کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
453913 695068 2006 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Multiuser frequency-time domain radio resource allocation in downlink OFDM systems: Capacity analysis and scheduling methods
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر شبکه های کامپیوتری و ارتباطات
پیش نمایش صفحه اول مقاله
Multiuser frequency-time domain radio resource allocation in downlink OFDM systems: Capacity analysis and scheduling methods
چکیده انگلیسی

In this paper, we propose an adaptive multiuser frequency-time domain radio resource allocation model for the downlink OFDM systems, which efficiently exploits the time diversity, frequency diversity as well as multiuser diversity in the time, frequency and user domain, respectively. Next we give an in-depth capacity analysis of the proposed frequency-time domain radio resource allocation which achieves much higher capacity (spectral efficiency) than the conventional frequency domain resource allocation. Then according to the allocation algorithm’s computational complexity, two different-complexity adaptive resource allocation algorithms—algorithm A and algorithm B—are proposed which adopt a two-step allocation method to reduce the scheduling complexity and meanwhile improve the scheduling performance. Simulation results show that though the performance of algorithm A and B is slightly different, both of the proposed algorithms yield much higher spectral efficiency and much lower outage probability than conventional OFDM-TDMA scheme or random allocation without any scheduling policy.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computers & Electrical Engineering - Volume 32, Issues 1–3, January–May 2006, Pages 118–134
نویسندگان
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