Adaptive Sphere Decoder For 1-Bit Adc Mimo-Constant Envelope Modulation Detection

In this paper, a low complexity MIMO detection is proposed for MIMO-Constant Envelope Modulation (MIMOCEM) transceiver system. In which, an adaptive sphere decoder (SD) based on an affine linear transformation model is proposed to adaptively select a small number of candidate sequences from all lattice states. Then, the more accurate ( the more complex) IF based maximum likelihood MIMO-CEM decoder (MLD) is used to estimate the transmit sequence that the most likely to be transmitted from the selected candidates.