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In most of the existing compressed sensing based Massive MIMO channel state information acquisition schemes, the huge overhead introduced by reconstruction and measurement of channel cannot afford by power-limited users. Combining channel estimation and feedback together, a Two-dimensional compressed sensing schemes is proposed for Massive MIMO channel state information. Instead of reconstruct the...
Filter bank multi-carrier with offset QAM(FBMC/OQAM) is a multi-carrier modulation technique that can be an alternative to conventional orthogonal frequency division multiplexing(OFDM) with cyclic prefix (CP) in wireless network. FBMC has a higher spectrum efficiency and effective emission power without CP. Because the orthogonality only exists in real domain, the channel estimation in FBMC/OQAM system...
Channel estimation has been becoming the key technique for adaptive underwater acoustic communication systems in tracking fast-fading channels. In this paper, by exploiting the sparse features of underwater acoustic channels for orthogonal frequency division multiplexing (OFDM) systems, we focus on investigating an adaptive channel estimator based on least squared (LS) and recursive least-squares...
In high-rate data orthogonal frequency division multiplex (OFDM) communication systems, many encountered channels trend to have the structure of sparse multipath. The systems over multipath channels usually require that the channel response be known at the receiver and thus channel estimation is required. In this paper, a novel scheme based on the typical least square (LS) and sparse reconstruction...
In some OFDM systems, time domain CP (cyclic prefix) and scattered pilots are used for synchronization and channel estimation. While in novel OFDM broadcasting systems, such as China Digital Terrestrial Multimedia Broadcasting Standard (DTMB), PN sequences rather than cyclic prefixes are inserted as guard interval between N-point IFFT blocks, which are also used as training symbols. This paper proposed...
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