Sampled data processing
First Claim
1. A system for preprocessing desired and undesired signals of a multiple signal environment comprising:
- a plurality of independent channel means for receiving signals from a multiple signal environment and providing a plurality of output signals;
an output terminal coupled to provide one of said independent channel means output signals as an unaltered first independent preprocessed auxiliary sample; and
second means coupled to said output terminal and each of the remaining independent channel means for sequentially decorrelating each remaining independent channel means output signal to form a plurality of independent preprocessed auxiliary samples as a first circulation, said second means being constructed to decorrelate each independent channel means output signal of the sequence from a prior preprocessed auxiliary sample to form one of said plurality of independent preprocessed auxiliary samples wherein said first independent preprocessed auxiliary sample forms said prior preprocessed auxiliary sample for decorrelating the first independent channel means output signal of the sequence and each preceeding independent preprocessed auxiliary sample of the sequence forms said prior preprocessed auxiliary sample for decorrelating the next succeeding independent channel means output signal of the sequence.
1 Assignment
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Accused Products
Abstract
An improved signal processing system and technique for preprocessing auxiry data signals by sequential decorrelation, particularly for use in systems employing adaptive cancaller loops. Each of a plurality of signal channels sample the environment of a plurality of signal sources and provide inputs to a configuration of adaptive canceller loops. The loops are connected such that an adaptive loop decorrelates the signal from two signal channels to form a preprocessed signal, and each of the remaining adaptive loops are sequentially connected such that each auxiliary channel signal is decorrelated from the preprocessed signal of the previous adaptive loop until all signal channels have been utilized. In a side-lobe canceller system each of the preprocessed outputs is used to form an auxiliary sample input to a main channel canceller loop to cancel interference in the receiving system. By using the preprocessed signals as the auxiliary input, a receiving system can significantly increase interference cancellation and reduce the number of iterations required.
7 Citations
11 Claims
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1. A system for preprocessing desired and undesired signals of a multiple signal environment comprising:
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a plurality of independent channel means for receiving signals from a multiple signal environment and providing a plurality of output signals; an output terminal coupled to provide one of said independent channel means output signals as an unaltered first independent preprocessed auxiliary sample; and second means coupled to said output terminal and each of the remaining independent channel means for sequentially decorrelating each remaining independent channel means output signal to form a plurality of independent preprocessed auxiliary samples as a first circulation, said second means being constructed to decorrelate each independent channel means output signal of the sequence from a prior preprocessed auxiliary sample to form one of said plurality of independent preprocessed auxiliary samples wherein said first independent preprocessed auxiliary sample forms said prior preprocessed auxiliary sample for decorrelating the first independent channel means output signal of the sequence and each preceeding independent preprocessed auxiliary sample of the sequence forms said prior preprocessed auxiliary sample for decorrelating the next succeeding independent channel means output signal of the sequence. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification