A Study of Channel Estimation Techniques with Carrier-Frequency Offset Estimation in SISO-OFDM Systems

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Topic: Mobility
Format: PDF
The channel estimation techniques for OFDM systems based on pilot arrangement are investigated. That on this basis pilots were inserted among subcarriers in transmitter with distances emerged of sampling theory. This paper is improving channel estimation accuracy in OFDM systems because channel state information is required for signal detection at receiver and its accuracy affects the overall performance of system and it is essential to improve the channel estimation for more reliable communications. For improving the quality of channel estimation, different iterative algorithms are available, such as EM, RLS and LMS, among them LMS is chosen due to its less complexity comparing with other methods and its acceptable performance.

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