An efficient transceiver design for superimposed waveforms with orthogonal polynomials
An efficient transceiver design for superimposed waveforms with orthogonal polynomials
复制标题
用于正交多项式叠加波形的高效收发器设计
DOI：
--
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Lutfiye Durak
中科院分区：
文献类型：
--
作者：
Evren Çatak;Lutfiye Durak
广义频分复用（GFDM）被认为是用于5G无线通信系统的候选波形。它是正交频分复用（OFDM）的推广形式，包括多个子载波和子符号。最近提出了一种替代波形，在这项研究中被称为叠加波形，以提高数据速率。叠加波形是基于在时频格型结构的每个网格中使用正交多项式。以这种方式，利用不同的正交脉冲发送多于一个的符号。虽然所提出的波形对于增加的数据速率显示出有希望的结果，但是关于实现存在一些问题。基于此，我们利用离散傅立叶逆变换（IDFT）和离散傅立叶变换（DFT）运算，通过数学推导，将收发器结构设计为低复杂度的方式。带宽效率几乎为2.4，远远高于高斯脉冲的GFDM。在瑞利衰落信道下对叠加波形的性能进行了分析，并与加性白色高斯噪声（AWGN）信道下的性能进行了比较。
Generalized frequency division multiplexing (GFDM) is considered as a candidate waveform for 5G wireless communication systems. It is the generalize form of the orthogonal frequency division multiplexing (OFDM) that includes a number of subcarriers and subsymbols. An alternative waveform referred as the superimposed waveform in this study, was recently proposed to increase the data rate. The superimposed waveform is based on using orthogonal polynomial in each grid of time-frequency lattice structure. In this way, more than one symbols are transmitted with the different orthogonal pulses. While the proposed waveform showed promising results for the increasing data rate, there were some issues regarding the implementations. Motivated by this, we design transceiver structure as a low complex way with mathematical derivation by using inverse discrete Fourier transform (IDFT) and DFT operations. The bandwidth efficiency is almost 2.4 much higher than GFDM with Gaussian pulses. The performances of the superimposed waveform over a Rayleigh Fading channel and its comparison over additive white Gaussian noise (AWGN) channel are done.