Samsung Electronics Co., Ltd.

Yonsei University

Kil-Hwan Kim

Jae-seok Kim

In-hyoung Kim

Ji-Hun Koo

Hae-Dong Yeon

Joo-yeol Yang

Yun-Ho Jung

Jang-Yong Park

Mi-Suk Cho

A method for detecting soft-decisions in a 2&#xd7;2 MIMO system includes detecting all candidate symbol vector sets S in which there exist all values of a real part and an imaginary part, and calculating a log-likelihood ratio (LLR) with respect to the candidate symbol vector sets S from 

Method and apparatus for soft-decision detection in 2&#xd7;2 MIMO system

A Spatial Multiplexing Multiple Input Multiple Output (SM-MIMO) communication system, which generates Q and R matrices through QR decomposing a channel matrix in an array order corresponding to an order of transmission antennas of a signal transmission device, determines a detection order of transmission symbols included in a transmission symbol vector, QR decomposes a reception signal vector and generates the QR decomposed reception signal vector as a transformed reception signal vector, substitutes all of transmittable candidate symbols for a transmission symbol corresponding to a first detection order among the transmission symbols and sequentially removes interference in the transformed reception signal vector, detects candidate symbols of transmission symbols corresponding to a remaining detection order from the interference-removed transformed reception signal vector, combines the detected candidate symbols, detects candidate symbol vectors, and calculates Log-Likelihood Ratio values of bits included in the transmission symbols by using the detected vectors.

Apparatus and method for detecting signal in a spatial multiplexing multiple input multiple output communication system

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Seoul, South Korea

Kil-Hwan Kim