Faster-than-Nyquist Signal Processing Based on Unequal Error Probability for High-Throughput Wireless Communications

Autor: Ji-Won Jung, Chang-Uk Baek
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Orthogonal frequency-division multiplexing
Computer science
Throughput
02 engineering and technology
Data_CODINGANDINFORMATIONTHEORY
lcsh:Technology
lcsh:Chemistry
Interference (communication)
priority
0202 electrical engineering
electronic engineering
information engineering
Nyquist–Shannon sampling theorem
Wireless
General Materials Science
Instrumentation
lcsh:QH301-705.5
OFDM
Fluid Flow and Transfer Processes
Signal processing
OFDM-FTN
business.industry
lcsh:T
unequal error probability
Process Chemistry and Technology
020208 electrical & electronic engineering
General Engineering
020206 networking & telecommunications
lcsh:QC1-999
Computer Science Applications
inter-symbol interference
lcsh:Biology (General)
lcsh:QD1-999
FTN
lcsh:TA1-2040
Nyquist rate
Performance improvement
business
lcsh:Engineering (General). Civil engineering (General)
Algorithm
lcsh:Physics
Zdroj: Applied Sciences
Volume 9
Issue 12
Applied Sciences, Vol 9, Iss 12, p 2413 (2019)
ISSN: 2076-3417
DOI: 10.3390/app9122413
Popis: Faster-than-Nyquist (FTN) signal processing, which transmits signals faster than the Nyquist rate, is a representative method for improving throughput efficiency sacrificed performance degradation due to inter-symbol interference. To overcome this problem, this paper proposed FTN signal processing based on the unequal error probability to improve performance. The unequal error probability method divides encoded bits into groups according to priority, and FTN interference rates are differently applied to each group. A lower FTN interference ratio is allocated to the group to which high-priority encoded bits belong and a higher FTN interference ratio is allocated to the group to which low-priority encoded bits belong, thus performance improvement can be obtained compared to the conventional FTN method, with the same interference ratio. In addition, we applied the proposed FTN signal processing, based on the unequal error probability method, to the OFDM (orthogonal frequency division multiplexing) system in multipath channel environments. In the simulations, the performance of the proposed method was better than that of the conventional FTN method by about 0.2 dB to 0.3 dB, with an interference ratio of 20%, 30%, and 40%. In addition, in multipath channels, we confirmed that by applying the proposed unequal error probability, the OFDM-FTN method improves performance to a larger extent than the conventional OFDM-FTN method.
Databáze: OpenAIRE
Externí odkaz: