Role of Walsh Codes and pseudorandom noise sequences in CDMA
Puneet Chawla, Balwinder Singh · 2014
Walsh Codes are a set of orthonormal codes while PN Sequences are statistically random but deterministically formed binary sequences. This paper discusses the basic concepts underlying both sets of codes and some of their practical and interesting properties. Both are extensively used for multiple access channeling methods and data signal modulation particularly in international CDMA standards. Their implementation in CDMA and the factors influencing their relative performance are also explained.