• Abhay Bhandari

Modulation is the process of varying one or more properties of a high frequency periodic waveform, called the carrier signal, with a modulating signal which typically contains information to be transmitted. The main goal of modulation today is to squeeze as much data into the least amount of spectrum possible. That objective, known as spectral efficiency, measures how quickly data can be transmitted in an assigned bandwidth expressed in terms of bits per second per Hz (b/s/Hz). Multiple techniques have emerged to achieve and improve spectral efficiency. There are various analog and digital modulation techniques used to transmit the signals. Due to various advantages of digital signals over analog signals, digital modulation techniques are preferred widely. This paper presents a brief study of different digital modulation methods and their uses for a particular application.

baseband, bandwidth, Discrete, guided, manipulated, noise

"SIMULATION OF SIGNAL CONSTELLATIONS OF BPSK, QPSK AND QAM AND THEIR ANALYSIS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 1, page no.1109-1112, January 2019, Available :http://www.jetir.org/papers/JETIRDY06184.pdf

"SIMULATION OF SIGNAL CONSTELLATIONS OF BPSK, QPSK AND QAM AND THEIR ANALYSIS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 1, page no. pp1109-1112, January 2019, Available at : http://www.jetir.org/papers/JETIRDY06184.pdf