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Most communications systems require channel estimation for equalization and symbol detection. Currently, this is achieved by using dedicated pilot symbols, which consume a non-negligible part of the throughput and power resources, especially for large dimensional systems. The main objective of this paper is to quantify the rate of reduction of this overhead due to the use of a semi-blind channel estimation...
In most Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) systems, channel estimation is required for equalization and symbol detection. It often exploits the specified pilot symbols consuming not only a large part of the throughput but also significant power resources. This paper quantifies the theoretical maximum power reduction of the transmitted pilots when...
This study deals with the joint channel and carrier frequency offset (CFO) estimation in a Multiple Input Single Output (MISO) communications system. This problem arises in OFDM (Orthogonal Frequency Division Multiplexing) based multi-relay transmission protocols such that the geo-routing one proposed by A. Bader et al in 2012. Indeed, the outstanding performance of this multi-hop relaying scheme...
This paper deals with semi-blind channel estimation Cramèr Rao Bound (CRB) performance of a multiuser Multiple-Input Multiple-Output Orthogonal Frequency-Division Multiplexing (MIMO-OFDM) wireless communication system in the uplink transmission. The first contribution shows that the Carrier Frequency Offset (CFO) impacts advantageously the CRB of the semi-blind channel estimation mainly due to the...
This paper deals with the protection of the exchanged data between a drone and mobile stations against blind interceptions. The developed strategy for a Single-Input Multiple-Output Orthogonal Frequency Division Multiplexing (SIMO-OFDM) communication system consists to prevent the interceptors to achieve a good blind channel estimation while allowing an accurate channel identification by the drone...
In most wireless communication systems, channel estimation is required for equalization and symbol detection. It is currently achieved via dedicated pilot symbols consuming a significant part of the throughput and global resources especially for future systems. This paper shows that semi-blind identification techniques reduces significantly this overhead. By using the Cramer Rao Bound tool, we compare...
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