“…With the growing demand for the Internet of Things (IoT), receivers that comply with the 2.4 GHz Bluetooth low energy(BLE) standard are one of the most attractive candidates for wireless sensor applications with low power consumption, short-range, high data rate for wearable devices such as smart bracelets and smartphones that require low-power wireless data links [1,2,3,4,5,6,7,8,9,10,11,12]. Low-power design is an important requirement for BLE systems to extend battery life and long-term stable operation [6,13,14,15].…”