mimo wireless system
DESCRIPTION
All About MIMO.TRANSCRIPT
MIMO WIRELESS SYSTEM
Created By:-
AndroidWallet.blogspot.in
WIRELESS SYSTEM
AndroidWallet.blogspot.in
Summary of Wireless System- • Existed for less than 200 years. • Wireless telephony began to appear in 1907.
AndroidWallet.blogspot.in
Mimo background- • Mimo OVERVIEW • Mimo Channel Capacity
AndroidWallet.blogspot.in
MIMO OVERVIEW- MIMO Stands for multi input multi output. Uses multiple antennas at transmitter & reciever
port. MIMO exploits the space dimension to improve
wireless systems capacity, range and reliability. An antenna technology that is used both in
transmission andreceiver equipment for wireless radio communication
AndroidWallet.blogspot.in
WIRELESS CHANNEL
X1(k) Y1(k) X2(k) Y2(k) . . . . . . . . . . . . Xn(k) Yn(k) AndroidWallet.blogspot.in
Four basic models-
• SISO • SIMO
AndroidWallet.blogspot.in
• MISO • MIMO
AndroidWallet.blogspot.in
AndroidWallet.blogspot.in
CHANNEL CAPACITY- • SISO- C= log2(1+y) bps/hz (shannon formula) • SIMO- C= log2(1+my)
• MISO- C=log2(1+ny) • MIMO- C=log2(1+mny)
AndroidWallet.blogspot.in
How MIMO works- • MIMO takes advantage of multi-path. • MIMO uses multiple antennas to send multiple parallel signals (from • transmitter). • In an urban environment, these signals will bounce off trees, • buildings, etc. and continue on their way to their destination (the • receiver) but in different directions. • “Multi-path” occurs when the different signals arrive at the receiver • at various times. • With MIMO, the receiving end uses an algorithm or special signal • processing to sort out the multiple signals to produce one signal that • has the originally transmitted data.
AndroidWallet.blogspot.in
AndroidWallet.blogspot.in
AndroidWallet.blogspot.in
AndroidWallet.blogspot.in
AndroidWallet.blogspot.in
PROBLEMS IN MIMO-
• Fading; a- Small scale b- Large scale
AndroidWallet.blogspot.in
AndroidWallet.blogspot.in
AndroidWallet.blogspot.in
