1. Average of the absolute value of the amplitude information of the in-phase components and of the quadrature phase components are determined over the number of symbols.

2. Simulation results show that the BER and PER performance can be improved obviously when in-phase channel and quadrature-phase channel of each sub-carrier are inserted in the pilot symbols.

3. Sychronous detector provides a representation of the IF signal, including phase and amplitude without loss of information. The baseband in-phase (I) and quadrature-phase (Q) signals are digitized using a pair of A/D converters The synchronous detector is also referred to as a quadrature channel receiver, quadrature detector, I/Q demodulator, or coherent detector.