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    • 8. 发明授权
    • Multi-band ZigBee transceiver supporting IEEE 802.15.4 wireless communication
    • 支持IEEE 802.15.4无线通信的多频ZigBee收发器
    • US07260360B2
    • 2007-08-21
    • US10981789
    • 2004-11-05
    • Hae Moon SeoKwang Ho WonYoung Kuk ParkMyung Hyun YoonJun Jae Yoo
    • Hae Moon SeoKwang Ho WonYoung Kuk ParkMyung Hyun YoonJun Jae Yoo
    • H04B7/00H04M1/00
    • H04M1/72522H04B1/40H04M2250/06
    • Disclosed herein is a multi-band ZigBee transceiver for supporting IEEE 802.15.4 wireless communications. In the multi-band ZigBee transceiver, a Multi-Mode Modem (MMM) selects any one of a European version standard using 860 MHz band, a US version standard using 920 MHz band, and a worldwide version standard using 2.4 GHz ISM band among IEEE 802.15.4 standards. A frequency synthesizing unit variably adjusts a carrier frequency according to the transmission standard. A transmission unit receives a digital modulated signal, low-pass-filters the digital modulated signal with a bandwidth thereof being variably adjusted, and up-converts the filtered digital modulated signal into an RF modulated signal corresponding to the selected transmission channel. A receiving unit down-converts the RF modulated signal into a BB modulated signal using the carrier frequency, low-pass-filters the BB modulated signal with a bandwidth thereof being variably adjusted according to the selected transmission standard, converts the filtered BB modulated signal into a digital modulated signal, and outputs the digital modulated signal to the MMM. A transmission/reception switch unit outputs the RF modulated signal, input from the transmission unit, to an antenna, or outputs the RF modulated signal, received from the antenna, to the receiving unit.
    • 这里公开了一种用于支持IEEE 802.15.4无线通信的多频带ZigBee收发器。 在多频ZigBee收发器中,多模式调制解调器(MMM)选择使用860 MHz频段的欧洲版本标准,使用920 MHz频段的美国版本标准和使用2.4 GHz ISM频段的全球版本标准 802.15.4标准。 频率合成单元根据传输标准可变地调整载波频率。 发送单元接收数字调制信号,对其数字调制信号进行可变调整的带宽的低通滤波,并且将滤波后的数字调制信号上变频为对应于选择的发送信道的RF调制信号。 接收单元使用载波频率将RF调制信号下变频为BB调制信号,对BB调制信号进行低通滤波,其带宽根据选定的传输标准进行可变调整,将经过滤波的BB调制信号转换为 数字调制信号,并将数字调制信号输出到MMM。 发送/接收开关单元将从发送单元输入的RF调制信号输出到天线,或者将从天线接收的RF调制信号输出到接收单元。