Effect of TO & CFO on OFDM and SIR Analysis and Interference Cancellation in MIMO OFDM Systems
OFDM is a multicarrier modulation technique in which a high rate bit-stream is split into N parallel bit-streams of lower rate and each of these are modulated using one of N orthogonal sub-carriers. In a basic communication system, the data is modulated onto a single carrier frequency. OFDM is a promising candidate for achieving high data rates in mobile environment because of its multicarrier modulation technique. The available bandwidth is then totally occupied by each symbol. The variations in Time Offset (TO) can lead to Inter-Symbol-Interference (ISI) in case of frequency selective channel.