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In this paper, we propose a simple header detection technique to identify multiple device connections for finite length wireless Internet-of-things (IoT) networks. The Hadamard codes are selected to guarantee low computational complexity, while finite length, defined as finite number of time-slots, is considered to fulfill the requirement of low network latency required by the fifth generation (5G)...
For reducing the influence of background noise and inhibiting synchronization slip in optical wireless communication, framed-differential on-off keying (Framed-DOOK) modulation scheme has been proposed. In this paper, the Framed-DOOK is combined with error correcting codes. The bit error rates of Framed-DOOK system using both standard turbo code and regular low density parity check (LDPC) code are...
In this paper, a design of two-layered pseudonoise (PN) code for optical-wireless code-shift keying (CSK) is considered. One of the important issues encountered in optical-wireless CSK systems is to design a PN code for enhancing code division multiple access (CDMA) capability and a ratio N/L between the number of codes (N) and the PN code length (L). In this paper, a CSK system using two-layered...
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