scholarly journals A Quadrature Amplitude Modulation Receiver Model with Matched Filters

2020 ◽  
Vol 11 (10) ◽  
Author(s):  
Serkan Yakut
Keyword(s):  
Amplitude Modulation ◽  
Communication Systems ◽  
Orthogonal Frequency Division Multiplexing ◽  
Additive White Gaussian Noise ◽  
Local Area ◽  
Quadrature Amplitude Modulation ◽  
Rectangular Pulse ◽  
Matched Filters ◽  
The Time Domain ◽  
4G Lte

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.

Performance Analysis of Multiple FEC Channel Coding Algorithms for Software Defined Radio Using Quadrature Amplitude Modulation

2016 ◽  
Vol 7 (2) ◽  
pp. 1-15 ◽  
Author(s):  
Nikhil Marriwala ◽  
O. P. Sahu ◽  
Anil Vohra
Keyword(s):  
Amplitude Modulation ◽  
Turbo Codes ◽  
Channel Coding ◽  
Software Defined Radio ◽  
Communication Systems ◽  
Forward Error Correction ◽  
Additive White Gaussian Noise ◽  
Original Data ◽  
Quadrature Amplitude Modulation ◽  
Experimental Result

This paper describes the development of a Software Defined Radio (SDR)-based Transceiver simulation model using Quadrature Amplitude Modulation (QAM) Scheme and analyze its performance using Forward Error Correction (FEC) channel coding algorithms namely the Convolution and the Turbo Codes. This model efficiently evaluates the performance of high data rate multi array M-QAM, schemes. The performance of these FEC codes is evaluated when the system is subjected to noise and interference in the channel. In this design Additive White Gaussian Noise (AWGN) channel has been considered. The design is analyzed using Bit Error Rate (BER) and Signal to Noise Ratio (SNR) for different M-QAM techniques. The simulation results give a possible solution for future SDR systems which may be used in various wireless communication systems. An experimental result shows that the QAM transceiver achieves the transmission of data at high level accurately. FEC Channel coding scheme is used wherever the re-transmission of the data is not feasible. On the receiver side, this channel coded signal is decoded in order to get back the original data even if the channel coded signal undergoes some interference from the noise in the transmission medium. The Performance is then analyzed in terms of BER for Convolution Coding and Turbo Coding algorithm at a particular value of SNR in LabVIEW graphical programming. Finally, comparison has been drawn based on different parameters between the existing SDR system and the proposed design in this paper to analyze and highlight the effectiveness of the proposed SDR design.

scholarly journals FILTER BANK MULTICARRIER (FBMC) UNTUK 5G

2021 ◽  
Vol 13 (2) ◽  
pp. 135-142
Author(s):  
Gradiyanto Jason ◽  
Theresia Ghozali ◽  
Kumala Indriati
Keyword(s):  
Amplitude Modulation ◽  
Orthogonal Frequency Division Multiplexing ◽  
Dynamic Spectrum Access ◽  
Filter Bank ◽  
Quadrature Amplitude Modulation ◽  
Cyclic Prefix ◽  
Intercarrier Interference ◽  
Frequency Division ◽  
Spectrum Access ◽  
Filter Bank Multicarrier

Saat ini, teknologi pada bidang telekomunikasi berkembang dengan pesat. Pengguna telekomunikasi membutuhkan teknologi komunikasi yang cepat dengan bandwidth yang lebih lebar. Oleh karena itu dikembangkanlah Filter Bank Multi Carrier/Offset Quadrature Amplitude Modulation yang merupakan teknologi kandidat modulasi yang akan digunakan pada 5G. Filter Bank Multi Carrier/Offset Quadrature Amplitude Modulation (FMBC/OQAM) merupakan perkembangan dari Orthogonal Frequency Division Multiplexing (OFDM) yang dimodifikasi dengan menggunakan filter untuk mengurangi noise. OFDM menggunakan teknik multiplexing yang membagi bandwith menjadi beberapa frekuensi sub-carrier. Tetapi OFDM memiliki kelemahan yaitu memerlukan Cyclic Prefix (CP) untuk mengatasi Intersymbol Interference (ISI) serta Intercarrier Interference (ICI). Dengan menggunakan Filter berdasarkan Lembaga Physical layer for dynamic spectrum access and cognitive radio (PHYDYAS)  ,lebar bandwith yang bertambah akibat Cyclic prefix  akan dapat dikurangi Hasil yang dicapai dalam penelitian ini adalah  FBMC berhasil diterapkan  dan data yang dikirim sama dengan data yang diterima.

Simulation Implementation and Analysis of the Performance of M-QAM by Using MATLAB

2014 ◽  
Vol 610 ◽  
pp. 933-938
Author(s):  
Li Ming Yang ◽  
Jia Guo ◽  
Hong Wei Ding ◽  
Yong Wang ◽  
Hong Mei Li ◽  
...  
Keyword(s):  
Amplitude Modulation ◽  
Communication Systems ◽  
Digital Communication ◽  
Multimedia Communication ◽  
Quadrature Amplitude Modulation ◽  
Vital Role ◽  
Transmission System ◽  
Digital Multimedia ◽  
Digital Communication Systems

For the implementation of digital multimedia communication, an efficient, reliable, deterministic transmission system plays a vital role. Quadrature amplitude modulation (QAM) is commonly used in digital communication systems. We focuses on simulation and analysis of M-level QAM by using MATLAB in this paper.

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