A noncoherent GMSK receiver for software radio

A noncoherent GMSK receiver suitable for software radio is proposed. It is an I/Q structured receiver with a joint symbol timing error and frequency offset estimator based on discrimination and FFT calculation through a specified preamble. A matched filter suitable for this type of noncoherent GMSK receiver is investigated and differential detection is used to recovery the original data. Finally, bit error rate (BER) performances are offered via computer simulation. Compared with the optimal coherent receiver, the proposed receiver is significant due to its smaller implementation complexity. It also has a better performance and is more suitable to implement on common software radio platforms compared with typical noncoherent receivers.

[1]  A. Wittneben,et al.  A low cost noncoherent receiver with adaptive antenna combining for high speed wireless LANs , 1997, 1997 IEEE 47th Vehicular Technology Conference. Technology in Motion.

[2]  Heinz Mathis.  Differential detection of GMSK signals with low BtT using the SOVA , 1998, IEEE Trans. Commun..

[3]  John P. Fonseka.  Noncoherent detection with Viterbi decoding for GMSK signals , 1996 .

[4]  Tung-Sang Ng,et al.  New implementation of a GMSK demodulator in linear software radio receiver , 2000, 11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2000. Proceedings (Cat. No.00TH8525).

[5]  Floyd M. Gardner,et al.  Interpolation in digital modems. I. Fundamentals , 1993, IEEE Trans. Commun..

[6]  Chia-Chi Huang,et al.  A fully digital noncoherent and coherent GMSK receiver architecture with joint symbol timing error and frequency offset estimation , 2000, IEEE Trans. Veh. Technol..

[7]  Lars Erup,et al.  Interpolation in digital modems. II. Implementation and performance , 1993, IEEE Trans. Commun..

[8]  Friedrich K. Jondral,et al.  Comparison of GMSK and linear approximated GMSK for use in software radio , 1998, 1988 IEEE 5th International Symposium on Spread Spectrum Techniques and Applications - Proceedings. Spread Technology to Africa (Cat. No.98TH8333).

[9]  Marco Chiani,et al.  The first Nyquist criterion applied to coherent receiver design for generalised MSK signals , 1994, IEEE Trans. Commun..

[10]  Pierre A. Laurent,et al.  Exact and Approximate Construction of Digital Phase Modulations by Superposition of Amplitude Modulated Pulses (AMP) , 1986, IEEE Trans. Commun..

[11]  MitolaJ..  Software radio architecture , 1999 .

[12]  Joseph Mitola,et al.  The software radio architecture , 1995, IEEE Commun. Mag..