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Joint adaptive modulation and power allocation for variable-rate space-time block codes
- Authors
- Kim, Jung-Bin; Kim, Dongwoo
- Issue Date
- Jan-2008
- Publisher
- Institute of Electrical and Electronics Engineers
- Keywords
- space-time block code (STBC); variable-rate STBC; adaptive modulation; power allocation
- Citation
- IEEE Communications Letters, v.12, no.1, pp 26 - 28
- Pages
- 3
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE Communications Letters
- Volume
- 12
- Number
- 1
- Start Page
- 26
- End Page
- 28
- ISSN
- 1089-7798
1558-2558
- Abstract
- Variable-rate space-time block codes (vr-STBCs) without any feedback can support different transmission rates and unequal error protection (UEP) which are needed for multimedia communications. Assuming necessary feedback, in this letter, we introduce a joint adaptive modulation and power allocation (AMP) for vr-STBCs so as to maximize the total throughput under constraints of transmit power limit and error requirements. Based on a Lagrangian multiplier method, optimum modulation orders and power levels are provided for the transmitter. Numerical results show that the proposed AMP enhances the throughput of existing vr-STBCs up to 20% with very limited feedback, e.g., at most 3-5 bits feedback.
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Related Researcher
- Kim, Dong woo
- ERICA 공학대학 (SCHOOL OF ELECTRICAL ENGINEERING)