Analysis of Low Power Transmitters for Wireless Micro Sensor Networks

In recent years, distributed wireless micro sensor networks will ensure the reliable and fault tolerant monitoring of wireless transmissions. Such micro sensors are required to operate for years with a small energy source. The working conditions of the sensor network are quite different from those of conventional wireless hand-held devices. These sensors requires communication of short packets in small area, start-up time plays a vital role in energy efficiency of transmission. One of the major challenges in constructing such networks is to maintain long network lifetime with less energy consumption. To achieve this goal, low power research is concentrated in the Wireless Sensor Network (WSN). Here, the high performance, CMOS integrated transmitters (low power CMOS FSK and MPSK modulators) are designed using 0.18 μm CMOS technology. The performance of the proposed transmitters are analyzed and the power consumption is halfly reduced for MPSK and 7 mW for FSK modulator.