Title :
BER Analysis for Asymmetric OFDM Systems
Author :
Luo, Lin ; Zhang, Jian Andrew ; Shi, Zhenning
Author_Institution :
Dept. of Inf. Eng., Australian Nat. Univ., Canberra, ACT
Abstract :
To alleviate the high peak-to-average power ratio (PAPR) and sensitivity to carrier frequency offset (CFO) problems, an asymmetric OFDM (A-OFDM) system has been recently proposed. In this paper, the theoretical bit error rate (BER) analysis of the A-OFDM systems is presented. Various modulation methods, i.e., BPSK and M-ray QAM, and equalization techniques, i.e., zero forcing (ZF) and minimum mean square error (MMSE) criteria are considered. Our analysis shows that the BER performance of the A-OFDM system bridges that of conventional OFDM and single carrier systems. Certain advanced equalizers, such as MMSE equalizer, are found to significantly improve the BER performance of the A-OFDM systems. The analysis approach is generally applicable to most modulation schemes and can be extended to any preceded OFDM systems.
Keywords :
OFDM modulation; error statistics; mean square error methods; phase shift keying; quadrature amplitude modulation; BER analysis; BPSK; M-ray QAM; asymmetric OFDM systems; bit error rate analysis; minimum mean square error criteria; orthogonal frequency division multiplexing system; zero forcing equalization techniques; Binary phase shift keying; Bit error rate; Bridges; Equalizers; Error analysis; Mean square error methods; OFDM modulation; Peak to average power ratio; Performance analysis; Quadrature amplitude modulation;
Conference_Titel :
Global Telecommunications Conference, 2008. IEEE GLOBECOM 2008. IEEE
Conference_Location :
New Orleans, LO
Print_ISBN :
978-1-4244-2324-8
DOI :
10.1109/GLOCOM.2008.ECP.874
