Abstract: A method, an apparatus and a communication unit for generating preceding feedback information in a multiple frequency radio transmission system are disclosed. A rank for preceding matrices, wherein the rank is constant over the multiple frequencies, is selected and a plurality of preceding matrices having the selected rank are selected. A different preceding matrix is selected for each frequency subset of the multiple frequencies.

Abstract: A description is given of a radio frequency module comprising an interface unit configured to receive macros having a first format from an input of the radio frequency module, a microprocessor coupled to the interface unit and operable to convert the macros having the first format to macros having a second format, a first memory coupled to the microprocessor and operable to store macros having the second format provided by the microprocessor and a first finite state machine implemented in hardware and configured to process macros having the second format accessed from the first memory.

Abstract: Systems and methods are provided for focusing a scanned ion beam in an ion implanter. A beam focusing system is provided, comprising first and second magnets providing corresponding magnetic fields that cooperatively provide a magnetic focusing field having a time-varying focusing field center generally corresponding to a time-varying beam position of a scanned ion beam along a scan direction. Methods are presented, comprising providing a focusing field having a focusing field center in the scan plane, and dynamically adjusting the focusing field such that the focusing field center is generally coincident with a time-varying beam position of the scanned ion beam along the scan direction.