On the Influence of Carrier Frequency Offset and Sampling Frequency Offset in MIMO-OFDM Systems for Future Digital TV

TL;DR

This paper examines how carrier frequency offset and sampling frequency offset affect the performance of various MIMO-OFDM schemes in future digital TV, highlighting their sensitivities and optimal choices.

Contribution

It provides a comparative analysis of multiple MIMO-OFDM schemes under CFO and SFO, identifying their relative sensitivities for high spectral efficiency digital TV.

Findings

Alamouti scheme is more sensitive to CFO and SFO at high spectral efficiency.

All studied schemes are sensitive to CFO when it exceeds 1% of inter-carrier spacing.

Sensitivity to SFO is generally less than to CFO.

Abstract

This paper investigates the impact of carrier frequency offset (CFO) and sampling frequency offset (SFO) on the performance of different MIMO-OFDM schemes with high spectral efficiency for next generation of terrestrial digital TV. We analyze particularly orthogonal Alamouti scheme, and non-orthogonal (NO) schemes like VBLAST, linear dispersion (LD) code and Golden code. This analysis gives a global view on the best suitable MIMO-OFDM scheme with respect to CFO and SFO. We show that for high spectral efficiency, Alamouti is more sensitive to CFO and SFO. Moreover, we show that all studied MIMO-OFDM schemes are sensitive to CFO when it is greater than 1% of inter-carrier spacing. Their sensitivity due to SFO is less than that due to CFO.