In this paper, we consider uplink channel sounding in time division duplex (TDD) orthogonal frequency division multiplexing (OFDM)-based cellular systems. The channel information provided by uplink sounding may be necessary to exploit closed loop transmission techniques in TDD-OFDM systems. However, conventional sounding schemes may suffer from large sounding overhead, significantly restricting...

In this paper, we consider a new channel sounding scheme for opportunistic scheduling with the use of reduced channel information in the uplink of orthogonal frequency division multiplexing (OFDM)-based wireless systems. To reduce signaling overhead for the sounding, we propose a two step channel sounding process considering the correlation characteristic in the time and frequency domain; calle...

Abstract Marine dredging is an excavation activity carried out worldwide. Dredging a critical component of most major infrastructure developments the lakes. This research work was conducted, using two epoch data (year 2016 and year 2022), to investigate changes in morphometry Lake Manzala. Data acquisition done depth sounding with echo sounder GPS, further processing ArcGIS 10.7.1 software. Res...