readme-chap3.txt

软件无线电的基本思想是以一个通用、标准、模块化的硬件平台为依托

This program simulates the transmission performance of MSK under Rayleigh fading environment.

(a) Set paremeters

First of all, we set simulation parameters in "msk_fading.m".
%******************** Preparation part **********************

sr=256000.0; % Symbol rate 256 ksymbol/s
ml=1;        % Number of modulation levels
br=sr.*ml;   % Bit rate (=symbol rate in this case)
nd = 100;   % Number of symbols that simulates in each loop
ebn0=10;     % Eb/N0
IPOINT=8;    % Number of oversamples

%******************* Fading initialization ********************
% If you use fading function "sefade", you can initialize all of parameters.
% Otherwise you can comment out the following initialization.
% The detailed explanation of all of valiables are mentioned in Program 2-8.

% Time resolution

tstp=1/sr/IPOINT; 

% Arrival time for each multipath normalized by tstp
% If you would like to simulate under one path fading model, you have only to set 
% direct wave.

itau = [0];

% Mean power for each multipath normalized by direct wave.
% If you would like to simulate under one path fading model, you have only to set 
% direct wave.
dlvl = [0];

% Number of waves to generate fading for each multipath.
% In normal case, more than six waves are needed to generate Rayleigh fading
n0=[6];

% Initial Phase of delayed wave
% In this simulation four-path Rayleigh fading are considered.
th1=[0.0];

% Number of fading counter to skip 
itnd0=nd*IPOINT*100;

% Initial value of fading counter
% In this simulation one-path Rayleigh fading are considered.
% Therefore one fading counter are needed.
  
itnd1=[1000];

% Number of directwave + Number of delayed wave
% In this simulation one-path Rayleigh fading are considered
now1=1;        

% Maximum Doppler frequency [Hz]
% You can insert your favorite value
fd=320;       

% You can decide two mode to simulate fading by changing the variable flat
% flat     : flat fading or not 
% (1->flat (only amplitude is fluctuated),0->nomal(phase and amplitude are fluctutated)
flat =1;

%******************** START CALCULATION *********************
nloop=1000;  % Number of simulation loops

(b) Type just the following command

>> clear
>> msk_fading

(c) Then, you can see the following simulation result on your command window.
(example)
10	2058	100000	2.058000e-002

The meaning of each value is the same of the result from "bpsk.m".
The simulation result is stored in the file (BERmskfad.dat).

#########################################################
(9) Simulation of "msk2.m"
#########################################################

This program simulates the transmission performance of MSK2 under Additive White Gausian Noise (AWGN) environment.

(a) Set paremeters

First of all, we set simulation parameters in "msk2.m".
%******************** Preparation part **********************

sr=256000.0; % Symbol rate 256 ksymbol/s
ml=1;        % Number of modulation levels
br=sr.*ml;   % Bit rate (=symbol rate in this case)
nd = 1000;   % Number of symbols that simulates in each loop
ebn0=5;      % Eb/N0
IPOINT=8;    % Number of oversamples

%******************** START CALCULATION *********************
nloop=100;  % Number of simulation loops

(b) Type just the following command

>> clear
>> msk2

(c) Then, you can see the following simulation result on your command window.
(example)
5	1179	100000	1.179000e-002

The meaning of each value is the same of the result from "bpsk.m".
The simulation result is stored in the file (BERmsk2.dat).

#########################################################
(10) Simulation of "msk2_fading.m"
#########################################################

This program simulates the transmission performance of MSK2 under Rayleigh fading environment.

(a) Set paremeters

First of all, we set simulation parameters in "msk2_fading.m".
%******************** Preparation part **********************

sr=256000.0; % Symbol rate 256 ksymbol/s
ml=1;        % Number of modulation levels
br=sr.*ml;   % Bit rate (=symbol rate in this case)
nd = 100;   % Number of symbols that simulates in each loop
ebn0=15;     % Eb/N0
IPOINT=8;    % Number of oversamples

%******************* Fading initialization ********************
% If you use fading function "sefade", you can initialize all of parameters.
% Otherwise you can comment out the following initialization.
% The detailed explanation of all of valiables are mentioned in Program 2-8.

% Time resolution

tstp=1/sr/IPOINT; 

% Arrival time for each multipath normalized by tstp
% If you would like to simulate under one path fading model, you have only to set 
% direct wave.

itau = [0];

% Mean power for each multipath normalized by direct wave.
% If you would like to simulate under one path fading model, you have only to set 
% direct wave.
dlvl = [0];

% Number of waves to generate fading for each multipath.
% In normal case, more than six waves are needed to generate Rayleigh fading
n0=[6];

% Initial Phase of delayed wave
% In this simulation four-path Rayleigh fading are considered.
th1=[0.0];

% Number of fading counter to skip 
itnd0=nd*IPOINT*100;

% Initial value of fading counter
% In this simulation one-path Rayleigh fading are considered.
% Therefore one fading counter are needed.
  
itnd1=[1000];

% Number of directwave + Number of delayed wave
% In this simulation one-path Rayleigh fading are considered
now1=1;        

% Maximum Doppler frequency [Hz]
% You can insert your favorite value
fd=320;       

% You can decide two mode to simulate fading by changing the variable flat
% flat     : flat fading or not 
% (1->flat (only amplitude is fluctuated),0->nomal(phase and amplitude are fluctutated)
flat =1;

%******************** START CALCULATION *********************
nloop=1000;  % Number of simulation loops

(b) Type just the following command

>> clear
>> msk2_fading

(c) Then, you can see the following simulation result on your command window.
(example)
15	1243	100000	1.243000e-002

The meaning of each value is the same of the result from "bpsk.m".
The simulation result is stored in the file (BERmsk2fad.dat).

#########################################################
(11) Simulation of "gmsk.m"
#########################################################

This program simulates the transmission performance of GMSK under Additive White Gausian Noise (AWGN) environment.

(a) Set paremeters

First of all, we set simulation parameters in "gmsk.m".
%******************** Preparation part **********************

sr=256000.0; % Symbol rate 256 ksymbol/s
ml=1;        % Number of modulation levels
br=sr.*ml;   % Bit rate (=symbol rate in this case)
nd = 1000;   % Number of symbols that simulates in each loop
ebn0=5;      % Eb/N0
IPOINT=8;    % Number of oversamples

%******************** START CALCULATION *********************
nloop=100;  % Number of simulation loops

(b) Type just the following command

>> clear
>> gmsk

(c) Then, you can see the following simulation result on your command window.
(example)
5	2634	100000	2.634000e-002

The meaning of each value is the same of the result from "bpsk.m".
The simulation result is stored in the file (BERgmsk.dat).

#########################################################
(12) Simulation of "gmsk_fading.m"
#########################################################

This program simulates the transmission performance of GMSK under Rayleigh fading environment.

(a) Set paremeters

First of all, we set simulation parameters in "gmsk_fading.m".
%******************** Preparation part **********************

sr=256000.0; % Symbol rate 256 ksymbol/s
ml=1;        % Number of modulation levels
br=sr.*ml;   % Bit rate (=symbol rate in this case)
nd = 100;   % Number of symbols that simulates in each loop
ebn0=15;     % Eb/N0
IPOINT=8;    % Number of oversamples

%******************* Fading initialization ********************
% If you use fading function "sefade", you can initialize all of parameters.
% Otherwise you can comment out the following initialization.
% The detailed explanation of all of valiables are mentioned in Program 2-8.

% Time resolution

tstp=1/sr/IPOINT; 

% Arrival time for each multipath normalized by tstp
% If you would like to simulate under one path fading model, you have only to set 
% direct wave.

itau = [0];

% Mean power for each multipath normalized by direct wave.
% If you would like to simulate under one path fading model, you have only to set 
% direct wave.
dlvl = [0];

% Number of waves to generate fading for each multipath.
% In normal case, more than six waves are needed to generate Rayleigh fading
n0=[6];

% Initial Phase of delayed wave
% In this simulation four-path Rayleigh fading are considered.
th1=[0.0];

% Number of fading counter to skip 
itnd0=nd*IPOINT*100;

% Initial value of fading counter
% In this simulation one-path Rayleigh fading are considered.
% Therefore one fading counter are needed.
  
itnd1=[1000];

% Number of directwave + Number of delayed wave
% In this simulation one-path Rayleigh fading are considered
now1=1;        

% Maximum Doppler frequency [Hz]
% You can insert your favorite value
fd=320;       

% You can decide two mode to simulate fading by changing the variable flat
% flat     : flat fading or not 
% (1->flat (only amplitude is fluctuated),0->nomal(phase and amplitude are fluctutated)
flat =1;

%******************** START CALCULATION *********************
nloop=1000;  % Number of simulation loops

(b) Type just the following command

>> clear
>> gmsk_fading

(c) Then, you can see the following simulation result on your command window.
(example)
15	1546	100000	1.546000e-002

The meaning of each value is the same of the result from "bpsk.m".
The simulation result is stored in the file (BERgmskfad.dat).

#########################################################
(13) Simulation of "qam16.m"
#########################################################

This program simulates the transmission performance of 16QAM under Additive White Gausian Noise (AWGN) environment.

(a) Set paremeters

First of all, we set simulation parameters in "qam16.m".
%******************** Preparation part **********************

sr=256000.0; % Symbol rate 256 ksymbol/s
ml=4;        % Number of modulation levels
br=sr.*ml;   % Bit rate (=symbol rate in this case)
nd = 1000;   % Number of symbols that simulates in each loop
ebn0=6;      % Eb/N0
IPOINT=8;    % Number of oversamples

%******************** START CALCULATION *********************
nloop=100;  % Number of simulation loops

(b) Type just the following command

>> clear
>> qam

(c) Then, you can see the following simulation result on your command window.
(example)
6	11121	400000	2.780250e-002

The meaning of each value is the same of the result from "bpsk.m".
The simulation result is stored in the file (BERqam.dat).

#########################################################
(14) Simulation of "qam16_fading.m"
#########################################################

This program simulates the transmission performance of 16QAM under Rayleigh fading environment.

(a) Set paremeters

First of all, we set simulation parameters in "qam16_fading.m".
%******************** Preparation part **********************

sr=256000.0; % Symbol rate 256 ksymbol/s
ml=4;        % Number of modulation levels
br=sr.*ml;   % Bit rate (=symbol rate in this case)
nd = 100;   % Number of symbols that simulates in each loop
ebn0=15;     % Eb/N0
IPOINT=8;    % Number of oversamples

%******************* Fading initialization ********************
% If you use fading function "sefade", you can initialize all of parameters.
% Otherwise you can comment out the following initialization.
% The detailed explanation of all of valiables are mentioned in Program 2-8.

% Time resolution

tstp=1/sr/IPOINT; 

% Arrival time for each multipath normalized by tstp
% If you would like to simulate under one path fading model, you have only to set 
% direct wave.

itau = [0];

% Mean power for each multipath normalized by direct wave.
% If you would like to simulate under one path fading model, you have only to set 
% direct wave.
dlvl = [0];

% Number of waves to generate fading for each multipath.
% In normal case, more than six waves are needed to generate Rayleigh fading
n0=[6];

% Initial Phase of delayed wave
% In this simulation four-path Rayleigh fading are considered.
th1=[0.0];

% Number of fading counter to skip 
itnd0=nd*IPOINT*100;

% Initial value of fading counter
% In this simulation one-path Rayleigh fading are considered.
% Therefore one fading counter are needed.
  
itnd1=[1000];

% Number of directwave + Number of delayed wave
% In this simulation one-path Rayleigh fading are considered
now1=1;        

% Maximum Doppler frequency [Hz]
% You can insert your favorite value
fd=160;       

% You can decide two mode to simulate fading by changing the variable flat
% flat     : flat fading or not 
% (1->flat (only amplitude is fluctuated),0->nomal(phase and amplitude are fluctutated)
flat =1;

%******************** START CALCULATION *********************
nloop=1000;  % Number of simulation loops

(b) Type just the following command

>> clear
>> qam16_fading

(c) Then, you can see the following simulation result on your command window.
(example)
15	5105	400000	1.276250e-002

The meaning of each value is the same of the result from "bpsk.m".
The simulation result is stored in the file (BERqamfad.dat).


By changing the value of Eb/N0 (variable ebn0), you can obtain the graph that shows the relationship between Eb/N0 and BER and that can been seen in the figures of the book.


********** end of file **********