Antenna technology using multiple transmit and receive antennas to increase throughput.
Description
Multiple Input Multiple Output (MIMO) is an antenna technology that uses multiple antennas at both transmitter and receiver to improve communication performance. LTE supports various MIMO configurations (2x2, 4x4, 8x8).
MIMO can be used for spatial multiplexing (increased data rate), transmit diversity (improved reliability), or beamforming (increased coverage).
Purpose & Motivation
MIMO was essential for LTE to achieve its target throughput:
- Double/quadruple peak rates with spatial multiplexing - Improve cell-edge performance with diversity - Increase capacity without additional spectrum - Enable advanced features like CoMP
Key Features
- ✓Spatial multiplexing
- ✓Transmit diversity
- ✓Beamforming
- ✓Precoding matrices
- ✓Codebook-based feedback