CHANNELIZATION TECHNIQUES FOR SOFTWARE DEFINED RADIO

The ability to support multiple communications channels per RF band is a fundamental process for many software defined radio platforms. These platforms typically employ a channelizer to extract channels from the received RF band for follow-on baseband processing, or to insert channels into the RF band for transmission. This paper will compare and contrast three of the more popular channelization techniques: Digital Down Conversion, Frequency Domain Filtering, and Polyphase FFT Filter Banks. The analysis begins by presenting a base architecture for a wideband transceiver, and then explores each channelization method within the context of this architecture. These include the computational complexity of the channelization approach, the applicability of the approach in supporting a given frequency plan, and processor selection for the proposed implementation.

[1]  Ravinder David Koilpillai,et al.  Efficient filterbank channelizers for software radio receivers , 1998, Proceedings of the 1998 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP '98 (Cat. No.98CH36181).

[2]  James B. Y. Tsui,et al.  Digital Techniques for Wideband Receivers , 1995 .

[3]  S. Biyiksiz,et al.  Multirate digital signal processing , 1985, Proceedings of the IEEE.

[4]  Asha K. Mehrotra,et al.  GSM System Engineering , 1997 .

[5]  M. K. Nezami.  Performance assessment of baseband algorithms for direct conversion tactical software defined receivers: I/Q imbalance correction, image rejection, DC removal, and channelization , 2002, MILCOM 2002. Proceedings.

[6]  G. W. Goo,et al.  Signal processing techniques for wideband communications systems , 1999, MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341).

[7]  Mikko Valkama,et al.  Advanced DSP for I/Q imbalance compensation in a low-IF receiver , 2000, 2000 IEEE International Conference on Communications. ICC 2000. Global Convergence Through Communications. Conference Record.

[8]  Rapid Design and Exploration of Signal Processing Systems using a VHDL Model Generator Based Paradigm1 , 1995 .

[9]  Lee Pucker,et al.  Extending the SCA core framework inside the modem architecture of a software defined radio , 2004, IEEE Communications Magazine.

[10]  John G. Proakis,et al.  Digital Signal Processing: Principles, Algorithms, and Applications , 1992 .

[11]  Ravinder David Koilpillai,et al.  Software radio issues in cellular base stations , 1999, IEEE J. Sel. Areas Commun..

[12]  Romano Fantacci,et al.  A Multirate Digital Multicarrier Demodulator: Design, Implementation, and Performance Evaluation , 1992, IEEE J. Sel. Areas Commun..

[13]  J. Gu.  ZERO-IF AND NEAR-ZERO-IF QUADRATURE RECEIVERS FOR SDR , 2002 .

[14]  F. Harris.  The discrete fourier transform applied to time domain signal processing , 1982, IEEE Communications Magazine.