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A computationally efficient criterion for antenna shuffling in DSTTD systems
- Authors
- Joung, J.; Jeong, E.-R.; Lee, Y.H.
- Issue Date
- Sep-2007
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Antenna shuffling; Double space-time transmit diversity (DSTTD); Multiple-input multipleoutput (MIMO); Space-time block code
- Citation
- IEEE Communications Letters, v.11, no.9, pp 732 - 734
- Pages
- 3
- Journal Title
- IEEE Communications Letters
- Volume
- 11
- Number
- 9
- Start Page
- 732
- End Page
- 734
- ISSN
- 1089-7798
1558-2558
- Abstract
- The application of double space-time transmit diversity (DSTTD) scheme to multicarrier systems, such as orthogonal frequency division multiplexing (OFDM) systems, requires calculating the determinations of the antenna permutation matrices for all subcarriers, resulting in a heavy computation load. In this paper, we show that the signal-to-noise ratio (SNR)-based antenna shuffling criterion for DSTTD systems can be reduced to a simple criterion that evaluates determinants of 2 × 2 submatrices of the 4 × 4 equivalent channel matrix. The new criterion can lighten the computational load by about 95%. Furthermore, it is shown that the minimum mean square error (MMSE)-based criterion for antenna permutation can also be reduced to the same criterion.
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