상세정보
학술지
Cross-Relation-Based Frequency-Domain Blind Channel Estimation with Multiple Antennas in Orthogonal Frequency Division Multiplexing Systems
- 발행일
- 201311
- 출처
- IET Communications, v.7 no.16, pp.1753-1768
- ISSN
- 1751-8628
- 출판사
- IET
- 협약과제
- 13PR1200, 모바일 빅뱅시대의 스펙트럼 슈퍼하이웨이 기술개발, 최재익
- 초록
- Frequency domain blind channel estimation methods for orthogonal frequency division multiplexing (OFDM) systems with multiple antennas are proposed, in which the cross relation between the channel gains and a single snapshot of the received signal on each subcarrier is utilised. Necessary and sufficient conditions for the identifiability of a single-input multiple-output OFDM channel estimator are derived and, furthermore, using a first-order perturbation analysis, the approximation of meansquared- error (MSE) is analytically obtained, which shows that the proposed estimator is approximately unbiased at high signal-to-noise ratio. The proposed estimator exhibits lower MSEs than those of both the existing subspace-based and deterministic blind channel estimators and is less sensitive to the estimation error of the number of multipaths. Finally, the extension of the proposed channel estimation to multiple-input-multiple-output OFDM is presented. © The Institution of Engineering and Technology 2013.
- KSP 제안 키워드
- Blind channel estimation, Channel Estimator, Channel estimation(CE), High signal-to-noise ratio, Multiple input multiple output(MIMO), Necessary and sufficient conditions, Orthogonal frequency division Multiplexing(OFDM), Signal noise ratio(SNR), Single snapshot, channel estimation methods, estimation error