NDLI: A New Approach to Sign-Bit-Based Parameter Estimation in OFDM Receivers

Content Provider	Springer Nature Link
Author	Diaz, Isael Wilhelmsson, Leif R. Sofotasios, Paschalis C. Miao, Yun Tan, Siyu Edfors, Ove Öwall, Viktor
Copyright Year	2015
Abstract	This article combines algorithm development, thorough analysis and implementation of sign-bit (SB) estimation techniques for symbol timing, carrier frequency offset (CFO) and signal-to-noise ratio (SNR) in orthogonal frequency division multiplexing receivers. The SB estimation is compared in terms of performance and hardware complexity to an equivalent implementation with higher quantization. The techniques are demonstrated by simulation of a SB time/frequency and SB-SNR estimator for 3rd Generation Partnership Project long-term evolution (LTE) cell search in 65-nm technology operating at nominal voltage of 1.2 V. According to post-layout power simulations with toggling information, the architecture estimates the corresponding CFO and SNR for as little as $$479\,μ \hbox {W}$$ average power for LTE-R8/10, while occupying a silicon area as small as $$0.03\,\hbox {mm}^2$$ . Even though SB estimation experiences some relative performance penalty when compared to 8-bit quantization, this paper demonstrates various advantages and the potential of employing these techniques in low-complexity terminals.
Starting Page	3631
Ending Page	3660
Page Count	30
File Format	PDF
ISSN	0278081X
Journal	Circuits, Systems, and Signal Processing
Volume Number	34
Issue Number	11
e-ISSN	15315878
Language	English
Publisher	Springer US
Publisher Date	2015-03-27
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	OFDM CFO Symbol timing Receiver design Time synchronization SNR LTE Circuits and Systems Electrical Engineering Signal, Image and Speech Processing Electronics and Microelectronics, Instrumentation
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Signal Processing

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