| A linear fractional semidefinite relaxation approach to maximum-likelihood detection of higher-order QAM OSTBC in unknown channe Recent countries visiting this post |  |
 | 5 | United States |
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| A linear fractional semidefinite relaxation approach to maximum-likelihood detection of higher-order QAM OSTBC in unknown channe Recent countries visiting this post | |
| 5 | United States |
| 1 | Russian Federation |