A new algorithm for a group iterative linear Zero-Forcing (ZF) receiver for
multiple-input multiple-output (MIMO) systems is proposed in this paper. The
proposed algorithm merges between the group linear ZF receiver and V-Blast
algorithms, where the signals in every group are detected by linear ZF method and
then successive interference cancellation detection is applied between the different
groups. Three types of modulation schemes are adopted for testing this algorithm
namely; BPSK, QPSK, and 16 QAM. Simulation results show that the proposed
algorithm achieves a performance improvement over the ZF algorithm and the
grouped linear ZF algorithm at modulations (BPSK, QPSK). The proposed scheme
offers better performance gain for BPSK modulation of about 7dB and 2dB compared
with ZF and MMSE schemes respectively at BER of 10-3. On the other hand, the
proposed scheme offer better performance gain of about 3dB and 1dB compared with
ZF and minimum mean square error schemes for QPSK modulation at BER 10-3.
However, at using modulation of (16QAM), the performance of the proposed
algorithm is almost the same as that of the aforementioned algorithms. A little
increase of computational complexity is noticed with this proposed algorithm
compared with both the ZF, MMSE and the grouped linear ZF algorithms.