Differential Diversity-Embedding Space Time Block Coding

Diversity-embedding space time block coding (DE- STBC) introduced in enables unequal error protection (UEP) using multiple transmit antennas. Even though these codes do not require channel state information (CSI) at the transmitter, they do need it at the receiver for decoding. A differential scheme is proposed in this paper to eliminate the need for channel estimation at the receiver which is especially costly with multiple transmit and receive antennas. Since most previously proposed differential schemes in the literature are based on orthogonal STBC, they are not applicable to the non-orthogonal family of DE-STBC considered in this paper.