The Experts below are selected from a list of 216 Experts worldwide ranked by ideXlab platform
Chunhuat Heng - One of the best experts on this subject based on the ideXlab platform.
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a low power compact ieee 802 15 6 compatible human body communication transceiver with digital sigma delta iir mask shaping
IEEE Journal of Solid-state Circuits, 2019Co-Authors: Bo Zhao, Yong Lian, Ali M Niknejad, Chunhuat HengAbstract:Human body communication (HBC) will play an important role in wireless body area networks (WBANs) because of its low power and low hardware cost. However, the low-frequency band of HBC transmitting signal could potentially interfere with the vital signs such as electrocardiography (ECG) and electromyography (EMG), especially for the frequency below 2 MHz. In this paper, a new mask-shaping technique is proposed for the HBC transmitter to suppress the mask below 2 MHz, where a digital sigma–delta truncated infinite impulse response (SDTIIR) filter provides sufficient rejection with a digital-to-analog converter (DAC) of only 8 bits. To save the die area, a single-ended receiver is designed with dc-coupled blocks, whereas a digital calibration technique is employed to eliminate the static dc offset. The proposed techniques are implemented in the 65 nm CMOS process, demonstrating a sub-millimeter-sized IEEE 802.15.6 compatible HBC transceiver Chip. Measurements show that the transmitter achieves a rejection of −86.5 dBr at 2 MHz with 3.52 mW power. Consuming 620 $\mu \text{W}$ , the receiver achieves a sensitivity of −72 dBm at a Chip Rate of 5.25 Mc/s and a bit error Rate (BER) less than 10−7.
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a low power compact ieee 802 15 6 compatible human body communication transceiver with digital sigma delta iir mask shaping
IEEE Journal of Solid-state Circuits, 2019Co-Authors: Bo Zhao, Yong Lian, Ali M Niknejad, Chunhuat HengAbstract:Human body communication (HBC) will play an important role in wireless body area networks (WBANs) because of its low power and low hardware cost. However, the low-frequency band of HBC transmitting signal could potentially interfere with the vital signs such as electrocardiography (ECG) and electromyography (EMG), especially for the frequency below 2 MHz. In this paper, a new mask-shaping technique is proposed for the HBC transmitter to suppress the mask below 2 MHz, where a digital sigma–delta truncated infinite impulse response (SDTIIR) filter provides sufficient rejection with a digital-to-analog converter (DAC) of only 8 bits. To save the die area, a single-ended receiver is designed with dc-coupled blocks, whereas a digital calibration technique is employed to eliminate the static dc offset. The proposed techniques are implemented in the 65 nm CMOS process, demonstrating a sub-millimeter-sized IEEE 802.15.6 compatible HBC transceiver Chip. Measurements show that the transmitter achieves a rejection of −86.5 dBr at 2 MHz with 3.52 mW power. Consuming 620 $\mu \text{W}$ , the receiver achieves a sensitivity of −72 dBm at a Chip Rate of 5.25 Mc/s and a bit error Rate (BER) less than 10−7.
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a low power compact ieee 802 15 6 compatible human body communication transceiver with digital sigma delta iir mask shaping
European Solid-State Circuits Conference, 2017Co-Authors: Bo Zhao, Yong Lian, Ali M Niknejad, Chunhuat HengAbstract:To enhance the mask rejection below 2 MHz for effective human body communication (HBC), a new mask shaping technique is proposed for the HBC transmitter, where a digital sigma-delta modulated infinite impulse response (IIR) filter provides sufficient rejection with a digital-to-analog converter (DAC) of only 8 bits. A receiver with high input impedance is designed to improve the sensitivity, and a digital calibration technique is employed to eliminate the DC-to-DC offset. The proposed techniques are implemented in 65nm CMOS process, and a sub-mm sized IEEE 802.15.6 compatible HBC transceiver is demonstRated. Measurements show that the transmitter achieves a rejection of −86.5 dBr at 2 MHz with a power consumption of 3.52 mW. Consuming 620 μW, the receiver achieves a sensitivity of −72 dBm at a Chip Rate of 5.25 Mcps and a bit error Rate (BER) less than 10−7.
Bo Zhao - One of the best experts on this subject based on the ideXlab platform.
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a low power compact ieee 802 15 6 compatible human body communication transceiver with digital sigma delta iir mask shaping
IEEE Journal of Solid-state Circuits, 2019Co-Authors: Bo Zhao, Yong Lian, Ali M Niknejad, Chunhuat HengAbstract:Human body communication (HBC) will play an important role in wireless body area networks (WBANs) because of its low power and low hardware cost. However, the low-frequency band of HBC transmitting signal could potentially interfere with the vital signs such as electrocardiography (ECG) and electromyography (EMG), especially for the frequency below 2 MHz. In this paper, a new mask-shaping technique is proposed for the HBC transmitter to suppress the mask below 2 MHz, where a digital sigma–delta truncated infinite impulse response (SDTIIR) filter provides sufficient rejection with a digital-to-analog converter (DAC) of only 8 bits. To save the die area, a single-ended receiver is designed with dc-coupled blocks, whereas a digital calibration technique is employed to eliminate the static dc offset. The proposed techniques are implemented in the 65 nm CMOS process, demonstrating a sub-millimeter-sized IEEE 802.15.6 compatible HBC transceiver Chip. Measurements show that the transmitter achieves a rejection of −86.5 dBr at 2 MHz with 3.52 mW power. Consuming 620 $\mu \text{W}$ , the receiver achieves a sensitivity of −72 dBm at a Chip Rate of 5.25 Mc/s and a bit error Rate (BER) less than 10−7.
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a low power compact ieee 802 15 6 compatible human body communication transceiver with digital sigma delta iir mask shaping
IEEE Journal of Solid-state Circuits, 2019Co-Authors: Bo Zhao, Yong Lian, Ali M Niknejad, Chunhuat HengAbstract:Human body communication (HBC) will play an important role in wireless body area networks (WBANs) because of its low power and low hardware cost. However, the low-frequency band of HBC transmitting signal could potentially interfere with the vital signs such as electrocardiography (ECG) and electromyography (EMG), especially for the frequency below 2 MHz. In this paper, a new mask-shaping technique is proposed for the HBC transmitter to suppress the mask below 2 MHz, where a digital sigma–delta truncated infinite impulse response (SDTIIR) filter provides sufficient rejection with a digital-to-analog converter (DAC) of only 8 bits. To save the die area, a single-ended receiver is designed with dc-coupled blocks, whereas a digital calibration technique is employed to eliminate the static dc offset. The proposed techniques are implemented in the 65 nm CMOS process, demonstrating a sub-millimeter-sized IEEE 802.15.6 compatible HBC transceiver Chip. Measurements show that the transmitter achieves a rejection of −86.5 dBr at 2 MHz with 3.52 mW power. Consuming 620 $\mu \text{W}$ , the receiver achieves a sensitivity of −72 dBm at a Chip Rate of 5.25 Mc/s and a bit error Rate (BER) less than 10−7.
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a low power compact ieee 802 15 6 compatible human body communication transceiver with digital sigma delta iir mask shaping
European Solid-State Circuits Conference, 2017Co-Authors: Bo Zhao, Yong Lian, Ali M Niknejad, Chunhuat HengAbstract:To enhance the mask rejection below 2 MHz for effective human body communication (HBC), a new mask shaping technique is proposed for the HBC transmitter, where a digital sigma-delta modulated infinite impulse response (IIR) filter provides sufficient rejection with a digital-to-analog converter (DAC) of only 8 bits. A receiver with high input impedance is designed to improve the sensitivity, and a digital calibration technique is employed to eliminate the DC-to-DC offset. The proposed techniques are implemented in 65nm CMOS process, and a sub-mm sized IEEE 802.15.6 compatible HBC transceiver is demonstRated. Measurements show that the transmitter achieves a rejection of −86.5 dBr at 2 MHz with a power consumption of 3.52 mW. Consuming 620 μW, the receiver achieves a sensitivity of −72 dBm at a Chip Rate of 5.25 Mcps and a bit error Rate (BER) less than 10−7.
Yong Lian - One of the best experts on this subject based on the ideXlab platform.
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a low power compact ieee 802 15 6 compatible human body communication transceiver with digital sigma delta iir mask shaping
IEEE Journal of Solid-state Circuits, 2019Co-Authors: Bo Zhao, Yong Lian, Ali M Niknejad, Chunhuat HengAbstract:Human body communication (HBC) will play an important role in wireless body area networks (WBANs) because of its low power and low hardware cost. However, the low-frequency band of HBC transmitting signal could potentially interfere with the vital signs such as electrocardiography (ECG) and electromyography (EMG), especially for the frequency below 2 MHz. In this paper, a new mask-shaping technique is proposed for the HBC transmitter to suppress the mask below 2 MHz, where a digital sigma–delta truncated infinite impulse response (SDTIIR) filter provides sufficient rejection with a digital-to-analog converter (DAC) of only 8 bits. To save the die area, a single-ended receiver is designed with dc-coupled blocks, whereas a digital calibration technique is employed to eliminate the static dc offset. The proposed techniques are implemented in the 65 nm CMOS process, demonstrating a sub-millimeter-sized IEEE 802.15.6 compatible HBC transceiver Chip. Measurements show that the transmitter achieves a rejection of −86.5 dBr at 2 MHz with 3.52 mW power. Consuming 620 $\mu \text{W}$ , the receiver achieves a sensitivity of −72 dBm at a Chip Rate of 5.25 Mc/s and a bit error Rate (BER) less than 10−7.
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a low power compact ieee 802 15 6 compatible human body communication transceiver with digital sigma delta iir mask shaping
IEEE Journal of Solid-state Circuits, 2019Co-Authors: Bo Zhao, Yong Lian, Ali M Niknejad, Chunhuat HengAbstract:Human body communication (HBC) will play an important role in wireless body area networks (WBANs) because of its low power and low hardware cost. However, the low-frequency band of HBC transmitting signal could potentially interfere with the vital signs such as electrocardiography (ECG) and electromyography (EMG), especially for the frequency below 2 MHz. In this paper, a new mask-shaping technique is proposed for the HBC transmitter to suppress the mask below 2 MHz, where a digital sigma–delta truncated infinite impulse response (SDTIIR) filter provides sufficient rejection with a digital-to-analog converter (DAC) of only 8 bits. To save the die area, a single-ended receiver is designed with dc-coupled blocks, whereas a digital calibration technique is employed to eliminate the static dc offset. The proposed techniques are implemented in the 65 nm CMOS process, demonstrating a sub-millimeter-sized IEEE 802.15.6 compatible HBC transceiver Chip. Measurements show that the transmitter achieves a rejection of −86.5 dBr at 2 MHz with 3.52 mW power. Consuming 620 $\mu \text{W}$ , the receiver achieves a sensitivity of −72 dBm at a Chip Rate of 5.25 Mc/s and a bit error Rate (BER) less than 10−7.
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a low power compact ieee 802 15 6 compatible human body communication transceiver with digital sigma delta iir mask shaping
European Solid-State Circuits Conference, 2017Co-Authors: Bo Zhao, Yong Lian, Ali M Niknejad, Chunhuat HengAbstract:To enhance the mask rejection below 2 MHz for effective human body communication (HBC), a new mask shaping technique is proposed for the HBC transmitter, where a digital sigma-delta modulated infinite impulse response (IIR) filter provides sufficient rejection with a digital-to-analog converter (DAC) of only 8 bits. A receiver with high input impedance is designed to improve the sensitivity, and a digital calibration technique is employed to eliminate the DC-to-DC offset. The proposed techniques are implemented in 65nm CMOS process, and a sub-mm sized IEEE 802.15.6 compatible HBC transceiver is demonstRated. Measurements show that the transmitter achieves a rejection of −86.5 dBr at 2 MHz with a power consumption of 3.52 mW. Consuming 620 μW, the receiver achieves a sensitivity of −72 dBm at a Chip Rate of 5.25 Mcps and a bit error Rate (BER) less than 10−7.
Ali M Niknejad - One of the best experts on this subject based on the ideXlab platform.
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a low power compact ieee 802 15 6 compatible human body communication transceiver with digital sigma delta iir mask shaping
IEEE Journal of Solid-state Circuits, 2019Co-Authors: Bo Zhao, Yong Lian, Ali M Niknejad, Chunhuat HengAbstract:Human body communication (HBC) will play an important role in wireless body area networks (WBANs) because of its low power and low hardware cost. However, the low-frequency band of HBC transmitting signal could potentially interfere with the vital signs such as electrocardiography (ECG) and electromyography (EMG), especially for the frequency below 2 MHz. In this paper, a new mask-shaping technique is proposed for the HBC transmitter to suppress the mask below 2 MHz, where a digital sigma–delta truncated infinite impulse response (SDTIIR) filter provides sufficient rejection with a digital-to-analog converter (DAC) of only 8 bits. To save the die area, a single-ended receiver is designed with dc-coupled blocks, whereas a digital calibration technique is employed to eliminate the static dc offset. The proposed techniques are implemented in the 65 nm CMOS process, demonstrating a sub-millimeter-sized IEEE 802.15.6 compatible HBC transceiver Chip. Measurements show that the transmitter achieves a rejection of −86.5 dBr at 2 MHz with 3.52 mW power. Consuming 620 $\mu \text{W}$ , the receiver achieves a sensitivity of −72 dBm at a Chip Rate of 5.25 Mc/s and a bit error Rate (BER) less than 10−7.
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a low power compact ieee 802 15 6 compatible human body communication transceiver with digital sigma delta iir mask shaping
IEEE Journal of Solid-state Circuits, 2019Co-Authors: Bo Zhao, Yong Lian, Ali M Niknejad, Chunhuat HengAbstract:Human body communication (HBC) will play an important role in wireless body area networks (WBANs) because of its low power and low hardware cost. However, the low-frequency band of HBC transmitting signal could potentially interfere with the vital signs such as electrocardiography (ECG) and electromyography (EMG), especially for the frequency below 2 MHz. In this paper, a new mask-shaping technique is proposed for the HBC transmitter to suppress the mask below 2 MHz, where a digital sigma–delta truncated infinite impulse response (SDTIIR) filter provides sufficient rejection with a digital-to-analog converter (DAC) of only 8 bits. To save the die area, a single-ended receiver is designed with dc-coupled blocks, whereas a digital calibration technique is employed to eliminate the static dc offset. The proposed techniques are implemented in the 65 nm CMOS process, demonstrating a sub-millimeter-sized IEEE 802.15.6 compatible HBC transceiver Chip. Measurements show that the transmitter achieves a rejection of −86.5 dBr at 2 MHz with 3.52 mW power. Consuming 620 $\mu \text{W}$ , the receiver achieves a sensitivity of −72 dBm at a Chip Rate of 5.25 Mc/s and a bit error Rate (BER) less than 10−7.
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a low power compact ieee 802 15 6 compatible human body communication transceiver with digital sigma delta iir mask shaping
European Solid-State Circuits Conference, 2017Co-Authors: Bo Zhao, Yong Lian, Ali M Niknejad, Chunhuat HengAbstract:To enhance the mask rejection below 2 MHz for effective human body communication (HBC), a new mask shaping technique is proposed for the HBC transmitter, where a digital sigma-delta modulated infinite impulse response (IIR) filter provides sufficient rejection with a digital-to-analog converter (DAC) of only 8 bits. A receiver with high input impedance is designed to improve the sensitivity, and a digital calibration technique is employed to eliminate the DC-to-DC offset. The proposed techniques are implemented in 65nm CMOS process, and a sub-mm sized IEEE 802.15.6 compatible HBC transceiver is demonstRated. Measurements show that the transmitter achieves a rejection of −86.5 dBr at 2 MHz with a power consumption of 3.52 mW. Consuming 620 μW, the receiver achieves a sensitivity of −72 dBm at a Chip Rate of 5.25 Mcps and a bit error Rate (BER) less than 10−7.
Xiaohong Shen - One of the best experts on this subject based on the ideXlab platform.
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hypothesis feedback equalization for multicode direct sequence spread spectrum underwater communications
European Signal Processing Conference, 2006Co-Authors: Jianguo Huang, Xiaohong ShenAbstract:In this paper, multicode direct-sequence spread spectrum is considered to achieve high-speed data transmission in underwater acoustic channel, where extended multipath and rapid time-variability is encountered and the conventional RAKE receiver usually fails to function. To track and compensate the channel distortion, a decentralized hypothesis-feedback equalization (HFE) algorithm [1] which updates coefficients at Chip Rate is a promising method and has been used in multi-user underwater communication. But for multicode system, its performance is degraded by inter-channel interference (ICI). For this reason, a parallel interference cancellation hypothesis-feedback equalization (PIC-HFE) algorithm is proposed, which combines the capabilities of tracking the time-varying channel and suppressing the ICI. Simulation results proved that the proposed algorithm could significantly improve the performance of multicode system.