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標題: A high-speed SDM-MIMO decoder using efficient candidate searching for wireless communication
作者: Lin, H.L.
Chang, R.C.
Chen, H.L.
關鍵字: digital communication;maximum-likelihood (ML) detection;space-division;multiplexing (SDM) multiple-input-multiple output (MIMO) detector;sphere decoder;wireless systems;implementation
Project: Ieee Transactions on Circuits and Systems Ii-Express Briefs
期刊/報告no:: Ieee Transactions on Circuits and Systems Ii-Express Briefs, Volume 55, Issue 3, Page(s) 289-293.
In this brief, a high-speed space-division multiplexing (SDM) multiple-input-multiple output (MIMO) decoder using efficient candidate searching is proposed by exploiting the characteristics of QR decomposition and sphere decoder for high throughput rate and low hardware-complexity. A process of efficient candidate searching by shifting the center of constellation with scalable radius reduces the processing time and improves the operational frequency. The proposed architecture can operate at a 166-MHz clock frequency, and the core area is smaller than results from using the K-best SD algorithm since large memory is not required to store extreme candidate paths. In our implementation, the core area is 0.675 mm(2) using TSNIC 90-nm technology. The average throughput of the proposed SDM-MIMO decoder is 95 Mbps with 64-QAM modulation at 30-dB signal-to-noise ratio.
ISSN: 1549-7747
DOI: 10.1109/tcsii.2008.918973
Appears in Collections:電機工程學系所

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