Abstract
High peak-to-average power ratio (PAPR), a main problem of 5G Filtered-Orthogonal Frequency Division Multiplexing (F-OFDM) system, seriously affects the system’s transmission efficiency. Aiming at the shortcomings of the traditional selective mapping (SLM) algorithm, the grid scroll chaotic extended sequence (GSCES) algorithm is proposed to solve the high PAPR problem. The proposed grid multiscroll chaotic maps are used as random phase sequence vectors instead of the traditional pseudo random sequence, which provide a large number of random sequences with good correlation characteristics, random characteristics, and high security. The proposed random phase sequence vectors can meet the needs of 5G mass connections. The original input signals are divided into real part and imaginary part, which are, respectively, dot produced with the proposed grid multiscroll chaotic maps. The numerical simulation results show that the proposed GSCES algorithm effectively increases the number of candidate sequences, reduces the PAPR values, and improves the transmission efficiency and security. Moreover, the hardware experimental results produce at 2 × 2 × 2-grid multiscroll chaotic attractor, which further proves the physical realization of the proposed system. The proposed schemes have a broad application prospect in 5G multicarrier modulation technology.
Highlights
In 2015, Filtered-OFDM (F-OFDM) technology was rst put forward publicly at the World Mobile Communication Congress
The original signal and its periodic shift signal are added and the minimum peak-to-average power ratio (PAPR) is selected as the candidate signal [6]. e time-frequency domain encryption technique is proposed based on the multichaos and selective mapping (SLM) PAPR suppression algorithm. e Lozi and Logistic maps are used to interfere the carrier in the time-frequency domain
The design of the hardware circuit produces at 2 × 2 × 2-grid multiscroll hardware experimental results. e produced grid multiscroll chaotic maps are used as random phase sequence vectors instead of the traditional pseudo random sequence. e grid scroll chaotic extended sequence (GSCES) algorithm is proposed to solve the high PAPR problem. e numerical simulation results show that the proposed GSCES algorithm effectively increases the numbers of candidate sequences, reduces the PAPR values, and improves the transmission efficiency and security
Summary
In 2015, Filtered-OFDM (F-OFDM) technology was rst put forward publicly at the World Mobile Communication Congress. It is an adaptive airport waveform modulation technology whose subcarrier bandwidth can be adjusted according to speci c application scenarios. F-OFDM technology has many advantages, such as no need for strict synchronization, reduced out-of-band energy leakage, the di erent waveform modulation, multiple access technology and frame structure based on the mobile communication application scene and business requirements, the dynamic soft interface parameter con guration according to the 5G business needs, and packet tra c transmission suitable for Internet of things [1,2,3,4,5]. E time-frequency domain encryption technique is proposed based on the multichaos and SLM PAPR suppression algorithm. A method is proposed to decrease the PAPR of the 16-QAM OFDM system, which combines the chaotic map and SLM algorithm
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