Jung-Mao Lin

Learn More
In this paper, the authors propose an optimal detector for the Thomson’s multitaper spectral estimation (MTSE) in cognitive radios for spectrum sensing. The MTSE is used for spectral estimation and then the proposed detector can detect primary users and spectrum holes in cognitive radios. The detector is optimized based on the Neyman-Pearson Theorem. The(More)
In this paper, a single-input single-output-/multiple-input multiple-output- (SISO-/MIMO-) OFDMA uplink baseband transceiver based on IEEE 802.16e-2005 is proposed. To compensate for the interference of carrier frequency offset (CFO), an inter-carrier interference-based (ICI-cancellation- based) CFO estimator in conjunction with channel estimation and MIMO(More)
In this paper, an efficient advanced RISC machine (ARM)-based system-on-chip (SoC) testbed for a multi-input multi-output orthogonal frequency division multiple access (MIMO-OFDMA) uplink transceiver is presented. To mitigate carrier frequency offset (CFO) and multipath channel impairments, low complexity architecture of an inter-carrier interference(More)
In this paper, the authors present a configurable and power efficient multiuser MIMO-OFDMA baseband processor for uplink mobile communications. To solve the carrier frequency offset (CFO) problem in multiuser transmission, an inter-carrier interference-based (ICI-cancellation-based) CFO estimator is implemented based on an iterative search criterion of(More)
An LC-type voltage-controlled oscillator (VCO) and a push-push frequency doubler are presented for 20/40-GHz dual-band design in standard 0.13-μm CMOS. Combining the varactor with the transconductance-tuned regime, the VCO is realized to arrive at the range extension for high-frequency operation. In addition, a technique using sensitivity(More)
Without an extra on-chip accumulation-mode MOS varactor, a voltage-controlled oscillator (VCO) using a negative-transconductance back-gate tuned technique is demonstrated in a standard 0.18 μm CMOS process to achieve low-voltage, wide-range and high-frequency designs. Employing the varied p-n junction capacitance and the varied transconductance in(More)
In this paper, a 2times2 multiple-input multiple-output- orthogonal frequency division multiple access (MIMO-OFDMA) uplink transceiver based on IEEE 802.16e-2005 standard is proposed. Carrier frequency offset (CFO) and multipath channel impairments are considered. To mitigate the CFO problems in multiuser environment, an inter-carrier-interference-(More)
A fast-locking all-digital phase-locked loop (ADPLL) including a fast-locking unit, a multi-level bang-bang phase detector (ML-BBPD), a dynamic gain adjustment controller (DGAC), and a digitally controlled oscillator (DCO) is presented. The ML-BBPD provides multi-level outputs with different phase errors. According to the detection results of ML-BBPD, the(More)
In this paper, an efficient and flexible SoC platform integrated with intellectual property (IP) cores for multiinput multi-output orthogonal frequency division multiple access (MIMO-OFDMA) transceiver of IEEE802.16e-2005 standard is presented. The proposed platform supports uplink/downlink and is integrated with the evaluation system. The hardware and(More)