Joint design of interpolation filters and decision feedback equalizers

Abstract—This paper presents an algorithm to design jointly in-terpolation filters and decision feedback equalizers in the sense of minimum mean-square error such that the joint capacity which is neglected in conventional design is explored to improve the re-ceiver performance. The algorithm comprises an iteration of two alternating simple quadratic minimizing operations and ensures convergence. A simulation example for the raised-cosine channel demonstrates that via this approach an improvement over the con-ventional design can be achieved. Index Terms—Alternating coordinates minimization algorithm, decision feedback equalizers, interpolation filters. I