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Photoplethysmography (PPG) is one of the prime non-invasive vascular assessment methodology adopted in modern clinical practice. This paper proposes a modification of delta modulation for effective compression of PPG signal for real time measurements and monitoring applications. Based on the energy content and fluctuations, the PPG signal was windowed and categorized into ‘complex’ or ‘plain’ zones...
An offline ECG compression technique, based on encoding of successive sample differences is proposed. The encoded elements are generated through four stages, viz., down sampling of raw samples, normalization of successive sample differences; data grouping; magnitude and sign encoding; and finally zero element compression. Initially, the compression algorithm is validated with short duration raw ECG...
MANETs can manage without fixed infrastructure and can stay active rapid changes in the network topology. The primary challenge in building a MANET is equipping each device to continuously maintain the information required to appropriately route traffic. Routing with Scalable and robustness performance is one of the key challenges in deploying Mobile Ad-Hoc Networks. In this paper, we deliberate on...
Ad-hoc wireless multi-hop network is communication network that consist of wireless nodes, placed together in an ad hoc manner, with minimal prior planning. All nodes have routing capability and forward data packets for other nodes in multi-hop fashion. Since many applications have QoS (quality of service) requirements such as delay and throughput, it is imperative that the wireless part of the communication...
Multiple wireless network interfaces in a single mobile device exist in order to support their diverse communications and networking needs. This paper proposes a general switching architecture, SwitchR, for managing radio communications for multiple (client) devices utilizing multiple heterogeneous radios per device. SwitchR is deployable incrementally within existing wireless infrastructures, and...
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