High-Order Spectral-Null Multimode Codes
Y. Xin, I.J. Fair · IEEE Transactions on Communications · 2004
A new class of codes with high-order spectral nulls at zero frequency is introduced. The codes, called high-order spectral-null multimode codes, are constructed through state-dependent encoding by use of the guided-scrambling coding technique, and result in efficiently coded sequences with good low-frequency characteristics.