The Impact of Link Adaptation in Narrowband Frequency-selective Wireless Ad-hoc Networks - Part I: The Physical Perspective
نویسندگان
چکیده
In this paper, together with its Part II, the impact of relaying and adaptive modulation and coding (AMC) on data throughput in narrowband wireless multi-hop networks is investigated. This part focuses on the physical layer of a single-carrier narrowband time division multiple access (TDMA) transmission in the very high frequency (VHF) band. The transmission chain is designed for a narrowband, long range application with high order quadrature amplitude modulation (QAM) in combination with low-density parity-check (LDPC) codes. The packet error rate (PER) performance is determined for a digital audio broadcast (DAB) VHF channel model. Based on the PER curves for the DAB channel, signal-to-noise ratio (SNR)-thresholds are defined which are required for adaptive selection of different modulation and coding schemes (MCS). These results are further utilized in a system level simulation which studies the impact of relaying and link adaptation in a multi-hop network which is subject of Part II of this paper.
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