Multiuser Communication Using Chirp Signals of Equal Chirp Rate

Chirp modulation can be considered as a type of spread spectrum modulation process providing high processing gain, robustness to multipath interference, requirement of low power. The paper presents a multiuser communication system using chirp signals having the same chirp rate and different initial frequencies for different users. The design of the chirp waveforms is discussed, and the correlations between them and the conditions for minimizing interference are derived. Analytical expressions of bit error rate (BER) performance for coherent and noncoherent cases for single user and multiuser systems using the proposed set of linear chirp signals are analyzed in additive white Gaussian noise (AWGN) and Rayleigh fading channels. The performance of the multiuser system is compared with that of reported linear chirp spread spectrum (CSS) systems. Performance of the presented system is also evaluated under Doppler frequency offset scenario.

[1]  W. Osborne,et al.  Coherent and Noncoherent Detection of CPFSK , 1974, IEEE Trans. Commun..

[2]  Huaping Liu,et al.  Multicode ultra-wideband scheme using chirp waveforms , 2006, IEEE Journal on Selected Areas in Communications.

[3]  Abbas Jamalipour,et al.  Wireless communications , 2005, GLOBECOM '05. IEEE Global Telecommunications Conference, 2005..

[4]  Xianbin Wang,et al.  Performance of multiuser MIMO communication system using chirp modulation , 2013, 2013 International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS).

[5]  John G. Proakis,et al.  Digital Communications , 1983 .

[6]  S.E. El-Khamy,et al.  Efficient multiple-access communications using multi-user chirp modulation signals , 1996, Proceedings of ISSSTA'95 International Symposium on Spread Spectrum Techniques and Applications.

[7]  Laurence B. Milstein,et al.  Coherent DS-CDMA performance in Nakagami multipath fading , 1995, IEEE Trans. Commun..

[8]  D. Owen.  Handbook of Mathematical Functions with Formulas , 1965 .

[9]  Seokho Yoon,et al.  Symbol error rate of the dm-mpsk under the influence of jamming signals , 2009, IEEE Communications Letters.

[10]  Achim Hein.  Processing of SAR Data: Fundamentals, Signal Processing, Interferometry , 2003 .

[11]  Dirk Dahlhaus,et al.  Downlink performance analysis of a CDMA mobile radio system with chirp modulation , 1999, 1999 IEEE 49th Vehicular Technology Conference (Cat. No.99CH36363).

[12]  Chintha Tellambura,et al.  Error rates for Nakagami-m fading multichannel reception of binary and M-ary signals , 2001, IEEE Trans. Commun..

[13]  J. Crank.  Tables of Integrals , 1962 .

[14]  James S. Harris,et al.  Tables of integrals , 1998 .

[15]  C. Campbell.  Surface Acoustic Wave Devices and Their Signal Processing Applications , 1989 .