Peak power reduction of OFDM signals with sign adjustment
نویسندگان
چکیده
منابع مشابه
Peak-to-Average Power Ratio Reduction Techniques for OFDM Signals
Orthogonal frequency division multiplexing (OFDM) has been adopted as a standard for many modern wireless applications requiring high data rate due to bandwidth efficiency, resistance to frequency selective fading and simple digital realization using IFFT/FFT operations. However, physical implementation of the OFDM system suffers from several difficulties. One of the major limitations of OFDM i...
متن کاملPeak to average power ratio reduction of OFDM signals using peak reduction carriers
A technique is described for a better than 5 dB reduction in the Peak to Average Power Ratio (PAPR) of an OFDM signal. The optimal amplitude and phase of additional peak reduction carriers (PRC) is obtained using a codebook, which is obtained using a search of all possible signal combinations.
متن کاملOFDM Peak-to-Average Power Reduction Scheme with Spectral Masking
Clipping and filtering can be a simple and effective method of reducing the peak-to-average power ratio (PAPR) for an orthogonal frequency division multiplexed (OFDM) signal. To be effective the clipping must be performed on an oversampled version of the time domain signal, but this results in out-ofband (OOB) power. It has previously been shown that the OOB signals can be filtered out using a ...
متن کاملFast Peak - Power Reduction for Mimo - Ofdm Systems with Diversity
A robust peak-power reduction technique called active constellation extension (ACE) reduces the peak-to-average power ratio (PAPR) of single-input single-output (SISO) orthogonal frequency-division modulated (OFDM) signals by extending the outer constellation points in a way that minimizes the PAPR of an OFDM transmit signal, without reducing the bandwidth or increasing bit error rate (BER). Re...
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A major drawback of orthogonal frequency-division multiplexing (OFDM) signals is their high peak-to-average power ratio (PAPR), which causes serious degradation in performance when a nonlinear power amplifier (PA) is used. Companding transform is a well-known method to reduce PAPR without restrictions on system parameters such as number of subcarriers, frame format and constellation type. Recen...
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ژورنال
عنوان ژورنال: IEEE Transactions on Communications
سال: 2009
ISSN: 0090-6778
DOI: 10.1109/tcomm.2009.07.080012