Type of Document	Master's Thesis
Author	Cheung, Tze Chiu
Author's Email Address	tcheung@vt.edu
URN	etd-122298-205651
Title	2GHz W-CDMA Radio Transceiver
Degree	Master of Science
Department	Electrical and Computer Engineering
Advisory Committee	Advisor Name Title Sweeney, Dennis G. Committee Chair Bostian, Charles W. Committee Member Woerner, Brian D. Committee Member
Keywords	transceiver W-CDMA
Date of Defense	1998-12-15
Availability	unrestricted
Abstract A radio transceiver has been designed and built for a W-CDMA experimental system operating at 2GHz. The radio is an RF front-end for mobile terminals. The radio provides the functions of modulation and demodulation to enable transmitting and receiving digital information through the air link. The radio comprises one transmitter in conjunction with transmit power control (TPC), two independent receivers in conjunction with automatic gain control (AGC) and automatic frequency control (AFC), and one common synthesizer. Data exchange between the radio and the baseband processor takes place in an 8-bit digital format. Digital-to-analog converters (DAC) at the transmitter and analog- to-digital converters (ADC) at the receivers provide the interface between the radio and the baseband processor. DACs are also used to convert the 7-bit command codes from the processor to analog signals for the TPC, AGC and AFC. The radio transceiver is designed to meet the stringent requirements imposed by the W-CDMA system. The 70dB TPC enables the adaptive power control for combating the near-far problem. The high linearity of the transmitter provides the use of linear modulation with less than 40dBc adjacent channel power suppression. The 0.03125ppm tuning resolution of the AFC maximizes the receiver sensitivity. The 80dB AGC produces a constant demodulated signal level to the ADC regardless of the RF signal level. This thesis documents the design methodology for this radio transceiver.
Files	Filename       Size       Approximate Download Time (Hours:Minutes:Seconds)     28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access    abstract.pdf 3.11 Kb < 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01   acknow.pdf 2.68 Kb < 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01   apdx-a.pdf 7.54 Kb 00:00:02 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01   apdx-b.pdf 5.92 Kb 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01   apdx-c.pdf 94.73 Kb 00:00:26 00:00:13 00:00:11 00:00:05 < 00:00:01   apdx-d.pdf 14.86 Kb 00:00:04 00:00:02 00:00:01 < 00:00:01 < 00:00:01   apdx-e.pdf 14.90 Kb 00:00:04 00:00:02 00:00:01 < 00:00:01 < 00:00:01   ch1.pdf 8.53 Kb 00:00:02 00:00:01 00:00:01 < 00:00:01 < 00:00:01   ch2.pdf 36.56 Kb 00:00:10 00:00:05 00:00:04 00:00:02 < 00:00:01   ch3.pdf 2.87 Kb < 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01   ch3Rx.pdf 158.62 Kb 00:00:44 00:00:22 00:00:19 00:00:09 < 00:00:01   ch3Syn.pdf 41.16 Kb 00:00:11 00:00:05 00:00:05 00:00:02 < 00:00:01   ch3Tx.pdf 108.79 Kb 00:00:30 00:00:15 00:00:13 00:00:06 < 00:00:01   ch4.pdf 53.17 Kb 00:00:14 00:00:07 00:00:06 00:00:03 < 00:00:01   ch5.pdf 6.15 Kb 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01   content.pdf 6.94 Kb 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01   cover.pdf 2.27 Kb < 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01   ref.pdf 7.39 Kb 00:00:02 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01   vita.pdf 4.31 Kb 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01 < 00:00:01

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