Browsing by Author "Kuo, Kuan-Ling"

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A 0.5V 4.85Mbps Dual-Mode Baseband Transceiver with Extended Frequency Calibration for Biotelemetry Applications
(2008)
Yu, Jui-Yuan
;
Yu, Chien-Ying
;
Huang, Shang-Bin
;
Chen, Tsan-Wen
;
Chen, Juinn-Ting
This work provides a dual-mode transceiver chipset for wireless body area network (WBAN). The modulation schemes include both MT-CDMA and OFDM. A phase-frequency tunable clock generator (PFTCG) is designed with frequency and phase tuning capability on the fly. A rotator-and-synthesizer driven (RSD) frequency pre-calibration with the aid of the PFTCG enables calibration for extended 100ppm frequency error (2.5x of state-of-the-art systems). This chip is manufactured in 90nm standard CMOS process. The supply voltage to the chip core is globally applied at 0.5V with 12 power- and voltage-domain partitions for sleep-active and voltage-scaling management. The PFTCG is operated at 5MHz with RMS jitter 145ps. The transceiver chipset provides maximum 4.85Mbps data rate with 73.7% power reduction in baseband circuit processing.
Second-Order Statistics Based Prefilter-Blind Equalization for MIMO-OFDM
(2008)
Kuo, Kuan-Ling
;
Chen, Tsan-Wen
;
Fung, Carrson C.
;
Lee, Chen-Yi
;
電子工程學系及電子研究所
In this paper, a SOS-based prefilter-blind equalizer for MIMO-OFDM system which can equalize FIR-MIMO channel at the receiver is proposed. The proposed scheme uses a set of orthogonal prefilters at the transmitter such that the transmitted signal can be colored temporally thereby satisfying the identifiability condition previously proposed by Hua and Tugnait. The scheme is shown to outperform previously proposed schemes in terms of BER and computational complexity. Simulation results have shown that the BER performance is close to that of a least-squares zero-forcing equalizer with perfect channel knowledge.