Abstract
Multiple access is the ability of many users to communicate with each other while sharing a common transmission medium. Wireless multiple-access communications are facilitated if the transmitted signals are orthogonal or separable in some sense. Signals may be separated in time (time-division multiple access or TDMA), frequency ( frequency-division multiple access or FDMA), or code (code-division multiple access or CDMA).CDMA is realized by using spread-spectrum modulation while transmitting signals from multiple users in the same frequency band at the same time. All signals use the entire allocated spectrum, but the spreading sequences or frequency-hopping patterns differ. Information theory indicates that in an isolated cell, CDMA systems achieve the same spectral efficiency as TDMA or FDMA systems only if optimal multiuser detection is used. However, even with single-user detection, CDMA is advantageous for cellular networks because it eliminates the need for frequency and time-slot coordination among cells, allows carrier-frequency reuse in adjacent cells, and imposes no sharp upper bound on the number of users.
References
F. Adachi, M. Sawahashi, and K. Okawa, “Tree-structured Generation of Orthogonal Spreading Codes with Different Lengths for Forward Link of DS-CDMA Mobile Radio,” IEE Electronics Letters, pp. 27-28, Jan. 1997.
D. S. Saini and M. Upadhyay, “Multiple Rake Combiners and Performance Improvement in 3G and Beyond WCDMA Systems,” IEEE Trans. Veh. Technol., vol. 58, pp. 3361–3370, Sept. 2009.
D. V. Sarwate and M. B. Pursley, “Crosscorrelation Properties of Pseudorandom and Related Sequences,” Proc. IEEE, vol. 68, pp. 593–619, May 1980.
M. B. Pursley, “Spread-Spectrum Multiple-Access Communications,” in Multi-User Communications Systems, G. Longo, ed., New York: Springer-Verlag, 1981.
M. B. Pursley, D. V. Sarwate, and W. E. Stark, “Error Probability for Direct-Sequence Spread-Spectrum Multiple-Access Communications—Part 1: Upper and Lower Bounds,” IEEE Trans. Commun., vol. 30, pp. 975–984, May 1982.
A. R. Hammons and P. V. Kumar, “On a Recent 4-Phase Sequence Design for CDMA,” IEICE Trans. Commun., vol. E76-B, pp. 804–813, Aug. 1993.
T. G. Macdonald and M. B. Pursley, “The Performance of Direct-Sequence Spread Spectrum with Complex Processing and Quaternary Data Modulation,” IEEE J. Select. Areas Commun., vol. 18, pp. 1408–1417, Aug. 2000.
S. Xie and S. Rahardja, “Performance Evaluation for Quaternary DS-SSMA Communications with Complex Signature Sequences over Rayleigh-fading Channels,” IEEE Trans. Wireless Commun., vol. 4, pp. 266–77, Jan. 2005.
D. Torrieri, “Performance of Direct-Sequence Systems with Long Pseudonoise Sequences,” IEEE J. Select. Areas Commun., vol. 10, pp. 770–781, May 1992.
G. Zang and C. Ling, “Performance Evaluation for Band-limited DS-CDMA Systems Based on Simplified Improved Gaussian Approximation,” IEEE Trans. Commun., vol. 51, pp. 1204–1213, July 2003.
D. Torrieri, “Instantaneous and Local-Mean Power Control for Direct-Sequence CDMA Cellular Networks,” IEEE Trans. Commun., vol. 50, pp. 1310–1315, Aug. 2002.
G. Stuber, Principles of Mobile Communication, 2nd ed. Boston: Kluwer Academic, 2001.
I. S. Gradsteyn and I. M. Ryzhik, Tables of Integrals, Series, and Products, 6th ed. San Diego: Academic Press, 2000.
M. Zorzi, “On the Analytical Computation of the Interference Statistics with Applications to the Performance Evaluation of Mobile Radio Systems,” IEEE Trans. Commun., vol. 45, pp. 103–109, Jan. 1997.
C. C. Lee and R. Steele, “Closed-loop Power Control in CDMA Systems,” IEE Proc.-Commun., vol. 143, pp. 231–239, Aug. 1996.
B. Levy, Principles of Signal Detection and Parameter Estimation. New York: Springer, 2008.
A. J. Viterbi, CDMA Principles of Spread Spectrum Communication. Reading, MA: Addison-Wesley, 1995.
C. Ding, Y. Yang, and X. Tang, “Optimal Sets of Frequency Hopping Sequences from Linear Cyclic Codes,” IEEE Trans. Inf. Theory, vol. 56, pp. 3605–3612, July 2010.
D. Peng and P. Fan, “Lower bounds on the Hamming auto- and cross correlations of frequency-hopping sequences,” IEEE Trans. Inf. Theory, vol. 50, pp. 2149–2154, Sept. 2004.
D. Torrieri, “Mobile Frequency-Hopping CDMA Systems,” IEEE Trans. Commun., vol. 48, pp. 1318–1327, Aug. 2000.
F. Adachi and J. D. Parsons, “Unified Analysis of Postdetection Diversity for Binary Digital FM Radio,” IEEE Trans. Veh. Technol., vol. 37, pp. 189–198, Nov. 1988.
D. Torrieri, Principles of Secure Communication Systems, 2nd ed. Boston: Artech House, 1992.
J. G. Proakis and M. Salehi, Digital Communications, 5th ed. New York: McGraw-Hill, 2008.
S. Verdu, Multiuser Detection. New York: Cambridge University Press, 1998.
X. Wang and H. V. Poor, Wireless Communication Systems, Upper Saddle River, NJ: Prentice-Hall, 2004.
S. Haykin, Adaptive Filter Theory, 4th ed. Upper Saddle River, NJ: Prentice-Hall, 2002.
S. P. Weber, J. G. Andrews, X. Yang, and G. de Veciana, “Transmission Capacity of Wireless Ad Hoc Networks with Successive Interference Cancellation,” IEEE Trans. Inf. Theory, vol. 53, pp. 2799–2812, Aug. 2007.
M. Sawahashi, K. Higuchi, H. Andoh, and F. Adachi, “Experiments on Pilot Symbol-Assisted Coherent Multistage Interference Canceller for DS-CDMA Mobile Radio,” IEEE J. Select. Areas Commun., vol. 20, pp. 433–449, Feb. 2002.
X. Tan and J. M. Shea, “An EM Approach to Multiple-Access interference Mitigation in Asynchronous Slow FHSS Systems,” IEEE Trans. Wireless Commun., vol. 7, pp. 2661-2670, July 2008.
Author information
Authors and Affiliations
Rights and permissions
Copyright information
© 2011 Springer Science+Business Media, LLC
About this chapter
Cite this chapter
Torrieri, D. (2011). Code-Division Multiple Access. In: Principles of Spread-Spectrum Communication Systems. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-9595-7_6
Download citation
DOI: https://doi.org/10.1007/978-1-4419-9595-7_6
Published:
Publisher Name: Springer, New York, NY
Print ISBN: 978-1-4419-9594-0
Online ISBN: 978-1-4419-9595-7
eBook Packages: EngineeringEngineering (R0)