Optimized constellations for two-way wireless relaying with physical network coding
Citations
2 citations
Cites background or methods from "Optimized constellations for two-wa..."
...This paper dealt with the carrier frequency offset problem in OFDM based PNC with QPSK modulation....
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...This is because in the former case Δθ applies to all OFDM symbols and the adverse effect of a higher Δθ from 0 to π2 arises [10], whereas in the latter case, the OFDM symbols in a packet transmission experience different phase offsets regardless of Δθ and hence there is no Δθ that is particularly harmful....
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...For PNC with QPSK modulation, [10] proposed a remedy using different network coding schemes for different relative phase offsets at relay R....
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...In this paper, we do not only consider effective signal detection and channel decoding schemes in channel-coded PNC, but also study other approaches to further reduce the adverse effect of CFO: One attempt is to seek an optimal CFO compensation at relay R for QPSK modulation (although an optimal compensation was pointed out in [6] for BPSK modulation), and the other attempt is to study the effect of pilot insertion at the transmitters A and B. Channel estimation is also central to PNC. [8], [16] studied joint channel estimation and decoding for single-carrier PNC, and [3], [9] dealt with the channel and CFO estimation in OFDM based PNC....
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...Both will cause performance loss in PNC [7], especially for high-order modulations including QPSK [10]....
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2 citations
2 citations
Cites background or result from "Optimized constellations for two-wa..."
...In order to achieve a successful network decoding at the sources, any arbitrary C(·) has to fulfill the following requirement [KAPT09b]...
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...This corresponds to the observations in [KAPT09b], which shows that some incoherent channel conditions can be catastrophic when directly mapping the receive signal to the XOR-based network coded message with QPSK, whereas the impact on BPSK is less dramatic....
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2 citations
2 citations
Cites methods from "Optimized constellations for two-wa..."
...The design of modulation suited for TWRC with PLNC can be BPSK or QPSK [6], and an unconventional 5-ary modulation which is optimized according to the channel condition [7]....
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References
45,034 citations
"Optimized constellations for two-wa..." refers background in this paper
...Since Shannon firstly considered a two–way channel in [10], some theoretical investigations on the bidirectional relaying have emerged so far [ 11 ]....
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8,533 citations
"Optimized constellations for two-wa..." refers background in this paper
...W IRELESS network coding has recently received a lot of attention in research community, although the concept of network coding has been around for almost a decade [2]....
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4,564 citations
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1,728 citations
"Optimized constellations for two-wa..." refers background in this paper
...In [6, 18 ], the amplify–and–forward (AF) bidirectional relaying is introduced, where the terminal nodes simultaneously transmit to the relaying node, and subsequently the relay broadcasts the received signal after amplification....
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