Title :
A CMOS Multi-LO Frequency Synthesizer Block for MB-OFDM UWB Systems
Author :
Kim, Chang-Wan ; Park, Bong-Hyuk ; Lee, Seung-Sik ; Choi, Sang-Sung ; Lee, Sang-Gug
Author_Institution :
Electron. & Telecommun. Res. Inst., Daejeon
Abstract :
A multi-LO frequency synthesizer block for MB-OFDM UWB systems is proposed, which is implemented in 0.18 mum CMOS technology. The proposed frequency synthesizer can provide three LO tones and quadrature IF LO tone from only one VCO. Based on an optimized frequency plan, it uses fewest nonlinear components like divide-by-N and mixer to suppress unwanted spurious tones. Its measured in-band sideband suppression ratio is more than 30 dBc for three sub-bands and it consumes only 17.6 mA from a 1.8 V supply.
Keywords :
CMOS analogue integrated circuits; OFDM modulation; frequency synthesizers; ultra wideband communication; voltage-controlled oscillators; CMOS multiLO frequency synthesizer block; MB-OFDM UWB systems; VCO; current 17.6 mA; frequency planning; in-band sideband suppression ratio; nonlinear components; quadrature IF LO tone; size 0.18 mum; voltage 1.8 V; Amplitude modulation; CMOS technology; Data communication; Filters; Frequency conversion; Frequency synthesizers; Radiofrequency integrated circuits; Transceivers; Ultra wideband technology; Voltage-controlled oscillators;
Conference_Titel :
Vehicular Technology Conference, 2006. VTC-2006 Fall. 2006 IEEE 64th
Conference_Location :
Montreal, Que.
Print_ISBN :
1-4244-0062-7
Electronic_ISBN :
1-4244-0063-5
DOI :
10.1109/VTCF.2006.606
