TY - GEN
T1 - A new DCT matrix precoding based RI-OFDMA uplink system for PAPR reduction
AU - Baig, Imran
AU - Jeoti, Varun
PY - 2012/9/20
Y1 - 2012/9/20
N2 - High peak-to-average power ratio (PAPR) is one of the major drawbacks in the transmitted random-interleaved orthogonal frequency division multiple access (RI-OFDMA) uplink signal. The PAPR increases the complexity of analogue-to-digital (A/D) and digital-to-analogue (D/A) convertors and also reduces the efficiency of RF high-power-amplifier (HPA). This paper presents a new Discrete-Cosine transform matrix (DCTM) precoding based RI-OFDMA uplink system for high PAPR reduction. Computer simulation results show that the proposed precoding based uplink system has low PAPR as compare to those of the Walsh-Hadamard transform (WHT) precoding based RI-OFDMA uplink systems and the conventional RI-OFDMA uplink systems respectively. Additionally, the biterror-rate (BER) performance of the proposed uplink system is much better than the conventional RI-OFDMA uplink systems and at par with the WHT precoded RI-OFDMA uplink systems. Therefore, such a good improvements in both PAPR and BER offered by the proposed precoding based uplink system can notably reduce the cost and complexity of the uplink transmitter.
AB - High peak-to-average power ratio (PAPR) is one of the major drawbacks in the transmitted random-interleaved orthogonal frequency division multiple access (RI-OFDMA) uplink signal. The PAPR increases the complexity of analogue-to-digital (A/D) and digital-to-analogue (D/A) convertors and also reduces the efficiency of RF high-power-amplifier (HPA). This paper presents a new Discrete-Cosine transform matrix (DCTM) precoding based RI-OFDMA uplink system for high PAPR reduction. Computer simulation results show that the proposed precoding based uplink system has low PAPR as compare to those of the Walsh-Hadamard transform (WHT) precoding based RI-OFDMA uplink systems and the conventional RI-OFDMA uplink systems respectively. Additionally, the biterror-rate (BER) performance of the proposed uplink system is much better than the conventional RI-OFDMA uplink systems and at par with the WHT precoded RI-OFDMA uplink systems. Therefore, such a good improvements in both PAPR and BER offered by the proposed precoding based uplink system can notably reduce the cost and complexity of the uplink transmitter.
UR - http://www.scopus.com/inward/record.url?scp=84867957755&partnerID=8YFLogxK
U2 - 10.1109/ICIAS.2012.6306100
DO - 10.1109/ICIAS.2012.6306100
M3 - Conference contribution
AN - SCOPUS:84867957755
SN - 9781457719677
T3 - ICIAS 2012 - 2012 4th International Conference on Intelligent and Advanced Systems: A Conference of World Engineering, Science and Technology Congress (ESTCON) - Conference Proceedings
SP - 680
EP - 684
BT - ICIAS 2012 - 2012 4th International Conference on Intelligent and Advanced Systems
T2 - 2012 4th International Conference on Intelligent and Advanced Systems, ICIAS 2012
Y2 - 12 June 2012 through 14 June 2012
ER -