Perfect Low Power Narrowband Transmitters for Dense Wireless Sensor Networks

Abstract

This paper presents the backgrounds of approach to optimization and design of software defined adaptive feedback communication systems (AFCS) for applications at the physical (PHY) layer of wireless sensor networks. A particular feature of AFCS is they transmit the signals from digital or analog sensors to the base stations (BS) using pulse-amplitude (PAM) modulators adaptively adjusted by the controls formed in BS, no coding. Absence of coders permits to derive optimal transmission-reception algorithms determining the way of optimal AFCS design. Adaptive properties of the systems permit to transmit data to BS perfectly, i.e. with energy and spectral efficiencies attaining Shannon's limits. The not used before adequate measures of AFCS performance are discussed and used for investigation of designed prototype of optimal AFCS functioning. Optimal AFCS may become a perspective class of high efficient narrowband low energy communication channels for the wireless sensor networks.