Power and rate adaptations in multicarrier DS/CDMA communications over rayleigh fading channels
- Authors
- Lee, YH[Lee, Ye Hoon]; Kim, SY[Kim, Sun Yong]; Yoon, S[Yoon, Seokho]
- Issue Date
- Dec-2007
- Publisher
- IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG
- Keywords
- code division multiaccess; adaptive systems; rayleigh channels
- Citation
- IEICE TRANSACTIONS ON COMMUNICATIONS, v.E90B, no.12, pp.3598 - 3605
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEICE TRANSACTIONS ON COMMUNICATIONS
- Volume
- E90B
- Number
- 12
- Start Page
- 3598
- End Page
- 3605
- URI
- https://scholarworks.bwise.kr/skku/handle/2021.sw.skku/83518
- DOI
- 10.1093/ietcom/e90-b.12.3598
- ISSN
- 0916-8516
- Abstract
- We consider power and rate adaptations in multicarrier (MC) direct-sequence code-division multiple-access (DS/CDMA) communications under the assumption that channel state information is provided at both the transmitter and the receiver. We propose, as a power allocation strategy in the frequency domain, to transmit each user's DS waveforms over the user's sub-band with the largest channel gain, rather than transmitting identical DS waveforms over all sub-bands. We then adopt channel inversion power adaptation in the time domain, where the target user's received power level maintains at a fixed value. We also investigate rate adaptation in the time domain, where the data rate is adapted such that a desired transmission quality is maintained. We analyze the BER performance of the proposed power and rate adaptations with fixed average transmission power, and show that power adaptation in both the frequency and the time domains or combined power adaptation in the frequency domain and rate adaptation in the time domain make significant performance improvement over the power adaptation in the frequency domain only. We also compare the performance of the proposed power and rate adaptation schemes in MC-DS/CDMA systems to that of power and rate adapted single carrier DS/CDMA systems with RAKE receiver.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - Information and Communication Engineering > School of Electronic and Electrical Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.