Digital traffic channels: The most notable difference between the two generations is that first generation systems are almost purely analog, where as second generation systems are digital. In particular, the first generation systems are designed to support voice channels using
FM; digital traffic is supported only by the use of a modem that converts the digital data into analog form. Second generation systems provide digital traffic channels. These readily support digital data; voice traffic is first encoded in digital form before transmitting. Of course, for second-generation systems, the user traffic (data or digitized voice) must be converted to an analog signal for transmission between the mobile unit and the base station.
Encryption:
Because all of the user traffic, as well as control traffic, is digitized in
second-generation systems, it is a relatively simple matter to encrypt all of the traffic to prevent eavesdropping. All second-generation systems provide this capability, whereas first generation systems send user traffic in the clear, providing no security.
Error detection and correction:
The digital traffic stream of second-generation systems also lends itself to the use of error detection and correction techniques. The result can be very
clear voice reception.
Channel access:
In first generation systems, each cell supports a number of channels. At
any given time a channel is allocated to only one user. Second generation systems also provide multiple channels per cell, but each channel is dynamically shared by a number of users using time division multiple access (TDMA) or code division multiple access (CDMA).
the first used the analog signal but secund used the degital signal becuse multimedia application
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differences between 5th generation computer age and human brain
The main difference between cellular and a cellular cementum is that cellular cementum contains cementocytes, while a cellular cementum does not contain any active cells and can not regenerate.
That it have cell
The basic difference between generations is their age - one is older than the other. This leads to differences at the cultural level.
The difference between living and non-living is: the 6chararistics of living things:1.) cellular
the similarities between cellular respiration and photosynthesis is that they both follow the same basic pattern.The only differences are that photosynthesis gets the energy from sunlight, consumes carbondioxide, and produces oxygen, while cellular respiration consumes oxygen and water, and produces carbon dioxide and water.
get a group together and go underneath the pole. to do this click in between the firstand secons skilss and then click in between the fifth and sixth.
The generation of ones parents was way more family oriented. Whereas the current generation is almost dependent on technology and electronic devices.
There is no such thing as a 7th generation I pod Nano. It only goes up to a 6th generation I pod Nano. I looked it up on Wikipedia and they have no records of a 7th generation.
The eggs are the biggest cells in the body, while the sperm is the smallest.
The same as all cellular network frequencies: From 824 to 849MHz, and 869 to 894MHz. The twenty frequencies bandwidths between the two blocks is reserved for Airphone, public safety, Nextel, and Specialized Mobile Radio (SMR). the primary difference between 2G (2nd Generation) and 1G (1st Generation) cellular is that 2g applications were digitally encrypted, starting with cellular providers' switches (the system on which all cellular calls pass) and later to digital phones.
It is a fact, especially referring to the differences between parents and children, came into use in the 1960's