Energy Efficient Parameters for Controlling Physical Layer of Mobile Ad-Hoc Networks Sandip Vijay 1 and S.C.Sharma 2 1 Research Scholar,Computer & Electronics Engg. Discipline, I.I.T. Roorkee, Saharanpur Campus. 2 Associate Professor, Computer & Electronics Engg. Discipline, I.I.T. Roorkee, Saharanpur Campus. Abstract. This paper we simulate the effects of a channel of Mobile Ad-Hoc Network; white Gaussian noise is added to the waveform. The amount of noise to add is determined by the E b / N 0 ratio and the energy per bit of the waveform. Energy per bit of the waveform can be calculated by squaring the real and imaginary parts separately and adding them together. This decision is based on comparing the distance between each possible symbol and finding the closest one received. This paper begins with a brief overview of some of the interference of white Gaussian noise in Mobile Ad-hoc Networks waveform. We have taken FHSS and DSSS Bandwidth with transmitted power as 75 and 5 MHz respectively, with 1 and 0.75mW transmitted power. The MATLAB has been used for the simulation. Index Term- E b / N 0, Wireless Protocol. White Gaussian Noise. GFSK, CRC. 1 Introduction. A mobile ad-hoc network is a collection of wireless nodes that can communicate with each other without any dependence on a fixed infrastructure or centralized ad- ministration (see Figure 1). Nodes within transmission range can communicate direct- ly with each other, but those out of range must rely on other nodes to forward along packets to their final destination. Because they can be deployed quickly and require no extra planning, ad-hoc networks are often useful for establishing temporary work- groups in classroom settings, business meetings, or disaster relief situations[1]. GESTS Int’l Trans. Computer Science and Engr., Vol.49, No.1 93 ⓒGESTS-Oct.2008