Title :
2n prime-sequence codes and coding architecture for optical code-division multiple-access
Author :
Kwong, Wing C. ; Yang, Guu-Chang ; Zhang, Jian-Guo
Author_Institution :
Dept. of Eng., Hofstra Univ., Hempstead, NY, USA
fDate :
9/1/1996 12:00:00 AM
Abstract :
Recent study shows that optical code-division multiple-access (CDMA) networks cannot be evaluated or designed by only considering the performance (i.e., correlation properties) of the optical pseudo-orthogonal codes selected. The structures of optical encoders and decoders are another important factors to consider and are needed to coordinate with the selected optical codes as much as possible. A special family of 2n codes, so-called 2n prime-sequence codes, is constructed. A general theorem on the cardinality of the new codes is provided. The properties and performance of the codes are also studied. Since these codes pose the algebraic properties of both prime-sequence and 2n codes, new optical encoding and decoding structures are designed to optimize the system parameters (e.g., power budget and cost) of these optical CDMA networks. This new configuration is particularly attractive for ultrafast optical processing and waveguide implementation for tile future high-capacity, low-loss, all-optical CDMA networks
Keywords :
algebraic codes; code division multiple access; decoding; high-speed optical techniques; optical fibre networks; optical information processing; optical waveguides; sequences; 2n prime-sequence codes; algebraic properties; all-optical CDMA networks; cardinality; coding architecture; correlation properties; cost; general theorem; high-capacity CDMA networks; low-loss CDMA networks; optical CDMA networks; optical code-division multiple-access; optical decoders; optical encoders; optical pseudoorthogonal codes; performance evaluation; power budget; system parameters; ultrafast optical processing; waveguide implementation; Cost function; Decoding; Design optimization; Encoding; Multiaccess communication; Optical design; Optical fiber networks; Optical waveguide components; Optical waveguides; Ultrafast optics;
Journal_Title :
Communications, IEEE Transactions on