This m-file simulates MPSK (BPSK,QPSK,8PSK)with theoretical and simulated results using Gray coding. Numerical examples of a satellite link design are shown using QPSK and/or 8PSK when the bit rate(Rb)is greater than the channel bandwidth Wc (Band-limited channel).

i have the same problem with holly :
??? Error: File: graymapPSK.m Line: 8 Column: 17
The expression to the left of the equals sign is not a valid target for an assignment.
Error in ==> MPSK at 49
symbols = graymapPSK(bits); % gray code map to symbols

can anyone help me to find Matlab codes for simulating:

BER using convolutional coding with QPSK and 16QAM modulations in an AWGN and Rayleigh channels as a function of the average SNR (i.e. average ES/N0). The (punctured) convolutional code is the one standardized in IEEE 802.16 with a polynomial generators of {133o, 171o}, constraint length L=7 and a native code rate r=1/2.

i have the same problem with holly :
??? Error: File: graymapPSK.m Line: 8 Column: 17
The expression to the left of the equals sign is not a valid target for an assignment.

Error in ==> MPSK at 49
symbols = graymapPSK(bits); % gray code map to symbols

somebody help please ASAP......... or email me: fananideta@yahoo.com

Can anyone help me?
I face the problem to complite the matlab code with the following error:
----------------------------------------------------------------------
??? Undefined command/function 'graymapPSK'.

Error in ==> MPSK at 49
symbols = graymapPSK(bits); % gray code map to symbols
-----------------------------------------------------------------------

iam in the faculty of engineering and iam indeed need this file

12 Sep 2007

bhachandra badhiye

09 Sep 2007

Frank Stepanek

15 Jun 2007

rausan aja

its a good article

27 May 2007

st zim

good

05 May 2007

wang songhai

25 Apr 2007

Muhammad Alvi

i need ur approval to get the code used in matlab

16 Apr 2007

Vladimir Rasovic

A STA DA KAZEM

14 Apr 2007

BETT HILLARY KIPKOECH

14 Apr 2007

Nuri Misbah

May I get free copies of comparison of PSK modulations technics simulated by MATLAB.

26 Mar 2007

hamed nozari

12 Mar 2007

Damodar Kandel

Good done

20 Feb 2007

J C

2/20/07 After reviewing the comparsion result between the Matlab 8PSK Gray coding demo (using Communications Blockset) and the MPSK graphs in this m file, I have concluded this m file gives corresponding results. Usually,SER is compared with Eb/No but this m file graph shows Es/No. The m file graph for SER vs Es/NO 8PSK can be shifted to the left by approximatley 4.77dB because Eb=ES-10LOG(k) where k is LOG2(8)=3. QPSK SER can be shifted to the left by ~3dB where k is LOG2(4).

20 Feb 2007

J C

2/20/07 A correction needs to be added in the function call function symbols=graymapPSK(bits). In case 2, between lines 184 and 184, add %symbols = [1-bits(1,:)-bits(2,:);bits(2,:)-bits(1,:)]

13 Feb 2007

inderjeet kaur

pls help me hw to include this grayPSK

24 Jan 2007

maqsood ahmad

this is v good

09 Jan 2007

ahmed ali

send me the error calculation

22 Dec 2006

Jean Pierre MALLET

10 Dec 2006

jose da Silva Filho

very nice site

30 Sep 2006

Ming Li

Sorry

30 Sep 2006

Ming Li

it is bad.
=========================================
??? Undefined command/function 'graymapPSK'.

Error in ==> MPSK at 49
symbols = graymapPSK(bits); % gray code map to symbols

15 Sep 2006

ramiro csatro

07 Sep 2006

bala sundaram

its nice

29 Jun 2006

J C

These commented lines should be corrected as follows:
157 %where Q(x)=.5*erfc(sqrt(x)/sqrt(2)) to
%where Q(x)=.5*erfc((x)/sqrt(2))
158 %PE(M=4)=.5*erfc(1.5786/sqrt(2))=6.5e-3 to %PE(M=4)=.5*erfc(2.484/sqrt(2))=6.5e-3