GSM Channels Physical Channels Associated with frequency bands, time slots, codes Physical channels transfer bits from one network element to another Logical Channels Distinguished by the nature of carried information and the way to assembl

Two MSs are communicating with the same BS. The information to be sent by the two MSs is S1 = [1 -1 1 1] S2=[-11 -1 1] spread by spreading sequences c1 and c2. The radio channels between the MSs and BS are described by impulse responses h1 and h2

This paper talks about the future of the mobile satellite communications. A telephone connection using MSS is similar to a cellular telephone link, except the repeaters are in orbit around the earth, rather than on