Spectrum Challenges and Solutions by Cognitive Radio: An Overview. - K. Sridhara; Ashok Chandra; Purnendu S. M. Tripathi (Wirel. Pers. Commun., 2008)

Energy efficiency in cognitive radio network. - Purnendu S. M. Tripathi; Ramjee Prasad (VITAE, 2013)

TV white spectrum in India. - Purnendu S. M. Tripathi; Ashok Chandra; Ramjee Prasad (WPMC, 2013)

Spectrum Trading in India and 5G. - Purnendu S. M. Tripathi; Ramjee Prasad (J. ICT Stand., 2013)

2G spectrum auction in India - An analysis. - Purnendu S. M. Tripathi; Ashok Chandra; Ramjee Prasad (VITAE, 2014)

Deployment of Cognitive Radio in India. - Purnendu S. M. Tripathi; Ashok Chandra; Ramjee Prasad (Wirel. Pers. Commun., 2014)

Spectrum for 5G Services. - Purnendu S. M. Tripathi; Ramjee Prasad (Wirel. Pers. Commun., 2018)

An Overview of Intelligent Transport System (ITS) and Its Applications. - Purnendu S. M. Tripathi; Ambuj Kumar; Ashok Chandra (J. Mobile Multimedia, 2021)