Multi-band zigbee transceiver supporting IEEE 802.15.4 wireless communication
First Claim
1. A multi-band ZigBee transceiver for supporting IEEE 802.15.4 wireless communications, comprising:
- a Multi-Mode Modem (MMM) for selecting 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 Industrial, Scientific and Medical (ISM) band among IEEE 802.15.4 standards in response to a received signal, and performing digital modulation/demodulation in a BaseBand (BB) according to the selected transmission standard and a transmission channel;
a frequency synthesizing unit for variably adjusting a carrier frequency according to the transmission standard selected by the MMM, and outputting the carrier frequency;
a transmission unit for receiving a digital modulated signal output from the MMM, low-pass-filtering the digital modulated signal with a bandwidth thereof being variably adjusted according to the selected transmission standard, and up-converting the filtered digital modulated signal into a Radio Frequency (RF) modulated signal corresponding to the selected transmission channel using the carrier frequency;
a receiving unit for down-converting the RF modulated signal into a BB modulated signal using the carrier frequency, low-pass-filtering the BB modulated signal with a bandwidth thereof being variably adjusted according to the selected transmission standard, converting the filtered BB modulated signal into a digital modulated signal, and outputting the digital modulated signal to the MMM; and
a transmission/reception switch unit for outputting the RF modulated signal from the transmission unit to an antenna, or outputting the RF modulated signal received from the antenna to the receiving unit.
1 Assignment
0 Petitions
Accused Products
Abstract
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.
-
Citations
16 Claims
-
1. A multi-band ZigBee transceiver for supporting IEEE 802.15.4 wireless communications, comprising:
-
a Multi-Mode Modem (MMM) for selecting 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 Industrial, Scientific and Medical (ISM) band among IEEE 802.15.4 standards in response to a received signal, and performing digital modulation/demodulation in a BaseBand (BB) according to the selected transmission standard and a transmission channel;
a frequency synthesizing unit for variably adjusting a carrier frequency according to the transmission standard selected by the MMM, and outputting the carrier frequency;
a transmission unit for receiving a digital modulated signal output from the MMM, low-pass-filtering the digital modulated signal with a bandwidth thereof being variably adjusted according to the selected transmission standard, and up-converting the filtered digital modulated signal into a Radio Frequency (RF) modulated signal corresponding to the selected transmission channel using the carrier frequency;
a receiving unit for down-converting the RF modulated signal into a BB modulated signal using the carrier frequency, low-pass-filtering the BB modulated signal with a bandwidth thereof being variably adjusted according to the selected transmission standard, converting the filtered BB modulated signal into a digital modulated signal, and outputting the digital modulated signal to the MMM; and
a transmission/reception switch unit for outputting the RF modulated signal from the transmission unit to an antenna, or outputting the RF modulated signal received from the antenna to the receiving unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. A multi-mode Radio Frequency (RF)/analog block used for a multi-band ZigBee transceiver for supporting IEEE 802.15.4 wireless communications, the transceiver performing wireless modulation/demodulation by a Multi-Mode Modem (MMM) to correspond to a transmission standard selected from 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, comprising;
-
a frequency synthesizing unit for variably adjusting a carrier frequency according to the selected transmission standard, and outputting the carrier frequency;
a transmission unit for receiving a digital modulated signal, low-pass-filtering the digital modulated signal with a bandwidth thereof being variably adjusted according to the selected transmission standard, and up-converting the filtered digital modulated signal into a Radio Frequency (RF) modulated signal corresponding to a transmission channel using the carrier frequency;
a receiving unit for down-converting the RF modulated signal into a BaseBand (BB) modulated signal using the carrier frequency, low-pass-filtering the BB modulated signal with a bandwidth thereof being variably adjusted according to the selected transmission standard, and converting the filtered BB modulated signal into a digital modulated signal; and
a transmission/reception switch unit for outputting the RF modulated signal, input from the transmission unit, to an antenna, or outputting the RF modulated signal, received from the antenna, to the receiving unit.
-
Specification