Patent ID: 7233620
Filing Date: 2007-06-19
Classification: H04B

Abstract:
1. A bandwidth efficient modem in a multi-user environment for determining whether additional users can be added to a system, comprising: a front end unit for processing input received signals into a baseband waveform; a baseband waveform processor performing parameter estimation and demodulation of said baseband waveform, wherein said demodulation uses a processing scheme selected from at least one of the group consisting of: optimal maximum likelihood multi user detection (MUD), maximum likelihood MUD, maximum likelihood sequence estimation, successive interference cancellation, TurboMUD, iterative MUD, and linear algebra based MUD; a digital signal processor for reconstructing an estimate of each of one or more interfering signals and calculating a noise power, wherein said noise power is used by a network controller coupled to the bandwidth efficient modem to determine whether there is a sufficient noise margin to add said additional users, said network controller dynamically allocating channel assignments to the bandwidth efficient modem and wherein said reconstructing requires data from said parameter estimation and demodulation; and a waveform generator for processing channel communications, wherein said channel communications consist of message and signal information, communicated to said system.