Title :
A fast-acquisition demodulation scheme for 2.4 GHz wireless DSSS transceiver VLSI
Author :
Lee, Hua-Chin ; Tzou, Chin-Kae ; Wang, Chorng-Kuang ; Dan, Viggen
Author_Institution :
Dept. of Electr. Eng., Nat. Central Univ., Chung-Li, Taiwan
Abstract :
In this paper, a CMOS cell based system VLSI design for Direct-Sequence Spread-Spectrum (DSSS) wireless LAN transceiver is presented. In addition, an efficient and fast-acquisition demodulation scheme is proposed to use in the receiver architecture. Implementation and testing results are also given. The proposed demodulation scheme can help to positively combine the received signal energy of multipaths so that the detection performance is improved by 3 dB in a typical frequency-selective indoor wireless communication environment. The proposed architecture can synchronize the PN code in 30 μs and the chip size is 5600×4600 μm2. It can be operated from 3.3 V to 5 V and the power consumption ranges from 189 mW to 250 mW respectively
Keywords :
CMOS digital integrated circuits; VLSI; demodulation; digital signal processing chips; indoor radio; integrated circuit design; integrated circuit testing; low-power electronics; matched filters; pseudonoise codes; quadrature phase shift keying; spread spectrum communication; synchronisation; transceivers; wireless LAN; 0.6 mum; 189 to 250 mW; 2.4 GHz; 3.3 to 5 V; 30 mus; CMOS cell based system VLSI design; COMPASS standard cell library; DQPSK demodulator; PN code synchronization; chip size; detection performance; direct-sequence spread-spectrum wireless LAN transceiver; fast-acquisition demodulation scheme; frequency-selective indoor wireless communication environment; matched filter; power consumption; received multipath signal energy; receiver architecture; testing results; Automatic frequency control; Demodulation; Matched filters; Modulation coding; Spread spectrum communication; Timing; Transceivers; Transmitters; Very large scale integration; Wireless LAN;
Conference_Titel :
VLSI Technology, Systems, and Applications, 1999. International Symposium on
Conference_Location :
Taipei
Print_ISBN :
0-7803-5620-9
DOI :
10.1109/VTSA.1999.786041
