Patent ID: 6301470
Filing Date: 2001-10-09
Classification: H04B

Abstract:
A radio communications receiver for detecting first and second contemporaneously transmitted radio signals representative of first and second data, said receiver comprising:an adaptive antenna that receives said first and second radio signals and detects at least one first wave front from said first radio signals and at least one second wave front from said second radio signals, said adaptive antenna including:an antenna array having a number of adaptive antennas that detect versions of said first and second radio signals; anda spatio-temporal filter coupled to said antenna array, said spatio-temporal filter comprising:a spatial filter having a number of inputs coupled to said number of adaptive antennas outputs, and a number of outputs; anda wave front detector having a number of inputs coupled to said spatial filter number of outputs, and at least a first, a second and a third output, wherein said wave front detector generates said first and second radio signal wave fronts from said combined radio signal version, and wherein one of said at least one first wave fronts is output on said first wave front detector output, another of said at least one first wave fronts is output on said second wave front detector output, and at least one of said second wave fronts is output on said third wave front detector output;wherein said spatio-temporal filter combines said radio signal versions;a first data detector having a first input coupled to said first wave front detector output and a second input coupled to said first wave front detector output, wherein said first data detector recovers first data from said first wave front and outputs said first data;an interference canceller having a first input coupled to said first data detector output and a second input coupled to said third wave front detector output, and an output, wherein said interference cancellor re-constitutes said first radio signals from said first data and subtracts said re-constituted first radio signals from said at least one second wave front dependent on interference from said at least one first wave front to said at least one second wave front; anda second data detector having an input coupled to said interference cancellor output, wherein said second data detector recovers said second data from said at least one second wave front after said subtraction of said first wave front and outputs said second data, and wherein said first and second data are transmitted contemporaneously on at least common parts of the radio frequency spectrum.