Peak to Average Power Reduction for Low-Power OFDM Systems

— For Orthogonal Frequency-Division Multiplexing (OFDM) systems, Peak to Average Power Ratio (PAPR) can be a major impediment to efficient transmission due to the need to use inefficient highly linear amplifiers. This paper presents an iterative algorithm to reduce the PAPR of a low-power OFDM system by 3 dB at a clipping probability of 10−2 , and over 5 dB for 10−5 with asymptotically no loss in code rate for low signal to noise ratios (SNR). The reduced PAPR allows the system to use a more efficient form of linear amplifier, for an overall reduction in transmitter power consumption by over a factor of three at low SNR. In addition, the algorithm does not require any side information to be transmitted to the receiver to allow decoding.

• Type: Conference
• Year: 2007
• Where: ICC
• Authors: Everest W. Huang, Gregory W. Wornell
• Keywords: Communications, ICC 2007, Linear Amplifier, Low-power Ofdm, Orthogonal Frequency-division Multiplexing