A Frequency Hopped Demand Assigned Multiple Access scheme

A DAMA scheme is presented in which users gain access to a CDMA message channel via randomly selected Frequency Hopped Multiple Access (FHMA) request channels. The number of message channels that can be assigned is limited to a maximum value in order to limit error probabilities due to noise and cochannel interference. The problem of synchronization of Frequency Hopped signals is considered and a theoretical performance analysis of the scheme is presented. User generated interference with white gaussian noise background is considered. Measures of the FHDAMA scheme performance evaluated were the maximum number of message channels, the message channel occupancies, the bandwidth utilization and the probability of channel acquisition.