[23]

Optimal Gain Control for Single-Carrier Communications with Uniform Quantization

S. Krone and G. Fettweis

The paper has been accepted for publication at the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP'10, www.icassp2010.com)

Abstract: The achievable rate of digital communications systems can strongly depend on the analog-to-digital conversion at the receiver. It is hence important to adjust the gain control at the receiver in such a way that the performance degradation due to the analog-to-digital conversion is as small as possible. This paper studies the concept of an optimal gain control to maximize the achievable rate of single-carrier systems that employ analog-to-digital conversion with uniform quantization. Transmission of complex-valued symbols is considered, and a phase offset between transmitter and receiver is taken into account. The optimal gain control derives from the average mutual information between the transmitted symbols and quantized received samples. Allowing for a small tolerance of the achievable rate, it is possible to adequately adjust the gain control even with limited accuracy.

Deutsch		Home	Partners	Sub-Projects	Publications
Publications Publications, alphabetical order Publications 2008 Publications 2009 Publications 2010 Publications 2011 ICC 2009 PR 01/2009 Final Presentation	[23] Optimal Gain Control for Single-Carrier Communications with Uniform Quantization S. Krone and G. Fettweis The paper has been accepted for publication at the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP'10, www.icassp2010.com) Abstract: The achievable rate of digital communications systems can strongly depend on the analog-to-digital conversion at the receiver. It is hence important to adjust the gain control at the receiver in such a way that the performance degradation due to the analog-to-digital conversion is as small as possible. This paper studies the concept of an optimal gain control to maximize the achievable rate of single-carrier systems that employ analog-to-digital conversion with uniform quantization. Transmission of complex-valued symbols is considered, and a phase offset between transmitter and receiver is taken into account. The optimal gain control derives from the average mutual information between the transmitted symbols and quantized received samples. Allowing for a small tolerance of the achievable rate, it is possible to adequately adjust the gain control even with limited accuracy.