Mobile devices have become an essential part of our daily life. Different types of cellular networks exist for providing service to the mobile users. GSM is the first mobile communication system which raises the popularity of mobile services. After GSM, other kinds of wireless communication systems come into the scenario such as WCDMA, LTE etc. Each of these systems has their own pros and cons. In this paper we have performed a comparative signal analysis between these popular networks considering noise effect, bandwidth, and power using vector signal generator to draw a conclusion on their effective deployment in different scenarios. The power transmission by the base stations in an area covered by GSM, WCDMA and LTE network based on user density is determined and compared with the same using only GSM network. Simulation results present that using proposed deployment scenario 10.22-17.5% reduction in power transmission is achieved and hence it is referred as a green network.
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