MIMO Antenna Selection via Preprocessing Matrix for ICI Reduction

The patent segments the transmission process by assigning different data streams to different time slots or frequency resources, allowing multiple data streams to be transmitted simultaneously through multiple antennas without causing inter-channel interference. This segmentation separates the interfering signals in the time or frequency domain.

The patent introduces an additional dimension (time or frequency) to separate the data streams transmitted through multiple antennas. Instead of only spatial separation, the signals are separated in the time-frequency domain, adding another dimension to the transmission space.

The patent adds time or frequency dimensions to the spatial domain, creating a time-frequency-spatial multi-dimensional transmission space. This allows the system to achieve spatial multiplexing gain with more transmission antennas than reception antennas by separating signals in the time-frequency domain.

The patent introduces time-frequency resource allocation as an intermediary mechanism that mediates between the multiple transmission antennas and limited reception antennas, enabling the system to handle more transmission antennas by sequentially or selectively allocating time-frequency resources.

The patent segments the detection process by separating signals in time or frequency before detection. Instead of detecting multiple simultaneous signals at once, the system detects segmented signals sequentially or independently, reducing detection complexity while maintaining high data rates.

The patent transforms the detection problem from a high-dimensional simultaneous detection task to a lower-dimensional sequential detection task by exploiting time-frequency separation. This dimensionality reduction simplifies the detection algorithm while preserving the ability to handle multiple data streams.