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Opportunistic routing has gained much attention in recent years as a means of leveraging the broadcast nature of wireless medium. Most of the previous studies focused only on improving throughput, assuming that Best Effort traffic which is delay insensitive is delivered through opportunistic routing. However, when the delay sensitive traffic is involved, it is necessary to consider both the opportunistic...
Packet-level erasure correction is considered for downstream packets each of which is delivered from a base station to an individual receiver (i.e., user) over a lossy shared wireless network where only a very limited upstream feedback is provided. Note that, while the destination of each packet is a single user, each packet can be overheard by all users in the shared network. With exploiting this...
This study investigates how frequency offsets of multitone jamming affect the fast frequency-hopped binary frequency shift keying (FFH/BFSK) product-combining receiver (PCR) under additive white Gaussian noise (AWGN). We demonstrate the average bit-error-rate (BER) expressions of the FFH/BFSK PCR and the average BER expressions of an FFH/BFSK spread-spectrum (SS) communication system with frequency...
This paper is concerned with the performance enhancement of IDMA systems using optimum power allocation algorithm. Based on the optimized power allocation technique we compare the performance of coded and uncoded IDMA system with random interleaver & tree based interleaver. The simulation results demonstrate the superior performance of tree based interleaver in comparison to random interleavers.
The effect of sample-timing error on the bit-error-rate (BER) performance of the interleave-division multiple access (IDMA) systems are studied in this paper. We construct an asynchronous IDMA system model to investigate the effect of sample-timing error caused by the asynchronous transmission from different user ends (UEs) on the BER performance. The theoretic analysis shows that sample-timing error...
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