Mixed Analog and Digital Matched-Filter Design for High Rate WLAN

A mixed-signal programmable filter suitable for high- rate WLAN is addressed in this work. The proposed filter has analog input and analog-sampled outputs. The filter taps are stored in a digital memory and can be changed easily to meet any receiver requirements. The filter structure is based on a bank of digitally controlled transconductors realized by simple CMOS inverters and thus can be integrated efficiently with digital parts. A cosine rolloff filter is designed and investigated by simulation in frequency domains. Comparison with other recent works shows that the proposed structure has a good speed-complexity-consumption trade-off.

[1]  V. Srinivasan,et al.  Low-power realization of FIR filters using current-mode analog design techniques , 2004, Conference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers, 2004..

[2]  H. Loeliger,et al.  Probability propagation and decoding in analog VLSI , 1998, Proceedings. 1998 IEEE International Symposium on Information Theory (Cat. No.98CH36252).

[3]  Bram Nauta,et al.  A CMOS transconductance-C filter technique for very high frequencies , 1992 .

[4]  Tughrul Arslan,et al.  Architectural trade-offs in the design of low power FIR filtering cores , 2004 .

[5]  H. Tenhunen,et al.  Cost and performance tradeoff analysis in radio and mixed-signal system-on-package design , 2004, IEEE Transactions on Advanced Packaging.

[6]  Joachim Hagenauer,et al.  The analog decoder , 1998, Proceedings. 1998 IEEE International Symposium on Information Theory (Cat. No.98CH36252).

[7]  Gian Carlo Cardarilli,et al.  Power characterization of digital filters implemented on FPGA , 2002, 2002 IEEE International Symposium on Circuits and Systems. Proceedings (Cat. No.02CH37353).

[8]  R. Storn.  Designing nonstandard filters with differential evolution , 2005, IEEE Signal Process. Mag..

[9]  James D. Meindl,et al.  A physical alpha-power law MOSFET model , 1999 .

[10]  D.J. Allstot,et al.  FIR filtering using CMOS switched-current techniques , 1990, IEEE International Symposium on Circuits and Systems.