Differential network coding in wireless networks Telsiz aǧlarda farksal aǧ kodlamasi

Date

2009-10-29

Author

Özdemir, Özgür
Yılmaz, Ali Özgür

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

229
views

0
downloads

In this paper a three-terminal communication scenario where two users exchange information by employing differential binary modulation and network coding via a relay is considered. The transmission is divided into three slots in time where the first and second slots are allocated to the transmission of differential encoded data of the users. After demodulation, the relay broadcasts the bit-wise XOR-ed and differential encoded packet to the users in the third slot. The optimum detector and a simplified decision algorithm are derived based on the maximum likelihood rule. The numerical results for Rayleigh fading show that both of the proposed algorithms provide full diversity order. The simulations also demonstrate that the proposed differential network coded transmission not only offers a sum-rate gain of up to 4/3 compared to classical bi-directional relaying with four communication slots but also provides better BER performance as the signal to noise ratio increases.

Subject Keywords

Network coding , Performance gain, Rayleigh channels, Detectors, Broadcasting, Demodulation , Modulation coding , Maximum likelihood detection, Relays , Wireless networks

URI

https://hdl.handle.net/11511/57335

DOI

https://doi.org/10.1109/siu.2009.5136367

Collections

Department of Electrical and Electronics Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Performance Comparisons of Relaying Schemes in Bi-directional Demodulate-and-Forward Channels ÖZDEMİR, ÖZGÜR; Yılmaz, Ali Özgür; Aktas, Emre (2012-04-04) Bi-directional relaying (BDR) in which two users wish to exchange independent information in presence of a relay is one of the fundamental wireless network coding applications that attracted intense interests recently. In this paper, maximum likelihood (ML), cooperative maximal ratio combining (CMRC) and soft information relaying (SIR) schemes proposed to combat error propagation in wireless relay systems are applied to the BDR scenario with demodulate-and-forward protocol, which decreases system complexity...
Joint network-channel coding with repeat accumulate codes for wireless relay networks Röleli telsiz aǧlarda tekrarli biriktir kodlar ile bütünleşik aǧ-kanal kodlamasi Özdemir, Özgür; Yılmaz, Ali Özgür (2009-10-29) This paper presents two different repetition based joint network-channel coding schemes for a three-terminal communication system where two-users want to exchange information via a relay. The transmission is divided into three slots in time where the first and second slots are allocated to the RA (Repeat Accumulate) encoded data of the users. In the first scheme we propose, the relay decodes the received signals and transmits a bit-wise XOR-ed packet using RA coding in the third slot. In the second scheme, ...
Relay Selection for Efficient HARQ-IR Protocols in Relay-Assisted Multisource Multicast Networks Quoc-Tuan Vien, Quoc-Tuan Vien; Nguyen, Huan X.; Shah, Purav; Ever, Enver; Duc To, Duc To (2014-05-21) This paper investigates relay selection for reliable data transmission in relay-assisted multisource multicast networks (RMMNs) where multiple source nodes distribute information to a set of destination nodes with the assistance of multiple relay nodes. Hybrid automatic repeat request with incremental redundancy (HARQ-IR) is used and supported by either a physical-layer network coding (PNC) or an analog network coding (ANC) technique employed at the relays. By deriving efficiency metrics of the HARQ-IR prot...
Diversity Analysis of Hierarchical Modulation in Wireless Relay Networks Yalcyn, Ahmet Zahid; Yüksel Turgut, Ayşe Melda (2014-07-01) In communication systems, hierarchical modulation is used to increase system robustness and to send different information flows simultaneously. However, when used in cooperative communication systems, hierarchical modulation is prone to error propagation, which is the most important problem that prevents the achievement of full diversity gains. Depending on the signal-to-noise ratio between the source and the relay, threshold digital relaying can be used to mitigate error propagation. Mitigating error propa...
MULTI-GROUP MULTICAST BEAMFORMING FOR SIMULTANEOUS WIRELESS INFORMATION AND POWER TRANSFER Demir, Özlem Tuğfe; Tuncer, Temel Engin (2015-09-04) In this paper, simultaneous wireless information and power transfer (SWIPT) concept is introduced for multi group multicast beamforming. Each user has a single antenna and a power splitter which divides the radio frequency (RF) signal into two for both information decoding and energy harvesting. The aim is to minimize the total transmission power at the base station while satisfying both signal-to-interference-plus- noise-ratio (SINR) and harvested power constraints at each user. Unlike unicast and certain ...

Citation Formats

Ö. Özdemir and A. Ö. Yılmaz, “Differential network coding in wireless networks Telsiz aǧlarda farksal aǧ kodlamasi,” 2009, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/57335.