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학술대회 Pilot Structure for high Data Rate in OFDM/OQAM-IOTA System
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윤태웅, 임세빈, 황성현, 최형진
Vehicular Technology Conference (VTC) 2008 (Fall), pp.1-5
08MR1100, 스펙트럼 사용효율 개선을 위한 Cognitive radio 기술 개발, 송명선
In this paper, we introduce a novel pilot structure for OFDM/OQAM system which has high spectral efficiency by isotropic orthogonal transform algorithm (IOTA) function. In contrast with classical OFDM/QAM transmission scheme, the OFDM/OQAM-IOTA system requires a specific pilot structure for channel estimation because side-lobe components of the IOTA function cause an intrinsic interference. In case of conventional pilot structure, successive signal cancellation and null insertion schemes are considered for minimizing the channel estimation error. These schemes, however, reduce overall data transmission rate, especially for frequent pilot transmission, and it results in decreased throughput. For improving the data rate, we propose an additional data transmission scheme based on signal cancellation and an efficient 2-dimensional pilot block. Analysis and simulation results verify that the proposed pilot structure exhibit not only higher data rate but also more reliable channel estimation performance than the conventional pilot structure. ©2008 IEEE.
KSP 제안 키워드
Analysis and simulation, Channel estimation(CE), Data transmission rate, High data rate, High spectral efficiency, Orthogonal Transform, Spectral efficiency(SE), Transmission scheme, channel estimation errors(CSEs), estimation performance, signal cancellation