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From a conceptual perspective, 5G technology promises to deliver low latency,high data rate and more reliable connections for the next generations ofcommunication systems. To face these demands, modulation schemes based onOrthogonal Frequency Domain Multiplexing (OFDM) can accommodate theserequirements for wireless systems. On the other hand, several hybrid OFDM-basedsystems such as the Time-Interleaved Block Windowed Burst Orthogonal FrequencyDivision Multiplexing (TIBWB-OFDM) are capable of achieving even betterspectral confinement and power efficiency. This paper addresses to theimplementation of the TIBWB-OFDM system in a more realistic and practicalwireless link scenarios by addressing the challenges of proper and reliablechannel estimation and frame synchronization. We propose to incorporate apreamble formed by optimum correlation training sequences, such as theZadoff-Chu (ZC) sequences. The added ZC preamble sequence is used to jointlyestimate the frame beginning, through signal correlation strategies and athreshold decision device, and acquire the channel state information (CSI), byemploying estimators based on the preamble sequence and the transmitted data.The employed receiver estimators show that it is possible to detect theTIBWB-OFDM frame beginning and provide a close BER performance comparatively tothe one where the perfect channel is known.

Joint Channel Estimation and Synchronization Techniques for Time Interleaved Block Windowed Burst OFDM