Umamaheswari Govindaswamy

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The demand for wireless networks is increasing rapidly and it becomes essential to design existing Public-Key Infrastructure (PKI) useful for wireless devices. A PKI is a set of procedures needed to create, distribute and revoke digital certificates. PKI is an arrangement that binds public keys with respective user identities by means of a Certificate(More)
Spread spectrum (SS) and multicarrier modulation (MCM) techniques are recognized as potential candidates for the design of underlay and interweave cognitive radio (CR) systems, respectively. Direct Sequence Code Division Multiple Access (DS-CDMA) is a spread spectrum technique generally used in underlay CR systems. Orthogonal Frequency Division Multiplexing(More)
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