A novel channel assignment to reduce intermodulation distortion in PCS

In cellular communications, only a subset of all available frequency channels are assigned to each cell, hence the interchannel spacing of channels may be wider than the required minimum. A random spacing channel assignment (RSCA) is proposed which exploits the wider inter-channel spacing of assigned channels in each cell to reduce the most deleterious third-order intermodulation distortion caused by the nonlinear devices. Results show that RSCA can reduce the third-order intermodulation noise power by approximately 4 to 5 dB and yet satisfy the minimum adjacent channel spacing requirement.