A quad-band W-CDMA transceiver IC-direct conversion architecture with fractional frequency divider

作者：Kamizuma Hiroshi^*; Akamine Yukinori; Yamawaki Taizo; Hikasa Kazuhiko

来源：IEEJ Transactions on Electrical and Electronic Engineering, 2013, 8(1): 49-55.

DOI：10.1002/tee.21790

• W-CDMA
• multiband
• direct conversion
• frequency divider
• phase shifter
• injection locking

A quad-band (0.8, 1.7, 2, and 1.4 GHz) wideband code division multiple access (W-CDMA) transceiver, which uses a divide-by-2.5 frequency divider in local parts of a direct-conversion architecture, has been developed. Using the fractional-2.5 frequency divider reduces the fractional bandwidth of the voltage-controlled oscillator and avoids injection locking of the local RF synthesizer perfectly. This transceiver achieved 3% error-vector magnitude and46 dB ACLR, which satisfy the margin given in standard specifications.

• 出版日期2013-1