A new architecture of matched-filter bank for high-speed code acquisition of ZCZ-CDMA system

We propose a new architecture of matched-filter (MF) bank for the code acquisition of ZCZ-CDMA system. The ZCZ-CDMA system can accurately detect multipath properties and greatly improve data transmission efficiency by using the special properties of the zero correlation zones (ZCZ) sequence. As a traditional matched-filter bank is used to carry out the code acquisition and the despreading operations to realize the information transmission at 20Mbps in the ZCZ-CDMA system, the circuit scale is too large and the power consumption is too high. Using our proposed new matched-filter bank, the circuit scale and the power consumption is greatly reduced. The high-speed and lower power VLSI design of the new matched-filter bank is implemented on FPGA.

[1]  Tapani Ristaniemi,et al.  Code timing acquisition for DS-CDMA in fading channels by differential correlations , 2001, IEEE Trans. Commun..

[2]  Naoki Suehiro,et al.  Class of binary sequences with zero correlation zone , 1999 .

[3]  Naoki Suehiro,et al.  N-shift cross-orthogonal sequences , 1988, IEEE Trans. Inf. Theory.

[4]  Pingzhi Fan,et al.  SEQUENCE DESIGN FOR COMMUNICATIONS APPLICATIONS , 1996 .

[5]  Jian Li,et al.  An efficient code-timing estimator for receiver diversity DS-CDMA systems , 1997, Conference Record of the Thirty-First Asilomar Conference on Signals, Systems and Computers (Cat. No.97CB36136).

[6]  Kuei-Ann Wen,et al.  A programmable pipelined digital differential matched filter for DSSS receiver , 2001, IEEE J. Sel. Areas Commun..

[7]  Behnaam Aazhang,et al.  Maximum-likelihood synchronization of a single user for code-division multiple-access communication systems , 1998, IEEE Trans. Commun..

[8]  Erik G. Ström,et al.  An efficient code-timing estimator for DS-CDMA signals , 1997, IEEE Trans. Signal Process..

[9]  Naoki Suehiro,et al.  A high speed matched-filter for ZCZ-CDMA communications , 2002, 6th International Conference on Signal Processing, 2002..

[10]  Naoki Suehiro,et al.  A signal design without co-channel interference for approximately synchronized CDMA systems , 1994, IEEE J. Sel. Areas Commun..