Protocol-aided channel equalization in wireless ATM

We study the equalization problem in time division multiple access wireless asynchronous transfer mode (ATM) systems. Aiming at minimizing the overhead associated with equalization, we propose a protocol-aided channel equalization (PACE) approach for wireless ATM. Specifically, the medium access control (MAC) and data link control (DLC) protocols are exploited to provide known ATM cell headers to the receiver at the base station. A blind channel estimation-decision feedback equalizer (BCE-DFE) algorithm is developed for uplink data transmissions. There are two advantages of the BCE-DFE algorithm: the elimination of training symbols for uplink data bursts and the removal of channel estimation error propagation suffered by conventional block equalization schemes. Simulation results show the BCE-DFE has a robust performance for wireless ATM uplink data transmissions over fast time-varying channels.

[1]  Donald C. Cox,et al.  Blind equalization for short burst communications over frequency selective wireless channels , 1997, 1997 IEEE 47th Vehicular Technology Conference. Technology in Motion.

[2]  L. Tong,et al.  Multichannel blind identification: from subspace to maximum likelihood methods , 1998, Proc. IEEE.

[3]  Zhao Liu,et al.  Distributed-queueing request update multiple access (DQRUMA) for wireless packet (ATM) networks , 1995, Proceedings IEEE International Conference on Communications ICC '95.

[4]  D. Devasirvatham.  Time delay spread and signal level measurements of 850 MHz radio waves in building environments , 1986 .

[5]  Reinaldo A. Valenzuela,et al.  A wireless broadband ad-hoc ATM local-area network , 1995, Wirel. Networks.

[6]  Sirikiat Lek Ariyavisitakul,et al.  Reduced-Complexity Equalization Techniques for Broadband Wireless Channels , 1997, IEEE J. Sel. Areas Commun..

[7]  A. Reibman,et al.  Forward error control for MPEG-2 video transport in a wireless ATM LAN , 1996, Proceedings of 3rd IEEE International Conference on Image Processing.

[8]  Frank M. Hsu.  Data Directed Estimation Techniques for Single-Tone HF Modems , 1985, MILCOM 1985 - IEEE Military Communications Conference.

[9]  D. Petras.  Medium access control protocol for wireless, transparent ATM access , 1995, IEEE Wireless Communication System Symposium.

[10]  Dipankar Raychaudhuri,et al.  WATMnet: a prototype wireless ATM system for multimedia personal communication , 1996, Proceedings of ICC/SUPERCOMM '96 - International Conference on Communications.

[11]  C. C. Watterson,et al.  Experimental Confirmation of an HF Channel Model , 1970 .

[12]  Andy Hopper,et al.  The ORL Radio ATM System, Architecture and Implementation , 1997 .

[13]  Cesar A. Johnston,et al.  Design and performance of radio access protocols in WATMnet, a prototype wireless ATM network , 1997, Proceedings of ICUPC 97 - 6th International Conference on Universal Personal Communications.

[14]  R. Steele,et al.  Mobile Radio Communications , 1999 .

[15]  Jean C. Walrand,et al.  High-performance communication networks , 1999 .

[16]  Frédéric Bauchot.  MASCARA, a MAC protocol for wireless ATM , 1996 .

[17]  Boon Chong Ng,et al.  A structured channel estimator for maximum-likelihood sequence detection , 1997, IEEE Communications Letters.

[18]  Ghassan Kawas Kaleh.  Channel Equalization for Block Transmission Systems , 1995, IEEE J. Sel. Areas Commun..

[19]  John M. Cioffi,et al.  MMSE decision-feedback equalizers: finite-length results , 1995, IEEE Trans. Inf. Theory.

[20]  Ender Ayanoglu,et al.  Wireless ATM: limits, challenges, and proposals , 1996, IEEE Wirel. Commun..

[21]  D. Raychaudhuri,et al.  ATM-based transport architecture for multiservices wireless personal communication networks , 1994, IEEE J. Sel. Areas Commun..

[22]  Mahmoud Naghshineh,et al.  An Architecture and Methodology for Mobile-Executed Cell Hand-off in Wireless ATM Networks , 1994, Mobile Communications.

[23]  S. Mahmoud,et al.  Channel characterization for indoor wireless communications at 21.6 GHz and 37.2 GHz , 1993, Proceedings of 2nd IEEE International Conference on Universal Personal Communications.

[24]  Lang Tong,et al.  Blind channel estimation using the second-order statistics: algorithms , 1997, IEEE Trans. Signal Process..

[25]  S. N. Crozier,et al.  Reduced complexity short-block data detection techniques for fading time-dispersive channels , 1992 .

[26]  Ralph Hasholzner,et al.  Multiple Access and Equalization Issues for 156 Mb/s ATM Radio in the Local Loop , 1997 .

[27]  T. Kailath,et al.  A least-squares approach to blind channel identification , 1995, IEEE Trans. Signal Process..