Multilevel Coding Schemes for Compute-and-Forward With Flexible Decoding

We consider the design of coding schemes for the wireless two-way relaying channel when there is no channel state information at the transmitter. In the spirit of the compute-and-forward paradigm, we present a multilevel coding scheme that permits reliable computation (or, decoding) of a class of fu...

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Vydané v:IEEE transactions on information theory Ročník 59; číslo 11; s. 7613 - 7631
Hlavní autori: Hern, Brett, Narayanan, Krishna R.
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: New York, NY IEEE 01.11.2013
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Predmet:
Applied sciences
Coding theory
Coding, codes
Communication channels
Compute-and-forward (CF)
decode-and-forward
Decoding
Detection, estimation, filtering, equalization, prediction
Exact sciences and technology
Information theory
Information, signal and communications theory
Lattices
Linear code
Mathematical functions
multilevel coding
network coding
Relays
Reliability
Signal and communications theory
Signal, noise
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
Transmitters
two-way relaying
Wireless networks
Relaying
Packet switching
Parameter estimation
Relay
Two channel system
Wireless telecommunication
Transmission protocol
Transmitter
Decoding
multilevel coding
Flexibility
decode-and-forward
Channel estimation
Modulation
Network coding
Numerical simulation
Routing protocols
two-way relaying
Multilevel system
Compute-and-forward (CF)
ISSN:0018-9448, 1557-9654
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Popis
Shrnutí:We consider the design of coding schemes for the wireless two-way relaying channel when there is no channel state information at the transmitter. In the spirit of the compute-and-forward paradigm, we present a multilevel coding scheme that permits reliable computation (or, decoding) of a class of functions at the relay. The function to be computed (or decoded) is then chosen depending on the channel realization. We define such a class of functions which can be decoded at the relay using the proposed coding scheme and derive rates that are universally achievable over a set of channel gains when this class of functions is used at the relay. We develop our framework with general modulation formats in mind, but numerical results are presented for the case where each node transmits using 4-ary and 8-ary modulation schemes. Numerical results demonstrate that the flexibility afforded by our proposed scheme results in substantially higher rates than those achievable by always using a fixed function or considering only linear functions over higher order fields.
Bibliografia:SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 14
ISSN:0018-9448
1557-9654
DOI:10.1109/TIT.2013.2271771