Good observation Gurpreet,In global parameter signal bit rate is defined i.e 200mbps and combined from 3 users is 600mbps as you said,but the bit rate used in global parameter is 10Gbps.I have run the system by varying the bi rate to 600mbps at bit rate ,but could not get any results.I think this data rate is taken to change the time window,since sequence length is large 1024.But i am not sure,i think Damian can give its right answer.
@Alsithu,i think there is some logic to take the value of Bit rate 10Gbps,otherwize system has to work on different data rates changed in Bit rate (by keeping signalrate constant)