Comments on: Symbol Error Rate for 16PSK

By: Krishna Sankar

Krishna Sankar — Wed, 31 Mar 2010 00:32:58 +0000

@lyla: You can generate random 16QAM constellation points, pass them through a pulse shaping filter and then feed to the VSA

By: lyla

lyla — Mon, 22 Feb 2010 04:38:06 +0000

Hello, I have a problem that I need to solve about a
modulation algorithm. I’m working on a assignment and need a code in Matlab to the
in-phase and quadrature components of a 16 QAM. Afterwards, I will run the
program in a Vector Signal Analyzer and I will have to see the I and Q waveforms
and the constellation.

I have been trying out by creating an array with 16 values (0 to 15) and
converting them to binary (0000 to 1111), afterwards, I have created the I and Q
signals, as a sine or cosine of the array values mentioned respectively using a
for loop, thus creating the different values for the phase, but I don’t know how
to express the amplitude levels (-3, -1, 1, 3).

I would appreciate if someone could lend me a hand in this problem.

Thanks in advance

By: Krishna Sankar

Krishna Sankar — Fri, 21 Aug 2009 23:56:40 +0000

@Moongeun: To round the received phase to the nearest constellation point.

By: Moongeun

Moongeun — Wed, 19 Aug 2009 08:12:24 +0000

hi~~Krishna

i have a question~~~

in the matbla source code~

ipPhasehat=2*pi/M*round(opPhase/(2*pi/M))

i don`t know why you use this code~~~

anyway thank you for your efforts~

By: Krishna Pillai

Krishna Pillai — Sun, 19 Apr 2009 01:54:34 +0000

@Tukuben: The following posts maybe helpful to you
http://www.dsplog.com/2008/03/18/symbol-error-rate-for-16psk/
http://www.dsplog.com/2008/05/18/bit-error-rate-for-16psk-modulation-using-gray-mapping/

By: Tukuben

Tukuben — Sun, 19 Apr 2009 01:31:34 +0000

Hi Krishna,
i`m an MSc communication systems engineering student in the university of portsmouth, i would love to be a member of this forum and there is this problem i want to solve:
Analysis & Simulation of 16PSK Using
MATLAB.

OBJECTIVES:
· Demonstrate the ability to learn MATLAB for the purpose of this
coursework
· Write a technical report describing the principle, theory and applications
of 16PSK. Your system will be tested over the AWGN Channel.
· Implement a MATLAB simulation of 16PSK modulator and
demodulator system.
· Measurement of the symbol error rate and bit error rate as a function of
the ratios Eb / No and Es / No achieved by the system in the presence of
additive white Gaussian Noise. Your measurements should be compared
to the theoretical estimates that you should have derived from first
principles.
· Show that you are able to identify and use technical references.

But for now am learning MATLAB and the problem is giving me though time, i wish you can help me by putting me through with the rest apart from the MATLAB. Please sir i need your help.
Regards.
Tukuben

By: Krishna Pillai

Krishna Pillai — Fri, 30 Jan 2009 00:44:40 +0000

@abdulmaleek: There are two options:

1. You can subscribe to the email newsletter by providing you email address in the form on the top right of the page. Email subscription will entitle you to receive the free e-book on error rates in AWGN.

2. Further, you can join via Google FriendConnect option provided in the bottom of the page. Google FriendConnect enables you to share the contents of this blog to your friends/colleagues in an easier fasion.

Hope this helps.