SCATTERED PILOT PATTERN AND CHANNEL ESTIMATION METHOD FOR MIMO-OFDM SYSTEMS
    21.
    发明申请
    SCATTERED PILOT PATTERN AND CHANNEL ESTIMATION METHOD FOR MIMO-OFDM SYSTEMS 有权
    用于MIMO-OFDM系统的散射引航模式和信道估计方法

    公开(公告)号:US20110216808A1

    公开(公告)日:2011-09-08

    申请号:US13108443

    申请日:2011-05-16

    Abstract: Methods and apparatus are provided for inserting data symbols and pilot symbols in an OFDM (orthogonal frequency division multiplexing) transmission resource utilizing frequency hopping patterns for the data symbols and/or the pilot symbols. Data symbols and pilot symbols are allocated for down link (base station to mobile station) and up link (mobile station to bases station) transmission resources in a two-dimensional time-frequency pattern. For each antenna of a MIMO-OFDM (multiple input multiple output OFDM) communication system, pilot symbols are inserted in a scattered pattern in time-frequency and data symbols are inserted in an identical frequency-hopping pattern in time-frequency as that of other antennas.

    Abstract translation: 提供了使用用于数据符号和/或导频符号的跳频图案在OFDM(正交频分复用)传输资源中插入数据符号和导频符号的方法和装置。 数据符号和导频符号分配给二维时频模式的下行链路(基站到移动台)和上行链路(移动台到基站)的传输资源。 对于MIMO-OFDM(多输入多输出OFDM)通信系统的每个天线,导频符号以时间 - 频率的散射图案插入,并且数据符号以与其它信号的时间频率相同的跳频图案插入 天线。

    SCATTERED PILOT PATTERN AND CHANNEL ESTIMATION METHOD FOR MIMO-OFDM SYSTEMS
    22.
    发明申请
    SCATTERED PILOT PATTERN AND CHANNEL ESTIMATION METHOD FOR MIMO-OFDM SYSTEMS 有权
    用于MIMO-OFDM系统的散射引航模式和信道估计方法

    公开(公告)号:US20100271930A1

    公开(公告)日:2010-10-28

    申请号:US12830791

    申请日:2010-07-06

    Abstract: Methods and apparatus are provided for inserting data symbols and pilot symbols in an OFDM (orthogonal frequency division multiplexing) transmission resource utilizing frequency hopping patterns for the data symbols and/or the pilot symbols. Data symbols and pilot symbols are allocated for down link (base station to mobile station) and up link (mobile station to bases station) transmission resources in a two-dimensional time-frequency pattern. For each antenna of a MIMO-OFDM (multiple input multiple output OFDM) communication system, pilot symbols are inserted in a scattered pattern in time-frequency and data symbols are inserted in an identical frequency-hopping pattern in time-frequency as that of other antennas.

    Abstract translation: 提供了使用用于数据符号和/或导频符号的跳频图案在OFDM(正交频分复用)传输资源中插入数据符号和导频符号的方法和装置。 数据符号和导频符号以二维时频模式分配给下行链路(基站到移动台)和上行链路(移动台到基站)传输资源。 对于MIMO-OFDM(多输入多输出OFDM)通信系统的每个天线,导频符号以时间 - 频率的散射图案插入,并且数据符号以与其它信号的时间频率相同的跳频图案插入 天线。

    FLEXIBLE FRAME STRUCTURE FOR WIRELESS COMMUNICATION

    公开(公告)号:US20240089044A1

    公开(公告)日:2024-03-14

    申请号:US18518835

    申请日:2023-11-24

    CPC classification number: H04L5/0044 H04L27/2628

    Abstract: Current radio frame structures in Long-Term Evolution (LTE) and New Radio (NR) have some restrictions. A frame structure is disclosed herein that aims to provide more flexibility. Embodiments of the flexible frame structure include different parameters that are flexible, i.e. that are configurable. A non-exhaustive list of parameters that may be configurable include: length of the frame; length of a subframe (if a subframe is even defined); length of a slot and/or number of symbol blocks in a slot (if a slot is even defined); length of the CP and/or data portion in a symbol block, or ratio of CP to data portion, which may vary between symbol blocks; downlink/uplink switching gap length, etc.

    SYSTEM AND METHOD FOR TRANSMITTING AND RECEIVING SINGLE-CARRIER OQAM SYMBOLS

    公开(公告)号:US20210176108A1

    公开(公告)日:2021-06-10

    申请号:US17181047

    申请日:2021-02-22

    Abstract: A system and method are provided for processing symbols for transmission. The method involves producing a single carrier offset quadrature amplitude modulation (OQAM) waveform signal from a set of K complex symbols. The method further involves pulse shaping 2K frequency domain samples of the OQAM waveform signal with J non-zero coefficients, where the J non-zero coefficients represent a frequency response of a conjugate symmetrical pulse shape, and K≤J≤2K−1. The approach has the advantage of avoiding self-interference, with the result that better BLER performance may be possible. The approach is applicable to any modulation order and also avoids bandwidth expansion. Flexibility is provided through a trade-off between PAPR vs. spectrum efficiency.

    SYSTEM AND METHOD FOR HYBRID-ARQ
    28.
    发明申请

    公开(公告)号:US20210126655A1

    公开(公告)日:2021-04-29

    申请号:US16665121

    申请日:2019-10-28

    Abstract: Systems and methods are disclosed for providing H-ARQ transmissions in respect of a set of horizontal code blocks are combined in a code. Retransmissions contain vertical parity check blocks which are determined from verticals from the set of horizontal code blocks. Once all the vertical parity check blocks have been transmitted, a new set may be determined after performing interleaving upon either the content of the horizontal code blocks, in the case of non-systematic horizontal code blocks, or over the content of encoder input bits in the place of systematic horizontal code blocks. The interleaving may be bitwise or bit subset-wise. wise. The retransmissions do not contain any of the original bits. In the decoder, soft decisions are produced, and nothing needs to be discarded; decoding will typically improve with each retransmission.

    SYSTEM AND METHOD FOR TRANSMITTING AND RECEIVING SINGLE-CARRIER OQAM SYMBOLS

    公开(公告)号:US20210075661A1

    公开(公告)日:2021-03-11

    申请号:US16567122

    申请日:2019-09-11

    Abstract: A system and method are provided for processing symbols for transmission. The method involves producing a set of 2K outputs that include K real components and K imaginary components from K complex symbols, performing a Fourier transform operation on the 2K outputs to produce 2K Fourier transform outputs, pulse shaping the 2K Fourier transform outputs by multiplying each of J of the 2K Fourier transform outputs with a respective one of J non-zero coefficients, where J is odd, and K≤J≤2K−1, performing an inverse Fourier transform operation on the J pulse shaped outputs to produce an inverse Fourier transform output; and outputting the inverse Fourier transform output. The approach has the advantage of avoiding self-interference, with the result that better BLER performance may be possible. The approach is applicable to any modulation order without bandwidth expansion. Flexibility is provided through a trade-off between PAPR vs. spectrum efficiency.

    SYSTEMS AND METHODS FOR GRANT-FREE UPLINK TRANSMISSION

    公开(公告)号:US20200059900A1

    公开(公告)日:2020-02-20

    申请号:US16555208

    申请日:2019-08-29

    Abstract: Communication resources for grant-free transmission are assigned to a User Equipment (UE) in a communication system. A diversity channel for uplink grant-free data transmission includes uplink grant free transmission resources assigned to the UE. The uplink grant-free transmission resources include one or more positions corresponding to partitions of an access region and one or more positions corresponding to resource elements (REs) in each partition of the access region. At a UE, an uplink initial data transmission and a subsequent transmission are transmitted by the UE in the diversity channel without receiving grant information from a network equipment. At a network equipment, the uplink initial data transmission and the subsequent transmission are received in the diversity channel without transmitting grant information to the UE.

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