Performance evaluation of a DDST based SIMO SC system with PAPR reduction

In this paper we concentrate on the symbol level peak to average power ratio (PAPR) increase caused by a data dependent superimposed pilot sequence. Because we add the pilot sequence on top of the user data symbols, the dynamic range of the transmitted signal may increase significantly. We propose the usage of a simple limiter in the transmitter and a hard symbol estimate based iterative estimator for the receiver. We show by simulations that if we allow a modest increase in the symbol level PAPR, the spectral efficiency of the data dependent superimposed pilot based system is better than the traditional time domain multiplexed pilot based system in a block fading channel.