Science will produce smaller and smaller gains in the non-linear domain, in spite of the enormous resources it will consume; instead it will start focusing on what it cannot-and should not-do.

A new method of broadband focusing matrix design for linear array is proposed in this paper.

Focusing on the problem that existing linear dispersion (LD) space-time codes have a high encoding and decoding complexity, a type of orthogonal linear dispersion (OLD) space-time codes is proposed.