Elements of information theory
Elements of information theory
Reducing ICI in OFDM Systems Using a Proposed Pulse Shape
Wireless Personal Communications: An International Journal
A Subcarrier Allocation Algorithm for Efficiently Reducing Power in Multiuser OFDM Systems
Wireless Personal Communications: An International Journal
Insights on ICI and its effects on performance of OFDM systems
Digital Signal Processing
Bounds on Inter-carrier Interference Power of OFDM in a Gaussian Scattering Channel
Wireless Personal Communications: An International Journal
Wireless Personal Communications: An International Journal
Bit loading with BER-constraint for multicarrier systems
IEEE Transactions on Wireless Communications
Combined equalization and coding using precoding
IEEE Communications Magazine
Channel capacity of OFDM systems employing diversity in fading environments
Wireless Communications & Mobile Computing
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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.