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With the congestion of the sub-6 GHz spectrum, the interest in massive multiple-input multiple-output (MIMO) systems operating on millimeter wave spectrum grows. In order to reduce the power… (More)
Channel estimation is a crucial problem for massive multiple input multiple output (MIMO) systems to achieve the expected benefits in terms of spectrum and energy efficiencies. However, a… (More)
In this letter, we present a sequential closed-form semiblind receiver for a one-way multihop amplify-and-forward relaying system. Assuming Khatri–Rao space-time coding at each relay, it is shown… (More)
In this letter, we present two closed-form semiblind receivers for a two-way amplify-and-forward relaying system. The proposed receivers jointly estimate the symbol and channel matrices involved in… (More)
Spread spectrum multiple access is widely used by radionavigation satellite services to separate an increasing number of systems, satellites, and signals within a common frequency band, but multiple… (More)