The application of rate adaptation with finite alphabet in MIMO-OFDM
2005 (English)Conference paper (Refereed)
To maximize the spectral efficiency of MIMOOFDM under a certain target Bit Error Rate (BER) in an environment where alphabet is discrete and upper bounded, it is necessary to apply adaptive power control and rate adaptation to always find the maximal alphabet size it can support. Although water filling (WF) can achieve the capacity of MIMO fading channel theoretically, it is not a preferable power allocation strategy in practice when alphabet is finite. To get higher spectral efficiency, a modified power control based on water filling can be utilized. In this paper we will compare these bit-, power-loading algorithms in the scenario where instantaneous Channel State Information (CSI) is known to the transmitter. Besides, the Space-Time Block Coding (STBC) with rate adaptation is implemented and it turns out that STBC can even achieve higher spectral efficiency in some cases.
Place, publisher, year, edition, pages
2005. 946-949 p.
, 2005 Fifth International Conference on Information, Communications and Signal Processing, Volume 2005
Power loading algorithms, Rate adaptation, Water filling (WF), Bit error rate, Channel state information, Communication channels (information theory), Fading channels, Finite automata, Orthogonal frequency division multiplexing
Signal Processing Communication Systems
IdentifiersURN: urn:nbn:se:kth:diva-157094ScopusID: 2-s2.0-34147191018ISBN: 0780392833ISBN: 9780780392830OAI: oai:DiVA.org:kth-157094DiVA: diva2:771680
2005 Fifth International Conference on Information, Communications and Signal Processing; Bangkok; Thailand; 6 December 2005 through 9 December 2005
QC 201412152014-12-152014-12-052014-12-15Bibliographically approved