Single Carrier Frequency Domain Equalization Technology Applied to Broadband Wireless Communications

Broadband wireless communication is an attractive technology,which offers bit rates of tens of megabits to hundreds of megabits per second.In wireless environments one likely faces with hostile radio propagation environments.Multipath delay spreads are extended over tens or hundreds of bit intervals,so the measures to combat the multipath effects are the key point.The single carrier frequency domain equalization(SC-FDE),which is adopted by communication standards,is a type of anti-multipath measures.SC-FDE has similar performance,efficiency,and low signal processing complexity advantages as OFDM.Similarities and differences of SC and OFDM systems are discussed in this paper.SC-FDE is a single carrier system with frequency domain equalization.Some algorithms in OFDM are adopted while techniques in single carrier system are reserved.Phase lock techniques which are widely applied in a single carrier system and the frame synchronization algorithm used in OFDM are important SC-FDE.Channel estimation and equalization algorithm for SC-FDE are analyzed.The performance of SC-FDE is verified by simulation.The results have verified the anti-multipath ability.