On Codes With Low Peak-to-Average Power Ratio for Multicode CDMA
نویسندگان
چکیده
منابع مشابه
Peak-to-Average Power Ratio Analysis in Multicode CDMA
This paper analyzes the Peak-to-Average Power Ratio (PAPR) problem in Multicode-Code Division Multiple Access (MC-CDMA) systems. The statistical distribution of PAPR is derived and the achievable PAPR reduction for a given code rate is estimated. We show that the PAPR in MC-CDMA communications systems can be reduced by Partial Transmit Sequence (PTS) and Selected Mapping (SLM) approaches. In PT...
متن کاملOn Codes with Low Peak-to-Average Power Ratio for Multi-Code CDMA
Codes which reduce the peak-to-average power (PAPR) in multi-code code division multiple access (MC-CDMA) communications systems are systematically studied. The problem of designing such codes is reformulated as a new coding-theoretic problem: codes with low PAPR are ones in which the codewords are far from the rst-order ReedMuller code. Bounds on the trade-o between rate, PAPR and error-correc...
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Several algorithms have been proposed to construct optimal signature sequences that maximize the sum capacity of the uplink in a direct-spread synchronous code division multiple access (CDMA) system. These algorithms produce signatures with real-valued or complexvalued entries that generally have a large peak-to-average power ratio (PAR). This paper presents an alternating projection algorithm ...
متن کاملPeak-to-Average Ratio Reduction with Analog Codes
| Multi-tone modulation (DMT, Discrete Multitone, OFDM, Orthogonal Frequency Division Multiplex) has the disadvantage of a quite high peak-toaverage ratio. Clipping of the high amplitudes caused by the analog circuitry leads to additional noise. In this contribution we show that in principal so-called Analog Codes (Reed-Solomon Codes over complex numbers) can be used for eliminating this noise.
متن کاملAnalog Codes for Peak-to-Average Ratio Reduction
| Multi-tone modulation (DMT, Discrete Multitone, OFDM, Orthogonal Frequency Division Multiplex) has the disadvantage of a quite high peak-toaverage ratio. Clipping of the high amplitudes caused by the analog circuitry leads to additional noise. In this contribution we show that in principal, so-called Analog Codes (Reed-Solomon Codes over complex numbers) can be used for eliminating this noise.
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ژورنال
عنوان ژورنال: IEEE Transactions on Information Theory
سال: 2004
ISSN: 0018-9448
DOI: 10.1109/tit.2004.825505