New Window Functions Suitable for High Bit Rate Data Transmission in Space Communications

摘要

In recent years, the demand for transmission of large data through band-limited channels has been increasing rapidly. Since availability of spectrum is at premium, the need for bandwidth efficient modulation schemes has driven a great deal of research in this area. One such method for bandwidth efficiency is pulse shaping or windowing. By using a window function, one can reduce the power contained in the side lobes and concentrate on the signal near the carrier. In this paper, two new window functions have been and suggested and studied. Comparisons with existing window functions such as rectangular, triangular are also carried out. Power and bandwidth are the major constraints for wireless applications, particularly in space communication. All the existing windows occupy more bandwidth, but the new suggested window functions evolved here have almost same rectangular window (reference window) function, as the main lobe width but with relatively low side lobe levels.