Research Article
Transform Methods for the Reduction of the Peak to Average Power Ratio for the OFDM Signal
Table 1
PAPR Improvement in dB at CCDF of 10−3 for the precoding, DSI, and the hybrid precoding-DSI methods (PAPR = 10 dB for standard OFDM).
| | | 16 QAM | 64 QAM | | | Number of recursions | Improvement in PAPR (dB) | Number of recursions | Improvement in PAPR (dB) |
| | OFDM | 1 | — | 1 | — | | WHT | 1 | 1.07 | 1 | 0.94 | | DCT | 1 | 1.84 | 1 | 1.80 | | DHT | 1 | 3.70 | 1 | 3.04 | | DSI | 8.69 | 0.39 | 14.41 | 0.48 | | DSI (All) | 16 | 0.64 | 64 | 0.78 | | WHT-DSI | 8.41 | 1.11 | 44.49
() | 1.26
() | | WHT-DSI | 11.03 | 1.17 | | WHT-DSI (All) | 16 | 1.30 | 64 | 1.41 | | DCT-DSI | 8.09 | 1.96 | 16.64 | 1.77 | | DCT-DSI | 13.36 | 2.09 | — | — | | DCT-DSI (All) | 16 | 2.13 | 64 | 1.90 | | DHT-DSI | 7.23 | 3.78 | 16.58 | 3.16 | | DHT-DSI | 10.21 | 3.79 | — | — | | DHT-DSI (All) | 16 | 3.81 | 64 | 3.18 |
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