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http://dx.doi.org/10.7840/kics.2013.38A.8.680

Generalized Combined Power and Rate Adaptations in DS/CDMA Communications over Fading Channels  

Lee, Ye Hoon (서울과학기술대학교 전자IT미디어공학과)
Kim, Dong Ho (서울과학기술대학교 전자IT미디어공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.38A, no.8, 2013 , pp. 680-687 More about this Journal
Abstract
We investigate a generalized combined power and rate adaptation scheme in direct-sequence (DS) code-division multiple-access (CDMA) communications over Nakagami fading channels. The transmission power allocated to user i is proportional to $G^p_i$, where $G_i$ is the channel gain of user i and p is a real number, and the data rate (i.e., spreading gain) is jointly adapted so that a desired QoS is maintained. We analyze the average data rate of the proposed adaptation scheme subject to fixed average and peak transmission power constraints. Our results show that the proposed joint adaptation scheme provides a significant performance improvement over power-only and rate-only adaptation.
Keywords
fading channels; code division multiple access; adaptation; combined power and rate; Nakagami;
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Times Cited By KSCI : 1  (Citation Analysis)
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1 R. Mo, Y. H. Chew, and C. C. Chai, "Capacity of DS/CDMA system under multipath fading with different adaptive rate adaptive power schemes," in Proc. IEEE Wireless Commun. Networking Conf. (WCNC 2003), vol. 1, pp. 190-195, New Orleans, U.S.A., Mar. 2003.
2 F. Berggrenn and S.-L. Kim, "Energy-efficient control of rate and power in DS-CDMA systems," IEEE Trans. Wireless Commun., vol. 3, no. 3, pp. 725-733, May 2004.   DOI   ScienceOn
3 X. Qiu and K. Chawla, "On the performance of adaptive modulation in cellular systems," IEEE Trans. Commun., vol. 47, no. 6, pp. 884-895, June 1999.   DOI   ScienceOn
4 C. C. Chai, T. T. Tjhung, and L. C. Leck, "Combined power and rate adaptation for wireless cellular systems," IEEE Trans. Wireless Commun., vol. 4, no. 1, pp. 6-13, Jan. 2005.   DOI   ScienceOn
5 P. Ligdas and N. Farvardin, "Optimizing the transmit power for slow fading channels," IEEE Trans. Inform. Theory, vol. 46, no. 2, pp. 565-576, Mar. 2000.   DOI   ScienceOn
6 M. Nakagami, "The m-distribution: a general formula of intensity distribution of rapid fading," in Statistical Methods in Radio Wave Propagation: Proc. Symp. Held Jun 18-20, 1958, pp. 3-36, Pergamon Press, 1960.
7 W. Feller, An Introduction to Probability Theory and Its Applications. Vol. II, 2nd Ed., John Wiley and Sons, 1971.
8 S. W. Kim and A. J. Goldsmith, "Truncated power control in code division multiple access communications," IEEE Trans. Veh. Technol., vol. 49, no. 3, pp. 965-972, May 2000.   DOI   ScienceOn
9 W. H. Press, S. A. Teukolsky, W. T. Vetterling, and B. P. Flanner, Numerical Recipes in C, 2nd Ed., Cambridge, 1997.
10 Y. H. Lee, "On the optimal antenna weighting method for closed-loop transmit antenna diversity with average and peak power constraints," J. Korean Inst. Commun. Inform. Soc. (KICS), vol. 32, no. 7, pp. 694-699, July 2007.   과학기술학회마을
11 A. J. Goldsmith and P. P. Varaiya, "Capacity of fading channels with channel side information," IEEE Trans. Inform. Theory, vol. 43, no. 6, pp. 1986-1992, Nov. 1997.   DOI   ScienceOn
12 M. Alouini and A. Goldsmith, "Capacity of Nakagami multipath fading channels," in Proc. IEEE Veh. Technol. Conf., vol. 1, pp. 358-362, Phoenix, U.S.A., May 1997.
13 M. Alouini and A. Goldsmith, "Capacity of Rayleigh fading channels under different adaptive transmission and diversity- combining technique," IEEE Trans. Veh. Technol., vol. 48, no. 4, pp. 1165-1181, July 1999.   DOI   ScienceOn
14 K. S. Gilhousen, I. M. Jacobs, R. Padovani, A. J. Viterbi, L. A. Weaver Jr., and C. E. Wheatley III, "On the capacity of a cellular CDMA system," IEEE Trans. Veh. Technol., vol. 40, no. 2, pp. 303-312, May 1991.   DOI   ScienceOn
15 J. Zander, "Performance of optimum transmitter power control in cellular radio systems," IEEE Trans. Veh. Technol., vol. 41, no. 1, pp. 57-62, Feb. 1992.   DOI   ScienceOn
16 S. W. Kim, "Adaptive rate and power DS/CDMA communications in fading channels," IEEE Commun. Lett., vol. 3, no. 4, pp. 85-87, Apr. 1999.   DOI   ScienceOn
17 S.-J. Oh and K. M. Wasserman, "Dynamic spreading gain control in multiservice CDMA networks," IEEE J. Sel. Areas Commun., vol. 17, no. 5, pp. 918-927, May 1999.   DOI   ScienceOn
18 S. W. Kim and Y. H. Lee, "Combined rate and power adaptation in DS/CDMA communications over Nakagami fading channels," IEEE Trans. Commun., vol. 48, no. 1, pp. 162-168, Jan. 2000.   DOI   ScienceOn
19 S.-J. Oh, D. Zhang, and K. M. Wasserman, "Optimal resource allocation in multiservice CDMA networks," IEEE Trans. Wireless Commun., vol. 2, no. 4, pp. 811-821, July 2003.
20 J. F. Hayes, "Adaptive feedback communications," IEEE Trans. Commun. Technol., vol. 16, no. 1, pp. 29-34, Feb. 1968.   DOI
21 Y. H. Lee and Y. Bar-Ness, "Power adaptation for BPSK signaling with average and peak power constraints in Rayleigh fading channels," IEEE Trans. Commun., vol. 51, no. 11, pp. 1871-1876, Nov. 2003.   DOI   ScienceOn
22 J. K. Cavers, "Variable-rate transmission for Rayleigh fading channels," IEEE Trans. Commun., vol. 20, no. 1, pp. 15-22, Feb. 1972.   DOI
23 W. T. Webb and R. Steele, "Variable rate QAM for mobile radio," IEEE Trans. Commun., vol. 43, no. 7, pp. 2223-2230, July 1995.   DOI   ScienceOn
24 Y. Kamio, S. Sampei, H. Sasaoka, and N. Morinaga, "Performance of modulation level controlled adaptive modulation under limited transmission delay time for land mobile communications," in Proc. IEEE Veh. Technol. Conf., pp. 221-225, Chicago, U.S.A., July 1995.
25 B. Vucetic, "An adaptive coding scheme for time varying channels," IEEE Trans. Commun., vol. 39, no. 5, pp. 653-663, May 1991.   DOI   ScienceOn
26 S. M. Alamouti and S. Kallel, "Adaptive trellis-coded multiple phase shift keying for Rayleigh fading channels," IEEE Trans. Commun., vol. 42, no. 6, pp. 2305-2314, June 1994.   DOI   ScienceOn
27 T. Ue, S. Sampei, and N. Morinaga, "Symbol rate and modulation level controlled adaptive modulation/TDMA/TDD for personal communication systems," in Proc. IEEE Veh. Technol. Conf., vol. 1, pp. 306-310, Chicago, U.S.A., July 1995.
28 A. J. Goldsmith and S. G. Chua, "Variable rate variable power MQAM for fading channels," IEEE Trans. Commun., vol. 45, no. 10, pp. 1218-1230, Oct. 1997.   DOI   ScienceOn