Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 30302
Investigation of Roll off Factor in Pulse Shaping Filter on Maximal Ratio Combining for CDMA 2000 System

Authors: H. P. Singh, G. S. Walia, Padma D.


The integration of wide variety of communication services is made possible with invention of 3G technology. Code Division Multiple Access 2000 operates on various RF channel bandwidths 1.2288 or 3.6864 Mcps (1x or 3x systems). It is a 3G system which offers high bandwidth and wireless broadband services but its efficiency is lowered due to various factors like fading, interference, scattering, absorption etc. This paper investigates the effect of diversity (MRC), roll off factor in Root Raised Cosine (RRC) filter for the BPSK and QPSK modulation schemes. It is possible to transmit data with minimum Inter symbol Interference and within limited bandwidth with proper pulse shaping technique. Bit error rate (BER) performance is analyzed by applying diversity technique by varying the roll off factor for BPSK and QPSK. Roll off factor reduces the ISI and diversity reduces the Fading.

Keywords: Diversity, CDMA2000, root raised cosine, roll off factor

Digital Object Identifier (DOI):

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 2716


[1] K.Mahmoodet. al, "Performance of Multiuser CDMA Receivers With Bursty Traffic and Delay Constraints,” in International Conference on Computing, Networking and Communications (ICNC), 2012,pp. 428 – 433.
[2] N. Khairudinet. al, "Implementing Root Raised Cosine (RRC) filter for WCDMA using Xilinx,” in proceedings ofInternational Conference onElectronic Devices, Systems and Applications (ICEDSA), 2011 , ISSN: 2159-2047, pp 203-207.
[3] Fu Haiyang et al , "Performance Study on Spectrum Spreading and Scrambling Code in TD-SCDMA,” in proceedings of International Conference on Internet Technology and Applications, pp. 21-24, 2010 .
[4] A. R. Soni , "On the Performance of Open-Loop Transmit Diversity Techniques for IS-2000 Systems: A Comparative Study,” inIEEE Transactions On Wireless Communications, Vol. 3, No. 5, September 2004
[5] M. Hemlatahet. al, "Diversity Analysis in CDMA Based Broadband Wireless System,”Research Journal of Applied Sciences , Engineering and Technology ,vol. 4,pp. 660-663, 2012.
[6] T.Cihan and G. Ping , " Performance of Diversity Reception Over FadingChannels With Impulsive Noise,” in ICASSP ,vol 4, 2007
[7] Y. Xiangbin , " Receiver design for multiuser CDMA systems with space-time coding and imperfect state information,” in proceedings ofInternational Conferenceon Communication Systems, Networks and Applications (ICCSNA), Vol.1, 2010
[8] S.Z. Pinter, X.N. Fernando, "Concatenated fiber-wireless channel identification ina multiuser CDMA environment,” published in , Vol:1,Issue: 5, pp. 937-944,2007.
[9] J. Foo, "Improving fairness in multiuser diversity with capture,” in7th International Conference onInformation,Communications and Signal Processing”, pp. 1-5, ICICS 2009.
[10] R. Greg, "Access security in CDMA 2000 including a comparison with UMTS Access Security,” in IEEE wireless Communication,ISSN:1536-1284,pp. 19-25, 2004 .
[11] Rappaport T. S."Wireless Communication: Principles and Practice”, 2nd Ed., 2002, Prentice Hall.
[12] National Instrument Signal Generator tutorial, Pulse shaping to improve spectral efficiency.
[13] P.M. Grant,"Signal Processing Hardware and Software” IEEE signalProcessing Magazine,vol13,No.1,pp. 86-92,Jan 1992.
[14] F.Adachi,"Wireless Past and Future-Evolving Mobile Communication Systems,”IEICE Trans Fundamentals,Vol.E84-A,No.1,pp.55-60,Jan2001.
[15] Y. Xiangbin, "Receiver design for multiuser CDMA systems with space-time coding and imperfect state information,” inInternational Conference on Communication Systems, Networks and Applications (ICCSNA), Vol.1, 2010 .