The Application of Rate Adaptation with Finite Alphabet in MIMO-OFDM

To maximize the spectral efficiency of MIMO-OFDM 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 fil...

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Vydané v:2005 5th International Conference on Information Communications and Signal Processing s. 946 - 949
Hlavní autori: Jinliang Huang, Signell, S.
Médium: Konferenčný príspevok..
Jazyk:English
Vydavateľské údaje: IEEE 2005
Predmet:
Adaptive control
Bit error rate
Block codes
Channel state information
Fading
Filling
MIMO
Power control
Programmable control
Transmitters
ISBN:9780780392830, 0780392833
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Popis
Shrnutí:To maximize the spectral efficiency of MIMO-OFDM 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
ISBN:9780780392830
0780392833
DOI:10.1109/ICICS.2005.1689189