Abstract
Channel estimation in coherent OFDM by inserting pilot-symbols into two-dimensional time- frequency lattice is a promising candidate for improving channel transmission capacity in future wireless communication systems. This paper proposes a new Cartesian mathematical concept of the Hexagonal Pilot Pattern, Hexagonal Pilot with Virtual and Rectangular Pilot Pattern. The main focus of this work is to compare between the two pilots and by virtue of simulation conclusion which of the two pilots yields a better performance.
Highlights
IntroductionOne of the most important techniques applied in Physical layer of WiMAX is known as Orthogonal Frequency -Division Multiplexing (OFDM), which is the system for data transmission and the support for channel estimation and synchronization
One of the most important techniques applied in Physical layer of WiMAX is known as Orthogonal Frequency -Division Multiplexing (OFDM), which is the system for data transmission and the support for channel estimation and synchronization.Many authors proposed the concept of pilot tones to interpolate the channel response in [1] and [2], recently some literature proposed methods of pilot symbols apart from the existing equi-spaced pilot pattern for OFDM system as described in [4] and [5]
This paper proposes a new Cartesian mathematical concept of the Hexagonal Pilot Pattern, Hexagonal Pilot with Virtual and Rectangular Pilot Pattern
Summary
One of the most important techniques applied in Physical layer of WiMAX is known as Orthogonal Frequency -Division Multiplexing (OFDM), which is the system for data transmission and the support for channel estimation and synchronization. Many authors proposed the concept of pilot tones to interpolate the channel response in [1] and [2], recently some literature proposed methods of pilot symbols apart from the existing equi-spaced pilot pattern for OFDM system as described in [4] and [5]. We are focusing on a specific pilot subcarriers by doing the analytical description and structural pilot of the two different pilots known as Hexagonal and Rectangular.
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