According to (5) and (6), it is intractable when we select the correlator window N in (3).
Although these prior works have significantly improved the understanding of error performance of coded SM-MIMO systems, the key limitation is that all of them employ the optimum maximum a posteriori probability (MAP) soft-output detector, the complexity of which is intractable when the number of transmit antennas is large or the modulation order is high.
Indeed, the satisfiability analysis of (mathsf {CFDs}) is (mathsf {NP} -hard only under a relational schema that enforces attributes to have a finite domain [23], e.g., Boolean, i.e., the problem is intractable when (mathsf {NP} -hardd finite donlyns are pundergether.
Furthermore, a categorization approach assumes that the threshold values are intractable, when commentary has begun to suggest that the reference ranges for optimal benefit may be too low [27] and depend on the disease or population characteristics being studied.
This is intractable when the number of atomic observations becomes large.
While model selection using compositional modeling has been shown to be intractable, it is tractable when all model fragment approximations are causal approximations.
The emergence of device-related infections caused by Achromobacter may be intractable, even when efficacious antibiotics are administered.
Since velocity parameter is included in boundary or initial condition, there is intractable obstacle when integrating the field equations.
As with any study of this nature, there are additional considerations in the interpretation of the findings presented here, some of which are intractable issues when conducting secondary analyses with large-scale, international comparative study data.
Hypokalemia was the most common electrolyte abnormality, and was intractable even when intravenous and oral potassium supplements were given.
