TY - GEN
T1 - A peak power reduction method with reduced inter-signal interference for OFCDM signal
AU - Aizawa, Naoki
AU - Muta, Osamu
AU - Akaiwa, Yoshihiko
PY - 2006
Y1 - 2006
N2 - A problem with the OFCDM (Orthogonal Frequency and Code Division Multiplexing) system is that PA PR (Peak to Average Power Ratio) of the signal becomes high. In this paper, we propose a novel peak reduction method which suppresses the inter-signal interference caused by peak power limitation for OFCDM signal. In the proposed method, peak power is reduced by adding the peak reducing signal generated with peak components detected by soft-clipping function. At the receiver, the inter-signal interference is compensated by estimating the peak components removed at the transmitter from the received signal. Performance of a total system including modulation, peak-limiter, predistorter, a model of 2GHz class A/B power amplifier and the receiver is investigated by computer simulation. Computer simulation results show the peak power reduction performance is improved about 1.4dB as compared with that of the conventional PRSA (peak reducing signal addition) method.
AB - A problem with the OFCDM (Orthogonal Frequency and Code Division Multiplexing) system is that PA PR (Peak to Average Power Ratio) of the signal becomes high. In this paper, we propose a novel peak reduction method which suppresses the inter-signal interference caused by peak power limitation for OFCDM signal. In the proposed method, peak power is reduced by adding the peak reducing signal generated with peak components detected by soft-clipping function. At the receiver, the inter-signal interference is compensated by estimating the peak components removed at the transmitter from the received signal. Performance of a total system including modulation, peak-limiter, predistorter, a model of 2GHz class A/B power amplifier and the receiver is investigated by computer simulation. Computer simulation results show the peak power reduction performance is improved about 1.4dB as compared with that of the conventional PRSA (peak reducing signal addition) method.
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U2 - 10.1109/VTCF.2006.172
DO - 10.1109/VTCF.2006.172
M3 - Conference contribution
AN - SCOPUS:34548850086
SN - 1424400635
SN - 9781424400638
T3 - IEEE Vehicular Technology Conference
SP - 796
EP - 800
BT - 2006 IEEE 64th Vehicular Technology Conference, VTC-2006 Fall
T2 - 2006 IEEE 64th Vehicular Technology Conference, VTC-2006 Fall
Y2 - 25 September 2006 through 28 September 2006
ER -