Time Domain Synchronous OFDM (TDS-OFDM) has higher spectral efficiency and faster synchronization than standard cyclic prefix OFDM (CP-OFDM). TDS-OFDM does not support complex modulation scheme such as 256 QAM in low speed vehicular channels. For low speed vehicular channels, it is difficult to completely remove the residual interference when the channel delay spread is large. Also there is performance loss over fast time varying vehicular channels. This paper gives the comparison of performance parameters of TDS- OFDM and CP-OFDM. Also the proposed scheme delivers efficient use of compressive sensing (CS) theory to solve these problems. Using the inter-block- interference (IBI) no interference cancellation is required. Time domain channel estimation and frequency domain data detection can be decoupled in TDS- OFDM receiver. The parameterized channel estimation method proposed is based on priori aided compressive sampling matching pursuit (PA-CoSaMP) algorithm. PA-CoSaMP achieves reliable performance over fast vehicular channels. The proposed scheme will be assessed for efficiency of both systems. Performance of TDS-OFDM and CP-OFDM will be analyzed using simulation results.
CP-OFDM, TDS-OFDM, spectral efficiency, compressive sensing, BER, SNR
