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The objective of this thesis is to study the possible optical fronthauling techniques and
demonstrate an efficient scheme for the transmission of 4G and proposed 5G waveforms
in the optical domain. Performance of the fronthauling techniques - DBBoF, AIFoF and
DIFoF is first investigated through simulations for transmission of OFDM signals. The
meri...
Contexts in source publication
Context 1
... based circular filtering of GFDM requires longer filter length apart from giving higher OOB emissions. UF-OFDM performs linear filtering on sub-band of subcar- (Fig. 10(c)) is apparent as OOB emission is highly reduced compared to both GFDM ( Fig. 10(b)) and OFDM ( Fig. 10(a)). For checking spectral containment of 5G waveforms, UF-OFDM and GFDM, multiple signals of 201 MHz bandwidth were transmitted, similar to LTE, through fronthaul net- work and performance is compared with OFDM. UF-OFDM and OFDM ...
Context 2
... based circular filtering of GFDM requires longer filter length apart from giving higher OOB emissions. UF-OFDM performs linear filtering on sub-band of subcar- (Fig. 10(c)) is apparent as OOB emission is highly reduced compared to both GFDM ( Fig. 10(b)) and OFDM ( Fig. 10(a)). For checking spectral containment of 5G waveforms, UF-OFDM and GFDM, multiple signals of 201 MHz bandwidth were transmitted, similar to LTE, through fronthaul net- work and performance is compared with OFDM. UF-OFDM and OFDM exhibit similar performance for single band transmission at 1.5 GHz, as seen from EVM ...
Context 3
... based circular filtering of GFDM requires longer filter length apart from giving higher OOB emissions. UF-OFDM performs linear filtering on sub-band of subcar- (Fig. 10(c)) is apparent as OOB emission is highly reduced compared to both GFDM ( Fig. 10(b)) and OFDM ( Fig. 10(a)). For checking spectral containment of 5G waveforms, UF-OFDM and GFDM, multiple signals of 201 MHz bandwidth were transmitted, similar to LTE, through fronthaul net- work and performance is compared with OFDM. UF-OFDM and OFDM exhibit similar performance for single band transmission at 1.5 GHz, as seen from EVM of Fig. 11, as UF- ...
Context 4
... 10(b)) and OFDM ( Fig. 10(a)). For checking spectral containment of 5G waveforms, UF-OFDM and GFDM, multiple signals of 201 MHz bandwidth were transmitted, similar to LTE, through fronthaul net- work and performance is compared with OFDM. UF-OFDM and OFDM exhibit similar performance for single band transmission at 1.5 GHz, as seen from EVM of Fig. 11, as UF- OFDM's lower OOB emission property does not have any bearing on system performance. Spectral guard-band of 20 MHz, equal to 10% of the bandwidth, is chosen between 5G signal bands for multi-band transmission of all three waveforms. As the guard-band between 5G waveforms decreases, the performance improvement due to reduced OOB ...
Context 5
... Received spectrum of GFDM (b) EVM of OFDM, GFDM and UF-OFDM Figure 12: Results for transmission of 10 bands over AIFoF fronthaul scheme. ...
Context 6
... bands of these waveforms were transmitted through the fronthaul network and their performance is evaluated. Received signal spectra for 10 bands of GFDM is shown in 13a and 13b shows the spectrum and EVM for LTE and UF-OFDM bands in the above mentioned coexistence scenario. UF-OFDM's signal bands can be successfully de- modulated for P rx ≥ -16 dBm similar to what was observed from the results of 5 band transmission of 5G waveform. ...
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