Abstract: The present invention relates to a system and method for successive interference cancellation in a multi-user wireless communication system. In one aspect of the invention, a method of decoding signals from a plurality of superimposed signals is provided. In an embodiment, the plurality of superimposed signals are ranked in order of signal strength. The strongest signal is then decoded and a signal estimate thereof generated and subtracted from the plurality of superposition signals. The method repeats iteratively, decoding and canceling the strongest signal, until all signals are decoded. In another aspect of the invention, a system for decoding signals from a plurality of superimposed signals is provided. In an embodiment, the system is a wireless multi-user receiver.

Abstract: A receiver for receiving a signal is provided. The receiver comprises a pulse shaper that shapes a received signal using a transfer function, the pulse shaper being adapted to determine a set of coefficients for the transfer function based on the received signal. The receiver also comprises a mixer that mixes the shaped signal with a generated template to create a mixed signal, and an integrator that integrates the mixed signal to generate an integrated signal.

Abstract: This disclosure describes a method to generate large numbers of spot beams for multiple-beam satellite systems using smaller apertures. This is done by dividing the basic spot beam that has 3 to 4 dB of gain drop within the beam into a number of smaller 1-dB sub-beams. This has the effect of reducing the required peak gain for the antenna by 2-3 dB, thus reducing its size by as much as 50%. The frequency band allocated to the basic beam will be divided among the sub-beams. However, the frequency re-use among the basic beams can be maintained. Frequency allocations have to be coordinated among all beams. This concept is especially applicable to phased arrays using digital beam formers. The DBF complexity is a function of the number of array elements, and is less dependent on the number of beams. Reducing the array size, and consequently reducing the number of elements helps in reducing the complexity, power and mass of the DBF.

Abstract: The present invention uses low temperature co-fired ceramic (LTCC) technology for fabrication of micro-electro-mechnical systems (MEMS) based phase shifters. As a result, low-cost subarray modules can be constructed using LTCC, and the subarray modules (10) can be used as building blocks for large antenna arrays. In an exemplary description of the present invention, all layers of the multilayer subarray modules, including MEMS, are in LTCC. As a result, a significant cost reduction for satellite terminals using highly integrated LTCC subarray modules.