Integrated error control and power control for DS-CDMA multimedia wireless communications

Integrated error control and power control for DS-CDMA multimedia wireless communications

For access to this article, please select a purchase option:

Buy article PDF
(plus tax if applicable)
Buy Knowledge Pack
10 articles for $120.00
(plus taxes if applicable)

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Your details
Why are you recommending this title?
Select reason:
IEE Proceedings - Communications — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

The paper studies a packetised direct sequence code division multiple access (DS-CDMA) wireless network for providing multimedia services to mobile users. A strategy for integrating transmission error control with power control is presented and evaluated for the reverse link transmission where orthogonal signalling and noncoherent demodulation are necessary. For delay insensitive traffic requiring a very low bit error rate (BER), convolutional coding and an automatic retransmission request (ARQ) protocol are used to guarantee the transmission accuracy. By using the modified Viterbi decoder for decoding error detection, power control based on the received Eb/I0 (the ratio of signal energy per bit to interference-and-noise density) is employed to minimise the total received power at the base station, resulting in a maximal frequency spectrum efficiency. Numerical results are presented to evaluate the optimal received Eb/I0 value, the system radio frequency spectrum efficiency, and the optimal packet length, given the required BER and the traffic type. It is shown that the spectrum efficiency can be significantly increased by using an ARQ protocol with integrated optimal power control and convolutional coding for delay insensitive traffic.


    1. 1)
      • A.J. Viterbi , A.M. Viterbi , E. Zehavi . Performance of power controlledwideband terrestrial digital communications. IEEE Trans. Commun. , 4 , 559 - 569
    2. 2)
      • Wu, J.T.-H., Geraniotis, E.: `Power control in multi-media CDMA networks', Proceedings of IEEE 45th Vehicle Technology conference, VTC'95, July 1995, Chicago, p. 789–793.
    3. 3)
      • Manji, S., Zhuang, W.: `Reverse link power control for packetized DS-CDMAin a slowly Rayleigh fading environment', Proceedings of IEEE international conference Communications,ICC'97, June 1997, Montreal, Canada, p. 101–105.
    4. 4)
      • Yun, L.C., Messerschmitt, D.G.: `Variable quality of service in CDMA systemsby statistical power control', Proceedings of IEEE international conference Communications,ICC'95, June 1995, Seattle, p. 713–719.
    5. 5)
      • S. Hanley . An algorithm for combined cell-site selection and power control to maximize cellular spread spectrum capacity. IEEE J. Sel. Areas Commun. , 7 , 1332 - 1340
    6. 6)
      • Soleimanipour, M., Zhuang, W., Freeman, G.H.: `Modeling and resource allocation in wireless multimedia CDMA systems', Proceedings of IEEE 48th Vehicle Technology conference, VTC'98, May 1998, Ottawa, p. 1279–1283.
    7. 7)
      • K.S. Gilhousen , I.M. Jacobs , R. Padovani , A.J. Viterbi , L.A. Weaver , C.E. Wheatley . On the capacity of a cellular CDMA system. IEEE Trans. Veh. Technol. , 2 , 472 - 480
    8. 8)
      • L.K. Rasmussen , S.B. Wicker . Trellis-coded, type-I hybrid-ARQ protocolsbased on CRC error detecting codes. IEEE Trans. Commun. , 10 , 2569 - 2575
    9. 9)
      • H. Yamamoto , K. Itoh . Viterbi decoding algorithm for convolutional codeswith repeat request. IEEE Trans. Inf. Theory , 5 , 540 - 547
    10. 10)
      • B.A. Harvey , S.B. Wicker . Packet combining systems based on the Viterbi decoder. IEEE Trans. Commun. , 1544 - 1557
    11. 11)
      • Chak, J., Zhuang, W.: `Connection admission control for indoor multimediawireless communications', Proceedings of IEEE 48th Vehicle Technology conference, VTC'98, May 1998, Ottawa, p. 2570–2574.
    12. 12)
      • A.J. Viterbi . Very low rate convolutional codes for maximum theoretical performance of spread-spectrum multiple-access channels. IEEE J. Sel. Areas Commun. , 4 , 641 - 649
    13. 13)
      • A.J. Viterbi . (1995) CDMA: principles of spread spectrum communications.
    14. 14)
      • Odenwalder, J.P.: `Optimal decoding of convolutional codes', 1970, PhD, Univ. of California, Dept. of Systems SciencesSchool of Engineering and Applied Science, Los Angeles.
    15. 15)
      • K.J. Larsen . Short convolutional codes with maximal free distance for rates 1/2, 1/3,and 1/4. IEEE Trans. Inf. Theory , 3 , 371 - 372
    16. 16)
      • J.G. Proakis . (1995) Digital communications.

Related content

This is a required field
Please enter a valid email address