Communication system
First Claim
1. A communication system comprising:
- means for generating information to be communicated;
means for generating an overlapping signature signal in response to the information to be communicated;
means for communicating the overlapping signature signal to a remote location; and
filter means at the remote location for reconstructing the information to be communicated in response to the overlapping signature control communicated to the remote location.
0 Assignments
0 Petitions
Accused Products
Abstract
A digital filtering system is provided for communicating and processing signals using a digital filter for signal separation and signal enhancement. A digital correlator is provided for generating high resolution output data in response to low resolution input data processed with low resolution computational circuits. In one embodiment, a real-time time-domain correlator is provided with single-bit resolution computational elements to implement the correlation filtering operation. Use of the high speed real-time correlator of the present invention permits further enhancement of signals with the capability of compositing-after-correlation and with the capability of correlation using a plurality of correlation operators. Particular advantages are achieved with the use of the real-time correlator in a geophysical exploration system embodiment and in a communication embodiment. Systems applications of the digital filter includes a communications modem for modulating and demodulating chirp signals to enhance data communication and compositing-after-correlation in a geophysical exploration system. Detailed circuitry is provided to implement such systems including an improved chirp signal generator, a multi-chirp signal generator, a chirp modulator, and a correlation demodulator.
-
Citations
26 Claims
-
1. A communication system comprising:
-
means for generating information to be communicated; means for generating an overlapping signature signal in response to the information to be communicated; means for communicating the overlapping signature signal to a remote location; and filter means at the remote location for reconstructing the information to be communicated in response to the overlapping signature control communicated to the remote location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A communication system for communicating digital information in signature signal form, said system comprising:
-
input means for generating digital input signals; modulating means for generating signature signals in response to the digital input signals; communicating means for communicating the signature signals generated with said modulating means; and output means for generating digital output signals in response to the signature signals communicated with said communicating means. - View Dependent Claims (12, 13, 14, 15, 16)
-
-
17. A communication system comprising:
-
overlapping signal communication means for communicating information as a plurality of overlapping signature signals and output means for generating non-overlapping signals in response to the communicated overlapping signature signals. - View Dependent Claims (18)
-
-
19. A communication system comprising:
-
overlapping signal communication means for communicating information as a plurality of overlapping signatures, each signature in said plurality of overlapping signatures being different from the other signatures in said plurality of overlapping signatures and a filter processor for generating a plurality of nonoverlapping output signals in response to filter processing of each of the overlapping signatures included in the plurality of overlapping signatures communicated with said overlapping signal communication means.
-
-
20. A communication system comprising:
-
overlapping signature signal communication means for communicating information as a plurality of overlapping signature signals, said communication means including, (a) means for generating the information to be communicated, (b) means for generating an overlapping signature signal in response to the information to be communicated, and (c) means for communicating the overlapping signature signal to a remote location; and filter means at the remote location for reconstructing the information to be communicated to the remote location in response to the overlapping signature signal. - View Dependent Claims (21, 22, 23, 24, 25, 26)
-
Specification