Browse > Article

Performance Analysis of a CE-CPSK modulated code acquisition system for nonlinear amplified DS-CDMA signal  

Kim Seong-Cheol (우송대학교 철도전기 정보통신학부)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.10, no.1, 2006 , pp. 49-56 More about this Journal
Abstract
In this paper, to overcome the effect of nonlinear power amplifier, CE-CPSK(Constant Envelope Continuous Phase Shift Keying)modulation method which has the constant envelope and continuous phase characteristics is proposed. The code acquisition performances of the CE-CPSK modulated system and BPSK system are analyzed. And the performance is evaluated in terms of mean acquisition time and detection probability with the output backoff of the amplifier in multiuser environment. Results performed in a channel having a high degree of AM nonlinearity(AM-to-AM conversion), have shown that the CE-CPSK signal, when passed through class C-nonlinear Amplifier, has a spectrum with greatly reduced sidelobes compared to the conventional BPSK signal. The code acquisition performance of a CE-CPSK modulation system is better than that of BPSK system with nonlinear amplified multiuser environments.
Keywords
CE-CPSK; detection probability; AM nonlinearity; mean acquisition time; backoff;
Citations & Related Records
연도 인용수 순위
  • Reference
1 C. Andren, 'PSK sidebands reduced by premodulation filtering,' Microwave Journal, vol.21pp.69-73 Jan. 1978
2 E.T. Dickerson and W.B. Warren, 'Generation of constant-envelope-signals,' IEEE Trans.Commun, vol. COM-30 no. 12 pp2554-2556 Dec.1982
3 A.Polydors and C.Weber, 'A Unified approach to serial search spread spectrum code acquisition Part II: A Matched filter Receiver,' IEEE Trans. Comm., vol. COM-32, pp.550-560, May 1984
4 R.L.Peterson,andR.E.Zeimer, Introduction to spread spectrum communications. Englewood Cliffs, NJ:Prentice Hall, 1995
5 Y.Nagata,'Linear amplification technique for digital mobile communications,' Proc. IEEE Vehic. Technol. Comm., pp.159-164.1989
6 A. J. Viterbi, CDMA : Principles of Spread Spectrum Communication, Addison Wesley, 1995
7 A.Polydors and C.Weber, 'A Unified approach to serial search spread spectrum code acquisition Part I: General Theory,' IEEE Trans. Comm., vol.COM-32, pp.542-549, May 1984
8 G.L.Turin, 'Introduction to Spread Spectrum Antimultipath Techniques and Their Application to Urban Digital Radio,' Proceeding of the IEEE. Vol.68,no.3 Mach 1980
9 A.A.MSaleh and J.Salz,'Adaptive linearization of power amplifiers in digital radio systems,' Bell Syst.Tech.J., vol62 no.4 pp.1019-1033. April 1983   DOI
10 K.Simon, K.Omura, A.Scholtz and K.Levitt, Spread Spectrum Communications, vol.III, Computer Science Press, 1985