A new OFDM postfix-PP

作者：Jiao Xian Jun^*; Chen Jiang; Jiang Wei; Xiang Hai Ge

来源：Acta Electronica Sinica, 2006, 34(7): 1216-1221.

• Channel estimation
• Cyclic prefixes
• OFDM symbols
• Pilot postfixes
• Pilot power allocation
• Postfix signals
• Zeros postfixes

A new postfix signal, called 'PP' (Pilot Postfix), for Orthogonal Frequency Division Multiplexing (OFDM) system is proposed. PP is formed by linear processing to pilots in OFDM symbol, and can be combined with those pilots in OFDM symbol at receiver. Channel estimation and demodulation algorithm are proposed for PP-OFDM also. Theoretical analysis shows that PP can improve channel estimation performance compared with cyclic prefix/zeros postfix (CP/ZP). Simulation shows that PP-OFDM has lower Bit Error Rate than CP/ZP-OFDM because of better channel estimation performance, when CP/ZP/PP-OFDM have their own optimal pilot power allocation respectively. The optimal power allocation of PP-OFDM can be found by two-dimension searching, while there is only one-dimension needed to optimize for CP/ZP-OFDM.

• 出版日期2006
• 单位北京大学