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—In this paper we consider physical-layer network coding (PLNC) in OFDM-based two-way relaying systems. Practically , a key impairment for the application of PLNC is the carrier frequency offset (CFO) mismatch between the sources and the relay, which can not be compensated completely in the multiple-access (MA) phase. As this CFO mismatch results in(More)
—This paper discusses retransmission approaches to improve the throughput performance of Hybrid-ARQ (HARQ) schemes in a point-to-point single user 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) uplink system. One goal of communication systems is to achieve a reliable transmission with a throughput performance as close as possible to(More)
— In this paper, two-way relaying networks using physical layer network coding under practical constraints are considered. In the multiple access phase, both users transmit their messages simultaneously on the same resources. At the relay a superposition of both massages is received containing the influence of the channel as well as the impact of Carrier(More)
—Massive Machine Type Communication is seen as one major driver for the research of new physical layer technologies for future communication systems. To handle massive access, the main challenges are avoiding control signaling overhead, low complexity data processing per sensor, supporting of diverse but rather low data rates and a flexible and scalable(More)
—This paper discusses two approaches of reliability-based HARQ, adapting the packet size of a retransmission in a 3GPP Long Term Evolution (LTE) system. We focus on the adaptation of the retransmission size in terms of physical resources by using information 1) of the channel, namely the signal-to-noise ratio (SNR) or 2) reliability information from the(More)
—The performance of physical-layer network coding (PLNC) in two way relay channels (TWRCs) is significantly decreased by impairments like carrier frequency offsets or timing offsets. This mismatch cannot be completely compensated at the receiver side, even if the offsets are known. Multi-carrier systems with Gaussian waveforms for TWRC systems are more(More)
I. ABSTRACT Layered space time (LST) equalization which employs successive interference cancellation (SIC) and frequency domain equalization (FDE) has been proven to be a promising structure for the receiver of single-carrier (SC) systems with MIMO (Multiple-input Multiple-output) schemes. In this paper, the performance of iterative LST in long term(More)