Browsing by Author "Chuang, Gene C. -H."

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A K-BEST ORTHOGONAL MATCHING PURSUIT FOR COMPRESSIVE SENSING
(2013)
Lin, Pu-Hsuan
;
Tsai, Shang-Ho
;
Chuang, Gene C. -H.
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
This paper proposes an orthogonal matching pursuit (OMP-) based recovering algorithm for compressive sensing problems. This algorithm can significantly improve recovering performance while it can still maintain reasonable computational complexity. Complexity analysis and simulation results are provided for the proposed algorithm and compared with other popular recovering schemes. We observe that the proposed algorithm can significantly improve the exact recovering performance compared to the OMP scheme. Moreover, in the cases with high compressed ratio, the proposed algorithm can even outperform the benchmark performance achieved by the subspace programming and linear programming.
VLSI Implementation of a Low Complexity 4x4 MIMO Sphere Decoder with Table Enumeration
(2013)
Yang, Kai-Jiun
;
Tsai, Shang-Ho
;
Chang, Ruei-Ching
;
Chen, Yan-Cheng
;
Chuang, Gene C. -H.
In this work a sphere decoder with low complexity is proposed and implemented. We propose a simplified norm algorithm, which is called admissible set elimination (ASE), to dramatically decrease the number of searching nodes. In addition, the decoder uses table- look-up to acquire the enumeration order of different constellations. As a result, the critical path is shortened and the throughput is enhanced. Compared to the optimal ML detector, the proposed scheme greatly improves the complexity and throughput, while the performance only degrades around 0.5 dB. The proposed scheme is fabricated by a TSMC 90 nm process. The area is 0.85 mm(2), and the average throughput can be up to 411.3 Mbps when the clock rate is 108.7 MHz.