Collaborative communications using bit-Interleaved coded DPSK with cyclic delay diversity

We propose a new scheme for collaborative (or cooperative) communications using bit-Interleaved coded differential PSK with cyclic delay diversity in orthogonal frequency-division multiplexing (OFDM). bit-interleaved coded DPSK with cyclic delay diversity in OFDM can cope with the increased frequency selectivity, and enable picking up the spatial diversity in frequency-selectivity channels with unknown delay spread, conditioned on the minimum free distance dfree of the convolutional codes. Therefore, we show that our proposed collaborative technique can obtain an arbitrary number of diversity to dfree by transforming the spatial diversity into frequency diversity. Beside this scheme does not need channel estimation and recognition of the number of collaborative nodes.