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    • 31. 发明申请
    • APPARATUSES FOR DMRS DESIGN OR PROCESSING FOR GUARD INTERVAL OR ZERO TAIL DFT SPREAD OFDM SYSTEMS
    • 用于卫星间隔或零尾随DFT分布的DMRS设计或处理的设备OFDM系统
    • WO2017065825A1
    • 2017-04-20
    • PCT/US2016/023689
    • 2016-03-23
    • INTEL IP CORPORATION
    • PAWAR, SameerNIU, HuaningKUMAR, Utsaw
    • H04L27/26
    • H04L27/2613
    • Disclosed are apparatuses for communication devices. An apparatus for a communication device includes control circuitry configured to determine a discrete Fourier transform (DFT) of a constant amplitude zero autocorrelation waveform (CAZAC) sequence appended with zeros in the time domain to generate a frequency domain interpolated CAZAC sequence. The control circuitry is also configured to determine an inverse discrete Fourier transform (IDFT) of the frequency domain interpolated CAZAC sequence to generate a demodulation reference signal (DMRS), and cause the DMRS to be transmitted through a cellular data network. An apparatus for a communication device includes control circuitry configured to perform a Fourier transform on a received DMRS to obtain a resulting signal, and use the resulting signal as a reference to demodulate orthogonal frequency-division multiplexing (OFDM) symbols. The control circuitry is also configured to perform a minimum mean squares estimation (MMSE) channel estimation on the resulting signal.
    • 公开了用于通信设备的装置。 一种用于通信设备的设备包括:控制电路,被配置为确定在时域中附加零的恒幅零自相关波形(CAZAC)序列的离散傅里叶变换(DFT),以生成频域内插的CAZAC序列。 控制电路还被配置为确定频域内插CAZAC序列的离散傅立叶逆变换(IDFT)以生成解调参考信号(DMRS),并且使得DMRS通过蜂窝数据网络来发送。 一种用于通信设备的装置包括控制电路,该控制电路被配置为对所接收的DMRS执行傅立叶变换以获得结果信号,并且使用所得到的信号作为参考来解调正交频分复用(OFDM)符号。 控制电路还被配置为对所得信号执行最小均方估计(MMSE)信道估计。
    • 38. 发明申请
    • WIRELESS COMMUNICATION VIA COMBINED CHANNEL TRAINING AND PHYSICAL LAYER HEADER SIGNALING
    • 无线通信通过组合通道训练和物理层信号信号
    • WO2016032611A1
    • 2016-03-03
    • PCT/US2015/037721
    • 2015-06-25
    • INTEL IP CORPORATION
    • LI, QinghuaCHEN, XiaogangNIU, HuaningZHU, Yuan
    • H04L27/26H04L1/00
    • H04B7/0452H04B7/0617H04L5/0023H04L5/0048H04L5/0091H04L25/0232H04L69/22
    • Embodiments herein relate to wireless communication using combined channel training and physical layer header (SIG) signaling. Devices that comply with the 802.11ax or High Efficiency WLAN (HEW) standard may generate and transmit packets that include such combined information. The combined information may be beamformed to a receiver device via an OFDM signal, which may be decoded by the receiver device to obtain subsequent data included in the signal. For example, initial training symbols associated with channel training subcarriers in the signal may be detected and used to perform a rough estimate of the channel. The rough estimate may thereafter be refined using data symbols detected from adjacent data subcarriers using the channel training symbols. In this way, data subcarriers may also be used to determine a channel response along with channel training subcarriers. Channel training information may be transmitted with data, such as user-specific information, in a single symbol.
    • 本文的实施例涉及使用组合信道训练和物理层报头(SIG)信令的无线通信。 符合802.11ax或高效WLAN(HEW)标准的设备可能会生成并传输包含此类组合信息的数据包。 组合的信息可以经由OFDM信号被波束形成到接收机设备,OFDM信号可以被接收机设备解码以获得包括在信号中的后续数据。 例如,可以检测与信号中的信道训练子载波相关联的初始训练符号,并用于执行信道的粗略估计。 此后可以使用使用信道训练符号从相邻数据子载波检测的数据符号来粗略估计。 以这种方式,数据副载波也可以用于确定与信道训练子载波一起的信道响应。 信道训练信息可以用单个符号中的诸如用户特定信息的数据发送。