Signal analysis technique for determining a subject of binary se

Details Signal analysis technique for determining a subject of binary se Signal analysis technique for determining a subject of binary se

1992-07-01

1993-11-30

Kuntz, Curtis

Pulse or digital communications

Repeaters

Testing

375 1, 324 7612, 36472803, H04K 102

Patent

active

052672719

ABSTRACT:
A method and apparatus are disclosed whereby a received signal comprising a binary spreading-code sequence, which belongs to a set of binary spreading-code sequences available to a transmitting node of a multi-node communication network, can be analyzed to determine the particular sequence from the set of sequences available to the transmitting node that was actually transmitted. All sequences of the set of available sequences have the property that each sequence can be generated by the same configuration of two linear feedback binary shift registers, where the feedback taps on the two binary shift registers correspond to primitive polynomials of the same degree over GF(2), the field of two elements. The received signal is correlated with each sequence of the set of available sequences to obtain a set of correlation values. The correlation values having the largest and the next-largest magnitudes are compared, and if their ratio exceeds a predetermined threshold, a detection decision is made. If the ratio does not exceed the predetermined threshold, additional logic is implemented to declare a detection decision or an erasure. Once a detection decision has been made, the signal is decoded into a block of information bits corresponding to the largest correlation magnitude. The sign of the corresponding correlation value determines one additional information bit.

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patent: 4707839 (1987-11-01), Andren et al.
patent: 5016206 (1991-05-01), Shinonaga
patent: 5031173 (1991-07-01), Short et al.
patent: 5090023 (1992-02-01), Watanabe et al.

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