M-QAM Archives - GaussianWaves https://www.gaussianwaves.com/category/digital-modulations/m-qam/ Signal Processing for Communication Systems Tue, 22 Feb 2022 10:48:10 +0000 en-US hourly 1 https://wordpress.org/?v=6.6.2 https://i0.wp.com/www.gaussianwaves.com/gaussianwaves/wp-content/uploads/2016/02/cropped-gaussianwaves_logo_120_120.png?fit=32%2C32&ssl=1 M-QAM Archives - GaussianWaves https://www.gaussianwaves.com/category/digital-modulations/m-qam/ 32 32 163393712 π/2 BPSK (pi/2 BPSK): 5G NR PHY modulation https://www.gaussianwaves.com/2022/02/%cf%80-2-bpsk-pi-2-bpsk-5g-nr-phy-modulation/ https://www.gaussianwaves.com/2022/02/%cf%80-2-bpsk-pi-2-bpsk-5g-nr-phy-modulation/#comments Mon, 07 Feb 2022 03:36:47 +0000 https://www.gaussianwaves.com/?p=32776 The 5G New Radio (NR) supports quadrature phase shift keying (QPSK), 16- quadrature amplitude modulation (16-QAM), 64 QAM and 256 QAM modulation schemes for both uplink and downlink [1][2]. This is same as in LTE. Additionally, 5G NR supports π/2-BPSK in uplink (to be combined with OFDM with CP or DFT-s OFDM with CP)[1][2]. Utilization ... Read more

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]]> https://www.gaussianwaves.com/2022/02/%cf%80-2-bpsk-pi-2-bpsk-5g-nr-phy-modulation/feed/ 4 32776 Rician flat-fading channel – simulation https://www.gaussianwaves.com/2020/08/rician-flat-fading-channel-simulation/ https://www.gaussianwaves.com/2020/08/rician-flat-fading-channel-simulation/#comments Sat, 15 Aug 2020 13:54:24 +0000 https://www.gaussianwaves.com/?p=25926 In wireless environments, transmitted signal may be subjected to multiple scatterings before arriving at the receiver. This gives rise to random fluctuations in the received signal and this phenomenon is called fading. The scattered version of the signal is designated as non line of sight (NLOS) component. If the number of NLOS components are sufficiently ... Read more

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]]> https://www.gaussianwaves.com/2020/08/rician-flat-fading-channel-simulation/feed/ 2 25926 QAM Modulation using Karnaugh-map walks https://www.gaussianwaves.com/2014/11/constructing-a-rectangular-constellation-for-m-qam-modulation-using-karnaugh-map-walks/ https://www.gaussianwaves.com/2014/11/constructing-a-rectangular-constellation-for-m-qam-modulation-using-karnaugh-map-walks/#comments Tue, 25 Nov 2014 07:58:05 +0000 http://www.gaussianwaves.com/?p=7932 This article focused on constructing constellation for rectangular QAM modulation using Karnaugh-map walks. Exploit inherent property of Karnaugh-maps to construct Gray coded QAM constellation points. M-ary Quadrature Amplitude Modulation (M-QAM) In MQAM modulations, the information bits are encoded as variations in the amplitude and the phase of the signal. The M-QAM modulator transmits a series ... Read more

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]]> https://www.gaussianwaves.com/2014/11/constructing-a-rectangular-constellation-for-m-qam-modulation-using-karnaugh-map-walks/feed/ 3 7932 QAM modulation: simulate in Matlab & Python https://www.gaussianwaves.com/2012/10/qam-modulation-simulation-matlab-python/ https://www.gaussianwaves.com/2012/10/qam-modulation-simulation-matlab-python/#comments Wed, 10 Oct 2012 14:37:19 +0000 http://www.gaussianwaves.com/?p=2428 A generic complex baseband simulation technique, to simulate all M-ary QAM modulation techniques is given here. The given simulation code is very generic, and it plots both simulated and theoretical symbol error rates for all M-QAM modulation techniques. Rectangular QAM from PAM constellation There exist other constellation shapes (like circular, triangular constellations) that are more ... Read more

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