We present a counterexample to a lower bound for power domination number given in Liao, Power domination with bounded time constraints, J. Comb. Optim., in press 2014. We also define the power propagation time and make connections between the power domination propagation ideas in Liao and the (zero forcing) propagation time in Hogben et al, Propagation time for zero forcing on a graph, Discrete...

In this paper a number of pilot-based channel estimation techniques are investigated for a multiple antenna system using the zero-forcing algorithm. The techniques are tested in typical indoor and outdoor (vehicular) channels. Performance results are presented in terms of bit error rate, mean squared error and data throughput. It is found that different pilot strategies offer the best performan...

In this paper, the resource allocation problem for multi-user SC-FDMA uplink systems with zero forcing equalizers is investigated. By the use of the equal power allocation, the problem of maximizing the total achievable rate with separate power constraints is transformed to the problem of subcarrier allocation to users. In this paper, iterative subcarrier allocation schemes are proposed to impr...

We present a counterexample to a lower bound for the power domination number given in Liao, Power domination with bounded time constraints, J. Comb. Optim. 31 (2016): 725–742. We also define the power propagation time, using the power domination propagation ideas in Liao and the (zero forcing) propagation time in Hogben et al, Propagation time for zero forcing on a graph, Discrete Appl. Math., ...

5 We present a counterexample to a lower bound for power domination number given in Liao, Power 6 domination with bounded time constraints, J. Comb. Optim., in press 2014. We also define the power 7 propagation time and make connections between the power domination propagation ideas in Liao and the 8 (zero forcing) propagation time in Hogben et al, Propagation time for zero forcing on a graph, ...