CTH10-6: Diagonal Block Space-Time Code Design for Continuous-Phase Modulation

The combination of space-time (ST) coding and continuous-phase modulation (CPM) is attractive for power-efficient transmission over fading channels. In this paper, we propose a diagonal block based ST-CPM (DBST-CPM) scheme, which in addition to high power efficiency facilitates detection without channel state information at the receiver. DBST-CPM can be regarded as a non-trivial extension of well-known differential ST modulation (DSTM) with diagonal signal matrices for linear modulation formats. We derive an upper bound on the frame- error rate of DBST-CPM and we present an efficient algorithm for optimization of the code parameters of DBST-CPM. Numerical and simulation results show that the upper bound accurately predicts the performance of DBST-CPM and that the proposed code optimization yields highly power-efficient designs.