Junaid Ahmed - Academia.edu (original) (raw)
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Papers by Junaid Ahmed
Arabian Journal for Science and Engineering, 2018
Multicarrier code-division multiple access (MC-CDMA), multicarrier direct-sequence CDMA (MC DS-CD... more Multicarrier code-division multiple access (MC-CDMA), multicarrier direct-sequence CDMA (MC DS-CDMA) and multitone CDMA (MT-CDMA) are three flavors of spread spectrum multicarrier communications. Multiple access interference, inter-carrier interference, self-interference and noise are the major factors that deteriorate their spectral efficiency. A novel joint analysis of spectral efficiency is presented for asynchronous MC-CDMA, MC DS-CDMA and MT-CDMA in a frequencyselective Rayleigh fading environment. This allows us to compare performance of the three schemes in indoor and outdoor environments in the presence of interferers, carrier frequency offset, multipath fading and noise.
2010 IEEE Global Telecommunications Conference GLOBECOM 2010, 2010
AbstractWe consider a wireless communication model where a large number of transmitter-receiver ... more AbstractWe consider a wireless communication model where a large number of transmitter-receiver pairs share a common Rayleigh fading channel without any coordination between them. The performance of a simple coexistence etiquette is analyzed in details, ...
Arabian Journal for Science and Engineering, 2018
Multicarrier code-division multiple access (MC-CDMA), multicarrier direct-sequence CDMA (MC DS-CD... more Multicarrier code-division multiple access (MC-CDMA), multicarrier direct-sequence CDMA (MC DS-CDMA) and multitone CDMA (MT-CDMA) are three flavors of spread spectrum multicarrier communications. Multiple access interference, inter-carrier interference, self-interference and noise are the major factors that deteriorate their spectral efficiency. A novel joint analysis of spectral efficiency is presented for asynchronous MC-CDMA, MC DS-CDMA and MT-CDMA in a frequencyselective Rayleigh fading environment. This allows us to compare performance of the three schemes in indoor and outdoor environments in the presence of interferers, carrier frequency offset, multipath fading and noise.
2010 IEEE Global Telecommunications Conference GLOBECOM 2010, 2010
AbstractWe consider a wireless communication model where a large number of transmitter-receiver ... more AbstractWe consider a wireless communication model where a large number of transmitter-receiver pairs share a common Rayleigh fading channel without any coordination between them. The performance of a simple coexistence etiquette is analyzed in details, ...