A Novel GFDM Waveform Design Based on Cascaded WHT-LWT Transform for the Beyond 5G Wireless Communications

Abstract

In this paper, a new WHT-LWT-GFDM waveform obtained by combining Walsh–Hadamard Transform (WHT), Lifting Wavelet Transform (LWT), and Generalized Frequency Division Multiplexing (GFDM) is presented for use in next-generation wireless communication systems. The proposed approach meets the requirement of 5th-generation (5G) and beyond communication schemes in terms of low latency, low peak-to-average-power ratio (PAPR), and low bit-error rate (BER). To verify the performance of the presented waveform, PAPR and BER simulation results were obtained in additive white Gaussian noise (AWGN) and flat Rayleigh fading channels, and the performance of the proposed system was compared with conventional Orthogonal Frequency Division Multiplexing (OFDM), GFDM, and Walsh–Hadamard transform-based GFDM (WHT-GFDM). Simulation results show that the proposed waveform achieves the best BER and PAPR performances and it provides considerable performance gains over the conventional waveforms.

DOA Estimation Based on Weighted l1-norm Sparse Representation for Low SNR Scenarios

“…Compared with the traditional array signal processing method, the sparse representation DOA estimation algorithm requires fewer snapshots and fewer array elements. OFDM is often used in communication systems, such as WiFi, long term evolution (LTE), 5th generation mobile communication technology (5G) and unmanned aerial vehicle (UAV) video signals [ 20 , 21 , 22 , 23 , 24 , 25 ]; therefore, the DOA estimation of OFDM signal is discussed in this paper.…”

A Novel Approach based on Lifting Wavelet Transform for MIMO-OFDM Systems

“…In this developed study, inspired by [8,9,14], the unit scheme of the recommended LWT-MIMO-OFDM technique, which combines MIMO-OFDM communication systems and LWT conversion, is shown in Figure 2. On the transmitter region of the LWT-MIMO-OFDM scheme illustrated in Fig.…”

“…2, the modulated data is used in a single-input, single-output OFDM structure in each branch connected to the antenna. In the proposed method, ILWT transformation is enforced to the modulated data with the aid of the following formula instead of the IFFT process in each OFDM structure (for detailed information on ILWT/LWT, see [8,9,14]).…”

“…In this developed study, inspired by [8,9,14], it is suggested to combine MIMO-OFDM method with LWT conversion to improve both BER accomplishments and PAPR accomplishments in MIMO-OFDM communication schemes. Thus, it can be observed from the computer simulation outcomes that remarkable performances are acquired in both PAPR achievements and BER achievements in wireless communication schemes where LWT-MIMO-OFDM technique is applied.…”

“…High reliability is evaluated by the bit error rate (BER) and is highly significant for systems where errors are less endurable. At high energy efficiency, low computational burden and low peak to average power ratio (PAPR) provide high energy efficiency [8,9,14]. For these reasons, BER and PAPR changes were used as benchmark criterion in our analyzes.…”