Discrete Applied Mathematics - Coding, cryptography and computer security
Generalized Reed-Muller codes and power control in OFDM modulation
IEEE Transactions on Information Theory
On the existence and construction of good codes with low peak-to-average power ratios
IEEE Transactions on Information Theory
Dentist 2: 00On codes with low peak-to-average power ratio for multicode CDMA
IEEE Transactions on Information Theory
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In this paper, codes which reduce the peak-to-average power ratio (PAPR) in multi-code code division multiple access (MC-CDMA) communication systems are studied. It is known that using bent functions to define binary codewords gives constant amplitude signals. Based on the concept of quarter bent functions, a new inequality relating the minimum order of terms of a bent function and the maximum Walsh spectral magnitude is proved, and it facilitates the generalization of some known results. In particular, a new simple proof of the non-existence of the homogeneous bent functions of degree m in 2m boolean variables for m 3 is obtained without invoking results from the difference set theory. We finally propose a new coding approach to achieve the constant amplitude transmission of codeword length 2m for both even m as well as odd m.