Analysis of Multiuser DSSS with Different M-PSK Modulation Under Noise Effects

M.A.Hadi

doi:https://doi.org/10.14445/22315373/IJMTT-V28P509

International Journal of Mathematics Trends and Technology

Research Article | Open Access | Download PDF

Volume 28 | Number 1 | Year 2015 | Article Id. IJMTT-V28P509 | DOI : https://doi.org/10.14445/22315373/IJMTT-V28P509

Analysis of Multiuser DSSS with Different M-PSK Modulation Under Noise Effects

M.A.Hadi

Citation :

M.A.Hadi, "Analysis of Multiuser DSSS with Different M-PSK Modulation Under Noise Effects," International Journal of Mathematics Trends and Technology (IJMTT), vol. 28, no. 1, pp. 52-60, 2015. Crossref, https://doi.org/10.14445/22315373/IJMTT-V28P509

Abstract

Lot of applications in these days is using Spread spectrum communication systems. Direct Sequence Spread Spectrum (DSSS) system can reduce the effects of interference on the transmitted information and it is suitable for design of multi-user systems where the entire bandwidth of the RF carrier is made available to each user. It is robust against channel impairments. The aim of this paper is to study the performance of multiuser DSSS system under adaptive white Gaussian noise AWGN radio impairment for different types of baseband phase shift keying modulation. The simulation process is performed using Simulink tool where the signals from the base station are modulated using M-PSK method and then transmitted to varying number of mobiles (one to eight). The signal received at each mobile will be demodulated using the same M-PSK method and then estimated separately. The simulation results show that the bit error rate (BER) increases as a result of increasing the number of users and/or the M value of the MPSK modulation mode. So, M-PSK is better in term of BER when the value of M is small.

Keywords

DSSS, M-PSK, BER, AWGN Channel.

References

[1] Haykin, Simon (2008). Communication systems (4 ed.). John Wiley & Sons. p. 488.
[2] Rappaport, Theodore (January 2010). Wireless Communications Principles and Practice (2 ed.). Prentice- Hall, Inc. p. 458.
[3] Capacity, Coverage and Deployment Considerations for IEEE 802.11G (PDF), Cisco Systems, Inc, 2005, p. 1
[4] https://en.wikipedia.org/wiki/Phase-shift_keying
[5] Wireless Network Evolution: 2G to 3G, Pearson Education, ISBN 81-317-1346-6, 2007.
[6] J. S. Chitode (2006) Text Book Name “Digital Communication” First Edition, Technical Publication. [7] Shyam Parekh, IEEE 802.11 Wireless LANs, http://inst.eecs.berkeley.edu/~ee122/sp07/80211.pdf, Retrieved at 1, July, 2015.
[8]IEEE Standard for Information technology, Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications, retrieved at 1, July, 2015.
[9] Communications Blockset For Use with Simulink®, User’s Guide, The Math Works Inc.
[10] https://en.wikipedia.org/wiki/Additive_white_Gaussian_no ise
[11] International Journal of Computer Applications (0975 – 8887) Volume 26– No.9, July 2011, A. Sudhir Babu Associate Professor, Department of CSE, PVP Siddhartha Institute of Technology, Vijayawada, India Dr. K.V Sambasiva Rao
[12]M. Alnuaimi, K. Shuaib and I. Jawhar, “Performance Evaluation of IEEE 802.15.4 Physical Layer Using Matlab/Simulink”, Proceeding of the IEEE IIT06 Conference, Nov19-21, 2006, Dubai, UAE.