MIMO Refers to Multiple-Input Multiple-Output

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Resource Overview

MIMO (Multiple-Input Multiple-Output) technology can be broadly classified into two categories: transmit/receive diversity and spatial multiplexing. Traditional multi-antenna systems are used to enhance diversity gain for mitigating channel fading, where signals carrying identical information are transmitted via different paths. The receiver obtains multiple independently faded copies of data symbols, thereby achieving higher reception reliability. This technique is typically implemented using multi-antenna configurations, which have been extensively studied in mobile communications. From a coding perspective, diversity techniques often employ Alamouti coding schemes to orthogonalize transmission paths, while spatial multiplexing algorithms like Zero-Forcing or MMSE detectors separate layered data streams at the receiver.

Detailed Documentation

This section discusses MIMO (Multiple-Input Multiple-Output) technology, which primarily falls into two categories: transmit/receive diversity and spatial multiplexing. Conventional multi-antenna systems increase diversity order to combat channel fading by transmitting identical information through different paths. The receiver can obtain multiple independently faded replicas of data symbols, significantly improving reception reliability. Such techniques are commonly integrated with multi-antenna technology, which has been widely researched in mobile communications. Implementation-wise, diversity schemes often leverage orthogonal space-time block codes (e.g., Alamouti code) to ensure decodable signal combinations, while spatial multiplexing requires advanced signal processing algorithms like Singular Value Decomposition (SVD) for precoding or successive interference cancellation (SIC) detectors. Additionally, other MIMO-related concepts and applications warrant further exploration and research.

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