Research on the Pulse-position Modulation in the Digital Communication System

With the development of digital communication, pulse-position modulation (PPM) has become an important technique in wireless communication because of its efficient bandwidth utilization and sensitive detection efficiency. Many scholars have conducted in-depth research on it. In this paper, we design a model of a PPM system that requires 3 bits to transmit each signal, and the system includes a modulator and demodulator. Then, we use MATLAB to simulate the pulse-position modulation signal transmission in an Additive White Gaussian Noise (AWGN). We calculate the bit error rate (BER) by generating many random signals under different signal-to-noise ratios (SNR). We finally verify the characteristics of PPM by comparing it with after modulation methods. This paper aims to analyze the characteristics of PPM in wireless communications through the simulation of a PPM method. Then we draw the conclusions that PPM has a low noise interference and a strong anti-interference ability. Hence, we present the outlooks for the development of pulse-position modulation in the future.