Data Rate Loss Due to Quantized SNR Estimates in Adaptive Bit Loading Algorithms

Adaptive bit loading enables OFDM systems to optimize the transmit power levels and/or transmission data rates. These algorithms require the knowledge of ideal signal to noise ratio (SNR) for each data subcarrier at both the transmitter and the receiver. However, in practice the channel SNR can only...

Celý popis

Uložené v:
Podrobná bibliografia
Vydané v:Wireless personal communications Ročník 69; číslo 4; s. 1773 - 1781
Hlavný autor: Kurt, Güneş Karabulut
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Boston Springer US 01.04.2013
Springer
Predmet:
Access methods and protocols, osi model
Adaptive algorithms
Algorithms
Applied sciences
Channels
Communication systems
Communications Engineering
Computer Communication Networks
Computer science; control theory; systems
Computer systems and distributed systems. User interface
Data subcarriers
Engineering
Estimates
Exact sciences and technology
Mathematical analysis
Networks
Quantization
Signal,Image and Speech Processing
Software
Telecommunications
Telecommunications and information theory
Teleprocessing networks. Isdn
Quantization
Signal to noise ratio (SNR) estimation
Adaptive bit loading
Orthogonal frequency division multiplexing (OFDM)
Powerline communication systems
Adaptive algorithm
Transmission channel
Information rate
Data transmission
Subcarrier
Adaptive method
Transceiver
Electrical network
Information source
Signal quantization
Orthogonal frequency division multiplexing
Transmission rate
Transmission speed
Signal to noise ratio
ISSN:0929-6212, 1572-834X
On-line prístup:Získať plný text
Tagy: Pridať tag
Žiadne tagy, Buďte prvý, kto otaguje tento záznam!
Popis
Shrnutí:Adaptive bit loading enables OFDM systems to optimize the transmit power levels and/or transmission data rates. These algorithms require the knowledge of ideal signal to noise ratio (SNR) for each data subcarrier at both the transmitter and the receiver. However, in practice the channel SNR can only be obtained and shared between the destination and the information source in a quantized fashion. In this paper, we analyze the effect of SNR quantization on the system data rate. We analytically obtain the average data rate loss due to quantization of SNR estimates. We show, via measurement results on powerline communication channels, that the effect of SNR quantization on the system data rate is not negligible if a midtread quantizer with less than 8 bits is used in the SNR estimation process for powerline communications. We also compare obtained results with theoretical capacity values in order to emphasize the data rate loss due to making use of quantized SNR estimates.
Bibliografia:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0929-6212
1572-834X
DOI:10.1007/s11277-012-0662-y