Abstract
A major limitation in any high-performance digital communication system is the linearity region of the transmitting amplifier. Nonlinearities typically lead to signal clipping. Efficient communication in such conditions requires maintaining a low peak-to-average power ratio (PAR) in the transmitted signal while achieving a high throughput of data. Excessive PAR leads either to frequent clipping or to inadequate resolution in the analog-to-digital or digital-to-analog converters. Currently proposed signaling schemes for future generation wireless communications suffer from a high PAR. This paper presents a new signaling scheme for channels with clipping which achieves a PAR as low as 3. For a given linear range in the transmitter's digital-to-analog converter, this scheme achieves a lower bit-error rate than existing multicarrier schemes, owing to increased separation between constellation points. We present the theoretical basis for this new scheme, approximations for the expected bit-error rate, and simulation results.
Original language | English |
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Pages (from-to) | 223-241 |
Number of pages | 19 |
Journal | Digital Signal Processing |
Volume | 12 |
Issue number | 2-3 |
DOIs | |
Publication status | Published - 2002 |
Externally published | Yes |
Keywords
- Channel coding
- Lattice codes
- Multicarrier modulation
- Peak-to-average ratio