mod_demod.m File Reference

Functions
AWGN	channel (1) or fading(0) % random bits mybits
	figure (cf)
	line ([-1.5, 1.5], [0 0], 'LineStyle', '-', 'Color', ln_clr, 'LineWidth', 1)
else	plot (syms(:), 0,' *', 'MarkerSize', 16, 'LineWidth', 2)
	axis (1.5 *[-1 1 -1 1])
	xlabel ('Inphase')
	ylabel ('Quadrature')
	title ('Constellation')
	legend (hlegs, 'Tx', 'Rx', 'Fontsize', 16)
	fprintf ("Symbol Error Rate = %12.4e\t Bit Error Rate = %12.4e\n", sym_err, bit_err)

Variables
Author(s)	clear
	MOD_ORDER = 16
Modulation order	N = 1000
	nbits = N * log2(MOD_ORDER)
number of bits	snr = 15
	n_ant = 1
number of antennas	awgn = 1
Plot Tx constellation	cf = 0
	clf
	ln_clr = [0.25, 0.25, 0.25]
grid	on
end axis	square
hold	off
	tx_clr = [0, 0.4470, 0.7410]
	rx_clr = [0.8500, 0.3250, 0.0980]
	hleg2 = plot(syms(:),'*','MarkerSize',16, 'LineWidth',2, 'Color', tx_clr)
else	hleg1 = plot(rx_syms(:), 0,'o','MarkerSize',3, 'Color', rx_clr)
end	hlegs = [hleg1 hleg2]
Do your	selves
	bit_err = mean(mybits ~= bits)

Function Documentation

axis()

axis

(

1.5 *

[-1 1 -1 1]

)

channel()

AWGN channel

(

1

)

figure()

figure

(

cf

)

fprintf()

fprintf

(

)

legend()

legend	(	hlegs	,
		'Tx'	,
		'Rx'	,
		'Fontsize'	,
		16
	)

line()

line	(	'LineStyle'	,
		'-'	,
		'Color'	,
		ln_clr	,
		'LineWidth'	,
		1
	)

plot()

else plot	(	syms(:)	,
		0	,
		' *'	,
		'MarkerSize'	,
		16	,
		'LineWidth'	,
		2
	)

title()

title

(

'Constellation'

)

xlabel()

xlabel

(

'Inphase'

)

ylabel()

ylabel

(

'Quadrature'

)

Variable Documentation

awgn

number of antennas awgn = 1

bit_err

bit_err = mean(mybits ~= bits)

cf

Plot Rx constellation cf = 0

clear

Author (s) clear

clf

clf

hleg1

else hleg1 = plot(rx_syms(:), 0,'o','MarkerSize',3, 'Color', rx_clr)

hleg2

hleg2 = plot(syms(:),'*','MarkerSize',16, 'LineWidth',2, 'Color', tx_clr)

hlegs

end hlegs = [hleg1 hleg2]

ln_clr

ln_clr = [0.25, 0.25, 0.25]

MOD_ORDER

if MOD_ORDER = 16

N

Modulation order N = 1000

n_ant

n_ant = 1

nbits

nbits = N * log2(MOD_ORDER)

off

hold off

on

hold on

rx_clr

rx_clr = [0.8500, 0.3250, 0.0980]

selves

Do your selves

snr

number of bits snr = 15

square

axis square

tx_clr

tx_clr = [0, 0.4470, 0.7410]