Design of Digital Pulse-Position Modulation System

Abstract

Pulse-Position Modulation (PPM) is a modulation method that only makes every pulse in the carrier pulse sequence change with time but without changing the shape and amplitude of the pulse signal. In this paper, a PPM system is designed. Firstly, an appropriate mathematical model is established to represent PPM transmission, and the shape of the pulse signal is designed. After that, we write the code and add a white Gaussian noise channel. Then the transmission process is simulated and visualized. At last, the error rate of the scheme is analyzed and discussed through MATLAB simulation then compared with other modulation methods. The goal of this paper is to study PPM by designing a PPM system fully. Besides, our method is compared with other modulation methods to understand the advantages and disadvantages of PPM. This may help other scholars to design and research the PPM system.

Performance of Static Power Allocation in Indoor Room on VLC-NOMA System Using Modulation PPM

“…The numerator is the channel gain of the i-th user, while the denominator is the sum of all user's channel gains. By using this ratio, the power allocation for each user is proportional to their channel gain and inversely proportional to the total channel gain of all users [11].…”

Analysis on improving channel capacity of MPPM

“…In order to meet the requirement, digital communication is applied instead of traditional analogue modulation, such as Pulse-Amplitude-Modulation (PAM). One of the digital modulation techniques is Pulse-position-modulation (PPM), which is used in digital communication systems to transmit data by varying the position of a pulse in a time slot [3]. Even though PPM has superior performance in transmission efficiency, it causes an increase in required transmission bandwidth.…”