Correlator with cascade data paths to facilitate expansion of co

Details Correlator with cascade data paths to facilitate expansion of co Correlator with cascade data paths to facilitate expansion of co

1999-03-02

2000-03-14

Le, Amanda T.

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

375209, 708423, 708426, H03D 100

Patent

active

060382716

ABSTRACT:
A correlator is disclosed and includes a data bus for receiving blocks of n bit parallel in phase (I) and n bit parallel quadrature (Q) signal data and n bit parallel I and Q reference data from respective I and Q signal channels and I and Q reference channels. The I and Q reference data are correlated with a one bit shifted version of the respective n bit parallel I and Q signal data from an adjacent previous path to produce an I component signal output and Q component signal output along each of the individual n parallel paths. An output bus receives I and Q component signal outputs from the n parallel paths one at a time at one bit input time periods such that there is one correlation product output for every I and Q parallel n bits. A cascade adder circuit comprises at least one adder connected to the output bus and receives the I and Q component signal outputs from the output bus and delayed I and Q component signal outputs from another correlator. The cascade adder circuit sums the I and Q component signal outputs with the delayed I and Q component signal outputs from another correlator to allow correlator expansion.

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