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One of the main potentials for improved bulk reading speed in UHF radio frequency identification (RFID) systems is collision recovery, i.e., the recovery of signal collisions on the channel caused by unwanted simultaneous replies of the RFID tags. State-of-the-art collision recovery methods typically rely on quasi perfect channel state information (CSI), which is difficult to achieve using existing...
Radio Frequency Identification (RFID) systems with dense tag populations face the problem of tag collisions, i.e. simultaneous replies of multiple transponders in a single slot. State-of-the-art RFID readers can use two methods for resolving this collision problem. The first method bases on Dynamic Frame Slotted ALOHA (DFSA) for optimizing the frame length, which results in a reduced number of collisions...
In this paper, we propose and analyse the performance of the full-duplex multiple-input multiple-output singular value decomposition (FD-MIMO-SVD) based relay with self-interference-cancellation (SIC). The effects of channel estimation errors for the source-to-relay and self-interference channels are considered. The performance of the system is investigated in the presence of additive white Gaussian...
Multiple Input Multiple Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM), MIMO-OFDM, is considered as a spectrally efficient approach to achieve high throughput communications. This paper investigates the performance of MIMO-OFDM system using the proposed NLMS adaptive equalizer and the developed Singular Value Decomposition (SVD) technique in estimating the channel. The performances...
Channel estimation in orthogonal frequency division multiplexing (OFDM) systems is required for coherent demodulation. This paper deals with channel estimation in the OFDM based LTE system. In particular, two pilot-aided techniques are presented: the low-pass filter based estimator (LPFE), and the robust minimum mean square error estimator (MMSE). These techniques are characterized by their low complexity...
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