now to fig1 the input to the transmitter includes cbr data streams 2 and vbr data streams 4 as shown cbr data 2 and vbr data 4 are input by multiple users and applications cbr data streams 2 are spread with modulator 10 using cdma with a cbr spreading factor 6 to create cbr cdma data the transmitters upconvert these cbr cdma data streams from baseband to rf with rf modulator 12 the cbr cdma rf data then passes to antennas 14 which transmit the cbr cdma rf data vbr data streams 4 are spread by modulator 10 u2032 using cdma with a vbr spreading factor 8 to create vbr cdma data the transmitters upconvert the vbr cdma data from baseband to rf in rf modulator 12 the vbr cdma rf data then passes to antennas 14 which transmit the vbr cdma rf data the notation of code 1 code n and code n 1 indicates simply that these values are different when the transmitters transmit vbr cdma rf data over the physical channels 24 the transmitters transmit the vbr cdma rf data in bursts of vbr cdma rf data packets 18 at specified intervals in individual time slots thus multiple vbr cdma rf data streams are interleaved using tdma into a single tdma signal 20 that includes vbr cdma tdma data the receiver antenna 22 receives the superposition of all rf signals 16 and 24 the resulting received signal is processed to recover the original cbr data streams and vbr data streams these data streams are then sent by the receiver system to the appropriate users and applications the transmission process for the multiple access implementation of fig1 is shown in fig2 the process shown.