Discrete-time signal processing (2nd ed.)
Discrete-time signal processing (2nd ed.)
Advanced Engineering Mathematics: Maple Computer Guide
Advanced Engineering Mathematics: Maple Computer Guide
Convex Optimization
Minimum Autocorrelation Spreading Codes
Wireless Personal Communications: An International Journal
Minimum Cross Correlation Spreading Codes
Wireless Personal Communications: An International Journal
Adaptive estimation of eigensubspace
IEEE Transactions on Signal Processing
Conjugate gradient eigenstructure tracking for adaptive spectralestimation
IEEE Transactions on Signal Processing
Multi-user detection for DS-CDMA communications
IEEE Communications Magazine
Spreading codes for direct sequence CDMA and wideband CDMA cellular networks
IEEE Communications Magazine
Spread spectrum access methods for wireless communications
IEEE Communications Magazine
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Inter symbol interference (ISI) and multiple access interference (MAI) appear in code division multiple access systems when the spreading codes are not orthogonal. ISI and MAI are function of the auto and cross correlation values of the spreading codes. In this paper we investigate the tradeoff between auto and cross correlation properties; we formulate the optimum solution for both cases, transform the problem from multi-criterion to single criterion optimization problem, then formulate the dual problem, and find the optimal tradeoff solution where minimum auto and cross correlation values are attained. Minimum Correlation codes show a great enhancement in performance compared to Hadamard codes.