A New Joint Coding and Modulation Scheme for Channels with Clipping

✍ Scribed by I.Vaughan L. Clarkson; Iain B. Collings

• Book ID: 102570349
• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 190 KB
• Volume: 12
• Category: Article
• ISSN: 1051-2004
• DOI: 10.1006/dspr.2002.0452

✦ Synopsis

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.  2002 Elsevier Science (USA)