SimOFDM: Spectral Efficiency and PAPR Reduction Technique

In communication systems, SimOFDM technology offers significant advantages in transmission spectrum utilization and Peak-to-Average Power Ratio (PAPR) performance. This technique divides OFDM signals into multiple subsignals, enabling substantial reduction in PAPR for each individual subsignal. Through time-domain modulation of these subsignals, frequency-domain overlapping can be achieved, thereby dramatically improving spectral efficiency. From an implementation perspective, SimOFDM typically involves partitioning the original data stream using serial-to-parallel conversion, applying orthogonal frequency-division multiplexing to each subsignal, and employing phase rotation or selective mapping algorithms for PAPR reduction. The core algorithm often utilizes inverse fast Fourier transform (IFFT) operations for signal generation and incorporates windowing techniques for spectral shaping. This makes SimOFDM an efficient communication technology capable of playing crucial roles in practical applications, particularly in 5G and beyond systems where computational efficiency is achieved through optimized IFFT/FFT implementations and smart subcarrier allocation strategies.