A Branch-and-Bound Method for Power Minimization of IDMA

M.S.K. Lau, Wuyi Yue, Peng Wang, Li Ping
2008 IEEE Transactions on Vehicular Technology  
This paper tackles a power minimization problem of interleave-division multiple-access (IDMA) systems over a fading multiple-access channel. The problem is minimizing the total power received by the receiver while keeping the bit error rates (BERs) of all users below a predefined value. The original formulation of the problem has highly nonlinear and implicitly defined functions, which render most existing optimization methods inca- pable. A new formulation is proposed in this paper, whose
more » ... s paper, whose solution can effectively be obtained by a branch-and-bound (B&B) technique. An algorithm is devised based on B&B, and its effectiveness is also demonstrated by numerical experiments of systems with a moderate numbers of users. Index Terms-Branch-and-bound (B&B), code-division multiple access (CDMA), interleave-division multiple access (IDMA), iterative multiuser detection (MUD), optimization, power allocation.
doi:10.1109/tvt.2008.919617 fatcat:mdi3ehy2hzcpngxqedgqgania4