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I. Budiarjo, I. Rashad and H. Nikookar, “On the Use of Virtual Pilots with Decision Directed Method in OFDM Based Cognitive Radio Channel Estimation Using 2x1-D Wiener Filter,” Proceedings of IEEE International Con- ference on Communications, Beijing, May 2008, pp. 703- 707.

has been cited by the following article:

• TITLE: Analysis and Comparison of Time Replica and Time Linear Interpolation for Pilot Aided Channel Estimation in OFDM Systems

  AUTHORS: Donglin Wang

  KEYWORDS: OFDM, Channel Estimation, Time Replica, Time Linear Interpolation, Virtual Pilots

  JOURNAL NAME: International Journal of Communications, Network and System Sciences, Vol.3 No.5, May 31, 2010

  ABSTRACT: This paper analyzes and compares two time interpolators, i.e., time replica and time linear interpolator, for pilot aided channel estimation in orthogonal frequency division multiplexing (OFDM) systems. The mean square error (MSE) of two interpolators is theoretically derived for the general case. The equally spaced pilot arrangement is proposed as a special platform for these two time interpolators. Based on this proposed platform, the MSE of two time interpolators at the virtual pilot tones is derived analytically; moreover, the MSE of per channel estimator at the entire OFDM symbol based on per time interpolator is also derived. The effectiveness of the theoretical analysis is demonstrated by numerical simulation in both the time-invariant frequency-selective channel and the time varying frequency-selective channel.