The W-CDMA scheme with parallel matched filter and its enhancement

Enhancement of the W-CDMA scheme is studied in this paper based on its characteristic evaluation of the scheme provided by the authors. The advantages of the W-CDMA are wide spreading and coherent demodulation with a pilot channel. The pilot level is optimized to give the maximum capacity of the system. New configuration of the W-CDMA is then investigated to increase transmission data rate and capacity of mobile communications. This structure, with parallel matched filter, has been proposed for synchronization and demodulation under severe multipath environments. The parallel matched filter is configured by an analog MOS device with the conventional digital circuits. The power consumption and dimension of the LSI are reduced effectively by the simultaneous approach to the system and circuit configuration.

[1]  Yasuyuki Iijima,et al.  Coherent SS Demodulation With Estimation And Compensation Of Phase Rotation Using A Pilot Channel , 2004, J. Circuits Syst. Comput..

[2]  T. Yamasaki,et al.  A floating-gate-MOS-based low-power CDMA matched filter employing capacitance disconnection technique , 2003, 2003 Symposium on VLSI Circuits. Digest of Technical Papers (IEEE Cat. No.03CH37408).

[3]  W. C. Jakes,et al.  Microwave Mobile Communications , 1974 .

[4]  George R. Cooper,et al.  A spread-spectrum technique for high-capacity mobile communications , 1978 .

[5]  Takuro Sato,et al.  Wideband CDMA system for personal radio communications , 1996 .

[6]  Takuro Sato,et al.  Wideband CDMA system for personal communications , 1995, Proceedings of ICUPC '95 - 4th IEEE International Conference on Universal Personal Communications.