一种基于OFDM的新型低功耗RF收发器设计

A Novel Low Power RF Transceiver Based on OFDM

为实现低功耗信号传输,提出一种基于正交频分复用(OFDM)的IEEE 802.15.4g低功耗无线电频率(RF)收发器。该新型RF收发器电路由发射机(Tx)基带模拟(BBA)、片上RF开关前端、接收机(Rx)BBA及锁相环(PLL)构成,采用0.18 mm CMOS技术制作,满足了IEEE 802.15.4g OFDM系统低功耗信号传输的需要。实际测试结果显示,相比传统的RF收发器,在保持灵敏度和误包率均不降低的条件下,提出的RF收发器具有更低的功耗,当电源电压为1.8 V时,Tx模式下功耗为26.46 m W,Rx模式下功耗为28.26 m W。

In order to realize low power consumption,a low power IEEE 802.15.4g radio frequency（RF）transceiver based on OFDM is proposed. The radio frequency（RF）transceiver circuit is composed of the on-chip RF switch front-end,TX BBA（Analog Baseband）,RX BBA and phase-locked loop（PLL）,fabricated using 0.18 μm CMOS technology. The actual test results show that the proposed RF transceiver has lower power consumption and good sensitivity compared with the traditional RF transceiver. When the power supply voltage is 1.8 V,the proposed RF transceiver will consume 14.7 mA in Tx mode,and 15.7 mA in Rx mode.