What do you mean by co-channel interference and system capacity?
Co channel interference is the interference between two access points(APs) or base stations operating at the same frequency. It can severely degrade the performance of wireless LANs. There can be several reasons of co-channel interference:
1)adverse weather condition
2) poor frequency planning
3) overly crowded radio spectrum
System capacity is the tight upper bound on the rate at which information can be reliably transmitted over a communications channel. The system capacity of a given channel is the limiting information rate that can be achieved with arbitrarily small error probability.
According to Shanon-Hartley theorem, the capacity of the system C is given by:
Where, B is the bandwidth of the channel
S/N is the signal to noise ratio.
What is multiple access technique? Do a comparative study among FDMA,TDMA and CDMA.
Describe the architecture of a 3G network. What are the various services associated with a 3G network?
What are hidden station problem and exposed station problem in WLAN? How are the problems solved?
Describe structured analysis and structured design.
