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Space-time block codes: A capacity perspective
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DOI：10.1109/4234.898716.png)
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Space-time block codes are a remarkable modulation scheme discovered recently for the multiple antenna wireless channel. They have an elegant mathematical solution for providing full diversity over the coherent, flat-fading channel, In addition, they require extremely simple encoding add decoding. Although these codes provide full diversity at low computational costs, we show that they incur a loss in capacity because they convert the matrix channel into a scalar AWGN channel whose capacity is smaller than the true channel capacity. In this letter the loss in capacity is quantified as a function of channel rank, code rate, and number of receive antennas.
Keyword:
block codes
diversity methods
fading channels
MIMO systems
modulation coding
期刊
IF:
4.4
论文数:
1.3W
被引数:
2.2W
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