Advantage of Multi Antenna Technique
Tutorial ─ MIMO Communications with Applications to (B)3G and 4G Systems
Introduction
Juha Ylitalo
Tutorial #2: MIMO Communications with Applications to (B)3G and 4G Systems ─ Introduction
© J. Ylitalo & M. Juntti, University of Oulu, Dept. Electrical and Inform. Eng., Centre for Wireless Communications (CWC) 1
Introduction
• Short historical note • Advantages of multi-antenna techniques • Adaptive antennas
– - Beamforming: spatial focusing of correlated signals – - Rx/Tx diversity: combining of decorrelated signals – - MIMO: increasing spectral efficiency/ data rates
• Simple example: SINR improvement • Definition of MIMO • Spatial correlation matrix • Example: Diversity & MIMO in WCDMA
Tutorial #2: MIMO Communications with Applications to (B)3G and 4G Systems ─ Introduction
© J. Ylitalo & M. Juntti, University of Oulu, Dept. Electrical and Inform. Eng., Centre for Wireless Communications (CWC) 2
Historical Note
• Multiple antenna transmission used by Marconi in 1901
– Four 61m high tower antennas (circular array) – Morse signal for "S" from England to Signal Hill, St. John, Newfoundland, distance 3425km
• • • •
Submarine sonar during 1910's Acoustic sensor arrays 1910's RF radars 1940's Ultrasonic scanners from 1960's
Tutorial #2: MIMO Communications with Applications to (B)3G and 4G Systems ─ Introduction
© J. Ylitalo & M. Juntti, University of Oulu, Dept. Electrical and Inform. Eng., Centre for Wireless Communications (CWC) 3
Advantages of Multiple Antenna Techniques
• • • • • • • Resistivity to fading (quality) Increased coverage Demonstration by Lucent Increased capacity with 8 Tx /12 Rx antennas: Increased data rate 1.2 Mbit/s in 30kHz Improved spectral efficiency Reduced power consumption Reduced cost of wireless network
Some challenges: - RF: Linear power amplifiers, calibration - Complex algorithms: DSP requirements, cost - Network planning & optimisation
Tutorial #2: MIMO Communications with Applications
Introduction
Juha Ylitalo
Tutorial #2: MIMO Communications with Applications to (B)3G and 4G Systems ─ Introduction
© J. Ylitalo & M. Juntti, University of Oulu, Dept. Electrical and Inform. Eng., Centre for Wireless Communications (CWC) 1
Introduction
• Short historical note • Advantages of multi-antenna techniques • Adaptive antennas
– - Beamforming: spatial focusing of correlated signals – - Rx/Tx diversity: combining of decorrelated signals – - MIMO: increasing spectral efficiency/ data rates
• Simple example: SINR improvement • Definition of MIMO • Spatial correlation matrix • Example: Diversity & MIMO in WCDMA
Tutorial #2: MIMO Communications with Applications to (B)3G and 4G Systems ─ Introduction
© J. Ylitalo & M. Juntti, University of Oulu, Dept. Electrical and Inform. Eng., Centre for Wireless Communications (CWC) 2
Historical Note
• Multiple antenna transmission used by Marconi in 1901
– Four 61m high tower antennas (circular array) – Morse signal for "S" from England to Signal Hill, St. John, Newfoundland, distance 3425km
• • • •
Submarine sonar during 1910's Acoustic sensor arrays 1910's RF radars 1940's Ultrasonic scanners from 1960's
Tutorial #2: MIMO Communications with Applications to (B)3G and 4G Systems ─ Introduction
© J. Ylitalo & M. Juntti, University of Oulu, Dept. Electrical and Inform. Eng., Centre for Wireless Communications (CWC) 3
Advantages of Multiple Antenna Techniques
• • • • • • • Resistivity to fading (quality) Increased coverage Demonstration by Lucent Increased capacity with 8 Tx /12 Rx antennas: Increased data rate 1.2 Mbit/s in 30kHz Improved spectral efficiency Reduced power consumption Reduced cost of wireless network
Some challenges: - RF: Linear power amplifiers, calibration - Complex algorithms: DSP requirements, cost - Network planning & optimisation
Tutorial #2: MIMO Communications with Applications