Interference-Managed Local Service Insertion for 5G Broadcast

Abstract

<p>Local content insertion enabled single frequency networks (SFN) for TV broadcast is a topic of considerable research interest. The SFN broadcast system is not ideally suited for localized content, but it offers enormous spatial diversity and power gain advantages. Orthogonal Frequency Division Multiple Access (OFDMA) allows reserving a fraction of available subcarriers for broadcasting local content. However, a user in the transition region from one local service area (LSA) to another experiences high co-channel interference (CCI). This work explores the possibility of using a `buffer zone' based on universal frequency reuse schemes. In such systems, the power allocation to each content is varied to reduce the CCI-dominated region in the LSA boundary. Simulation results show that depending on the threshold signal-to-interference plus noise (SINR) ratio selected, the proposed buffer architectures increase the percentage of users served by the SFN compared to the scheme where such a buffer is absent. Moreover, the proposed method is spectrally efficient compared to an orthogonal allocation of local content across the LSAs.</p>

A review/survey paper on Nanobots in Medical Applications for kidney curing in humans

“…Another issue with x-rays is that it is extremely challenging to produce a narrow beam, and even if one did, utilising it to scan an area in great detail would need a lengthy exposure. As a result, x-rays are only suitable for broad diagnosis, for which several of the methods mentioned above are far more appropriate [10].…”