Title :
Reverse link demodulator ASIC for CDMA cellular system
Author :
Hyun, Jin-il ; Cha, Jin-Jong ; Kang, In ; Kim, Jaeseok ; Kim, Kyungsoo
Author_Institution :
VLSI Archit. Section, ETRI, Taejon, South Korea
Abstract :
In this paper, we describe the design and implementation of a code division multiple access (CDMA) base station demodulator (CBD) ASIC for the use in the IS95-based CDMA mobile communication system. We propose a novel design method for the noncoherent OQPSK PN correlator, fast Hadamard transformer (FHT), lock detector, and time tracking loop, which are the main functional blocks of the demodulator. We also present the implementation environment for the design and verification of the demodulator ASIC. The chip has been designed using a cell-based design methodology and fabricated by double-metal 0.8-μm CMOS technology. The die of the chip measures 8.1×8.3 mm and it contains approximately 75000 logic gates and 3000 bits of static RAM
Keywords :
CMOS digital integrated circuits; Hadamard transforms; application specific integrated circuits; cellular radio; code division multiple access; demodulators; digital radio; digital signal processing chips; quadrature phase shift keying; telecommunication computing; 0.8 micron; 3 kbit; CDMA cellular system; IS95-based CDMA mobile communication system; base station demodulator; cell-based design methodology; code division multiple access; double-metal CMOS technology; fast Hadamard transformer; lock detector; noncoherent OQPSK PN correlator; onchip static RAM; reverse link demodulator ASIC; time tracking loop; Application specific integrated circuits; Base stations; CMOS technology; Correlators; Demodulation; Design methodology; Detectors; Mobile communication; Multiaccess communication; Tracking loops;
Conference_Titel :
Circuits and Systems, 1996. ISCAS '96., Connecting the World., 1996 IEEE International Symposium on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3073-0
DOI :
10.1109/ISCAS.1996.541955
