blob: 48dd93d8eed2ae94cba325b87d92fd4e26741cc9 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
|
// Exa 21.7
// To determine the PER(Packet error rate) for FH(Frequency Hopping packet) and DS(Direct spread packet).
clc;
clear all;
D=1000*8; //packet size in bits
R=2*10^6; //transmission rate in bps
L=3; //msec(Dwell time)
H=0.625; //msec(Duration of BT packet)
//solution
Tw=10^3*D/R; //the packet duration of IEEE 802.11 in msec
H_L=1;
G=(H_L)*L-Tw-H;
Gm=abs(G);
PER_FH=1-((1-Gm/L)*(78/79)^(H_L)+Gm/L*(78/79)^((H_L)-G/Gm));
PER_DS=1-((1-Gm/L)*(57/79)^(H_L)+Gm/L*(57/79)^((H_L)-G/Gm));
printf('The PER for FH packet and PER for DS packet are %d percent & %.2f percent respectively',round(PER_FH*100),PER_DS*100);
disp("The collision probability with 802.11 DS is much higher than with 802.11 FH.")
|
