tailieunhanh - Báo cáo hóa học: " Design and Experimental Validation of MIMO Multiuser Detection for Downlink Packet Data"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Design and Experimental Validation of MIMO Multiuser Detection for Downlink Packet Data | EURASIP Journal on Applied Signal Processing 2005 11 1769-1777 2005 Hindawi Publishing Corporation Design and Experimental Validation of MIMO Multiuser Detection for Downlink Packet Data Dragan Samardzija Bell Laboratories Lucent Technologies Holmdel NJ 07733 USA Email dragan@ Angel Lozano Bell Laboratories Lucent Technologies Holmdel NJ 07733 USA Email aloz@ Constantinos B. Papadias Bell Laboratories Lucent Technologies Holmdel NJ 07733 USA Email papadias@ Received 8 March 2004 Revised 29 October 2004 In single-user MIMO communication the first-order throughput scaling is determined by the smallest of the number of transmit and receive antennas. This typically renders terminals the constraining bottleneck. In a multiuser downlink this bottleneck can be bypassed by having the base station communicate with multiple terminals simultaneously in which case the receive antennas at those terminals are effectively pooled in terms of the capacity scaling. This however requires that the base have instantaneous channel information. Without such information the structure and statistics of the channel can be exploited to form multiple simultaneous beams towards the various users but these beams are in general mutually interfering. This paper proposes the use of multiuser detection to discriminate the signals conveyed over interfering beams. This approach is formulated and experimentally evaluated on an HSDPA MIMO testbed that involves a commercial base station multiantenna terminals and custom ASICs. Keywords and phrases MIMO HSDPA UMTS experimental validation. 1. INTRODUCTION MIMO multiple-input multiple-output schemes utilizing multiple transmit and receive antennas are posed to be a major ingredient in the evolutionary process of wireless communication. Widely recognized features associated with MIMO are spatial diversity signal enhancements interference mitigation and spatial multiplexing. The latter in particular has driven a lot of the .

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