  Recently, Guo and Xia introduced low complexity decoders called Partial
Interference Cancellation (PIC) and PIC with Successive Interference
Cancellation (PIC-SIC), which include the Zero Forcing (ZF) and ZF-SIC
receivers as special cases, for point-to-point MIMO channels. In this paper, we
show that PIC and PIC-SIC decoders are capable of achieving the full
cooperative diversity available in wireless relay networks. We give sufficient
conditions for a Distributed Space-Time Block Code (DSTBC) to achieve full
diversity with PIC and PIC-SIC decoders and construct a new class of DSTBCs
with low complexity full-diversity PIC-SIC decoding using complex orthogonal
designs. The new class of codes includes a number of known full-diversity
PIC/PIC-SIC decodable Space-Time Block Codes (STBCs) constructed for
point-to-point channels as special cases. The proposed DSTBCs achieve higher
rates (in complex symbols per channel use) than the multigroup ML decodable
DSTBCs available in the literature. Simulation results show that the proposed
codes have better bit error rate performance than the best known low
complexity, full-diversity DSTBCs.
