On the design of transmit signals for single frequency networks with distributed transmit antennas

This paper considers how designing transmit signals improves performance of single frequency networks (SFNs) employing distributed transmit antennas, one transmit signal based on interleaved-partition subcarrier grouping is proposed. Pairwise error probability is derived to show that the achievable diversity order of the proposed transmit signal in SFNs depends on the number of resolvable channel taps between transmit and receive antennas. Moreover, we show that different interleaving methods result in different performance due to asynchronous delays caused by unequal distances between distributed transmit antennas and mobile receivers. To optimize the proposed transmit signal, one interleaving scheme, establishing a tradeoff between mobile receivers´ location and performance, is introduced in terms of the asynchronous delays. Simulation results are presented in a representative scenario to demonstrate the performance gains offered by the proposed optimum transmit signal.