Methods and apparatus for mapping modulation symbols to resources in OFDM systems

    公开(公告)号:US10148394B2

    公开(公告)日:2018-12-04

    申请号:US14742477

    申请日:2015-06-17

    Abstract: A transmission resource in a time domain subframe is divided into a plurality of equal duration resource elements in a time and frequency domain, the plurality of resource elements are segregated into a plurality of resource regions, information to be transmitted is modulated to generate a sequence of modulation symbols at a transmitter, the sequence of modulation symbols is mapped into the plurality of resource elements in the plurality of resource regions, and the modulation symbols are transmitted via a plurality of antennas using the respective corresponding resource elements to a receiver. The mapping of the modulation symbols in at least one resource region is independent of a certain control channel information that is carried in the time domain subframe, and the mapping of the modulation symbols in at least another resource region is dependent upon that certain control channel information.

    Transmit methods with delay diversity and space-frequency diversity
    15.
    发明授权
    Transmit methods with delay diversity and space-frequency diversity 有权
    具有延迟分集和空间 - 频率分集的发射方法

    公开(公告)号:US08837622B2

    公开(公告)日:2014-09-16

    申请号:US13847310

    申请日:2013-03-19

    Abstract: Several open-loop solutions encompass the small delay CDD codeword cycling and codeword cycling between different re-transmissions of both small and large delay CDD, and include an open-loop codeword cycling method for an SFBC+FSTD scheme, as well as its extension to SFBC+FSTD based HARQ. In one method, a plurality of information bits are encoded, scrambled and modulated to generate a plurality of modulation symbols. The plurality of modulation symbols are mapped onto the subcarriers in at least one transmission layer of a transmission resource. The modulation symbols are then precoded using a matrix for cyclic delay diversity and a set of codewords from a certain codebook to generate a plurality of precoded symbols. The codewords are cycled for every a certain number of subcarriers. Finally, the precoded symbols are transmitted via a plurality of transmission antennas.

    Abstract translation: 几个开环解决方案包括小延迟CDD码字循环和小延迟和大延迟CDD的不同重传之间的码字循环,并且包括用于SFBC + FSTD方案的开环码字循环方法,以及其扩展到 基于SFBC + FSTD的HARQ。 在一种方法中,多个信息比特被编码,加扰和调制以产生多个调制符号。 多个调制符号被映射到传输资源的至少一个传输层中的子载波上。 然后使用用于循环延迟分集的矩阵和来自某个码本的一组码字来对调制符号进行预编码,以生成多个预编码符号。 每个一定数量的副载波循环码字。 最后,预编码符号经由多个发送天线发送。

    Precoding signaling in a MIMO wireless communication system
    16.
    发明授权
    Precoding signaling in a MIMO wireless communication system 有权
    MIMO无线通信系统中的预编码信令

    公开(公告)号:US08761309B2

    公开(公告)日:2014-06-24

    申请号:US13692801

    申请日:2012-12-03

    Inventor: Farooq Khan

    Abstract: A method for performing data transmission between a transmitter and a receiver. The method includes the steps of generating a feedback message at the receiver in response to data received from the transmitter, assigning an identifier for the feedback message, storing the feedback message in association with the identifier in the receiver, transmitting the feedback message and the identifier to the transmitter, determining, at the transmitter, transmission format for data to be transmitted to the receiver based on the feedback message received from the receiver; and transmitting data and a control message, by the transmitter, using the determined transmission format, with the control message comprising the identifier of the feedback message based on which the transmission format is determined.

    Abstract translation: 一种用于在发射机和接收机之间执行数据传输的方法。 该方法包括以下步骤:响应于从发射机接收的数据在接收机处产生反馈消息,分配反馈消息的标识符,将接收机中的标识符与反馈消息相关联地存储在反馈消息中,发送反馈消息和标识符 根据从接收机接收到的反馈消息,在发射机处确定要发送到接收机的数据的传输格式; 以及由所述发射机使用确定的传输格式发送数据和控制消息,所述控制消息包括所述反馈消息的标识符,基于所述标识符确定所述传输格式。

    METHODS AND APPARATUS FOR DOWNLINK PDSCH POWER SETTING
    18.
    发明申请
    METHODS AND APPARATUS FOR DOWNLINK PDSCH POWER SETTING 有权
    用于下行链路PDSCH功率设置的方法和装置

    公开(公告)号:US20140010181A1

    公开(公告)日:2014-01-09

    申请号:US13966102

    申请日:2013-08-13

    Abstract: Methods and apparatus for transmitting power setting information in a downlink Physical Downlink Shared Channel (PDSCH) in a communication system. In this communication system, a plurality of methods for calculating traffic-to-pilot ratios (T2P) are established. In addition, a mapping scheme between a plurality of overhead signals and a plurality of reference signal (RS) overhead ratios, ηRS, and the plurality of T2P calculation methods is established. A user-specific T2P ratio PB, k/PRS for certain OFDM symbols, a RS overhead ratio ηRS and a calculation method selected from the plurality of T2P calculation methods are assigned to a wireless terminal. Then, an overhead signal corresponding to both of the assigned RS overhead ratio ηRS and the assigned T2P calculation method is selected in accordance with the mapping scheme and is transmitted to the wireless terminal. In addition, the user-specific traffic-to-pilot ratio PB, k/PRS is transmitted to the wireless terminal. The wireless terminal may calculate the traffic-to-pilot ratios across different transmission antennas and different OFDM symbols in dependence upon the received traffic-to-pilot ratio PB, k/PRS, and the RS overhead ratio and the T2P calculation method indicated by the RS overhead signal.

    Abstract translation: 在通信系统中的下行链路物理下行链路共享信道(PDSCH)中发送功率设定信息的方法和装置。 在该通信系统中,建立了用于计算业务导频比(T2P)的多种方法。 此外,建立了多个开销信号与多个参考信号(RS)开销比,etaRS和多个T2P计算方法之间的映射方案。 对于无线终端,分配用于特定OFDM符号的用户特定T2P比率PB,k / PRS,RS开销比率etaRS以及从多个T2P计算方法中选择的计算方法。 然后,根据映射方案选择对应于所分配的RS开销比etaRS和所分配的T2P计算方法的开销信号,并将其发送到无线终端。 此外,将用户特定的业务导频比PB,k / PRS发送到无线终端。 无线终端可以根据接收到的业务导频比PB,k / PRS和RS开销比和T2P计算方法,计算不同发射天线和不同OFDM符号之间的业务导频比 RS开销信号。

    APPARATUS AND METHODS FOR FLEXIBLE RF CONFIGURATOIN IN MULTI-ANTENNA WIRELESS SYSTEMS
    19.
    发明申请
    APPARATUS AND METHODS FOR FLEXIBLE RF CONFIGURATOIN IN MULTI-ANTENNA WIRELESS SYSTEMS 有权
    多天线无线系统中灵活RF配置的设备及方法

    公开(公告)号:US20130336242A1

    公开(公告)日:2013-12-19

    申请号:US13899148

    申请日:2013-05-21

    Abstract: An apparatus includes a baseband signal processing block, processing circuitry, and at least one radio frequency (RF) communication module communicably coupled to the baseband signal processing block and configured to communicate using a selected mode of communication in a channel. The processing circuitry is configured to detect a sub-channel band of unavailable spectrum within the channel, the band of unavailable spectrum being less than a whole of the channel. The channel includes one contiguous band of frequencies divisible into at least two non-overlapping non-adjacent sub-channels. The processing circuitry is configured to select one mode of communication selected from a plurality of modes including: a carrier aggregation (CA) only mode, a multiple input multiple output (MIMO) only mode, and a carrier aggregation multiple input multiple output (CA-MIMO) hybrid mode.

    Abstract translation: 一种装置包括基带信号处理块,处理电路和至少一个可通信地耦合到基带信号处理块的射频(RF)通信模块,并被配置为使用通道中选择的通信模式进行通信。 处理电路被配置为检测信道内的不可用频谱的子信道频带,不可用频谱的频带小于整个信道。 信道包括可分为至少两个非重叠的非相邻子信道的一个连续频带。 所述处理电路被配置为选择从多种模式中选择的一种通信模式,所述多种模式包括:仅载波聚合(CA)模式,仅多输入多输出(MIMO)模式和载波聚合多输入多输出(CA- MIMO)混合模式。

    PRECODING SIGNALING IN A MIMO WIRELESS COMMUNICATION SYSTEM
    20.
    发明申请
    PRECODING SIGNALING IN A MIMO WIRELESS COMMUNICATION SYSTEM 有权
    MIMO无线通信系统中的预编码信令

    公开(公告)号:US20130094613A1

    公开(公告)日:2013-04-18

    申请号:US13692801

    申请日:2012-12-03

    Inventor: Farooq Khan

    Abstract: A method for performing data transmission between a transmitter and a receiver. The method includes the steps of generating a feedback message at the receiver in response to data received from the transmitter, assigning an identifier for the feedback message, storing the feedback message in association with the identifier in the receiver, transmitting the feedback message and the identifier to the transmitter, determining, at the transmitter, transmission format for data to be transmitted to the receiver based on the feedback message received from the receiver; and transmitting data and a control message, by the transmitter, using the determined transmission format, with the control message comprising the identifier of the feedback message based on which the transmission format is determined.

    Abstract translation: 一种用于在发射机和接收机之间执行数据传输的方法。 该方法包括以下步骤:响应于从发射机接收的数据在接收机处产生反馈消息,分配反馈消息的标识符,将接收机中的标识符与反馈消息相关联地存储在反馈消息中,发送反馈消息和标识符 根据从接收机接收到的反馈消息,在发射机处确定要发送到接收机的数据的传输格式; 以及由所述发射机使用确定的传输格式发送数据和控制消息,所述控制消息包括所述反馈消息的标识符,基于所述标识符确定所述传输格式。

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