公开(公告)号：US20160112089A9

公开(公告)日：2016-04-21

申请号：US14197440

申请日：2014-03-05

Applicant: Intel Corporation

Inventor： Guodong ZHANG ,  Yingming TSAI ,  Kyle Jung-Lin Pan

IPC: H04B1/711

CPC classification number: H04B1/711 ,  H04L5/026 ,  H04L2025/03414

Abstract: An orthogonal frequency division multiplexing (OFDM)-code division multiple access (CDMA) system is disclosed. The system includes a transmitter and a receiver. At the transmitter, a spreading and subcarrier mapping unit spreads an input data symbol with a complex quadratic sequence code to generate a plurality of chips and maps each chip to one of a plurality of subcarriers. An inverse discrete Fourier transform is performed on the chips mapped to the subcarriers and a cyclic prefix (CP) is inserted to an OFDM frame. A parallel-to-serial converter converts the time-domain data into a serial data stream for transmission. At the receiver, a serial-to-parallel converter converts received data into multiple received data streams and the CP is removed from the received data. A discrete Fourier transform is performed on the received data streams and equalization is performed. A despreader despreads an output of the equalizer to recover the transmitted data.

Abstract translation: 公开了一种正交频分复用（OFDM）码分多址（CDMA）系统。 该系统包括发射机和接收机。 在发射机处，扩展和副载波映射单元利用复数二次序列码扩展输入数据符号，以产生多个码片，并将每个码片映射到多个副载波中的一个。 对映射到子载波的芯片执行逆离散傅立叶变换，并且将循环前缀（CP）插入到OFDM帧中。 并行到串行转换器将时域数据转换为串行数据流以进行传输。 在接收机处，串并转换器将接收的数据转换成多个接收的数据流，并从接收的数据中移除CP。 对接收的数据流执行离散付里叶变换，并进行均衡。 去扩展器对均衡器的输出进行解扩以恢复传输的数据。

公开(公告)号：US20170250772A1

公开(公告)日：2017-08-31

申请号：US15439492

申请日：2017-02-22

Applicant: INTEL CORPORATION

Inventor： Guodong ZHANG ,  Yingming TSAI ,  Jung-Lin Pan

IPC: H04N19/189 ,  H04L5/02

CPC classification number: H04B1/711 ,  H04L5/026 ,  H04L2025/03414

Abstract: An orthogonal frequency division multiplexing (OFDM)-code division multiple access (CDMA) system is disclosed. The system includes a transmitter and a receiver. At the transmitter, a spreading and subcarrier mapping unit spreads an input data symbol with a complex quadratic sequence code to generate a plurality of chips and maps each chip to one of a plurality of subcarriers. An inverse discrete Fourier transform is performed on the chips mapped to the subcarriers and a cyclic prefix (CP) is inserted to an OFDM frame. A parallel-to-serial converter converts the time-domain data into a serial data stream for transmission. At the receiver, a serial-to-parallel converter converts received data into multiple received data streams and the CP is removed from the received data. A discrete Fourier transform is performed on the received data streams and equalization is performed. A despreader despreads an output of the equalizer to recover the transmitted data.