A near blind low complexity carrier frequency offset estimator for OFDM

2008 ◽  
Author(s):  
S.M. Sameer ◽  
R.V.R. Kumar
Keyword(s):  
Carrier Frequency ◽  
Carrier Frequency Offset ◽  
Low Complexity ◽  
Frequency Offset

Robust MVDR Estimation via Polynomial Rooting for MC-CDMA Carrier Frequency Offset

2013 ◽  
Vol 284-287 ◽  
pp. 2687-2693
Author(s):  
Ing Jiunn Su ◽  
Chiao Chan Huang
Keyword(s):  
Carrier Frequency ◽  
Code Division Multiple Access ◽  
Multiple Access ◽  
Carrier Frequency Offset ◽  
Low Complexity ◽  
Frequency Offset ◽  
High Accuracy ◽  
Cdma Systems ◽  
Code Division Multiple ◽  
Polynomial Rooting

In this letter, we present a blind carrier frequency offset (CFO) estimator by exploiting the polynomial rooting technique for multicarrier-code division multiple access (MC-CDMA) systems. Relative high accuracy and low-complexity to the CFO estimation can be achieved by rooting a polynomial. Simulation results are provided for illustrating the effectiveness of the proposed blind polynomial rooting estimator.

scholarly journals Reliability of Trigonometric Transform-based Multi-Carrier Scheme

2018 ◽  
Vol 6 (2) ◽  
pp. 49 ◽  
Author(s):  
Samah A. Mustafa
Keyword(s):  
Carrier Frequency ◽  
Carrier Frequency Offset ◽  
Matched Filter ◽  
Average Power ◽  
Low Complexity ◽  
Frequency Offset ◽  
Fast Transform ◽  
Communication Signal ◽  
Front End ◽  
Trigonometric Transform

This work is looking for a new physical layer of a multi-carrier wireless communication system to be implemented in low complexity way, resorting to suitable fast transform. The work presents and assesses a scheme based on Discrete Trigonometric Transform with appending symmetric redundancy either in each or multiple consecutive transformed blocks. A receiver front-end filter is proposed to enforce whole symmetry in the channel impulse response, and bank of one tap filter per sub-carrier is applied as an equalizer in the transform domain. The behaviour of the transceiver is studied in the context of practical impairments like fading channel, carrier frequency offset and narrow band interference. Moreover, the performance is evaluated in contrast with the state of art methods by means of computer simulations, and it has been found that the new scheme improves robustness and reliability of communication signal, and record lower peak to average power ratio. The study demonstrates that front-end matched filter effectively performs frequency synchronization to compensate the carrier frequency offset in the received signal.

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