This lesson covers the diversity mechanism, discussing general diversity and its impact on error probability. The lesson also explores the concept of diversity gain and coding gain, explaining how they affect the slope of the error probability curve. It further discusses the Alamouti scheme, a well-established mechanism in signal processing. The lesson concludes with an exploration of the Dominant Eigen Mode and the role of feedback in modern communication systems.
00:18 - Introduction and recap of previous lesson
05:41 - Concept of transmit diversity
08:05 - Alamouti scheme
18:45 - Probability of error at high SNR
21:18 - What if feedback is available?
27:03 - CSIT: dominant eigen mode
- The diversity mechanism can significantly reduce the probability of error in a communication system.
- Diversity gain and coding gain play crucial roles in the performance of a communication system.
- The Alamouti scheme is a powerful mechanism that allows for the transfer of processing complexity to the transmitter side.
- Feedback is a fundamental mechanism in modern communication systems, providing higher spectral efficiency.
- The Dominant Eigen Mode allows for the extraction of maximum gain from a MIMO channel when there is CSI information available at the transmitter.