Mobile Computing Technologies Essay Example | Topics and Well Written Essays - 3000 words

Mobile Computing Technologies - Essay ExampleThe efficiency of FHSS to resist any disruption from false RF intercommunicates is supposed to be quite a number of times better than the capability of DSSS. The implementation of FSSS system is easier. A lower power density is used by DSSS. This makes the detection of DSSS harder. other reason why DSSS is not preferred is that in order to ensure reception it sends redundant copies of encoded data. unrivaled of the implications that may be associated in this case is that the assignment would have to be within the standards set by ITU. The maximum limit of allocation cannot exceed 300GHz in accordance with the set limits as shown in sort 2 (Roke Manor Research, n.d.)2. The telephone receiver system to be used is based on the Superheterodyne design. Briefly explain the principle of operation of the Superheterodyne and discuss any potential issues which may be of concern with this type of receiver design and receiver systems in general .The way Superhetrodyne receives is that it uses frequency mixing and converts its received signal into a doctor Intermediate Frequency. An If or an Intermediate Frequency is much conveniently processed than the conventional radio immune carrier frequency.One concern with Superhetrodyne is that along with the wanted signal it also generates an unwanted signal which is referred to as take to frequency. This is a problem because it is a false response. The only way this response can be prevented by incorporating a filter that would restrict the image frequency from reaching the mixer.It has been decided that the cost of implementing a indicate communication link is too expensive and the existing cellular infrastructure will be used. The GSM wandering unit 1.5km away is receiving a signal from the Vodafone base station transmitter on top of the Owen twist (postcode S1 1WB).When signals collided with road traffic they can cause diffraction, absorption and multipath fading. When sig nals collide with a material it can regress its strength and its path can be reflected and refracted thus causing a delay in receiving the signal which results in Multipath fading.