信令。 叠加信号包括第一变换结果信号和第二较低功率信号。 第一变换结果信号从使用位置调制的第一信号产生，例如包括零分量和高功率非零分量。 第一变换结果信号的不同组件被引导到不同的发射天线。 第一变换结果信号将信息传送到第一无线终端，例如弱接收机。 第一变换结果信号的非零接收元件由第二无线终端（例如，上级接收机）用作导频以确定信道估计。 第二无线终端使用确定的信道估计来解调所接收的第二信号。

公开(公告)号：US20090122810A9

公开(公告)日：2009-05-14

申请号：US11316353

申请日：2005-12-22

申请人： Hui Jin ,  Junyi Li

发明人： Hui Jin ,  Junyi Li

IPC分类号： H04J3/22

CPC分类号： H04L27/2601 ,  H04B1/713 ,  H04W16/02 ,  H04W16/12 ,  H04W16/24

摘要： Methods and apparatus for allocating and hopping tones for uplink communications purposes in adjacent sectors and neighboring cells of an OFDM system are described. Physical tones used in each sector and cell are allocated to tone hopping sequences according to a tone to tone hopping sequence allocation function which uses both a cell identifier and sector identifier. Different sectors and cells use different tone to tone hopping sequence allocation functions through the use of different cell and/or sector identifiers to minimize the number of collisions between hopping sequences of adjacent sectors and neighboring cells. Uplink tone hopping sequences, corresponding to logical tones are allocated to uplink communications channels. Uplink communications channels are used by wireless terminals, e.g., mobile nodes, to transmit data to base stations. Over time, a wireless terminal uses the tones included in the uplink tone hopping sequences corresponding to uplink communications channels it is authorized to use.

摘要翻译： 描述用于在OFDM系统的相邻扇区和相邻小区中用于分配和跳频用于上行链路通信目的的方法和装置。 根据使用单元标识符和扇区标识符的音调跳频序列分配功能，将每个扇区和单元中使用的物理音调分配给音频跳频序列。 不同的扇区和小区通过使用不同的小区和/或扇区标识符来使用不同的音调跳频序列分配功能来最小化相邻扇区和相邻小区的跳频序列之间的冲突次数。 对应于逻辑音调的上行链路跳频序列被分配给上行链路通信信道。 无线终端（例如，移动节点）使用上行链路通信信道来向基站发送数据。 随着时间的推移，无线终端使用与被授权使用的上行链路通信信道相对应的上行链路跳频序列中包括的音调。

公开(公告)号：US20070064730A1

公开(公告)日：2007-03-22

申请号：US11316353

申请日：2005-12-22

申请人： Hui Jin ,  Junyi Li

发明人： Hui Jin ,  Junyi Li

IPC分类号： H04J3/22

CPC分类号： H04L27/2601 ,  H04B1/713 ,  H04W16/02 ,  H04W16/12 ,  H04W16/24

摘要： Methods and apparatus for allocating and hopping tones for uplink communications purposes in adjacent sectors and neighboring cells of an OFDM system are described. Physical tones used in each sector and cell are allocated to tone hopping sequences according to a tone to tone hopping sequence allocation function which uses both a cell identifier and sector identifier. Different sectors and cells use different tone to tone hopping sequence allocation functions through the use of different cell and/or sector identifiers to minimize the number of collisions between hopping sequences of adjacent sectors and neighboring cells. Uplink tone hopping sequences, corresponding to logical tones are allocated to uplink communications channels. Uplink communications channels are used by wireless terminals, e.g., mobile nodes, to transmit data to base stations. Over time, a wireless terminal uses the tones included in the uplink tone hopping sequences corresponding to uplink communications channels it is authorized to use.

摘要翻译： 描述用于在OFDM系统的相邻扇区和相邻小区中用于分配和跳频用于上行链路通信目的的方法和装置。 根据使用单元标识符和扇区标识符的音调跳频序列分配功能，将每个扇区和单元中使用的物理音调分配给音频跳频序列。 不同的扇区和小区通过使用不同的小区和/或扇区标识符来使用不同的音调跳频序列分配功能来最小化相邻扇区和相邻小区的跳频序列之间的冲突次数。 对应于逻辑音调的上行链路跳频序列被分配给上行链路通信信道。 无线终端（例如，移动节点）使用上行链路通信信道来向基站发送数据。 随着时间的推移，无线终端使用与被授权使用的上行链路通信信道相对应的上行链路跳频序列中包括的音调。