Error Ratio concept and 3 D Eye diagram to Analysis of M state digitally modulated signals

Software Defined Radio is a radio communications transceiver system in which all the typical components of a communication system such as mixers, modulators/demodulators, detectors, amplifiers are implemented through software rather than hardware. This approach is helpful because there is a scope of developing a system which is compatible with more than one mobile communication standard [1]. This can be achieved by using reconfigurable hardware and swapping the software for different technologies. In a digital communication system, digital information can be sent and received by subtly changing characteristics of a carrier sine wave. In this case, determining changes in amplitude (ASK) is quite simple. However, detecting International Journal of Digital Information and Wireless Communications (IJDIWC) 1(2): 384-393 The Society of Digital Information and Wireless Communications, 2011(ISSN 2225-658X)