Howtosignalprocessing
- Why channel state information is important?
- What is channel estimation in wireless communication?
- How is channel state information calculated?
- What is CSI in MIMO?
Why channel state information is important?
The CSI makes it possible to adapt transmissions to current channel conditions, which is crucial for achieving reliable communication with high data rates in multiantenna systems.
What is channel estimation in wireless communication?
The channel estimation algorithm extracts the reference signals for a transmit/receive antenna pair from the received grid. The least squares estimates of the channel frequency response at the pilot symbols are calculated as described in On Channel Estimation in OFDM Systems [2].
How is channel state information calculated?
Channel state information (CSI) is basically calculated using the pilot signals used during transmission and compared with the received pilot signals, while the SNR reflects the strength of the transmitted signal in respect of the channel noise.
What is CSI in MIMO?
In a MIMO system, a transmitter with perfect knowledge of the underlying channel state information (CSI) can achieve a higher channel capacity compared to transmission without CSI.
