CFR and SNR Estimation Based on Complementary Golay Sequences for Single-Carrier Block Transmission in 60-GHz WPAN

Abstract

Abstract-The single-carrier block transmission (SCBT), a.k.a. single-carrier frequency-domain equalization (SC-FDE), is being considered as an option technique for the wireless personal area network (WPAN) operating at 60-GHz. To combat the inter-symbol interference (ISI) in non-line-of-sight (NLOS) environments, the frequency-domain equalization (FDE) based on the minimum mean square error (MMSE) criterion is much more effective than the one based on the zero forcing (ZF) criterion. However, MMSE-FDE needs the estimation of both the channel frequency response (CFR) and the signal-to-noise ratio (SNR). In this work, we estimated CFR and SNR based on the complementary Golay sequences whose sum auto-correlation has a unique peak and zero sidelobe. Through simulations, we proved that the proposed CFR and SNR estimation methods are very effective for SCBT system using MMSE-FDE.

Software and Hardware Solutions for Channel Estimation based on Cyclic Golay Sequences

“…3.2-3.3) and the Signal to Noise Ratio (SNR) are known [5], then a compensation filter can be created to filter the distortions of the radio channel. This compensation filter (H comp ) has to fulfill the following criterion:…”

“…The MMSE equalization technique suppresses these errors, and uses the estimated SNR η for the compensation as well [5]. The transfer function of the MMSE channel equalizer can be expressed as follows: …”

“…Based on their advantageous correlation properties, powerful algorithms can be developed for the receivers to estimate and compensate imperfections [3], [4] or channel impulse response (CIR) [5]. Furthermore, the sequences are evenly distributed along the available spectrum.…”

“…Furthermore, the sequences are evenly distributed along the available spectrum. The conventional solution calculates correlations [5], and the sum of these correlations provides the CIR.…”

Effects of quantization on Golay sequence based channel estimation

“…It calculates the correlation of the incoming signal with the ideal Golay sequences, and the sum of these correlations will result in the CIR [2], [5]. The channel frequency response (CFR) can be also directly estimated based these sequences using the fast Fourier transform (FFT) [2], but it has higher complexity than the Golay correlator.…”