知搜-全球专利检索

  1. Login
  2. Sign Up

Search Results

5 records (took 0.017 seconds)

    METHODS FOR FLEXIBLE REFERENCE SIGNAL TRANSMISSION WITH SINGLE CARRIER FREQUENCY DOMAIN MULTIPLE ACCESS (SC-FDMA) AND OFDMA
    1.
    发明申请
    METHODS FOR FLEXIBLE REFERENCE SIGNAL TRANSMISSION WITH SINGLE CARRIER FREQUENCY DOMAIN MULTIPLE ACCESS (SC-FDMA) AND OFDMA 有权

    公开(公告)号：US20250168049A1

    公开(公告)日：2025-05-22

    申请号：US19031195

    申请日：2025-01-17

    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

    Inventor： Alphan SAHIN ,  Rui YANG ,  Erdem BALA

    IPC: H04L27/26 ,  H04L1/00 ,  H04L5/00 ,  H04W4/70

    Abstract: A method for transmitting a discrete fourier transform (DFT) DFT-S-OFDM signal including frequency domain reference symbols is disclosed. The method comprises: determining to null a plurality of data symbols prior to DFT-spreading; performing DFT-spreading including the determined null data symbols; puncturing an interleaved output of the DFT-spreading; inserting reference symbols in a frequency domain of the punctured and interleaved DFT-S-OFDM signal; and transmitting the DFT-S-OFDM signal with inserted reference symbols to a receiver. The transmitted DFT-S-OFDM signal enables the receiver to apply zeros corresponding to the reference symbols to an interleaved input of DFT-despreading, and cancel interference due to the puncturing by using all outputs of the DFT-despreading.

    METHODS, APPARATUSES, SYSTEMS, DEVICES, AND COMPUTER PROGRAM PRODUCTS DIRECTED TO LOW LATENCY BANDWIDTH EFFICIENT COMMUNICATIONS WITH LOW DUPLEX SPACING
    2.
    发明申请
    METHODS, APPARATUSES, SYSTEMS, DEVICES, AND COMPUTER PROGRAM PRODUCTS DIRECTED TO LOW LATENCY BANDWIDTH EFFICIENT COMMUNICATIONS WITH LOW DUPLEX SPACING 审中-公开

    公开(公告)号：US20180076947A1

    公开(公告)日：2018-03-15

    申请号：US15559951

    申请日：2016-03-22

    Applicant: InterDigital Patent Holdings, Inc.

    Inventor： Leonid L KAZAKEVICH ,  Erdem BALA

    IPC: H04L5/14 ,  H04L5/00 ,  H04W72/08

    CPC classification number: H04L5/1461 ,  H04L5/0037 ,  H04L5/1469 ,  H04W72/082

    Abstract: Methods, apparatuses, systems, devices, and computer program products directed to low latency, bandwidth efficient communications with low duplex spacing (LDS) are provided. The LDS communications are facilitated by partitioning a (e.g., single) channel to include DL and UL portions (or “bandwidth fragments”) with low duplex spacing between the DL and UL portions. Among the new methodologies provided herein is a method that may include partitioning a channel to include a first bandwidth fragment that is bounded by, and overlaps or has low duplex spacing with, a pair of non-overlapping bandwidth fragments that are symmetrically offset symmetrically from a reference frequency associated with the channel; receiving a receive signal while transmitting a transmit signal on either the first bandwidth fragment or the pair non-overlapping bandwidth fragments; and using any of cancellation and interference reduction to reduce a portion of the receive signal that corresponds to the transmit signal.

    PULSE-SHAPED ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING
    4.
    发明申请
    PULSE-SHAPED ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING 审中-公开
    脉冲形正交频分多路复用

    公开(公告)号：US20150372843A1

    公开(公告)日：2015-12-24

    申请号：US14766040

    申请日：2014-02-04

    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

    Inventor： Erdem BALA ,  Rui YANG ,  Jialing LI ,  Daniel R. COHEN

    IPC: H04L25/03 ,  H04L27/26

    Abstract: A method and apparatus for performing pulse shaping using different windowing functions for different sub-bands of a transmission is disclosed. A method for use in a wireless transmit/receive unit (WTRU) may include the WTRU receiving data symbols. The WTRU may assign the data symbols to a plurality of subcarriers in different sub-bands and map the data symbols on each of the plurality of subcarriers in the different sub-bands to a plurality of corresponding subcarriers of an inverse fast Fourier transform (IFFT) block. The WTRU may take an IFFT of the block for each sub-band and pad an output of the IFFT block with a prefix and a postfix for each sub-band. The WTRU may apply a windowing function to an output of the padding for each sub-band and form a composite signal for transmission by adding an output of the windowing of each sub-band. The WTRU may transmit the signal.

    Abstract translation: 公开了一种用于使用用于传输的不同子带的不同窗函数来执行脉冲整形的方法和装置。 在无线发射/接收单元（WTRU）中使用的方法可以包括WTRU接收数据符号。 WTRU可以将数据符号分配给不同子带中的多个子载波，并将不同子带中的多个子载波中的每一个上的数据符号映射到快速傅里叶逆变换（IFFT）的多个对应子载波， 块。 WTRU可以针对每个子带采取该块的IFFT，并且对于每个子带填充IFFT块的输出，并具有前缀和后缀。 WTRU可以对每个子带的填充的输出应用加窗函数，并且通过添加每个子带的窗口的输出来形成用于发送的复合信号。 WTRU可以发送信号。

Patent Agency Ranking