  This paper considers coordinated linear precoding in downlink multicell
multiuser orthogonal frequency-division multiple access (OFDMA) network. A
less-complex, fast and provably convergent algorithm that maximizes the
weighted sum-rate with per base station (BS) transmit power constraint is
formulated. We approximate the nonconvex weighted sum- rate maximization (WSRM)
problem with a solvable convex form by means of sequential parametric convex
approximation (SPCA) approach. The second order cone program (SOCP)
formulations of the objective function and constraints of the optimization
problem are derived through proper change of vari- ables, first order linear
approximation and hyperbolic constraints transformation, etc. The algorithm
converges to the suboptimal solution taking fewer number of iterations in
comparison to other known iterative WSRM algorithms. Finally, numerical results
are presented to justify the effectiveness and superiority of the proposed
algorithm.
