Open AccessA Quadrature Amplitude Modulation Receiver Model with Matched Filters
Author(s) -
Serkan Yakut
Publication year - 2020
Publication title -
international journal of contemporary research and review
Language(s) - English
Resource type - Journals
ISSN - 0976-4852
DOI - 10.15520/ijcrr.v11i10.850
Subject(s) - orthogonal frequency division multiplexing , quadrature amplitude modulation , additive white gaussian noise , electronic engineering , qam , cyclic prefix , transmitter , computer science , pulse amplitude modulation , channel (broadcasting) , telecommunications , detector , engineering , bit error rate , pulse (music)
In this study, it is mathematically shown that the detector inputs obtained using the matched filters in the Quadrature Amplitude Modulation (QAM) receiver are the same expressions as those obtained using the integrators if a rectangular pulse is used in the transmitter and the channel is Additive White Gaussian Noise (AWGN). Under the assumption that there is a perfect synchronization between the transmitter and the receiver. QAM is intensively used at the present time for the data transmission on subchannels in orthogonal frequency-division multiplexing (OFDM) communication systems such as digital subscriber lines (DSLs) modems, wireless local area networks (WLANs) and cellular wireless communication systems (e.g. 4G LTE). Cyclic-prefix OFDM is deployed in 4G LTE systems and the rectangular pulse is used in the time domain to shape all subcarriers of OFDM.