Title :
BER performance improvement and PAPR reduction in OFDM systems based on combined DHT and μ-law companding
Author :
Ghahremani, Reza ; Shayesteh, Mahrokh G.
Author_Institution :
Dept. of Electr. Eng., Islamic Azad Univ., Ahar, Iran
Abstract :
High peak to average power ratio (PAPR) is a major drawback of orthogonal frequency division multiplexing (OFDM) systems. Among the various PAPR reduction methods, precoded technique and companding transform appear attractive for their simplicity and effectiveness. This paper proposes a new algorithm based on the combination of discrete Hartley transform (DHT) and μ-law companding for PAPR reduction. Theoretical analysis and numerical simulation are presented. Compared with the conventional μ-law companded OFDM system, the proposed algorithm offers an improved bit error rate (BER) and reduces the PAPR effectively for a large companding parameter.
Keywords :
OFDM modulation; discrete Hartley transforms; error statistics; precoding; μ-law companding; BER performance improvement; DHT; OFDM systems; PAPR reduction method; bit error rate; companding transform; discrete Hartley transform; high peak-to-average power ratio; orthogonal frequency division multiplexing systems; precoded technique; Bit error rate; Modulation; Partial transmit sequences; Peak to average power ratio; Receivers; Transforms; μ-law companding; Discrete Hartley transform (DHT); orthogonal frequency division multiplexing (OFDM); peak to average power ratio (PAPR);
Conference_Titel :
Electrical Engineering (ICEE), 2014 22nd Iranian Conference on
Conference_Location :
Tehran
DOI :
10.1109/IranianCEE.2014.6999768
