GFDM Frame Design for 5G Application Scenarios

Abstract

Abstract-The services foreseen for 5G networks will demand a vast number of challenging requirements to be fulfilled by the physical layer. These services can be grouped into application scenarios, each one with a key requirement to be addressed by the 5G network. A flexible waveform associated with a appropriate data frame is an essential feature in order to guarantee the support of contrasting requirements from different application scenarios such as Enhanced Mobile Broadband, Internet of Things, Tactile Internet and Internet Access for Remote Areas. In this paper, we propose a flexible data frame based on Generalized Frequency Division Multiplexing (GFDM) that can be tailored to address the specific key requirements of the different 5G scenarios. The paper also presents the physical layer parametrization that can be used for each application.

Polarization-Driven Puncturing for Polar Codes in 5g Systems

“…where α and β are integer numbers. We then exploit the fact that α < β, which yields αX y < βX y , (3)(4)(5)(6)(7)(8)(9)(10) proving (3)(4)(5)(6)(7)(8). Figure 3.3 shows the percentage of coincidence of punctured channels of different compared methods, this difference of punctured channels directly influences the performance of the proposed PD technique.…”

“…In decoding, we have u =ûG n , (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21) whereû is obtained by SC. Figure 2.8 shows the performance of polar codes with n = 1024 and rate r = 0.5 using systematic and non-systematic codes in AWGN channel.…”

“…. (3)(4) Consider the sort function [a, k] = sort(b) which implements (3)(4), where a lists the sorted b and k contains the corresponding indices of a. Table 3.1 show an example of the polarization vector b for n = 8, sorting vector a and the new index k.…”

“…The vector k = [8,5,6,2,7,3,4,1] contains the indices of the polarization values of the channels in increasing order, which is used to obtain the puncturing vector p of the proposed PD method: p = [k(1), . .…”

“…We choose the generator matrix G 8 . For the puncturing of G 8 to G 5 , the channels with the lowest polarization rank values are W 7 , W 5 and W 3 , the puncturing vector is p = (8,6,4) and |p| = 3. The 1st element of p is 8, which results in the deletion of the 8th column and the 8th row of G 8 .…”