Measurement Based Throughput Evaluation of Residual Frequency Offset Compensation in WiMAX
Source: Vienna University of Technology
WiMAX utilizes a physical-layer based on OFDM that is very sensitive to carrier frequency offset. Even though most of this offset can be compensated using the initial training sequence, there still remains a residual frequency offset due to estimation errors. The methods proposed to correct for this remaining offset are mostly tested by means of pure simulation. In this work, the author presents outdoor-to-indoor WiMAX measurements in an alpine scenario in which four residual frequency offset compensation schemes are investigated. The paper evaluates the performance of these schemes in terms of measured throughput rather than only frequency offset estimation error.