Performance Analysis of an Efficient Power Control Mechanism in Cellular Communications

Abstract

In this paper, a detailed study is carried out regarding the maximum number of users that each base station can support on a lossy channel. The author has analyzed the desired user's signal quality in a single cell CDMA (Code Division Multiple Access) system in the presence of MAI (Multiple Access Interference). Earlier power control techniques were designed to assure that all signals are received with equal power levels. Since these algorithms are designed for a imperfect control of power, the capacity of the system is reduced for a given BER (Bit-error Rate). But the EPCM (Efficient Power Control Mechanism) proposed in this paper assures a better System capacity and the EPCM is designed for the reverse link (mobile to base station) considering the path loss, log-normal shadowing and Rayleigh fading. The simulation results show that the proposed method satisfies the required quality of service for multimedia wireless LAN application. The EPCM is also analyzed mathematically and it is found that both the simulation and the analytical methods are coincident within the limits of approximation.

Indexing terms:

• Power control
• BER
• Digital modulation
• CDMA
• Fading
• MAI
• Path-loss

Additional information

Notes on contributors

D Rajaveerappa

D Rajaveerappa was born on 28.05.1964 at Nakkaneri, Rajapalayam Taluk, Tamil Nadu State and obtained BE in ECE from REC Trichy during the period 1985 and obtained MTech in Electrical Engineering from IIT, Chennai during the period 1988. Currently, he is doing his PhD in ECE at IISc, Bangalore under QIP (AICTE) scheme and his area of research works is in the field of Wireless Networks. He has worked as Assistant Executive Engineer ITI Ltd., Bangalore in the field of Microwave Communications. He has also worked as Lecturer in ECE at Pondicherry Engineering College, Pondicherry during the period from 1990 to 1992. Currently, he is with the Department of Electronics, Cochin University of Science and Technology, Cochin as Lecturer and teaching various subjects related to Telecommunication. He has published seven research papers in various national/international conferences/journals so far.