Spectrum handoff is extremely challenging in CR networks, especially in cognitive radio mobile ad hoc networks (CR-MANETs), because of frequent topologic variations, limited power, limited channel transmission range, bandwidth constraints, and lack of the central controlling entity.
The VoIP call carrying capacity of wireless mesh networks based on classical CSMA/CA (e.g., the IEEE 802.11 standard) is low compared to the raw available bandwidth, due to lack of bandwidth and delay guarantees.
If only lightweight seismic sources are available, the seismic data generally exhibit a narrow frequency bandwidth: the lack of high frequency components generally prevents from having good quality shallow reflections.
Whatever the reason – management bandwidth, cultural deafness, lack of attention, arrogance as the toxic waste of success – Google either didn't see Facebook or failed to develop the right service at the right time.
The combination of an intermittent, low-bandwidth network connection and a lack of memory space on the devices resulted in slow load times and constant crashes.
It is a challenging problem to design an efficient real-time video transport system for the present best-effort Internet because of the strict bandwidth, loss and time constraints and the lack of quality of service (QoS) guarantees from the present IP networks.
Signal duration, bandwidth, and number of harmonics decreased, whereas the maximum, minimum and bandwidth of the fundamental, and peak spectral frequency all increased.
As for radio, it might have been used for two-way chit-chat half a century earlier than it was, had it not been for disapproving regulators and a lack of bandwidth.For communications companies, human loquacity should be wonderful news.
The distributed environment, little or no predetermined infrastructure, mobility, lack of bandwidth and scalability are challenges and issues that distinguish the existing WSNs from traditional WSNs [13].
