This paper explores an energy-efficient pulsed ultra-wideband（UWB） radio-frequency（RF） front-end chip fabricated in 0.18-μm CMOS technology, including a transmitter, receiver, and fractional synthesizer. The tran...This paper explores an energy-efficient pulsed ultra-wideband（UWB） radio-frequency（RF） front-end chip fabricated in 0.18-μm CMOS technology, including a transmitter, receiver, and fractional synthesizer. The transmitter adopts a digital offset quadrature phase-shift keying（O-QPSK） modulator and passive direct-phase multiplexing technology, which are energy-and hardware-efficient, to enhance the data rate for a given spectrum.A passive mixer and a capacitor cross-coupled（CCC） source-follower driving amplifier（DA） are also designed for the transmitter to further reduce the low power consumption. For the receiver, a power-aware low-noise amplifier（LNA） and a quadrature mixer are applied. The LNA adopts a CCC boost common-gate amplifier as the input stage, and its current is reused for the second stage to save power. The mixer uses a shared amplification stage for the following passive IQ mixer. Phase noise suppression of the phase-locked loop（PLL） is achieved by utilizing an even-harmonics-nulled series-coupled quadrature oscillator（QVCO） and an in-band noise-aware charge pump（CP） design. The transceiver achieves a measured data rate of 0.8 Gbps with power consumption of 16 m W and31.5 m W for the transmitter and the receiver, respectively. The optimized integrated phase noise of the PLL is0.52° at 4.025 GHz.展开更多
本文研究并实现了一种基于射频识别2.45GHz空中接口协议的O-QPSK发射机仿真方法。射频识别(RFID,Radio Frequency Identification)是一种无线通信技术,其中微波2.45GHz具有高的带宽和通讯速率、更长的工作距离、更小的天线尺寸等优点。...本文研究并实现了一种基于射频识别2.45GHz空中接口协议的O-QPSK发射机仿真方法。射频识别(RFID,Radio Frequency Identification)是一种无线通信技术,其中微波2.45GHz具有高的带宽和通讯速率、更长的工作距离、更小的天线尺寸等优点。通过MATLAB算法仿真与2.45GHz原型平台验证相结合,快速实现并验证发射机算法正确性。展开更多
基金Project supported by the National Science and Technology Major Project of China(No.2011ZX03004-002-01)
文摘This paper explores an energy-efficient pulsed ultra-wideband（UWB） radio-frequency（RF） front-end chip fabricated in 0.18-μm CMOS technology, including a transmitter, receiver, and fractional synthesizer. The transmitter adopts a digital offset quadrature phase-shift keying（O-QPSK） modulator and passive direct-phase multiplexing technology, which are energy-and hardware-efficient, to enhance the data rate for a given spectrum.A passive mixer and a capacitor cross-coupled（CCC） source-follower driving amplifier（DA） are also designed for the transmitter to further reduce the low power consumption. For the receiver, a power-aware low-noise amplifier（LNA） and a quadrature mixer are applied. The LNA adopts a CCC boost common-gate amplifier as the input stage, and its current is reused for the second stage to save power. The mixer uses a shared amplification stage for the following passive IQ mixer. Phase noise suppression of the phase-locked loop（PLL） is achieved by utilizing an even-harmonics-nulled series-coupled quadrature oscillator（QVCO） and an in-band noise-aware charge pump（CP） design. The transceiver achieves a measured data rate of 0.8 Gbps with power consumption of 16 m W and31.5 m W for the transmitter and the receiver, respectively. The optimized integrated phase noise of the PLL is0.52° at 4.025 GHz.
文摘本文研究并实现了一种基于射频识别2.45GHz空中接口协议的O-QPSK发射机仿真方法。射频识别(RFID,Radio Frequency Identification)是一种无线通信技术,其中微波2.45GHz具有高的带宽和通讯速率、更长的工作距离、更小的天线尺寸等优点。通过MATLAB算法仿真与2.45GHz原型平台验证相结合,快速实现并验证发射机算法正确性。
