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In this paper, we investigate efficient scheduling algorithms in OFDMA multihop relaying networks. The scheduling scheme is modeled as a multiple objective programming problem to maximize the overall capacity and the number of satisfied users under the minimum rate constraint per user. An improved priority (IPRI) algorithm is exploited with novel opportunistic function, which relies on capacity gain,...
Relaying transmission is a candidate way to combat wireless channel fading and enlarge the coverage, and efficient radio resource allocation is essential to provide quality-of-service (QoS) for wireless networks. In this paper, an adaptive multiuser radio resource allocation model is proposed for the downlink of OFDM-relay system, which exploits performance gain in both frequency domain and time domain...
Orthogonal frequency division multiplexing (OFDM) is a very promising transmission technology for the beyond 3G (B3G) wireless communication system with orthogonal frequency division multiple access (OFDMA) as its major multiple access technology. And in the multi-cell scenario, the management of inter-cell interference has significant impact on the performance of the wireless network. This paper...
Relayed transmission is a promising technique that helps in attaining broader coverage and in combating the impairment of the wireless channel. Orthogonal frequency division multiplexing (OFDM) technique is promising for the next generation wireless communication system. Therefore, the combination of two techniques named OFDM-relay will be a good candidate technology for future wideband wireless communication...
This paper applies a MIMO transmit preprocessing method proposed by Choi, 2004 into OFDMA systems. Multiuser scheduling in joint frequency and spatial domain is studied. A suboptimal two step scheduling (TSS) algorithm for the system throughput maximization is proposed with reduced complexity. The performance is showed by computer simulation with the value of spatial domain scheduling
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