Capacity and quality enhancement for ANSI-136 downlink using interference cancellation and beamforming

In this paper, we investigate the capacity and quality gains for the downlink of an ANSI-136 system when handsets equipped with co-channel interference cancellation are deployed together with base stations employing array antennas. We find that the two capacity-enhancing techniques complement each other very well. Cell sectorization and beamforming increase interferer strength disparity which is exploited by an interference cancelling receiver Compared to a 7/21 re-use system with conventional receivers, the capacity can be almost tripled by means of four fixed beams per sector and two-user joint detection receivers for a slowly-varying flat fading environment.

[1]  Alexandra Duel-Hallen,et al.  Delayed decision-feedback sequence estimation , 1989, IEEE Trans. Commun..

[2]  Z.-C. Honkasalo,et al.  TDMA cellular network application of an interference cancellation technique , 1995, 1995 IEEE 45th Vehicular Technology Conference. Countdown to the Wireless Twenty-First Century.

[3]  Karl J. Molnar,et al.  Adaptive antennas for GSM and TDMA systems , 1999, IEEE Wirel. Commun..

[4]  B. Hagerman.  Downlink relative co-channel interference powers in cellular radio systems , 1995, 1995 IEEE 45th Vehicular Technology Conference. Countdown to the Wireless Twenty-First Century.

[5]  J.H. Winters,et al.  Optimum combining in digital mobile radio with cochannel interference , 1984, IEEE Transactions on Vehicular Technology.

[6]  Khaled Ben Letaief,et al.  Adaptive equalization and interference cancellation for wireless communication systems , 1999, IEEE Trans. Commun..

[7]  Hiroshi Suzuki,et al.  Interference canceling equalizer (ICE) for mobile radio communications , 1994, Proceedings of ICC/SUPERCOMM'94 - 1994 International Conference on Communications.

[8]  Riccardo Raheli,et al.  Per-Survivor Processing: a general approach to MLSE in uncertain environments , 1995, IEEE Trans. Commun..

[9]  K. Fukawa,et al.  Interference cancelling equalizer (ICE) for mobile radio communication , 1997 .

[10]  Co-channel interference cancelling receiver for TDMA mobile systems , 1995, Proceedings IEEE International Conference on Communications ICC '95.

[11]  B. Hagerman,et al.  Adaptive antennas in IS-136 systems , 1998, VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151).