Recent advances in single-carrier distributed antenna network
Wireless Communications & Mobile Computing
Recursive QR packet combining for uplink single-carrier multi-user MIMO HARQ using near ML detection
Wireless Communications & Mobile Computing
Iterative Overlap QRM-ML Block Detection for Single-Carrier MIMO Transmission Without CP Insertion
Wireless Personal Communications: An International Journal
Hi-index | 0.00 |
This paper presents a new maximum likelihood detection (MLD)-based signal detection method for orthogonal frequency division multiplexing (OFDM) multiple input multiple output (MIMO) multiplexing with frequency domain spreading and code multiplexing. The proposed MLD reduces the computational complexity by utilizing signal orthogonalization based on QR decomposition of the product of the channel and spreading code matrices. Simulation results show that when the spreading factor and number of code multiplexing are 16, the proposed MLD reduces the average received signal energy per bit-to-noise spectrum density ratio (Eb/N0) for the average packet error rate (PER) of 10-2 by approximately 12 dB compared to the conventional minimum mean squared error (MMSE)-based filtering for 4-by-4 MIMO multiplexing (16QAM with rate-3/4 Turbo code is assumed).