Design and Implementation of Noncoherent Data Demodulation Circuit for CDMA IS-95 Receiver

• Main Authors: Liu, Jian-Shing, 劉建興
• Other Authors: Chau-Chin Su
• Format: Others
• Language: zh-TW
• Published: 1998
• Online Access: http://ndltd.ncl.edu.tw/handle/58881700469144594901

碩士 === 國立中央大學 === 電機工程學系 === 86 === This research emphasizes on the design of noncoherent data demodulation circuit forCDMA IS-95 receiver of spread spetrum mobile phone sys. The system is modeledas three part: a transmitter, a channel model, and a receiver. The transmitter is usedto generate the transmitted signal in digital format. The signal passes through the channel to reach the receiver. The receiver is composed of two parts: a timing recoverymodule and a data demodulation module. SPW and Verilog are used to simulate and verifythe design in architture and gate level. The simulations results verify that thesystem is able to handle the worst case when the chip frequcncy error 200ppm, the chipphase error is 1/2 chip time, and AWGN is -6dB. The chip has been implemented our circuit using OPUS 0.6um SPDM standard cells form Compass. The test results reassurethe functionality of design.