Move a Game Object (Camera) forward and sideways with the Mobile Sensor Outputs. How?

I am currently working on a Virtual Reality (VR) Android Game and i want the camera (or object to which the camera is attached) to move forward and side ways as the device moves forward and sideways. The Character of the game should be able to walk and explore the scene by moving the device. I don't want to give Rotation to the camera, but just the linear movement detection. Somebody please help. Thanks !