Patent ID: 6018543
Filing Date: 2000-01-25
Classification: H04B

Abstract:
In a frequency hopping digital communication network having a multimode radio transmitter for transmitting a data signal and a multimode radio receiver tuned for receiving the same, said multimode transmitter and receiver operable in a first standard mode and a second enhanced mode, each said mode having a late-net acquisition library period and an in-net acquisition library period, a method for obtaining a non-noisy frequency channel over which to receive said data signal transmitted across said radio network, said method comprising the steps of:successively averaging signal samples received over a particular frequency channel and time interval corresponding to said receiver mode and library period to determine the noise level of said particular reception frequency channel;comparing said averaged signal samples to a predetermined noise threshold to determine whether said frequency channel is noisy;tuning said receiver to a new reception frequency channel, said new frequency channel selectable from a group of permissible frequency channels responsive to said receiver mode and library period and in a predetermined sequence, when said noise threshold is exceeded;repeating the above steps until said noise threshold is not exceeded.