# Ultra-Low-Power Wide Range Backscatter Communication Using Cellular Generated Carrier +
## 2 Background
### Related Work  
Although significant research progress and developments have been been made in the domain of backscatter communications, to the best of our knowledge, there is currently no study available on the coverage aspects of a BC system based on a cellular generated carrier. The reference [13] provides an overview of LPWAN, whereas [PERSON] et al. provides the coverage and capacity analysis of several LPWAN technologies in an indoor and outdoor environment using existing cellular sites [29]; however, a backscatter communication system was not considered in their analysis. The topic of BC and AmBC is catching the attention of the researchers in both industry and academia, and the number of studies and surveys related to AmBC are now available in the literature [22; 20; 30; 31]. The concept of harvesting the energy from RF signal is also well supported in case of backscatter communication, and the research on the energy harvesting can be witnessed in references [32; 33]. The trade-off between the data rate and the quantity of harvested energy were displayed and discussed in [28]. A BC scenario for cognitive wireless networks, as developed by [PERSON] et al. [34], proposed an effective method to improve the network performance that a secondary user powered by radio signals take advantage of the transmission energy of the primary user. A game-theoretic time allocation problem was proposed to improve the network throughput, and an optimal time allocation ratio of energy harvest and backscatter was obtained. [PERSON] et al. [35] conducted research on multiple access (MA) hybrid backscatter communication to transmit radio power.  
The work by [PERSON] et al. [36] discussed the bit-error-rate (BER) when detecting one-bit information in the backscatter communication network. The energy requirements of each channel to detect this information were analysed. [PERSON] et al. [31] proposed a fixed channel model for information transfer and energy harvest in a cognitive wireless network. The active information transmission of the BD is optimized for an optimal throughput in their work. Users are capable of collaborating by using radio power transmission, according to [PERSON] et al. [37]. They displayed performance improvement of the network results from backscatter-assisted cooperation, compared with the normal active information transmission. [PERSON] et al. developed a MAC protocol that operates with network devices and BDs [38] to improve the network throughput and energy efficiency. [PERSON] et al. [39] investigated the beamforming design optimization problem that maximizes the transmission capacity, and provided an exact penalty method that can achieve the capacity closed to the upper bound. [PERSON] et al. [40] discussed the interference cancellation problem of Bistatic backscatter communication system and developed a optimal detector to cancel the direct path interference. [PERSON] et al. established good practices for the design of IoT devices with a focus on two main design challenges i.e., power consumption and the connectivity, and discussed the challenges of resource constrained IoT devices [10]. In this work, we have used the sensitivity levels and the receiver design criteria of different existing technologies, i.e., LoRa backscatter, NB-IoT, and BLE5, for evaluating the coverage and feasibility of a cellular generated carrier based backscatter communication system in our case study.