Sequential Decoding for Simultaneous Wireless Information and Power Transfer

Adopting the concept of simultaneous wireless infor- mation and power transfer (SWIPT), applied over an integrated architecture of receiver, we propose a solution for an improved information decoder. Our research concludes to an enhanced performance with dual objective of pursuing a lower symbol error rate, while at the same time achieving the highest energy harvested in the battery. Information is conveyed by the intensity power levels of the signal, while with the use of pulse energy detection techniques, we can successfully decode it through the energy variation of the receiver. Our contribution, relies on a new sophisticated detection scheme, for non-coherent sequential detection in the integrated receiver. A Viterbi-type trellis-search algorithm, combined with selective store strategy is applied, resulting in a low-complexity, while at the same time more efficient in terms of memory requirements. Simulation results, approach the numerical ones as the observation window L → ∞, thus demonstrating that our proposed sequential decoder leads to a novel SWIPT solution with gains, in terms of SER, lower computational complexity, high energy harvested and memory efficiency