Performance of decision-feedback equalizers with dual antenna diversity

Five equalization/diversity schemes applicable to time division multiple access (TDMA) digital cellular radio are discussed: (i) DFE with slot-by-slot diversity selection; (ii) DFE with multiple switching/training; (iii) DFE with symbol-by-symbol selection; (iv) DFE with diversity combining/selection; and (v) DFE with joint parameter optimization. Among these schemes, (i), (ii) and (iv) are newly proposed. It is shown that (i) has the lowest computational complexity but exhibits unsatisfactory performance in a multipath environment with severe fades. Scheme (v) exhibits excellent performance but it has the highest computational complexity among all schemes studied. Schemes (ii) and (iii) present comparable and reasonable performance but (ii) has lower computational complexity. Schemes (iii) and (iv) have approximately the same complexity; however, (iv) shows superior performance