SAIC receiver algorithms for VAMOS downlink transmission

Voice services over Adaptive Multiuser channel in One Slot (VAMOS) performance in the presence of GMSK interferer is presented. Widely-Linear (WL) MMSE filtering is used to cancel the co-channel GMSK interferer while performing α-QPSK detection. In this paper, two ways of estimating the Sub Channel Power Imbalance Ratio (SCPIR) are discussed. Due to the colouration of the resultant impairment after filtering, WL metric is proposed which incorporates error covariance between I/Q components in the metric computation. WL RSSE is used as the equalizer. Simulation results using the proposed receiver architecture show significant performance important over conventional VAMOS receivers.

[1]  Robert Schober,et al.  A single antenna interference cancellation algorithm for increased gsm capacity , 2006, IEEE Transactions on Wireless Communications.

[2]  Kiran Kuchi,et al.  Interference cancellation enhancement through generalized widely linear equalization in QAM systems , 2009, IEEE Transactions on Wireless Communications.

[3]  Gottfried Ungerboeck,et al.  Channel coding with multilevel/phase signals , 1982, IEEE Trans. Inf. Theory.

[4]  R. Ramesh,et al.  Maximum SNR prefiltering for MIMO systems , 2005, IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005..

[5]  Rajaram Ramesh,et al.  Maximum likelihood sequence estimation in the presence of constant envelope interference [cellular radio networks] , 2003, 2003 IEEE 58th Vehicular Technology Conference. VTC 2003-Fall (IEEE Cat. No.03CH37484).

[6]  Dirk T. M. Slock,et al.  Cochannel interference cancellation within the current GSM standard , 1998, ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384).

[7]  Ivica Kostanic,et al.  Single antenna interference cancellation (SAIC) for GSM networks , 2003, 2003 IEEE 58th Vehicular Technology Conference. VTC 2003-Fall (IEEE Cat. No.03CH37484).

[8]  Peter A. Hoeher,et al.  Single Antenna Interference Cancellation (SAIC) for Cellular TDMA Networks by Means of Decoupled Linear Filtering/Nonlinear Detection , 2006, 2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications.

[9]  Pascal Chevalier,et al.  New insights into optimal widely linear array receivers for the demodulation of BPSK, MSK, and GMSK signals corrupted by noncircular interferences-application to SAIC , 2006, IEEE Transactions on Signal Processing.

[10]  Robert Schober,et al.  Efficient receivers for GSM MUROS downlink transmission , 2009, 2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications.

[11]  Shahid U. H. Qureshi,et al.  Reduced-state sequence estimation with set partitioning and decision feedback , 1988, IEEE Trans. Commun..

[12]  R. Schober,et al.  A single antenna interference cancellation algorithm for GSM , 2005, 2005 IEEE 61st Vehicular Technology Conference.

[13]  Naofal Al-Dhahir,et al.  FIR channel-shortening equalizers for MIMO ISI channels , 2001, IEEE Trans. Commun..

[14]  Peter A. Hoeher,et al.  Single-antenna co-channel interference cancellation for TDMA cellular radio systems , 2005, IEEE Wireless Communications.

[15]  Kiran Kuchi,et al.  Performance evaluation for widely linear demodulation of PAM/QAM signals in the presence of rayleigh fading and co-channel interference , 2009, IEEE Transactions on Communications.

[16]  Waldo Kleynhans,et al.  Single antenna interference cancellation for synchronised GSM networks using a widely linear receiver , 2007, IET Commun..

[17]  Pascal Chevalier,et al.  Widely linear estimation with complex data , 1995, IEEE Trans. Signal Process..