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2006
IEEE

Reduction of Amplitude Clipping Level with OFDM/TDM

8 years 11 months ago
Reduction of Amplitude Clipping Level with OFDM/TDM
—The OFDM signals have a problem of high peak-to-average power ratio (PAPR). Hence, a large transmit-power backoff or amplitude clipping is required. The amplitude clipping causes signal degradation and the BER performance increases. A trade-off between the PAPR reduction and the BER performance is present; the PAPR reduces as the level of clipping reduces, but the BER degrades due to signal distortion. Recently, we proposed OFDM combined with time division multiplexing (OFDM/TDM) to alleviate the high PAPR problem, while achieving better BER performance than OFDM. In this paper, a theoretical bit error rate (BER) analysis of clipped OFDM/TDM system in a frequency-selective fading channel is developed. The average BER performance is evaluated by numerical computation using the derived conditional BER and by computer simulation. It is shown that OFDM/TDM can significantly reduce the amplitude clipping level and the required average signal energy per bit-to-AWGN power spectrum density ...
Haris Gacanin, Shinsuke Takaoka, Fumiyuki Adachi
Added 12 Jun 2010
Updated 12 Jun 2010
Type Conference
Year 2006
Where VTC
Authors Haris Gacanin, Shinsuke Takaoka, Fumiyuki Adachi
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